/* =========================================================================
   style.css — Giao diện trang nghe nhạc công khai
   Thesis: "đài radio lúc nửa đêm" — nền tím than sâu, điểm nhấn hổ phách,
   đĩa than xoay làm tín hiệu trực quan cho bài đang phát.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800&family=Oswald:wght@500;600;700&display=swap');

:root{
  --bg:            #150F26;
  --bg-panel:      #1E1638;
  --bg-panel-2:    #251C44;
  --line:          #372A5E;
  --text:          #F1EDFB;
  --text-dim:      #A79BD1;
  --amber:         #F2A93B;
  --amber-2:       #F7C878;
  --teal:          #4FD1C5;
  --pink:          #EF5B9C;
  --radius:        14px;
  --radius-sm:     9px;
  --shadow:        0 12px 30px rgba(6,3,20,.45);
  --font-display:  'Oswald', sans-serif;
  --font-body:     'Be Vietnam Pro', sans-serif;
}

*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  background:
    radial-gradient(1200px 600px at 90% -10%, #2c1f52 0%, transparent 60%),
    radial-gradient(900px 500px at -10% 20%, #21173f 0%, transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  min-height:100vh;
  padding-bottom:96px; /* chừa chỗ cho player bar */
}
a{ color:inherit; text-decoration:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; }
::selection{ background:var(--amber); color:#1B1330; }

h1,h2,h3,h4{ font-family:var(--font-display); letter-spacing:.02em; margin:0; }
.eyebrow{
  font-family:var(--font-display); text-transform:uppercase; letter-spacing:.18em;
  font-size:12px; color:var(--amber); margin:0 0 6px;
}

/* ---------- Layout shell ---------- */
.wrap{ max-width:1240px; margin:0 auto; padding:0 20px; }
.icon{ display:inline-block; vertical-align:-3px; flex:none; }

.topbar{
  position:sticky; top:0; z-index:50;
  background:rgba(21,15,38,.92); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{ display:flex; align-items:center; gap:14px; padding:12px 16px; max-width:1240px; margin:0 auto; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-size:20px; font-weight:700; flex:none; white-space:nowrap; }
.brand .dial{
  width:28px; height:28px; border-radius:50%;
  background:conic-gradient(from 90deg, var(--amber), var(--pink), var(--teal), var(--amber));
  position:relative; flex:none;
  animation: spin 6s linear infinite paused;
}
.brand .dial::after{ content:""; position:absolute; inset:8px; border-radius:50%; background:var(--bg); }
.nav{ display:flex; gap:4px; font-size:14px; flex:none; }
.nav a{ padding:8px 12px; border-radius:999px; color:var(--text-dim); font-weight:500; white-space:nowrap; }
.nav a:hover, .nav a.active{ background:var(--bg-panel-2); color:var(--text); }
.search-form{ flex:1; min-width:0; max-width:380px; margin-left:auto; display:flex; align-items:center; gap:8px; background:var(--bg-panel); border:1px solid var(--line); border-radius:999px; padding:8px 14px; }
.search-form input{ background:none; border:none; outline:none; color:var(--text); font-family:inherit; font-size:14px; width:100%; min-width:0; }
.search-form button{ background:none; border:none; color:var(--amber); display:flex; flex:none; }
.admin-link{ font-size:13px; color:var(--text-dim); border:1px solid var(--line); padding:7px 12px; border-radius:999px; display:flex; align-items:center; gap:6px; flex:none; white-space:nowrap; }
.admin-link:hover{ color:var(--amber); border-color:var(--amber); }

.menu-btn{
  display:none; flex:none; background:none; border:1px solid var(--line); color:var(--text);
  border-radius:10px; width:38px; height:38px; align-items:center; justify-content:center;
}
.mobile-panel{ display:none; flex-direction:column; gap:2px; padding:6px 16px 14px; border-top:1px solid var(--line); }
.mobile-panel.open{ display:flex; }
.mobile-panel a{ padding:10px 12px; border-radius:10px; color:var(--text-dim); font-size:14px; display:flex; align-items:center; gap:8px; }
.mobile-panel a.active, .mobile-panel a:hover{ background:var(--bg-panel-2); color:var(--text); }

@media (max-width: 860px){
  .brand span:last-child{ display:none; } /* ẩn chữ "Sóng Nhạc", chỉ giữ đĩa tròn để tiết kiệm chỗ */
  .nav{ display:none; }
  .admin-link span{ display:none; }
  .menu-btn{ display:flex; }
}
@media (max-width: 480px){
  .search-form{ padding:7px 12px; }
  .wrap{ padding:0 14px; }
}

