/* ═══════════════════════════════════════════
   MIXYUE 移动端统一设计系统
   基准：曲目详情页 Spotify / Apple Music 风格
   ═══════════════════════════════════════════ */

:root {
    /* 背景 */
    --app-bg-primary: #080a10;
    --app-bg-secondary: #0d1117;
    --app-surface: rgba(255, 255, 255, 0.03);
    --app-surface-hover: rgba(255, 255, 255, 0.06);
    --app-border: rgba(255, 255, 255, 0.08);

    /* 文字 */
    --app-text-primary: #f8fafc;
    --app-text-secondary: rgba(255, 255, 255, 0.55);
    --app-text-tertiary: rgba(255, 255, 255, 0.38);

    /* 强调色 — Spotify 绿 */
    --app-accent: #1db954;
    --app-accent-hover: #1ed760;
    --app-accent-soft: rgba(29, 185, 84, 0.18);
    --app-accent-glow: rgba(29, 185, 84, 0.35);
    --app-success: #1db954;
    --app-warning: #f59e0b;

    /* 别名（兼容 base.css V2） */
    --m-accent: #1db954;
    --m-accent-soft: rgba(29, 185, 84, 0.18);
    --m-bg-0: #080a10;
    --m-bg-1: #0d1117;
    --m-surface-0: rgba(255, 255, 255, 0.03);
    --m-surface-1: rgba(255, 255, 255, 0.05);
    --m-border-soft: rgba(255, 255, 255, 0.08);
    --m-text-0: #f8fafc;
    --m-text-1: rgba(255, 255, 255, 0.72);
    --m-text-2: rgba(255, 255, 255, 0.45);
    --m-radius-card: 14px;

    /* 曲目页别名 */
    --track-accent: #1db954;
    --track-accent-soft: rgba(29, 185, 84, 0.18);

    /* 底栏 / 播放器布局（须保持一致，避免缝隙） */
    --m-tabbar-h: 56px;
    --m-player-h: 90px;
    --m-safe-bottom: env(safe-area-inset-bottom, 0px);
    --m-tabbar-offset: calc(var(--m-tabbar-h) + var(--m-safe-bottom));
    --mx-tabbar-h: var(--m-tabbar-h);
    --mx-player-h: var(--m-player-h);
    --mx-safe-bottom: clamp(0px, env(safe-area-inset-bottom), 16px);
}

/* ── 全局背景 ── */
body.mobile-app {
    background: #080a10 !important;
    color: var(--app-text-primary);
}

/* ── Header ── */
body.mobile-app .m-header {
    height: calc(52px + env(safe-area-inset-top, 0px));
    min-height: 52px;
    padding: env(safe-area-inset-top, 0px) max(var(--m-page-gutter, 20px), env(safe-area-inset-right, 0px)) 0 max(var(--m-page-gutter, 20px), env(safe-area-inset-left, 0px));
    background: #080a10 !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}

body.mobile-app .m-header-left,
body.mobile-app .m-header-right {
    gap: 6px;
}

body.mobile-app .m-icon-btn,
body.mobile-app .m-back-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none !important;
    background: rgba(255, 255, 255, 0.08) !important;
    box-shadow: none !important;
    color: rgba(255, 255, 255, 0.88);
    transition: background 0.18s ease, transform 0.18s ease;
}

body.mobile-app .m-icon-btn:active,
body.mobile-app .m-back-btn:active {
    background: rgba(255, 255, 255, 0.14) !important;
    transform: scale(0.94);
}

body.mobile-app .m-logo-text {
    color: #fff;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

body.mobile-app .m-logo-image {
    height: 26px;
}

body.mobile-app .m-user-avatar {
    width: 28px;
    height: 28px;
    border: 2px solid rgba(255, 255, 255, 0.12);
    box-shadow: none;
}

body.mobile-app .m-cart-count {
    background: var(--app-accent);
    color: #052e16;
    border: none;
    font-weight: 800;
    top: -4px;
    right: -4px;
}

body.mobile-app .m-header-left .m-back-btn {
    display: none;
}

body.mobile-app:not(.home-page) .m-header-left .m-back-btn {
    display: inline-flex;
}

