/* ===================================
   AI Contents Bank - Promotion Page
   Art Deco / Retro-Futuristic Design
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Rich, Luxurious Palette */
    --gold-primary: #d4af37;
    --gold-light: #f4d03f;
    --gold-dark: #b8860b;
    --cyan-accent: #00d4ff;
    --cyan-dark: #0099cc;
    --bg-void: #030508;
    --bg-deep: #0a0d14;
    --bg-surface: #12161f;
    --bg-elevated: #1a1f2e;
    --text-bright: #ffffff;
    --text-primary: #e8e6e1;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-subtle: rgba(212, 175, 55, 0.15);
    --border-glow: rgba(212, 175, 55, 0.4);

    /* Gradients */
    --gradient-gold: linear-gradient(135deg, #d4af37 0%, #f4d03f 50%, #d4af37 100%);
    --gradient-gold-dark: linear-gradient(135deg, #b8860b 0%, #d4af37 100%);
    --gradient-cyan: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    --gradient-radial: radial-gradient(ellipse at center, rgba(212, 175, 55, 0.08) 0%, transparent 70%);

    /* Shadows */
    --shadow-gold: 0 0 60px rgba(212, 175, 55, 0.2);
    --shadow-cyan: 0 0 40px rgba(0, 212, 255, 0.15);
    --shadow-deep: 0 25px 80px rgba(0, 0, 0, 0.6);

    /* Typography */
    --font-display: 'Cinzel', serif;
    --font-body: 'LINE Seed JP', 'DM Sans', sans-serif;
    --font-jp: 'LINE Seed JP', sans-serif;

    /* Timing */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 0.2s var(--ease-out-expo);
    --transition-medium: 0.4s var(--ease-out-expo);
    --transition-slow: 0.8s var(--ease-out-expo);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: var(--font-body), var(--font-jp), sans-serif;
    background-color: var(--bg-void);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    position: relative;
    width: 100%;
    max-width: 100%;
}

/* Grain Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 10000;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display), serif;
    font-weight: 400;
    line-height: 1.3;
    letter-spacing: 0.04em;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ===================================
   Geometric Decorations
   =================================== */
.geo-line {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
    height: 1px;
    opacity: 0.3;
}

.geo-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 1px solid var(--gold-primary);
    opacity: 0.2;
}

.geo-corner--tl { top: 0; left: 0; border-right: none; border-bottom: none; }
.geo-corner--tr { top: 0; right: 0; border-left: none; border-bottom: none; }
.geo-corner--bl { bottom: 0; left: 0; border-right: none; border-top: none; }
.geo-corner--br { bottom: 0; right: 0; border-left: none; border-top: none; }

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    background: linear-gradient(180deg, rgba(3, 5, 8, 0.95) 0%, rgba(3, 5, 8, 0.8) 100%);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: var(--transition-medium);
}

.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    position: relative;
}

.logo img {
    height: 44px;
    width: auto;
    filter: drop-shadow(0 0 20px rgba(212, 175, 55, 0.3));
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 400;
    color: var(--gold-primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.header-cta {
    display: flex;
    gap: 16px;
    align-items: center;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -2;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    filter: saturate(0.3) brightness(0.4);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 50%, rgba(212, 175, 55, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, rgba(3, 5, 8, 0.6) 0%, rgba(3, 5, 8, 0.4) 40%, rgba(3, 5, 8, 0.9) 100%);
    z-index: -1;
}

/* Hero Geometric Lines */
.hero::before,
.hero::after {
    content: '';
    position: absolute;
    width: 1px;
    height: 40%;
    background: linear-gradient(180deg, transparent, var(--gold-primary), transparent);
    opacity: 0.2;
}

.hero::before {
    left: 10%;
    top: 20%;
}

.hero::after {
    right: 10%;
    bottom: 20%;
}

.hero-content {
    text-align: center;
    padding: 140px 32px 100px;
    max-width: 1000px;
    position: relative;
}

/* Decorative frame around hero content */
.hero-content::before {
    content: '';
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 1px;
    background: var(--gradient-gold);
}

.hero-logo {
    width: 100px;
    height: auto;
    margin-bottom: 40px;
    animation: floatGlow 4s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(212, 175, 55, 0.4));
}

@keyframes floatGlow {
    0%, 100% {
        transform: translateY(0);
        filter: drop-shadow(0 0 30px rgba(212, 175, 55, 0.4));
    }
    50% {
        transform: translateY(-12px);
        filter: drop-shadow(0 0 50px rgba(212, 175, 55, 0.6));
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    font-weight: 400;
    letter-spacing: 0.2em;
    margin-bottom: 24px;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold-primary) 40%, var(--text-bright) 60%, var(--gold-primary) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmerGold 8s ease-in-out infinite;
    text-shadow: none;
}

@keyframes shimmerGold {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-tagline {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--text-bright);
    margin-bottom: 48px;
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    padding: 20px 48px;
}

.hero-tagline::before,
.hero-tagline::after {
    content: '\25C6';
    font-size: 0.5em;
    color: var(--gold-primary);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.hero-tagline::before {
    left: 0;
}

.hero-tagline::after {
    right: 0;
}

.hero-description-box {
    background: linear-gradient(135deg, rgba(18, 22, 31, 0.9) 0%, rgba(10, 13, 20, 0.95) 100%);
    border: 1px solid var(--border-subtle);
    border-radius: 0;
    padding: 36px 48px;
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.hero-description-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--gold-primary), transparent);
}

.hero-description-box::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, var(--gold-primary), transparent);
}

.hero-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 2;
    margin: 0;
    font-family: var(--font-jp);
}

.release-badge {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    background: transparent;
    border: 2px solid var(--gold-primary);
    color: var(--gold-primary);
    padding: 16px 40px;
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 0.9rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 48px;
    position: relative;
    overflow: hidden;
}

.release-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.2), transparent);
    animation: badgeSweep 3s ease-in-out infinite;
}

@keyframes badgeSweep {
    0% { left: -100%; }
    50%, 100% { left: 100%; }
}

.release-badge-icon {
    font-size: 1.3rem;
}

.hero-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 40px;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--bg-void);
    box-shadow: var(--shadow-gold);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: var(--transition-medium);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 80px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-bright);
    border: 1px solid var(--border-glow);
}

.btn-secondary:hover {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.btn-demo {
    background: transparent;
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
}

.btn-demo:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
}

.btn-gold {
    background: var(--gradient-gold);
    color: var(--bg-void);
    box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 80px rgba(212, 175, 55, 0.4);
}

.btn-threads {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn-threads:hover {
    border-color: var(--text-secondary);
    background: var(--bg-elevated);
}

/* ===================================
   Sections
   =================================== */
section {
    padding: 120px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
}

.section-header::after {
    content: '';
    position: absolute;
    bottom: -24px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--gradient-gold);
}

.section-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold-primary);
    margin-bottom: 20px;
    position: relative;
    padding: 0 32px;
}

.section-label::before,
.section-label::after {
    content: '\2014';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gold-primary);
    opacity: 0.5;
}

.section-label::before { left: 0; }
.section-label::after { right: 0; }

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    font-family: var(--font-jp);
    line-height: 1.9;
}

/* ===================================
   Concept / What is Section
   =================================== */
.concept {
    background: var(--bg-deep);
    position: relative;
}

.concept::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-radial);
    pointer-events: none;
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2px;
    background: var(--border-subtle);
    position: relative;
}

.concept-card {
    background: var(--bg-deep);
    padding: 56px 40px;
    text-align: center;
    transition: var(--transition-medium);
    position: relative;
}

.concept-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--gold-primary);
    opacity: 0;
    transition: var(--transition-medium);
}

