/* ========== GeekHub Tools Portal - Design System ========== */
:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #161b25;
  --bg-card-hover: #1c2333;
  --bg-glass: rgba(22, 27, 37, 0.7);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --text-primary: #e8ecf1;
  --text-secondary: #8892a8;
  --text-muted: #5a6480;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.2);
  --green: #10b981;
  --green-glow: rgba(16, 185, 129, 0.2);
  --purple: #8b5cf6;
  --purple-glow: rgba(139, 92, 246, 0.2);
  --orange: #f59e0b;
  --orange-glow: rgba(245, 158, 11, 0.2);
  --red: #ef4444;
  --radius: 16px;
  --radius-sm: 10px;
  --sidebar-width: 260px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f5f7fa;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f3f8;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --text-primary: #1a1d26;
  --text-secondary: #5a6070;
  --text-muted: #8e95a3;
  --accent: #2563eb;
  --accent-light: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.12);
  --green: #059669;
  --green-glow: rgba(5, 150, 105, 0.12);
  --purple: #7c3aed;
  --purple-glow: rgba(124, 58, 237, 0.12);
  --orange: #d97706;
  --orange-glow: rgba(217, 119, 6, 0.12);
  --red: #dc2626;
}

/* Smooth theme transition */
body, .sidebar, .stat-card, .tool-card, .about-card, .nav-item,
.bg-glow, .tool-iframe-wrapper, .iframe-loading-overlay, .iframe-error-overlay {
  transition: background-color 0.35s ease, border-color 0.35s ease, color 0.35s ease, box-shadow 0.35s ease;
}

/* Light theme adjustments */
[data-theme="light"] .bg-grid {
  background-image:
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
}

[data-theme="light"] .bg-glow {
  opacity: 0.15;
}

[data-theme="light"] .stat-card {
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

[data-theme="light"] .stat-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

[data-theme="light"] .tool-card {
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}

[data-theme="light"] .tool-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

[data-theme="light"] .sidebar-logo-text {
  color: var(--text-primary);
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}

/* ========== Animated BG ========== */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

.bg-glow-1 {
  top: -200px;
  right: -100px;
  background: var(--accent);
  animation: float1 12s ease-in-out infinite;
}

.bg-glow-2 {
  bottom: -200px;
  left: -100px;
  background: var(--purple);
  animation: float2 15s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, 30px) scale(1.05); }
  66% { transform: translate(20px, -20px) scale(0.95); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.1); }
}

/* ========== Layout ========== */
.app-container {
  display: flex;
  height: 100vh;
  position: relative;
  z-index: 1;
}

/* ========== Sidebar ========== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform var(--transition);
  z-index: 10;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.sidebar-logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
}

.sidebar-logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.sidebar-logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 12px;
}

.nav-section {
  margin-bottom: 20px;
}

.nav-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0 12px 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  margin-bottom: 2px;
  position: relative;
}

.nav-item:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--bg-card);
  color: var(--accent-light);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.nav-badge {
  margin-left: auto;
  background: var(--accent-glow);
  color: var(--accent-light);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.theme-toggle {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
  position: relative;
}

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

.theme-icon-light { display: none; }
.theme-icon-dark { display: block; }

[data-theme="light"] .theme-icon-light { display: block; }
[data-theme="light"] .theme-icon-dark { display: none; }

.sidebar-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green-glow);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ========== Main Content ========== */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: 0;
  position: relative;
}

.page {
  display: none;
  padding: 40px 48px;
  max-width: 1400px;
}

.page.active {
  display: block;
}

/* ========== Hero & Stats ========== */
.hero-section {
  margin-bottom: 40px;
}

.hero-title {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 400;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.stat-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.stat-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.stat-icon.blue { background: var(--accent-glow); color: var(--accent-light); }
.stat-icon.green { background: var(--green-glow); color: var(--green); }
.stat-icon.purple { background: var(--purple-glow); color: var(--purple); }
.stat-icon.orange { background: var(--orange-glow); color: var(--orange); }

.stat-value {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.stat-change {
  font-size: 12px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.stat-change.up { color: var(--green); }
.stat-change.down { color: var(--red); }

/* ========== Section Headers ========== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.search-input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--text-primary);
  font-size: 14px;
  width: 260px;
  transition: all var(--transition);
  outline: none;
}

.search-input::placeholder { color: var(--text-muted); }
.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ========== Category Tabs ========== */
.category-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.category-tab {
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.category-tab:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.category-tab.active {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ========== Tool Cards Grid ========== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 18px;
}

