/**
 * Volka Design System
 * Version: 1.0.0
 *
 * A Stripe-inspired design system with teal accent color.
 * This file contains all design tokens, base styles, and components.
 */

/* =============================================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================================= */

:root {
  /* Colors - Teal Accent Theme */
  --color-primary: #0a2540;
  --color-accent: #0d9488;
  --color-accent-hover: #0f766e;
  --color-accent-active: #115e59;
  --color-accent-light: #ccfbf1;
  --color-accent-subtle: #f0fdfa;

  /* Semantic Colors */
  --color-success: #059669;
  --color-success-light: #d1fae5;
  --color-success-dark: #047857;
  --color-warning: #d97706;
  --color-warning-light: #fef3c7;
  --color-warning-dark: #b45309;
  --color-error: #dc2626;
  --color-error-light: #fee2e2;
  --color-error-dark: #b91c1c;
  --color-info: #0284c7;
  --color-info-light: #e0f2fe;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-surface: #ffffff;
  --color-background: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --color-border-focus: var(--color-accent);

  /* Text Colors */
  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-text-disabled: #cbd5e1;
  --color-text-inverse: #ffffff;
  --color-text-link: var(--color-accent);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, Consolas, 'Courier New', monospace;

  /* Font Sizes */
  --text-xs: 0.75rem;
  /* 12px */
  --text-sm: 0.875rem;
  /* 14px */
  --text-base: 1rem;
  /* 16px */
  --text-lg: 1.125rem;
  /* 18px */
  --text-xl: 1.25rem;
  /* 20px */
  --text-2xl: 1.5rem;
  /* 24px */
  --text-3xl: 1.875rem;
  /* 30px */
  --text-4xl: 2.25rem;
  /* 36px */

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;

  /* Spacing Scale (4px base) */
  --space-0: 0;
  --space-1: 0.25rem;
  /* 4px */
  --space-2: 0.5rem;
  /* 8px */
  --space-3: 0.75rem;
  /* 12px */
  --space-4: 1rem;
  /* 16px */
  --space-5: 1.25rem;
  /* 20px */
  --space-6: 1.5rem;
  /* 24px */
  --space-8: 2rem;
  /* 32px */
  --space-10: 2.5rem;
  /* 40px */
  --space-12: 3rem;
  /* 48px */
  --space-16: 4rem;
  /* 64px */
  --space-20: 5rem;
  /* 80px */
  --space-24: 6rem;
  /* 96px */

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 72px;
  --header-height: 64px;
  --mobile-nav-height: 56px;
  --max-content-width: 1280px;
  --max-form-width: 560px;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
  --shadow-focus: 0 0 0 3px rgba(13, 148, 136, 0.2);

  /* Enhanced Elevation Shadows */
  --shadow-elevation-1: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-elevation-2: 0 4px 16px rgba(0, 0, 0, 0.12);
  --shadow-elevation-3: 0 8px 24px rgba(0, 0, 0, 0.15);

  /* Gradients */
  --gradient-accent: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
  --gradient-accent-hover: linear-gradient(135deg, #0f766e 0%, #115e59 100%);
  --gradient-card-subtle: linear-gradient(135deg, rgba(255, 255, 255, 0) 0%, rgba(13, 148, 136, 0.03) 100%);
  --gradient-shimmer: linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.6) 50%, rgba(255, 255, 255, 0) 100%);

  /* Transitions */
  --transition-fast: 100ms ease;
  --transition-base: 150ms ease;
  --transition-slow: 300ms ease;
  --transition-slower: 500ms ease;

  /* Z-Index Scale */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
}

/* =============================================================================
   ANIMATIONS & KEYFRAMES
   ============================================================================= */

/* Entrance Animation - Fade + Slide Up */
@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Shimmer Effect */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

/* Pulse */
@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.5;
  }
}

/* Spin */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =============================================================================
   2. CSS RESET & BASE STYLES
   ============================================================================= */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -moz-tab-size: 4;
  tab-size: 4;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Remove default list styles */
ul,
ol {
  list-style: none;
}

/* Better image defaults */
img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Remove default button styles */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

