/*
 * Agrora - Apple Design System
 * Based on Apple Human Interface Guidelines
 */

/* ========================================
   CSS Variables - Apple Design System
   ======================================== */

:root {
  /* System Colors - Light Mode */
  --apple-blue: #007AFF;
  --apple-green: #34C759;
  --apple-indigo: #5856D6;
  --apple-orange: #FF9500;
  --apple-pink: #FF2D55;
  --apple-purple: #AF52DE;
  --apple-red: #FF3B30;
  --apple-teal: #5AC8FA;
  --apple-yellow: #FFCC00;

  /* Grays */
  --apple-gray: #8E8E93;
  --apple-gray-2: #AEAEB2;
  --apple-gray-3: #C7C7CC;
  --apple-gray-4: #D1D1D6;
  --apple-gray-5: #E5E5EA;
  --apple-gray-6: #F2F2F7;

  /* Backgrounds */
  --apple-bg-primary: #FFFFFF;
  --apple-bg-secondary: #F2F2F7;
  --apple-bg-tertiary: #FFFFFF;

  /* Text */
  --text-primary: #1D1D1F;
  --text-secondary: #86868B;
  --text-tertiary: #AEAEB2;

  /* Leaf Token Colors */
  --leaf-green: #34C759;
  --leaf-gold: #FFD60A;

  /* Font Family */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;

  /* Font Weights */
  --font-light: 300;
  --font-regular: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Font Sizes */
  --text-large-title: 34px;
  --text-title-1: 28px;
  --text-title-2: 22px;
  --text-title-3: 20px;
  --text-headline: 17px;
  --text-body: 17px;
  --text-callout: 16px;
  --text-subhead: 15px;
  --text-footnote: 13px;
  --text-caption-1: 12px;
  --text-caption-2: 11px;

  /* Spacing - 8pt Grid */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.42, 0, 0.58, 1);
  --ease-spring: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --duration-fast: 200ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

/* Dark Mode Variables - System Preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --apple-blue: #0A84FF;
    --apple-green: #30D158;
    --apple-indigo: #5E5CE6;
    --apple-orange: #FF9F0A;
    --apple-pink: #FF375F;
    --apple-purple: #BF5AF2;
    --apple-red: #FF453A;
    --apple-teal: #64D2FF;
    --apple-yellow: #FFD60A;

    --apple-gray: #8E8E93;
    --apple-gray-2: #636366;
    --apple-gray-3: #48484A;
    --apple-gray-4: #3A3A3C;
    --apple-gray-5: #2C2C2E;
    --apple-gray-6: #1C1C1E;

    --apple-bg-primary: #000000;
    --apple-bg-secondary: #1C1C1E;
    --apple-bg-tertiary: #2C2C2E;

    --text-primary: #F5F5F7;
    --text-secondary: #A1A1A6;
    --text-tertiary: #636366;

    --bg-primary: #000000;
    --bg-secondary: #1C1C1E;
    --bg-tertiary: #2C2C2E;
    --border-color: #3A3A3C;
  }
}

/* Dark Mode Variables - Manual Override */
:root[data-theme="dark"] {
  --apple-blue: #0A84FF;
  --apple-green: #30D158;
  --apple-indigo: #5E5CE6;
  --apple-orange: #FF9F0A;
  --apple-pink: #FF375F;
  --apple-purple: #BF5AF2;
  --apple-red: #FF453A;
  --apple-teal: #64D2FF;
  --apple-yellow: #FFD60A;

  --apple-gray: #8E8E93;
  --apple-gray-2: #636366;
  --apple-gray-3: #48484A;
  --apple-gray-4: #3A3A3C;
  --apple-gray-5: #2C2C2E;
  --apple-gray-6: #1C1C1E;

  --apple-bg-primary: #000000;
  --apple-bg-secondary: #1C1C1E;
  --apple-bg-tertiary: #2C2C2E;

  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-tertiary: #636366;

  --bg-primary: #000000;
  --bg-secondary: #1C1C1E;
  --bg-tertiary: #2C2C2E;
  --border-color: #3A3A3C;
}

