/* 飞速娱乐 v2 */

:root {
    --bg: #0b1120;
    --bg-card: rgba(255,255,255,0.05);
    --border: rgba(255,255,255,0.08);
    --text: #e8ecf1;
    --text-sub: #8892b0;
    --blue: #00d4ff;
    --gold: #ffd700;
    --purple: #764ba2;
    --grad: linear-gradient(135deg, #667eea, #764ba2);
    --green: #00c853;
    --red: #ff1744;
    --radius: 14px;
    --glass: rgba(255,255,255,0.05);
    --glass-border: rgba(255,255,255,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    line-height: 1.5;
    overflow: hidden;
    height: 100vh;
}

#bg-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ═══ LOGIN ═══ */
#login-page {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    background: var(--bg);
}
#login-page.hidden { display: none; }

.login-box {
    background: var(--glass);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 48px 40px;
    width: 380px;
    max-width: 90vw;
    text-align: center;
}
.login-box h1 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.login-box .subtitle {
    color: var(--text-sub);
    font-size: 14px;
    margin-bottom: 32px;
}
.login-input {
    width: 100%;
    padding: 14px 18px;
    margin-bottom: 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.login-input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 20px rgba(0,212,255,0.15);
}
.login-btn {
    width: 100%;
    padding: 14px;
    background: var(--grad);
    border: none;
    border-radius: 10px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}
.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102,126,234,0.3);
}
.login-error {
    color: var(--red);
    font-size: 14px;
    margin-top: 12px;
}
.login-error.hidden { display: none; }

/* ═══ DASHBOARD ═══ */
#dashboard-page {
    display: none;
    position: relative;
    z-index: 1;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 28px;
    background: rgba(11,17,32,0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 10;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.header-logo { font-size: 22px; }
.header-title {
    font-size: 18px;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 14px;
}
.header-nav-btn {
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-sub);
}
.header-nav-btn.active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
}
.header-nav-btn:hover:not(.active) {
    border-color: var(--blue);
    color: var(--text);
}
#date-select {
    padding: 7px 12px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 13px;
    outline: none;
}
.btn-logout {
    padding: 7px 14px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 8px;
    color: var(--text-sub);
    font-size: 13px;
    cursor: pointer;
}
.btn-logout:hover { border-color: var(--red); color: var(--red); }

/* Guide bar */
.guide-bar {
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
    z-index: 5;
}
.guide-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 28px;
    background: rgba(255,255,255,0.02);
    border: none;
    color: var(--text-sub);
    font-size: 13px;
    cursor: pointer;
    transition: color 0.2s;
}
.guide-toggle:hover { color: var(--text); }
.guide-arrow {
    font-size: 11px;
    transition: transform 0.3s;
}
.guide-arrow.open { transform: rotate(180deg); }
.guide-content {
    padding: 0 28px 18px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.guide-content.hidden { display: none; }
.guide-cols {
    display: flex;
    gap: 40px;
}
.guide-col { flex: 1; }
.guide-col h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}
.guide-col p {
    font-size: 12px;
    color: var(--text-sub);
    line-height: 1.8;
    margin: 0;
}
.guide-col b { color: var(--text); }
@media (max-width: 768px) {
    .guide-cols { flex-direction: column; gap: 16px; }
    .guide-toggle { padding: 8px 16px; }
    .guide-content { padding: 0 16px 14px; }
}

/* Pages container */
.pages {
    flex: 1;
    overflow: hidden;
    position: relative;
}
.page {
    display: none;
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.page.active {
    display: flex;
    opacity: 1;
}

/* ═══ MAIN PAGE — Split View ═══ */
#page-main {
    display: none;
}
#page-main.active {
    display: flex;
}

.panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}
.panel-left { border-right: 1px solid var(--border); }

.panel-header {
    padding: 20px 24px 14px;
    flex-shrink: 0;
}
.panel-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}
.panel-title-icon { margin-right: 8px; }
.panel-gold .panel-title { color: var(--gold); }
.panel-blue .panel-title { color: var(--blue); }

/* Sort buttons */
.sort-bar {
    display: flex;
    gap: 8px;
}
.sort-btn {
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-sub);
    transition: all 0.2s;
}
.sort-btn.active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
}

/* Card list */
.card-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px 20px 30px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.card-list::-webkit-scrollbar { width: 5px; }
.card-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