/* Remove default input styles */
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* Better link defaults */
a {
  color: inherit;
  text-decoration: none;
}

/* Remove animations for reduced motion preference */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* =============================================================================
   3. TYPOGRAPHY
   ============================================================================= */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}

h1 {
  font-size: var(--text-3xl);
}

h2 {
  font-size: var(--text-2xl);
}

h3 {
  font-size: var(--text-xl);
}

h4 {
  font-size: var(--text-lg);
}

h5 {
  font-size: var(--text-base);
}

h6 {
  font-size: var(--text-sm);
}

p {
  margin-bottom: var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

.text-xs {
  font-size: var(--text-xs);
}

.text-sm {
  font-size: var(--text-sm);
}

.text-base {
  font-size: var(--text-base);
}

.text-lg {
  font-size: var(--text-lg);
}

.text-xl {
  font-size: var(--text-xl);
}

.text-2xl {
  font-size: var(--text-2xl);
}

.text-3xl {
  font-size: var(--text-3xl);
}

.font-normal {
  font-weight: var(--font-normal);
}

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

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

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

.text-primary {
  color: var(--color-text-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-tertiary {
  color: var(--color-text-tertiary);
}

.text-muted {
  color: var(--color-text-tertiary);
}

.text-success {
  color: var(--color-success);
}

.text-warning {
  color: var(--color-warning);
}

.text-error {
  color: var(--color-error);
}

.text-accent {
  color: var(--color-accent);
}

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

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

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

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

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* =============================================================================
   4. LAYOUT UTILITIES
   ============================================================================= */

.container {
  width: 100%;
  max-width: var(--max-content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* Flexbox */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-col {
  flex-direction: column;
}

.flex-row {
  flex-direction: row;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.flex-1 {
  flex: 1 1 0%;
}

.flex-auto {
  flex: 1 1 auto;
}

.flex-none {
  flex: none;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

.flex-grow {
  flex-grow: 1;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.items-stretch {
  align-items: stretch;
}

.items-baseline {
  align-items: baseline;
}

.justify-start {
  justify-content: flex-start;
}

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

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.self-start {
  align-self: flex-start;
}

.self-center {
  align-self: center;
}

.self-end {
  align-self: flex-end;
}

/* Grid */
.grid {
  display: grid;
}

.grid-cols-1 {
  grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (min-width: 640px) {
  .sm\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sm\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .md\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* Gap */
.gap-1 {
  gap: var(--space-1);
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-5 {
  gap: var(--space-5);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

/* =============================================================================
   5. SPACING UTILITIES
   ============================================================================= */

/* Margin */
.m-0 {
  margin: 0;
}

.m-1 {
  margin: var(--space-1);
}

.m-2 {
  margin: var(--space-2);
}

.m-3 {
  margin: var(--space-3);
}

.m-4 {
  margin: var(--space-4);
}

.m-auto {
  margin: auto;
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--space-1);
}

.mt-2 {
  margin-top: var(--space-2);
}

.mt-3 {
  margin-top: var(--space-3);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--space-1);
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-3 {
  margin-bottom: var(--space-3);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.ml-auto {
  margin-left: auto;
}

.mr-auto {
  margin-right: auto;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* Padding */
.p-0 {
  padding: 0;
}

.p-1 {
  padding: var(--space-1);
}

.p-2 {
  padding: var(--space-2);
}

.p-3 {
  padding: var(--space-3);
}

.p-4 {
  padding: var(--space-4);
}

.p-5 {
  padding: var(--space-5);
}

.p-6 {
  padding: var(--space-6);
}

.p-8 {
  padding: var(--space-8);
}

.px-2 {
  padding-left: var(--space-2);
  padding-right: var(--space-2);
}

.px-3 {
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.px-4 {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.px-6 {
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.py-1 {
  padding-top: var(--space-1);
  padding-bottom: var(--space-1);
}

.py-2 {
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.py-3 {
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.py-6 {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

/* =============================================================================
   6. DISPLAY & VISIBILITY
   ============================================================================= */

.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

.inline {
  display: inline;
}

.visible {
  visibility: visible;
}

.invisible {
  visibility: hidden;
}

.opacity-0 {
  opacity: 0;
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-100 {
  opacity: 1;
}