/* Light Mode Variables - Manual Override */
:root[data-theme="light"] {
  --apple-blue: #007AFF;
  --apple-green: #34C759;
  --apple-indigo: #5856D6;
  --apple-orange: #FF9500;
  --apple-pink: #FF2D55;
  --apple-purple: #AF52DE;
  --apple-red: #FF3B30;
  --apple-teal: #5AC8FA;
  --apple-yellow: #FFCC00;

  --apple-gray: #8E8E93;
  --apple-gray-2: #AEAEB2;
  --apple-gray-3: #C7C7CC;
  --apple-gray-4: #D1D1D6;
  --apple-gray-5: #E5E5EA;
  --apple-gray-6: #F2F2F7;

  --apple-bg-primary: #FFFFFF;
  --apple-bg-secondary: #F2F2F7;
  --apple-bg-tertiary: #FFFFFF;

  --text-primary: #1D1D1F;
  --text-secondary: #86868B;
  --text-tertiary: #AEAEB2;

  --bg-primary: #FFFFFF;
  --bg-secondary: #F2F2F7;
  --bg-tertiary: #FFFFFF;
  --border-color: #E5E5EA;
}

/* ========================================
   Reset & Base Styles
   ======================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--font-regular);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--apple-bg-secondary);
  min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */

h1, .large-title {
  font-size: var(--text-large-title);
  font-weight: var(--font-bold);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2, .title-1 {
  font-size: var(--text-title-1);
  font-weight: var(--font-bold);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h3, .title-2 {
  font-size: var(--text-title-2);
  font-weight: var(--font-semibold);
  line-height: 1.35;
}

h4, .title-3 {
  font-size: var(--text-title-3);
  font-weight: var(--font-semibold);
  line-height: 1.4;
}

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

.body {
  font-size: var(--text-body);
  font-weight: var(--font-regular);
}

.callout {
  font-size: var(--text-callout);
  font-weight: var(--font-regular);
}

.subhead {
  font-size: var(--text-subhead);
  font-weight: var(--font-regular);
  color: var(--text-secondary);
}

.footnote {
  font-size: var(--text-footnote);
  font-weight: var(--font-regular);
  color: var(--text-secondary);
}

.caption {
  font-size: var(--text-caption-1);
  font-weight: var(--font-regular);
  color: var(--text-tertiary);
}

/* ========================================
   Layout Components
   ======================================== */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-sm {
  max-width: 480px;
}

.container-md {
  max-width: 768px;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

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

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

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

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

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

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

/* ========================================
   Navigation Bar (Glassmorphism)
   ======================================== */

.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  padding: var(--spacing-sm) var(--spacing-lg);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .navbar {
    background: rgba(0, 0, 0, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
}

:root[data-theme="dark"] .navbar {
  background: rgba(0, 0, 0, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-full);
  transition: background var(--duration-fast) var(--ease-out);
  font-size: 20px;
  line-height: 1;
}

.theme-toggle:hover {
  background: var(--apple-gray-5);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-title-3);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  text-decoration: none;
}

.navbar-brand .leaf-icon {
  font-size: 24px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  list-style: none;
}

.navbar-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-subhead);
  font-weight: var(--font-medium);
  transition: color var(--duration-fast) var(--ease-out);
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--text-primary);
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: nowrap;
  flex-shrink: 0;
}

.leaf-balance {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: linear-gradient(135deg, var(--leaf-green), #28a745);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
  font-size: var(--text-subhead);
}

.notification-bell {
  position: relative;
}

.notification-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--apple-red);
  color: white;
  font-size: 11px;
  font-weight: 600;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--apple-bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

.card-glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

@media (prefers-color-scheme: dark) {
  .card-glass {
    background: rgba(44, 44, 46, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: var(--text-title-3);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.card-subtitle {
  font-size: var(--text-subhead);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--duration-normal) var(--ease-out);
  min-height: 44px;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.3);
}

.btn-primary {
  background: var(--apple-blue);
  color: white;
}

.btn-primary:hover {
  background: #0051D5;
  transform: scale(1.02);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background: transparent;
  color: var(--apple-blue);
  border: 2px solid var(--apple-blue);
}