.concept-card:hover::before {
    opacity: 1;
}

.concept-card:hover {
    background: var(--bg-surface);
}

.concept-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 28px;
    background: transparent;
    border: 1px solid var(--border-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition-medium);
}

.concept-icon svg {
    width: 48px;
    height: 48px;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.concept-icon::before,
.concept-icon::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 1px solid var(--gold-primary);
}

.concept-icon::before {
    top: -5px;
    left: -5px;
    border-right: none;
    border-bottom: none;
}

.concept-icon::after {
    bottom: -5px;
    right: -5px;
    border-left: none;
    border-top: none;
}

.concept-card:hover .concept-icon {
    background: rgba(212, 175, 55, 0.06);
    border-color: var(--gold-primary);
}

.concept-card:hover .concept-icon svg {
    transform: scale(1.08);
    filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.4));
}

.concept-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-bright);
    letter-spacing: 0.08em;
}

.concept-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-family: var(--font-jp);
    line-height: 1.9;
}

/* ===================================
   Categories Section
   =================================== */
.categories {
    background: var(--bg-surface);
    position: relative;
}

.categories::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-radial);
    pointer-events: none;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
}

.category-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    padding: 48px 36px;
    text-align: center;
    transition: var(--transition-medium);
    position: relative;
}

.category-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, #00a8e8 0%, #00d4ff 50%, #00a8e8 100%);
    opacity: 0;
    z-index: -1;
    transition: var(--transition-medium);
}

.category-card:hover::before {
    opacity: 1;
}

.category-card:hover {
    background: var(--bg-elevated);
    transform: translateY(-8px);
}

.category-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    color: var(--text-bright);
    letter-spacing: 0.08em;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-family: var(--font-jp);
    line-height: 1.9;
}

/* ===================================
   Features Section
   =================================== */
.features {
    background: var(--bg-void);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-subtle), transparent);
}

.features-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px;
    margin-bottom: 0;
}

.feature-block {
    padding: 56px 48px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    position: relative;
    transition: var(--transition-medium);
}

.feature-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-cyan);
}

.feature-block::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--cyan-accent), transparent);
}

.feature-block:hover {
    border-color: var(--cyan-dark);
    box-shadow: var(--shadow-cyan);
}

.feature-block.gold::before {
    background: var(--gradient-gold);
}

.feature-block.gold::after {
    background: linear-gradient(180deg, var(--gold-primary), transparent);
}

.feature-block.gold:hover {
    border-color: var(--gold-dark);
    box-shadow: var(--shadow-gold);
}

.feature-label {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--cyan-accent);
    margin-bottom: 12px;
}

.feature-block.gold .feature-label {
    color: var(--gold-primary);
}

.feature-block h3 {
    font-size: 1.5rem;
    margin-bottom: 32px;
    letter-spacing: 0.05em;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-family: var(--font-jp);
}

.feature-list li:last-child {
    margin-bottom: 0;
}

.feature-list .icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    background: transparent;
    border: 1px solid var(--cyan-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan-accent);
    font-size: 0.7rem;
    margin-top: 2px;
}

.feature-block.gold .feature-list .icon {
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

/* ===================================
   Use Cases Section
   =================================== */
.use-cases {
    background: var(--bg-deep);
    position: relative;
    overflow: hidden;
}

.use-cases::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    position: relative;
}

.use-case-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-subtle);
    padding: 48px 36px;
    text-align: center;
    transition: var(--transition-medium);
    position: relative;
}

.use-case-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, #00a8e8 0%, #00d4ff 50%, #00a8e8 100%);
    opacity: 0;
    z-index: -1;
    transition: var(--transition-medium);
}

.use-case-card:hover::before {
    opacity: 1;
}

.use-case-card:hover {
    background: var(--bg-elevated);
    transform: translateY(-8px);
}

.use-case-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    background: rgba(0, 212, 255, 0.15);
    color: var(--cyan-accent);
    border: 1px solid rgba(0, 212, 255, 0.3);
    margin-bottom: 12px;
    font-family: var(--font-body);
}

.use-case-tag.lovart {
    background: rgba(212, 175, 55, 0.15);
    color: var(--gold-primary);
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.use-case-card h3 {
    font-size: 1.125rem;
    margin-bottom: 12px;
    color: var(--text-bright);
    letter-spacing: 0.05em;
    line-height: 1.5;
}

.use-case-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-family: var(--font-jp);
    line-height: 1.8;
    margin-bottom: 16px;
}

.use-case-price {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gold-primary);
    letter-spacing: 0.05em;
}

/* ===================================
   How It Works Section
   =================================== */
.how-it-works {
    background: var(--bg-surface);
    position: relative;
    overflow: hidden;
}

.how-it-works::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    counter-reset: step;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 80px;
    left: 16.67%;
    right: 16.67%;
    height: 1px;
    background: linear-gradient(90deg, var(--gold-primary), var(--gold-dark), var(--gold-primary));
    opacity: 0.3;
}

.step {
    position: relative;
    padding: 48px 40px;
    text-align: center;
    counter-increment: step;
}

.step::before {
    content: '0' counter(step);
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 400;
    color: var(--gold-primary);
    opacity: 0.15;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    line-height: 1;
}

.step::after {
    content: '';
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--bg-deep);
    border: 2px solid var(--gold-primary);
    z-index: 1;
}

.step h4 {
    font-size: 1.125rem;
    margin-bottom: 16px;
    margin-top: 48px;
    letter-spacing: 0.08em;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-family: var(--font-jp);
    line-height: 1.8;
}

/* ===================================
   CTA Section
   =================================== */
.cta {
    background: var(--bg-deep);
    text-align: center;
    padding: 140px 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.cta::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
    opacity: 0.3;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.cta h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    margin-bottom: 24px;
    letter-spacing: 0.08em;
}

.cta p {
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-size: 1rem;
    font-family: var(--font-jp);
    line-height: 1.9;
}

.cta-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.cta-benefits {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 24px 0 32px;
    flex-wrap: wrap;
}

.cta-benefit {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 16px 24px;
    text-align: center;
}

.cta-benefit-icon {
    font-size: 24px;
    margin-bottom: 4px;
}

.cta-benefit-text {
    font-size: 14px;
    color: var(--text-secondary);
    font-family: var(--font-jp);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--bg-void);
    border-top: 1px solid var(--border-subtle);
    padding: 60px 0 40px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: var(--gradient-gold);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 32px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-logo img {
    height: 36px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(212, 175, 55, 0.2));
}

.footer-logo span {
    font-family: var(--font-display);
    font-size: 0.9rem;
    color: var(--gold-primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    letter-spacing: 0.05em;
    transition: var(--transition-fast);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold-primary);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--gold-primary);
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-bottom {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
}

/* ===================================
   Modal
   =================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 5, 8, 0.9);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    padding: 32px;
    overflow-y: auto;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-deep) 100%);
    border: 1px solid var(--border-subtle);
    padding: 56px 48px;
    max-width: 500px;
    width: 100%;
    text-align: center;
    position: relative;
    transform: scale(0.9) translateY(30px);
    transition: var(--transition-medium);
    box-shadow: var(--shadow-deep), var(--shadow-gold);
}

.modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
}

.modal::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--gradient-gold);
    opacity: 0.5;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: 28px;
}

.modal-title {
    font-size: 1.75rem;
    margin-bottom: 24px;
    color: var(--text-bright);
    line-height: 1.4;
    letter-spacing: 0.05em;
}

.modal-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.9;
    margin-bottom: 36px;
    font-family: var(--font-jp);
}

.modal-description strong {
    color: var(--gold-primary);
    font-weight: 500;
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.modal-buttons .btn {
    width: 100%;
    justify-content: center;
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in-up {
    animation: fadeInUp 0.8s var(--ease-out-expo) forwards;
}

