/*
 * iOS Design System for 15481055.xyz
 * Native iOS look & feel using SF Pro, proper spacing, shadows, animations
 */

:root {
  /* Colors - Light */
  --bg-primary: #f2f2f7;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e5e5ea;
  --bg-quaternary: #d1d1d6;
  --bg-card: #ffffff;
  --bg-card-elevated: #ffffff;
  --bg-input: #f2f2f7;
  --bg-modal: rgba(0, 0, 0, 0.4);
  --bg-modal-backdrop: rgba(0, 0, 0, 0.4);

  --text-primary: #000000;
  --text-secondary: #3c3c43;
  --text-tertiary: #8e8e93;
  --text-quaternary: #aeaeb2;
  --text-inverse: #ffffff;
  --text-link: #007aff;
  --text-link-pressed: #0056cc;

  --border-primary: #c6c6c8;
  --border-secondary: #e5e5ea;
  --border-focus: #007aff;
  --border-error: #ff3b30;
  --border-success: #34c759;

  --accent-blue: #007aff;
  --accent-green: #34c759;
  --accent-orange: #ff9500;
  --accent-red: #ff3b30;
  --accent-purple: #af52de;
  --accent-pink: #ff2d92;
  --accent-teal: #5ac8fa;
  --accent-indigo: #5856d6;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 1px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.06);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;

  --font-size-xs: 11px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 17px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 28px;
  --font-size-4xl: 34px;

  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.2;
  --line-height-normal: 1.4;
  --line-height-relaxed: 1.6;

  --transition-fast: 120ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  --safe-top: env(safe-area-inset-top, 0);
  --safe-bottom: env(safe-area-inset-bottom, 0);
  --safe-left: env(safe-area-inset-left, 0);
  --safe-right: env(safe-area-inset-right, 0);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-quaternary: #38383a;
    --bg-card: #1c1c1e;
    --bg-card-elevated: #2c2c2e;
    --bg-input: #2c2c2e;
    --bg-modal: rgba(0, 0, 0, 0.6);
    --bg-modal-backdrop: rgba(0, 0, 0, 0.6);

    --text-primary: #ffffff;
    --text-secondary: #ebebf5;
    --text-tertiary: #8e8e93;
    --text-quaternary: #636366;
    --text-inverse: #000000;
    --text-link: #0a84ff;
    --text-link-pressed: #409cff;

    --border-primary: #38383a;
    --border-secondary: #2c2c2e;
    --border-focus: #0a84ff;
    --border-error: #ff453a;
    --border-success: #30d158;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2), 0 1px 1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.4), 0 4px 8px rgba(0, 0, 0, 0.25);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5), 0 8px 16px rgba(0, 0, 0, 0.3);
  }
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; overflow-wrap: anywhere; word-break: break-word; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", system-ui, sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  min-height: 100dvh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--font-size-4xl); font-weight: var(--font-weight-bold); letter-spacing: -0.4px; }
h2 { font-size: var(--font-size-3xl); font-weight: var(--font-weight-bold); letter-spacing: -0.3px; }
h3 { font-size: var(--font-size-2xl); font-weight: var(--font-weight-semibold); letter-spacing: -0.2px; }
h4 { font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); }
h5 { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
h6 { font-size: var(--font-size-base); font-weight: var(--font-weight-semibold); }

p { margin: 0 0 var(--spacing-3); color: var(--text-secondary); line-height: var(--line-height-relaxed); }
p:last-child { margin-bottom: 0; }

a { color: var(--text-link); text-decoration: none; transition: color var(--transition-fast); }
a:active { color: var(--text-link-pressed); }
a:hover { text-decoration: underline; }

small, .text-xs { font-size: var(--font-size-xs); color: var(--text-tertiary); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-quaternary { color: var(--text-quaternary); }
.text-inverse { color: var(--text-inverse); }

/* Layout */
.container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
  .container { max-width: 720px; padding: 0 var(--spacing-6); }
}

@media (min-width: 1024px) {
  .container { max-width: 980px; }
}

/* iOS-style Card */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-secondary);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-elevated {
  background: var(--bg-card-elevated);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-5);
  border-bottom: 1px solid var(--border-secondary);
}

.card-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
.card-subtitle { font-size: var(--font-size-sm); color: var(--text-tertiary); margin-top: var(--spacing-1); }
.card-body { padding: var(--spacing-5); }
.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-3);
  padding: var(--spacing-4) var(--spacing-5);
  border-top: 1px solid var(--border-secondary);
  background: var(--bg-tertiary);
}

