/* ===================================================================
   NhacNen.com — Giao diện website nhạc nền (preview cho WP theme)
   Design system: dark, hiện đại, tông tím-xanh neon
   =================================================================== */

:root {
  --bg: #0c0e14;
  --bg-soft: #12151f;
  --bg-card: #171b27;
  --bg-card-hover: #1e2332;
  --border: #252a3a;
  --text: #e9ecf5;
  --text-soft: #9aa3bd;
  --text-dim: #636b85;
  --primary: #7c5cff;
  --primary-soft: #9d84ff;
  --accent: #1ed8b5;
  --accent-soft: #5af0d4;
  --warn: #ffb020;
  --danger: #ff5470;
  --gold: #ffd24a;
  --silver: #c8d0e0;
  --bronze: #e0915a;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  --grad: linear-gradient(135deg, #7c5cff 0%, #1ed8b5 100%);
  --grad-warm: linear-gradient(135deg, #ff5470 0%, #ffb020 100%);
  --header-bg: rgba(12, 14, 20, 0.82);
  --player-bg: rgba(18, 21, 31, 0.95);
  --toast-bg: #1e2332;
  --player-h: 86px;
  --header-h: 64px;
  --bottomnav-h: 0px;
}

/* ---------- Light theme ---------- */
:root[data-theme="light"] {
  --bg: #e9ecf8;
  --bg-soft: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f3fd;
  --border: #dbe0f0;
  --text: #161a2b;
  --text-soft: #4d5470;
  --text-dim: #828aa6;
  /* màu thương hiệu được làm đậm hơn để nổi trên nền sáng */
  --primary: #6c45ff;
  --primary-soft: #5a2fe6;
  --accent: #07a98c;
  --accent-soft: #0a8f78;
  --warn: #d98500;
  --danger: #e63a5a;
  --gold: #d9a400;
  --silver: #8a94ad;
  --bronze: #bf6f38;
  --shadow: 0 14px 34px rgba(86, 66, 173, 0.16);
  --grad: linear-gradient(135deg, #7c5cff 0%, #11bf9d 100%);
  --header-bg: rgba(255, 255, 255, 0.8);
  --player-bg: rgba(255, 255, 255, 0.94);
  --toast-bg: #ffffff;
}
/* Nền trang có sắc tím-xanh nhẹ để các thẻ trắng nổi bật hơn */
:root[data-theme="light"] body {
  background:
    radial-gradient(1100px 520px at 100% -6%, rgba(17, 191, 157, .12), transparent 55%),
    radial-gradient(1000px 500px at -6% -2%, rgba(124, 92, 255, .15), transparent 52%),
    var(--bg);
  background-attachment: fixed;
}
:root[data-theme="light"] .hero {
  background:
    radial-gradient(1200px 440px at 12% -12%, rgba(124, 92, 255, .26), transparent 60%),
    radial-gradient(920px 400px at 90% -4%, rgba(17, 191, 157, .2), transparent 55%),
    linear-gradient(180deg, #ffffff, #f5f7fe);
}
:root[data-theme="light"] .page-hero {
  background:
    radial-gradient(760px 240px at 8% -40%, rgba(124, 92, 255, .18), transparent 60%),
    linear-gradient(180deg, #ffffff, #f5f7fe);
}
/* Sửa lỗi: link điều hướng đang chọn bị trắng trên nền trắng */
:root[data-theme="light"] .main-nav a.active { color: var(--primary); background: var(--bg-card-hover); }
:root[data-theme="light"] .main-nav a:hover { background: var(--bg-card-hover); }
/* Viền + đổ bóng màu khi rê chuột để thẻ trông sống động hơn */
:root[data-theme="light"] .track-card:hover,
:root[data-theme="light"] .genre-card:hover {
  border-color: rgba(124, 92, 255, .4);
  box-shadow: 0 16px 36px rgba(108, 69, 255, .18);
}
:root[data-theme="light"] .genre-card::before { opacity: .14; }
:root[data-theme="light"] .genre-card:hover::before { opacity: .26; }
:root[data-theme="light"] .ui-btn,
:root[data-theme="light"] .btn-ghost,
:root[data-theme="light"] .rank-tabs { box-shadow: 0 2px 8px rgba(86, 66, 173, .06); }
:root[data-theme="light"] .track-thumb .badge { background: rgba(0, 0, 0, .55); }
:root[data-theme="light"] .player-controls .pp { background: #161925; color: #fff; }
:root[data-theme="light"] .player-controls .pp:hover { color: #fff; }

