/* ============================================================
   Blender-Style UI Theme — Orange Accent (Flat)
   模仿 Blender 3D 视图的深色紧凑界面风格 — 扁平按钮
   主色: Blender Orange #E87D0D
   ============================================================ */

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

:root {
  /* ---- 基础色板 ---- */
  --bg-base: #1c1c1c;
  --bg-panel: #242424;
  --bg-header: #2b2b2b;
  --bg-input: #161616;

  /* ---- 按钮色阶 (扁平风格) ---- */
  --btn-bg: #333333;
  --btn-bg-hover: #404040;
  --btn-bg-active: #262626;

  /* ---- 选中/高亮 (Blender Orange) ---- */
  --accent: #e87d0d;
  --accent-hover: #ff9500;
  --accent-dark: #c46500;
  --accent-dim: #8a4a00;
  --selected-bg: rgba(232, 125, 13, 0.22);
  --selected-border: rgba(232, 125, 13, 0.5);

  /* ---- 边框 ---- */
  --border: #3a3a3a;
  --border-light: #505050;
  --border-dark: #0d0d0d;
  --border-mid: #2a2a2a;

  /* ---- 文字 ---- */
  --text: #d9d9d9;
  --text-bright: #f0f0f0;
  --text-dim: #9e9e9e;
  --text-muted: #666;
  --text-selected: #fff;

  /* ---- 字体 ---- */
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", Inter, system-ui, sans-serif;
  --font-mono: "Consolas", "Cascadia Code", "JetBrains Mono", monospace;
}

html, body {
  width: 100%; height: 100%; overflow: hidden;
  font-family: var(--font);
  background: var(--bg-base);
  color: var(--text);
  font-size: 12px;
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

#app { position: fixed; inset: 0; }
#app canvas { display: block; }

/* ============================================================
   顶部菜单栏 / 工具栏 (Blender 扁平风格)
   ============================================================ */
#toolbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; align-items: center; gap: 0;
  height: 28px;
  padding: 0 4px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-dark);
  font-size: 11px;
  line-height: 1;
}

#toolbar button {
  background: transparent;
  color: var(--text);
  border: none;
  padding: 0 10px;
  height: 28px;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  transition: background .06s;
  letter-spacing: .2px;
  border-radius: 0;
}

#toolbar button:hover {
  background: var(--btn-bg-hover);
}

#toolbar button:active {
  background: var(--btn-bg-active);
}

#toolbar .sep {
  width: 1px; height: 16px;
  background: var(--border);
  margin: 0 4px;
  align-self: center;
}

#toolbar .row {
  display: flex; align-items: center; gap: 6px;
  height: 28px;
  padding: 0 8px;
  border-left: 1px solid var(--border);
}

#toolbar .row.check {
  cursor: pointer;
  padding-right: 10px;
}

#toolbar .row.check input { margin-right: 3px; }

#toolbar label {
  color: var(--text-dim);
  font-size: 11px;
}

#toolbar input[type=range] {
  width: 90px;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--bg-input);
  border: 1px solid var(--border-dark);
  border-radius: 0;
  outline: none;
}

#toolbar input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px; height: 14px;
  background: var(--btn-bg);
  border: 1px solid var(--border-light);
  border-radius: 0;
  cursor: pointer;
}

#toolbar input[type=range]::-webkit-slider-thumb:hover {
  background: var(--accent);
  border-color: var(--accent);
}

#toolbar input[type=checkbox] {
  accent-color: var(--accent);
  width: 12px; height: 12px;
  cursor: pointer;
}

#toolbar b {
  min-width: 30px;
  text-align: right;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
}

#status {
  margin-left: auto;
  padding: 0 12px;
  color: var(--text-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  height: 28px;
  line-height: 28px;
  border-left: 1px solid var(--border);
}

/* ============================================================
   侧边面板 (Blender N-Panel 风格)
   ============================================================ */
.panel {
  position: fixed;
  top: 28px;
  z-index: 15;
  width: 240px;
  max-height: calc(100vh - 60px);
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--border-dark);
  border-top: none;
  font-size: 11px;
  color: var(--text);
}

#panel-left {
  left: 0;
  border-right: 1px solid var(--border-dark);
  border-left: none;
}