/* Staggered animations for cards */
.concept-card,
.category-card,
.use-case-card,
.step {
    opacity: 0;
    animation: fadeInUp 0.8s var(--ease-out-expo) forwards;
}

.concept-card:nth-child(1),
.category-card:nth-child(1),
.use-case-card:nth-child(1),
.step:nth-child(1) { animation-delay: 0.1s; }

.concept-card:nth-child(2),
.category-card:nth-child(2),
.use-case-card:nth-child(2),
.step:nth-child(2) { animation-delay: 0.2s; }

.concept-card:nth-child(3),
.category-card:nth-child(3),
.use-case-card:nth-child(3),
.step:nth-child(3) { animation-delay: 0.3s; }

.concept-card:nth-child(4),
.category-card:nth-child(4),
.use-case-card:nth-child(4) { animation-delay: 0.4s; }

.category-card:nth-child(5),
.use-case-card:nth-child(5) { animation-delay: 0.5s; }

.category-card:nth-child(6),
.use-case-card:nth-child(6) { animation-delay: 0.6s; }

/* ===================================
   Responsive
   =================================== */
@media (max-width: 1024px) {
    .container {
        padding: 0 24px;
    }

    section {
        padding: 80px 0;
    }

    .concept-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2px;
    }

    .categories-grid,
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .steps {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .steps::before {
        display: none;
    }

    .step::after {
        display: none;
    }

    .features-row {
        gap: 32px;
    }

    .feature-block {
        padding: 40px 32px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }

    .container {
        padding: 0 20px;
    }

    .header {
        padding: 16px 0;
    }

    .logo img {
        height: 36px;
    }

    .logo-text {
        font-size: 0.9rem;
        letter-spacing: 0.1em;
    }

    .header-cta .btn {
        padding: 12px 24px;
        font-size: 0.75rem;
    }

    .hero-content {
        padding: 120px 20px 80px;
    }

    .hero-logo {
        width: 70px;
        margin-bottom: 32px;
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: 0.15em;
    }

    .hero-tagline {
        font-size: 0.9rem;
        letter-spacing: 0.2em;
        padding: 16px 32px;
        margin-bottom: 36px;
    }

    .hero-description-box {
        padding: 28px 24px;
        clip-path: none;
    }

    .hero-description {
        font-size: 0.9375rem;
    }

    .release-badge {
        padding: 14px 28px;
        font-size: 0.8rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        padding: 14px 32px;
    }

    section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .section-label {
        font-size: 0.7rem;
        letter-spacing: 0.3em;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 0.9375rem;
    }

    .concept-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        background: transparent;
    }

    .categories-grid,
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .concept-card,
    .category-card,
    .use-case-card {
        padding: 36px 28px;
        border: 1px solid var(--border-subtle);
    }

    .concept-icon {
        width: 64px;
        height: 64px;
    }

    .concept-icon svg {
        width: 40px;
        height: 40px;
    }

    .features-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-block {
        padding: 32px 24px;
    }

    .feature-block h3 {
        font-size: 1.25rem;
        margin-bottom: 24px;
    }

    .steps {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .step {
        padding: 32px 24px;
        text-align: left;
        border: 1px solid var(--border-subtle);
        background: var(--bg-surface);
    }

    .step::before {
        position: static;
        display: block;
        font-size: 2.5rem;
        margin-bottom: 16px;
        transform: none;
    }

    .step h4 {
        margin-top: 0;
    }

    .cta {
        padding: 80px 0;
    }

    .cta h2 {
        font-size: 1.5rem;
    }

    .cta p {
        margin-bottom: 36px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        margin-bottom: 36px;
    }

    .cta-benefits {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .cta-benefit {
        width: 100%;
        max-width: 300px;
    }

    .footer {
        padding: 48px 0 32px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .footer-bottom {
        margin-top: 32px;
        padding-top: 24px;
    }

    .modal-overlay {
        padding: 20px;
    }

    .modal {
        padding: 40px 28px;
    }

    .modal-title {
        font-size: 1.5rem;
    }

    .modal-icon {
        font-size: 3rem;
        margin-bottom: 20px;
    }

    .modal-description {
        font-size: 0.875rem;
        margin-bottom: 28px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .hero-content {
        padding: 100px 16px 60px;
    }

    .hero-logo {
        width: 60px;
    }

    .hero-title {
        font-size: 1.75rem;
        letter-spacing: 0.1em;
    }

    .hero-tagline {
        font-size: 0.8rem;
        padding: 12px 24px;
    }

    .hero-tagline::before,
    .hero-tagline::after {
        display: none;
    }

    .hero-description-box {
        padding: 24px 20px;
    }

    .release-badge {
        padding: 12px 24px;
        font-size: 0.75rem;
    }

    .section-title {
        font-size: 1.375rem;
    }

    .categories-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .concept-card,
    .category-card,
    .use-case-card,
    .feature-block,
    .step {
        padding: 28px 20px;
    }

    .modal {
        padding: 32px 20px;
    }

    .modal-close {
        width: 36px;
        height: 36px;
        top: 12px;
        right: 12px;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-gold {
    color: var(--gold-primary);
}

.text-cyan {
    color: var(--cyan-accent);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.text-center { text-align: center; }

/* ===================================
   Community Highlights (AI勉強会 + Promotion Video)
   =================================== */
.community-highlights {
    background: var(--bg-deep);
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.community-highlights::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
}

.community-highlights::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 30%, rgba(212, 175, 55, 0.04) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 70%, rgba(0, 212, 255, 0.04) 0%, transparent 50%);
    pointer-events: none;
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    position: relative;
}

.highlight-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-subtle);
    padding: 64px 48px;
    text-align: center;
    position: relative;
    transition: var(--transition-medium);
    overflow: hidden;
    clip-path: polygon(24px 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%, 0 24px);
}

.highlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
}

.highlight-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--gold-primary), transparent);
}

.highlight-card--cyan::before {
    background: var(--gradient-cyan);
}

.highlight-card--cyan::after {
    background: linear-gradient(180deg, var(--cyan-accent), transparent);
}

.highlight-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-gold), var(--shadow-deep);
    border-color: var(--border-glow);
}

.highlight-card--cyan:hover {
    box-shadow: var(--shadow-cyan), var(--shadow-deep);
    border-color: var(--cyan-dark);
}

.highlight-ornament {
    width: 96px;
    height: 96px;
    margin: 0 auto 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.highlight-ornament svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 12px rgba(212, 175, 55, 0.25));
    transition: var(--transition-medium);
}

.highlight-card--cyan .highlight-ornament svg {
    filter: drop-shadow(0 0 12px rgba(0, 212, 255, 0.25));
}

.highlight-card:hover .highlight-ornament svg {
    transform: scale(1.08);
}

.highlight-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold-primary);
    margin-bottom: 16px;
}

.highlight-card--cyan .highlight-label {
    color: var(--cyan-accent);
}

.highlight-card h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    letter-spacing: 0.1em;
    color: var(--text-bright);
    margin-bottom: 20px;
}

.highlight-lead {
    font-family: var(--font-jp);
    color: var(--text-bright);
    font-size: 1.05rem;
    margin-bottom: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.highlight-text {
    font-family: var(--font-jp);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.9;
    margin-bottom: 36px;
}

/* ===================================
   Sub-page Hero (study-groups / videos / etc.)
   =================================== */
.sub-hero {
    background: var(--bg-deep);
    padding: 180px 0 80px;
    position: relative;
    overflow: hidden;
    text-align: center;
    border-bottom: 1px solid var(--border-subtle);
}