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  padding-bottom: calc(var(--player-h) + var(--bottomnav-h));
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select { font-family: inherit; }

.container { max-width: 1240px; margin: 0 auto; padding: 0 22px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { height: 100%; display: flex; align-items: center; gap: 26px; }

.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 1.22rem; letter-spacing: .3px; white-space: nowrap; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 11px; background: var(--grad);
  display: grid; place-items: center; font-size: 1.2rem; box-shadow: 0 4px 16px rgba(124, 92, 255, .45);
}
.brand b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.brand span { color: var(--text-dim); font-weight: 600; font-size: .82rem; }

.main-nav { display: flex; gap: 6px; }
.main-nav a {
  padding: 9px 15px; border-radius: 9px; color: var(--text-soft);
  font-weight: 600; font-size: .93rem; transition: .15s; white-space: nowrap;
}
.main-nav a:hover { color: var(--text); background: var(--bg-card); }
.main-nav a.active { color: #fff; background: var(--bg-card); }
.main-nav a.active::after {
  content: ''; display: block; height: 2px; margin-top: 6px; border-radius: 2px; background: var(--grad);
}

.header-search { margin-left: auto; position: relative; }
.header-search input {
  width: 230px; background: var(--bg-card); border: 1px solid var(--border);
  color: var(--text); padding: 9px 14px 9px 36px; border-radius: 10px; font-size: .9rem; transition: .2s;
}
.header-search input:focus { outline: none; border-color: var(--primary); width: 280px; }
.header-search .ico { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); color: var(--text-dim); }

.btn-upload {
  background: var(--grad); color: #fff; font-weight: 700; padding: 9px 17px;
  border-radius: 10px; font-size: .9rem; box-shadow: 0 4px 14px rgba(124, 92, 255, .4); transition: .15s; white-space: nowrap;
}
.btn-upload:hover { transform: translateY(-1px); box-shadow: 0 7px 20px rgba(124, 92, 255, .55); }

.nav-toggle { display: none; font-size: 1.5rem; }

/* Theme + language controls */
.ui-controls { display: flex; align-items: center; gap: 8px; }
.ui-btn {
  height: 38px; min-width: 38px; padding: 0 11px; border-radius: 10px;
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-soft);
  font-weight: 700; font-size: .95rem; display: inline-flex; align-items: center; justify-content: center; gap: 6px; transition: .15s;
}
.ui-btn:hover { color: var(--text); border-color: var(--primary); }
.ui-btn .flag { font-size: 1.05rem; }
.lang-menu { position: relative; }
.lang-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 150px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  box-shadow: var(--shadow); padding: 6px; z-index: 80; display: none;
}
.lang-menu.open .lang-dropdown { display: block; }
.lang-dropdown button {
  width: 100%; text-align: left; padding: 9px 11px; border-radius: 8px; color: var(--text-soft);
  font-weight: 600; font-size: .9rem; display: flex; align-items: center; gap: 9px; transition: .12s;
}
.lang-dropdown button:hover { background: var(--bg-card-hover); color: var(--text); }
.lang-dropdown button.active { color: var(--primary-soft); background: var(--bg-soft); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 400px at 12% -10%, rgba(124, 92, 255, .35), transparent 60%),
    radial-gradient(900px 360px at 88% 0%, rgba(30, 216, 181, .22), transparent 55%),
    var(--bg-soft);
  border-bottom: 1px solid var(--border);
  padding: 58px 0 50px;
}
.hero h1 { font-size: 2.55rem; line-height: 1.12; font-weight: 800; max-width: 760px; letter-spacing: -.5px; }
.hero h1 em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { color: var(--text-soft); font-size: 1.08rem; max-width: 600px; margin-top: 16px; }
.hero-actions { display: flex; gap: 13px; margin-top: 28px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 1.7rem; font-weight: 800; }
.hero-stats .stat span { color: var(--text-dim); font-size: .85rem; }

