:root {
    color-scheme: dark;
    --ink: #f0edf6;
    --muted: #9c9aae;
    --paper: #0e0f17;
    --surface: #141624;
    --surface-card: #181b2c;
    --accent: #8f84b8;
    --accent-light: #a89cd4;
    --pink-accent: #d68090;
    --line: rgba(168, 155, 212, .14);
    --serif: "Yu Mincho", "游明朝", "Hiragino Mincho ProN", "Noto Serif JP", Georgia, serif;
    font-family: "Yu Gothic Medium", "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Meiryo", "Noto Sans JP", sans-serif;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    padding-bottom: 102px;
    background:
        radial-gradient(ellipse at 85% 2%, rgba(88, 70, 118, .22), transparent 42%),
        radial-gradient(ellipse at 12% 88%, rgba(55, 68, 105, .18), transparent 48%),
        var(--paper);
    color: var(--ink);
    letter-spacing: .04em;
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* Site Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 72px;
    padding: 0 6%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    background: rgba(14, 15, 23, .9);
    backdrop-filter: blur(14px);
}
.header-left { display: flex; align-items: center; gap: 40px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: #f2edf9; font-size: 18px; font-weight: 700; letter-spacing: .12em; }
.brand-mark {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(168, 155, 212, .4);
    background: linear-gradient(135deg, #2b243a, #1a1928);
    color: var(--accent-light);
    font-family: var(--serif);
    font-size: 16px;
    box-shadow: 0 0 12px rgba(143, 132, 184, .25);
}
.brand-text small { display: block; font-size: 8px; color: var(--muted); letter-spacing: .18em; font-weight: 400; line-height: 1; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.nav-link { padding: 24px 0 22px; color: #9593a8; font-size: 13px; font-weight: 500; transition: color .2s ease; }
.nav-link.is-active { color: #f2edf9; border-bottom: 2px solid var(--accent); }
.nav-link:hover { color: #d0c8e8; }

.adult-badge {
    padding: 5px 10px;
    border: 1px solid rgba(214, 128, 144, .45);
    border-radius: 3px;
    background: rgba(214, 128, 144, .08);
    color: #e8a2af;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: .12em;
}

/* Magazine Hero Section */
.hero-magazine {
    position: relative;
    padding: 60px 6% 64px;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(ellipse at 15% 70%, rgba(95, 75, 128, .2), transparent 50%),
        linear-gradient(180deg, rgba(20, 22, 36, .5), rgba(14, 15, 23, .9));
}
.hero-content {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    align-items: center;
    gap: 40px;
    position: relative;
}
.hero-tag { display: inline-flex; align-items: center; gap: 8px; color: #a4a0ba; font-size: 10px; font-weight: 700; letter-spacing: .22em; margin-bottom: 16px; }
.tag-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--pink-accent); box-shadow: 0 0 10px rgba(214, 128, 144, .6); }
.hero-title {
    margin: 0 0 18px;
    color: #f4f0f9;
    font-family: var(--serif);
    font-size: clamp(34px, 4vw, 54px);
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: .08em;
}
.title-sub { font-size: .6em; color: var(--muted); display: block; margin-bottom: 4px; font-family: var(--serif); }
.title-highlight { color: var(--accent-light); }
.hero-lead { color: #a6a3b8; font-size: 13px; line-height: 2.1; margin: 0 0 28px; max-width: 500px; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 13px 28px;
    border-radius: 30px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    color: #0e0f17;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .08em;
    box-shadow: 0 6px 20px rgba(143, 132, 184, .3);
    transition: transform .2s ease, box-shadow .2s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(143, 132, 184, .45); }
.btn-primary .arrow { font-size: 15px; }