#panel-right {
  right: 0;
  border-left: 1px solid var(--border-dark);
  border-right: none;
}

/* OBJ 面板放在左下角 */
#panel-obj {
  left: 0;
  top: auto;
  bottom: 24px;
  width: 240px;
  max-height: 45vh;
  border: 1px solid var(--border-dark);
  border-left: none;
}

/* 面板标题栏 — Blender 折叠区标题 */
.panel h3 {
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  padding: 5px 10px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-dark);
  text-transform: uppercase;
  letter-spacing: .6px;
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 6px;
}

.panel h3::before {
  content: "▼";
  font-size: 8px;
  color: var(--accent);
  transition: transform .15s;
}

/* 面板内容 */
.panel > *:not(h3) {
  padding: 0 10px;
}

.panel .kv { padding: 8px 10px; }

.panel .kv div {
  display: flex;
  justify-content: space-between;
  padding: 2px 0;
  border-bottom: 1px solid rgba(255,255,255,.03);
  line-height: 1.5;
}

.panel .kv div:last-child { border-bottom: none; }

.panel .kv div span {
  color: var(--text-dim);
}

.panel .kv div b {
  color: var(--text-bright);
  font-weight: 500;
  font-family: var(--font-mono);
}

.panel .ent span { color: var(--text-dim); }
.panel .ent b { color: var(--accent); font-family: var(--font-mono); }

/* ============================================================
   底部状态栏 (Blender 风格)
   ============================================================ */
#help {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 15;
  display: flex;
  gap: 0;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  background: var(--bg-header);
  border-top: 1px solid var(--border-dark);
  font-size: 11px;
  color: var(--text-dim);
}

#help b {
  color: var(--text-bright);
  font-weight: 600;
}

#help > span {
  padding: 0 10px;
  border-right: 1px solid var(--border);
  height: 24px;
  line-height: 24px;
}

#help > span:last-child {
  border-right: none;
  flex: 1;
  text-align: center;
}

#fps {
  color: var(--text-bright);
  font-family: var(--font-mono);
  min-width: 28px;
  display: inline-block;
  font-weight: 500;
}

/* ============================================================
   滚动条 (Blender 扁平风格)
   ============================================================ */
.panel::-webkit-scrollbar { width: 10px; }
.panel::-webkit-scrollbar-track {
  background: var(--bg-panel);
  border-left: 1px solid var(--border-dark);
}
.panel::-webkit-scrollbar-thumb {
  background: var(--btn-bg);
  border-radius: 0;
  min-height: 30px;
}
.panel::-webkit-scrollbar-thumb:hover {
  background: var(--btn-bg-hover);
}
.panel::-webkit-scrollbar-thumb:active {
  background: var(--accent);
}
.panel::-webkit-scrollbar-corner { background: var(--bg-panel); }

/* ============================================================
   OBJ 对象管理面板
   ============================================================ */

/* 变换模式按钮组 — Blender 扁平风格 */
.obj-toolbar {
  display: flex;
  gap: 0;
  margin: 8px 10px;
  border: 1px solid var(--border);
  background: var(--bg-input);
}

.obj-toolbar .mode-btn {
  flex: 1;
  background: transparent;
  color: var(--text-dim);
  border: none;
  border-right: 1px solid var(--border);
  padding: 5px 0;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  transition: background .06s, color .06s;
  text-align: center;
}

.obj-toolbar .mode-btn:last-child {
  border-right: none;
}

.obj-toolbar .mode-btn:hover {
  background: var(--btn-bg-hover);
  color: var(--text-bright);
}

.obj-toolbar .mode-btn.active {
  background: var(--accent);
  color: var(--text-selected);
}

/* 缩放滑杆行 */
.obj-scale-row {
  padding: 0 10px 8px;
}

.obj-scale-row label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-dim);
}

.obj-scale-row input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 3px;
  background: var(--bg-input);
  border: 1px solid var(--border-dark);
  outline: none;
}

.obj-scale-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 12px; height: 14px;
  background: var(--btn-bg);
  border: 1px solid var(--border-light);
  border-radius: 0;
  cursor: pointer;
}

.obj-scale-row input[type=range]::-webkit-slider-thumb:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.obj-scale-row b {
  min-width: 38px;
  text-align: right;
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11px;
}

