/**
 * URLGate Modern Theme
 * Grey/White with Blue Accents
 * Mobile-First Responsive Design
 */

:root {
  /* Colors */
  --primary-blue: #4A90E2;
  --primary-blue-dark: #357ABD;
  --primary-blue-light: #6BA4E8;

  --bg-primary: #F5F7FA;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #E8EBF0;

  --text-primary: #2C3E50;
  --text-secondary: #5A6C7D;
  --text-muted: #8492A6;

  --border-light: #E1E8ED;
  --border-medium: #CBD5E0;

  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;

  --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 25px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;

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

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* Cards */
.card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  border: 1px solid var(--border-light);
  transition: box-shadow var(--transition-base);
}

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

@media (min-width: 768px) {
  .card {
    padding: var(--spacing-lg);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 44px; /* Touch-friendly */
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary-blue);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-blue-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border-medium);
}

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

.btn-success:hover:not(:disabled) {
  background: #0e9f6e;
}

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

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

@media (min-width: 640px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  text-align: center;
  transition: all var(--transition-base);
}

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

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.stat-value {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--primary-blue);
}

@media (max-width: 639px) {
  .stat-value {
    font-size: 1.5rem;
  }
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

@media (max-width: 767px) {
  table {
    font-size: 0.8125rem;
  }
}

thead {
  background: var(--bg-tertiary);
  border-bottom: 2px solid var(--border-medium);
}

th {
  padding: 0.75rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

@media (max-width: 767px) {
  th {
    padding: 0.5rem;
  }
}

td {
  padding: 0.75rem;
  border-bottom: 1px solid var(--border-light);
}

@media (max-width: 767px) {
  td {
    padding: 0.5rem;
  }
}

tr:hover {
  background: var(--bg-primary);
}

/* Table Scroll Container for Mobile */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 calc(-1 * var(--spacing-sm));
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .table-scroll {
    margin: 0;
    padding: 0;
  }
}

/* Forms */
input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  color: var(--text-primary);
  transition: all var(--transition-base);
  min-height: 44px; /* Touch-friendly */
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.badge-success {
  background: #D1FAE5;
  color: #065F46;
}

.badge-danger {
  background: #FEE2E2;
  color: #991B1B;
}

.badge-warning {
  background: #FEF3C7;
  color: #92400E;
}

/* Loading Spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-light);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  gap: var(--spacing-sm);
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  opacity: 0.5;
}

/* Responsive Utilities */
@media (max-width: 767px) {
  .hide-mobile {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .hide-desktop {
    display: none !important;
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Focus Visible */
*:focus-visible {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}