.btn-secondary:hover {
  background: var(--apple-blue);
  color: white;
  transform: scale(1.02);
}

.btn-success {
  background: var(--apple-green);
  color: white;
}

.btn-success:hover {
  background: #28a745;
  transform: scale(1.02);
}

.btn-danger {
  background: var(--apple-red);
  color: white;
}

.btn-danger:hover {
  background: #dc2626;
  transform: scale(1.02);
}

.btn-ghost {
  background: transparent;
  color: var(--apple-blue);
}

.btn-ghost:hover {
  background: rgba(0, 122, 255, 0.1);
}

.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-subhead);
  min-height: 36px;
}

.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--text-title-3);
  min-height: 52px;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ========================================
   Form Elements
   ======================================== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--text-subhead);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-family: var(--font-family);
  font-size: var(--text-body);
  color: var(--text-primary);
  background: var(--apple-bg-primary);
  border: 1px solid var(--apple-gray-4);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  min-height: 44px;
}

.form-input:focus {
  outline: none;
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
}

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

.form-input.error {
  border-color: var(--apple-red);
}

.form-error {
  font-size: var(--text-footnote);
  color: var(--apple-red);
  margin-top: var(--spacing-xs);
}

.form-hint {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

select.form-input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238E8E93' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  padding-right: var(--spacing-2xl);
}

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

.form-check-input {
  width: 20px;
  height: 20px;
  accent-color: var(--apple-blue);
  cursor: pointer;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
  background: linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
}

@media (prefers-color-scheme: dark) {
  .hero {
    background: linear-gradient(180deg, #1c1c1e 0%, #000000 100%);
  }
}

.hero h1 {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: var(--font-bold);
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.02em;
}

.hero p {
  font-size: clamp(18px, 3vw, 24px);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.5;
  margin-bottom: var(--spacing-xl);
}

/* ========================================
   Leaf Token Display
   ======================================== */

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

.leaf-amount {
  font-size: var(--text-large-title);
  font-weight: var(--font-bold);
  color: var(--leaf-green);
}

.leaf-icon {
  font-size: 32px;
}

.leaf-card {
  background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
}

@media (prefers-color-scheme: dark) {
  .leaf-card {
    background: linear-gradient(135deg, #1b5e20 0%, #2e7d32 100%);
  }
}

.leaf-card .leaf-amount {
  font-size: 48px;
  color: var(--apple-green);
  margin-bottom: var(--spacing-sm);
}

.leaf-card .leaf-label {
  color: var(--text-secondary);
  font-size: var(--text-subhead);
}

/* ========================================
   Transaction List
   ======================================== */

.transaction-list {
  list-style: none;
}

.transaction-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--apple-gray-5);
  transition: background var(--duration-fast) var(--ease-out);
}

.transaction-item:last-child {
  border-bottom: none;
}

.transaction-item:hover {
  background: var(--apple-gray-6);
}

.transaction-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

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

.transaction-date {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
}

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

.transaction-amount.positive {
  color: var(--apple-green);
}

.transaction-amount.negative {
  color: var(--apple-red);
}

/* ========================================
   Stats Grid
   ======================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
}

.stat-card {
  background: var(--apple-bg-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
}

.stat-value {
  font-size: var(--text-title-1);
  font-weight: var(--font-bold);
  color: var(--apple-blue);
}

.stat-label {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
}

/* ========================================
   Alert / Notification
   ======================================== */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.alert-success {
  background: rgba(52, 199, 89, 0.15);
  color: var(--apple-green);
  border: 1px solid var(--apple-green);
}

.alert-error {
  background: rgba(255, 59, 48, 0.15);
  color: var(--apple-red);
  border: 1px solid var(--apple-red);
}

.alert-warning {
  background: rgba(255, 149, 0, 0.15);
  color: var(--apple-orange);
  border: 1px solid var(--apple-orange);
}

.alert-info {
  background: rgba(0, 122, 255, 0.15);
  color: var(--apple-blue);
  border: 1px solid var(--apple-blue);
}

/* ========================================
   Table
   ======================================== */

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--apple-bg-primary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
}

.table th {
  background: var(--apple-gray-6);
  font-weight: var(--font-semibold);
  font-size: var(--text-subhead);
  color: var(--text-secondary);
}