/* ── Tab Bar ── */
body.mobile-app .m-tab-bar {
    position: fixed !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    margin: 0 !important;
    display: grid !important;
    grid-template-columns: repeat(5, 1fr) !important;
    z-index: 1305 !important;
    transform: none !important;
    height: auto !important;
    min-height: var(--m-tabbar-h);
    padding-top: 0;
    padding-bottom: var(--m-safe-bottom) !important;
    background: #080a10 !important;
    border-top: 1px solid rgba(255, 255, 255, 0.06) !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    pointer-events: auto !important;
    align-items: stretch !important;
}

body.mobile-app .m-tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: var(--m-tabbar-h);
    height: var(--m-tabbar-h);
    text-decoration: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    position: relative;
    gap: 3px;
    color: rgba(255, 255, 255, 0.42);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: color 0.18s ease;
    pointer-events: auto !important;
    cursor: pointer;
}

body.mobile-app .m-tab-item:active {
    color: var(--app-accent);
}

body.mobile-app .m-tab-item i {
    font-size: 20px;
    line-height: 1;
    transition: color 0.18s ease;
}

body.mobile-app .m-tab-item.active {
    color: var(--app-accent);
}

body.mobile-app .m-tab-item.active i {
    color: var(--app-accent);
}

body.mobile-app .m-main {
    padding-top: calc(52px + env(safe-area-inset-top, 0px));
    padding-bottom: var(--m-tabbar-offset);
}

/* ── Section ── */
body.mobile-app .m-section-title {
    font-size: clamp(18px, 4.5vw, 22px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
}

body.mobile-app .m-section-title::after {
    background: var(--app-accent) !important;
}

/* ── 卡片 ── */
body.mobile-app .m-card {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.07);
    border-radius: 14px;
    box-shadow: none;
}

/* ── 列表项 ── */
body.mobile-app .m-list-item {
    border-bottom-color: rgba(255, 255, 255, 0.06);
    padding: 10px 0;
}

body.mobile-app .m-list-item:first-child {
    border-top-color: rgba(255, 255, 255, 0.06);
}

body.mobile-app .m-list-item:active {
    background: rgba(255, 255, 255, 0.04);
}

body.mobile-app .m-list-cover {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

body.mobile-app .m-list-title {
    font-weight: 700;
    color: #fff;
}

body.mobile-app .m-list-subtitle {
    color: var(--app-text-secondary);
    font-size: 12px;
}

/* ── 徽章 ── */
body.mobile-app .m-badge {
    border-radius: 999px;
    background: var(--app-accent-soft);
    color: var(--app-accent);
    font-weight: 700;
}

body.mobile-app .m-badge.purchased {
    background: var(--app-accent-soft);
    color: var(--app-accent);
}

/* 播放按钮样式见 mobile-play-btn.css */
/* ── 主按钮 ── */
body.mobile-app .m-button {
    height: auto;
    min-height: 44px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--app-accent);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 4px 20px var(--app-accent-glow);
}

body.mobile-app .m-button.secondary {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.85);
    box-shadow: none;
}

body.mobile-app .m-button:active {
    transform: scale(0.97);
}

/* ── 搜索框 ── */
body.mobile-app .m-search-input {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    color: #fff;
}

body.mobile-app .m-search-input:focus {
    border-color: var(--app-accent);
    box-shadow: 0 0 0 3px var(--app-accent-soft);
}

/* ── 流派 Modal ── */
body.mobile-app .m-genre-card.active {
    border-color: var(--app-accent);
    background: var(--app-accent-soft);
}

body.mobile-app .m-genre-card.active::before {
    background: var(--app-accent);
}

/* ── 空状态 ── */
body.mobile-app .m-empty-state {
    color: var(--app-text-secondary);
}

