/* ==========================================================================
   AnkiCraft · 旗舰级知识记忆工坊样式系统 (Editorial & Obsidian Studio)
   ========================================================================== */

/* ---------- 变量系统与主题 ---------- */
:root, [data-theme="light"] {
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-active: #e2e8f0;
  
  --border-subtle: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.16);
  --border-focus: #2563eb;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --primary: #1e293b;
  --primary-hover: #0f172a;
  --primary-text: #ffffff;
  
  --accent: #2563eb;
  --accent-soft: #eff6ff;
  --accent-border: #bfdbfe;
  
  --amber-soft: #fef3c7;
  --amber-text: #92400e;
  --amber-border: #fcd34d;
  
  --success: #10b981;
  --success-soft: #ecfdf5;
  --danger: #ef4444;
  --danger-soft: #fef2f2;
  
  --shadow-subtle: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 12px 24px -4px rgba(0, 0, 0, 0.06);
  --shadow-modal: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.05);
  
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 22px;
}

[data-theme="dark"] {
  --bg-app: #09090b;
  --bg-surface: #141417;
  --bg-surface-elevated: #1c1c21;
  --bg-subtle: #222227;
  --bg-active: #2e2e36;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-focus: #3b82f6;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --primary: #f8fafc;
  --primary-hover: #ffffff;
  --primary-text: #0f172a;
  
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.12);
  --accent-border: rgba(59, 130, 246, 0.28);
  
  --amber-soft: rgba(245, 158, 11, 0.12);
  --amber-text: #fbbf24;
  --amber-border: rgba(245, 158, 11, 0.3);
  
  --shadow-subtle: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.5), 0 4px 12px 0 rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.6), 0 16px 32px rgba(0, 0, 0, 0.4);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------- 顶栏 (Topbar) ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-wrap {
  width: 36px;
  height: 36px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #38bdf8;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .brand-logo-wrap {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
}

.brand-svg {
  width: 22px;
  height: 22px;
}

.brand-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-badge {
  font-size: 9px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent);
  color: #ffffff;
  letter-spacing: 0.05em;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 主题切换 */
.theme-toggle {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.theme-toggle:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }
.theme-toggle svg { width: 18px; height: 18px; }

/* 算力指示胶囊 */
.tier-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-secondary);
}

.chip-spark {
  color: #f59e0b;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.btn-spark {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.chip-divider {
  width: 1px;
  height: 12px;
  background: var(--border-strong);
}

.chip-regen {
  color: var(--accent);
  font-weight: 500;
}

/* PRO 升级按钮 */
.btn-pro {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  border: none;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
  transition: all 0.2s ease;
}

.btn-pro:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
}

.icon-arrow {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.btn-pro:hover .icon-arrow {
  transform: translateX(2px);
}

/* ---------- 主工作区布局 ---------- */
.workspace {
  display: grid;
  grid-template-columns: 430px 1fr;
  gap: 24px;
  max-width: 1480px;
  width: 100%;
  margin: 20px auto;
  padding: 0 24px;
  flex: 1;
  align-items: start;
}

/* ---------- 左侧高聚合控制中枢 ---------- */
.control-hub {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hub-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hub-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hub-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.input-tabs {
  display: flex;
  background: var(--bg-subtle);
  padding: 3px;
  border-radius: var(--r-md);
  gap: 2px;
}

.input-tab {
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.input-tab.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-subtle);
  font-weight: 600;
}

/* 样本推荐胶囊 */
.sample-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.sample-label {
  font-size: 11px;
  color: var(--text-muted);
}

.sample-pill {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.sample-pill:hover {
  background: var(--accent-soft);
  border-color: var(--accent-border);
  color: var(--accent);
}

/* 文本输入框与统计 */
.textarea-wrap {
  position: relative;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  background: var(--bg-app);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.textarea-wrap:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

textarea {
  width: 100%;
  min-height: 150px;
  max-height: 380px;
  padding: 14px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13.5px;
  line-height: 1.6;
  resize: vertical;
}

textarea:focus {
  outline: none;
}

.textarea-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  font-size: 11.5px;
  color: var(--text-muted);
}

.calc-indicator {
  color: var(--accent);
  font-weight: 500;
}

.clear-btn {
  background: transparent;
  border: none;
  font-size: 11px;
  color: var(--text-muted);
  cursor: pointer;
}
.clear-btn:hover { color: var(--danger); }

/* 拖拽上传 */
.dropzone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--r-lg);
  padding: 30px 16px;
  text-align: center;
  cursor: pointer;
  background: var(--bg-app);
  transition: all 0.2s ease;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop-icon {
  color: var(--text-muted);
  margin-bottom: 6px;
}

