html { color-scheme: light dark; }

:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #666;
  --card: #f6f6f6;
  --border: #e6e6e6;
  --primary: #111;
  --ins: #0b8b0b;
  --del: #b00020;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-hover: rgba(0, 0, 0, 0.15);
  
  /* 扩展颜色变量 */
  --success: #28a745;
  --error: #dc3545;
  --info: #17a2b8;
  --warning: #ffbf00;
  --star: #ffc107;
  --text-on-primary: white;
  --text-on-success: white;
  --text-on-error: white;
  --text-on-info: white;
  --text-on-warning: black;
  --print-border: #ccc;
  
  /* Typography Scale */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  
  /* Spacing Scale */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;
  --spacing-4xl: 40px;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
}
[data-theme="light"]:root {
  /* 手动浅色覆盖，确保不受系统影响 */
  --bg: #ffffff;
  --fg: #111111;
  --muted: #666;
  --card: #f6f6f6;
  --border: #e6e6e6;
  --primary: #111;
  --ins: #0b8b0b;
  --del: #b00020;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-hover: rgba(0, 0, 0, 0.15);
  --success: #28a745;
  --error: #dc3545;
  --info: #17a2b8;
  --warning: #ffbf00;
  --star: #ffc107;
  --text-on-primary: white;
  --text-on-success: white;
  --text-on-error: white;
  --text-on-info: white;
  --text-on-warning: black;
  --print-border: #ccc;
}
@media (prefers-color-scheme: dark) {
  :root {
    /* 自动跟随系统的暗色变量 */
    --bg: #0e0e0f;
    --fg: #e6e6e6;
    --muted: #9aa0a6;
    --card: #17181a;
    --border: #2a2b2e;
    --primary: #fff;
    --ins: #3bd13b;
    --del: #ff5c7a;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.5);
    --success: #34a853;
    --error: #ea4335;
    --info: #4285f4;
    --warning: #fbbc04;
    --star: #fdd663;
    --text-on-primary: black;
    --text-on-success: white;
    --text-on-error: white;
    --text-on-info: white;
    --text-on-warning: black;
    --print-border: #666;
  }
}
[data-theme="dark"]:root {
  --bg: #0e0e0f;
  --fg: #e6e6e6;
  --muted: #9aa0a6;
  --card: #17181a;
  --border: #2a2b2e;
  --primary: #fff;
  --ins: #3bd13b;
  --del: #ff5c7a;
  --shadow: rgba(0, 0, 0, 0.3);
  --shadow-hover: rgba(0, 0, 0, 0.5);
  
  /* 扩展颜色变量 - 黑夜模式适配 */
  --success: #34a853;
  --error: #ea4335;
  --info: #4285f4;
  --warning: #fbbc04;
  --star: #fdd663;
  --text-on-primary: black;
  --text-on-success: white;
  --text-on-error: white;
  --text-on-info: white;
  --text-on-warning: black;
  --print-border: #666;
}
* { box-sizing: border-box; }
html, body { 
  margin: 0; 
  padding: 0; 
  background: var(--bg); 
  color: var(--fg); 
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Ubuntu', 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  font-size: var(--font-size-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { 
  color: var(--primary); 
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* Smooth scrolling and transitions */
html { scroll-behavior: smooth; }
body { 
  transition: background-color 0.3s ease, color 0.3s ease;
  font-feature-settings: "kern" 1;
  text-rendering: optimizeLegibility;
}

/* Enhanced topbar */
.topbar { 
  position: sticky; 
  top: 0; 
  z-index: 100; 
  background: var(--bg); 
  border-bottom: 1px solid var(--border); 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  padding: var(--spacing-md) var(--spacing-xl); 
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  box-shadow: 0 2px 10px var(--shadow);
  min-height: 60px;
}
.brand a { 
  font-weight: 700; 
  font-size: var(--font-size-xl);
  transition: transform 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  min-height: 44px;
}
.brand a:hover { 
  transform: translateX(2px);
  text-decoration: none;
  background: color-mix(in srgb, var(--primary) 5%, transparent);
}
.brand a::before { 
  display: none; 
}
.nav { 
  display: flex; 
  gap: var(--spacing-lg); 
  align-items: center;
}
.container { 
  max-width: 1200px;
  padding: var(--spacing-xl);
  margin: 0 auto;
  min-height: calc(100vh - 70px);
}