/* ── 分页 ── */
body.mobile-app .m-pagination .active,
body.mobile-app .m-pagination a.active {
    background: var(--app-accent);
    border-color: var(--app-accent);
    color: #fff;
}

/* ── 链接色 ── */
body.mobile-app a.m-link-accent,
body.mobile-app .m-link-accent {
    color: var(--app-accent);
}

/* ── 筛选/标签 active ── */
body.mobile-app .m-filter-chip.active,
body.mobile-app .m-tag.active {
    background: var(--app-accent-soft);
    color: var(--app-accent);
    border-color: rgba(29, 185, 84, 0.3);
}

/* ── 信息页 Hero ── */
body.mobile-app .m-info-hero {
    background: linear-gradient(180deg, rgba(29, 185, 84, 0.08), transparent);
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

body.mobile-app .m-info-hero-icon {
    background: var(--app-accent);
    box-shadow: 0 8px 24px var(--app-accent-glow);
}

body.mobile-app .m-contact-card h3 i,
body.mobile-app .m-contact-icon i {
    color: var(--app-accent);
}

body.mobile-app .m-contact-icon {
    background: var(--app-accent-soft);
}

/* ── 专辑页 Hero ── */
body.mobile-app .m-album-hero {
    background: transparent;
    border-bottom: none;
}

body.mobile-app .m-album-cover {
    border-radius: 16px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
}

body.mobile-app .m-album-play-all {
    border-radius: 999px;
    background: var(--app-accent);
    color: #fff;
    box-shadow: 0 4px 20px var(--app-accent-glow);
}

/* ── 认证页 ── */
body.mobile-app .m-auth-card,
body.mobile-app.auth-page .m-auth-card {
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.07);
}

body.mobile-app .m-auth-submit,
body.mobile-app.auth-page .m-auth-submit {
    background: var(--app-accent);
    border-radius: 999px;
}

/* ── 购物车 ── */
body.mobile-app .m-cart-total,
body.mobile-app .m-cart-checkout-btn {
    background: var(--app-accent);
}

/* ── 订单页 ── */
body.mobile-app .m-order-success-icon {
    color: var(--app-accent);
}

/* ── 页内 footer links ── */
body.mobile-app .m-footer-links {
    background: transparent;
    border-top-color: rgba(255, 255, 255, 0.06);
}

body.mobile-app .m-footer-grid a {
    color: var(--app-text-secondary);
}

body.mobile-app .m-footer-grid a:active {
    color: var(--app-accent);
}

/* ── 艺人页 Hero ── */
body.mobile-app .m-artist-hero {
    background: transparent;
    border-bottom: none;
    padding: 28px 16px;
}

body.mobile-app .m-artist-avatar {
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45);
}

/* ── 排行榜 / 流派 / 发布 Hero ── */
body.mobile-app .m-chart-hero,
body.mobile-app .m-genre-hero,
body.mobile-app .m-release-hero {
    margin: 12px 16px 8px;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.07);
    background: rgba(255, 255, 255, 0.03);
    box-shadow: none;
}

body.mobile-app .m-chart-hero-title,
body.mobile-app .m-genre-hero-title,
body.mobile-app .m-release-hero-title {
    font-size: clamp(20px, 5vw, 24px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #fff;
}

body.mobile-app .m-chart-hero-pill strong,
body.mobile-app .m-genre-hero-pill strong,
body.mobile-app .m-release-hero-pill strong {
    color: var(--app-accent);
}

/* ── 播放器按钮 ── */
body.mobile-app #global-player .player-transport .play-btn,
body.mobile-app #global-player #player-play {
    background: var(--app-accent) !important;
}

body.mobile-app #global-player #player-favorite.is-favorited {
    color: #fb7185 !important;
}

/* ── 触摸设备滚动性能：固定栏禁用 backdrop-filter，避免滚动时 GPU 合成卡顿 ── */
@media (hover: none) and (pointer: coarse) {
    body.mobile-app .m-header,
    body.mobile-app .m-tab-bar,
    body.mobile-app #global-player {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }
}