/* Responsive display */
@media (max-width: 639px) {
  .sm\:hidden {
    display: none;
  }
}

@media (min-width: 640px) {
  .sm\:block {
    display: block;
  }

  .sm\:flex {
    display: flex;
  }
}

@media (max-width: 767px) {
  .md\:hidden {
    display: none;
  }
}

@media (min-width: 768px) {
  .md\:block {
    display: block;
  }

  .md\:flex {
    display: flex;
  }
}

@media (max-width: 1023px) {
  .lg\:hidden {
    display: none;
  }
}

@media (min-width: 1024px) {
  .lg\:block {
    display: block;
  }

  .lg\:flex {
    display: flex;
  }
}

/* =============================================================================
   7. BUTTONS
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  -webkit-user-select: none;
  user-select: none;
}

.btn:focus {
  outline: none;
  box-shadow: var(--shadow-focus);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary Button */
.btn-primary {
  color: var(--color-text-inverse);
  background: var(--gradient-accent);
  border-color: transparent;
  box-shadow: 0 1px 3px rgba(13, 148, 136, 0.15);
}

.btn-primary:hover {
  background: var(--gradient-accent-hover);
  box-shadow: 0 2px 6px rgba(13, 148, 136, 0.25);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: var(--gradient-accent-hover);
  transform: translateY(0);
  box-shadow: 0 1px 3px rgba(13, 148, 136, 0.15);
}

/* Secondary Button */
.btn-secondary {
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-background);
  border-color: var(--color-border-hover);
}

.btn-secondary:active {
  background-color: var(--color-border);
}

/* Ghost Button */
.btn-ghost {
  color: var(--color-text-secondary);
  background-color: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

.btn-ghost:active {
  background-color: var(--color-border);
}

/* Danger Button */
.btn-danger {
  color: var(--color-text-inverse);
  background-color: var(--color-error);
  border-color: var(--color-error);
}

.btn-danger:hover {
  background-color: var(--color-error-dark);
  border-color: var(--color-error-dark);
}

/* Success Button */
.btn-success {
  color: var(--color-text-inverse);
  background-color: var(--color-success);
  border-color: var(--color-success);
}

.btn-success:hover {
  background-color: var(--color-success-dark);
  border-color: var(--color-success-dark);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
}

.btn-full {
  width: 100%;
}

/* Icon Button */
.btn-icon {
  padding: var(--space-2);
  width: 36px;
  height: 36px;
}

.btn-icon.btn-sm {
  width: 28px;
  height: 28px;
  padding: var(--space-1);
}

.btn-icon.btn-lg {
  width: 44px;
  height: 44px;
}

/* =============================================================================
   8. FORMS
   ============================================================================= */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.form-label .required {
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-border-hover);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background-color: var(--color-background);
  color: var(--color-text-disabled);
  cursor: not-allowed;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-hint {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.form-error {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-error);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check input[type="checkbox"],
.form-check input[type="radio"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.form-check-label {
  font-size: var(--text-sm);
  color: var(--color-text-primary);
}

/* Select */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' fill='none' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
  background-size: 20px;
  padding-right: var(--space-10);
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.toggle-slider::before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: var(--color-surface);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.toggle input:checked+.toggle-slider {
  background-color: var(--color-accent);
}

.toggle input:checked+.toggle-slider::before {
  transform: translateX(20px);
}

.toggle input:focus+.toggle-slider {
  box-shadow: var(--shadow-focus);
}

/* =============================================================================
   9. CARDS
   ============================================================================= */

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  animation: fadeSlideUp 0.4s ease-out;
  box-shadow: var(--shadow-elevation-1);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card-header {
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-background);
}

/* Clickable Card */
.card-clickable {
  cursor: pointer;
}

.card-clickable:hover {
  box-shadow: var(--shadow-elevation-2);
  transform: translateY(-2px) scale(1.01);
}

.card-clickable:active {
  transform: translateY(0) scale(1);
  box-shadow: var(--shadow-elevation-1);
}