/* Enhanced buttons with ripple effect and touch-friendly sizing */
.btn { 
  border: 1px solid var(--border); 
  background: transparent; 
  color: var(--fg); 
  padding: var(--spacing-md) var(--spacing-xl); 
  border-radius: var(--radius-lg); 
  cursor: pointer; 
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  font-weight: 500;
  font-size: var(--font-size-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  border: none;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
}
.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}
.btn:hover::before {
  width: 300px;
  height: 300px;
}
.btn:hover { 
  background: var(--card); 
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow);
  text-decoration: none;
  color: var(--fg);
}
.btn:active { 
  transform: scale(0.96); 
  transition: transform 0.1s ease;
}
.btn.primary { 
  background: var(--fg); 
  color: var(--bg); 
  border-color: var(--fg);
}
.btn.primary:hover {
  background: color-mix(in srgb, var(--fg) 90%, var(--bg));
  color: var(--bg);
}
.btn.ghost { 
  background: transparent; 
  border: 1px solid var(--border);
}
.btn.ghost:hover {
  border-color: var(--primary);
  background: color-mix(in srgb, var(--primary) 5%, transparent);
}
.icon-btn { 
  background: transparent; 
  border: 1px solid var(--border); 
  cursor: pointer; 
  font-size: var(--font-size-lg);
  transition: all 0.2s ease;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  color: var(--fg);
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover {
  background: color-mix(in srgb, var(--primary) 5%, transparent);
  border-color: var(--primary);
  transform: scale(1.05);
}
.inline { display: inline; }

/* Enhanced flash notifications */
.flash-wrap { 
  position: fixed; 
  right: var(--spacing-xl); 
  bottom: var(--spacing-xl); 
  display: grid; 
  gap: var(--spacing-md); 
  z-index: 1000;
}
.flash { 
  padding: var(--spacing-md) var(--spacing-lg); 
  border-radius: var(--radius-xl); 
  background: var(--card); 
  border: 1px solid var(--border); 
  box-shadow: 0 8px 32px var(--shadow);
  animation: slideInRight 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
  overflow: hidden;
  font-size: var(--font-size-sm);
  max-width: 400px;
}
.flash::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
}
.flash.success::before { background: var(--success); }
.flash.error::before { background: var(--error); }
.flash.info::before { background: var(--info); }
.flash.success { border-color: color-mix(in srgb, var(--success) 30%, transparent); }
.flash.error { border-color: color-mix(in srgb, var(--error) 30%, transparent); }
.flash.info { border-color: color-mix(in srgb, var(--info) 30%, transparent); }

/* Enhanced animations */
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Enhanced toolbar */
.toolbar { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  gap: var(--spacing-xl); 
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}
.search-form { 
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  flex: 1;
  min-width: 320px;
}

.search-controls {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.sort-select {
  min-width: 140px;
}

.search-btn {
  white-space: nowrap;
}
.search-input-wrapper {
  position: relative;
  flex: 1;
}
.search-input-wrapper i {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  z-index: 1;
  font-size: var(--font-size-sm);
}
input[type="text"], input[type="number"], input[type="password"], select, textarea { 
  width: 100%; 
  padding: var(--spacing-md) var(--spacing-lg); 
  border-radius: var(--radius-lg); 
  border: 1px solid var(--border); 
  background: transparent; 
  color: var(--fg);
  transition: all 0.3s ease;
  font-family: inherit;
  font-size: var(--font-size-base);
  min-height: 48px;
  display: flex;
  align-items: center;
}
input[type="text"]:focus, input[type="number"]:focus, input[type="password"]:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 10%, transparent);
}
.search-input-wrapper input {
  padding-left: calc(var(--spacing-lg) + 32px);
  padding-right: var(--spacing-lg);
}
textarea { 
  resize: vertical; 
  min-height: 120px;
  line-height: 1.5;
}