.sub-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 40% at 50% 30%, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.sub-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
}

.sub-hero-inner {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 32px;
}

.sub-hero-breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.sub-hero-breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.sub-hero-breadcrumb a:hover {
    color: var(--gold-primary);
}

.sub-hero-breadcrumb .sep {
    color: var(--gold-primary);
    opacity: 0.6;
}

.sub-hero-breadcrumb .current {
    color: var(--gold-primary);
}

.sub-hero-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold-primary);
    margin-bottom: 24px;
    position: relative;
    padding: 0 36px;
}

.sub-hero-label::before,
.sub-hero-label::after {
    content: '\25C6';
    font-size: 0.6em;
    color: var(--gold-primary);
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}

.sub-hero-label::before { left: 0; }
.sub-hero-label::after { right: 0; }

.sub-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 400;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--gold-light) 0%, var(--gold-primary) 40%, var(--text-bright) 60%, var(--gold-primary) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmerGold 8s ease-in-out infinite;
    margin-bottom: 20px;
}

.sub-hero-subtitle {
    font-family: var(--font-jp);
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    max-width: 640px;
    margin: 0 auto;
}

/* ===================================
   Study Groups List
   =================================== */
.sessions {
    background: var(--bg-void);
    padding: 100px 0;
    position: relative;
}

.sessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.session-card {
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-subtle);
    padding: 40px 36px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.session-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    transform: scaleX(0.3);
    transform-origin: left;
    transition: var(--transition-medium);
}

.session-card:hover::before {
    transform: scaleX(1);
}

.session-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-glow);
    box-shadow: var(--shadow-gold);
}

.session-card--upcoming {
    border-color: rgba(0, 212, 255, 0.3);
}

.session-card--upcoming::before {
    background: var(--gradient-cyan);
}

.session-card--upcoming:hover {
    box-shadow: var(--shadow-cyan);
    border-color: var(--cyan-dark);
}

.session-card--placeholder {
    opacity: 0.55;
    cursor: default;
    pointer-events: none;
}

.session-card--placeholder::before {
    display: none;
}

.session-number {
    font-family: var(--font-display);
    font-size: 3.5rem;
    line-height: 1;
    color: var(--gold-primary);
    opacity: 0.35;
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.session-card--upcoming .session-number {
    color: var(--cyan-accent);
}

.session-status {
    display: inline-block;
    padding: 4px 14px;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    border: 1px solid var(--gold-primary);
    color: var(--gold-primary);
    margin-bottom: 20px;
    background: rgba(212, 175, 55, 0.05);
}

.session-card--upcoming .session-status {
    border-color: var(--cyan-accent);
    color: var(--cyan-accent);
    background: rgba(0, 212, 255, 0.05);
}

.session-card--placeholder .session-status {
    border-color: var(--text-muted);
    color: var(--text-muted);
    background: transparent;
}

.session-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--text-bright);
    letter-spacing: 0.08em;
    margin-bottom: 20px;
}

.session-meta {
    list-style: none;
    margin: 0 0 24px;
    padding: 0;
}

.session-meta li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-family: var(--font-jp);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 10px;
}

.session-meta li:last-child {
    margin-bottom: 0;
}

.session-meta .meta-key {
    flex-shrink: 0;
    color: var(--gold-primary);
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    min-width: 64px;
    padding-top: 2px;
}

.session-cta {
    margin-top: auto;
    padding-top: 16px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--gold-primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.session-cta::after {
    content: '\2192';
    transition: var(--transition-fast);
}

.session-card:hover .session-cta::after {
    transform: translateX(6px);
}

.session-card--upcoming .session-cta {
    color: var(--cyan-accent);
}

/* ===================================
   Study Group Detail Page
   =================================== */
.session-detail {
    background: var(--bg-void);
    padding: 80px 0 100px;
    position: relative;
}

.session-detail-inner {
    max-width: 860px;
    margin: 0 auto;
}

.session-detail-header {
    text-align: center;
    padding-bottom: 48px;
    margin-bottom: 56px;
    border-bottom: 1px solid var(--border-subtle);
    position: relative;
}

.session-detail-header::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 1px;
    background: var(--gradient-gold);
}

.session-detail-date {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold-primary);
    margin-bottom: 20px;
}

.session-detail-title {
    font-family: var(--font-display);
    font-size: clamp(1.6rem, 3.5vw, 2.25rem);
    letter-spacing: 0.1em;
    color: var(--text-bright);
    margin-bottom: 28px;
    line-height: 1.4;
}

.session-detail-meta {
    display: inline-flex;
    flex-direction: column;
    gap: 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 20px 32px;
    text-align: left;
    font-family: var(--font-jp);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.session-detail-meta strong {
    color: var(--gold-primary);
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    font-weight: 400;
    margin-right: 12px;
}

.detail-block {
    margin-bottom: 64px;
    position: relative;
}

.detail-block:last-child {
    margin-bottom: 0;
}

.detail-block-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    color: var(--text-bright);
    margin-bottom: 24px;
    padding-left: 20px;
    position: relative;
}

.detail-block-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 22px;
    background: var(--gradient-gold);
}

.detail-topics {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
}

.detail-topics li {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    font-family: var(--font-jp);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.detail-topics li::before {
    content: '\25C6';
    color: var(--gold-primary);
    font-size: 0.7rem;
    flex-shrink: 0;
}

.detail-topics li:hover {
    border-color: var(--border-glow);
    background: var(--bg-elevated);
}

.detail-placeholder {
    padding: 48px 32px;
    border: 1px dashed var(--border-subtle);
    background: rgba(255, 255, 255, 0.02);
    text-align: center;
    font-family: var(--font-jp);
    color: var(--text-muted);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.detail-placeholder strong {
    display: block;
    color: var(--gold-primary);
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 8px;
    font-weight: 400;
}

.detail-photos {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.detail-photo {
    display: block;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    aspect-ratio: 16 / 9;
    transition: var(--transition-fast);
}

.detail-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.detail-photo:hover {
    border-color: var(--border-glow);
}

.detail-photo:hover img {
    transform: scale(1.04);
}

.detail-pdf {
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
}

.detail-pdf-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 28px 32px;
    border-bottom: 1px solid var(--border-subtle);
}

.detail-pdf-meta {
    flex: 1;
    min-width: 0;
}

.detail-pdf-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    color: var(--gold-primary);
    text-transform: uppercase;
    margin-bottom: 10px;
}

.detail-pdf-title {
    font-family: var(--font-jp);
    color: var(--text-bright);
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 8px;
    letter-spacing: 0.02em;
}

.detail-pdf-desc {
    font-family: var(--font-jp);
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.8;
    margin: 0;
}

.detail-pdf-header .btn {
    flex-shrink: 0;
}

.detail-pdf-embed {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #1a1a1a;
}

.detail-pdf-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.detail-actions {
    margin-top: 64px;
    padding-top: 48px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.detail-actions p {
    font-family: var(--font-jp);
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.95rem;
}

/* ===================================
   Forms (Survey / Register)
   =================================== */
.form-section {
    background: var(--bg-void);
    padding: 80px 0 120px;
}

.form-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 32px;
}

.form-intro {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 32px 36px;
    margin-bottom: 48px;
    position: relative;
    font-family: var(--font-jp);
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.9;
}

.form-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--gradient-gold);
}

.form-intro strong {
    color: var(--text-bright);
    font-weight: 700;
}

form.survey-form,
form.register-form {
    display: flex;
    flex-direction: column;
    gap: 36px;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.form-label {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    color: var(--text-bright);
    font-weight: 700;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

.form-required {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--gold-primary);
    border: 1px solid var(--gold-primary);
    vertical-align: middle;
}