.btn {
  display: inline-flex; align-items: center; gap: 9px; padding: 12px 22px; border-radius: 11px;
  font-weight: 700; font-size: .96rem; transition: .15s;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 6px 18px rgba(124, 92, 255, .4); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(124, 92, 255, .55); }
.btn-ghost { background: var(--bg-card); border: 1px solid var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--bg-card-hover); border-color: var(--primary); }

/* ---------- Section ---------- */
section.block { padding: 46px 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; gap: 16px; flex-wrap: wrap; }
.section-head h2 { font-size: 1.5rem; font-weight: 800; display: flex; align-items: center; gap: 11px; }
.section-head h2 .bar { width: 5px; height: 24px; border-radius: 3px; background: var(--grad); }
.section-head .link { color: var(--text-soft); font-weight: 600; font-size: .9rem; }
.section-head .link:hover { color: var(--primary-soft); }

/* ---------- Genre chips ---------- */
.genre-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
.genre-card {
  position: relative; overflow: hidden; border-radius: var(--radius); padding: 22px 18px;
  background: var(--bg-card); border: 1px solid var(--border); transition: .18s; min-height: 116px;
}
.genre-card:hover { transform: translateY(-4px); border-color: transparent; box-shadow: var(--shadow); }
.genre-card::before {
  content: ''; position: absolute; inset: 0; opacity: .16; transition: .18s;
  background: var(--gc, var(--grad));
}
.genre-card:hover::before { opacity: .3; }
.genre-card .emoji { font-size: 1.9rem; position: relative; }
.genre-card h3 { position: relative; font-size: 1.08rem; margin-top: 12px; font-weight: 700; }
.genre-card span { position: relative; color: var(--text-soft); font-size: .82rem; }

/* ---------- Track grid (cards) ---------- */
.track-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(186px, 1fr)); gap: 20px; }
.track-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 13px; transition: .18s; cursor: pointer;
}
.track-card:hover { background: var(--bg-card-hover); transform: translateY(-4px); box-shadow: var(--shadow); }
.track-thumb { position: relative; border-radius: var(--radius-sm); overflow: hidden; aspect-ratio: 1; }
.track-thumb .cover { width: 100%; height: 100%; display: grid; place-items: center; font-size: 2.6rem; background: var(--cv, var(--grad)); }
.track-thumb .play-fab {
  position: absolute; right: 10px; bottom: 10px; width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: #04201b; display: grid; place-items: center; font-size: 1.1rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .45); opacity: 0; transform: translateY(8px); transition: .18s;
}
.track-card:hover .play-fab { opacity: 1; transform: translateY(0); }
.track-thumb .badge {
  position: absolute; left: 9px; top: 9px; background: rgba(0,0,0,.6); backdrop-filter: blur(4px);
  color: #fff; font-size: .72rem; font-weight: 700; padding: 3px 8px; border-radius: 7px;
}
.track-card h4 { font-size: .98rem; margin-top: 12px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track-card .meta { color: var(--text-dim); font-size: .8rem; margin-top: 3px; }
.track-card .stats {
  display: flex; align-items: center; gap: 14px; margin-top: 11px; padding-top: 11px;
  border-top: 1px solid var(--border); color: var(--text-soft); font-size: .8rem;
}
.track-card .stats span { display: inline-flex; align-items: center; gap: 5px; }
.track-card .stats .dl { margin-left: auto; color: var(--accent); font-weight: 700; }

/* ---------- Ranking list ---------- */
.rank-tabs { display: inline-flex; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; padding: 4px; gap: 3px; }
.rank-tabs button, .rank-tabs a {
  padding: 9px 20px; border-radius: 9px; font-weight: 700; font-size: .9rem; color: var(--text-soft); transition: .15s; cursor: pointer;
}
.rank-tabs button.active, .rank-tabs a.active { background: var(--grad); color: #fff; box-shadow: 0 4px 12px rgba(124,92,255,.4); }