.table tr:not(:last-child) td {
  border-bottom: 1px solid var(--apple-gray-5);
}

.table tr:hover td {
  background: var(--apple-gray-6);
}

/* ========================================
   Badge
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: var(--text-caption-1);
  font-weight: var(--font-semibold);
}

.badge-blue {
  background: rgba(0, 122, 255, 0.15);
  color: var(--apple-blue);
}

.badge-green {
  background: rgba(52, 199, 89, 0.15);
  color: var(--apple-green);
}

.badge-orange {
  background: rgba(255, 149, 0, 0.15);
  color: var(--apple-orange);
}

.badge-red {
  background: rgba(255, 59, 48, 0.15);
  color: var(--apple-red);
}

.badge-gray {
  background: var(--apple-gray-5);
  color: var(--apple-gray);
}

/* ========================================
   User Type Badges
   ======================================== */

.badge-student {
  background: rgba(0, 122, 255, 0.15);
  color: var(--apple-blue);
}

.badge-lecturer {
  background: rgba(175, 82, 222, 0.15);
  color: var(--apple-purple);
}

.badge-adult {
  background: rgba(255, 149, 0, 0.15);
  color: var(--apple-orange);
}

.badge-admin {
  background: rgba(255, 45, 85, 0.15);
  color: var(--apple-pink);
}

/* ========================================
   Page Layout
   ======================================== */

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  padding: var(--spacing-xl) 0;
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: var(--text-title-1);
  font-weight: var(--font-bold);
  margin-bottom: var(--spacing-sm);
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: var(--text-body);
}

/* ========================================
   Sidebar Layout
   ======================================== */

.layout-sidebar {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--apple-bg-primary);
  border-right: 1px solid var(--apple-gray-5);
  padding: var(--spacing-lg);
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav-item {
  margin-bottom: var(--spacing-xs);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
}

.sidebar-nav-link:hover {
  background: var(--apple-gray-6);
  color: var(--text-primary);
}

.sidebar-nav-link.active {
  background: var(--apple-blue);
  color: white;
}

.main-content {
  padding: var(--spacing-xl);
  background: var(--apple-bg-secondary);
}

/* ========================================
   Login / Auth Pages
   ======================================== */

.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--apple-bg-primary);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-2xl);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-logo {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
}

.auth-title {
  font-size: var(--text-title-2);
  font-weight: var(--font-bold);
  margin-bottom: var(--spacing-xs);
}

.auth-subtitle {
  color: var(--text-secondary);
  font-size: var(--text-subhead);
}

/* ========================================
   Footer
   ======================================== */

.footer {
  background: var(--apple-bg-primary);
  border-top: 1px solid var(--apple-gray-5);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--text-footnote);
}

/* ========================================
   Utility Classes
   ======================================== */

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

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-success { color: var(--apple-green); }
.text-danger { color: var(--apple-red); }
.text-warning { color: var(--apple-orange); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  .layout-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .navbar-nav {
    display: none;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .card {
    padding: var(--spacing-md);
  }

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

/* ========================================
   Animation Classes
   ======================================== */

.fade-in {
  animation: fadeIn var(--duration-normal) var(--ease-out);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-up {
  animation: slideUp var(--duration-slow) var(--ease-out);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   Notification Toast
   ======================================== */

.notification-toast {
  position: fixed;
  top: calc(var(--spacing-xl) + 60px);
  right: var(--spacing-md);
  max-width: 360px;
  background: var(--apple-bg-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: flex-start;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
  z-index: 10000;
  animation: toastSlideIn var(--duration-normal) var(--ease-out);
  border: 1px solid var(--apple-gray-5);
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: var(--font-semibold);
  font-size: var(--text-subhead);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.toast-message {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
  line-height: 1.4;
  word-break: break-word;
}

.toast-close {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--duration-fast) var(--ease-out);
}

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

/* ========================================
   Theme Toggle Button
   ======================================== */

.theme-toggle {
  background: var(--apple-bg-tertiary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-full);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  font-size: 18px;
}