.drop-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.drop-desc {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.parsed-file-card {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--success-soft);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
}

.file-name { font-weight: 600; color: #065f46; }
.file-stat { margin-left: 8px; color: #047857; }
.file-remove {
  background: transparent;
  border: none;
  color: #dc2626;
  font-size: 11px;
  cursor: pointer;
}

/* 参数矩阵 */
.param-matrix {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.param-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.param-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.param-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.param-hint {
  font-size: 10.5px;
  color: var(--text-muted);
}

/* 药丸单选组 */
.pill-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.pill-group.micro {
  grid-template-columns: repeat(3, 1fr);
}

.pill-btn {
  padding: 8px 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-app);
  border-radius: var(--r-md);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.pill-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.pill-btn.active {
  background: var(--primary);
  color: var(--primary-text);
  border-color: var(--primary);
  font-weight: 600;
}

.double-param {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 12px;
}

.sub-param {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.golden-rule-tip {
  font-size: 11.5px;
  color: var(--amber-text);
  background: var(--amber-soft);
  border: 1px solid var(--amber-border);
  border-radius: var(--r-md);
  padding: 10px 12px;
  line-height: 1.5;
}

/* 模板微缩选区 (Real Micro Preview Cards) */
.template-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.tpl-item {
  border: 1px solid var(--border-subtle);
  background: var(--bg-app);
  border-radius: var(--r-md);
  padding: 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: all 0.2s ease;
  position: relative;
}

.tpl-item:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.tpl-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent);
}

/* 微型排版卡片小样 */
.micro-card-preview {
  height: 52px;
  background: var(--bg-surface);
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  padding: 6px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.micro-line {
  height: 4px;
  border-radius: 2px;
  background: var(--border-strong);
}
.micro-line.primary { background: var(--text-primary); width: 65%; }
.micro-line.accent { background: var(--accent); width: 45%; }
.micro-line.badge { background: #bfdbfe; height: 5px; width: 35%; border-radius: 999px; }
.micro-line.cloze-mark { background: #fef08a; border: 1px solid #facc15; width: 50%; height: 6px; }

.tpl-info {
  display: flex;
  flex-direction: column;
}

.tpl-name {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-primary);
}

.tpl-tag {
  font-size: 9.5px;
  color: var(--text-muted);
}

/* 主生成按钮 */
.action-footer {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.generate-main-btn {
  width: 100%;
  padding: 13px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: #ffffff;
  border: none;
  border-radius: var(--r-lg);
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2);
  transition: all 0.2s ease;
}

[data-theme="dark"] .generate-main-btn {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
}

.generate-main-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

.generate-main-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* 加载动画 */
.loading-state {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--bg-subtle);
  border-radius: var(--r-md);
}

.loading-spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-strong);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  display: flex;
  flex-direction: column;
}

.loading-step {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
}

.loading-sub {
  font-size: 10.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   右侧视窗：真实卡片工坊与沉浸视窗
   ========================================================================== */
.card-stage {
  min-height: 600px;
}

/* 空状态活体展示展台 */
.showcase-empty-state {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 12px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent);
}

.showcase-heading {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.showcase-sub {
  font-size: 13px;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.6;
  margin-bottom: 24px;
}

/* 活体演示卡片 */
.live-demo-card-wrap {
  width: 100%;
  max-width: 480px;
  perspective: 1200px;
  margin-bottom: 30px;
  cursor: pointer;
}

.live-card-inner {
  display: grid;
  grid-template-areas: "cardlayer";
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.live-card-inner.flipped {
  transform: rotateY(180deg);
}

.live-card-face {
  grid-area: cardlayer;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hover);
  padding: 28px 24px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  text-align: left;
}

.live-card-face.back {
  transform: rotateY(180deg);
}

.card-tpl-tag {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.live-card-front-title {
  font-family: Newsreader, Georgia, serif;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.live-card-front-title.mini {
  font-size: 22px;
  margin-bottom: 4px;
}

.live-card-phonetic {
  font-family: Newsreader, Georgia, serif;
  font-size: 16px;
  font-style: italic;
  color: var(--text-muted);
  margin-top: 4px;
  margin-bottom: 20px;
}

.live-card-hint {
  font-size: 11.5px;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 6px 10px;
  border-radius: var(--r-sm);
  align-self: flex-start;
}

.hint-key {
  font-weight: 700;
  color: var(--text-primary);
}

.live-card-pos-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.live-card-def {
  font-size: 14.5px;
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.live-card-example {
  font-style: italic;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  font-size: 13px;
  margin-bottom: 16px;
}