.form-optional {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    border: 1px solid var(--text-muted);
    vertical-align: middle;
}

.form-note {
    font-family: var(--font-jp);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: -6px;
    line-height: 1.7;
}

.rating-scale {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.rating-option {
    position: relative;
}

.rating-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.rating-option label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 18px 8px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: var(--font-jp);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: center;
    line-height: 1.4;
}

.rating-option label strong {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--text-bright);
    margin-bottom: 4px;
    font-weight: 400;
}

.rating-option label:hover {
    border-color: var(--border-glow);
    color: var(--text-primary);
}

.rating-option input[type="radio"]:checked + label {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.rating-option input[type="radio"]:checked + label strong {
    color: var(--gold-primary);
}

.choice-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.choice-group--triple {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 480px) {
    .choice-group--triple {
        grid-template-columns: 1fr;
    }
}

.choice-option {
    position: relative;
}

.choice-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.choice-option label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition-fast);
}

.choice-option label:hover {
    border-color: var(--border-glow);
    color: var(--text-primary);
}

.choice-option input[type="radio"]:checked + label {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: var(--font-jp);
    font-size: 0.95rem;
    line-height: 1.7;
    transition: var(--transition-fast);
    outline: none;
    resize: vertical;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--gold-primary);
    background: var(--bg-elevated);
    box-shadow: 0 0 0 1px var(--gold-primary), 0 0 24px rgba(212, 175, 55, 0.15);
}

.form-textarea {
    min-height: 120px;
}

.form-submit {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.form-submit .btn {
    min-width: 280px;
}

.form-error {
    background: rgba(255, 80, 80, 0.08);
    border: 1px solid rgba(255, 80, 80, 0.4);
    color: #ff8080;
    padding: 16px 20px;
    font-family: var(--font-jp);
    font-size: 0.9rem;
    text-align: center;
    display: none;
}

.form-error.active {
    display: block;
}

.form-success {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--gold-primary);
    padding: 56px 40px;
    text-align: center;
    position: relative;
    display: none;
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.form-success.active {
    display: block;
}

.form-success::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
}

.form-success-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border: 1px solid var(--gold-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
    font-size: 2rem;
    background: rgba(212, 175, 55, 0.05);
}

.form-success h3 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: 0.1em;
    color: var(--text-bright);
    margin-bottom: 16px;
}

.form-success p {
    font-family: var(--font-jp);
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 32px;
}

/* === Registration form additions === */
.choice-stack {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.choice-stack .choice-option label {
    justify-content: flex-start;
    padding: 16px 20px;
    font-family: var(--font-jp);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    text-transform: none;
    text-align: left;
    line-height: 1.6;
    gap: 12px;
}

.choice-stack .choice-option label::before {
    content: '';
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    transition: var(--transition-fast);
}

.choice-stack .choice-option input[type="radio"]:checked + label::before {
    border-color: var(--gold-primary);
    background: radial-gradient(circle, var(--gold-primary) 0 5px, transparent 6px);
}

.checkbox-option {
    position: relative;
    display: block;
}

.checkbox-option input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkbox-option label {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: var(--font-jp);
    font-size: 0.95rem;
    line-height: 1.6;
    cursor: pointer;
    transition: var(--transition-fast);
}

.checkbox-option label::before {
    content: '';
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    margin-top: 3px;
    border: 1px solid var(--border-subtle);
    transition: var(--transition-fast);
}

.checkbox-option label:hover {
    border-color: var(--border-glow);
    color: var(--text-primary);
}

.checkbox-option input[type="checkbox"]:checked + label {
    background: rgba(212, 175, 55, 0.1);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

.checkbox-option input[type="checkbox"]:checked + label::before {
    background: var(--gold-primary);
    border-color: var(--gold-primary);
    box-shadow: inset 0 0 0 3px var(--bg-surface);
}

.terms-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 20px 24px;
    font-family: var(--font-jp);
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.9;
}

.terms-box ul {
    margin: 0;
    padding-left: 22px;
}

.terms-box ul ul {
    margin-top: 6px;
    padding-left: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.terms-box li {
    margin-bottom: 6px;
}

.conditional-input {
    margin-top: 12px;
    display: none;
}

.conditional-input.active {
    display: block;
}

/* ===================================
   Promotion Video Page
   =================================== */
.videos-section {
    background: var(--bg-void);
    padding: 100px 0;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.video-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: var(--transition-medium);
    display: flex;
    flex-direction: column;
}

.video-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-cyan);
    transform: scaleX(0.3);
    transform-origin: left;
    transition: var(--transition-medium);
    z-index: 2;
}

.video-card:hover::before {
    transform: scaleX(1);
}

.video-card:hover {
    transform: translateY(-6px);
    border-color: var(--cyan-dark);
    box-shadow: var(--shadow-cyan);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16 / 9;
    background: var(--bg-void);
    overflow: hidden;
}

.video-thumb video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.video-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, transparent 30%, rgba(0, 0, 0, 0.5) 100%);
    pointer-events: none;
    transition: var(--transition-fast);
}

.video-card:hover .video-thumb::after {
    background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.3) 100%);
}

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 72px;
    height: 72px;
    border: 2px solid var(--cyan-accent);
    background: rgba(3, 5, 8, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cyan-accent);
    transition: var(--transition-medium);
    z-index: 1;
}

.video-play-btn::before {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid currentColor;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 6px;
}

.video-card:hover .video-play-btn {
    transform: translate(-50%, -50%) scale(1.1);
    background: rgba(0, 212, 255, 0.15);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

.video-info {
    padding: 28px 32px;
}

.video-tag {
    display: inline-block;
    padding: 4px 12px;
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    color: var(--cyan-accent);
    margin-bottom: 14px;
}

.video-info h3 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    letter-spacing: 0.08em;
    color: var(--text-bright);
    margin-bottom: 12px;
    line-height: 1.5;
}

.video-info p {
    font-family: var(--font-jp);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.video-empty-note {
    margin-top: 48px;
    padding: 32px;
    text-align: center;
    border: 1px dashed var(--border-subtle);
    font-family: var(--font-jp);
    font-size: 0.9rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
}

/* Video player modal */
.video-modal {
    position: fixed;
    inset: 0;
    background: rgba(3, 5, 8, 0.95);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    padding: 32px;
}

.video-modal.active {
    opacity: 1;
    visibility: visible;
}

.video-modal-inner {
    position: relative;
    width: 100%;
    max-width: 1080px;
    transform: scale(0.96);
    transition: var(--transition-medium);
}

.video-modal.active .video-modal-inner {
    transform: scale(1);
}

.video-modal video {
    width: 100%;
    height: auto;
    max-height: 80vh;
    border: 1px solid var(--gold-primary);
    box-shadow: var(--shadow-gold), var(--shadow-deep);
    background: var(--bg-void);
    display: block;
}

.video-modal-close {
    position: absolute;
    top: -56px;
    right: 0;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1px solid var(--border-glow);
    color: var(--text-bright);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    line-height: 1;
}

.video-modal-close:hover {
    background: rgba(212, 175, 55, 0.15);
    border-color: var(--gold-primary);
    color: var(--gold-primary);
}

/* ===================================
   Community Highlights Responsive
   =================================== */
@media (max-width: 768px) {
    .community-highlights {
        padding: 60px 0;
    }

    .highlights-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .highlight-card {
        padding: 48px 28px;
    }

    .highlight-ornament {
        width: 72px;
        height: 72px;
    }

    .sub-hero {
        padding: 140px 0 60px;
    }

    .sub-hero-breadcrumb {
        font-size: 0.7rem;
        letter-spacing: 0.2em;
        gap: 8px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .sessions {
        padding: 60px 0;
    }