.theme-toggle:hover {
  background: var(--apple-gray-6);
  transform: scale(1.05);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* ========================================
   Language Switcher
   ======================================== */

.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
  background: var(--apple-bg-tertiary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-full);
  padding: 2px;
}

.lang-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  font-size: 16px;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out);
  opacity: 0.6;
}

.lang-btn:hover {
  opacity: 1;
  background: var(--apple-gray-5);
}

.lang-btn.active {
  opacity: 1;
  background: var(--apple-blue);
}

/* ========================================
   Attachments
   ======================================== */

.attachments-section {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--apple-gray-5);
}

.attachments-title {
  font-size: var(--text-headline);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.upload-dropzone {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  border: 2px dashed var(--apple-gray-4);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  background: var(--apple-bg-secondary);
}

.upload-dropzone:hover,
.upload-dropzone.dragover {
  border-color: var(--apple-blue);
  background: rgba(0, 122, 255, 0.05);
}

.dropzone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

.dropzone-icon {
  font-size: 32px;
}

.dropzone-text {
  font-size: var(--text-body);
  color: var(--text-primary);
}

.dropzone-hint {
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
}

.upload-progress {
  margin-top: var(--spacing-md);
}

.progress-bar {
  height: 4px;
  background: var(--apple-gray-5);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--apple-blue);
  transition: width 0.3s ease;
}

.progress-text {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
  display: block;
  margin-top: var(--spacing-xs);
  text-align: center;
}

.attachments-list {
  margin-top: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.attachment-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--apple-bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--apple-gray-5);
}

.attachment-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.attachment-thumb {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.file-icon {
  font-size: 32px;
}

.attachment-info {
  flex: 1;
  min-width: 0;
}

.attachment-name {
  display: block;
  font-weight: var(--font-medium);
  color: var(--apple-blue);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attachment-name:hover {
  text-decoration: underline;
}

.attachment-meta {
  display: flex;
  gap: var(--spacing-sm);
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
  margin-top: var(--spacing-xs);
}

.attachment-delete {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  font-size: 20px;
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
}

.attachment-delete:hover {
  background: var(--apple-red);
  color: white;
}

/* ========================================
   Messages / DM
   ======================================== */

.conversations-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.conversation-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--apple-bg-primary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out);
}

.conversation-item:hover {
  background: var(--apple-bg-secondary);
  transform: translateY(-1px);
}

.conversation-item.unread {
  background: rgba(0, 122, 255, 0.05);
  border-color: var(--apple-blue);
}

.conversation-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--apple-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: var(--font-semibold);
  flex-shrink: 0;
}

.conversation-content {
  flex: 1;
  min-width: 0;
}

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

.conversation-name {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.conversation-time {
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
}

.conversation-preview {
  font-size: var(--text-subhead);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.unread-badge {
  background: var(--apple-blue);
  color: white;
  font-size: var(--text-caption-1);
  font-weight: var(--font-semibold);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* Conversation View */
.conversation-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 200px);
  max-height: 700px;
}

.conversation-header-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--apple-gray-5);
}

.conversation-user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--apple-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: var(--font-semibold);
}

.user-name {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--spacing-md) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.message-bubble {
  max-width: 70%;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  word-wrap: break-word;
}

.message-bubble.sent {
  align-self: flex-end;
  background: var(--apple-blue);
  color: white;
  border-bottom-right-radius: var(--spacing-xs);
}

.message-bubble.received {
  align-self: flex-start;
  background: var(--apple-gray-6);
  color: var(--text-primary);
  border-bottom-left-radius: var(--spacing-xs);
}

.message-content {
  line-height: 1.4;
}

.message-time {
  font-size: var(--text-caption-2);
  opacity: 0.7;
  margin-top: var(--spacing-xs);
  display: flex;
  gap: var(--spacing-sm);
}

.read-indicator {
  font-size: var(--text-caption-2);
}

.message-input-form {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--apple-gray-5);
}

.message-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--apple-gray-4);
  border-radius: var(--radius-lg);
  background: var(--apple-bg-primary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--text-body);
  resize: none;
  min-height: 44px;
  max-height: 150px;
}

.message-input:focus {
  outline: none;
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