/* =============================================================================
   10. BADGES
   ============================================================================= */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  line-height: 1;
  white-space: nowrap;
  border-radius: var(--radius-sm);
  background-color: var(--color-background);
  color: var(--color-text-secondary);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success-dark);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error-dark);
}

.badge-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.badge-accent {
  background-color: var(--color-accent-light);
  color: var(--color-accent);
}

/* Pill Badge */
.badge-pill {
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}

/* Dot Badge */
.badge-dot {
  position: relative;
  padding-left: var(--space-4);
}

.badge-dot::before {
  content: '';
  position: absolute;
  left: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: currentColor;
}

/* =============================================================================
   11. TABLES
   ============================================================================= */

.table-container {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  vertical-align: middle;
}

.table th {
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

.table td {
  border-bottom: 1px solid var(--color-border);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

.table-striped tbody tr:nth-child(even) {
  background-color: var(--color-background);
}

.table-hover tbody tr:hover {
  background-color: var(--color-accent-subtle);
}

/* =============================================================================
   12. STATS CARDS
   ============================================================================= */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
}

.stat-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: box-shadow var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
}

.stat-value {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-none);
}

.stat-change {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-error);
}

/* =============================================================================
   13. ICONS
   ============================================================================= */

.icon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-xs {
  width: 14px;
  height: 14px;
}

.icon-sm {
  width: 18px;
  height: 18px;
}

.icon-md {
  width: 20px;
  height: 20px;
}

.icon-lg {
  width: 24px;
  height: 24px;
}

.icon-xl {
  width: 32px;
  height: 32px;
}

.icon-filled {
  fill: currentColor;
  stroke: none;
}

/* =============================================================================
   14. EMPTY STATES
   ============================================================================= */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-6);
}

.empty-state-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.empty-state-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.empty-state-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  max-width: 320px;
  margin-bottom: var(--space-6);
}

/* =============================================================================
   15. LOADING STATES
   ============================================================================= */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  gap: var(--space-4);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 48px;
  height: 48px;
  border-width: 4px;
}

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

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

/* Skeleton Loading */
.skeleton {
  background: linear-gradient(90deg,
      var(--color-border) 0%,
      var(--color-background) 50%,
      var(--color-border) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }

  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--space-3);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* =============================================================================
   16. MODALS & DIALOGS
   ============================================================================= */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.modal-backdrop.active {
  opacity: 1;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  width: calc(100% - var(--space-8));
  max-width: 480px;
  max-height: calc(100vh - var(--space-16));
  background-color: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
  overflow: hidden;
}

.modal.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

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

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
}

.modal-close {
  padding: var(--space-1);
  color: var(--color-text-tertiary);
  transition: color var(--transition-base);
}

.modal-close:hover {
  color: var(--color-text-primary);
}

.modal-body {
  padding: var(--space-5);
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-background);
}

/* Native Dialog */
dialog.modal {
  padding: 0;
  border: none;
  max-width: 480px;
  width: calc(100% - var(--space-8));
}

dialog.modal::backdrop {
  background-color: rgba(0, 0, 0, 0.5);
}

/* =============================================================================
   17. ALERTS & MESSAGES
   ============================================================================= */

.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.alert-success {
  background-color: var(--color-success-light);
  color: var(--color-success-dark);
}

.alert-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.alert-error {
  background-color: var(--color-error-light);
  color: var(--color-error-dark);
}

/* =============================================================================
   18. DIVIDERS
   ============================================================================= */

.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-4) 0;
}

.divider-vertical {
  width: 1px;
  height: 100%;
  background-color: var(--color-border);
  margin: 0 var(--space-4);
}

/* =============================================================================
   19. REVIEW SPECIFIC COMPONENTS
   ============================================================================= */

/* Star Rating Display */
.star-rating {
  color: #f59e0b;
  font-size: var(--text-lg);
  letter-spacing: 2px;
}

.star-rating-sm {
  font-size: var(--text-sm);
  letter-spacing: 1px;
}

/* Review Card */
.review-card {
  display: block;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.review-card:last-child {
  border-bottom: none;
}

.review-card:hover {
  background-color: var(--color-accent-subtle);
}

.review-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.reviewer-name {
  font-weight: var(--font-medium);
  color: var(--color-text-primary);
}