    .sessions-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .session-card {
        padding: 32px 28px;
    }

    .session-number {
        font-size: 2.75rem;
    }

    .session-detail {
        padding: 60px 0 80px;
    }

    .session-detail-meta {
        padding: 16px 20px;
        font-size: 0.85rem;
    }

    .detail-topics li {
        padding: 14px 18px;
        font-size: 0.9rem;
    }

    .detail-photos {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .detail-pdf-header {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        padding: 22px 22px;
    }

    .detail-pdf-header .btn {
        width: 100%;
        text-align: center;
    }

    .detail-pdf-title {
        font-size: 1.05rem;
    }

    .detail-pdf-desc {
        font-size: 0.8rem;
    }

    .detail-pdf-embed {
        aspect-ratio: 4 / 3;
    }

    .form-section {
        padding: 60px 0 80px;
    }

    .form-container {
        padding: 0 20px;
    }

    .form-intro {
        padding: 24px 22px;
    }

    .rating-scale {
        grid-template-columns: repeat(5, 1fr);
        gap: 6px;
    }

    .rating-option label {
        padding: 12px 4px;
        font-size: 0.65rem;
    }

    .rating-option label strong {
        font-size: 1.15rem;
    }

    .choice-group {
        grid-template-columns: 1fr;
    }

    .videos-section {
        padding: 60px 0;
    }

    .videos-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .video-play-btn {
        width: 56px;
        height: 56px;
    }

    .video-play-btn::before {
        border-left-width: 14px;
        border-top-width: 10px;
        border-bottom-width: 10px;
    }

    .video-info {
        padding: 20px 22px;
    }

    .video-modal {
        padding: 20px;
    }

    .video-modal-close {
        top: -48px;
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
    }
}

/* ===================================
   Community Highlights — Triple (3 card layout)
   =================================== */
.highlights-grid--triple {
    grid-template-columns: repeat(3, 1fr);
}

.highlight-card--roadmap::before {
    background: linear-gradient(90deg, var(--gold-primary), var(--cyan-accent), var(--gold-primary));
}

.highlight-card--roadmap::after {
    background: linear-gradient(180deg, var(--gold-primary), var(--cyan-accent), transparent);
}

.highlight-card--roadmap .highlight-label {
    color: var(--gold-primary);
}

.highlight-card--roadmap .highlight-ornament svg {
    filter: drop-shadow(0 0 12px rgba(212, 175, 55, 0.2)) drop-shadow(0 0 8px rgba(0, 212, 255, 0.15));
}

.btn-roadmap {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    color: var(--gold-primary);
    border: 1px solid var(--gold-primary);
    letter-spacing: 0.15em;
}

.btn-roadmap::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.2), transparent);
    transition: var(--transition-medium);
}

.btn-roadmap:hover::before {
    left: 100%;
}

.btn-roadmap:hover {
    background: rgba(212, 175, 55, 0.1);
    color: var(--gold-light);
    transform: translateY(-3px);
    box-shadow: 0 0 40px rgba(212, 175, 55, 0.25);
}

@media (max-width: 1024px) {
    .highlights-grid--triple {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ===================================
   Release Badge — Phase variant (2-line)
   =================================== */
.release-badge--phase {
    flex-direction: column;
    gap: 6px;
    padding: 14px 40px;
    line-height: 1.3;
}

.release-badge--phase .release-badge-phase {
    font-size: 0.72rem;
    letter-spacing: 0.35em;
    color: var(--gold-primary);
    opacity: 0.85;
}

.release-badge--phase .release-badge-date {
    font-size: 1.15rem;
    letter-spacing: 0.15em;
    color: var(--gold-light);
    font-weight: 500;
}

.release-badge--phase .release-badge-date time {
    font: inherit;
    color: inherit;
}

@media (max-width: 480px) {
    .release-badge--phase {
        padding: 12px 28px;
    }

    .release-badge--phase .release-badge-phase {
        font-size: 0.65rem;
        letter-spacing: 0.25em;
    }

    .release-badge--phase .release-badge-date {
        font-size: 0.95rem;
    }
}

/* ===================================
   AI Solution Kit structure grid (3 cols)
   =================================== */
.categories-grid--triple {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.categories-note {
    margin-top: 48px;
    padding: 24px 32px;
    background: rgba(212, 175, 55, 0.04);
    border: 1px dashed var(--border-subtle);
    text-align: center;
    font-family: var(--font-jp);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.8;
    letter-spacing: 0.02em;
}

@media (max-width: 1024px) {
    .categories-grid--triple {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .categories-grid--triple {
        grid-template-columns: 1fr;
    }

    .categories-note {
        padding: 20px 24px;
        font-size: 0.8125rem;
    }
}

/* ===================================
   Roadmap Page — Timeline
   =================================== */
.roadmap-section {
    background: var(--bg-void);
    padding: 100px 0 120px;
    position: relative;
}

.roadmap-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold-primary), transparent);
    opacity: 0.4;
}

.roadmap-timeline {
    position: relative;
    max-width: 960px;
    margin: 0 auto;
    padding: 16px 0;
}

.roadmap-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 40px;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(212, 175, 55, 0.3) 8%, rgba(212, 175, 55, 0.3) 92%, transparent);
}

.roadmap-phase {
    position: relative;
    padding-left: 96px;
    margin-bottom: 64px;
}

.roadmap-phase:last-child {
    margin-bottom: 0;
}

.roadmap-node {
    position: absolute;
    top: 28px;
    left: 24px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-void);
    border: 2px solid var(--gold-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.roadmap-node::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--cyan-accent);
    opacity: 0.6;
}

.roadmap-phase[data-phase-status="completed"] .roadmap-node {
    background: var(--gradient-gold);
    border-color: var(--gold-light);
}

.roadmap-phase[data-phase-status="completed"] .roadmap-node::before {
    background: var(--bg-void);
    opacity: 1;
}

.roadmap-phase[data-phase-status="active"] .roadmap-node {
    background: rgba(212, 175, 55, 0.15);
    border-color: var(--gold-light);
    animation: roadmapPulse 2.4s var(--ease-out-expo) infinite;
}

.roadmap-phase[data-phase-status="active"] .roadmap-node::before {
    background: var(--gold-light);
    box-shadow: 0 0 12px rgba(244, 208, 63, 0.8);
}

@keyframes roadmapPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.6), 0 0 20px rgba(212, 175, 55, 0.35);
    }
    50% {
        box-shadow: 0 0 0 14px rgba(212, 175, 55, 0), 0 0 36px rgba(212, 175, 55, 0.55);
    }
}

.roadmap-card {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--border-subtle);
    padding: 40px 44px;
    position: relative;
    transition: var(--transition-medium);
    clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.roadmap-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-gold);
    opacity: 0.6;
}

.roadmap-phase:hover .roadmap-card {
    border-color: var(--border-glow);
    box-shadow: 0 0 60px rgba(212, 175, 55, 0.2);
}

.roadmap-phase[data-phase-status="active"] .roadmap-card {
    border-color: var(--gold-primary);
    box-shadow: 0 0 48px rgba(212, 175, 55, 0.18);
}

.roadmap-phase[data-phase-status="active"] .roadmap-card::before {
    opacity: 1;
    background: var(--gradient-gold);
}

.roadmap-phase[data-phase-status="upcoming"] .roadmap-card {
    opacity: 0.88;
}

.roadmap-phase[data-phase-status="upcoming"] .roadmap-card::before {
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.4), transparent);
    opacity: 0.4;
}

.roadmap-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.roadmap-card-labels {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
}

.roadmap-phase-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--gold-primary);
    padding: 4px 12px;
    border: 1px solid var(--gold-primary);
    background: rgba(212, 175, 55, 0.05);
}

