/* ============================================================
   STEAM Science Hub - 面向基础教育的科学学习开源社区平台
   设计系统 & 全局样式
   ============================================================ */

/* --- CSS Variables (Light Theme - Default) --- */
:root {
  /* Colors */
  --color-bg: #f0f4f8;
  --color-surface: #ffffff;
  --color-surface-hover: #f8fafc;
  --color-surface-alt: #f1f5f9;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-tertiary: #94a3b8;
  --color-accent: #6366f1;
  --color-accent-light: #818cf8;
  --color-accent-bg: #eef2ff;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  /* Subject Colors */
  --math-color: #ff6b6b;
  --physics-color: #4ecdc4;
  --chemistry-color: #45b7d1;
  --biology-color: #96ceb4;
  --geography-color: #ffd93d;
  --infotech-color: #06b6d4;

  /* Grade Colors */
  --primary-grade: #4caf50;
  --middle-grade: #2196f3;
  --high-grade: #9c27b0;

  /* Glass & Effects */
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --card-shadow-hover: 0 10px 40px rgba(0, 0, 0, 0.1);
  --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.04);
  --elevation-2: 0 4px 16px rgba(0, 0, 0, 0.08);
  --elevation-3: 0 12px 40px rgba(0, 0, 0, 0.12);

  /* Typography */
  --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 250ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --header-height: 64px;
  --sidebar-width: 260px;
  --max-content-width: 1200px;
}

/* --- Dark Theme --- */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-surface: #1e293b;
  --color-surface-hover: #263348;
  --color-surface-alt: #1a2332;
  --color-border: #334155;
  --color-border-light: #263348;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-tertiary: #64748b;
  --color-accent: #818cf8;
  --color-accent-light: #a5b4fc;
  --color-accent-bg: #1e1b4b;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(51, 65, 85, 0.5);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  --card-shadow-hover: 0 10px 40px rgba(0, 0, 0, 0.4);
  --elevation-1: 0 1px 2px rgba(0, 0, 0, 0.2);
  --elevation-2: 0 4px 16px rgba(0, 0, 0, 0.3);
  --elevation-3: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100dvh;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--color-text-tertiary);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-text-secondary); }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent-light); }

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--glass-shadow);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-base);
}
.card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: scale(0.97); }
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}
.btn-primary:hover {
  background: var(--color-accent-light);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: var(--color-surface-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-text-tertiary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.btn-sm { padding: var(--space-1) var(--space-3); font-size: var(--font-size-xs); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--font-size-base); }
.btn-icon {
  width: 40px; height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
}
.btn-icon.btn-sm { width: 32px; height: 32px; }

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}
.badge-primary { background: var(--color-accent-bg); color: var(--color-accent); }
.badge-success { background: #ecfdf5; color: var(--color-success); }
.badge-warning { background: #fffbeb; color: var(--color-warning); }

/* --- Tooltip --- */
.tooltip {
  position: relative;
}
.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-3);
  background: var(--color-text);
  color: var(--color-bg);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 100;
}
.tooltip:hover::after { opacity: 1; }

/* ============ HEADER ============ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-text);
  text-decoration: none;
}
.header-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-accent), #a855f7);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: white;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.header-nav a, .header-nav button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.header-nav a:hover, .header-nav button:hover,
.header-nav a.active, .header-nav button.active {
  color: var(--color-text);
  background: var(--color-surface-alt);
}
.header-nav a.active, .header-nav button.active {
  color: var(--color-accent);
  background: var(--color-accent-bg);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.header-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
}
.header-user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent), #a855f7);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
}

/* Mobile menu toggle */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  border-radius: var(--radius-md);
}

/* Xp bar in header */
.xp-bar-mini {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
}
.xp-bar-mini .xp-fill {
  width: 60px;
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.xp-bar-mini .xp-fill-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), #a855f7);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}
.xp-bar-mini .xp-text {
  font-weight: 600;
  color: var(--color-accent);
}

/* Theme toggle */
.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

/* Logout button */
#logoutBtn {
  padding: 4px 10px;
  font-size: var(--font-size-xs);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
#logoutBtn:hover {
  color: var(--color-error) !important;
  background: rgba(239, 68, 68, 0.08);
}

/* ============ MAIN CONTENT ============ */
.main-content {
  max-width: var(--max-content-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6);
  min-height: calc(100dvh - var(--header-height));
}

/* ============ VIEW: HOME ============ */
.hero-section {
  text-align: center;
  padding: var(--space-12) 0 var(--space-8);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-6);
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}
.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--color-accent), #a855f7, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-8);
}
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-10);
  margin-top: var(--space-10);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
}
.hero-stat {
  text-align: center;
}
.hero-stat-value {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--color-accent);
}
.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* Grade Selector */
.grade-selector {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
}
.grade-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  min-width: 120px;
}
.grade-btn .grade-icon { font-size: 2rem; }
.grade-btn .grade-age { font-size: var(--font-size-xs); opacity: 0.7; }
.grade-btn:hover {
  border-color: var(--color-accent-light);
  transform: translateY(-3px);
  box-shadow: var(--elevation-2);
}
.grade-btn.active {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
  color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.2);
}

/* Subject Grid */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}
.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
}
.subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}
.subject-card {
  position: relative;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: all var(--transition-base);
  overflow: hidden;
}
.subject-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--subject-color, var(--color-accent));
}
.subject-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}
.subject-card .subject-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-3);
}
.subject-card .subject-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
}
.subject-card .subject-count {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.subject-card .subject-apps {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