/* ========================================
   Timeline
   ======================================== */

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--apple-gray-5);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-lg);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-icon {
  position: absolute;
  left: -40px;
  width: 36px;
  height: 36px;
  background: var(--apple-bg-primary);
  border: 2px solid var(--apple-gray-5);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.timeline-content {
  background: var(--apple-bg-primary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
}

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

.timeline-user {
  font-weight: var(--font-semibold);
  color: var(--apple-blue);
  text-decoration: none;
}

.timeline-user:hover {
  text-decoration: underline;
}

.timeline-time {
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
}

.timeline-title {
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.timeline-description {
  font-size: var(--text-subhead);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.timeline-link {
  font-size: var(--text-footnote);
  color: var(--apple-blue);
  text-decoration: none;
}

.timeline-link:hover {
  text-decoration: underline;
}

.load-more-container {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.user-profile-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.user-avatar-large {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--apple-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: var(--font-semibold);
}

.user-profile-info {
  flex: 1;
}

/* ========================================
   Badges
   ======================================== */

.badge-stats {
  display: flex;
  gap: var(--spacing-lg);
}

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

.badge-stat-value {
  display: block;
  font-size: var(--text-title-2);
  font-weight: var(--font-bold);
  color: var(--apple-blue);
}

.badge-stat-label {
  font-size: var(--text-caption-1);
  color: var(--text-secondary);
}

.badge-category {
  margin-bottom: var(--spacing-xl);
}

.badge-category-title {
  font-size: var(--text-title-3);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

.badge-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--apple-bg-primary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-lg);
  transition: all var(--duration-fast) var(--ease-out);
}

.badge-card.earned {
  background: linear-gradient(135deg, rgba(255, 214, 10, 0.1), rgba(255, 159, 10, 0.1));
  border-color: var(--apple-yellow);
}

.badge-card.locked {
  opacity: 0.6;
}

.badge-card.locked .badge-icon {
  filter: grayscale(100%);
}

.badge-icon {
  font-size: 40px;
  flex-shrink: 0;
}

.badge-info {
  flex: 1;
  min-width: 0;
}

.badge-name {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.badge-description {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.badge-progress {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.badge-progress .progress-bar {
  flex: 1;
  height: 6px;
  background: var(--apple-gray-5);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.badge-progress .progress-fill {
  height: 100%;
  background: var(--apple-blue);
  transition: width 0.5s ease;
}

.badge-progress .progress-text {
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
  white-space: nowrap;
}

.badge-earned-date {
  font-size: var(--text-caption-1);
  color: var(--apple-green);
}

.badge-points {
  font-size: var(--text-footnote);
  font-weight: var(--font-semibold);
  color: var(--apple-orange);
  background: rgba(255, 149, 0, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

/* ========================================
   QR Code
   ======================================== */

.qr-display-card {
  background: var(--apple-bg-primary);
  border: 1px solid var(--apple-gray-5);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  max-width: 400px;
  margin: 0 auto var(--spacing-xl);
}

.qr-entity-name {
  font-size: var(--text-title-3);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.qr-code-container {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-lg);
  display: inline-block;
  margin-bottom: var(--spacing-lg);
}

.qr-code-container canvas {
  display: block;
}

.qr-url {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.qr-url .form-input {
  flex: 1;
  text-align: center;
  font-size: var(--text-footnote);
}

.qr-info {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.qr-info-item {
  text-align: center;
}

.qr-info-label {
  display: block;
  font-size: var(--text-caption-1);
  color: var(--text-tertiary);
  margin-bottom: var(--spacing-xs);
}

.qr-info-value {
  font-size: var(--text-title-2);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.qr-actions {
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--apple-gray-5);
}

.regenerate-form {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.regenerate-form .form-input {
  width: auto;
}

.qr-instructions {
  background: var(--apple-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  max-width: 400px;
  margin: 0 auto;
}

.qr-instructions h3 {
  font-size: var(--text-headline);
  margin-bottom: var(--spacing-md);
}

.qr-instructions ol {
  margin: 0;
  padding-left: var(--spacing-lg);
  color: var(--text-secondary);
}