.rank-list { display: flex; flex-direction: column; gap: 8px; }
.rank-row {
  display: grid; grid-template-columns: 54px 56px 1fr auto auto; align-items: center; gap: 16px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 11px 18px; transition: .15s; cursor: pointer;
}
.rank-row:hover { background: var(--bg-card-hover); border-color: var(--primary); }
.rank-num { font-size: 1.35rem; font-weight: 800; text-align: center; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.rank-row.top1 .rank-num { color: var(--gold); }
.rank-row.top2 .rank-num { color: var(--silver); }
.rank-row.top3 .rank-num { color: var(--bronze); }
.rank-row .trend { font-size: .72rem; font-weight: 700; display: block; margin-top: 2px; }
.trend.up { color: var(--accent); } .trend.down { color: var(--danger); } .trend.flat { color: var(--text-dim); }
.rank-cover { width: 56px; height: 56px; border-radius: 10px; display: grid; place-items: center; font-size: 1.5rem; background: var(--cv, var(--grad)); }
.rank-info h4 { font-size: 1rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rank-info .meta { color: var(--text-dim); font-size: .82rem; margin-top: 2px; }
.rank-metric { text-align: right; }
.rank-metric b { font-size: 1.05rem; font-weight: 800; display: block; }
.rank-metric span { color: var(--text-dim); font-size: .76rem; }
.rank-actions { display: flex; gap: 8px; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 10px; background: var(--bg-soft); border: 1px solid var(--border);
  display: grid; place-items: center; color: var(--text-soft); transition: .15s;
}
.icon-btn:hover { color: #fff; border-color: var(--primary); background: var(--primary); }
.icon-btn.dl:hover { background: var(--accent); border-color: var(--accent); color: #04201b; }
.icon-btn.on { color: var(--danger); border-color: var(--danger); }

/* ---------- Lyrics ---------- */
.lyrics-layout { display: grid; grid-template-columns: 1fr 360px; gap: 30px; align-items: start; }
.lyrics-search-box {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
}
.lyrics-search-box .field { position: relative; }
.lyrics-search-box input {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 14px 16px 14px 44px; border-radius: 11px; font-size: 1rem;
}
.lyrics-search-box input:focus { outline: none; border-color: var(--primary); }
.lyrics-search-box .ico { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); color: var(--text-dim); font-size: 1.1rem; }
.lyrics-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.chip {
  padding: 7px 14px; border-radius: 20px; background: var(--bg-soft); border: 1px solid var(--border);
  font-size: .84rem; font-weight: 600; color: var(--text-soft); transition: .15s;
}
.chip:hover, .chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.lyric-result {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; margin-bottom: 12px; display: flex; gap: 16px; align-items: center; transition: .15s; cursor: pointer;
}
.lyric-result:hover { border-color: var(--primary); background: var(--bg-card-hover); }
.lyric-result .lcover { width: 50px; height: 50px; border-radius: 9px; display: grid; place-items: center; font-size: 1.3rem; background: var(--cv, var(--grad)); flex-shrink: 0; }
.lyric-result .linfo { flex: 1; min-width: 0; }
.lyric-result h4 { font-size: 1rem; font-weight: 700; }
.lyric-result .snippet { color: var(--text-soft); font-size: .85rem; margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.lyric-result .snippet mark { background: rgba(124,92,255,.35); color: var(--primary-soft); padding: 0 2px; border-radius: 3px; }
.lyric-result .tag { font-size: .74rem; color: var(--text-dim); background: var(--bg-soft); padding: 4px 9px; border-radius: 6px; font-weight: 600; flex-shrink: 0; }

.lyric-viewer {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; position: sticky; top: 84px;
}
.lyric-viewer .lv-head { display: flex; gap: 14px; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.lyric-viewer .lv-cover { width: 60px; height: 60px; border-radius: 11px; display: grid; place-items: center; font-size: 1.6rem; background: var(--grad); }
.lyric-viewer h3 { font-size: 1.15rem; font-weight: 800; }
.lyric-viewer .lv-sub { color: var(--text-dim); font-size: .85rem; }
.lyric-viewer pre { font-family: inherit; white-space: pre-wrap; color: var(--text-soft); line-height: 1.9; font-size: .96rem; max-height: 440px; overflow-y: auto; }
.lyric-viewer pre::-webkit-scrollbar { width: 6px; }
.lyric-viewer pre::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ---------- Upload form ---------- */
.upload-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; margin-top: 16px;
}
.upload-card h3 { font-size: 1.1rem; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: .86rem; font-weight: 600; color: var(--text-soft); margin-bottom: 7px; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 11px 13px; border-radius: 10px; font-size: .92rem;
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--primary); }
.form-row textarea { min-height: 150px; resize: vertical; line-height: 1.7; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 30px; text-align: center;
  color: var(--text-dim); transition: .15s; cursor: pointer;
}
.dropzone:hover { border-color: var(--primary); color: var(--text-soft); background: rgba(124,92,255,.05); }
.dropzone .big { font-size: 2.2rem; margin-bottom: 8px; }

