:root {
  --bg: #0b0b12; --bg-card: #13131f; --bg-panel: #1a1a2e;
  --border: #2a2a45; --accent: #00d4aa; --accent-dim: rgba(0,212,170,0.15);
  --text: #e8e8f0; --text-muted: #8b8b9e;
  --danger: #ef4444; --warning: #f59e0b; --success: #22c55e;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; font-family: var(--font); background: var(--bg); color: var(--text); overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* Header */
.sf-header {
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 12px 20px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}
.sf-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.sf-logo-icon {
  width: 36px; height: 36px; border-radius: 8px;
  background: url('logo.jpg') center/cover no-repeat;
  display: inline-block;
  box-shadow: 0 3px 8px rgba(0,0,0,0.2);
  vertical-align: middle; margin-right: 8px;
}
.sf-header-actions { display: flex; gap: 10px; align-items: center; }

/* Buttons */
.sf-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 18px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--bg-panel); color: var(--text); font-size: 14px; font-weight: 500;
  transition: all 0.15s;
}
.sf-btn:hover { border-color: var(--accent); }
.sf-btn-primary { background: var(--accent); color: #000; border-color: var(--accent); font-weight: 600; }
.sf-btn-primary:hover { background: #00e6b8; }
.sf-btn-danger { background: rgba(239,68,68,0.15); color: var(--danger); border-color: rgba(239,68,68,0.3); }
.sf-btn-danger:hover { background: var(--danger); color: #fff; }
.sf-btn-sm { padding: 6px 12px; font-size: 13px; border-radius: 8px; }

/* Main */
.sf-main { padding: 20px; max-width: 1200px; margin: 0 auto; }

/* Cards */
.sf-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.sf-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; cursor: pointer; transition: all 0.2s; position: relative;
}
.sf-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }
.sf-card .sf-card-actions {
  position: absolute; top: 12px; right: 12px; display: flex; gap: 6px;
  opacity: 0; transition: opacity 0.15s;
}
.sf-card:hover .sf-card-actions { opacity: 1; }
.sf-card .sf-card-actions button {
  width: 30px; height: 30px; border-radius: 8px; border: none;
  background: var(--bg-panel); color: var(--text-muted); font-size: 14px;
}
.sf-card .sf-card-actions button:hover { background: var(--danger); color: #fff; }
.sf-card-type {
  display: inline-block; padding: 3px 10px; border-radius: 6px;
  font-size: 11px; font-weight: 700; margin-bottom: 10px;
}
.sf-type-drama { background: rgba(99,102,241,0.15); color: #818cf8; }
.sf-type-musical { background: rgba(245,158,11,0.15); color: var(--warning); }
.sf-type-dance { background: rgba(34,197,94,0.15); color: var(--success); }
.sf-card-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.sf-card-meta { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
.sf-empty {
  text-align: center; padding: 80px 20px; color: var(--text-muted);
}
.sf-empty .sf-empty-icon { font-size: 56px; margin-bottom: 16px; }

/* Forms */
.sf-form-group { margin-bottom: 14px; }
.sf-form-label { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.sf-form-input, .sf-form-select, .sf-form-textarea {
  width: 100%; padding: 10px 14px; background: var(--bg-panel);
  border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); font-size: 14px; font-family: inherit;
}
.sf-form-input:focus, .sf-form-textarea:focus { outline: none; border-color: var(--accent); }
.sf-form-textarea { resize: vertical; min-height: 80px; }

/* Overlay / Modal */
.sf-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: none;
  align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
.sf-overlay.active { display: flex; }
.sf-modal {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; max-width: 480px; width: 100%;
}
.sf-modal-title { font-size: 18px; font-weight: 700; margin-bottom: 16px; }
.sf-modal-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }

/* Player / Cue List */
.sf-cue-list { display: flex; flex-direction: column; gap: 10px; }
.sf-cue-item {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; display: flex; align-items: center; gap: 12px;
  cursor: pointer; transition: all 0.15s; user-select: none;
}
.sf-cue-item:hover { border-color: var(--accent); }
.sf-cue-item.active { border-color: var(--accent); background: var(--accent-dim); }
.sf-cue-item.playing { border-color: var(--success); background: rgba(34,197,94,0.1); }
.sf-cue-number {
  width: 36px; height: 36px; border-radius: 50%; background: var(--bg-panel);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; color: var(--accent); flex-shrink: 0;
}
.sf-cue-info { flex: 1; min-width: 0; }
.sf-cue-name { font-weight: 600; font-size: 15px; margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sf-cue-type { font-size: 12px; color: var(--text-muted); }
.sf-cue-progress {
  width: 100%; height: 4px; background: var(--bg-panel); border-radius: 2px;
  margin-top: 6px; overflow: hidden;
}
.sf-cue-progress-bar {
  height: 100%; background: var(--accent); width: 0%; transition: width 0.1s linear;
}
.sf-cue-actions { display: flex; gap: 8px; flex-shrink: 0; }
.sf-cue-actions button {
  width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-panel); color: var(--text); font-size: 16px; display: flex;
  align-items: center; justify-content: center;
}
.sf-cue-actions button:hover { background: var(--accent); color: #000; border-color: var(--accent); }