/* Enhanced list and cards */
.list { 
  display: grid; 
  gap: var(--spacing-xl);
}
.card { 
  background: var(--card); 
  border: 1px solid var(--border); 
  border-radius: var(--radius-xl); 
  padding: var(--spacing-xl);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, color-mix(in srgb, var(--primary) 3%, transparent) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.card:hover::before {
  opacity: 1;
}
.card:hover { 
  transform: translateY(-4px); 
  box-shadow: 0 12px 40px var(--shadow-hover);
  border-color: color-mix(in srgb, var(--primary) 20%, var(--border));
}

/* Accent color ring for cards (optional) */
.card.color-ring {
  /* subtle outer ring similar to border */
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 70%, transparent);
}
.card.color-ring:hover {
  /* preserve hover elevation while keeping the ring */
  box-shadow: 0 0 0 2px var(--accent), 0 12px 40px var(--shadow-hover);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}
.card-hd { 
  display: flex; 
  align-items: center; 
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}
.card .title { 
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--primary);
  flex: 1;
  margin-right: var(--spacing-md);
}
.card .title:hover {
  text-decoration: underline;
}
.meta { 
  color: var(--muted); 
  display: flex; 
  gap: var(--spacing-lg); 
  font-size: var(--font-size-xs); 
  margin-top: var(--spacing-md); 
  flex-wrap: wrap;
}
.meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.tags { 
  display: flex; 
  gap: var(--spacing-sm); 
  margin-top: var(--spacing-md); 
  flex-wrap: wrap;
}
.tag { 
  background: transparent; 
  border: 1px dashed var(--border); 
  padding: var(--spacing-xs) var(--spacing-sm); 
  border-radius: 20px; 
  font-size: var(--font-size-xs); 
  color: var(--muted);
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 2px;
}
.tag:hover {
  border-style: solid;
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  color: var(--primary);
}
.notes { 
  margin: var(--spacing-md) 0 0;
  color: var(--fg);
  line-height: 1.6;
  font-size: var(--font-size-sm);
}
.empty { 
  color: var(--muted); 
  text-align: center; 
  padding: var(--spacing-4xl); 
  border: 2px dashed var(--border); 
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--card) 50%, transparent);
  font-size: var(--font-size-lg);
}
.empty p {
  margin: 0;
  font-size: var(--font-size-base);
}

/* Enhanced detail view */
.detail .fields-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
  gap: var(--spacing-xl);
}
.detail label { 
  display: grid; 
  gap: var(--spacing-sm);
  font-weight: 500;
  color: var(--fg);
  font-size: var(--font-size-sm);
}
.detail .prompt-form {
  max-width: 900px;
  margin: 0 auto;
}
.fold { 
  border: 1px solid var(--border); 
  border-radius: var(--radius-xl); 
  margin: var(--spacing-xl) 0; 
  background: transparent;
  transition: all 0.3s ease;
}
.fold:hover {
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
}
.fold > summary { 
  list-style: none; 
  cursor: pointer; 
  padding: var(--spacing-lg) var(--spacing-xl); 
  font-weight: 600; 
  position: relative;
  transition: background-color 0.2s ease;
  font-size: var(--font-size-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
.fold > summary:hover {
  background: color-mix(in srgb, var(--card) 50%, transparent);
}
.fold > summary::-webkit-details-marker { display: none; }
.fold > summary::before { 
  content: '▸'; 
  position: absolute; 
  left: var(--spacing-lg); 
  transform: translateX(-100%); 
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 1.2rem;
}
.fold[open] > summary::before { 
  transform: translateX(-100%) rotate(90deg); 
}
.fold .fold-body { 
  padding: 0 var(--spacing-xl) var(--spacing-xl); 
  display: grid; 
  gap: var(--spacing-lg);
}
.actions { 
  display: flex; 
  gap: var(--spacing-md); 
  align-items: center; 
  margin-top: var(--spacing-xl); 
  flex-wrap: wrap;
}
.checkbox { 
  display: inline-flex; 
  gap: var(--spacing-sm); 
  align-items: center;
  cursor: pointer;
  font-size: var(--font-size-sm);
}