/* Visual Preview Card in Hero */
.hero-visual-col { position: relative; display: flex; justify-content: center; }
.hero-card-preview {
    position: relative;
    width: 100%;
    max-width: 380px;
    padding: 24px;
    border-radius: 12px;
    border: 1px solid rgba(168, 155, 212, .25);
    background: linear-gradient(145deg, rgba(32, 34, 52, .85), rgba(18, 19, 30, .95));
    box-shadow: 0 20px 50px rgba(0, 0, 0, .45);
}
.hero-moon-glow {
    position: absolute;
    top: -30px;
    right: -30px;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(200, 185, 230, .25), transparent 70%);
    pointer-events: none;
}
.preview-label {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 2px;
    background: rgba(214, 128, 144, .2);
    color: #ea9ea9;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .15em;
    margin-bottom: 14px;
}
.preview-art {
    height: 140px;
    border-radius: 6px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #2b233c, #48395e 60%, #1e1e32);
    margin-bottom: 16px;
    border: 1px solid rgba(168, 155, 212, .2);
}
.art-kanji { font-family: var(--serif); font-size: 48px; color: rgba(220, 208, 242, .4); }
.preview-category { font-size: 10px; color: var(--accent-light); letter-spacing: .08em; display: block; margin-bottom: 4px; }
.preview-info h3 { margin: 0 0 6px; font-size: 16px; font-family: var(--serif); color: #f4f0f9; }
.preview-info p { margin: 0; font-size: 11px; color: var(--muted); }

.hero-vertical-badge {
    position: absolute;
    right: -2%;
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    color: rgba(168, 155, 212, .25);
    font-family: var(--serif);
    font-size: 14px;
    letter-spacing: .4em;
    pointer-events: none;
}

/* 2-Column Sidebar Layout */
.section-wrap { padding: 48px 6% 64px; }
.layout-grid {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 270px 1fr;
    gap: 40px;
    align-items: start;
}

/* Sidebar Styling */
.sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 96px;
}
.widget {
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--line);
    background: var(--surface);
}
.widget-title {
    margin: 0 0 16px;
    font-size: 13px;
    font-weight: 700;
    color: #f0edf6;
    letter-spacing: .08em;
    display: flex;
    align-items: center;
    gap: 8px;
}
.widget-title::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 14px;
    border-radius: 2px;
    background: var(--accent);
}

/* Search Form Widget */
.search-input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
    height: 38px;
    border: 1px solid rgba(168, 155, 212, .2);
    border-radius: 4px;
    background: #10121e;
    margin-bottom: 10px;
}
.search-icon { color: var(--accent); font-size: 18px; }
.search-input-wrap input {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--ink);
    font-size: 12px;
}
.search-input-wrap input::placeholder { color: #626075; }
.btn-search {
    width: 100%;
    height: 34px;
    border: 0;
    border-radius: 4px;
    background: var(--accent);
    color: #0e0f17;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    transition: background .2s ease;
}
.btn-search:hover { background: var(--accent-light); }

/* Category Navigation Widget */
.category-nav { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
.category-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    border-radius: 4px;
    color: #a4a0b8;
    font-size: 12px;
    transition: all .2s ease;
}
.category-link:hover { background: rgba(168, 155, 212, .08); color: #f0edf6; }
.category-link.is-active { background: rgba(143, 132, 184, .2); color: var(--accent-light); font-weight: 600; border-left: 3px solid var(--accent); }
.count-pill {
    padding: 2px 7px;
    border-radius: 10px;
    background: rgba(168, 155, 212, .15);
    color: #a89cd4;
    font-size: 10px;
}

/* Notice Widget */
.notice-text { margin: 0; font-size: 11px; color: var(--muted); line-height: 1.8; }

/* Main Catalog Grid Area */
.catalog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 18px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
}
.catalog-title-wrap { display: flex; align-items: baseline; gap: 14px; }
.catalog-header h2 { margin: 0; font-family: var(--serif); font-size: 22px; font-weight: 400; color: #f4f0f9; }
.catalog-count { font-size: 11px; color: var(--muted); }
.btn-reset { font-size: 11px; color: var(--pink-accent); }

/* Track Cards Grid */
.track-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}
.track-card {
    min-width: 0;
    padding: 10px 10px 14px;
    border: 1px solid rgba(168, 155, 212, .12);
    border-radius: 6px;
    background: var(--surface-card);
    transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.track-card:hover {
    transform: translateY(-4px);
    border-color: rgba(168, 155, 212, .4);
    box-shadow: 0 12px 30px rgba(9, 10, 18, .5);
}

