/* Oceanic Muse: CSS Custom Styling */

:root {
    --primary-color: #0F5A60;       /* 深みのあるエメラルドグリーン */
    --primary-light: #167e87;       /* 明るめのエメラルド */
    --primary-dark: #072a2d;        /* より深いエメラルド */
    --accent-color: #F43F5E;        /* 柔らかなローズ */
    --accent-light: #fb7185;        /* 明るめのローズ */
    
    --bg-dark-start: #0c292c;       /* 背景グラデーション開始 */
    --bg-dark-end: #051416;         /* 背景グラデーション終了 */
    --gradient-hero: linear-gradient(135deg, #0e3d42 0%, #051719 100%);
    --gradient-beachlog: linear-gradient(135deg, #0F5A60 0%, #F43F5E 100%);
    --gradient-rose: linear-gradient(135deg, #F43F5E 0%, #fb7185 100%);
    
    --text-light: #f7fafc;          /* 明るいテキスト */
    --text-muted: #a0aec0;          /* 落ち着いたテキスト */
    --text-dark: #1a202c;           /* ライト要素用ダークテキスト */
    
    --glass-bg: rgba(15, 90, 96, 0.15);
    --glass-bg-hover: rgba(15, 90, 96, 0.25);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark-end);
    background-image: radial-gradient(circle at 20% 30%, #0d383c 0%, transparent 40%),
                      radial-gradient(circle at 80% 70%, #081d20 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-light);
    font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
}

/* Header Styling */
header {
    background: transparent;
    box-shadow: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
}

header.subpage-header {
    background: rgba(12, 41, 44, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    border-bottom: 1px solid var(--glass-border);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.back-to-portal {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.back-to-portal:hover {
    color: var(--text-light);
}

.logo a {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo img {
    height: 45px;
    width: 45px;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.logo span {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    background: linear-gradient(135deg, #fff 60%, var(--text-muted));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Nav tabs */
nav .tabs {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.5rem;
}

nav .tab a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

nav .tab a:hover {
    color: var(--text-light);
    background: rgba(255, 255, 255, 0.05);
}

nav .tab a.active {
    color: var(--text-light);
    background: rgba(15, 90, 96, 0.3);
    border: 1px solid var(--glass-border);
}

/* Mobile navigation toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 200;
}

/* Main Container */
main.beachlog-main {
    padding: 0;
    max-width: 100%;
    margin: 0;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 0 2rem;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 30%, rgba(5, 20, 22, 0.8) 100%),
                url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='20' viewBox='0 0 100 20'%3E%3Cpath d='M0 10 Q 25 5, 50 10 T 100 10' fill='none' stroke='rgba(15,90,96,0.06)' stroke-width='2'/%3E%3C/svg%3E") repeat;
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 30%, #a5d3d7 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.hero-subtitle {
    font-size: 1.35rem;
    color: var(--text-muted);
    margin-bottom: 3.5rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* CTA Buttons */
.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    font-size: 1.05rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn i {
    margin-right: 0.6rem;
    font-size: 1.25rem;
}

.btn-primary {
    background: var(--gradient-rose);
    color: white;
    box-shadow: 0 4px 15px rgba(244, 63, 94, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(244, 63, 94, 0.6);
}

.btn-store {
    background: var(--glass-bg);
    color: var(--text-light);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: var(--glass-shadow);
}

.btn-store:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

/* Section styling */
section {
    padding: 8rem 2rem;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 4rem;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff 40%, var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--gradient-rose);
    margin: 1.5rem auto 0;
    border-radius: 2px;
}

/* Emotion / Intro Section */
.emotion-intro {
    background: linear-gradient(to bottom, rgba(5,20,22,0.8) 0%, rgba(12,41,44,0.4) 100%);
    border-top: 1px solid var(--glass-border);
}

.emotion-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.emotion-text h3 {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 1.5rem;
    color: var(--text-light);
}

.emotion-text p {
    color: var(--text-muted);
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.emotion-text p strong {
    color: var(--text-light);
    font-weight: 600;
}

.emotion-card-wrapper {
    position: relative;
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--glass-shadow);
}

.emotion-card-wrapper::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: radial-gradient(circle, rgba(244,63,94,0.1) 0%, transparent 60%);
    z-index: -1;
    pointer-events: none;
}

.emotion-card-wrapper img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 35px rgba(0, 0, 0, 0.4);
}

/* Features Grid */
.features {
    background: transparent;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.feature-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-8px);
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: 0 15px 40px rgba(0,0,0,0.4), 0 0 15px rgba(15, 90, 96, 0.2);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    background: rgba(15, 90, 96, 0.2);
    border: 1px solid rgba(15, 90, 96, 0.3);
    color: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    margin: 0 auto 2rem;
    transition: var(--transition);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}

.feature-card:hover .icon-wrapper {
    background: var(--gradient-rose);
    border-color: transparent;
    color: white;
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(244, 63, 94, 0.3);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.feature-card h4 {
    font-size: 0.85rem;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.feature-lead {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent-light);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Screenshot Showcase (Slider/Tabs) */
.showcase {
    background: linear-gradient(to bottom, rgba(12,41,44,0.4) 0%, rgba(5,20,22,0.9) 100%);
    border-top: 1px solid var(--glass-border);
}

.showcase-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 4rem;
    align-items: center;
}

.showcase-menu {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.showcase-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 1.2rem 1.8rem;
    border-radius: 16px;
    color: var(--text-muted);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.showcase-btn i {
    font-size: 1.3rem;
    transition: var(--transition);
}

.showcase-btn span {
    font-weight: 600;
    font-size: 1.05rem;
}

.showcase-btn:hover {
    background: var(--glass-bg-hover);
    color: var(--text-light);
    border-color: var(--glass-border-hover);
}

.showcase-btn.active {
    background: var(--gradient-beachlog);
    color: white;
    border-color: transparent;
    box-shadow: 0 8px 25px rgba(15, 90, 96, 0.4);
}

.showcase-btn.active i {
    color: white;
}

.showcase-display {
    position: relative;
    background: rgba(5, 20, 22, 0.5);
    border: 1px solid var(--glass-border);
    border-radius: 32px;
    padding: 2.5rem;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: var(--glass-shadow);
    min-height: 580px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.showcase-pane {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: center;
    width: 100%;
    animation: fadeIn 0.5s ease-out forwards;
}

.showcase-pane.active {
    display: grid;
}

.showcase-img-side {
    display: flex;
    justify-content: center;
    position: relative;
}

.showcase-img-side::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(15,90,96,0.3) 0%, transparent 70%);
    z-index: -1;
    top: 10%;
    left: 10%;
}

.showcase-img-side img {
    max-width: 100%;
    max-height: 500px;
    height: auto;
    object-fit: contain;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
}

.showcase-text-side h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.showcase-text-side p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.showcase-text-side ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.showcase-text-side li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 0.8rem;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
}

.showcase-text-side li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    color: var(--accent-color);
}

/* Guidelines (Legal & Ethics Section) */
.rules-guidelines {
    background: transparent;
    border-top: 1px solid var(--glass-border);
}

.rules-card {
    background: linear-gradient(135deg, rgba(244, 63, 94, 0.05) 0%, rgba(15, 90, 96, 0.08) 100%);
    border: 1px solid rgba(244, 63, 94, 0.2);
    border-radius: 30px;
    padding: 4rem;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    box-shadow: var(--glass-shadow);
}

.rules-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.rules-header i {
    font-size: 3rem;
    color: var(--accent-color);
}

.rules-header h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin: 0;
    background: linear-gradient(135deg, #fff 50%, var(--accent-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.rules-lead {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1.5rem;
}

.rules-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.rules-col h3 {
    font-size: 1.35rem;
    color: var(--accent-light);
    margin-bottom: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.rules-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rules-col li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 1.2rem;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.rules-col li strong {
    color: var(--text-light);
    font-weight: 600;
}

.rules-col li::before {
    content: '\f05a';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 4px;
    color: var(--primary-light);
}