/* Enhanced versions */
.versions { 
  margin-top: var(--spacing-2xl);
}
.version-list { 
  display: grid; 
  gap: var(--spacing-md);
}
.version-item { 
  background: var(--card); 
  border: 1px solid var(--border); 
  border-radius: var(--radius-lg); 
  padding: var(--spacing-lg) var(--spacing-xl); 
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  transition: all 0.2s ease;
}
.version-item:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 16px var(--shadow);
}
.version-item.current { 
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  background: color-mix(in srgb, var(--primary) 5%, var(--card));
}
.version-item .vline { 
  display: grid; 
  gap: var(--spacing-xs);
}
.version-item .vver { 
  font-weight: 600;
  color: var(--primary);
  font-size: var(--font-size-sm);
}
.version-item .vtime { 
  color: var(--muted); 
  font-size: var(--font-size-xs);
}

/* Enhanced settings */
.settings-form { 
  display: grid; 
  gap: var(--spacing-xl);
  max-width: 600px;
  margin: 0 auto;
}
.settings-form .help { 
  color: var(--muted);
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-xs);
}
.settings-form .upload input[type=file] { 
  display: block; 
  margin-top: var(--spacing-sm);
}

/* Enhanced diff view */
.diff-toolbar { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}
.diff-select { 
  display: flex; 
  gap: var(--spacing-md); 
  align-items: center; 
  flex-wrap: wrap;
}
.diff-view h3 { 
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  color: var(--primary);
  font-size: var(--font-size-lg);
}
.diff-container { 
  overflow: auto; 
  border: 1px solid var(--border); 
  border-radius: var(--radius-xl);
  max-height: 600px;
  box-shadow: inset 0 2px 8px var(--shadow);
}
.diff-table { 
  border-collapse: collapse; 
  width: 100%;
  font-family: 'Consolas', 'Monaco', 'SF Mono', monospace;
  font-size: var(--font-size-xs);
  line-height: 1.5;
}
.diff-table th, .diff-table td { 
  border-bottom: 1px solid var(--border); 
  padding: var(--spacing-sm) var(--spacing-md); 
  vertical-align: top;
  transition: background-color 0.2s ease;
}
.diff-table th { 
  position: sticky; 
  top: 0; 
  background: var(--bg); 
  z-index: 1;
  font-weight: 600;
  color: var(--primary);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.diff-table tr:hover td {
  background: color-mix(in srgb, var(--card) 30%, transparent);
}
.cell-left, .cell-right { 
  width: 50%; 
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}
.diff-ins { 
  background: color-mix(in srgb, var(--ins) 18%, transparent); 
  color: inherit;
  animation: highlightIn 0.5s ease-out;
}
.diff-del { 
  background: color-mix(in srgb, var(--del) 18%, transparent); 
  color: inherit; 
  text-decoration: line-through;
  animation: highlightIn 0.5s ease-out;
}
.line-diff table { 
  border-collapse: collapse; 
  font-size: var(--font-size-xs);
  font-family: 'Consolas', 'Monaco', 'SF Mono', monospace;
  line-height: 1.4;
}
.line-diff td { 
  border: 1px solid var(--border); 
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: background-color 0.2s ease;
}
.line-diff tr:hover td {
  background: color-mix(in srgb, var(--card) 20%, transparent);
}
.line-diff .diff_add { 
  background: color-mix(in srgb, var(--ins) 14%, transparent);
  animation: highlightIn 0.5s ease-out;
}
.line-diff .diff_chg { 
  background: color-mix(in srgb, var(--warning) 20%, transparent);
  animation: highlightIn 0.5s ease-out;
}
.line-diff .diff_sub { 
  background: color-mix(in srgb, var(--del) 14%, transparent);
  animation: highlightIn 0.5s ease-out;
}

