/* Light Mode as Default */
:root {
  /* Light Mode Colors */
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #4361ee;
  --secondary: #3f37c9;
  --success: #0ea5e9;
  --info: #4361ee;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 14px;
  --radius-lg: 20px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
  --gradient-success: linear-gradient(135deg, var(--success), #4361ee);
  --surface: #ffffff;
  --surface-elevated: #ffffff;
  --surface-hover: #f1f5f9;
}

/* Dark Mode Colors */
[data-theme="dark"] {
  --bg: #0b0e14;
  --card: #141a22;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #334155;
  --primary: #4361ee;
  --secondary: #3f37c9;
  --success: #4cc9f0;
  --info: #4361ee;
  --warning: #fbbf24;
  --danger: #f87171;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --surface: #141a22;
  --surface-elevated: #1e293b;
  --surface-hover: #1e293b;
}

/* System Preference Detection */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0e14;
    --card: #141a22;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #334155;
    --primary: #4361ee;
    --secondary: #3f37c9;
    --success: #4cc9f0;
    --info: #4361ee;
    --warning: #fbbf24;
    --danger: #f87171;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --surface: #141a22;
    --surface-elevated: #1e293b;
    --surface-hover: #1e293b;
  }
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  background: radial-gradient(circle at 0% 0%, rgba(67, 97, 238, 0.08) 0%, transparent 50%),
              radial-gradient(circle at 100% 0%, rgba(76, 201, 240, 0.05) 0%, transparent 50%),
              var(--bg);
}

[data-theme="dark"] body {
  background: radial-gradient(circle at 0% 0%, rgba(67, 97, 238, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 100% 0%, rgba(76, 201, 240, 0.1) 0%, transparent 50%),
              var(--bg);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px;
}

/* Theme Toggle Button */
.theme-toggle {
  position: relative;
  width: 48px;
  height: 24px;
  border-radius: 999px;
  background: var(--surface-hover);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text);
  transition: transform 0.3s ease;
}

[data-theme="dark"] .theme-toggle::before {
  transform: translateX(24px);
}

.theme-toggle::after {
  content: '☀️';
  position: absolute;
  left: 5px;
  font-size: 12px;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

[data-theme="dark"] .theme-toggle::after {
  content: '🌙';
  left: auto;
  right: 5px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface-elevated);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--shadow);
  position: sticky;
  top: 20px;
  z-index: 100;
  margin-bottom: 30px;
  transition: all 0.3s ease;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.logo::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
}

.brand-title {
  font-weight: 800;
  letter-spacing: 0.3px;
  font-size: 20px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-sub {
  font-size: 13px;
  color: var(--muted);
  opacity: 0.8;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border);
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  font-size: 14px;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(67, 97, 238, 0.1), transparent);
  transition: left 0.6s;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
  background: var(--surface-hover);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: var(--gradient-primary);
  border: 0;
  color: white;
  box-shadow: 0 4px 15px rgba(67, 97, 238, 0.3);
}

.btn.primary:hover {
  box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
  transform: translateY(-2px);
}

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

.btn.ghost:hover {
  background: var(--surface-hover);
}

.btn.small {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-group {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Hero Section */
.hero {
  margin: 30px 0 40px;
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(67, 97, 238, 0.1), transparent 70%);
  border-radius: 50%;
}

[data-theme="light"] .hero::before {
  background: radial-gradient(circle, rgba(67, 97, 238, 0.05), transparent 70%);
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 18px;
  max-width: 600px;
  opacity: 0.9;
}

/* Grid & Cards */
.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  margin: 30px 0;
}

.card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s;
}

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

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  background: var(--surface-hover);
}

.card .pad {
  padding: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 16px;
}

.card-title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-weight: 500;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: var(--surface);
}

.badge.premium {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(67, 97, 238, 0.1));
  color: #b45309;
  border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="dark"] .badge.premium {
  color: #ffeaa7;
  border-color: rgba(255, 215, 0, 0.3);
}

.badge.pending {
  background: rgba(245, 158, 11, 0.1);
  color: #b45309;
  border-color: rgba(245, 158, 11, 0.3);
}

[data-theme="dark"] .badge.pending {
  background: rgba(255, 214, 165, 0.1);
  color: #ffd6a5;
}

.badge.approved {
  background: rgba(34, 197, 94, 0.1);
  color: #166534;
  border-color: rgba(34, 197, 94, 0.3);
}

[data-theme="dark"] .badge.approved {
  background: rgba(183, 255, 207, 0.1);
  color: #b7ffcf;
}

/* Meta Information */
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
}

.meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}

.meta span:hover {
  color: var(--text);
}

/* Filters & Forms */
.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0;
  padding: 20px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.input, select, textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  outline: none;
  font-family: inherit;
  font-size: 14px;
  transition: var(--transition);
}

.input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
  background: var(--surface);
}

.input::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

textarea {
  min-height: 140px;
  resize: vertical;
  line-height: 1.6;
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 20px 0;
}

@media (max-width: 768px) {
  .row {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .hero {
    padding: 30px 20px;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .container {
    padding: 16px;
  }
  
  .topbar {
    padding: 12px 16px;
    top: 10px;
  }
}

/* Footer */
.footer {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  opacity: 0.7;
}

.hr {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
  margin: 24px 0;
  border: none;
}

.note {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  padding: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary);
}

/* Steps */
.steps {
  display: flex;
  gap: 8px;
  margin: 24px 0;
  flex-wrap: wrap;
}

.step {
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--muted);
  background: var(--surface);
  transition: var(--transition);
}

.step.active {
  background: rgba(67, 97, 238, 0.1);
  color: var(--text);
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(67, 97, 238, 0.1);
}

/* Table */
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.table th, .table td {
  border-bottom: 1px solid var(--border);
  padding: 16px;
  font-size: 14px;
  text-align: left;
  color: var(--text);
}

.table th {
  background: var(--surface-hover);
  font-weight: 600;
}

.table tr {
  transition: background-color 0.2s;
}

.table tr:hover {
  background: var(--surface-hover);
}

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

/* Loading State */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.loading {
  background: linear-gradient(90deg, 
              var(--surface) 25%, 
              var(--surface-hover) 50%, 
              var(--surface) 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--surface);
}

::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Utility Classes */
.text-muted {
  color: var(--muted);
}

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

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

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

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

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

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

.border-color {
  border-color: var(--border);
}