/* ── CSS Custom Properties ── */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card: #1e2130;
  --bg-input: #252836;
  --bg-hover: #2a2d3e;
  --border: #2e3148;
  --text-primary: #e4e6f0;
  --text-secondary: #8b8fa3;
  --text-muted: #5e6278;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
  --sidebar-width: 240px;
  --header-height: 56px;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.4);
  --transition: 150ms ease;
}

[data-theme="light"] {
  --bg-primary: #f5f6fa;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f0f1f5;
  --bg-hover: #e8e9f0;
  --border: #d1d5e0;
  --text-primary: #1a1d27;
  --text-secondary: #5e6278;
  --text-muted: #8b8fa3;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,0.1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
button { cursor: pointer; font: inherit; }
input, select, textarea { font: inherit; }

/* ── Layout ── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform var(--transition);
}

.app-main {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  height: var(--header-height);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.app-content {
  flex: 1;
  padding: 24px;
}

/* ── Sidebar ── */
.sidebar-logo {
  padding: 16px 20px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-nav { padding: 12px 8px; flex: 1; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
  margin-bottom: 2px;
}

.nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-item.active { background: var(--accent); color: #fff; }
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Common Components ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  font-weight: 500;
  transition: all var(--transition);
}
.btn:hover { background: var(--bg-hover); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { opacity: 0.9; }
.btn-sm { padding: 5px 10px; font-size: 0.85rem; }
.btn-icon { padding: 6px; border: none; background: transparent; color: var(--text-secondary); }
.btn-icon:hover { color: var(--text-primary); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--info); }
.badge-muted { background: var(--bg-input); color: var(--text-muted); }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

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

.card-title {
  font-size: 1rem;
  font-weight: 600;
}

/* ── Forms ── */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.form-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  transition: border-color var(--transition);
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
}
.form-input::placeholder { color: var(--text-muted); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 150ms ease;
}
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 150ms ease;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.modal-title { font-size: 1.15rem; font-weight: 600; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

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

/* ── Tables ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; padding: 10px 12px; color: var(--text-secondary); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; border-bottom: 1px solid var(--border); }
td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--bg-hover); }

/* ── Page header ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title { font-size: 1.5rem; font-weight: 700; }

/* ── Grid ── */
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

/* ── Stat cards row ── */
.stats-row {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  flex: 1;
  min-width: 150px;
}
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 4px; }
.stat-value { font-size: 1.5rem; font-weight: 700; }

/* ── Search / Filter bar ── */
.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.search-input {
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-primary);
  min-width: 200px;
}
.search-input:focus { outline: none; border-color: var(--accent); }

/* ── Toast notifications ── */
.toast-container {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toast {
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  animation: slideIn 200ms ease;
  max-width: 360px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info { border-left: 3px solid var(--info); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ── Pulse animation for live data ── */
@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.6; }
  100% { opacity: 1; }
}
.pulse { animation: pulse 0.6s ease; }

/* ── Status dot ── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 6px var(--danger); }
.status-dot.warning { background: var(--warning); box-shadow: 0 0 6px var(--warning); }
.status-dot.unknown { background: var(--text-muted); }

/* ── Progress bar ── */
.progress-bar {
  height: 6px;
  background: var(--bg-input);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* ── Chart container ── */
.chart-container { position: relative; }

/* ── Time range selector ── */
.time-range {
  display: flex;
  gap: 4px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 2px;
}
.time-range button {
  padding: 4px 10px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
}
.time-range button.active {
  background: var(--accent);
  color: #fff;
}

/* ── Login page ── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg-primary);
}
.login-card {
  width: 100%;
  max-width: 400px;
  padding: 40px;
}
.login-title {
  text-align: center;
  margin-bottom: 8px;
  font-size: 1.5rem;
  font-weight: 700;
}
.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}
.empty-state h3 { margin-bottom: 8px; color: var(--text-primary); }

/* ── Domain Grid View ── */
.domain-grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 8px;
  position: relative;
}

.domain-grid-cell {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
}
.domain-grid-cell:hover { background: var(--bg-hover); }

.domain-grid-cell .domain-text {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: monospace;
  font-weight: 500;
}

.domain-grid-cell .eye-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.domain-grid-cell .eye-toggle:hover { color: var(--text-primary); }

/* Ruler */
.domain-ruler {
  position: sticky;
  top: var(--header-height);
  z-index: 10;
  background: var(--accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  box-shadow: var(--shadow);
  cursor: grab;
}
.domain-ruler button {
  background: rgba(255,255,255,0.2);
  border: none;
  color: #fff;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.75rem;
}
.domain-ruler button:hover { background: rgba(255,255,255,0.3); }

/* View toggle buttons */
.view-toggle {
  display: flex;
  gap: 2px;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 2px;
}
.view-toggle button {
  padding: 5px 8px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
}
.view-toggle button.active {
  background: var(--accent);
  color: #fff;
}

@media (max-width: 768px) {
  .domain-grid-view { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 6px; }
  .domain-grid-cell { padding: 8px 10px; font-size: 0.8rem; }
}

/* ── Sidebar collapse (all screens) ── */
.sidebar-toggle {
  display: block;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 8px;
  line-height: 1;
  font-size: 1.4rem;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
}

/* Desktop collapsed state */
.app-sidebar.collapsed {
  transform: translateX(-100%);
}
.app-sidebar.collapsed ~ .app-main,
.app-main.sidebar-collapsed {
  margin-left: 0;
}

/* ── Theme toggle ── */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
}
.theme-toggle:hover { color: var(--text-primary); }

/* ── Responsive: tablet ── */
@media (max-width: 1024px) {
  .stats-row { gap: 10px; }
  .stat-card { min-width: 120px; padding: 12px 14px; }
  .stat-value { font-size: 1.25rem; }
  .app-content { padding: 16px; }
  .page-header { gap: 8px; }
}

/* ── Responsive: mobile ── */
@media (max-width: 768px) {
  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }
  .app-sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  /* On mobile, collapsed class is not used — only open/close */
  .app-sidebar.collapsed { transform: translateX(-100%); }
  .app-sidebar.collapsed.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }

  .app-main { margin-left: 0 !important; }
  .app-content { padding: 12px; }
  .app-header { padding: 0 12px; }

  .page-header { flex-direction: column; align-items: flex-start; }
  .page-title { font-size: 1.25rem; }

  .toolbar { width: 100%; }
  .search-input { min-width: 0; flex: 1; }

  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }

  .stats-row { flex-direction: column; gap: 8px; }
  .stat-card { min-width: 0; padding: 12px; }
  .stat-value { font-size: 1.15rem; }

  .card { padding: 14px; }
  .card-header { flex-direction: column; align-items: flex-start; gap: 8px; }

  .time-range { flex-wrap: wrap; }

  th, td { padding: 8px 6px; font-size: 0.8rem; }

  .modal { width: 95%; padding: 16px; }
  .modal-title { font-size: 1rem; }

  .toast-container { left: 12px; right: 12px; }
  .toast { max-width: 100%; }

  .login-card { padding: 24px 16px; }
}

/* ── Responsive: small mobile ── */
@media (max-width: 480px) {
  html { font-size: 13px; }
  .app-content { padding: 8px; }
  .page-title { font-size: 1.1rem; }
  .btn { padding: 6px 10px; font-size: 0.85rem; }
  .btn-sm { padding: 4px 8px; font-size: 0.8rem; }
}