.qr-instructions li {
  margin-bottom: var(--spacing-sm);
}

/* Check-in result */
.checkin-result {
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
}

.checkin-icon {
  font-size: 80px;
  margin-bottom: var(--spacing-lg);
}

.checkin-result.success .checkin-icon {
  animation: bounceIn 0.5s ease;
}

@keyframes bounceIn {
  0% { transform: scale(0); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.checkin-title {
  font-size: var(--text-title-1);
  font-weight: var(--font-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.checkin-message {
  font-size: var(--text-body);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.checkin-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

/* ========================================
   Dark Mode
   ======================================== */

:root[data-theme="dark"] {
  --apple-blue: #0A84FF;
  --apple-green: #30D158;
  --apple-indigo: #5E5CE6;
  --apple-orange: #FF9F0A;
  --apple-pink: #FF375F;
  --apple-purple: #BF5AF2;
  --apple-red: #FF453A;
  --apple-teal: #64D2FF;
  --apple-yellow: #FFD60A;

  --apple-gray: #98989D;
  --apple-gray-2: #636366;
  --apple-gray-3: #48484A;
  --apple-gray-4: #3A3A3C;
  --apple-gray-5: #2C2C2E;
  --apple-gray-6: #1C1C1E;

  --apple-bg-primary: #000000;
  --apple-bg-secondary: #1C1C1E;
  --apple-bg-tertiary: #2C2C2E;

  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-tertiary: #636366;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.35);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --apple-blue: #0A84FF;
    --apple-green: #30D158;
    --apple-indigo: #5E5CE6;
    --apple-orange: #FF9F0A;
    --apple-pink: #FF375F;
    --apple-purple: #BF5AF2;
    --apple-red: #FF453A;
    --apple-teal: #64D2FF;
    --apple-yellow: #FFD60A;

    --apple-gray: #98989D;
    --apple-gray-2: #636366;
    --apple-gray-3: #48484A;
    --apple-gray-4: #3A3A3C;
    --apple-gray-5: #2C2C2E;
    --apple-gray-6: #1C1C1E;

    --apple-bg-primary: #000000;
    --apple-bg-secondary: #1C1C1E;
    --apple-bg-tertiary: #2C2C2E;

    --text-primary: #F5F5F7;
    --text-secondary: #A1A1A6;
    --text-tertiary: #636366;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.35);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.4);
  }
}

/* ========================================
   PWA Styles
   ======================================== */

/* PWA Install Banner */
.pwa-install-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--apple-bg-primary);
  border-top: 1px solid var(--apple-gray-5);
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s var(--ease-out);
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.pwa-install-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.pwa-install-icon {
  font-size: 40px;
  line-height: 1;
}

.pwa-install-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.pwa-install-text strong {
  font-size: var(--text-headline);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
}

.pwa-install-text span {
  font-size: var(--text-footnote);
  color: var(--text-secondary);
}

.pwa-install-actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

/* PWA Update Notification */
.pwa-update-notification {
  position: fixed;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--apple-bg-tertiary);
  border: 1px solid var(--apple-gray-4);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  z-index: 1001;
  box-shadow: var(--shadow-xl);
  animation: fadeInUp 0.3s var(--ease-out);
}

@keyframes fadeInUp {
  from {
    transform: translate(-50%, 20px);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

.pwa-update-notification span {
  font-size: var(--text-subhead);
  color: var(--text-primary);
}

.pwa-update-notification button {
  background: var(--apple-blue);
  color: white;
  border: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--text-footnote);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.pwa-update-notification button:hover {
  opacity: 0.9;
}

/* Standalone mode adjustments (when running as PWA) */
@media (display-mode: standalone) {
  .navbar {
    padding-top: env(safe-area-inset-top);
  }

  .footer {
    padding-bottom: env(safe-area-inset-bottom);
  }

  /* Hide install banner when already installed */
  .pwa-install-banner {
    display: none !important;
  }
}

/* iOS Safe Areas */
@supports (padding: env(safe-area-inset-top)) {
  .navbar {
    padding-top: max(var(--spacing-md), env(safe-area-inset-top));
  }

  .page-content {
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
  }

  .footer {
    padding-bottom: max(var(--spacing-md), env(safe-area-inset-bottom));
  }

  .pwa-install-banner {
    padding-bottom: max(var(--spacing-md), env(safe-area-inset-bottom));
  }
}

/* Mobile adjustments for install banner */
@media (max-width: 480px) {
  .pwa-install-banner {
    flex-direction: column;
    text-align: center;
  }

  .pwa-install-content {
    flex-direction: column;
  }

  .pwa-install-actions {
    width: 100%;
  }

  .pwa-install-actions .btn {
    flex: 1;
  }
}

/* ========================================
   New Sidebar Layout System
   ======================================== */

/* Navbar adjustments */
.navbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Mobile Menu Toggle (Hamburger) */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 5px;
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-out);
}

.mobile-menu-toggle:hover {
  background: var(--apple-gray-6);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--duration-fast) var(--ease-out);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Sidebar Overlay */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* Layout with Sidebar */
.layout-with-sidebar {
  display: flex;
  min-height: calc(100vh - 60px);
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--apple-bg-primary);
  border-right: 1px solid var(--apple-gray-5);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  overflow-y: auto;
  flex-shrink: 0;
  z-index: 999;
}

/* Sidebar Header (Profile) */
.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--apple-gray-5);
}

.sidebar-profile {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  text-decoration: none;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast) var(--ease-out);
}

.sidebar-profile:hover {
  background: var(--apple-gray-6);
}

.sidebar-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--apple-blue);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: var(--font-semibold);
  flex-shrink: 0;
}

.sidebar-profile-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.sidebar-username {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  font-size: var(--text-subhead);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-role {
  font-size: var(--text-caption-1);
}

/* Sidebar Navigation */
.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md) 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.nav-group {
  padding: 0 var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.nav-group-title {
  font-size: var(--text-caption-1);
  font-weight: var(--font-semibold);
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.nav-group-bottom {
  margin-top: auto;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--apple-gray-5);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: var(--text-subhead);
  transition: all var(--duration-fast) var(--ease-out);
}

.sidebar-nav-link:hover {
  background: var(--apple-gray-6);
  color: var(--text-primary);
}

.sidebar-nav-link.active {
  background: var(--apple-blue);
  color: white;
}

.sidebar-nav-link.active .nav-icon {
  opacity: 1;
}

.sidebar-nav-link.sub-link {
  padding-left: calc(var(--spacing-md) + 28px);
  font-size: var(--text-footnote);
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

/* Main Content in Sidebar Layout */
.layout-with-sidebar .main-content {
  flex: 1;
  padding: var(--spacing-xl);
  background: var(--apple-bg-secondary);
  min-width: 0;
  overflow-x: hidden;
}

/* Responsive - Tablet and Mobile */
@media (max-width: 1024px) {
  .mobile-menu-toggle {
    display: flex;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    padding-top: 60px;
    transition: left var(--duration-normal) var(--ease-out);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    left: 0;
  }

  .layout-with-sidebar .main-content {
    padding: var(--spacing-md);
  }

  body.sidebar-open {
    overflow: hidden;
  }
}

@media (max-width: 480px) {
  .sidebar {
    width: 100%;
    left: -100%;
  }

  .navbar-user .btn-ghost.btn-sm {
    padding: var(--spacing-xs);
    min-height: 36px;
  }

  .leaf-balance {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--text-footnote);
  }

  .language-switcher {
    display: none;
  }
}

/* Dark mode adjustments for sidebar */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sidebar {
    background: var(--apple-bg-secondary);
    border-right-color: var(--apple-gray-4);
  }

  :root:not([data-theme="light"]) .sidebar-header {
    border-bottom-color: var(--apple-gray-4);
  }

  :root:not([data-theme="light"]) .nav-group-bottom {
    border-top-color: var(--apple-gray-4);
  }
}

:root[data-theme="dark"] .sidebar {
  background: var(--apple-bg-secondary);
  border-right-color: var(--apple-gray-4);
}

:root[data-theme="dark"] .sidebar-header {
  border-bottom-color: var(--apple-gray-4);
}

:root[data-theme="dark"] .nav-group-bottom {
  border-top-color: var(--apple-gray-4);
}