/* ============================================================
 * player.css — khung phát nhạc: bìa đĩa, tiến trình, lời bài hát
 * chạy đồng bộ (LRC), nút play/prev/next, hiệu ứng equalizer,
 * viền sáng chạy quanh khung liên tục.
 * File nhạc thật (.mp3) nằm ở thư mục /audio/ — xem js/config/playlist.js
 * ============================================================ */

/* Góc chạy của viền sáng — khai báo kiểu <angle> để animate mượt bằng @property.
   Trình duyệt không hỗ trợ @property vẫn chạy bình thường, chỉ là viền đứng yên. */
@property --border-angle {
  syntax: '<angle>';
  inherits: false;
  initial-value: 0deg;
}

.panel-song{width:min(1080px,100%);margin:10px auto 0;padding:.75rem .95rem;
  display:grid;grid-template-columns:auto 1fr auto;gap:.75rem;align-items:center;
  position:relative}
@media(max-width:640px){.panel-song{grid-template-columns:1fr;justify-items:center;text-align:center}}

/* -- viền sáng chạy liên tục quanh khung nhạc -- */
.panel-song:before{
  content:"";position:absolute;inset:-1px;z-index:0;pointer-events:none;
  border-radius:inherit;padding:1.5px;
  background:conic-gradient(from var(--border-angle),
    transparent 0deg, var(--cyan) 35deg, var(--blue) 80deg, transparent 150deg, transparent 360deg);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  animation:borderChase 4.5s linear infinite;
}
@keyframes borderChase{to{--border-angle:360deg}}
.panel-song>*{position:relative;z-index:1}

.song-cover{width:42px;height:42px;border-radius:11px;flex-shrink:0;
  background:radial-gradient(circle at 30% 25%,#c8dfff 0%,#5f8ce0 30%,#233a72 62%,#0a1225 100%);
  border:1px solid rgba(191,219,254,.4);display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 22px rgba(0,0,0,.35)}
.song-cover.is-playing{animation:vinyl 6s linear infinite}
@keyframes vinyl{to{transform:rotate(360deg)}}
.song-cover svg{width:19px;height:19px;color:#eaf2ff;opacity:.9}
.song-cover.has-cover svg{opacity:0}

.song-meta{min-width:0}
.song-eq-row{display:flex;align-items:center;min-height:11px}
.song-title{font-weight:600;font-size:.82rem;color:#eef1fa;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.song-fallback{margin-top:.15rem}
.song-fallback.is-hidden{display:none}
.song-progress{margin-top:.4rem;display:flex;align-items:center;gap:.45rem}
.song-time{font-family:var(--mono);font-size:.6rem;color:var(--dim);min-width:2.3em}
.song-bar{flex:1;height:3px;border-radius:99px;background:rgba(255,255,255,.08);position:relative;cursor:pointer}
.song-bar-fill{position:absolute;inset:0 auto 0 0;width:0%;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:99px}
.song-bar-fill:after{content:"";position:absolute;right:-3px;top:50%;width:7px;height:7px;border-radius:50%;
  background:var(--cyan);transform:translateY(-50%) scale(0);box-shadow:0 0 8px 1.5px rgba(143,227,234,.65);
  transition:transform .2s var(--ease)}
.song-bar:hover .song-bar-fill:after{transform:translateY(-50%) scale(1)}
.song-hint{font-family:var(--mono);font-size:.58rem;color:var(--dim);margin-top:.25rem}

/* -- lời bài hát chạy đồng bộ theo thời gian: dòng trước mờ, dòng hiện tại nổi bật, dòng sau mờ -- */
.lyrics-ticker{display:none;flex-direction:column;gap:.05rem;margin-top:.35rem}
.lyrics-ticker.is-active{display:flex}
.lyric-line{font-size:.68rem;line-height:1.3;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  transition:opacity .18s var(--ease),transform .18s var(--ease),color .18s var(--ease)}
.lyric-line.is-empty{opacity:0}
.lyric-line.is-swap{opacity:0;transform:translateY(5px)}
.lyric-current{font-size:.8rem;font-weight:700;color:transparent;background:linear-gradient(100deg,#fff 15%,#bcd4ff 50%,#8fe3ea 75%,#fff 100%);
  background-size:220% 100%;-webkit-background-clip:text;background-clip:text;animation:shine 6s linear infinite}
@media(max-width:640px){.lyric-line{white-space:normal;text-overflow:clip}}

.song-controls{display:flex;align-items:center;gap:.4rem}
.song-btn{width:30px;height:30px;border-radius:50%;border:1px solid var(--line);background:rgba(255,255,255,.02);
  display:flex;align-items:center;justify-content:center;color:#dfe4f0;cursor:pointer;
  transition:transform .2s var(--ease),border-color .2s var(--ease)}
.song-btn:hover{transform:translateY(-2px);border-color:var(--line-bright)}
.song-btn svg{width:13px;height:13px}
.song-btn.play{width:38px;height:38px;background:linear-gradient(135deg,#a9c9ff,#8fe3ea);color:#07111e;border:none}
.song-eq{display:flex;align-items:flex-end;gap:2px;height:11px;margin-left:.3rem}
.song-eq span{width:2.5px;background:var(--cyan);border-radius:2px;height:3px}
.song-eq.is-on span{animation:eq 1s ease-in-out infinite}
.song-eq.is-on span:nth-child(2){animation-delay:.15s}
.song-eq.is-on span:nth-child(3){animation-delay:.3s}
@keyframes eq{0%,100%{height:3px}50%{height:11px}}