/* Knowledge Tree */
.knowledge-tree {
  margin-top: var(--space-4);
}
.kp-level {
  margin-bottom: var(--space-6);
}
.kp-level-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  padding-left: var(--space-2);
}
.kp-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
}
.kp-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.kp-item:hover {
  border-color: var(--color-accent-light);
  background: var(--color-surface-hover);
  transform: translateX(4px);
}
.kp-item .kp-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  margin-top: 6px;
  flex-shrink: 0;
}
.kp-item .kp-name {
  font-weight: 600;
  font-size: var(--font-size-sm);
}
.kp-item .kp-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}
.kp-item .kp-play-btn {
  margin-left: auto;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}
.kp-item .kp-play-btn:hover {
  background: var(--color-accent);
  color: white;
}

/* Featured Apps */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-10);
}
.featured-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.featured-card-banner {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.featured-card-body {
  padding: var(--space-5);
}
.featured-card-body h4 {
  font-size: var(--font-size-base);
  margin-bottom: var(--space-1);
}
.featured-card-body p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
}
.featured-card-tags {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.featured-card-tags .tag {
  padding: 2px 8px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.featured-card-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-top: 1px solid var(--color-border-light);
}
.featured-card-actions .stat {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}

/* ============ VIEW: APPS ============ */
.app-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-6);
  min-height: calc(100dvh - var(--header-height) - 100px);
}
.app-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  height: fit-content;
  position: sticky;
  top: calc(var(--header-height) + var(--space-6));
}
.app-sidebar-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  padding: 0 var(--space-2);
}
.app-sidebar-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.app-sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  color: var(--color-text);
}
.app-sidebar-item:hover { background: var(--color-surface-alt); }
.app-sidebar-item.active {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-weight: 600;
}
.app-sidebar-item .app-icon {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.app-main {
  flex: 1;
}
.app-canvas-area {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 500px;
}
.app-canvas-area canvas {
  display: block;
  width: 100%;
}
.app-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
}
.app-controls .control-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.app-controls label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
}
.app-controls select, .app-controls input[type="range"] {
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-xs);
}
.app-controls input[type="range"] { accent-color: var(--color-accent); }
.app-info {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.app-info h3 { font-size: var(--font-size-lg); margin-bottom: var(--space-1); }
.app-info p { font-size: var(--font-size-sm); color: var(--color-text-secondary); }

/* ============ VIEW: STUDIO (Three-Column AI Layout) ============ */
.studio-layout {
  display: grid;
  grid-template-columns: 300px 1fr 340px;
  gap: var(--space-4);
  min-height: calc(100dvh - var(--header-height) - 100px);
}

/* -- Left: AI Chat Panel -- */
.studio-ai-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.studio-ai-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface);
}
.studio-ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 250px;
}
.ai-msg {
  max-width: 90%;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  animation: fadeIn 0.3s ease;
}
.ai-msg.user {
  align-self: flex-end;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-bottom-right-radius: 4px;
}
.ai-msg.assistant {
  align-self: flex-start;
  background: var(--color-surface-alt);
  color: var(--color-text);
  border-bottom-left-radius: 4px;
}
.ai-msg .ai-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-bottom: var(--space-1);
  opacity: 0.7;
}
.studio-ai-input-area {
  padding: var(--space-3);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-2);
}
.studio-ai-input-area textarea {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  resize: none;
  min-height: 38px;
  max-height: 80px;
  transition: border-color var(--transition-fast);
}
.studio-ai-input-area textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}
.studio-ai-input-area .btn-send {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.studio-ai-input-area .btn-send:hover {
  background: var(--color-accent-light);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

/* -- Middle: Code Display -- */
.studio-code-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.studio-code-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
}
.studio-code-header .lang-badge {
  padding: 2px 8px;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.studio-code-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  min-height: 250px;
}
.studio-code-content pre {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  line-height: 1.7;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-word;
}
.studio-code-content code {
  font-family: var(--font-mono);
  background: transparent;
  padding: 0;
}
.studio-code-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  min-height: 250px;
  gap: var(--space-3);
}
.studio-code-empty .empty-icon { font-size: 3rem; }

/* -- Right: Preview Panel -- */
.studio-preview {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.studio-preview-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-surface);
}
.studio-preview-header .preview-expand-btn {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.studio-preview-header .preview-expand-btn:hover {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.studio-preview-canvas {
  flex: 1;
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
}
.studio-preview-canvas canvas { max-width: 100%; max-height: 100%; }
.studio-preview-canvas:hover { background: var(--color-surface-hover); }
.studio-actions {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* -- Preview Fullscreen Modal -- */
.preview-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 1001;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  animation: fadeIn 0.2s ease;
}
.preview-fullscreen canvas {
  max-width: 90vw;
  max-height: 85vh;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-3);
}
.preview-fullscreen .close-fullscreen {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  color: white;
  font-size: 1.3rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.preview-fullscreen .close-fullscreen:hover {
  background: rgba(255,255,255,0.25);
}

/* -- Draft Box in Studio -- */
.drafts-panel {
  border-top: 1px solid var(--color-border);
  padding: var(--space-3);
  background: var(--color-surface-alt);
}
.drafts-panel .drafts-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}
.drafts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.draft-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-xs);
  transition: all var(--transition-fast);
}
.draft-item:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}
.draft-item .draft-name {
  flex: 1;
  font-weight: 500;
}
.draft-item .draft-date {
  color: var(--color-text-tertiary);
  font-size: 0.7rem;
}

