/* ===== GLB 3D 模型查看器 样式 ===== */
:root {
  --bg: #0e1116;
  --bg-panel: #151a22;
  --bg-panel-2: #1b222d;
  --border: #2a3340;
  --text: #e8edf3;
  --text-dim: #8b98a9;
  --accent: #4f8cff;
  --accent-2: #22d3ee;
  --danger: #ef4444;
  --radius: 10px;
  --shadow: 0 8px 30px rgba(0,0,0,.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; overflow: hidden; }

body {
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

/* ---------- 顶部栏 ---------- */
.topbar {
  height: 56px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: linear-gradient(90deg, #12161d, #161c26);
  border-bottom: 1px solid var(--border);
  user-select: none;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo {
  width: 30px; height: 30px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 8px; color: #fff; font-size: 16px;
}
.brand-name { font-size: 16px; font-weight: 600; letter-spacing: .5px; }
.top-actions { display: flex; gap: 10px; }

/* ---------- 按钮 ---------- */
.btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-panel-2);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all .18s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #3b6fd8);
  border: none; color: #fff; font-weight: 600;
}
.btn-primary:hover { color: #fff; filter: brightness(1.12); }
.btn-danger {
  background: transparent;
  border: 1px solid rgba(239, 68, 68, .5);
  color: #f87171;
}
.btn-danger:hover { background: rgba(239, 68, 68, .12); border-color: var(--danger); color: var(--danger); }
.btn-compress {
  background: transparent;
  border: 1px solid rgba(34, 211, 238, .5);
  color: #22d3ee;
}
.btn-compress:hover { background: rgba(34, 211, 238, .12); border-color: #22d3ee; color: #22d3ee; }

/* ---------- 布局 ---------- */
.layout { flex: 1; display: flex; min-height: 0; }

/* ---------- 侧边栏 ---------- */
.sidebar {
  width: 300px;
  flex: none;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.sidebar-head { padding: 14px; border-bottom: 1px solid var(--border); }
.sidebar-head input {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  outline: none;
}
.sidebar-head input:focus { border-color: var(--accent); }
.sidebar-head input::placeholder { color: var(--text-dim); }
.filter-row { display: flex; align-items: center; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.filter-label { font-size: 12px; color: var(--text-dim); margin-right: 2px; }
.chip {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: transparent;
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all .15s;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.batch-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}
.batch-select-all {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}
.batch-select-all input { accent-color: var(--accent); cursor: pointer; }
.batch-count { flex: 1; font-size: 12px; color: var(--text-dim); text-align: right; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-export {
  background: transparent;
  border: 1px solid rgba(52, 211, 153, .5);
  color: #34d399;
}
.btn-export:hover { background: rgba(52, 211, 153, .12); border-color: #34d399; color: #34d399; }

.model-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}
.model-list::-webkit-scrollbar { width: 8px; }
.model-list::-webkit-scrollbar-thumb { background: #2c3644; border-radius: 4px; }

.model-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background .15s;
  margin-bottom: 4px;
  border: 1px solid transparent;
}
.model-item:hover { background: var(--bg-panel-2); }
.model-item.active {
  background: rgba(79, 140, 255, .12);
  border-color: rgba(79, 140, 255, .45);
}
.model-item.selected {
  border-color: var(--accent);
  background: rgba(79, 140, 255, .10);
}
.model-check {
  flex: none;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text-dim);
}
.model-checkbox {
  width: 16px; height: 16px;
  cursor: pointer;
  accent-color: var(--accent);
}
.model-thumb {
  width: 40px; height: 40px;
  border-radius: 8px;
  background: var(--bg-panel-2);
  display: grid; place-items: center;
  flex: none;
  overflow: hidden;
  color: var(--text-dim);
  font-size: 18px;
  border: 1px solid var(--border);
}
.model-thumb img { width: 100%; height: 100%; object-fit: cover; }
.model-meta { flex: 1; min-width: 0; }
.model-name {
  font-size: 13px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.model-sub { font-size: 11px; color: var(--text-dim); margin-top: 2px; display: flex; gap: 6px; align-items: center; }
.model-badge {
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  background: rgba(34, 211, 238, .15);
  color: var(--accent-2);
}
.model-delete {
  opacity: 0;
  color: var(--text-dim);
  border: none; background: none;
  font-size: 14px; cursor: pointer;
  padding: 4px;
  transition: all .15s;
}
.model-item:hover .model-delete { opacity: 1; }
.model-delete:hover { color: var(--danger); }
.model-compress {
  opacity: 0;
  color: var(--text-dim);
  border: none; background: none;
  font-size: 13px; cursor: pointer;
  padding: 4px;
  transition: all .15s;
}
.model-item:hover .model-compress { opacity: 1; }
.model-compress:hover { color: var(--accent-2); }