/* 对象列表 */
.obj-list {
  margin: 0 10px 8px;
  max-height: 180px;
  overflow-y: auto;
  border: 1px solid var(--border);
  background: var(--bg-input);
}

.obj-list .empty {
  text-align: center;
  color: var(--text-muted);
  padding: 18px 0;
  font-size: 11px;
  font-style: italic;
}

.obj-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 4px 8px;
  cursor: pointer;
  border-bottom: 1px solid rgba(255,255,255,.03);
  transition: background .06s;
}

.obj-item:hover { background: rgba(255,255,255,.05); }

.obj-item.selected {
  background: var(--selected-bg);
  border-left: 3px solid var(--accent);
  padding-left: 5px;
}

.obj-item.selected .obj-name { color: var(--text-selected); }

.obj-item-header {
  display: flex;
  align-items: center;
  gap: 6px;
}

.obj-item .obj-name {
  flex: 1;
  font-size: 11px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.obj-item .obj-vis {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 12px;
  padding: 0 2px;
  color: var(--text-dim);
}

.obj-item .obj-vis:hover { color: var(--accent); }

/* MTL 标签 */
.mtl-badge {
  font-size: 9px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(232, 125, 13, 0.15);
  border: 1px solid rgba(232, 125, 13, 0.35);
  padding: 0 4px;
  letter-spacing: .5px;
  text-transform: uppercase;
  line-height: 14px;
}

/* 材质列表 */
.obj-mat-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 4px;
}

.obj-mat-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
}

.mat-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 0;
  border: 1px solid rgba(255,255,255,.15);
  flex-shrink: 0;
}

.mat-name {
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.mat-tex { font-size: 10px; color: var(--accent); }

.obj-mat-more {
  font-size: 10px;
  color: var(--text-muted);
  padding-left: 15px;
}

/* 操作按钮 — 扁平风格 */
.obj-actions {
  display: flex;
  gap: 0;
  margin: 0 10px 8px;
  border: 1px solid var(--border);
  background: var(--bg-input);
}

.obj-actions button {
  flex: 1;
  background: transparent;
  color: var(--text);
  border: none;
  border-right: 1px solid var(--border);
  padding: 5px 0;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  transition: background .06s;
}

.obj-actions button:last-child {
  border-right: none;
}

.obj-actions button:hover {
  background: var(--btn-bg-hover);
}

.obj-actions button:active {
  background: var(--btn-bg-active);
}

/* ============================================================
   模态对话框 (Blender 风格)
   ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal.hidden { display: none; }

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.modal-box {
  position: relative;
  width: 320px;
  background: var(--bg-panel);
  border: 1px solid var(--border-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
  font-size: 12px;
  color: var(--text);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  height: 28px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-dark);
}

.modal-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--text);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  width: 22px;
  height: 22px;
}

.modal-close:hover {
  background: var(--btn-bg-hover);
  color: var(--text-bright);
}

.modal-body {
  padding: 12px;
}

/* 表单行 */
.form-row {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  gap: 8px;
}

.form-row label {
  width: 80px;
  color: var(--text-dim);
  font-size: 11px;
  text-align: right;
}

.form-row input[type=number] {
  flex: 1;
  height: 24px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-bright);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 0 8px;
  outline: none;
  text-align: right;
}

.form-row input[type=number]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(232, 125, 13, 0.3);
}

/* 预设按钮组 */
.form-preset {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.form-preset > span {
  width: 80px;
  color: var(--text-dim);
  font-size: 11px;
  text-align: right;
  margin-right: 8px;
}

.preset-btn {
  flex: 1;
  background: var(--btn-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-right: none;
  padding: 4px 0;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  transition: background .06s;
}

.preset-btn:last-child {
  border-right: 1px solid var(--border);
}

.preset-btn:hover {
  background: var(--btn-bg-hover);
}

.preset-btn.active {
  background: var(--accent);
  color: var(--text-selected);
  border-color: var(--accent-dark);
}

/* 底部按钮 */
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0;
  padding: 8px 12px;
  background: var(--bg-header);
  border-top: 1px solid var(--border-dark);
}

.modal-footer button {
  height: 26px;
  padding: 0 16px;
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  border: 1px solid var(--border);
  border-right: none;
  background: var(--btn-bg);
  color: var(--text);
  transition: background .06s;
}