/* -- Save Modal Form -- */
.save-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.save-form .form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.save-form label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.save-form input, .save-form textarea, .save-form select {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}
.save-form input:focus, .save-form textarea:focus, .save-form select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}
.save-form textarea { min-height: 80px; resize: vertical; }

/* ============ VIEW: COMMUNITY ============ */
.community-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.community-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface-alt);
  padding: 3px;
  border-radius: var(--radius-lg);
}
.community-tab {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.community-tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--elevation-1);
}
.community-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.community-search input {
  border: none;
  background: none;
  outline: none;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  width: 200px;
}
.community-search input::placeholder { color: var(--color-text-tertiary); }
.community-filter-bar {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.filter-chip {
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
}
.filter-chip:hover { border-color: var(--color-accent); color: var(--color-accent); }
.filter-chip.active {
  background: var(--color-accent-bg);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-chip.reset-chip {
  border-color: var(--color-border);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.filter-chip.reset-chip:hover {
  border-color: var(--color-warning, #f59e0b);
  color: var(--color-warning, #f59e0b);
  background: rgba(245, 158, 11, 0.08);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}
.project-card {
  padding: var(--space-5);
}
.project-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.project-card-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: white;
  flex-shrink: 0;
}
.project-card-meta h4 {
  font-size: var(--font-size-base);
  margin-bottom: 1px;
}
.project-card-meta .author {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
}
.project-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  line-height: 1.5;
}
.project-card-tags {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-light);
}
.project-card-footer .stats {
  display: flex;
  gap: var(--space-3);
}
.project-card-footer .stat-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.project-card-footer .stat-btn:hover { color: var(--color-accent); background: var(--color-accent-bg); }
.project-card-footer .stat-btn.starred { color: #f59e0b; }

/* Overview - featured */
.featured-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.featured-banner-card {
  position: relative;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 180px;
  cursor: pointer;
  transition: all var(--transition-base);
}
.featured-banner-card:hover { transform: translateY(-2px); box-shadow: var(--card-shadow-hover); }
.featured-banner-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
  position: relative;
  z-index: 1;
}
.featured-banner-card p {
  font-size: var(--font-size-sm);
  opacity: 0.85;
  position: relative;
  z-index: 1;
}
.featured-banner-card .banner-bg {
  position: absolute;
  top: -20px;
  right: -20px;
  font-size: 8rem;
  opacity: 0.1;
}

/* ============ MEDIAPIPE POSE ============ */
.pose-container {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.pose-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  max-height: 500px;
  background: #000;
}
.pose-video-wrap video, .pose-video-wrap canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: contain;
}
.pose-video-wrap canvas {
  z-index: 2;
}
.pose-overlay {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 3;
  gap: var(--space-3);
}
.pose-status {
  padding: var(--space-1) var(--space-3);
  background: rgba(0,0,0,0.6);
  color: white;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  backdrop-filter: blur(8px);
}
.pose-status.active { background: rgba(16, 185, 129, 0.8); }
.pose-info {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}
.pose-exercises {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-3);
}
.pose-exercise {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}
.pose-exercise:hover { border-color: var(--color-accent); background: var(--color-accent-bg); }
.pose-exercise.active { border-color: var(--color-accent); background: var(--color-accent-bg); color: var(--color-accent); }
.pose-feedback {
  text-align: center;
  padding: var(--space-3);
  background: var(--color-accent-bg);
  border-radius: var(--radius-lg);
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
}

/* ============ MODAL ============ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: fadeIn 0.2s ease;
}
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  width: 100%;
  max-width: 800px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--elevation-3);
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 1;
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}
.modal-body {
  padding: var(--space-6);
}
.modal-close {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.modal-close:hover { background: var(--color-surface-hover); color: var(--color-text); }

/* ============ TOAST ============ */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.toast {
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--elevation-2);
  font-size: var(--font-size-sm);
  animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  max-width: 360px;
}
.toast.success { border-left: 4px solid var(--color-success); }
.toast.error { border-left: 4px solid var(--color-error); }

/* ============ Achievements Panel ============ */
.achievements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-3);
}
.achievement-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}
.achievement-item.unlocked { border-color: var(--color-success); }
.achievement-item.locked { opacity: 0.5; }
.achievement-item .ach-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
}
.achievement-item .ach-name { font-size: var(--font-size-sm); font-weight: 600; }
.achievement-item .ach-desc { font-size: var(--font-size-xs); color: var(--color-text-secondary); }

/* ============ SKELETON LOADING ============ */
.skeleton {
  background: linear-gradient(90deg, var(--color-surface-alt) 25%, var(--color-border-light) 50%, var(--color-surface-alt) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ============ ANIMATIONS ============ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100%); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.animate-fade-in { animation: fadeIn 0.5s ease; }
.animate-slide-up { animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1); }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-spin { animation: spin 1s linear infinite; }

/* Stagger children */
.stagger > * {
  opacity: 0;
  animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.stagger > *:nth-child(1) { animation-delay: 0.05s; }
.stagger > *:nth-child(2) { animation-delay: 0.1s; }
.stagger > *:nth-child(3) { animation-delay: 0.15s; }
.stagger > *:nth-child(4) { animation-delay: 0.2s; }
.stagger > *:nth-child(5) { animation-delay: 0.25s; }
.stagger > *:nth-child(6) { animation-delay: 0.3s; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
  .studio-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .studio-ai-panel { max-height: 200px; }
  .studio-code-panel { min-height: 200px; }
  .studio-preview { min-height: 250px; }
  .preview-fullscreen { padding: var(--space-4); }
}