.list-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  padding: 40px 20px;
  line-height: 1.8;
}

/* ---------- 查看区 ---------- */
.viewer { flex: 1; position: relative; min-width: 0; background: radial-gradient(ellipse at 50% 40%, #131a24, #0b0e13); }
#glCanvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.empty-state {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 10px;
  color: var(--text-dim);
  pointer-events: none;
  text-align: center;
  padding: 20px;
}
.empty-icon { font-size: 56px; opacity: .5; }
.empty-state h2 { font-size: 20px; font-weight: 600; color: var(--text-dim); }
.empty-state p { font-size: 13px; opacity: .7; }

/* 加载遮罩 */
.loading {
  position: absolute; inset: 0;
  background: rgba(11, 14, 19, .55);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 14px;
  color: var(--text);
  font-size: 14px;
  z-index: 5;
}
.spinner {
  width: 42px; height: 42px;
  border: 3px solid rgba(79,140,255,.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 工具栏 */
.viewer-toolbar {
  position: absolute;
  bottom: 18px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(21, 26, 34, .88);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 6px 8px;
  box-shadow: var(--shadow);
  z-index: 4;
}
.tool-btn {
  width: 36px; height: 36px;
  border: none; border-radius: 8px;
  background: transparent;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  transition: all .15s;
  display: grid; place-items: center;
}
.tool-btn:hover { background: var(--bg-panel-2); color: var(--text); }
.tool-btn.active { color: var(--accent); background: rgba(79,140,255,.12); }
.toolbar-sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }

/* 模型信息面板 */
.model-info {
  position: absolute;
  top: 16px; right: 16px;
  background: rgba(21, 26, 34, .92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  min-width: 240px;
  z-index: 4;
  box-shadow: var(--shadow);
}
.model-info h3 { font-size: 14px; margin-bottom: 10px; color: var(--accent-2); }
.model-info .kv { display: flex; justify-content: space-between; padding: 4px 0; font-size: 12px; }
.model-info .kv span:first-child { color: var(--text-dim); }
.model-info .kv span:last-child { color: var(--text); }
.model-info .close { position: absolute; top: 8px; right: 10px; background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 14px; }
.model-info .close:hover { color: var(--text); }

/* 拖拽遮罩 */
.drop-mask {
  position: absolute; inset: 0;
  background: rgba(79, 140, 255, .15);
  border: 3px dashed var(--accent);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  z-index: 10;
  pointer-events: none;
}
.drop-box {
  background: rgba(11, 14, 19, .85);
  padding: 30px 50px;
  border-radius: 16px;
  text-align: center;
  font-size: 16px;
  border: 1px solid var(--accent);
}
.drop-icon { font-size: 40px; margin-bottom: 8px; color: var(--accent); }

/* Toast */
.toast {
  position: absolute;
  top: 16px; left: 50%;
  transform: translateX(-50%);
  background: rgba(21,26,34,.95);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 20;
  box-shadow: var(--shadow);
  animation: toastIn .25s ease;
}
.toast.error { border-color: var(--danger); color: #fca5a5; }
.toast.success { border-color: #22c55e; color: #86efac; }
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(-8px);} to { opacity: 1; transform: translateX(-50%) translateY(0);} }

.hidden { display: none !important; }

/* 响应式 */
@media (max-width: 820px) {
  .sidebar { width: 220px; }
}
@media (max-width: 640px) {
  .sidebar { display: none; }
  .viewer-toolbar { bottom: 10px; }
}