/* Song card */
.song-card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    margin-bottom: 10px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}
.song-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(102,126,234,0.15);
}
.song-card.gold-accent { border-left: 3px solid var(--gold); }
.song-card.blue-accent { border-left: 3px solid var(--blue); }

.card-main {
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.card-rank {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-sub);
    min-width: 32px;
    text-align: center;
    font-family: 'Roboto Mono', monospace;
}
.card-rank.r1 { color: var(--gold); font-size: 24px; }
.card-rank.r2 { color: #c0c0c0; font-size: 22px; }
.card-rank.r3 { color: #cd7f32; font-size: 21px; }

.card-info { flex: 1; min-width: 0; }
.card-title {
    font-size: 16px;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 3px;
}
.card-author {
    font-size: 13px;
    color: var(--text-sub);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-data {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    flex-shrink: 0;
}
.card-data-row {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
}
.card-data-label {
    color: var(--text-sub);
    font-size: 12px;
}
.card-data-val {
    font-family: 'Roboto Mono', monospace;
    font-weight: 600;
}

.copy-btn {
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-sub);
    font-size: 12px;
    padding: 4px 8px;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
    white-space: nowrap;
}
.copy-btn:hover {
    background: var(--blue);
    color: #fff;
    border-color: var(--blue);
}
.copy-btn.copied {
    background: var(--green);
    border-color: var(--green);
    color: #fff;
}

.card-expand-icon {
    font-size: 14px;
    color: var(--text-sub);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: 8px;
}
.song-card.expanded .card-expand-icon {
    transform: rotate(180deg);
}

/* Surge tag */
.surge-fire { color: #ff6b35; font-weight: 700; }
.surge-hot { color: var(--green); font-weight: 600; }
.surge-mild { color: var(--text-sub); }
.surge-low { color: #666; }
.surge-polluted { color: #ff9100; }

/* Expanded detail */
.card-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    border-top: 1px solid transparent;
}
.song-card.expanded .card-detail {
    max-height: 500px;
    border-top-color: var(--border);
}
.detail-grid {
    padding: 14px 20px 18px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 20px;
}
.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding: 4px 0;
}
.detail-label { color: var(--text-sub); }
.detail-val {
    font-family: 'Roboto Mono', monospace;
    font-weight: 600;
    color: var(--text);
}
.detail-note {
    grid-column: 1 / -1;
    font-size: 12px;
    color: var(--text-sub);
    padding-top: 6px;
    border-top: 1px solid var(--border);
    margin-top: 4px;
}

/* ═══ ALL SONGS PAGE ═══ */
#page-all {
    display: none;
    flex-direction: column;
}
#page-all.active {
    display: flex;
}

.all-tabs {
    display: flex;
    gap: 6px;
    padding: 16px 24px 12px;
    flex-wrap: wrap;
    flex-shrink: 0;
}
.all-tab {
    padding: 7px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-sub);
    transition: all 0.2s;
}
.all-tab.active {
    background: var(--grad);
    border-color: transparent;
    color: #fff;
}
.all-tab .tab-count {
    margin-left: 4px;
    font-weight: 400;
    opacity: 0.7;
}

.all-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 24px 30px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.08) transparent;
}

/* Category badges */
.cat-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    margin-left: 8px;
}
.cat-not_on_kugou { background: rgba(255,215,0,0.2); color: var(--gold); }
.cat-cover { background: rgba(118,75,162,0.2); color: #b388ff; }
.cat-new_song { background: rgba(0,212,255,0.2); color: var(--blue); }
.cat-old_song { background: rgba(255,255,255,0.08); color: var(--text-sub); }
.cat-film { background: rgba(255,152,0,0.15); color: #ffb74d; }
.cat-original { background: rgba(255,255,255,0.06); color: #888; }

/* ═══ Mobile ═══ */
@media (max-width: 768px) {
    .header { padding: 10px 16px; }
    .header-title { font-size: 15px; }
    .header-nav-btn { padding: 6px 12px; font-size: 12px; }

    #page-main.active {
        flex-direction: column;
    }
    .panel { flex: none; height: 50%; }
    .panel-left { border-right: none; border-bottom: 1px solid var(--border); }

    .card-main { padding: 12px 14px; gap: 10px; }
    .card-title { font-size: 14px; }
    .detail-grid { grid-template-columns: 1fr; padding: 10px 14px 14px; }

    .all-tabs { padding: 12px 16px 8px; }
    .all-list { padding: 0 16px 20px; }
}