/* ---------- Player bar ---------- */
.player {
  position: fixed; bottom: var(--bottomnav-h); left: 0; right: 0; z-index: 60; height: var(--player-h);
  background: var(--player-bg); backdrop-filter: blur(18px); border-top: 1px solid var(--border);
}
.player .container { height: 100%; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 20px; }
.np { display: flex; align-items: center; gap: 13px; min-width: 0; }
.np .np-cover { width: 54px; height: 54px; border-radius: 11px; display: grid; place-items: center; font-size: 1.4rem; background: var(--cv, var(--grad)); background-size: cover; background-position: center; flex-shrink: 0; }
.np .np-cover.spin { animation: spin 8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.np-info { min-width: 0; }
.np-info h4 { font-size: .96rem; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.np-info span { color: var(--text-dim); font-size: .8rem; }
.np .np-like { color: var(--text-dim); font-size: 1.2rem; transition: .15s; }
.np .np-like.on { color: var(--danger); }

.player-center { display: flex; flex-direction: column; align-items: center; gap: 7px; width: 460px; max-width: 46vw; }
.player-controls { display: flex; align-items: center; gap: 18px; }
.player-controls button { color: var(--text-soft); font-size: 1.15rem; transition: .15s; }
.player-controls button:hover { color: #fff; }
.player-controls .pp {
  width: 44px; height: 44px; border-radius: 50%; background: #fff; color: #111;
  display: grid; place-items: center; font-size: 1.15rem;
}
.player-controls .pp:hover { transform: scale(1.07); color: #111; }
.progress { display: flex; align-items: center; gap: 10px; width: 100%; }
.progress .t { font-size: .73rem; color: var(--text-dim); font-variant-numeric: tabular-nums; min-width: 34px; text-align: center; }
.bar { flex: 1; height: 5px; background: var(--border); border-radius: 3px; position: relative; cursor: pointer; }
.bar .fill { position: absolute; left: 0; top: 0; bottom: 0; width: 32%; background: var(--grad); border-radius: 3px; }
.bar .knob { position: absolute; top: 50%; left: 32%; transform: translate(-50%, -50%); width: 13px; height: 13px; border-radius: 50%; background: #fff; box-shadow: 0 2px 6px rgba(0,0,0,.4); opacity: 0; transition: .15s; }
.bar:hover .knob { opacity: 1; }

.player-right { display: flex; align-items: center; justify-content: flex-end; gap: 16px; }
.player-right .vol { display: flex; align-items: center; gap: 9px; width: 130px; color: var(--text-soft); }
.player-right .vol .bar { width: 90px; }
.player-right .vol .fill { width: 70%; }
.player-right .dl-btn {
  display: inline-flex; align-items: center; gap: 7px; background: var(--accent); color: #04201b;
  font-weight: 700; font-size: .85rem; padding: 9px 15px; border-radius: 10px; transition: .15s;
}
.player-right .dl-btn:hover { background: var(--accent-soft); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 46px 0 30px; margin-top: 30px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; }
.footer-grid h5 { font-size: .95rem; margin-bottom: 14px; }
.footer-grid a, .footer-grid p { display: block; color: var(--text-soft); font-size: .88rem; margin-bottom: 9px; }
.footer-grid a:hover { color: var(--primary-soft); }
.footer-bottom { margin-top: 34px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--text-dim); font-size: .84rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ---------- Page header (sub pages) ---------- */
.page-hero { background: var(--bg-soft); border-bottom: 1px solid var(--border); padding: 40px 0; }
.page-hero h1 { font-size: 2rem; font-weight: 800; }
.page-hero p { color: var(--text-soft); margin-top: 8px; max-width: 640px; }
.breadcrumb { color: var(--text-dim); font-size: .85rem; margin-bottom: 12px; }
.breadcrumb a:hover { color: var(--primary-soft); }

