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

:root {
  --bg: #0f172a;
  --bg-card: #1e293b;
  --bg-hover: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --border: #334155;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

/* Login */
.login-container {
  max-width: 360px;
  margin: 100px auto;
  padding: 40px;
  background: var(--bg-card);
  border-radius: 12px;
  text-align: center;
}

.login-container h1 {
  margin-bottom: 30px;
  font-size: 24px;
}

#login-form input {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
}

#login-form input:focus {
  outline: none;
  border-color: var(--primary);
}

#login-form button {
  width: 100%;
  padding: 12px;
  background: var(--primary);
  border: none;
  border-radius: 8px;
  color: white;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

#login-form button:hover {
  background: var(--primary-hover);
}

.error {
  color: var(--danger);
  margin-top: 16px;
  font-size: 14px;
}

/* Navigation */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
}

.nav-tabs {
  display: flex;
  gap: 4px;
}

.nav-tab {
  padding: 8px 16px;
  background: transparent;
  border: none;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.nav-tab:hover {
  color: var(--text);
  background: var(--bg-hover);
}

.nav-tab.active {
  color: var(--text);
  background: var(--bg);
}

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

#analytics-controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

select {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
}

select:focus {
  outline: none;
  border-color: var(--primary);
}

button {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

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

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

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

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

/* Main Content */
main {
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
}

/* 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);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.stat-card h3 {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card p {
  font-size: 28px;
  font-weight: 700;
}

/* Charts Grid */
.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.chart-container {
  background: var(--bg-card);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.chart-container.wide {
  grid-column: 1 / -1;
}

.chart-container h3 {
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.chart-container canvas {
  max-height: 300px;
}

/* Tables Grid */
.tables-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.table-container {
  background: var(--bg-card);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.table-container h3 {
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--text-muted);
}

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

th,
td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

td {
  font-size: 14px;
}

td:last-child {
  text-align: right;
  font-weight: 600;
}

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

/* Message */
.message {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

/* Page Header */
.page-header {
  margin-bottom: 24px;
}

.page-header h2 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.text-muted {
  color: var(--text-muted);
  font-size: 14px;
}

/* Sites Table */
.sites-table-container {
  background: var(--bg-card);
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
}

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

.sites-table th {
  text-align: left;
  padding: 14px 16px;
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.sites-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.sites-table tbody tr {
  cursor: pointer;
  transition: background 0.15s;
}

.sites-table tbody tr:hover {
  background: var(--bg-hover);
}

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

.site-name-cell {
  font-weight: 600;
}

.site-domain-cell {
  color: var(--text-muted);
  font-family: monospace;
  font-size: 13px;
}

.stat-cell {
  font-weight: 600;
  color: var(--primary);
}

.date-cell {
  color: var(--text-muted);
  font-size: 13px;
}

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

.btn-view {
  padding: 6px 14px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-view:hover {
  background: var(--primary-hover);
}

.btn-small {
  padding: 6px 12px;
  font-size: 12px;
  margin-left: 8px;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-content {
  background: var(--bg-card);
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
}

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

.modal-header h2 {
  font-size: 18px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 24px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
}

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

.modal-body {
  padding: 20px;
}

.modal-body h3 {
  font-size: 14px;
  margin-bottom: 12px;
  color: var(--text-muted);
}

#add-site-form {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

#add-site-form input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}

#add-site-form input:focus {
  outline: none;
  border-color: var(--primary);
}

#add-site-form button {
  width: 100%;
  padding: 10px;
  background: var(--primary);
  color: white;
}

#add-site-form button:hover {
  background: var(--primary-hover);
}

/* Site Item */
.site-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
  margin-bottom: 8px;
}

.site-info {
  flex: 1;
}

.site-name {
  font-weight: 600;
  margin-bottom: 4px;
}

.site-domain {
  font-size: 12px;
  color: var(--text-muted);
}

.site-ips {
  font-size: 11px;
  color: var(--success);
  margin-top: 4px;
}

.site-actions button {
  padding: 6px 12px;
  font-size: 12px;
}

/* Loading Spinner */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  margin: -12px 0 0 -12px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: inherit;
}

/* Auto-refresh indicator */
.refresh-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-muted);
}

.refresh-indicator.active {
  color: var(--success);
  border-color: var(--success);
}

.refresh-indicator .dot {
  width: 6px;
  height: 6px;
  background: var(--text-muted);
  border-radius: 50%;
}

.refresh-indicator.active .dot {
  background: var(--success);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

/* Responsive */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 16px;
  }

  .nav-left {
    flex-direction: column;
    gap: 12px;
  }

  .nav-actions {
    flex-wrap: wrap;
    justify-content: center;
  }

  #analytics-controls {
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .chart-container.wide {
    grid-column: 1;
  }

  .sites-table-container {
    overflow-x: auto;
  }

  .sites-table {
    min-width: 600px;
  }
}