/* ---------- Hero ---------- */
.hero{
  margin-top:20px; padding:26px 22px; border-radius:20px;
  background:linear-gradient(120deg, #2A1E52 0%, #1E1638 55%, #241537 100%);
  border:1px solid var(--line); position:relative; overflow:hidden;
}
@media (min-width:640px){ .hero{ margin-top:26px; padding:34px 30px; border-radius:22px; } }
.hero::before{
  content:""; position:absolute; right:-60px; top:-60px; width:280px; height:280px; border-radius:50%;
  background:radial-gradient(circle at 40% 40%, rgba(242,169,59,.35), transparent 70%);
}
.hero h1{ font-size:clamp(28px,4vw,44px); max-width:560px; line-height:1.15; }
.hero p{ color:var(--text-dim); max-width:520px; margin-top:10px; font-size:15px; }
.hero .stats{ display:flex; gap:26px; margin-top:22px; flex-wrap:wrap; }
.hero .stats div b{ display:block; font-family:var(--font-display); font-size:22px; color:var(--amber); }
.hero .stats div span{ font-size:12px; color:var(--text-dim); text-transform:uppercase; letter-spacing:.1em; }

/* ---------- Section headers ---------- */
.section{ margin-top:44px; }
.section-head{ display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin-bottom:16px; }
.section-head h2{ font-size:22px; }
.section-head .more{ font-size:13px; color:var(--amber); }

/* ---------- Filter chips (thể loại/năm/quốc gia) ---------- */
.chip-row{ display:flex; flex-wrap:wrap; gap:8px; }
.chip{
  padding:7px 14px; border-radius:999px; background:var(--bg-panel); border:1px solid var(--line);
  font-size:13px; color:var(--text-dim);
}
.chip:hover, .chip.active{ color:#1B1330; background:var(--amber); border-color:var(--amber); }

/* ---------- Song grid / cards ---------- */
.grid{ display:grid; gap:16px; grid-template-columns:repeat(auto-fill,minmax(168px,1fr)); }
.card{
  background:var(--bg-panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:12px; transition:transform .15s ease, border-color .15s ease;
}
.card:hover{ transform:translateY(-3px); border-color:var(--amber); }
.cover{
  width:100%; aspect-ratio:1/1; border-radius:var(--radius-sm); position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center; margin-bottom:10px;
}
.cover img, .mini-cover img, .detail-cover img{ width:100%; height:100%; object-fit:cover; display:block; }
.cover .note{ font-size:34px; opacity:.9; }
.cover .play-btn{
  position:absolute; inset:auto 8px 8px auto; width:38px; height:38px; border-radius:50%;
  background:var(--amber); color:#1B1330; border:none; display:flex; align-items:center; justify-content:center;
  opacity:0; transform:translateY(6px); transition:.15s;
}
.card:hover .play-btn, .card:focus-within .play-btn{ opacity:1; transform:none; }
.card .title{ font-weight:600; font-size:14px; line-height:1.3; margin-bottom:3px;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card .sub{ font-size:12px; color:var(--text-dim); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.card .meta{ font-size:11px; color:var(--text-dim); margin-top:6px; display:flex; gap:6px; align-items:center; }
.badge-hot{ background:var(--pink); color:#fff; font-size:10px; padding:2px 7px; border-radius:999px; font-weight:700; letter-spacing:.05em; display:inline-flex; align-items:center; gap:3px; }
.card.playing{ border-color:var(--amber); box-shadow:0 0 0 1px var(--amber) inset; }
.card.playing .title{ color:var(--amber); }

/* ---------- Song list rows (search results, album tracklist) ---------- */
.song-row{
  display:flex; align-items:center; gap:14px; padding:10px 12px; border-radius:var(--radius-sm);
  border:1px solid transparent;
}
.song-row:hover{ background:var(--bg-panel); border-color:var(--line); }
.song-row.playing{ background:var(--bg-panel); border-color:var(--amber); }
.song-row.playing .info .t{ color:var(--amber); }
.song-row .idx{ width:22px; text-align:center; color:var(--text-dim); font-size:13px; font-family:var(--font-display); display:flex; align-items:center; justify-content:center; }
.song-row .idx .eq{ color:var(--amber); display:flex; align-items:center; }
.song-row .mini-cover{ width:46px; height:46px; border-radius:8px; flex:none; display:flex; align-items:center; justify-content:center; overflow:hidden; }
.song-row .info{ flex:1; min-width:0; }
.song-row .info .t{ font-weight:600; font-size:14px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; display:flex; align-items:center; gap:6px; }
.song-row .info .s{ font-size:12px; color:var(--text-dim); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.song-row .actions{ display:flex; gap:6px; align-items:center; flex:none; }
.icon-btn{
  width:34px; height:34px; border-radius:50%; border:1px solid var(--line); background:var(--bg-panel-2);
  color:var(--text); display:flex; align-items:center; justify-content:center; flex:none;
}
.icon-btn:hover{ border-color:var(--amber); color:var(--amber); }
.icon-btn.active{ background:var(--amber); color:#1B1330; border-color:var(--amber); }
.song-row .dur{ font-size:12px; color:var(--text-dim); width:44px; text-align:right; flex:none; }
@media (max-width:480px){
  .song-row{ gap:10px; padding:9px 6px; }
  .song-row .dur{ display:none; }
}