/* ---------- Misc ---------- */
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 20px; background: var(--bg-card); border: 1px solid var(--border); font-size: .82rem; font-weight: 600; color: var(--text-soft); }
.muted { color: var(--text-dim); }
.hidden { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .lyrics-layout { grid-template-columns: 1fr; }
  .lyric-viewer { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .player-right .vol { display: none; }
  .player-center { max-width: 50vw; }
}
@media (max-width: 760px) {
  :root { --bottomnav-h: 64px; }
  .bottom-nav { display: flex; }
  .main-nav, .header-search { display: none; }
  .nav-toggle { display: block; }
  .main-nav.open {
    display: flex; flex-direction: column; gap: 4px;
    position: absolute; top: var(--header-h); left: 0; right: 0; z-index: 49;
    background: var(--bg-soft); border-bottom: 1px solid var(--border);
    padding: 12px 22px 16px; box-shadow: var(--shadow);
  }
  .main-nav.open a { padding: 11px 14px; }
  .hero h1 { font-size: 1.9rem; }
  .player .container { grid-template-columns: 1fr auto; }
  .player-right { display: none; }
  .player-center { width: auto; max-width: 52vw; }
  .form-grid { grid-template-columns: 1fr; }
  .rank-row { grid-template-columns: 40px 48px 1fr auto; }
  .rank-actions { display: none; }
}

/* ===================================================================
   Bổ sung: bottom-nav mobile, PWA, trang con (chi tiết / duyệt / about / 404)
   =================================================================== */

/* ---------- Bottom navigation (mobile, kiểu app) ---------- */
.bottom-nav {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 61;
  height: var(--bottomnav-h);
  background: var(--player-bg); backdrop-filter: blur(18px);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.bottom-nav a {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  color: var(--text-dim); font-size: .68rem; font-weight: 600; transition: .15s;
}
.bottom-nav a .bn-ico { font-size: 1.25rem; line-height: 1; transition: .15s; }
.bottom-nav a.active { color: var(--primary-soft); }
.bottom-nav a.active .bn-ico { transform: translateY(-1px) scale(1.08); }

/* ---------- Nút cài đặt PWA ---------- */
.pwa-install {
  position: fixed; right: 16px; z-index: 70;
  bottom: calc(var(--player-h) + var(--bottomnav-h) + 16px);
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--grad); color: #fff; font-weight: 700; font-size: .9rem;
  padding: 11px 16px; border-radius: 30px; box-shadow: 0 8px 24px rgba(124, 92, 255, .5);
  animation: pwaPop .3s ease;
}
.pwa-install:hover { transform: translateY(-2px); }
@keyframes pwaPop { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- Trang chi tiết bản nhạc ---------- */
.detail-hero {
  background:
    radial-gradient(900px 360px at 15% -20%, rgba(124, 92, 255, .3), transparent 60%),
    radial-gradient(700px 320px at 90% 0%, rgba(30, 216, 181, .2), transparent 55%),
    var(--bg-soft);
  border-bottom: 1px solid var(--border); padding: 34px 0;
}
.detail-top { display: flex; gap: 28px; align-items: flex-end; flex-wrap: wrap; }
.d-cover {
  width: 220px; height: 220px; border-radius: 20px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 5rem; box-shadow: var(--shadow);
  background: var(--cv, var(--grad)); background-size: cover; background-position: center;
}
.d-head { flex: 1; min-width: 240px; }
.d-head .pill { margin-bottom: 12px; }
.d-head h1 { font-size: 2.1rem; font-weight: 800; line-height: 1.1; }
.d-sub { color: var(--text-soft); margin-top: 8px; font-size: 1rem; }
.d-stats { display: flex; gap: 26px; margin-top: 18px; flex-wrap: wrap; }
.d-stats .s b { font-size: 1.25rem; font-weight: 800; display: block; }
.d-stats .s span { color: var(--text-dim); font-size: .8rem; }
.d-actions { display: flex; gap: 11px; margin-top: 22px; flex-wrap: wrap; align-items: center; }
.d-wave { display: flex; align-items: flex-end; gap: 3px; height: 46px; margin-top: 24px; }
.d-wave i { flex: 1; background: var(--grad); border-radius: 3px; opacity: .55; min-width: 2px; }