.roadmap-status-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    padding: 4px 12px;
    border: 1px solid var(--text-muted);
    color: var(--text-muted);
    background: transparent;
}

.roadmap-phase[data-phase-status="completed"] .roadmap-status-label {
    border-color: var(--cyan-accent);
    color: var(--cyan-accent);
    background: rgba(0, 212, 255, 0.08);
}

.roadmap-phase[data-phase-status="active"] .roadmap-status-label {
    border-color: var(--gold-primary);
    color: var(--gold-primary);
    background: rgba(212, 175, 55, 0.1);
}

.roadmap-phase-date {
    font-family: var(--font-display);
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    color: var(--gold-primary);
}

.roadmap-phase-date time {
    font: inherit;
    color: inherit;
}

.roadmap-card h2 {
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.4vw, 1.75rem);
    letter-spacing: 0.06em;
    line-height: 1.5;
    color: var(--text-bright);
    margin-bottom: 20px;
}

.roadmap-intent {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.8;
    margin-bottom: 20px;
    padding-left: 16px;
    border-left: 2px solid var(--gold-primary);
}

.roadmap-intent strong {
    color: var(--gold-primary);
    font-weight: 500;
}

.roadmap-features {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
    display: grid;
    gap: 10px;
}

.roadmap-features li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    font-family: var(--font-jp);
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.roadmap-features li .icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 1px solid var(--gold-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-primary);
    font-size: 0.6rem;
    margin-top: 3px;
}

.roadmap-features li strong {
    color: var(--gold-primary);
    font-weight: 500;
}

.roadmap-pricing {
    font-family: var(--font-jp);
    font-size: 0.8125rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 4px;
    padding-top: 12px;
    border-top: 1px dashed var(--border-subtle);
}

.roadmap-pricing strong {
    color: var(--gold-primary);
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-right: 10px;
    font-weight: 400;
}

/* ===================================
   Roadmap — Creator CTA Block (bottom of timeline)
   =================================== */
.roadmap-cta-block {
    max-width: 860px;
    margin: 96px auto 0;
    padding: 56px 48px 60px;
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-elevated) 100%);
    border: 1px solid var(--gold-primary);
    text-align: center;
    position: relative;
    clip-path: polygon(28px 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%, 0 28px);
    box-shadow: 0 0 80px rgba(212, 175, 55, 0.15);
}

.roadmap-cta-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-gold);
}

.roadmap-cta-label {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--gold-primary);
    margin-bottom: 20px;
    padding: 0 28px;
    position: relative;
}

.roadmap-cta-label::before,
.roadmap-cta-label::after {
    content: '\25C6';
    font-size: 0.6em;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gold-primary);
}

.roadmap-cta-label::before { left: 0; }
.roadmap-cta-label::after { right: 0; }

.roadmap-cta-title {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 2rem);
    letter-spacing: 0.08em;
    line-height: 1.5;
    color: var(--text-bright);
    margin-bottom: 24px;
}

.roadmap-cta-copy {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 36px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

.roadmap-cta-copy strong {
    color: var(--gold-primary);
    font-weight: 500;
}

.roadmap-cta-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 40px;
}

.roadmap-cta-stat {
    background: rgba(212, 175, 55, 0.06);
    border: 1px solid var(--border-subtle);
    padding: 24px 12px;
    text-align: center;
}

.roadmap-cta-stat-num {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3.5vw, 2.25rem);
    font-weight: 500;
    color: var(--gold-primary);
    letter-spacing: 0.04em;
    line-height: 1.1;
    margin-bottom: 10px;
}

.roadmap-cta-stat-label {
    font-family: var(--font-jp);
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.6;
    letter-spacing: 0.04em;
}

.roadmap-cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .roadmap-section {
        padding: 56px 0 72px;
    }

    .roadmap-timeline::before {
        left: 14px;
    }

    .roadmap-phase {
        padding-left: 44px;
        margin-bottom: 32px;
    }

    .roadmap-node {
        left: 0;
        width: 28px;
        height: 28px;
        top: 18px;
    }

    .roadmap-card {
        padding: 24px 20px;
        clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
    }

    .roadmap-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        margin-bottom: 14px;
    }

    .roadmap-card h2 {
        font-size: 1.2rem;
        margin-bottom: 14px;
    }

    .roadmap-intent {
        font-size: 0.875rem;
        line-height: 1.75;
        padding-left: 12px;
        margin-bottom: 16px;
    }

    .roadmap-features {
        gap: 8px;
        margin-bottom: 14px;
    }

    .roadmap-features li {
        font-size: 0.825rem;
        line-height: 1.7;
        gap: 10px;
    }

    .roadmap-features li .icon {
        width: 18px;
        height: 18px;
    }

    .roadmap-pricing {
        font-size: 0.75rem;
    }

    .roadmap-cta-block {
        margin-top: 60px;
        padding: 40px 24px 44px;
        clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
    }

    .roadmap-cta-copy {
        font-size: 0.875rem;
    }

    .roadmap-cta-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        margin-bottom: 32px;
    }

    .roadmap-cta-stat {
        padding: 18px 6px;
    }

    .roadmap-cta-stat-num {
        font-size: 1.35rem;
    }

    .roadmap-cta-stat-label {
        font-size: 0.65rem;
        letter-spacing: 0;
    }

    .roadmap-cta-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .roadmap-cta-actions .btn {
        width: 100%;
        max-width: 320px;
    }
}

/* ===================================
   Study Group Detail — Readability fixes
   （vol-02 / vol-03 のスマホ・タブレット対応）
   =================================== */

/* 箇条書きが複数行になっても ◆ が先頭行の高さに揃うようにする */
.detail-topics li {
    align-items: flex-start;
    line-height: 1.7;
}

.detail-topics li::before {
    margin-top: 0.35em;
}

/* 「参加にあたっての補足」など、長文の注意書き向けの読みやすいリスト。
   1項目1段落で、区切り線付きのカード型にまとめる。 */
.detail-notes {
    list-style: none;
    padding: 0;
    margin: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
}

.detail-notes li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 26px;
    font-family: var(--font-jp);
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.85;
    border-bottom: 1px solid var(--border-subtle);
}

.detail-notes li:last-child {
    border-bottom: 0;
}

.detail-notes li::before {
    content: '\25C6';
    color: var(--gold-primary);
    font-size: 0.6rem;
    flex-shrink: 0;
    margin-top: 0.55em;
}

.detail-notes strong {
    color: var(--gold-primary);
}

/* タブレット以下：補足リストの余白を詰める */
@media (max-width: 1024px) {
    .detail-notes li {
        padding: 16px 22px;
        font-size: 0.9rem;
    }
}

/* スマホ：強制改行をなくし、メタ情報を縦積みにして読みやすくする */
@media (max-width: 768px) {
    /* ヒーロー文・導入文・CTA文の <br> による不自然な改行を解除し、自然に折り返す */
    .sub-hero-subtitle br,
    .detail-block > p br,
    .detail-actions p br {
        display: none;
    }

    .sub-hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.85;
        text-align: left;
        padding: 0 4px;
    }

    .session-detail-title {
        line-height: 1.45;
    }

    /* 開催情報：ラベルを上、内容を下に縦積みして折り返しを整える */
    .session-detail-meta {
        display: flex;
        width: 100%;
        gap: 16px;
        padding: 18px 20px;
    }

    .session-detail-meta > div {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .session-detail-meta strong {
        margin-right: 0;
        margin-bottom: 2px;
    }

    .detail-notes li {
        padding: 16px 18px;
        font-size: 0.88rem;
        line-height: 1.8;
        gap: 12px;
    }
}

