:root {
  --bg: #0f1115;
  --panel: #1a1d24;
  --panel-2: #22262f;
  --border: #2c313c;
  --text: #e6e9ef;
  --muted: #9aa3b2;
  --accent: #6c8cff;
  --accent-2: #4caf9a;
  --danger: #e5615b;
  --radius: 12px;
}

* { box-sizing: border-box; }

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

header {
  padding: 28px 24px 8px;
  max-width: 860px;
  margin: 0 auto;
}
header h1 { margin: 0; font-size: 1.6rem; }
header .sub { color: var(--muted); margin: 4px 0 0; }
.badge {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.badge.cloud { color: #7fd7c4; border-color: #2f5b52; }

main {
  max-width: 860px;
  margin: 0 auto;
  padding: 16px 24px 60px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.panel h2 { margin: 0 0 12px; font-size: 1.05rem; }
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.panel-head h2 { margin: 0; }

.count {
  display: inline-block;
  background: var(--panel-2);
  color: var(--muted);
  border-radius: 20px;
  padding: 1px 9px;
  font-size: 0.8rem;
  margin-left: 6px;
}

.row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 10px 0;
  flex-wrap: wrap;
}
.row label { color: var(--muted); min-width: 90px; }
.row.toggle { cursor: pointer; }
.row.toggle span { color: var(--text); }

select, input[type="range"] {
  accent-color: var(--accent);
}
select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
}
input[type="range"] { flex: 1; min-width: 160px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.9rem;
  text-decoration: none;
  transition: background 0.15s, border 0.15s;
}
.btn:hover { background: #2b303b; }
.btn.small { padding: 5px 11px; font-size: 0.82rem; }
.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  padding: 11px 20px;
}
.btn.primary:hover { background: #5877ee; }
.btn.primary:disabled { opacity: 0.5; cursor: not-allowed; }

.video-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.video-item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.video-item img {
  width: 96px;
  height: 54px;
  object-fit: cover;
  border-radius: 6px;
  background: #000;
  flex-shrink: 0;
}
.video-meta { flex: 1; min-width: 0; }
.video-meta .name {
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.video-meta .vol {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.8rem;
}
.video-meta .vol input { flex: 1; }
.video-actions { display: flex; flex-direction: column; gap: 4px; }
.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 6px;
  width: 30px; height: 26px;
  cursor: pointer;
  line-height: 1;
}
.icon-btn:hover { color: var(--text); border-color: var(--accent); }
.icon-btn.remove:hover { color: var(--danger); border-color: var(--danger); }

.hint { color: var(--muted); font-size: 0.82rem; margin: 8px 0 0; }
.track-name { color: var(--text); font-size: 0.9rem; }

.render-panel { text-align: center; }
.progress-wrap { margin-top: 16px; }
.progress-bar {
  height: 10px;
  background: var(--panel-2);
  border-radius: 20px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.4s ease;
}
.progress-msg { display: block; margin-top: 8px; color: var(--muted); font-size: 0.85rem; }

.result { margin-top: 18px; display: flex; flex-direction: column; align-items: center; gap: 12px; }
.result video { width: 100%; border-radius: 10px; background: #000; }
.error { color: var(--danger); margin-top: 12px; white-space: pre-wrap; text-align: left; font-size: 0.85rem; }