:root {
  --bg: #0f1218;
  --panel: #1a1f2b;
  --panel-2: #232a3a;
  --border: #2d3548;
  --text: #e6e9f0;
  --muted: #8b93a7;
  --accent: #ff7a45;
  --accent-2: #4f8cff;
  --ok: #2ecc71;
  --danger: #ff5d5d;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* topbar */
.topbar {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; font-size: 1.2rem; color: var(--text); }
.brand:hover { text-decoration: none; color: var(--accent); }
.tagline { color: var(--muted); font-size: 0.85rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* panels */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.panel h1 { margin-top: 0; font-size: 1.3rem; }
.panel h2 { margin-top: 0; font-size: 1.1rem; }
.panel h3 { font-size: 0.95rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }

.muted { color: var(--muted); }
.hint { font-size: 0.85rem; color: var(--muted); }
.req { color: var(--accent); }

/* forms */
.stack { display: flex; flex-direction: column; gap: 14px; }
.stack.inner { margin-top: 12px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 0.85rem; color: var(--muted); }
input[type="text"], textarea, input[type="file"] {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 9px 11px;
  font: inherit;
  width: 100%;
}
input[type="text"]:focus, textarea:focus { outline: 2px solid var(--accent-2); border-color: transparent; }
textarea { resize: vertical; }

/* Stack Start/End vertically — the left column is narrow, so side-by-side
   squeezes the time inputs and their labels. */
.time-fields { display: grid; grid-template-columns: 1fr; gap: 14px; }
.time-input { display: flex; gap: 6px; align-items: center; }
.time-input input { flex: 1; min-width: 0; }
.time-input .mark { flex: none; white-space: nowrap; }

/* buttons */
.btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 8px;
  font: inherit;
  cursor: pointer;
  transition: filter 0.15s, background 0.15s;
}
.btn:hover { filter: brightness(1.15); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #1a1206; font-weight: 600; }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--danger); border-color: var(--danger); }
.btn.small { padding: 5px 10px; font-size: 0.8rem; }
.row-actions { display: flex; gap: 10px; }

/* song list */
.song-list { list-style: none; padding: 0; margin: 0; }
.song-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  background: var(--panel-2);
}
.song-link { display: flex; flex-direction: column; }
.song-title { font-weight: 600; color: var(--text); font-size: 1.05rem; }
.song-artist { color: var(--muted); font-size: 0.85rem; }
.badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--border);
  color: var(--muted);
}
.badge.ok { background: rgba(46, 204, 113, 0.15); color: var(--ok); }

/* song header */
.song-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}
.song-header h1 { margin: 6px 0 0; }
.back { font-size: 0.85rem; }

/* layout */
.layout { display: grid; grid-template-columns: minmax(300px, 0.55fr) 1.45fr; gap: 20px; align-items: start; }
.col { min-width: 0; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

/* player */
.player { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 18px; }
.transport { display: flex; align-items: center; gap: 14px; margin-bottom: 12px; }
.time { color: var(--muted); font-variant-numeric: tabular-nums; }
.seek { width: 100%; accent-color: var(--accent); margin-bottom: 14px; }
.controls-row { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.control { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--muted); }
.control input[type="range"] { accent-color: var(--accent-2); }
.control.checkbox { flex-direction: row; align-items: center; gap: 8px; }
.now-playing { margin: 12px 0 0; font-weight: 500; }

/* section chips */
.section-buttons { display: flex; flex-wrap: wrap; gap: 10px; }
.section-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  color: var(--text);
  min-width: 110px;
  transition: all 0.15s;
}
.section-chip:hover { border-color: var(--accent-2); }
.section-chip.active { background: var(--accent); border-color: var(--accent); color: #1a1206; }
.section-chip.active .chip-time { color: #4a3417; }
.chip-name { font-weight: 600; }
.chip-time { font-size: 0.78rem; color: var(--muted); font-variant-numeric: tabular-nums; }

/* details / edit */
details { background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; }
details summary { cursor: pointer; font-weight: 500; }
.media-edit { margin-top: 16px; }
.section-edit form + form { margin-top: 10px; }

/* sheet music */
.sheet-panel { position: sticky; top: 80px; }
.sheet-pdf { width: 100%; height: 85vh; border: 1px solid var(--border); border-radius: 8px; background: #fff; margin-bottom: 10px; }
.sheet-img { width: 100%; border-radius: 8px; background: #fff; }