@media (max-width: 768px) {
  :root { --header-height: 56px; }
  .header-nav { display: none; }
  .header-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-2);
  }
  .mobile-menu-btn { display: flex; }
  .main-content { padding: var(--space-4); }
  .hero-section { padding: var(--space-8) 0 var(--space-4); }
  .hero-stats { gap: var(--space-6); flex-wrap: wrap; }
  .grade-selector { gap: var(--space-2); }
  .grade-btn { padding: var(--space-3); min-width: 90px; }
  .subject-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .app-container { grid-template-columns: 1fr; }
  .app-sidebar { position: static; display: flex; gap: var(--space-2); overflow-x: auto; padding: var(--space-3); }
  .app-sidebar-title { display: none; }
  .app-sidebar-list { flex-direction: row; }
  .app-sidebar-item { white-space: nowrap; width: auto; }
  .featured-banner { grid-template-columns: 1fr; }
  .featured-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .community-header { flex-direction: column; align-items: stretch; }
  .community-search { width: 100%; }
  .community-search input { width: 100%; }
  .kp-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; }
  .grade-btn { min-width: 75px; padding: var(--space-2); font-size: var(--font-size-xs); }
  .grade-btn .grade-icon { font-size: 1.5rem; }
}

/* ============ PRINT / REDUCED MOTION ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ Review Stars ============ */
.stars { display: flex; gap: 2px; }
.stars .star { color: var(--color-border); font-size: var(--font-size-sm); cursor: pointer; transition: color var(--transition-fast); }
.stars .star.filled { color: #f59e0b; }
.stars .star:hover { color: #f59e0b; }

/* Review section */
.reviews-section { margin-top: var(--space-6); }
.review-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-light);
}
.review-item:last-child { border-bottom: none; }
.review-avatar {
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  background: var(--color-surface-alt);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: var(--font-size-xs);
  flex-shrink: 0;
}
.review-content { flex: 1; }
.review-user { font-weight: 600; font-size: var(--font-size-sm); }
.review-text { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: var(--space-1); }

/* Publish form */
.publish-form { display: flex; flex-direction: column; gap: var(--space-4); }
.publish-form input, .publish-form textarea, .publish-form select {
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}
.publish-form input:focus, .publish-form textarea:focus, .publish-form select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}
.publish-form textarea { min-height: 100px; resize: vertical; }

/* Stats section on home */
.stats-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
}
.stats-banner-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
}
.stats-banner-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }
.stats-banner-card .stat-icon { font-size: 2rem; margin-bottom: var(--space-2); }
.stats-banner-card .stat-num { font-size: var(--font-size-2xl); font-weight: 800; color: var(--color-accent); }
.stats-banner-card .stat-label { font-size: var(--font-size-sm); color: var(--color-text-secondary); }

/* View switching */
.view { display: none; animation: fadeIn 0.3s ease; }
.view.active { display: block; }

/* ============ PROFILE PANEL (个人档案) ============ */
.profile-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: linear-gradient(135deg, var(--color-accent-bg), var(--color-surface-alt));
  border-radius: var(--radius-xl);
}
.profile-avatar-large {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-accent), #a855f7);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}
.profile-header-info h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-1);
}
.profile-header-info .profile-bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.profile-fields {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.profile-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
}
.profile-field .field-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
}
.profile-field .field-value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}
.profile-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

/* ============ PROFILE LEVEL CARD ============ */
.profile-level-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
}

/* ============ PROFILE EDIT FORM ============ */
.profile-edit-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.edit-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.edit-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.edit-input,
.edit-select,
.edit-textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-sizing: border-box;
}
.edit-input:focus,
.edit-select:focus,
.edit-textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}
.edit-textarea {
  min-height: 60px;
  resize: vertical;
}
.edit-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}
.edit-error {
  padding: var(--space-2) var(--space-3);
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: var(--radius-md);
  color: #ef4444;
  font-size: var(--font-size-sm);
  font-weight: 500;
  animation: shake 0.4s ease;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-4px); }
  40% { transform: translateX(4px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.editable-avatar {
  transition: all var(--transition-fast);
}

/* ============ CHANGE PASSWORD PANEL ============ */
.change-pwd-panel {
  max-width: 460px;
  margin: 0 auto;
}
.change-pwd-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-5);
}
.change-pwd-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-4) 0 var(--space-5);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.change-pwd-divider::before,
.change-pwd-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}
.error-text {
  color: var(--color-error) !important;
  display: none;
}
.error-text.show {
  display: block;
}
/* Password rule chips */
.rule-chip {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  background: var(--color-surface-alt);
  color: var(--color-text-tertiary);
  transition: all var(--transition-fast);
}
.rule-chip.pass {
  background: rgba(16, 185, 129, 0.12);
  color: var(--color-success);
}
.rule-chip.fail {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
}
.change-pwd-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.change-pwd-status {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  animation: authFormIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.change-pwd-status.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.25);
}
.change-pwd-status.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(239, 68, 68, 0.25);
}
.spinner-sm {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 4px;
}