.live-card-license {
  font-size: 10px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 10px;
  text-align: center;
}

.showcase-features-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
}

.feat-item {
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 16px;
  text-align: left;
}

.feat-icon {
  color: var(--accent);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
}

.feat-title {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.feat-desc {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   卡片工作台 (Workshop Toolbar & Modes)
   ========================================================================== */
.workshop-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.workshop-toolbar {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-subtle);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.deck-meta-block {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.deck-name-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
}

.icon-edit-deck {
  color: var(--text-muted);
}

.deck-name-input {
  font-size: 14px;
  font-weight: 700;
  border: none;
  background: transparent;
  color: var(--text-primary);
  outline: none;
  width: 140px;
}

.deck-stat-pills {
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-pill {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.meta-pill.quality-ok {
  background: var(--success-soft);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* 视图切换器 */
.view-switcher {
  display: flex;
  background: var(--bg-subtle);
  padding: 3px;
  border-radius: var(--r-md);
  gap: 2px;
}

.view-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.view-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-subtle);
  font-weight: 600;
}

.tool-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  border-radius: var(--r-md);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.tool-action-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.tool-action-btn.primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  font-weight: 600;
}

.tool-action-btn.primary:hover {
  filter: brightness(1.08);
}

/* ==========================================================================
   卡片流模式 (Stream Grid & CSS Grid Overlap Architecture)
   ========================================================================== */
.card-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* 单张卡片外容器 */
.card-item {
  position: relative;
  perspective: 1200px;
  border-radius: var(--r-lg);
  transition: transform 0.2s ease;
}

/* 核心防穿模技术：CSS Grid 双面共享最大内容高度 */
.card-inner {
  display: grid;
  grid-template-areas: "cardlayer";
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
  width: 100%;
}

.card-inner.flipped {
  transform: rotateY(180deg);
}

.card-face {
  grid-area: cardlayer;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-card);
  padding: 22px 24px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card-face:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--border-strong);
}

.card-face.back {
  transform: rotateY(180deg);
  background: var(--bg-surface-elevated);
}

/* 卡片操作悬浮条 */
.card-action-bar {
  position: absolute;
  top: 10px;
  right: 12px;
  z-index: 10;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.card-item:hover .card-action-bar {
  opacity: 1;
}

.card-act-btn {
  width: 28px;
  height: 28px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
}

.card-act-btn:hover {
  background: var(--bg-active);
  color: var(--text-primary);
}

.card-act-btn.danger:hover {
  color: var(--danger);
  border-color: var(--danger);
}

/* ---------- 真实模板排版细节注入 ---------- */
/* 现代简约风 (Modern QA) */
.tpl-modern .face-kicker {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.tpl-modern .front-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.6;
}

.tpl-modern .back-text {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.7;
}

.tpl-modern .card-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 12px 0;
}

/* 学术雅致风 (Elegant Vocab) */
.tpl-vocab .vocab-word {
  font-family: Newsreader, Georgia, serif;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.tpl-vocab .vocab-phonetic {
  font-family: Newsreader, Georgia, serif;
  font-size: 15px;
  font-style: italic;
  color: var(--text-muted);
  margin: 4px 0 12px;
}

.tpl-vocab .vocab-pos-badge {
  align-self: flex-start;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  padding: 1px 10px;
  margin-bottom: 8px;
}

.tpl-vocab .vocab-def {
  font-size: 15px;
  color: var(--text-primary);
  line-height: 1.6;
}

.tpl-vocab .vocab-example {
  font-style: italic;
  color: var(--text-secondary);
  border-left: 3px solid var(--accent);
  padding-left: 12px;
  font-size: 13px;
  margin-top: 10px;
}

/* 荧光高亮填空风 (Cloze Highlight) */
.tpl-cloze .cloze-body {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-primary);
}

.cloze-mask {
  display: inline-block;
  background: #fde68a;
  border: 1px dashed #d97706;
  color: transparent;
  padding: 0 8px;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

[data-theme="dark"] .cloze-mask {
  background: rgba(245, 158, 11, 0.25);
  border-color: #f59e0b;
}

.cloze-mask.revealed {
  background: #fef08a;
  border-style: solid;
  color: #78350f;
}

[data-theme="dark"] .cloze-mask.revealed {
  background: rgba(245, 158, 11, 0.35);
  color: #fef3c7;
}

.tpl-license-footer {
  margin-top: 16px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  font-size: 10px;
  color: var(--text-muted);
  text-align: center;
}

/* 编辑态 */
.card-edit-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-focus);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hover);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-edit-box label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
}

