:root {
    --color-bg: #fdf7ec;
    --color-surface: #fffaf5;
    --color-border: #ead9b2;
    --color-primary: #c89b3c;
    --color-primary-dark: #9f7421;
    --color-primary-rgb: 200, 155, 60;
    --color-accent: #f5d772;
    --color-text: #1b1b1b;
    --color-muted: #7a6a4a;
    --shadow-soft: 0 14px 28px rgba(88, 63, 24, 0.08);
    --radius-lg: 18px;
    --radius-md: 12px;
    --transition-fast: 0.18s ease-in-out;
    font-size: 16px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Inter', 'Noto Sans JP', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1120px, 92vw);
    margin: 0 auto;
}

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(8px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.1rem 0;
    gap: 1.5rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.brand-mark {
    background: var(--color-primary);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 1.4rem;
}

.brand-name {
    font-weight: 600;
    font-size: 1.15rem;
}

.brand-tagline {
    display: block;
    color: var(--color-muted);
    font-size: 0.85rem;
}

.site-nav {
    display: flex;
    gap: 1.25rem;
    font-size: 0.95rem;
}

.site-nav a {
    position: relative;
    padding-bottom: 0.2rem;
}

.site-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-fast);
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
    width: 100%;
}

.hero {
    background: linear-gradient(0deg, rgba(43, 28, 7, 0.68), rgba(43, 28, 7, 0.68)),
        url('https://page.gensparksite.com/v1/base64_upload/5edc58f3c9b001f5e80232fde7cb60c3') center/cover no-repeat;
    padding: 5.5rem 0 4rem;
    color: #fff7e0;
}

.hero-inner {
    display: grid;
    gap: 1.5rem;
}

.hero-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.3;
    margin: 0;
    color: #fffdf5;
}

.hero-description {
    margin: 0;
    max-width: 680px;
    font-size: 1.05rem;
    color: #fbead0;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button {
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.primary-button {

    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 12px 22px rgba(var(--color-primary-rgb), 0.22);
}

.primary-button:hover,
.primary-button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 16px 28px rgba(var(--color-primary-rgb), 0.28);
}

.secondary-button {
    background: rgba(255, 233, 190, 0.22);
    color: #fff;
}

.secondary-button:hover,
.secondary-button:focus-visible {
    transform: translateY(-1px);
    background: rgba(255, 233, 190, 0.3);
}

.filters {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.filters-inner {
    display: flex;
    gap: 1.5rem;
    align-items: flex-end;
    padding: 1.4rem 0;
    flex-wrap: wrap;
}

.search-field,
.select-field {
    display: grid;
    gap: 0.35rem;
    font-size: 0.85rem;
    color: var(--color-muted);
    min-width: 160px;
}

.search-field input,
.select-field select {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.65rem 0.8rem;
    font-size: 0.95rem;
    background: #fff;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-field input:focus-visible,
.select-field select:focus-visible {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.2);
    outline: none;
}

.track-grid-section {
    padding-block: 3.5rem;
}

.track-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1.8rem;
}

.empty-state {
    grid-column: 1 / -1;
}

.empty-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    padding: 2.5rem;
    text-align: center;
    color: var(--color-muted);
    display: grid;
    gap: 0.75rem;
}

.empty-card .empty-sub {
    font-size: 0.9rem;
}

.track-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.track-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    background: #e6d8b6;
    overflow: hidden;
}

.track-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.track-content {
    padding: 1.4rem;
    display: grid;
    gap: 1rem;
}

.track-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
}

.track-title {
    margin: 0 0 0.35rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.track-meta {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.85rem;
}

.track-duration {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
}

.track-description {
    margin: 0;
    color: #3c3f41;
    font-size: 0.92rem;
}

.track-tags {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.track-tags li {
    background: rgba(var(--color-primary-rgb), 0.16);
    color: var(--color-primary);
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    font-size: 0.78rem;
    letter-spacing: 0.03em;
}

.track-player {
    display: grid;
    gap: 0.75rem;
}

.player-button {
    border: none;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md);
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.player-button:hover,
.player-button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 10px 22px rgba(var(--color-primary-rgb), 0.28);
    outline: none;
}

.player-button.secondary {
    background: rgba(var(--color-primary-rgb), 0.16);
    color: var(--color-primary);
    box-shadow: none;
}

.player-button.secondary:hover,
.player-button.secondary:focus-visible {
    background: rgba(var(--color-primary-rgb), 0.22);
}

.player-button.play {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.2rem;
    box-shadow: 0 16px 30px rgba(var(--color-primary-rgb), 0.32);
}

.player-button.paused .icon {
    transform: translateX(1px);
}

.player-button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.timeline {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.75rem;
    align-items: center;
}

.timeline .current-time,
.timeline .total-time {
    font-variant-numeric: tabular-nums;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.progress {
    position: relative;
    height: 6px;
    border-radius: 999px;
    background: rgba(var(--color-primary-rgb), 0.15);
    cursor: pointer;
}

.progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    background: var(--color-primary);
    border-radius: inherit;
    transition: width 0.1s linear;
}

.player-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.player-actions .player-button {
    background: rgba(var(--color-primary-rgb), 0.16);
    color: var(--color-primary);
    box-shadow: none;
}

.player-actions .player-button:hover,
.player-actions .player-button:focus-visible {
    background: rgba(var(--color-primary-rgb), 0.22);
}

.speed-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--color-muted);
}

.speed-select {
    border: 1px solid var(--color-border);
    border-radius: 999px;
    padding: 0.35rem 0.9rem;
    font-size: 0.82rem;
    background: #fff;
    color: var(--color-primary);
    cursor: pointer;
}

.about {
    padding: 4rem 0;
    background: var(--color-surface);
}

.about-inner {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.about-highlight {
    background: linear-gradient(145deg, rgba(var(--color-primary-rgb), 0.12), rgba(var(--color-primary-rgb), 0.28));
    border-radius: var(--radius-lg);
    padding: 1.8rem;
}

.about-highlight h3 {
    margin-top: 0;
}

.about-highlight ul {
    padding-left: 1.2rem;
    margin-bottom: 30px;
    display: grid;
    gap: 0.7rem;
}

.ticket {
    margin: 0;
    font-weight: bold;
}

.contact {
    padding: 3.8rem 0 4.5rem;
    background: linear-gradient(145deg, #c89b3c, #9f7421);
    color: #fff;
    text-align: center;
}

.contact .primary-button {
    margin-top: 1.5rem;
    background: #fffaf0;
    color: var(--color-primary-dark);
    box-shadow: none;
}

.contact .primary-button:hover,
.contact .primary-button:focus-visible {
    background: #f5e4bd;
}

.site-footer {
    background: #2b1c07;
    color: rgba(255, 245, 225, 0.78);
    padding: 1.8rem 0;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links {
    display: flex;
    gap: 1.25rem;
    font-size: 0.85rem;
}

.footer-links a {
    color: rgba(255, 245, 225, 0.78);
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: #ffe7a3;
}

@media (max-width: 720px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-nav {
        width: 100%;
        justify-content: space-between;
    }

    .filters-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .track-head {
        flex-direction: column;
        gap: 0.25rem;
    }

    .timeline {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .timeline .current-time,
    .timeline .total-time {
        display: inline-block;
    }

    .timeline::before {
        content: attr(data-mobile-time);
    }

    .player-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .player-actions .player-button {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .brand {
        gap: 0.6rem;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
        font-size: 1.2rem;
    }

    .track-card {
        border-radius: var(--radius-md);
    }

    .track-cover {
        min-height: 140px;
    }
}