/* Menu chọn định dạng tải */
.dl-menu { position: relative; }
.dl-dropdown {
  position: absolute; left: 0; top: calc(100% + 8px); min-width: 210px; z-index: 30;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow);
  padding: 6px; display: none;
}
.dl-menu.open .dl-dropdown { display: block; }
.dl-dropdown button {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px; color: var(--text-soft); font-weight: 600; font-size: .88rem; transition: .12s;
}
.dl-dropdown button:hover { background: var(--bg-card-hover); color: var(--text); }
.dl-dropdown button small { color: var(--text-dim); font-weight: 600; }

.detail-grid { display: grid; grid-template-columns: 1fr 320px; gap: 30px; align-items: start; }
.d-tags { display: flex; flex-wrap: wrap; gap: 9px; }
.d-info-card, .d-panel {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
}
.d-info-card h3, .d-panel h3 { font-size: 1.05rem; margin-bottom: 14px; display: flex; align-items: center; gap: 9px; }
.d-info-row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.d-info-row:last-child { border-bottom: none; }
.d-info-row span { color: var(--text-dim); }
.d-info-row b { font-weight: 700; }
.d-license { color: var(--text-soft); font-size: .9rem; line-height: 1.7; }
.d-lyric pre { font-family: inherit; white-space: pre-wrap; color: var(--text-soft); line-height: 1.9; font-size: .95rem; }

/* ---------- Trang duyệt / thể loại ---------- */
.browse-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; align-items: start; }
.filter-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: sticky; top: 84px;
}
.filter-card h3 { font-size: 1rem; margin-bottom: 14px; }
.filter-group { margin-bottom: 20px; }
.filter-group > label { display: block; font-size: .82rem; font-weight: 700; color: var(--text-dim); text-transform: uppercase; letter-spacing: .4px; margin-bottom: 10px; }
.filter-list { display: flex; flex-direction: column; gap: 2px; }
.filter-list button {
  text-align: left; padding: 9px 12px; border-radius: 9px; color: var(--text-soft); font-weight: 600; font-size: .9rem;
  display: flex; justify-content: space-between; align-items: center; transition: .12s;
}
.filter-list button:hover { background: var(--bg-card-hover); color: var(--text); }
.filter-list button.active { background: var(--primary); color: #fff; }
.filter-list button .n { font-size: .78rem; opacity: .8; }
.filter-card select, .browse-search input {
  width: 100%; background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 10px 12px; border-radius: 10px; font-size: .9rem;
}
.browse-search { position: relative; margin-bottom: 18px; }
.browse-search .ico { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--text-dim); }
.browse-search input { padding-left: 40px; }
.browse-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; gap: 14px; flex-wrap: wrap; }
.browse-head .count { color: var(--text-soft); font-size: .92rem; }
.browse-head .count b { color: var(--text); }
.btn-text { color: var(--text-soft); font-weight: 600; font-size: .88rem; }
.btn-text:hover { color: var(--primary-soft); }
.filter-toggle { display: none; }

/* ---------- About / Contact ---------- */
.about-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; align-items: start; }
.prose { color: var(--text-soft); line-height: 1.8; }
.prose h2 { color: var(--text); font-size: 1.4rem; margin: 26px 0 12px; }
.prose p { margin-bottom: 14px; }
.feature-list { display: grid; gap: 14px; margin: 18px 0; }
.feature-item { display: flex; gap: 14px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.feature-item .fi-ico { font-size: 1.6rem; }
.feature-item h4 { font-size: 1rem; }
.feature-item p { color: var(--text-soft); font-size: .88rem; margin-top: 4px; }

/* ---------- 404 ---------- */
.errpage { min-height: 64vh; display: grid; place-items: center; text-align: center; padding: 60px 22px; }
.errpage .code { font-size: 6rem; font-weight: 800; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.errpage h1 { font-size: 1.7rem; margin: 12px 0 8px; }
.errpage p { color: var(--text-soft); max-width: 460px; margin: 0 auto 24px; }

