:root {
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --card-bg: #1e293b;
    --card-hover-bg: #334155;
    --border-color: #334155;
    --accent-color: #38bdf8;
    --btn-dl: #38bdf8;
    --heart-color: #f43f5e;
    --focus-ring: 0 0 0 3px rgba(56, 189, 248, 0.5);
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #0f172a;
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    padding-bottom: 120px;
    overflow-x: hidden;
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-color: var(--accent-color);
}

header {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1, header .logo {
    margin: 0;
    font-size: 1.3rem;
    font-weight: bold;
}

header h1 a, header .logo a {
    color: var(--text-primary);
    text-decoration: none;
}

header nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

header nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

header nav a:hover {
    color: var(--accent-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.hero-section {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95)), 
                radial-gradient(circle at top right, rgba(56, 189, 248, 0.15), transparent 50%);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 16px;
    padding: 50px 30px;
    margin-bottom: 40px;
    text-align: center;
    box-shadow: 0 20px 40px -15px rgba(0,0,0,0.5);
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(to right, #f8fafc, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 24px auto;
    line-height: 1.8;
}

/* 🔍 検索・ソートコントロール */
.search-toolbar {
    max-width: 700px;
    margin: 0 auto 30px auto;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.search-container {
    flex: 1;
    min-width: 280px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 14px 20px;
    padding-left: 45px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.3);
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.1rem;
    pointer-events: none;
}

.sort-select {
    padding: 14px 20px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

.sort-select:focus {
    border-color: var(--accent-color);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-left: 10px;
    border-left: 4px solid var(--accent-color);
}

.scroll-section-container {
    margin-bottom: 50px;
}
.scroll-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 16px;
}
.scroll-container {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding: 8px 4px 16px 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}
.scroll-container::-webkit-scrollbar {
    height: 6px;
}
.scroll-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

/* 🖼️ ギャラリーカード */
.material-card, .scroll-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.25s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.scroll-card {
    flex: 0 0 260px;
    justify-content: flex-start;
}

.material-card:hover, .scroll-card:hover {
    background: var(--card-hover-bg);
    border-color: rgba(56, 189, 248, 0.4);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.5);
}

.material-card:active, .scroll-card:active {
    transform: translateY(-1px);
}

.card-thumbnail-wrap {
    width: 100%;
    height: 160px;
    background: #0b0f19;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.card-thumbnail-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.material-card:hover .card-thumbnail-wrap img, .scroll-card:hover .card-thumbnail-wrap img {
    transform: scale(1.05);
}

.card-info {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    justify-content: space-between;
}

.card-header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.card-header-tag {
    background: #38bdf8;
    color: #0f172a;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: bold;
}

.fav-btn {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: transform 0.2s, color 0.2s;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fav-btn.active {
    color: var(--heart-color);
}

.fav-btn:hover {
    transform: scale(1.2);
}

.material-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.material-title {
    margin: 6px 0 4px 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
    max-height: 2.8em;
}

.material-tags {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 50px;
}
.info-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}
.info-box h3 {
    margin-top: 0;
    color: var(--accent-color);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}
.info-box p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.6;
}

/* 🎵 プレイヤーバー */
.sticky-player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to bottom, #1e293b, #0f172a);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(56, 189, 248, 0.4);
    padding: 16px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 -15px 35px rgba(0,0,0,0.7);
    z-index: 1000;
    gap: 15px;
}

.player-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 200px;
    text-align: left;
}

.player-title {
    font-size: 1rem;
    font-weight: bold;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 240px;
}

.player-category {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.player-controls-group {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    max-width: 700px;
    justify-content: center;
}

.wmp-btn {
    background: #334155;
    color: #38bdf8;
    border: 1px solid #475569;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: bold;
    transition: all 0.2s;
    flex-shrink: 0;
}

.wmp-btn.main-play {
    width: 40px;
    height: 40px;
    font-size: 0.95rem;
    background: #0ea5e9;
    color: #fff;
    border-color: #38bdf8;
}

.wmp-btn.active-loop {
    background: #38bdf8;
    color: #0f172a;
    border-color: #fff;
}

.wmp-btn:hover {
    background: #38bdf8;
    color: #0f172a;
    border-color: #38bdf8;
    transform: scale(1.05);
}

.progress-container {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 10px;
}

.progress-bar {
    flex: 1;
    height: 12px;
    background: #111827;
    border: 1px solid #334155;
    border-radius: 6px;
    position: relative;
    cursor: pointer;
    overflow: hidden;
    background-image: repeating-linear-gradient(90deg, #334155, #334155 2px, transparent 2px, transparent 6px);
}

.progress-filled {
    height: 100%;
    background: linear-gradient(to right, #0ea5e9, #38bdf8);
    width: 0%;
    border-radius: 4px;
    pointer-events: none;
}

.time-display {
    font-size: 0.75rem;
    color: var(--text-secondary);
    min-width: 35px;
    text-align: center;
}

.volume-container {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 10px;
}

.volume-slider {
    width: 80px;
    height: 6px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.player-action {
    display: flex;
    align-items: center;
    min-width: 170px;
    justify-content: flex-end;
}

.action-btn {
    background: linear-gradient(to bottom, #2ea44f, #2c974b);
    color: #fff;
    border: none;
    padding: 8px 14px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 0.8rem;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    transition: filter 0.2s, transform 0.2s;
    white-space: nowrap;
}

.action-btn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    header {
        padding: 15px 20px;
        flex-direction: column;
        gap: 10px;
    }
    body {
        padding-bottom: 140px;
    }
    .sticky-player-bar {
        flex-direction: column;
        align-items: stretch;
        padding: 10px 15px;
        gap: 8px;
    }
    .player-controls-group {
        justify-content: space-between;
    }
    .hero-title {
        font-size: 1.7rem;
    }
}

footer {
    margin-top: 80px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    padding-bottom: 40px;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
}
footer a:hover {
    color: var(--accent-color);
}