.tool-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--purple));
  opacity: 0;
  transition: opacity var(--transition);
}

.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.tool-card:hover::before { opacity: 1; }

.tool-card-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.tool-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.tool-icon.customer { background: var(--accent-glow); }
.tool-icon.analysis { background: var(--purple-glow); }
.tool-icon.marketing { background: var(--green-glow); }
.tool-icon.management { background: var(--orange-glow); }

.tool-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.tool-version {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.tool-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.tool-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.tool-tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 500;
  background: var(--bg-card);
  color: var(--text-secondary);
}

.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.tool-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
}

.tool-status.ready { color: var(--green); }
.tool-status.soon { color: var(--orange); }

.tool-arrow {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition);
}

.tool-card:hover .tool-arrow {
  background: var(--accent);
  color: #fff;
}

/* ========== Tool Detail / Iframe Page ========== */
.tool-detail-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.back-btn {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition);
}

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

.tool-detail-title {
  font-size: 22px;
  font-weight: 700;
}

.tool-detail-badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: var(--green-glow);
  color: var(--green);
}

.tool-iframe-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  height: calc(100vh - 200px);
  min-height: 600px;
}

.tool-iframe-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ========== Empty State ========== */
.empty-state {
  text-align: center;
  padding: 80px 20px;
}

.empty-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 36px;
  border: 1px solid var(--border-color);
}

.empty-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ========== About Page ========== */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.about-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}

.about-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 28px;
}

.about-card-icon.blue { background: var(--accent-glow); }
.about-card-icon.green { background: var(--green-glow); }
.about-card-icon.purple { background: var(--purple-glow); }

.about-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.about-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Tool Detail Page ========== */
.tool-detail-page {
  padding-top: 8px;
}

/* ========== Tool Actions Bar ========== */
.tool-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.tool-action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

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

.tool-action-btn svg {
  width: 14px;
  height: 14px;
}

/* ========== Iframe Skeleton Loader ========== */
.iframe-loading-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: opacity 0.4s ease;
  border-radius: var(--radius);
}

.iframe-loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.skeleton-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

.skeleton-text {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

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

.skeleton-bar {
  width: 200px;
  height: 4px;
  background: var(--border-color);
  border-radius: 2px;
  margin-top: 16px;
  overflow: hidden;
  position: relative;
}

.skeleton-bar::after {
  content: '';
  position: absolute;
  top: 0; left: -60px;
  width: 60px; height: 100%;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  animation: shimmer 1.5s ease-in-out infinite;
}

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

@keyframes shimmer {
  to { left: 100%; }
}

/* ========== Iframe Error State ========== */
.iframe-error-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 3;
  border-radius: var(--radius);
  text-align: center;
  padding: 40px;
}

.iframe-error-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(239,68,68,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 16px;
  border: 1px solid rgba(239,68,68,0.2);
}

.iframe-error-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.iframe-error-desc {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  max-width: 400px;
  line-height: 1.6;
}

.iframe-error-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-retry {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-retry:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.btn-outline {
  padding: 10px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

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

/* ========== Iframe Wrapper ========== */
.tool-iframe-wrapper {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  height: calc(100vh - 200px);
  min-height: 600px;
}

.tool-iframe-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.tool-iframe-wrapper iframe.loaded {
  opacity: 1;
}

/* ========== Keyboard Shortcut Hint ========== */
.search-hint {
  position: absolute;
  right: 48px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.search-hint kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  font-size: 10px;
  color: var(--text-muted);
  font-family: inherit;
  gap: 2px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tools-grid {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .page {
    padding: 24px 20px;
  }
  .tool-actions .tool-action-btn span {
    display: none;
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    transform: translateX(-100%);
    z-index: 10;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 24px;
  }
  .tool-detail-header {
    flex-wrap: wrap;
    gap: 10px;
  }
  .tool-actions {
    width: 100%;
    justify-content: flex-end;
  }
  .tool-iframe-wrapper {
    height: calc(100vh - 260px);
    min-height: 400px;
  }
  .tool-detail-badge {
    display: none;
  }
  .search-hint {
    display: none;
  }
  .section-header {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  .search-input {
    width: 100%;
  }
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ========== Mobile Toggle ========== */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 20;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
}

@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
}

/* ========== Overlay ========== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 5;
}

@media (max-width: 768px) {
  .sidebar-overlay.show { display: block; }
}