:root {
  --bg: #0b0b12;
  --panel: #151522;
  --panel-2: #1d1d2e;
  --line: #2a2a3f;
  --text: #f2f2f7;
  --muted: #8d8da6;
  --accent: #ff3d7f;
  --accent-2: #7c4dff;
  --fast: #ff6b3d;
  --mid: #f5c542;
  --slow: #3dd6ff;
  --ok: #3ddc97;
  --danger: #ff5470;
  --radius: 14px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.5 Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background-image: radial-gradient(900px 500px at 85% -10%, rgba(124, 77, 255, .18), transparent),
                    radial-gradient(700px 400px at -10% 10%, rgba(255, 61, 127, .12), transparent);
  min-height: 100vh;
}
[hidden] { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.5em; margin: 0; }

.brand { display: flex; align-items: center; gap: 6px; font-weight: 800; font-size: 22px; letter-spacing: -.02em; }
.brand-mark { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; padding: 2px 8px; border-radius: 8px; }
.brand em { font-style: normal; font-weight: 500; color: var(--muted); font-size: 15px; margin-left: 8px; }

.btn { border: 0; border-radius: 999px; padding: 10px 20px; font: inherit; font-weight: 600; cursor: pointer; color: var(--text); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }
.btn.ghost { background: transparent; border: 1px solid var(--line); }
.btn:disabled { opacity: .5; cursor: default; }

.login { display: grid; place-items: center; min-height: 100vh; padding: 16px; }
.login-card { width: min(360px, 100%); background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 32px; display: grid; gap: 14px; }
.login-card input, .search, .edit-input {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  border-radius: 10px; padding: 11px 14px; font: inherit; width: 100%;
}
.login-card input:focus, .search:focus, .edit-input:focus { outline: 2px solid var(--accent-2); border-color: transparent; }

main { max-width: 1100px; margin: 0 auto; padding: 16px 16px 120px; }
.topbar { display: flex; justify-content: space-between; align-items: center; padding: 8px 0 24px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.stat b { display: block; font-size: 26px; font-weight: 800; letter-spacing: -.02em; }
.stat span { color: var(--muted); font-size: 13px; }

.dropzone {
  display: grid; justify-items: center; gap: 6px; text-align: center; cursor: pointer;
  border: 2px dashed var(--line); border-radius: 20px; padding: 36px 16px;
  background: rgba(21, 21, 34, .6); transition: border-color .15s, background .15s;
}
.dropzone.over, .dropzone:hover { border-color: var(--accent); background: rgba(255, 61, 127, .06); }
.drop-icon { width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center; font-size: 28px; color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }

.upload-list { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 8px; }
.upload-item { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; display: grid; gap: 6px; font-size: 14px; }
.upload-item .bar { height: 4px; background: var(--panel-2); border-radius: 4px; overflow: hidden; }
.upload-item .bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .2s; }
.upload-item.done .bar i { background: var(--ok); }
.upload-item.failed { border-color: var(--danger); }

.library { margin-top: 32px; }
.library-head { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 14px; }
.library-head h2 { margin: 0; font-size: 20px; margin-right: auto; }
.filters { display: flex; gap: 6px; }
.chip { background: var(--panel); border: 1px solid var(--line); color: var(--muted); border-radius: 999px; padding: 6px 14px; font: inherit; font-size: 13px; cursor: pointer; }
.chip.active { color: #fff; border-color: var(--accent); background: rgba(255, 61, 127, .15); }
.search { width: 220px; }

.songs { display: grid; gap: 8px; }
.song {
  display: grid; grid-template-columns: 48px 1fr auto auto; gap: 14px; align-items: center;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px;
}
.song:hover { border-color: #3a3a55; }
.play { width: 48px; height: 48px; border-radius: 12px; border: 0; cursor: pointer; color: #fff; font-size: 18px; background: linear-gradient(135deg, #2c2c44, #1f1f33); }
.play.playing { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.song-main { min-width: 0; }
.song-title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: text; }
.song-artist { color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: text; }
.song-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.tag { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; background: var(--panel-2); color: var(--muted); white-space: nowrap; }
.tag.bpm { color: var(--text); font-variant-numeric: tabular-nums; }
.tag.fast { color: var(--fast); background: rgba(255, 107, 61, .12); }
.tag.mid { color: var(--mid); background: rgba(245, 197, 66, .12); }
.tag.slow { color: var(--slow); background: rgba(61, 214, 255, .12); }
.tag.status-analyzing, .tag.status-pending { color: var(--accent-2); background: rgba(124, 77, 255, .14); }
.tag.status-failed { color: var(--danger); background: rgba(255, 84, 112, .12); }
.song-actions { display: flex; gap: 4px; }
.icon-btn { background: transparent; border: 0; color: var(--muted); cursor: pointer; padding: 6px 8px; border-radius: 8px; font: inherit; font-size: 13px; }
.icon-btn:hover { color: var(--text); background: var(--panel-2); }
.icon-btn.danger:hover { color: var(--danger); }
.song-error { grid-column: 2 / -1; color: var(--danger); font-size: 13px; }
.empty { text-align: center; padding: 40px 0; }
.spin { display: inline-block; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 720px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .song { grid-template-columns: 44px 1fr; }
  .play { width: 44px; height: 44px; }
  .song-meta, .song-actions { grid-column: 2; justify-content: flex-start; }
  .search { width: 100%; }
}

.admin-tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.admin-tabs a { text-decoration: none; }
.user-form { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: grid; gap: 12px; margin-bottom: 20px; }
.user-form h2 { margin: 0; font-size: 18px; }
.user-fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.user-fields input { background: var(--panel-2); border: 1px solid var(--line); color: var(--text); border-radius: 10px; padding: 11px 14px; font: inherit; width: 100%; }
.pw-row { display: flex; gap: 6px; }
.pw-row .btn { flex: none; white-space: nowrap; padding: 10px 14px; }
.user-row { display: grid; grid-template-columns: 44px 1fr auto; gap: 14px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; }
.user-row.off { opacity: .5; }
.user-avatar { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.secret { font-family: ui-monospace, monospace; background: var(--panel-2); padding: 2px 8px; border-radius: 6px; color: var(--text); user-select: all; }
@media (max-width: 720px) { .user-fields { grid-template-columns: 1fr; } .user-row { grid-template-columns: 44px 1fr; } .user-row .song-actions { grid-column: 2; } }