@keyframes highlightIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Loading spinner */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
}

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

/* Responsive design */
@media (max-width: 768px) {
  .container { 
    padding: var(--spacing-lg); 
  }
  .topbar { 
    padding: var(--spacing-md) var(--spacing-lg); 
    min-height: 56px;
  }
  .brand a { 
    font-size: var(--font-size-lg);
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  .nav { 
    gap: var(--spacing-md); 
  }
  .toolbar { 
    flex-direction: column; 
    align-items: stretch; 
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
  }
  .search-form { 
    min-width: auto; 
    flex-direction: column;
  }
  .search-input-wrapper {
    width: 100%;
  }
  .detail .fields-grid { 
    grid-template-columns: 1fr; 
    gap: var(--spacing-lg);
  }
  .meta { 
    gap: var(--spacing-md); 
    flex-wrap: wrap;
  }
  .actions { 
    gap: var(--spacing-md); 
    flex-wrap: wrap;
  }
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
  }
  .list {
    gap: var(--spacing-xl);
  }
  .card {
    padding: var(--spacing-xl);
  }
  .fold {
    margin: var(--spacing-lg) 0;
  }
  .fold > summary {
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
  }
  .fold .fold-body {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
  }
}

@media (max-width: 480px) {
  .container {
    padding: var(--spacing-md);
  }
  .topbar {
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 52px;
  }
  .brand a {
    font-size: var(--font-size-base);
    padding: var(--spacing-xs);
    gap: var(--spacing-xs);
  }
  .nav {
    gap: var(--spacing-sm);
  }
  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-xs);
    min-height: 40px;
    min-width: 40px;
  }
  .icon-btn {
    min-height: 36px;
    min-width: 36px;
    padding: var(--spacing-xs);
  }
  .card {
    padding: var(--spacing-lg);
  }
  .card .title {
    font-size: var(--font-size-base);
  }
  .meta {
    font-size: 11px;
    gap: var(--spacing-sm);
  }
  .tag {
    font-size: 10px;
    padding: 3px 8px;
    min-height: 22px;
  }
  .notes {
    font-size: var(--font-size-xs);
  }
  input[type="text"], input[type="number"], input[type="password"], select, textarea {
    min-height: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  .search-input-wrapper input {
    padding-left: calc(var(--spacing-md) + 28px);
  }
  .search-input-wrapper i {
    left: var(--spacing-sm);
  }
}

/* Accessibility and performance optimizations for mobile */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .btn::before {
    display: none;
  }
  
  .icon-btn:hover {
    transform: none;
  }
  
  .card:hover {
    transform: none;
  }
}

/* Mobile performance optimizations */
@media (max-width: 768px) {
  /* Reduce expensive effects on mobile */
  .topbar {
    backdrop-filter: none;
    background: var(--bg);
  }
  
  .btn::before {
    display: none;
  }
  
  .btn:hover::before {
    display: none;
  }
  
  .icon-btn:hover {
    transform: scale(1.02);
  }
  
  .card::before {
    display: none;
  }
  
  .card:hover {
    transform: translateY(-2px);
  }
  
  /* Simplify animations for better performance */
  .flash {
    animation: slideInRightSimple 0.3s ease-out;
  }
}

@keyframes slideInRightSimple {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}



/* Theme toggle animation - mobile optimized */
#themeToggle {
  transition: transform 0.2s ease;
}

@media (min-width: 769px) {
  #themeToggle:hover {
    transform: rotate(180deg);
  }
}

@media (max-width: 768px) {
  #themeToggle:hover {
    transform: scale(1.05);
  }
}

/* Icon spacing */
.btn i, .title i, .meta i, .tag i, .notes i {
  margin-right: var(--spacing-xs);
}

/* Improved accessibility */
.btn:focus, input:focus, select:focus, textarea:focus, .icon-btn:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Improved print styles */
@media print {
  .topbar, .nav, .actions, .flash-wrap {
    display: none !important;
  }
  .container {
    padding: 0;
    max-width: none;
  }
  .card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--print-border);
  }
}