:root {
  --km-bg: #0a0a0d;
  --km-surface: #16161b;
  --km-surface-2: #1f1f26;
  --km-border: #2a2a32;

  --km-white: #f5f4f6;
  --km-white-dim: #a8a6ad;

  --km-pink: #f4a9c4;
  --km-pink-soft: #fce2ec;
  --km-pink-deep: #d67fa3;

  --km-glow: rgba(244, 169, 196, 0.25);
  --km-radius: 14px;
  --km-radius-sm: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--km-bg);
  color: var(--km-white);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
}

/* ---------- Nebula background ---------- */
.bg-nebula {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 40% at 15% 10%, rgba(244, 169, 196, 0.14), transparent 60%),
    radial-gradient(ellipse 50% 50% at 85% 0%, rgba(180, 150, 220, 0.10), transparent 65%),
    radial-gradient(ellipse 70% 60% at 50% 100%, rgba(90, 60, 100, 0.12), transparent 70%),
    radial-gradient(circle at 70% 60%, rgba(0,0,0,0.9), var(--km-bg) 55%);
  pointer-events: none;
}

/* ---------- Topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--km-border);
  position: sticky;
  top: 0;
  background: rgba(10, 10, 13, 0.85);
  backdrop-filter: blur(10px);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.2px;
}
.brand i { color: var(--km-pink); }

.tabs {
  display: flex;
  gap: 6px;
  background: var(--km-surface);
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--km-border);
}

.tab {
  border: none;
  background: transparent;
  color: var(--km-white-dim);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s ease, color 0.15s ease;
}

.tab.active {
  background: var(--km-pink);
  color: #1a0f14;
}

/* ---------- Stage (preview canvas) ---------- */
.stage-wrap {
  padding: 16px;
}

.stage {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 60vh;
  margin: 0 auto;
  background: #000;
  border-radius: var(--km-radius);
  overflow: hidden;
  border: 1px solid var(--km-border);
  box-shadow: 0 0 40px var(--km-glow);
}

#glcanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.stage-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--km-white-dim);
  font-size: 13px;
}
.stage-empty i { font-size: 28px; opacity: 0.5; }

/* ---------- Panels ---------- */
.panel {
  padding: 0 16px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 640px;
  margin: 0 auto;
}
.panel.hidden { display: none; }

.card {
  background: var(--km-surface);
  border: 1px solid var(--km-border);
  border-radius: var(--km-radius);
  padding: 16px;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: var(--km-pink);
  margin-bottom: 12px;
}

/* ---------- Dropzone ---------- */
.dropzone {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1.5px dashed var(--km-border);
  border-radius: var(--km-radius-sm);
  padding: 14px;
  cursor: pointer;
  color: var(--km-white-dim);
  font-size: 13.5px;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.dropzone:hover {
  border-color: var(--km-pink);
  color: var(--km-pink);
  background: rgba(244, 169, 196, 0.05);
}
.dropzone i { font-size: 16px; }

.hint {
  font-size: 11.5px;
  color: var(--km-white-dim);
  margin: 8px 0 0;
}

.status {
  font-size: 12px;
  color: var(--km-white-dim);
  margin: 10px 0 0;
  font-family: 'SF Mono', Consolas, monospace;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: var(--km-radius-sm);
  padding: 11px 16px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.1s ease;
}
.btn:active { transform: scale(0.98); }

.btn.primary {
  background: var(--km-pink);
  color: #1a0f14;
}
.btn.primary:hover { filter: brightness(1.08); }

.btn.ghost {
  background: var(--km-surface-2);
  color: var(--km-white);
  border: 1px solid var(--km-border);
  width: 100%;
  margin-top: 10px;
}
.btn.ghost:hover { border-color: var(--km-pink-deep); }

.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.btn-row .btn { flex: 1; min-width: 100px; }

/* ---------- Inputs ---------- */
.input-row {
  display: flex;
  gap: 8px;
}
.input-row input {
  flex: 1;
}

input[type="text"], select {
  background: var(--km-surface-2);
  border: 1px solid var(--km-border);
  color: var(--km-white);
  padding: 10px 12px;
  border-radius: var(--km-radius-sm);
  font-size: 13.5px;
  width: 100%;
}
input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--km-pink);
}

.field-label {
  display: block;
  font-size: 12px;
  color: var(--km-white-dim);
  margin: 10px 0 6px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-top: 10px;
  cursor: pointer;
}
.checkbox-row input { accent-color: var(--km-pink); width: 16px; height: 16px; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* ---------- Seek / range ---------- */
input[type="range"] {
  width: 100%;
  accent-color: var(--km-pink);
  margin: 10px 0;
}

/* ---------- Media list ---------- */
.media-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}
.media-item {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--km-surface-2);
  border-radius: var(--km-radius-sm);
  padding: 8px 10px;
  font-size: 12.5px;
}
.media-item i { color: var(--km-pink); width: 16px; text-align: center; }
.media-item .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.media-item .size { color: var(--km-white-dim); font-size: 11px; }

.media-item-rich {
  flex-wrap: wrap;
  align-items: center;
  padding: 10px;
}
.media-thumb {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 6px;
  background: #000;
  flex-shrink: 0;
}
.media-thumb-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--km-surface);
  border-radius: 6px;
  color: var(--km-pink);
  font-size: 16px;
  flex-shrink: 0;
}
.media-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  gap: 2px;
}
.media-info .name { font-size: 12.5px; }
.media-assign-select {
  width: 100%;
  margin-top: 8px;
  font-size: 12px;
  padding: 8px 10px;
}
.media-assign-btn {
  width: 100%;
  margin-top: 8px;
}

/* ---------- TikTok audio preview ---------- */
.audio-preview {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  align-items: center;
}
.audio-preview img {
  width: 48px;
  height: 64px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--km-border);
}
.audio-info { flex: 1; min-width: 0; }
.audio-title {
  font-size: 12px;
  color: var(--km-white-dim);
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.audio-preview audio { width: 100%; height: 32px; }

/* ---------- Timeline ---------- */
.timeline-wrap {
  position: relative;
  background: var(--km-surface-2);
  border-radius: var(--km-radius-sm);
  min-height: 90px;
  overflow-x: auto;
  border-left: 2px solid var(--km-pink);
}
.timeline-track {
  position: relative;
  height: 90px;
  min-width: 100%;
}
.timeline-cursor {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--km-pink);
  z-index: 5;
  pointer-events: none;
}
.timeline-clip {
  position: absolute;
  height: 26px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--km-pink-deep), var(--km-pink));
  font-size: 10px;
  color: #1a0f14;
  font-weight: 600;
  display: flex;
  align-items: center;
  padding: 0 6px;
  overflow: hidden;
  white-space: nowrap;
  cursor: default;
}

.zoom-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--km-white-dim);
}
.zoom-row input { flex: 1; margin: 0; }

/* ---------- Log box ---------- */
.log-box {
  background: #000;
  border: 1px solid var(--km-border);
  border-radius: var(--km-radius-sm);
  height: 140px;
  overflow-y: auto;
  padding: 10px;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 11px;
  color: #8fd18f;
  line-height: 1.5;
}
.log-box .err { color: #f28b8b; }
.log-box .warn { color: var(--km-pink); }

/* ---------- Progress bar ---------- */
.progress-bar {
  background: var(--km-surface-2);
  border-radius: 999px;
  height: 6px;
  overflow: hidden;
  margin-top: 14px;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--km-pink);
  transition: width 0.2s ease;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--km-border); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .stage { max-height: 70vh; }
}