.rules-col.legal li::before {
    color: var(--accent-color);
}

/* Bottom CTA styling */
.bottom-cta {
    background: linear-gradient(to top, #051416 0%, rgba(12,41,44,0.9) 100%);
    border-top: 1px solid var(--glass-border);
    text-align: center;
    padding: 8rem 2rem;
}

.bottom-cta h2 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 50%, var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bottom-cta p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 3.5rem;
}

.contact-info {
    margin-top: 4rem;
    border-top: 1px dashed var(--glass-border);
    padding-top: 2rem;
    display: inline-block;
}

.contact-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--text-light);
}

.contact-info p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.contact-info a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}

.contact-info a:hover {
    color: var(--accent-light);
    text-decoration: underline;
}

/* Subpage Containers (Privacy, Release Notes) */
.subpage-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 8rem 2rem;
    min-height: 80vh;
}

.subpage-container h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 2.5rem;
    background: linear-gradient(135deg, #fff 60%, var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 1rem;
}

.subpage-container h3 {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.subpage-container p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.subpage-container ul {
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.subpage-container li {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 0.8rem;
}

.subpage-container strong {
    color: var(--text-light);
}

.subpage-container a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition);
}

.subpage-container a:hover {
    color: var(--accent-light);
    text-decoration: underline;
}

/* Privacy legal block */
.legal-disclaimer-box {
    background: rgba(244, 63, 94, 0.05);
    border: 1px solid rgba(244, 63, 94, 0.2);
    border-radius: 16px;
    padding: 2rem;
    margin: 2.5rem 0;
}

.legal-disclaimer-box h4 {
    color: var(--accent-light);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    font-weight: 700;
}

.legal-disclaimer-box p {
    margin-bottom: 0;
    font-size: 1rem;
    line-height: 1.7;
}

/* Release Notes Timeline */
.release-notes-container {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.release-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

.release-item:hover {
    transform: translateY(-5px);
    border-color: var(--glass-border-hover);
    background: var(--glass-bg-hover);
}

.release-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--glass-border);
    padding-bottom: 1.2rem;
    margin-bottom: 2rem;
}

.release-version {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.release-version i {
    color: var(--primary-light);
}

.release-version .badge-major {
    background: var(--gradient-rose);
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 30px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: white;
}

.release-date {
    font-size: 0.95rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
    padding: 6px 16px;
    border-radius: 30px;
}

.release-content h3 {
    margin-top: 0;
    font-size: 1.4rem;
    color: var(--text-light);
}

.release-content h4 {
    font-size: 1.1rem;
    color: var(--primary-light);
    margin-top: 1.8rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
}

.release-content ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.release-content li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 0.8rem;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.release-content li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 2px;
    color: var(--accent-light);
    font-size: 1rem;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Footer styling */
footer {
    background: #051416 !important;
    border-top: 1px solid var(--glass-border);
    margin-top: 0 !important;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem 1.5rem;
    }
    
    .back-to-portal {
        position: absolute;
        top: 1.2rem;
        left: 1.5rem;
    }
    
    .logo {
        margin-top: 2rem;
        width: 100%;
        justify-content: flex-start;
    }
    
    .mobile-menu-toggle {
        display: block;
        position: absolute;
        right: 1.5rem;
        top: 2.2rem;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(5, 20, 22, 0.98);
        display: flex;
        justify-content: center;
        align-items: center;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 150;
    }
    
    .main-nav.active {
        opacity: 1;
        visibility: visible;
    }
    
    nav .tabs {
        flex-direction: column;
        align-items: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    section {
        padding: 5rem 1.5rem;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 2.5rem;
    }
    
    .emotion-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .showcase-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .showcase-display {
        min-height: auto;
        padding: 1.5rem;
    }
    
    .showcase-pane {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .showcase-img-side img {
        max-height: 380px;
    }
    
    .rules-card {
        padding: 2rem 1.5rem;
    }
    
    .rules-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .bottom-cta h2 {
        font-size: 2.2rem;
    }
    
    .subpage-container {
        padding: 6rem 1.5rem;
    }
    
    .subpage-container h2 {
        font-size: 2rem;
    }
    
    .release-item {
        padding: 1.8rem;
    }
    
    .release-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.8rem;
    }
}