/* ---------- Two-column layout for song/album detail ---------- */
.detail-grid{ display:grid; grid-template-columns:280px 1fr; gap:28px; align-items:start; }
@media (max-width:820px){ .detail-grid{ grid-template-columns:1fr; } }
.detail-cover{ border-radius:20px; overflow:hidden; aspect-ratio:1/1; display:flex; align-items:center; justify-content:center; box-shadow:var(--shadow); }
.detail-cover .note{ font-size:80px; }
.detail-meta .kicker{ color:var(--amber); font-family:var(--font-display); letter-spacing:.14em; text-transform:uppercase; font-size:12px; }
.detail-meta h1{ font-size:clamp(24px,3.4vw,36px); margin-top:6px; }
.tag-line{ display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.tag-line a{ font-size:12px; padding:5px 11px; border:1px solid var(--line); border-radius:999px; color:var(--text-dim); }
.tag-line a:hover{ color:var(--amber); border-color:var(--amber); }
.detail-actions{ display:flex; gap:10px; margin-top:20px; flex-wrap:wrap; }
.btn{
  padding:11px 20px; border-radius:999px; border:1px solid var(--line); background:var(--bg-panel-2);
  color:var(--text); font-weight:600; font-size:14px; display:inline-flex; align-items:center; gap:8px;
}
.btn.primary{ background:var(--amber); color:#1B1330; border-color:var(--amber); }
.btn:hover{ border-color:var(--amber); }

.tabs{ display:flex; gap:4px; margin-top:34px; border-bottom:1px solid var(--line); }
.tab{ padding:10px 16px; font-size:13px; color:var(--text-dim); border-bottom:2px solid transparent; }
.tab.active{ color:var(--amber); border-color:var(--amber); }
.tab-panel{ padding-top:18px; }

.lyrics{ white-space:pre-line; line-height:1.9; font-size:15px; color:#E7E1FA; max-width:640px; }

.mv-frame{ width:100%; border-radius:16px; overflow:hidden; background:#000; aspect-ratio:16/9; }
.mv-frame video{ width:100%; height:100%; }
.mv-note{ font-size:12px; color:var(--text-dim); margin-top:8px; }

/* ---------- Empty state ---------- */
.empty{ padding:60px 20px; text-align:center; color:var(--text-dim); }
.empty h3{ color:var(--text); margin-bottom:6px; }

/* ---------- Sticky bottom player ---------- */
.player-bar{
  position:fixed; left:0; right:0; bottom:0; z-index:80;
  background:rgba(20,14,37,.96); backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
  display:grid; grid-template-columns:260px 1fr 300px; align-items:center; gap:16px;
  padding:10px 18px; height:76px;
}
@media (max-width:760px){ .player-bar{ grid-template-columns:1fr auto; height:auto; padding:8px 12px; } .player-bar .pb-extra{ display:none; } }

.pb-song{ display:flex; align-items:center; gap:12px; min-width:0; }
.pb-disc{
  width:48px; height:48px; border-radius:50%; flex:none;
  background:conic-gradient(from 0deg, var(--amber), var(--pink), var(--teal), var(--amber));
  display:flex; align-items:center; justify-content:center; overflow:hidden; position:relative;
  animation:spin 5s linear infinite paused;
}
.pb-disc img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; border-radius:50%; }
.pb-disc::after{ content:""; width:16px; height:16px; border-radius:50%; background:var(--bg); position:relative; z-index:1; }
.pb-disc.spinning{ animation-play-state:running; }
.pb-song .t{ font-size:13px; font-weight:600; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.pb-song .s{ font-size:11px; color:var(--text-dim); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }

.pb-center{ display:flex; flex-direction:column; align-items:center; gap:6px; min-width:0; }
.pb-controls{ display:flex; align-items:center; gap:14px; }
.pb-controls button{ background:none; border:none; color:var(--text); display:flex; align-items:center; justify-content:center; padding:4px; }
.pb-controls .play{
  width:36px; height:36px; border-radius:50%; background:var(--amber); color:#1B1330;
  display:flex; align-items:center; justify-content:center;
}
.pb-controls .toggle-on{ color:var(--amber); }
.pb-seek{ display:flex; align-items:center; gap:8px; width:100%; max-width:520px; }
.pb-seek span{ font-size:11px; color:var(--text-dim); width:34px; }
.pb-seek input[type=range]{ flex:1; accent-color:var(--amber); }

.pb-extra{ display:flex; align-items:center; justify-content:flex-end; gap:8px; }

/* Up-next slide panel */
.upnext-panel{
  position:fixed; right:16px; bottom:92px; width:min(300px, calc(100vw - 32px)); max-height:60vh; overflow:auto;
  background:var(--bg-panel); border:1px solid var(--line); border-radius:16px; box-shadow:var(--shadow);
  padding:14px; z-index:90; display:none;
}
.upnext-panel.open{ display:block; }
.upnext-panel h4{ font-size:13px; text-transform:uppercase; letter-spacing:.1em; color:var(--text-dim); margin-bottom:10px; }

.footer{ margin-top:60px; padding:30px 0; text-align:center; color:var(--text-dim); font-size:13px; border-top:1px solid var(--line); }

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

/* Scrollbar */
::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-thumb{ background:var(--bg-panel-2); border-radius:99px; }
::-webkit-scrollbar-track{ background:transparent; }