/* ============ XP RULES (经验规则) ============ */
.xp-rules-section {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}
.xp-rules-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.xp-rules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-2);
}
.xp-rule-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}
.xp-rule-item:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}
.xp-rule-item .xp-rule-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
}
.xp-rule-item .xp-rule-text {
  flex: 1;
}
.xp-rule-item .xp-rule-action {
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.xp-rule-item .xp-rule-desc {
  font-size: 0.7rem;
  color: var(--color-text-tertiary);
}
.xp-rule-item .xp-rule-value {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ============ TAG INPUT (标签输入) ============ */
.tag-input-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.tag-input-wrapper {
  display: flex;
  gap: var(--space-2);
}
.tag-input-wrapper input {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}
.tag-input-wrapper input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}
.tag-input-wrapper .btn-add-tag {
  padding: var(--space-2) var(--space-3);
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: all var(--transition-fast);
}
.tag-input-wrapper .btn-add-tag:hover {
  background: var(--color-accent-light);
}
.tag-list-edit {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  min-height: 28px;
}
.tag-list-edit .tag-edit-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 8px;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}
.tag-list-edit .tag-edit-item .tag-remove {
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}
.tag-list-edit .tag-edit-item .tag-remove:hover { opacity: 1; }
.tag-list-edit .tag-empty {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* ============ AUTHOR INFO (作者信息) ============ */
.author-info-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.author-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: linear-gradient(135deg, var(--color-accent-bg), var(--color-surface-alt));
  border-radius: var(--radius-xl);
}
.author-avatar-large {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.author-header-info h3 {
  font-size: var(--font-size-xl);
  margin-bottom: 2px;
}
.author-header-info .author-bio {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.author-stats-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.author-stat-pill {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 12px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.author-stat-pill .pill-value {
  color: var(--color-accent);
}
.author-achievements-row {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}
.author-ach-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px 10px;
  background: #ecfdf5;
  color: var(--color-success);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}
.author-works-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-2);
}
.author-sort-btns {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface-alt);
  padding: 2px;
  border-radius: var(--radius-md);
}
.author-sort-btn {
  padding: 4px 12px;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.author-sort-btn.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--elevation-1);
}
.author-works-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}
.author-work-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.author-work-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}
.author-work-card h4 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-1);
}
.author-work-card .work-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  line-height: 1.4;
}
.author-work-card .work-stats {
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* ============ WORKS PAGE (我的作品) ============ */
.works-empty {
  text-align: center;
  padding: var(--space-12) var(--space-6);
  color: var(--color-text-tertiary);
}
.works-empty .empty-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
}
.works-empty .empty-text {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2);
}
.works-empty .empty-hint {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-6);
}
.draft-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}
.draft-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--card-shadow-hover);
}
.draft-card .draft-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.draft-card .draft-card-name {
  font-size: var(--font-size-base);
  font-weight: 700;
}
.draft-card .draft-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.draft-card .draft-card-meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
}
.draft-card .draft-card-tags {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
}
.draft-card .draft-card-tags .tag {
  padding: 2px 8px;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 500;
}
.draft-card .draft-card-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ============================================================
   REPOSITORY / PROJECT WORKSPACE
   ============================================================ */

/* Topbar */
.repo-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 56px;
  z-index: 20;
}
.repo-back-btn {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.repo-back-btn:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
}
.repo-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  flex: 1;
}
.repo-actions {
  display: flex;
  gap: var(--space-2);
}

/* Layout */
.repo-layout {
  display: grid;
  grid-template-columns: 220px 1fr 260px;
  gap: 0;
  height: calc(100vh - 180px);
  min-height: 500px;
  border-top: 1px solid var(--color-border);
}

/* Sidebar - File Tree */
.repo-sidebar {
  background: var(--color-surface-alt);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.repo-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 700;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface-alt);
  z-index: 1;
}
.btn-icon {
  width: 26px; height: 26px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-accent);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.btn-icon:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.repo-file-tree {
  padding: var(--space-2);
  flex: 1;
  overflow-y: auto;
}
.repo-file-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.82rem;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}
.repo-file-item:hover {
  background: var(--color-accent-bg);
}
.repo-file-item.active {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-weight: 600;
}
.repo-file-item .file-icon {
  font-size: 1rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}
.repo-file-item .file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.repo-file-item .file-del {
  opacity: 0;
  width: 18px; height: 18px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-error);
  color: #fff;
  font-size: 10px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-fast);
}
.repo-file-item:hover .file-del { opacity: 1; }

/* Editor */
.repo-editor {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  overflow: hidden;
}
.repo-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}
.repo-editor-filename {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
}
.repo-editor-lang {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  font-weight: 600;
}
.repo-editor-body {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}
.repo-editor-empty {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  gap: var(--space-2);
}
.repo-editor-linenos {
  width: 48px;
  background: var(--color-surface-alt);
  border-right: 1px solid var(--color-border);
  overflow: hidden;
  text-align: right;
  padding: 12px 8px;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-tertiary);
  user-select: none;
  flex-shrink: 0;
  display: none;
}
.repo-editor-textarea {
  flex: 1;
  border: none;
  outline: none;
  resize: none;
  padding: 12px 16px;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-surface);
  tab-size: 2;
  white-space: pre;
  overflow-wrap: normal;
  overflow: auto;
}
.repo-editor-textarea::selection {
  background: var(--color-accent-bg);
}
.repo-editor-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-alt);
}
.repo-editor-status {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* Right Panel - Versions + Share */
.repo-panel {
  background: var(--color-surface-alt);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.repo-panel-section {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}
.repo-panel-header {
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 700;
  border-bottom: 1px solid var(--color-border);
}
.repo-version-list {
  max-height: 200px;
  overflow-y: auto;
}
.repo-version-item {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-light);
  font-size: 0.78rem;
}
.repo-version-item:last-child {
  border-bottom: none;
}
.repo-version-item .v-ver {
  font-weight: 700;
  color: var(--color-accent);
}
.repo-version-item .v-date {
  color: var(--color-text-tertiary);
  margin-left: var(--space-2);
}
.repo-version-item .v-desc {
  color: var(--color-text-secondary);
  margin-top: 2px;
}
.repo-share-box {
  padding: var(--space-3);
}
.repo-qr-container {
  text-align: center;
  margin-bottom: var(--space-3);
}
.repo-qr-container canvas {
  border-radius: var(--radius-md);
  border: 4px solid #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
.repo-share-url {
  width: 100%;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  background: var(--color-surface-alt);
  font-family: monospace;
  box-sizing: border-box;
}

/* Bottom Action Bar */
.repo-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  position: sticky;
  bottom: 0;
  z-index: 20;
}
.repo-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.repo-bc-sep { color: var(--color-text-tertiary); }
.repo-bc-item { font-weight: 500; }
.repo-bottom-actions {
  display: flex;
  gap: var(--space-2);
}

/* Commit Modal */
.commit-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.commit-modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  width: 480px;
  max-width: 90vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.commit-modal h3 {
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}
.commit-modal label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
  color: var(--color-text-secondary);
}
.commit-modal input,
.commit-modal textarea {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  background: var(--color-surface);
  color: var(--color-text);
  box-sizing: border-box;
  margin-bottom: var(--space-3);
}
.commit-modal textarea {
  resize: vertical;
  min-height: 80px;
  font-family: inherit;
}
.commit-modal .commit-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* Responsive */
@media (max-width: 900px) {
  .repo-layout {
    grid-template-columns: 180px 1fr;
  }
  .repo-panel { display: none; }
}
@media (max-width: 600px) {
  .repo-layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .repo-sidebar { border-right: none; border-bottom: 1px solid var(--color-border); max-height: 120px; }
  .repo-panel { display: none; }
}

/* Workspace tab enhanced */
.workspace-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.workspace-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}
.workspace-card .ws-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.workspace-card .ws-icon {
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-bg);
  border-radius: var(--radius-md);
}
.workspace-card .ws-name {
  font-weight: 700;
  font-size: var(--font-size-base);
}
.workspace-card .ws-meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
}

/* ============================================================
   PROJECT CONTEXT PANEL
   ============================================================ */
.repo-context-content {
  padding: var(--space-3);
  font-size: 0.73rem;
  max-height: 280px;
  overflow-y: auto;
}
.context-summary {
  padding: var(--space-2) var(--space-3);
  background: var(--color-accent-bg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
  line-height: 1.6;
  color: var(--color-accent);
  font-weight: 500;
}
.context-files-title,
.context-modules-title,
.context-deps-title {
  font-weight: 700;
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  margin: var(--space-2) 0 var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.context-files {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.context-file-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.73rem;
}
.context-file-item:hover {
  background: var(--color-surface-alt);
}
.context-file-role {
  font-size: 0.65rem;
  color: var(--color-text-tertiary);
  font-style: italic;
}
.context-modules {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.context-module-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 8px;
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
  font-size: 0.73rem;
}
.context-module-name {
  font-weight: 600;
  color: var(--color-text);
}
.context-module-file {
  font-size: 0.65rem;
  color: var(--color-text-tertiary);
  font-family: monospace;
}
.context-deps {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.context-dep-item {
  padding: 2px 8px;
  font-size: 0.7rem;
  font-family: monospace;
  color: var(--color-text-secondary);
}
.context-dep-more {
  font-size: 0.65rem;
  color: var(--color-text-tertiary);
  text-align: center;
  padding: 4px;
}

/* ============================================================
   VERSION ACTIONS
   ============================================================ */
.v-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
  margin-left: var(--space-2);
}
.v-action-btn {
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 0.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
  transition: all 0.15s ease;
}
.v-action-btn:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.v-changes {
  font-size: 0.68rem;
  color: var(--color-text-tertiary);
  margin-top: 2px;
  line-height: 1.3;
}

/* ============================================================
   DIFF MODAL
   ============================================================ */
.diff-modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  width: 760px;
  max-width: 95vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.diff-modal-header {
  padding: var(--space-5) var(--space-5) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
.diff-modal-header h3 {
  margin: 0 0 var(--space-1);
  font-size: var(--font-size-xl);
  color: var(--color-accent);
}
.diff-stats {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-5);
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}
.diff-stat {
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--color-surface);
}
.diff-stat-add {
  color: #16a34a;
  background: #f0fdf4;
}
.diff-stat-del {
  color: #dc2626;
  background: #fef2f2;
}
.diff-content {
  flex: 1;
  overflow-y: auto;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 12px;
  line-height: 1.6;
  max-height: 420px;
}
.diff-line {
  display: flex;
  padding: 0 8px;
  min-height: 20px;
}
.diff-line-same {
  color: var(--color-text-secondary);
}
.diff-line-add {
  background: #dcfce7;
  color: #166534;
}
.diff-line-remove {
  background: #fee2e2;
  color: #991b1b;
}
.diff-ln {
  display: inline-block;
  width: 42px;
  min-width: 42px;
  text-align: right;
  padding-right: 10px;
  color: var(--color-text-tertiary);
  user-select: none;
  font-size: 10px;
  line-height: 1.6;
}
.diff-code {
  white-space: pre;
  overflow-x: auto;
}
.diff-modal-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
}