/* ---------- Responsive cho trang con ---------- */
@media (max-width: 920px) {
  .detail-grid { grid-template-columns: 1fr; }
  .browse-layout { grid-template-columns: 1fr; }
  .filter-card { position: static; }
  .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .d-cover { width: 150px; height: 150px; font-size: 3.4rem; border-radius: 16px; }
  .d-head h1 { font-size: 1.6rem; }
  .detail-top { gap: 18px; }
  .d-stats { gap: 18px; }
  .errpage .code { font-size: 4.4rem; }
  /* Bộ lọc thu gọn thành nút bật/tắt trên mobile */
  .filter-toggle {
    display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: 11px;
    padding: 12px; font-weight: 700; color: var(--text); margin-bottom: 16px;
  }
  .filter-card { display: none; }
  .filter-card.open { display: block; }
}


/* ===== CTA box (trang chủ) — thay cho style inline, thích ứng sáng/tối ===== */
.cta-box{
  background:radial-gradient(800px 300px at 80% 0,rgba(30,216,181,.2),transparent),linear-gradient(135deg,#1a1340,#0f2b2a);
  border:1px solid var(--border);border-radius:20px;padding:42px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
:root[data-theme="light"] .cta-box{
  background:radial-gradient(800px 300px at 80% 0,rgba(7,169,140,.16),transparent),linear-gradient(135deg,#efeaff,#e2f6f1);
}

/* ===== Lọc dạng radio (archive server-render) + phân trang ===== */
.filter-radio{
  display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:10px;
  font-size:.92rem;color:var(--text-soft);cursor:pointer;
}
.filter-radio:hover{ background:var(--bg-card-hover);color:var(--text); }
.filter-radio input{ accent-color:var(--primary); }
.filter-radio small{ margin-left:auto;color:var(--text-dim);font-size:.78rem; }
.nn-pagination,.page-numbers{ }
.page-numbers{
  display:inline-block;min-width:38px;padding:8px 12px;margin:0 3px;border-radius:10px;
  border:1px solid var(--border);background:var(--bg-card);color:var(--text-soft);
  text-decoration:none;font-weight:600;
}
.page-numbers.current{ background:var(--grad);color:#fff;border-color:transparent; }
a.page-numbers:hover{ background:var(--bg-card-hover);color:var(--text); }

/* ===== Danh sách thông tin chi tiết (single-track) ===== */
.d-info-list{ list-style:none;margin:0;padding:0; }
.d-info-list li{
  display:flex;justify-content:space-between;gap:12px;padding:10px 0;
  border-bottom:1px solid var(--border);font-size:.94rem;
}
.d-info-list li:last-child{ border-bottom:0; }
.d-info-list li span{ color:var(--text-dim); }
.d-info-list li b{ color:var(--text); }
.d-desc{ color:var(--text-soft);line-height:1.7; }
.d-desc p{ margin:0 0 12px; }

/* ===== Thẻ thống kê tổng (trang BXH) ===== */
.stat-cards{ display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px; }
.stat-card{ background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px; }
.stat-card .muted{ font-size:.85rem; }
.stat-card .big{ font-size:1.8rem;font-weight:800;margin-top:6px; }
/* rank-tabs: hỗ trợ cả <a> (server-render) lẫn <button> */
.rank-tabs a{ text-decoration:none; }

/* ===== Bổ sung: kết quả lời, viewer, form message ===== */
.lyric-result{ cursor:pointer; }
.lyric-result .excerpt{ color:var(--text-soft);font-size:.88rem;margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden; }
.lyric-result .meta{ color:var(--text-dim);font-size:.82rem;margin-top:3px; }
.lyric-result.active{ border-color:var(--primary);background:var(--bg-card-hover); }
.lyric-body-src{ display:none; }
.lyric-text{ white-space:pre-wrap;line-height:1.85;color:var(--text-soft);font-size:1rem; }
.form-msg{ margin-top:12px;padding:10px 14px;border-radius:10px;font-size:.9rem;font-weight:600; }
.form-msg.ok{ background:rgba(7,169,140,.15);color:var(--accent); }
.form-msg.err{ background:rgba(230,58,90,.15);color:var(--danger); }
.errpage .err-emoji{ font-size:4rem;margin-bottom:10px; }
.errpage h2{ font-size:1.5rem;margin-bottom:8px; }