/* 小型スマホ：見出し・本文をさらに調整 */
@media (max-width: 480px) {
    .detail-block-title {
        font-size: 1.1rem;
    }

    .sub-hero-subtitle {
        font-size: 0.9rem;
    }

    .detail-topics li {
        padding: 14px 16px;
        font-size: 0.875rem;
    }
}

/* スマホ：参加登録／アンケートフォームの操作性向上 */
@media (max-width: 768px) {
    .form-section {
        padding: 56px 0 80px;
    }

    .form-container {
        padding: 0 20px;
    }

    .form-intro {
        padding: 24px 22px;
        margin-bottom: 36px;
        font-size: 0.9rem;
    }

    /* iOS Safari は font-size が 16px 未満の入力欄にフォーカスすると
       ページ全体を自動ズームしてしまう。16px を明示してズームを防ぎつつ
       スマホ向けに余白も調整する */
    .form-input,
    .form-textarea {
        font-size: 16px;
        padding: 14px 16px;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: 0 16px;
    }

    .form-intro {
        padding: 20px 18px;
    }
}

/* ===================================
   Invitation Code Section
   =================================== */
.invite {
    background: var(--bg-deep);
    position: relative;
    overflow: hidden;
}

.invite::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.07) 0%, transparent 55%);
    pointer-events: none;
}

.invite .container {
    position: relative;
    z-index: 1;
}

/* Rate comparison */
.invite-compare {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.invite-rate {
    position: relative;
    flex: 0 1 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 40px 30px 32px;
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.03);
    text-align: center;
    overflow: hidden;
}

.invite-rate::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.04), transparent 60%);
    pointer-events: none;
}

.invite-rate-tag {
    font-family: var(--font-jp);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    padding: 4px 14px;
    border: 1px solid var(--border-subtle);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.02);
}

.invite-rate-tag--gold {
    color: var(--gold-light);
    border-color: var(--border-glow);
    background: rgba(212, 175, 55, 0.1);
}

.invite-rate-label {
    font-family: var(--font-jp);
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

.invite-rate-label strong {
    color: var(--text-primary);
}

.invite-rate-value {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 4rem);
    font-weight: 600;
    line-height: 1;
    color: var(--text-muted);
    margin-top: 4px;
}

.invite-rate-unit {
    font-size: 0.45em;
    margin-left: 2px;
}

/* mini proportion bar under each rate */
.invite-rate-bar {
    width: 100%;
    max-width: 180px;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    overflow: hidden;
    margin-top: 6px;
}

.invite-rate-bar-fill {
    display: block;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--text-muted), var(--text-secondary));
}

.invite-rate-bar-fill--gold {
    background: var(--gradient-gold);
    box-shadow: 0 0 12px rgba(212, 175, 55, 0.5);
}

.invite-rate--gold {
    border: 2px solid var(--gold-primary);
    background: rgba(212, 175, 55, 0.08);
    box-shadow: var(--shadow-gold);
}

.invite-rate--gold .invite-rate-label {
    color: var(--text-primary);
}

.invite-rate--gold .invite-rate-label strong {
    color: var(--gold-light);
}

.invite-rate--gold .invite-rate-value {
    color: var(--gold-light);
}

/* gold "永久" ribbon */
.invite-rate-ribbon {
    position: absolute;
    top: 14px;
    right: -34px;
    transform: rotate(45deg);
    width: 120px;
    text-align: center;
    font-family: var(--font-jp);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    font-weight: 700;
    color: var(--bg-void);
    background: var(--gradient-gold);
    padding: 4px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* connector with savings badge */
.invite-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 0 22px;
    flex: 0 0 auto;
}

.invite-save-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 14px 18px;
    border-radius: 14px;
    border: 1px solid var(--border-glow);
    background: radial-gradient(circle at 50% 30%, rgba(212, 175, 55, 0.18), rgba(212, 175, 55, 0.04));
    box-shadow: 0 0 30px rgba(212, 175, 55, 0.18);
}

.invite-save-num {
    font-family: var(--font-display);
    font-size: 1.9rem;
    font-weight: 700;
    line-height: 1;
    color: var(--gold-light);
}

.invite-save-pt {
    font-size: 0.5em;
    margin-left: 1px;
    color: var(--gold-primary);
}

.invite-save-text {
    font-family: var(--font-jp);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.invite-connector-arrow {
    width: 64px;
    height: 24px;
}

.invite-note {
    text-align: center;
    font-family: var(--font-jp);
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto 72px;
}

.invite-note strong {
    color: var(--gold-light);
}

/* How to get */
.invite-methods-title {
    text-align: center;
    font-size: clamp(1.3rem, 3vw, 1.6rem);
    letter-spacing: 0.08em;
    margin-bottom: 40px;
    color: var(--text-bright);
}

.invite-methods-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 56px;
}

.invite-method-card {
    position: relative;
    padding: 36px 28px;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    transition: var(--transition-medium);
    display: flex;
    flex-direction: column;
}

.invite-method-card:hover {
    border-color: var(--border-glow);
    transform: translateY(-4px);
    box-shadow: var(--shadow-deep);
}

.invite-method-num {
    position: absolute;
    top: 18px;
    right: 20px;
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: 0.12em;
    color: var(--gold-primary);
    opacity: 0.35;
    transition: var(--transition-medium);
}

.invite-method-card:hover .invite-method-num {
    opacity: 0.7;
}

/* SVG diagram icon */
.invite-method-icon {
    width: 76px;
    height: 76px;
    margin-bottom: 24px;
    border: 1px solid var(--border-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition-medium);
}

.invite-method-icon svg {
    width: 46px;
    height: 46px;
    transition: transform 0.3s ease, filter 0.3s ease;
}

.invite-method-icon::before,
.invite-method-icon::after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border: 1px solid var(--gold-primary);
}

.invite-method-icon::before {
    top: -5px;
    left: -5px;
    border-right: none;
    border-bottom: none;
}

.invite-method-icon::after {
    bottom: -5px;
    right: -5px;
    border-left: none;
    border-top: none;
}

.invite-method-card:hover .invite-method-icon {
    background: rgba(212, 175, 55, 0.06);
    border-color: var(--gold-primary);
}

.invite-method-card:hover .invite-method-icon svg {
    transform: scale(1.06);
    filter: drop-shadow(0 0 8px rgba(212, 175, 55, 0.4));
}

.invite-method-card h4 {
    font-size: 1.15rem;
    letter-spacing: 0.05em;
    margin-bottom: 14px;
    color: var(--text-bright);
}

.invite-method-card p {
    font-family: var(--font-jp);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    flex: 1;
}

.invite-method-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 24px;
}

.invite-method-links .btn {
    width: 100%;
    padding: 12px 20px;
    font-size: 0.72rem;
    text-transform: none;
}

.invite-period {
    text-align: center;
    font-family: var(--font-jp);
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    color: var(--text-primary);
    padding: 18px 32px;
    border: 1px dashed var(--gold-primary);
    border-radius: 12px;
    display: inline-block;
    width: auto;
    margin: 0 auto;
}

.invite .invite-period {
    display: table;
}

.invite-period strong {
    color: var(--gold-light);
}

@media (max-width: 1024px) {
    .invite-methods-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .invite-compare {
        flex-direction: column;
        align-items: center;
        gap: 0;
    }

    .invite-connector {
        flex-direction: row-reverse;
        gap: 14px;
        padding: 18px 0;
    }

    .invite-connector-arrow {
        transform: rotate(90deg);
    }

    .invite-rate {
        flex: 1 1 100%;
        width: 100%;
        max-width: 340px;
    }

    .invite-period {
        font-size: 0.95rem;
        padding: 16px 22px;
    }
}