.card-edit-box textarea {
  min-height: 70px;
  font-size: 13.5px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  padding: 8px;
  background: var(--bg-app);
}

.edit-btn-row {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

/* ==========================================================================
   沉浸背卡模式 (Focus Study Mode)
   ========================================================================== */
.study-stage-wrap {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 680px;
  margin: 0 auto;
}

.study-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--bg-subtle);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 8px;
}

.study-progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s ease;
}

.study-counter {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.study-card-viewport {
  width: 100%;
  perspective: 1200px;
  margin-bottom: 20px;
  cursor: pointer;
}

.study-card-inner {
  display: grid;
  grid-template-areas: "studylayer";
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  min-height: 260px;
}

.study-card-inner.flipped {
  transform: rotateY(180deg);
}

.study-card-face {
  grid-area: studylayer;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-hover);
  padding: 36px 30px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.study-card-face.back {
  transform: rotateY(180deg);
}

.study-keyboard-guide {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 10px;
  font-family: inherit;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  box-shadow: 0 1px 0 var(--border-strong);
}

.anki-grading-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  width: 100%;
}

.grade-btn {
  padding: 10px 6px;
  border-radius: var(--r-md);
  font-size: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: all 0.15s ease;
}

.grade-btn .k-hint {
  font-size: 10px;
  opacity: 0.6;
}

.grade-btn.again { background: #fee2e2; color: #991b1b; border-color: #fecaca; }
.grade-btn.hard { background: #fef3c7; color: #92400e; border-color: #fde68a; }
.grade-btn.good { background: #dbeafe; color: #1e40af; border-color: #bfdbfe; }
.grade-btn.easy { background: #dcfce7; color: #166534; border-color: #bbf7d0; }

[data-theme="dark"] .grade-btn.again { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
[data-theme="dark"] .grade-btn.hard { background: rgba(245, 158, 11, 0.2); color: #fde68a; }
[data-theme="dark"] .grade-btn.good { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
[data-theme="dark"] .grade-btn.easy { background: rgba(16, 185, 129, 0.2); color: #86efac; }

.grade-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

/* ==========================================================================
   弹窗体系 (Pricing Modal & Export Modal)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-modal);
  padding: 32px;
  width: 100%;
  max-width: 500px;
  position: relative;
}

.pricing-modal-box {
  max-width: 860px;
}

.modal-close-icon {
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 16px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}
.modal-close-icon:hover { color: var(--text-primary); }

.modal-head.text-center { text-align: center; }
.modal-kicker {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 6px;
}
.modal-head h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}
.modal-head p {
  font-size: 13px;
  color: var(--text-muted);
}

/* 定价卡片三列 */
.pricing-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0 20px;
}

.pricing-card {
  border: 1px solid var(--border-subtle);
  background: var(--bg-app);
  border-radius: var(--r-lg);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.pricing-card.featured {
  border-color: var(--accent);
  background: var(--bg-surface);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.15);
}

.pricing-badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.pricing-badge.hot {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
  border: none;
}

.pricing-tier-name {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.pricing-price {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.pricing-price .period {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
}

.pricing-caption {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.pricing-feat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 22px;
  flex: 1;
}

.pricing-feat-list li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.pricing-feat-list .check {
  color: var(--accent);
  font-weight: 800;
}

.pricing-btn {
  padding: 10px;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.pricing-btn.featured-btn {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.pricing-btn.highlight-btn {
  background: var(--primary);
  color: var(--primary-text);
  border-color: var(--primary);
}

.pricing-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

.pricing-footer-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* 导出引导 Tabs */
.modal-success-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--success);
  background: var(--success-soft);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.guide-tabs {
  display: flex;
  background: var(--bg-subtle);
  padding: 4px;
  border-radius: var(--r-md);
  gap: 4px;
  margin: 18px 0 14px;
}

.guide-tab {
  flex: 1;
  padding: 6px 8px;
  font-size: 12px;
  font-weight: 500;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.guide-tab.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: var(--shadow-subtle);
}

.guide-content {
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-secondary);
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-lg);
  padding: 16px;
  margin-bottom: 20px;
  min-height: 110px;
}

.modal-actions {
  display: flex;
  gap: 10px;
}

.primary-btn {
  padding: 10px 16px;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: var(--r-md);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.primary-btn:hover { filter: brightness(1.08); }

.ghost-btn {
  padding: 10px 16px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}
.ghost-btn:hover { background: var(--bg-active); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .workspace { grid-template-columns: 1fr; }
  .control-hub { max-width: 720px; margin: 0 auto; width: 100%; }
}