/* Buttons - iOS Style */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; pointer-events: none; }
.btn:active:not(:disabled) { transform: scale(0.98); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--bg-primary), 0 0 0 5px var(--border-focus); }

.btn-primary {
  background: var(--accent-blue);
  color: var(--text-inverse);
}
.btn-primary:active:not(:disabled) { background: var(--text-link-pressed); }

@media (prefers-color-scheme: dark) {
  .btn-primary { background: var(--accent-blue); }
  .btn-primary:active:not(:disabled) { background: #0056cc; }
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}
.btn-secondary:active:not(:disabled) { background: var(--bg-quaternary); }

.btn-success {
  background: var(--accent-green);
  color: var(--text-inverse);
}
.btn-success:active:not(:disabled) { background: #28a745; }

.btn-destructive {
  background: var(--accent-red);
  color: var(--text-inverse);
}
.btn-destructive:active:not(:disabled) { background: #d70015; }

.btn-ghost {
  background: transparent;
  color: var(--text-link);
}
.btn-ghost:active:not(:disabled) { background: var(--bg-input); border-radius: var(--radius-sm); }

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-primary);
}
.btn-outline:active:not(:disabled) { background: var(--bg-input); }

.btn-lg { padding: var(--spacing-3) var(--spacing-6); font-size: var(--font-size-lg); }
.btn-sm { padding: var(--spacing-1) var(--spacing-3); font-size: var(--font-size-sm); }
.btn-xs { padding: 4px 10px; font-size: var(--font-size-xs); }

.btn-block { width: 100%; }
.btn-icon { padding: var(--spacing-2); }
.btn-icon.btn-lg { padding: var(--spacing-3); }

/* Inputs - iOS Style */
.form-group { margin-bottom: var(--spacing-4); }
.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2);
}

.input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  outline: none;
  transition: all var(--transition-fast);
  -webkit-appearance: none;
}

.input::placeholder { color: var(--text-quaternary); }
.input:hover { border-color: var(--border-primary); }
.input:focus {
  border-color: var(--border-focus);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--border-focus) 20%, transparent);
}
.input:disabled { opacity: 0.5; cursor: not-allowed; }
.input.error { border-color: var(--border-error); }
.input.success { border-color: var(--border-success); }

.input-lg { padding: var(--spacing-4) var(--spacing-5); font-size: var(--font-size-lg); }
.input-sm { padding: var(--spacing-2) var(--spacing-3); font-size: var(--font-size-sm); }

textarea.input { min-height: 100px; resize: vertical; line-height: var(--line-height-relaxed); }

.form-hint { font-size: var(--font-size-xs); color: var(--text-tertiary); margin-top: var(--spacing-1); }
.form-error { font-size: var(--font-size-xs); color: var(--border-error); margin-top: var(--spacing-1); }

/* Select */
.select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238e8e93' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-4) center;
  padding-right: 40px;
}

/* Lists / Table */
.list { display: flex; flex-direction: column; gap: var(--spacing-2); }
.list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-secondary);
  transition: background var(--transition-fast);
}
.list-item:active { background: var(--bg-tertiary); }
.list-item-content { flex: 1; min-width: 0; }
.list-item-title { font-size: var(--font-size-base); font-weight: var(--font-weight-medium); color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.list-item-subtitle { font-size: var(--font-size-sm); color: var(--text-tertiary); margin-top: var(--spacing-1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.list-item-action { flex-shrink: 0; }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.badge-blue { background: color-mix(in srgb, var(--accent-blue) 15%, transparent); color: var(--accent-blue); }
.badge-green { background: color-mix(in srgb, var(--accent-green) 15%, transparent); color: var(--accent-green); }
.badge-orange { background: color-mix(in srgb, var(--accent-orange) 15%, transparent); color: var(--accent-orange); }
.badge-red { background: color-mix(in srgb, var(--accent-red) 15%, transparent); color: var(--accent-red); }
.badge-purple { background: color-mix(in srgb, var(--accent-purple) 15%, transparent); color: var(--accent-purple); }
.badge-gray { background: var(--bg-tertiary); color: var(--text-tertiary); }

/* Section */
.section { margin-bottom: var(--spacing-8); }
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--spacing-4); }
.section-title { font-size: var(--font-size-sm); font-weight: var(--font-weight-semibold); color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.5px; }
.section-action { font-size: var(--font-size-sm); color: var(--text-link); }