.modal-footer button:last-child {
  border-right: 1px solid var(--border);
}

.modal-footer button:hover {
  background: var(--btn-bg-hover);
}

.modal-footer button:active {
  background: var(--btn-bg-active);
}

.btn-primary {
  background: var(--accent) !important;
  border-color: var(--accent-dark) !important;
  color: var(--text-selected) !important;
}

.btn-primary:hover {
  background: var(--accent-hover) !important;
}

.btn-primary:active {
  background: var(--accent-dark) !important;
}

.btn-ghost {
  background: transparent !important;
}

/* ============================================================
   主界面 — Blender 风格 + 金狮背景
   ============================================================ */
.main-menu {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
  transition: opacity 0.3s ease;
  background: #1c1c1c;
}

.main-menu.hidden {
  opacity: 0;
  pointer-events: none;
}

.menu-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image: url('assets/lion_bg.png');
  background-size: auto 100%;
  background-position: right center;
  background-repeat: no-repeat;
  filter: brightness(0.35) contrast(1.2) saturate(0.6) grayscale(0.3);
  opacity: 0.7;
}

.menu-bg::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    linear-gradient(90deg, #1c1c1c 0%, rgba(73, 71, 71, 0.623) 30%, rgba(28, 28, 28, 0.7) 60%, rgba(28, 28, 28, 0.4) 100%);
}

.menu-vignette {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(232, 125, 13, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

.menu-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
  padding-left: 10vw;
  padding-top: 28px;
  width: 100%;
  animation: menuFadeIn 0.5s ease-out;
}

@keyframes menuFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.menu-title {
  display: flex;
  flex-direction: column;
  line-height: 1;
  margin-bottom: 8px;
}

.title-glow {
  font-size: 64px;
  font-weight: 700;
  color: var(--text-bright);
  font-family: var(--font);
  letter-spacing: 2px;
}

.title-glow .accent {
  color: var(--accent);
}

.title-sub {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 8px;
  color: var(--text-dim);
  margin-top: 6px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.menu-divider {
  width: 280px;
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 8px;
  width: 280px;
}

.menu-item {
  background: transparent;
  border: 1px solid transparent;
  border-left: 3px solid transparent;
  cursor: pointer;
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  font-family: var(--font);
  transition: background .08s ease, border-color .08s ease;
  position: relative;
  text-align: left;
  border-radius: 2px;
}

.menu-item:hover {
  background: var(--btn-bg-hover);
  border-left-color: var(--accent);
}

.menu-item:active {
  background: var(--btn-bg-active);
}

.menu-item-text {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--text-bright);
  font-family: var(--font);
}

.menu-item:hover .menu-item-text {
  color: #fff;
}

.menu-item-en {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-family: var(--font-mono);
  font-weight: 400;
}

.menu-item:hover .menu-item-en {
  color: var(--accent);
}

/* 语言切换按钮 - 稍微小一点，作为次级选项 */
.menu-item-lang {
  margin-top: 8px;
  padding-top: 12px;
  padding-bottom: 12px;
  border-top: 1px solid var(--border-mid);
}

.menu-item-lang .menu-item-text {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 1px;
}

.menu-item-lang .menu-item-en {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--accent);
  opacity: 0.8;
}

.menu-footer {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-muted);
  font-family: var(--font);
  text-transform: uppercase;
  z-index: 2;
}

.footer-brand {
  font-style: italic;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--text-dim);
  opacity: 0.6;
  font-family: "Georgia", "Times New Roman", serif;
}

/* 顶部菜单栏 (Blender 风格标题栏) */
.menu-topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 28px;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  padding: 0 12px;
  z-index: 10;
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--font);
}

.menu-topbar .brand {
  font-weight: 600;
  color: var(--text-bright);
}

.menu-topbar .brand .dot {
  color: var(--accent);
}

.menu-topbar .sep {
  width: 1px; height: 14px;
  background: var(--border);
  margin: 0 10px;
}

.menu-topbar .version {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 760px) {
  .panel { width: 180px; font-size: 10px; }
  #toolbar { height: auto; flex-wrap: wrap; padding: 2px 4px; }
  #toolbar button { height: 24px; padding: 0 8px; }
  #panel-obj { width: 200px; }
}