/* Transport */
.sf-transport {
  background: var(--bg-card); border-top: 1px solid var(--border);
  padding: 14px 20px; display: flex; align-items: center; gap: 16px;
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 40;
}
.sf-transport button { font-size: 20px; width: 48px; height: 48px; }
.sf-transport .sf-master-slider { flex: 1; max-width: 300px; }
.sf-transport-info { font-size: 13px; color: var(--text-muted); }

/* Editor */
.sf-editor-area {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px;
  padding: 16px; margin-bottom: 16px;
}
.sf-waveform-wrap { position: relative; width: 100%; height: 160px; background: var(--bg-panel);
  border-radius: 10px; overflow: hidden; margin-bottom: 12px;
}
.sf-waveform-wrap canvas { width: 100%; height: 100%; cursor: crosshair; }
.sf-trim-bar {
  display: flex; align-items: center; gap: 12px; margin-top: 10px;
}
.sf-trim-bar label { font-size: 12px; color: var(--text-muted); }
.sf-trim-bar input[type="range"] { flex: 1; }

/* Import */
.sf-file-zone {
  border: 2px dashed var(--border); border-radius: 14px; padding: 40px 20px;
  text-align: center; color: var(--text-muted); cursor: pointer; transition: all 0.2s;
}
.sf-file-zone:hover { border-color: var(--accent); color: var(--accent); }
.sf-file-zone.dragover { border-color: var(--accent); background: var(--accent-dim); }

/* Toast */
.sf-toast {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  background: var(--bg-card); border: 1px solid var(--border); padding: 10px 18px;
  border-radius: 20px; font-size: 13px; color: var(--accent); z-index: 100;
  animation: toastIn 0.3s ease;
}
@keyframes toastIn { from { opacity:0; transform: translateX(-50%) translateY(10px); } to { opacity:1; transform: translateX(-50%); } }

/* Meter */
.sf-meter {
  display: flex; align-items: flex-end; gap: 2px;
  height: 24px;
}
.sf-meter-segment {
  width: 3px; border-radius: 1px; background: var(--bg-panel);
  transition: background 0.05s;
}
.sf-meter-segment.on { background: var(--success); }
.sf-meter-segment.warn { background: var(--warning); }
.sf-meter-segment.clip { background: var(--danger); }

/* Transport extras */
.sf-transport-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px; border-radius: 3px;
  background: var(--bg-panel); outline: none;
}
.sf-transport-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  box-shadow: 0 0 0 3px rgba(0,212,170,0.25);
}
.sf-transport-slider::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer;
  border: none;
  box-shadow: 0 0 0 3px rgba(0,212,170,0.25);
}

/* Import result */
.sf-import-result {
  padding: 8px 12px; border-radius: 8px; font-size: 13px; margin-top: 8px;
}
.sf-import-result.success { background: rgba(34,197,94,0.1); color: var(--success); border: 1px solid rgba(34,197,94,0.2); }
.sf-import-result.error { background: rgba(239,68,68,0.1); color: var(--danger); border: 1px solid rgba(239,68,68,0.2); }

/* Responsive */
@media (max-width: 768px) {
  .sf-header { padding: 10px 14px; }
  .sf-header .sf-btn span { display: none; }
  .sf-main { padding: 14px; }
  .sf-card-grid { grid-template-columns: 1fr; }
  .sf-transport { gap: 10px; padding: 10px 14px; }
  .sf-transport button { width: 44px; height: 44px; font-size: 18px; }
  .sf-cue-item { padding: 10px 12px; }
  .sf-cue-actions button { width: 32px; height: 32px; font-size: 14px; }
  .sf-mixer-channel .sf-meter-wrap { width: 20px; height: 80px; }
  .sf-mixer-fader { height: 60px; }
}
@media (min-width: 1024px) {
  .sf-play-layout { flex-direction: row; }
  .sf-cue-panel { flex: 1; padding-bottom: 160px; }
  .sf-cue-item { padding: 16px 20px; }
  .sf-cue-number { width: 40px; height: 40px; font-size: 15px; }
  .sf-cue-name { font-size: 16px; }
  .sf-cue-type { font-size: 13px; }
  .sf-cue-actions button { width: 40px; height: 40px; font-size: 18px; }
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }