/* assets/music.css —— 在线音乐页面样式（任务92，neo-brutalist 风格延续：粗边框 / 硬阴影 / 网格背景） */

/* ===== 屏幕阅读辅助 ===== */
.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;
}

/* ===== 音乐页头部 ===== */
.music-header {
    grid-template-columns: 250px 1fr auto;
}

.music-head-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 2px solid var(--line);
}

.music-head-tag {
    padding: 8px 14px;
    border: 2px solid var(--line);
    background: #fff;
    box-shadow: 3px 3px 0 var(--line);
    font-family: Consolas, monospace;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .14em;
    color: var(--muted);
    transform: rotate(-1deg);
}

.music-home-link {
    padding: 0 22px;
    display: flex;
    align-items: center;
    gap: 6px;
    border: 0;
    border-left: 2px solid var(--line);
    background: var(--orange);
    font-weight: 900;
    font-size: 14px;
    color: var(--ink);
    text-decoration: none;
    transition: background .16s ease;
}

.music-home-link:hover {
    background: var(--blue);
    color: #fff;
}

.music-home-link:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: -3px;
}

/* ===== 页面标题区 ===== */
.music-hero {
    border-bottom: 2px solid var(--line);
    background: var(--paper);
}

.music-hero-copy {
    padding: clamp(32px, 5vw, 64px) clamp(20px, 5vw, 64px);
    position: relative;
    overflow: hidden;
}

.music-hero-copy::after {
    content: "MUSIC";
    position: absolute;
    right: -40px;
    bottom: 20px;
    color: rgba(17, 17, 17, .045);
    font-family: Impact, "Arial Black", sans-serif;
    font-size: clamp(60px, 9vw, 130px);
    line-height: .8;
    letter-spacing: .02em;
    transform: rotate(-90deg);
    transform-origin: right bottom;
    pointer-events: none;
}

.music-hero-copy h1 {
    margin: 0 0 12px;
    font-family: Impact, "Arial Black", "Microsoft YaHei", sans-serif;
    font-size: clamp(42px, 6vw, 80px);
    font-weight: 900;
    line-height: .95;
    letter-spacing: -.03em;
}

.music-hero-intro {
    margin: 0;
    max-width: 600px;
    font-size: 16px;
    line-height: 1.7;
    color: #34322e;
}

/* 公告提示条 */
.music-notice {
    margin-top: 20px;
    max-width: 660px;
    padding: 10px 16px;
    border: 2px solid var(--line);
    background: #fff8e1;
    box-shadow: 4px 4px 0 var(--line);
    font-size: 13px;
    font-weight: 700;
    color: #8a5a00;
    line-height: 1.6;
}

/* ===== 搜索工具栏 ===== */
.music-toolbar {
    padding: 20px clamp(20px, 4vw, 64px) 0;
}

.music-search {
    width: min(100%, 560px);
}

.music-search-control {
    height: 52px;
    grid-template-columns: 1fr auto;
}

.music-search-btn {
    padding: 0 20px;
    border: 0;
    border-left: 2px solid var(--line);
    background: var(--blue);
    color: #fff;
    font-weight: 900;
    font-size: 14px;
    cursor: pointer;
    transition: background .16s ease;
}

.music-search-btn:hover {
    background: var(--ink);
}

.music-search-btn:focus-visible {
    outline: 3px solid var(--orange);
    outline-offset: -3px;
}

/* ===== 分类筛选条 ===== */
.music-categories {
    padding: 16px clamp(20px, 4vw, 64px) 0;
}

.music-category-strip {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.music-category-strip::-webkit-scrollbar {
    height: 4px;
}

.music-category-strip::-webkit-scrollbar-thumb {
    background: var(--line);
}

.music-category-btn {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 8px 16px;
    border: 2px solid var(--line);
    background: var(--card);
    box-shadow: 3px 3px 0 var(--line);
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    white-space: nowrap;
    transition: transform .14s ease, box-shadow .14s ease, background .14s ease, color .14s ease;
}

.music-category-btn:hover {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0 var(--line);
}

.music-category-btn:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

.music-category-btn.is-active {
    color: #fff;
    background: var(--ink);
    box-shadow: 3px 3px 0 var(--blue);
}

/* ===== 状态提示 ===== */
.music-status {
    min-height: 0;
    margin-top: 12px;
    padding: 0 clamp(20px, 4vw, 64px);
    font-family: Consolas, monospace;
    font-size: 12px;
    color: var(--muted);
}

.music-status:empty {
    display: none;
}

/* ===== 首页榜单 ===== */
.music-home-sections {
    padding: 18px clamp(20px, 4vw, 64px) 0;
    display: flex;
    flex-direction: column;
    gap: 26px;
}

.music-section-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--line);
}

.music-section-head h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 900;
}

.music-section-head small {
    font-size: 9px;
    letter-spacing: .15em;
    color: var(--muted);
}

.music-section-list {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
}

/* ===== 曲目网格 ===== */
.music-grid-wrap {
    padding: 20px clamp(20px, 4vw, 64px) 40px;
}

.music-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
}

/* ===== 曲目卡片 ===== */
.music-card {
    display: flex;
    flex-direction: column;
    border: 2px solid var(--line);
    background: var(--card);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform .18s ease, box-shadow .18s ease;
}

.music-card:hover {
    transform: translate(3px, 3px);
    box-shadow: 4px 4px 0 var(--line);
}

.music-card:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

.music-card[hidden] {
    display: none;
}

.music-card.is-current {
    box-shadow: 4px 4px 0 var(--blue);
}

.music-card.is-current .music-card-cover {
    outline: 3px solid var(--blue);
    outline-offset: -3px;
}

.music-card-cover {
    position: relative;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--paper-dark);
}

.music-card-cover img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform .3s ease;
}

.music-card:hover .music-card-cover img {
    transform: scale(1.04);
}

.music-card-placeholder {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background: repeating-linear-gradient(
        -45deg,
        var(--paper-dark),
        var(--paper-dark) 10px,
        #dcd6c6 10px,
        #dcd6c6 20px
    );
    color: var(--muted);
    font-size: 32px;
    font-weight: 900;
}

.music-card-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px 14px;
}

.music-card-title {
    margin: 0;
    font-size: 14px;
    font-weight: 900;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.music-card-artist {
    font-size: 12px;
    font-weight: 700;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.music-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.music-card-meta span {
    padding: 2px 6px;
    border: 1px solid rgba(17, 17, 17, .35);
    font-size: 10px;
    font-weight: 700;
    color: var(--muted);
}

.music-card-meta .music-meta-plays {
    font-family: Consolas, monospace;
}

.music-play-btn {
    margin-top: auto;
    min-height: 42px;
    border: 2px solid var(--line);
    background: var(--orange);
    box-shadow: 3px 3px 0 var(--line);
    font-size: 13px;
    font-weight: 900;
    cursor: pointer;
    transition: transform .14s ease, box-shadow .14s ease, opacity .14s ease;
}

.music-play-btn:hover:not(:disabled) {
    transform: translate(-1px, -1px);
    box-shadow: 4px 4px 0 var(--line);
}

.music-play-btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--line);
}

.music-play-btn:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

.music-play-btn.is-playing {
    background: var(--ink);
    color: #fff;
}

/* ===== 加载更多 ===== */
.music-more-wrap {
    display: flex;
    justify-content: center;
    padding: 0 clamp(20px, 4vw, 64px) 48px;
}

.music-more-wrap[hidden],
.music-more-wrap:empty {
    display: none;
}

.music-more-btn {
    min-width: 240px;
    min-height: 48px;
    padding: 10px 24px;
    border: 2px solid var(--line);
    background: var(--card);
    box-shadow: 4px 4px 0 var(--line);
    font-size: 14px;
    font-weight: 900;
    cursor: pointer;
    transition: transform .14s ease, box-shadow .14s ease;
}

.music-more-btn:hover:not(:disabled) {
    transform: translate(-1px, -1px);
    box-shadow: 5px 5px 0 var(--line);
}

.music-more-btn:disabled {
    opacity: .55;
    cursor: wait;
}

.music-more-btn[data-state="done"] {
    opacity: .6;
    cursor: default;
    background: var(--paper-dark);
    box-shadow: none;
}

.music-more-btn[data-state="error"] {
    background: #fff0f0;
    border-color: #e50914;
    color: #e50914;
    cursor: pointer;
}

.music-more-btn:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

/* ===== 加载状态 ===== */
.music-loading {
    padding: 60px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--muted);
    font-size: 14px;
}

.music-loading[hidden] {
    display: none !important;
}

.music-loading-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--paper-dark);
    border-top-color: var(--blue);
    border-radius: 50%;
    animation: music-spin .8s linear infinite;
}

@keyframes music-spin {
    to { transform: rotate(360deg); }
}

/* ===== 空/错误状态 ===== */
.music-empty,
.music-error {
    margin: 40px clamp(20px, 4vw, 64px);
    padding: 60px 25px;
    border: 2px dashed var(--line);
    text-align: center;
}

.music-empty[hidden],
.music-error[hidden] {
    display: none !important;
}

.music-empty span,
.music-error span {
    color: var(--blue);
    font-family: Consolas, monospace;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .15em;
}

.music-error span {
    color: #e50914;
}

.music-empty h2,
.music-error h2 {
    margin: 12px 0 8px;
    font-size: 28px;
}

.music-empty p,
.music-error p {
    color: var(--muted);
    margin: 0 0 15px;
}

.music-empty button,
.music-error button {
    padding: 10px 20px;
    border: 2px solid var(--line);
    background: var(--orange);
    box-shadow: 4px 4px 0 var(--line);
    font-weight: 900;
    cursor: pointer;
}

.music-empty button:focus-visible,
.music-error button:focus-visible {
    outline: 3px solid var(--blue);
    outline-offset: 2px;
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .music-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .music-section-list {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 960px) {
    .music-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .music-section-list {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 820px) {
    .music-header {
        grid-template-columns: 1fr auto;
    }

    .music-head-nav {
        display: none;
    }

    .music-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 14px;
    }

    .music-hero-copy::after {
        display: none;
    }
}

@media (max-width: 600px) {
    .music-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .music-section-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .music-card-info {
        padding: 10px 10px;
        gap: 6px;
    }

    .music-card-title {
        font-size: 13px;
    }

    .music-play-btn {
        min-height: 38px;
        font-size: 12px;
    }

    .music-more-btn {
        min-width: 180px;
    }
}

@media (max-width: 380px) {
    .music-grid,
    .music-section-list {
        grid-template-columns: 1fr;
    }
}

/* ===== 动效减弱 ===== */
@media (prefers-reduced-motion: reduce) {
    .music-loading-spinner {
        animation: none;
    }

    .music-card,
    .music-category-btn,
    .music-play-btn,
    .music-more-btn,
    .music-home-link,
    .music-search-btn {
        transition-duration: .01ms !important;
    }
}