.review-text {
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-2);
}

.review-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

/* =============================================================================
   20. UTILITY CLASSES
   ============================================================================= */

/* Borders */
.border {
  border: 1px solid var(--color-border);
}

.border-t {
  border-top: 1px solid var(--color-border);
}

.border-b {
  border-bottom: 1px solid var(--color-border);
}

.border-none {
  border: none;
}

/* Border Radius */
.rounded-none {
  border-radius: 0;
}

.rounded-sm {
  border-radius: var(--radius-sm);
}

.rounded {
  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);
}

/* Background */
.bg-white {
  background-color: var(--color-white);
}

.bg-surface {
  background-color: var(--color-surface);
}

.bg-background {
  background-color: var(--color-background);
}

.bg-accent {
  background-color: var(--color-accent);
}

.bg-accent-light {
  background-color: var(--color-accent-light);
}

/* Width & Height */
.w-full {
  width: 100%;
}

.w-auto {
  width: auto;
}

.h-full {
  height: 100%;
}

.h-screen {
  height: 100vh;
}

.min-h-screen {
  min-height: 100vh;
}

/* Position */
.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.fixed {
  position: fixed;
}

.sticky {
  position: sticky;
}

.inset-0 {
  inset: 0;
}

.top-0 {
  top: 0;
}

.right-0 {
  right: 0;
}

.bottom-0 {
  bottom: 0;
}

.left-0 {
  left: 0;
}

/* Overflow */
.overflow-hidden {
  overflow: hidden;
}

.overflow-auto {
  overflow: auto;
}

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

.overflow-y-auto {
  overflow-y: auto;
}

/* Cursor */
.cursor-pointer {
  cursor: pointer;
}

.cursor-not-allowed {
  cursor: not-allowed;
}

/* Pointer Events */
.pointer-events-none {
  pointer-events: none;
}

.pointer-events-auto {
  pointer-events: auto;
}

/* Transitions */
.transition {
  transition: all var(--transition-base);
}

.transition-colors {
  transition: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.transition-transform {
  transition: transform var(--transition-base);
}

/* Shadow */
.shadow-none {
  box-shadow: none;
}

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

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

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

/* SR Only - Screen Reader Only */
.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;
}
/* =============================================================================
   6. COMPONENTS
   ============================================================================= */

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success-dark);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.badge-error {
  background-color: var(--color-error-light);
  color: var(--color-error-dark);
}

.badge-info {
  background-color: var(--color-info-light);
  color: var(--color-info);
}

.badge-secondary {
  background-color: var(--color-background);
  color: var(--color-text-secondary);
}

/* Review Card (Shared) */
.review-card {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  margin-bottom: var(--space-4);
  display: block; /* Ensure it works as a link */
  text-decoration: none;
}

.review-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.review-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.review-card-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.reviewer-avatar {
  width: 40px;
  height: 40px;
  background-color: var(--color-accent-light);
  color: var(--color-accent-dark); /* Fallback or calculate */
  color: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: var(--text-lg);
}

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

.reviewer-name {
  font-weight: 600;
  color: var(--color-text-primary);
  font-size: var(--text-sm);
}

.review-date {
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
}

.review-card-right .review-rating {
  color: #f59e0b;
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.review-card-body .review-text {
  color: var(--color-text-secondary);
  line-height: 1.6;
  font-size: var(--text-sm);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.review-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.review-action {
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 4px;
}

.review-action:hover {
  text-decoration: underline;
}

/* Stat Cards */
.stat-card {
  background-color: var(--color-surface);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.stat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.stat-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon.warning {
  background-color: var(--color-warning-light);
  color: var(--color-warning);
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

.stat-change {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-error);
}

/* Card (Generic) */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.card-body {
  padding: var(--space-6);
}

/* Interactive Card (Quick Actions) */
.card-interactive {
  display: block;
  text-decoration: none;
  transition: all var(--transition-base);
  height: 100%;
}

.card-interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.action-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  transition: transform var(--transition-base);
}

.card-interactive:hover .action-icon {
  transform: scale(1.1);
}

.action-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.action-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Chart Card */
.chart-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.chart-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}