/* ===== CSS Variables & Design Tokens ===== */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.08);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-primary: #6366f1;
  --accent-primary-hover: #818cf8;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1, #06b6d4);
  --accent-gradient-hover: linear-gradient(135deg, #818cf8, #22d3ee);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --danger-hover: #f87171;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated background */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(99, 102, 241, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(6, 182, 212, 0.06), transparent),
    radial-gradient(ellipse 50% 60% at 50% 80%, rgba(139, 92, 246, 0.05), transparent);
  pointer-events: none;
  z-index: 0;
}

a { color: var(--accent-secondary); text-decoration: none; }
a:hover { color: var(--accent-primary-hover); }

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===== Navigation ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(10, 14, 26, 0.75);
  border-bottom: 1px solid var(--border-glass);
  padding: 0 24px;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-brand .icon {
  font-size: 1.5rem;
  -webkit-text-fill-color: initial;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.navbar-nav a,
.navbar-nav button {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

.navbar-nav a:hover,
.navbar-nav button:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.navbar-nav .active {
  color: var(--accent-primary);
  background: rgba(99, 102, 241, 0.1);
}

/* ===== Hero Section ===== */
.hero {
  text-align: center;
  padding: 100px 0 60px;
  position: relative;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeUp 0.8s ease-out;
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  animation: fadeUp 0.8s ease-out 0.1s both;
}

/* Domain Checker */
.domain-checker {
  max-width: 600px;
  margin: 0 auto;
  animation: fadeUp 0.8s ease-out 0.2s both;
}

.domain-input-group {
  display: flex;
  align-items: stretch;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: border-color var(--transition-fast);
}

.domain-input-group:focus-within {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
}

.domain-input-group input {
  flex: 1;
  padding: 16px 20px;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-family: inherit;
  min-width: 0;
}

.domain-input-group input::placeholder {
  color: var(--text-muted);
}

.domain-suffix {
  display: flex;
  align-items: center;
  padding: 0 20px;
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 500;
  border-left: 1px solid var(--border-glass);
  white-space: nowrap;
}

.domain-check-result {
  margin-top: 12px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  display: none;
  animation: fadeIn 0.3s ease;
}

.domain-check-result.available {
  display: block;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.domain-check-result.unavailable {
  display: block;
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.domain-check-result.error {
  display: block;
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-glow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-glass);
}

.card-header h2 {
  font-size: 1.15rem;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 2px 10px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: var(--accent-gradient-hover);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.25);
  color: var(--danger-hover);
}

.btn-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
  background: rgba(16, 185, 129, 0.25);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: all var(--transition-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control::placeholder {
  color: var(--text-muted);
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2364748b'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 20px;
  padding-right: 36px;
  cursor: pointer;
}

select.form-control option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ===== Tables ===== */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-glass);
  white-space: nowrap;
}

tbody td {
  padding: 14px 16px;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  vertical-align: middle;
}

tbody tr {
  transition: background var(--transition-fast);
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.table-actions {
  display: flex;
  gap: 6px;
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

.badge-info {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-secondary);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-glass);
}

.modal-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border-glass);
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: rgba(99, 102, 241, 0.2);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.stat-card .stat-value {
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== Toasts ===== */
.toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  animation: slideInRight 0.3s ease-out;
  max-width: 360px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-md);
}

.toast-success {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.toast-error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.toast-info {
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-primary-hover);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

/* ===== Feature Cards ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 60px;
  padding-bottom: 60px;
}

.feature-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.2);
  box-shadow: var(--shadow-glow);
}

.feature-card .feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Page Header ===== */
.page-header {
  padding: 40px 0 30px;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===== Search Bar ===== */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.search-bar input {
  flex: 1;
  min-width: 200px;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
}

.empty-state p {
  font-size: 1rem;
  margin-bottom: 20px;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  padding: 10px 16px;
  text-align: center;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: none;
  font-family: inherit;
}

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

.tab.active {
  background: var(--accent-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.25rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

  .domain-input-group {
    flex-direction: column;
    border-radius: var(--radius-md);
  }

  .domain-suffix {
    border-left: none;
    border-top: 1px solid var(--border-glass);
    padding: 10px 20px;
    justify-content: center;
  }

  .navbar .container {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 0;
    gap: 8px;
  }

  .navbar-nav {
    flex-wrap: wrap;
    gap: 4px;
  }

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

  .features-grid {
    grid-template-columns: 1fr;
  }

  .search-bar {
    flex-direction: column;
  }

  .modal {
    max-width: 100%;
  }

  .table-actions {
    flex-direction: column;
  }
}

/* ===== Loading ===== */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-glass);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ===== scrollbar ===== */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===== Auth Toggle ===== */
.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-switch a {
  color: var(--accent-primary);
  cursor: pointer;
  font-weight: 500;
}

.auth-switch a:hover {
  color: var(--accent-primary-hover);
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg-primary: #eef2ff;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.9);
  --bg-card-hover: rgba(238, 242, 255, 0.95);
  --bg-glass: rgba(0, 0, 0, 0.04);
  --border-glass: rgba(99, 102, 241, 0.15);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;

  --shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.08);
  --shadow-md: 0 4px 16px rgba(99, 102, 241, 0.12);
  --shadow-lg: 0 8px 32px rgba(99, 102, 241, 0.16);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 80% 50% at 20% 40%, rgba(99, 102, 241, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 80% 20%, rgba(6, 182, 212, 0.04), transparent),
    radial-gradient(ellipse 50% 60% at 50% 80%, rgba(139, 92, 246, 0.04), transparent);
}

[data-theme="light"] .navbar {
  background: rgba(240, 244, 255, 0.85);
}

[data-theme="light"] .modal {
  background: #ffffff;
}

[data-theme="light"] select.form-control option {
  background: #ffffff;
  color: #0f172a;
}

[data-theme="light"] .form-control {
  background: rgba(0, 0, 0, 0.03);
}

/* ===== Theme Transition Overlay ===== */
.theme-overlay {
  position: fixed;
  inset: 0;
  z-index: 99999;
  pointer-events: none;
  background: #f0f4ff;
}

[data-theme="light"] .theme-overlay {
  background: #0a0e1a;
}

/* ===== Hide ===== */
.hidden { display: none !important; }

/* Footer */
.footer {
  text-align: center;
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border-glass);
  margin-top: 40px;
}