.cover-art { position: relative; height: 180px; overflow: hidden; border-radius: 4px; isolation: isolate; }
.art-rain { background: linear-gradient(135deg, #322b42, #534568 53%, #1f2235); }
.art-forest { background: linear-gradient(135deg, #283540, #526362 52%, #1a2228); }
.art-library { background: linear-gradient(135deg, #483445, #7a5568 52%, #2a202c); }
.art-ocean { background: linear-gradient(165deg, #222b40, #4c5a78 53%, #1b2133); }
.art-clay { background: linear-gradient(135deg, #452b37, #80515e 55%, #2b1f28); }
.art-train { background: linear-gradient(135deg, #1e2030, #4c4263 54%, #1a1a29); }

.art-index { position: absolute; top: 12px; left: 12px; color: rgba(235, 228, 248, .75); font-size: 9px; letter-spacing: .12em; }
.cover-category {
    position: absolute;
    bottom: 12px;
    left: 12px;
    padding: 3px 8px;
    border-radius: 2px;
    background: rgba(14, 15, 23, .82);
    color: var(--accent-light);
    font-size: 9px;
    border: 1px solid rgba(168, 155, 212, .25);
}
.cover-duration { position: absolute; right: 12px; bottom: 12px; color: #f2edf9; font-size: 9px; text-shadow: 0 1px 4px rgba(0,0,0,.6); }

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border: 1px solid rgba(168, 155, 212, .45);
    border-radius: 50%;
    background: rgba(22, 23, 36, .9);
    color: var(--accent-light);
    font-size: 13px;
    transform: translate(-50%, -50%);
    cursor: pointer;
    opacity: 0;
    transition: all .2s ease;
    box-shadow: 0 6px 20px rgba(0,0,0,.4);
}
.cover-art:hover .play-button, .play-button:focus-visible, .play-button:disabled { opacity: 1; }
.play-button:hover { background: var(--accent); color: #0e0f17; }
.play-button:disabled { color: #626075; cursor: not-allowed; border-color: rgba(100,95,120,.3); background: rgba(18,19,30,.8); }

.track-info { padding: 14px 2px 0; }
.track-title-row { display: flex; align-items: start; justify-content: space-between; gap: 10px; }
.title-meta h3 { margin: 0 0 6px; color: #f0edf6; font-size: 13px; font-weight: 600; letter-spacing: .02em; line-height: 1.4; }
.track-creator { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.5; }
.creator-label { color: #726f85; margin-right: 2px; }
.favorite-button { flex: 0 0 auto; padding: 0; border: 0; background: transparent; color: #78758a; font-size: 18px; line-height: 1; cursor: pointer; transition: color .2s ease; }
.favorite-button:hover, .favorite-button.is-favorite { color: var(--pink-accent); }
.track-description { min-height: 36px; margin: 10px 0 10px; color: var(--muted); font-size: 10px; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.tag-list { display: flex; gap: 6px; flex-wrap: wrap; }
.tag-item {
    padding: 2px 6px;
    border-radius: 2px;
    background: rgba(168, 155, 212, .1);
    color: var(--accent-light);
    font-size: 9px;
}
.tag-file { background: rgba(255, 255, 255, .04); color: #8a889b; }

/* Empty State */
.empty-state { padding: 60px 20px; text-align: center; color: var(--muted); }
.empty-icon { font-size: 28px; color: var(--accent); display: block; margin-bottom: 10px; }
.empty-state h3 { font-family: var(--serif); font-weight: 400; color: #f0edf6; margin: 0 0 8px; font-size: 18px; }
.empty-state p { font-size: 12px; margin: 0 0 16px; }
.btn-primary-sm { display: inline-block; padding: 8px 18px; border-radius: 20px; background: var(--accent); color: #0e0f17; font-size: 11px; font-weight: 700; }

/* Concept Quote Section */
.quote-section {
    padding: 64px 6%;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(ellipse at 50% 100%, rgba(85, 68, 115, .18), transparent 60%),
        #0e0f17;
}
.quote-card {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px;
    text-align: center;
    border-radius: 8px;
    border: 1px solid rgba(168, 155, 212, .15);
    background: rgba(20, 22, 36, .6);
}
.quote-section .eyebrow { color: var(--accent-light); margin-bottom: 16px; display: block; }
.quote-section blockquote { margin: 0 0 18px; color: #f0edf6; font-family: var(--serif); font-size: clamp(18px, 2.2vw, 24px); line-height: 2; letter-spacing: .08em; }
.quote-author { color: var(--muted); font-size: 11px; letter-spacing: .15em; }