/* Dark theme overrides for diff */
[data-theme="dark"] .diff-line-add {
  background: #052e16;
  color: #4ade80;
}
[data-theme="dark"] .diff-line-remove {
  background: #450a0a;
  color: #f87171;
}
[data-theme="dark"] .diff-stat-add {
  background: #052e16;
  color: #4ade80;
}
[data-theme="dark"] .diff-stat-del {
  background: #450a0a;
  color: #f87171;
}

/* ============================================================
   TOOL UPLOAD: 社区工具上传与发布
   ============================================================ */

.upload-section {
  max-width: 720px;
}

/* --- Step Indicator --- */
.upload-step-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-6);
  padding: var(--space-4) var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  flex-wrap: wrap;
}

.upload-step {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  opacity: 0.4;
  transition: opacity 0.3s ease;
}

.upload-step.active {
  opacity: 1;
}

.upload-step.done {
  opacity: 0.7;
}

.upload-step-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 700;
  background: var(--color-surface-alt);
  color: var(--color-text-secondary);
  transition: all 0.3s ease;
}

.upload-step.active .upload-step-icon {
  background: var(--color-accent);
  color: #fff;
  box-shadow: 0 0 0 4px var(--color-accent-bg);
}

.upload-step.done .upload-step-icon {
  background: var(--color-success);
  color: #fff;
}

.upload-step-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

.upload-step-line {
  width: 32px;
  height: 2px;
  background: var(--color-border);
  margin: 0 var(--space-2);
  border-radius: 1px;
}

/* --- Mode Toggle --- */
.upload-mode-toggle {
  display: inline-flex;
  background: var(--color-surface-alt);
  border-radius: 10px;
  padding: 3px;
  gap: 0;
}

.upload-mode-btn {
  padding: var(--space-2) var(--space-4);
  border: none;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.upload-mode-btn.active {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.upload-mode-btn:hover:not(.active) {
  color: var(--color-text);
}

/* --- Drop Zone --- */
.upload-drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: 16px;
  padding: var(--space-8) var(--space-6);
  text-align: center;
  transition: all 0.25s ease;
  cursor: pointer;
}

.upload-drop-zone:hover,
.upload-drop-zone.drag-over {
  border-color: var(--color-accent);
  background: var(--color-accent-bg);
}

.upload-drop-zone.drag-over {
  transform: scale(1.01);
}

.upload-drop-icon {
  font-size: 3rem;
  margin-bottom: var(--space-3);
  line-height: 1;
}

.upload-drop-text {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.upload-drop-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-3);
}

.upload-drop-formats {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-3);
}

/* --- URL Zone --- */
.upload-url-zone {
  padding: var(--space-4);
}

.upload-url-input {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-fast);
}

.upload-url-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-bg);
}

/* --- Uploaded File Info --- */
.upload-file-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-alt);
  border-radius: 12px;
  margin-top: var(--space-4);
  border: 1px solid var(--color-border);
}

.upload-file-icon {
  font-size: 1.5rem;
}

.upload-file-details {
  flex: 1;
  min-width: 0;
}

.upload-file-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-file-size {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* --- Source Info Badge --- */
.upload-source-info {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-alt);
  border-radius: 8px;
  margin-bottom: var(--space-3);
}

.upload-source-badge {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-bg);
  padding: 2px 8px;
  border-radius: 6px;
}

/* --- Preview Container --- */
.upload-preview-container {
  margin-top: var(--space-4);
}

/* --- Iframe Container (reused for preview) --- */
.tool-iframe-container {
  position: relative;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
}

.tool-iframe-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.tool-iframe-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tool-iframe {
  display: block;
  width: 100%;
  height: 60vh;
  min-height: 400px;
  border: none;
  background: #fff;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .upload-step-label {
    display: none;
  }

  .upload-step-icon {
    width: 28px;
    height: 28px;
  }

  .upload-step-line {
    width: 16px;
  }

  .upload-drop-zone {
    padding: var(--space-6) var(--space-4);
  }

  .upload-mode-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-xs);
  }

  .tool-iframe {
    height: 45vh;
    min-height: 300px;
  }
}

/* --- Dark Theme --- */
[data-theme="dark"] .upload-drop-zone {
  border-color: var(--color-border);
}

[data-theme="dark"] .upload-drop-zone:hover,
[data-theme="dark"] .upload-drop-zone.drag-over {
  background: rgba(99, 102, 241, 0.08);
}

[data-theme="dark"] .upload-mode-toggle {
  background: var(--color-surface-alt);
}

[data-theme="dark"] .upload-mode-btn.active {
  background: var(--color-surface);
  color: var(--color-accent-light);
}

[data-theme="dark"] .upload-file-info {
  background: var(--color-surface-alt);
}

[data-theme="dark"] .tool-iframe {
  background: #1a1a2e;
}

[data-theme="dark"] .tool-iframe-toolbar {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .upload-source-info {
  background: var(--color-surface-alt);
}

/* ============================================================
   WORKS MANAGEMENT (作品管理界面)
   ============================================================ */

