:root {
  --bg: #0d1117;
  --bg-soft: #151b24;
  --bg-panel: #171e29;
  --border: #263041;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f8cff;
  --accent-2: #7c5cff;
  --danger: #ff6b6b;
  --ok: #3fb950;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 14px;
}

button, input, select { font-family: inherit; font-size: inherit; }

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  background: linear-gradient(90deg, var(--bg-soft), #10161f 60%);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .5px;
}

.logo {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.conn {
  display: flex;
  gap: 8px;
  flex: 1 1 460px;
}

.conn input, .conn select {
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #0f151d;
  color: var(--text);
  outline: none;
  transition: border-color .15s;
}

.conn input { flex: 1 1 150px; min-width: 130px; }
.conn select { max-width: 190px; }
.conn input:focus, .conn select:focus { border-color: var(--accent); }

button {
  cursor: pointer;
  border-radius: 9px;
  border: 1px solid var(--border);
  padding: 8px 14px;
  background: #1c2432;
  color: var(--text);
  transition: filter .15s, border-color .15s;
}

button:hover:not(:disabled) { filter: brightness(1.18); border-color: var(--accent); }
button:disabled { opacity: .45; cursor: not-allowed; }

button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  font-weight: 600;
}

button.ghost { background: transparent; }

.status { display: flex; align-items: center; gap: 8px; color: var(--muted); white-space: nowrap; }

.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--muted);
  box-shadow: 0 0 8px currentColor;
}
.dot.online { background: var(--ok); }
.dot.offline { background: var(--danger); }

/* ---------- 主区域 ---------- */
.container {
  padding: 16px;
  max-width: 1400px;
  margin: 0 auto;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.toolbar-actions { margin-left: auto; display: flex; gap: 8px; }

.crumbs { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; color: var(--muted); }
.crumbs button { padding: 2px 8px; border: none; background: transparent; color: var(--accent); }
.crumbs button:hover { background: #1e2735; }
.crumbs span.sep { color: var(--muted); }

/* ---------- 目录网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
}

.card {
  padding: 16px 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: transform .12s, border-color .12s, background .12s;
}

.card:hover { transform: translateY(-2px); border-color: var(--accent); background: #1b2231; }
.card.playable { border-color: #2c4a7c; background: linear-gradient(180deg, #1a2337, #171e29); }
.card.disabled { cursor: not-allowed; opacity: .5; }
.card.disabled:hover { transform: none; border-color: var(--border); }

.card-icon { font-size: 30px; line-height: 1.4; }

.card-name {
  margin-top: 6px;
  font-size: 13px;
  word-break: break-all;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta { margin-top: 4px; font-size: 12px; color: var(--muted); }

.empty { grid-column: 1 / -1; padding: 40px 14px; color: var(--muted); text-align: center; }

.panel-foot {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.panel-foot input {
  flex: 1;
  min-width: 0;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: #0f151d;
  color: var(--text);
  outline: none;
}
.panel-foot input:focus { border-color: var(--accent); }

.tips { margin-top: 14px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.tips p { margin: 0; }
.tips code { background: #1c2432; padding: 2px 6px; border-radius: 6px; color: var(--accent); }

/* ---------- 播放视图 ---------- */
.player-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.player-bar h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  flex: 1;
  min-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-wrap {
  position: relative;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

#video { width: 100%; height: 100%; display: block; background: #000; }

/* ---------- 帧预览浮层 ---------- */
.thumb-preview {
  position: absolute;
  bottom: 62px;
  width: 176px;
  padding: 4px;
  background: #0b0f16;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .6);
  pointer-events: none;
  z-index: 3;
}

.thumb-preview img {
  display: block;
  width: 100%;
  border-radius: 5px;
  background: #000;
  min-height: 60px;
}

.thumb-time {
  display: block;
  margin-top: 3px;
  text-align: center;
  font-size: 12px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ---------- 自定义控制条 ---------- */
.controls {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0), rgba(0, 0, 0, .78));
  transition: opacity .2s, transform .2s;
  z-index: 2;
}

.controls.fade-out { opacity: 0; transform: translateY(6px); pointer-events: none; }

.ctrl-btn {
  padding: 2px 8px;
  min-width: 30px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
}
.ctrl-btn:hover { filter: brightness(1.4); border-color: transparent; }

.progress {
  position: relative;
  flex: 1;
  height: 16px;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.progress-track {
  position: relative;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, .22);
  border-radius: 4px;
  overflow: hidden;
  transition: height .12s;
}

.progress:hover .progress-track { height: 7px; }

.progress-buffered { position: absolute; left: 0; top: 0; height: 100%; background: rgba(255, 255, 255, .32); }
.progress-played { position: absolute; left: 0; top: 0; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }

.progress-handle {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-left: -6px;
  border-radius: 50%;
  background: #fff;
  transform: translateY(-50%) scale(0);
  transition: transform .12s;
  pointer-events: none;
}

.progress:hover .progress-handle { transform: translateY(-50%) scale(1); }

.time-text {
  font-size: 12px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.volume { width: 76px; accent-color: var(--accent); }

.muted { color: var(--muted); font-size: 13px; word-break: break-all; }
.hidden { display: none !important; }

.alert {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--danger);
  background: rgba(255, 107, 107, .12);
  color: #ffb4b4;
}

@media (max-width: 720px) {
  .conn { flex-basis: 100%; flex-wrap: wrap; }
  .conn input, .conn select { flex-basis: 100%; max-width: none; }
}