/* Footer */
.site-footer {
    padding: 24px 6%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 11px;
}
.footer-left { display: flex; align-items: center; gap: 20px; }
.footer-brand { color: #f0edf6; }
.footer-note { font-size: 10px; color: #726f85; }

/* Audio Player Bar */
.player {
    position: fixed;
    z-index: 200;
    right: 0;
    bottom: 0;
    left: 0;
    min-height: 72px;
    padding: 10px 5%;
    display: grid;
    grid-template-columns: 1fr 1.35fr 1fr;
    align-items: center;
    gap: 30px;
    border-top: 1px solid rgba(168, 155, 212, .22);
    background: rgba(18, 19, 30, .96);
    box-shadow: 0 -8px 35px rgba(0, 0, 0, .45);
    backdrop-filter: blur(16px);
}
.player-track { display: flex; min-width: 0; align-items: center; gap: 12px; }
.player-thumb {
    display: grid;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    place-items: center;
    border-radius: 4px;
    border: 1px solid rgba(168, 155, 212, .28);
    background: linear-gradient(135deg, #322b44, #1b1c2b);
    color: var(--accent-light);
    font-family: var(--serif);
    font-size: 16px;
}
.player-track-copy { display: grid; min-width: 0; gap: 2px; }
.player-track-copy strong { color: #f0edf6; font-size: 11px; font-weight: 600; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }
.player-track-copy span { color: var(--muted); font-size: 9px; text-overflow: ellipsis; overflow: hidden; white-space: nowrap; }
.player-controls { display: flex; align-items: center; gap: 16px; }
.player-button {
    display: grid;
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    place-items: center;
    border: 0;
    border-radius: 50%;
    background: var(--accent);
    color: #0e0f17;
    font-size: 12px;
    cursor: pointer;
    transition: background .2s ease;
}
.player-button:hover { background: var(--accent-light); }
.player-button:disabled { background: #3d3b4e; color: #727084; cursor: default; }
.progress-wrap { display: grid; width: 100%; grid-template-columns: 32px 1fr 32px; align-items: center; gap: 8px; color: var(--muted); font-size: 9px; }
.progress-wrap input, .volume-control input { width: 100%; height: 3px; accent-color: var(--accent); cursor: pointer; }
.volume-control { display: flex; max-width: 120px; justify-self: end; align-items: center; gap: 10px; color: var(--accent-light); font-size: 11px; }
.volume-control input { width: 70px; }

/* Responsive layout adjustments */
@media (max-width: 1024px) {
    .layout-grid { grid-template-columns: 1fr; }
    .sidebar-panel { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .notice-widget { grid-column: span 2; }
    .track-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
    .site-header { height: 64px; padding: 0 4%; }
    .main-nav { display: none; }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero-lead { margin-left: auto; margin-right: auto; }
    .hero-visual-col { display: none; }
    .sidebar-panel { grid-template-columns: 1fr; }
    .notice-widget { grid-column: span 1; }
    .quote-card { padding: 24px 16px; }
    .player { padding: 10px 4%; gap: 12px; grid-template-columns: 1fr 1.2fr; }
    .volume-control { display: none; }
}

@media (max-width: 540px) {
    body { padding-bottom: 120px; }
    .hero-magazine { padding: 36px 5% 40px; }
    .hero-title { font-size: 30px; }
    .track-grid { grid-template-columns: 1fr; }
    .cover-art { height: 160px; }
    .site-footer { flex-direction: column; gap: 12px; text-align: center; }
    .footer-left { flex-direction: column; gap: 6px; }
    .player { grid-template-columns: 1fr; min-height: 84px; }
    .player-controls { position: absolute; top: 12px; right: 4%; width: 45%; justify-content: flex-end; }
    .progress-wrap { position: absolute; bottom: 8px; left: 4%; width: 92%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}