/* --- Toolbar --- */
.works-manage-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.works-manage-filters {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.works-manage-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  flex: 1;
  justify-content: flex-end;
}

/* --- Search --- */
.works-manage-search {
  position: relative;
  display: flex;
  align-items: center;
}

.works-manage-search .search-icon {
  position: absolute;
  left: 10px;
  font-size: 0.9rem;
  pointer-events: none;
}

.works-manage-search .search-input {
  padding: 6px 12px 6px 32px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: var(--font-size-sm);
  background: var(--color-bg);
  color: var(--color-text);
  width: 200px;
  transition: border-color 0.2s, width 0.2s;
  outline: none;
}

.works-manage-search .search-input:focus {
  border-color: var(--color-accent);
  width: 260px;
}

/* --- Batch Action Bar --- */
.works-manage-batch-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 12px;
  background: var(--color-accent);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid var(--color-accent-light);
  border-radius: 8px;
  animation: fadeSlideIn 0.25s ease;
}

.batch-count {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-accent);
  white-space: nowrap;
}

/* --- Card Grid --- */
.works-manage-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* --- Works Card --- */
.works-card {
  display: flex;
  align-items: stretch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  position: relative;
}

.works-card:hover {
  border-color: var(--color-accent-light);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.works-card.selected {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.works-card.hidden-card {
  opacity: 0.75;
}

.works-card.hidden-card .works-card-body {
  filter: grayscale(30%);
}

/* --- Checkbox area --- */
.works-card-check {
  display: flex;
  align-items: center;
  padding: 0 12px;
  cursor: pointer;
  flex-shrink: 0;
}

.works-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  background: var(--color-bg);
  transition: all 0.2s;
}

.works-checkbox.checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.works-card:hover .works-checkbox:not(.checked) {
  border-color: var(--color-accent-light);
}

/* --- Card Body --- */
.works-card-body {
  flex: 1;
  padding: var(--space-4);
  cursor: pointer;
  min-width: 0;
}

.works-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.works-card-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.works-card-title h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
  line-height: 1.3;
  display: flex;
  align-items: center;
  gap: 4px;
}

.works-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.works-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.works-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.works-card-tags {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.works-card-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.status-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
}

.status-published {
  background: rgba(16, 185, 129, 0.12);
  color: #10b981;
}

.status-hidden {
  background: rgba(245, 158, 11, 0.12);
  color: #f59e0b;
}

[data-theme="dark"] .status-published {
  background: rgba(16, 185, 129, 0.18);
}

[data-theme="dark"] .status-hidden {
  background: rgba(245, 158, 11, 0.18);
}

.works-card-stats {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}

/* --- Card Actions --- */
.works-card-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  border-left: 1px solid var(--color-border);
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-surface-alt);
  min-width: 100px;
}

.works-card-actions .btn {
  width: 100%;
  white-space: nowrap;
}

/* --- Pagination --- */
.works-pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding: var(--space-3) 0;
}

.pagination-info {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.pagination-btns {
  display: flex;
  align-items: center;
  gap: 4px;
}

.pagination-btn {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 36px;
  text-align: center;
}

.pagination-btn:hover:not(:disabled):not(.active) {
  border-color: var(--color-accent-light);
  background: var(--color-surface-alt);
}

.pagination-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* --- Confirm Modal --- */
.confirm-modal-icon {
  font-size: 3rem;
  text-align: center;
  margin-bottom: var(--space-3);
}

.confirm-modal-message {
  font-size: var(--font-size-base);
  line-height: 1.7;
  text-align: center;
  margin-bottom: var(--space-5);
  color: var(--color-text);
}

.btn-danger {
  background: var(--color-error);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-danger:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* --- Empty/No Results --- */
.works-empty {
  text-align: center;
  padding: var(--space-10) var(--space-4);
}

/* --- Dark Theme Overrides --- */
[data-theme="dark"] .works-manage-toolbar {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-theme="dark"] .works-card:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

[data-theme="dark"] .works-card.selected {
  box-shadow: 0 0 0 1px var(--color-accent-light);
}

[data-theme="dark"] .works-checkbox {
  background: var(--color-surface-alt);
}

[data-theme="dark"] .works-manage-batch-actions {
  background: rgba(129, 140, 248, 0.12);
}

[data-theme="dark"] .pagination-btn:hover:not(:disabled):not(.active) {
  background: rgba(255,255,255,0.05);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .works-manage-toolbar {
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3);
  }

  .works-manage-actions {
    justify-content: flex-start;
  }

  .works-manage-search .search-input {
    width: 140px;
  }

  .works-manage-search .search-input:focus {
    width: 180px;
  }

  .works-card {
    flex-direction: column;
  }

  .works-card-check {
    padding: 8px 12px 0;
  }

  .works-card-actions {
    flex-direction: row;
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding: var(--space-2) var(--space-3);
  }

  .works-card-actions .btn {
    width: auto;
    font-size: var(--font-size-xs);
    padding: 4px 8px;
  }

  .works-pagination {
    justify-content: center;
  }

  .pagination-info {
    width: 100%;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .works-manage-filters {
    width: 100%;
  }

  .works-manage-filters .filter-chip {
    font-size: 0.7rem;
    padding: 4px 10px;
  }

  .works-manage-search .search-input {
    width: 120px;
  }

  .works-card-header {
    flex-wrap: wrap;
  }

  .works-card-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}