/* Divider */
.divider { height: 1px; background: var(--border-secondary); margin: var(--spacing-4) calc(var(--spacing-5) * -1); }
.divider-inset { margin-left: var(--spacing-5); margin-right: var(--spacing-5); }

/* Grid */
.grid { display: grid; gap: var(--spacing-3); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

@media (max-width: 480px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

/* Toast / Alert */
.toast {
  position: fixed;
  bottom: calc(var(--spacing-6) + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: var(--spacing-3) var(--spacing-5);
  background: var(--bg-card-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  opacity: 0;
  z-index: 10000;
  transition: all var(--transition-normal);
  pointer-events: none;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; pointer-events: auto; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
  background: var(--bg-modal-backdrop);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}
.modal-overlay.show { opacity: 1; visibility: visible; }

.modal {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
  overflow: hidden;
}
.modal-overlay.show .modal { transform: scale(1); }

.modal-header { display: flex; align-items: center; justify-content: space-between; padding: var(--spacing-4) var(--spacing-5); border-bottom: 1px solid var(--border-secondary); }
.modal-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }
.modal-close { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: var(--radius-full); background: transparent; border: none; color: var(--text-tertiary); font-size: 20px; cursor: pointer; transition: all var(--transition-fast); }
.modal-close:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.modal-close:active { transform: scale(0.9); }
.modal-body { padding: var(--spacing-5); max-height: 60vh; overflow-y: auto; }
.modal-footer { display: flex; justify-content: flex-end; gap: var(--spacing-3); padding: var(--spacing-4) var(--spacing-5); border-top: 1px solid var(--border-secondary); background: var(--bg-tertiary); }

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.spinner-sm { width: 16px; height: 16px; border-width: 1.5px; }
.spinner-lg { width: 28px; height: 28px; border-width: 2.5px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Empty State */
.empty-state { text-align: center; padding: var(--spacing-10) var(--spacing-6); color: var(--text-tertiary); }
.empty-state-icon { font-size: 48px; margin-bottom: var(--spacing-4); opacity: 0.5; }
.empty-state-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--text-secondary); margin-bottom: var(--spacing-2); }
.empty-state-text { font-size: var(--font-size-base); max-width: 280px; margin: 0 auto; line-height: var(--line-height-relaxed); }

/* Separator List (iOS Settings Style) */
.separator-list { background: var(--bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--border-secondary); overflow: hidden; }
.separator-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-5);
  border-bottom: 1px solid var(--border-secondary);
}
.separator-list-item:last-child { border-bottom: none; }
.separator-list-item:active { background: var(--bg-tertiary); }

/* Navigation Bar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  padding: 0 var(--spacing-4);
  background: rgba(242, 242, 247, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-secondary);
}
@media (prefers-color-scheme: dark) {
  .navbar { background: rgba(0, 0, 0, 0.8); }
}
.navbar-title { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); color: var(--text-primary); }
.navbar-left, .navbar-right { display: flex; align-items: center; gap: var(--spacing-3); }

/* Tab Bar */
.tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  background: rgba(242, 242, 247, 0.9);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-top: 1px solid var(--border-secondary);
  padding-bottom: var(--safe-bottom);
}
@media (prefers-color-scheme: dark) {
  .tabbar { background: rgba(0, 0, 0, 0.9); }
}
.tabbar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: var(--spacing-2) 0;
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}
.tabbar-item.active { color: var(--accent-blue); }
.tabbar-item:active { opacity: 0.7; }
.tabbar-icon { font-size: 22px; line-height: 1; }

/* Utility Classes */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.visually-hidden { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-5 { gap: var(--spacing-5); }

.w-full { width: 100%; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }

.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }
.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.py-3 { padding-top: var(--spacing-3); padding-bottom: var(--spacing-3); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.break-all { word-break: break-all; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-50 { z-index: 50; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.transition { transition: all var(--transition-normal); }
.transition-fast { transition: all var(--transition-fast); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

.animate-fade-in { animation: fadeIn var(--transition-normal) ease-out forwards; }
.animate-slide-up { animation: slideUp var(--transition-normal) ease-out forwards; }
.animate-slide-down { animation: slideDown var(--transition-normal) ease-out forwards; }
.animate-scale-in { animation: scaleIn var(--transition-normal) ease-out forwards; }

/* Reduced Motion */
@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;
  }
}

/* Print */
@media print {
  .navbar, .tabbar, .btn, .modal-overlay, .toast { display: none !important; }
  body { background: white; color: black; }
  .card { border: 1px solid #ccc; box-shadow: none; }
}