/* Chess64 Admin Dashboard — Modern Dark Theme */

:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #111820;
  --bg-card: #151c25;
  --bg-card-hover: #1a2230;
  --bg-input: #1c2430;
  --border: #232d3b;
  --border-hover: #344054;
  --text-primary: #e8edf4;
  --text-secondary: #8b97a8;
  --text-muted: #5c6a7e;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.12);
  --warning: #eab308;
  --warning-glow: rgba(234, 179, 8, 0.12);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.12);
  --info: #3b82f6;
  --sidebar-width: 230px;
  --header-height: 0px;
  --radius: 10px;
  --radius-lg: 14px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
#app {
  min-height: 100vh;
}

/* ================= Sidebar ================= */
.sidebar {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  padding: 1.25rem 0;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-direction: column;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  z-index: 100;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  background: rgba(17, 24, 32, 0.92);
}

.sidebar-header {
  padding: 0 1.25rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: 0.6rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.env-badge {
  font-size: 0.6rem;
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.env-badge.local {
  background: var(--success-glow);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.25);
}

.env-badge.production {
  background: var(--warning-glow);
  color: var(--warning);
  border: 1px solid rgba(234, 179, 8, 0.25);
}

/* Hide local-only controls in production environment */
body.env-production [data-local-only] {
  display: none !important;
}

/* Data Source Toggle */
.source-toggle {
  padding: 0.5rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.source-toggle select {
  width: 100%;
  min-height: 36px;
  padding: 0.35rem 0.6rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  -webkit-transition: border-color var(--transition);
  transition: border-color var(--transition);
}

.source-toggle select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.nav-links {
  list-style: none;
  -webkit-flex: 1;
  flex: 1;
  padding: 0.75rem 0;
  overflow-y: auto;
}

.nav-links li a {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  -webkit-transition: all var(--transition);
  transition: all var(--transition);
  font-size: 0.88rem;
  font-weight: 500;
  min-height: 44px;
  border-left: 3px solid transparent;
}

.nav-links li a:hover {
  color: var(--text-primary);
  background: var(--accent-glow);
  border-left-color: rgba(59, 130, 246, 0.4);
}

.nav-links li a.active {
  color: var(--accent);
  background: var(--accent-glow);
  border-left-color: var(--accent);
}

.alert-badge {
  background: var(--danger);
  color: #fff;
  font-size: 0.65rem;
  padding: 0.15rem 0.45rem;
  border-radius: 10px;
  font-weight: 700;
  min-width: 18px;
  text-align: center;
  -webkit-animation: pulse-badge 2s ease infinite;
  animation: pulse-badge 2s ease infinite;
}

@-webkit-keyframes pulse-badge {
  0%, 100% { -webkit-transform: scale(1); transform: scale(1); }
  50% { -webkit-transform: scale(1.1); transform: scale(1.1); }
}

@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.sidebar-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid var(--border);
}

/* ================= Content ================= */
.content {
  margin-left: var(--sidebar-width);
  padding: 2rem;
  min-height: 100vh;
}

/* ================= Hamburger ================= */
.hamburger {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5rem;
  cursor: pointer;
  min-width: 44px;
  min-height: 44px;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-flex-direction: column;
  flex-direction: column;
  gap: 4px;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  -webkit-transition: var(--transition);
  transition: var(--transition);
  border-radius: 1px;
}

.backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 50;
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

/* ================= Cards ================= */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  -webkit-transition: border-color var(--transition), box-shadow var(--transition);
  transition: border-color var(--transition), box-shadow var(--transition);
}

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

.card-grid,
.metric-grid {
  display: -ms-grid;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  text-align: center;
  -webkit-transition: all var(--transition);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.metric-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--border);
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
}

.metric-card:hover {
  border-color: var(--border-hover);
  -webkit-transform: translateY(-1px);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.metric-card .value,
.metric-card .metric-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin-top: 0.5rem;
}

.metric-card .label,
.metric-card .metric-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.metric-card.status-ok::before,
.metric-card.status-healthy::before { background: var(--success); }
.metric-card.status-warning::before { background: var(--warning); }
.metric-card.status-critical::before,
.metric-card.status-danger::before { background: var(--danger); }

.metric-card.status-ok,
.metric-card.status-healthy { border-color: rgba(34, 197, 94, 0.25); }
.metric-card.status-warning { border-color: rgba(234, 179, 8, 0.25); }
.metric-card.status-critical,
.metric-card.status-danger { border-color: rgba(239, 68, 68, 0.25); }

/* ================= Chart Rows ================= */
.chart-row {
  display: -ms-grid;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* ================= Buttons ================= */
.btn {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  -webkit-transition: all var(--transition);
  transition: all var(--transition);
  min-height: 44px;
  min-width: 44px;
  gap: 0.4rem;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.btn:active {
  -webkit-transform: scale(0.98);
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 1px 3px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.btn-danger:hover {
  background: #dc2626;
  border-color: #dc2626;
  color: #fff;
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  min-height: 36px;
  border-radius: 8px;
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th,
.data-table td {
  padding: 0.7rem 0.9rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  position: -webkit-sticky;
  position: sticky;
  top: 0;
}

.data-table tr:hover {
  background: rgba(59, 130, 246, 0.04);
}

/* ================= Forms ================= */
input, textarea, select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  padding: 0.55rem 0.85rem;
  font-size: 0.9rem;
  min-height: 44px;
  width: 100%;
  -webkit-transition: border-color var(--transition), box-shadow var(--transition);
  transition: border-color var(--transition), box-shadow var(--transition);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ================= Login Page ================= */
.login-wrapper {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
  background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
}

.login-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
}

.login-box h1 {
  font-size: 1.4rem;
  margin-bottom: 1.75rem;
  text-align: center;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.login-box .form-group {
  margin-bottom: 1rem;
}

.login-box label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 600;
}

.login-box input {
  width: 100%;
  margin-bottom: 1rem;
}

.login-box form button[type="submit"] {
  width: 100%;
}

.login-box .error,
.login-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.5rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--danger-glow);
  border-radius: 8px;
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* ================= Chart Containers ================= */
.chart-container {
  position: relative;
  width: 100%;
  max-height: 300px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 1rem;
  border: 1px solid var(--border);
}

.chart-container h3 {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ================= Output/Log Panel ================= */
.output-panel {
  background: #080c12;
  color: #c5d0de;
  font-family: 'SF Mono', 'Fira Code', Menlo, Consolas, monospace;
  font-size: 0.78rem;
  padding: 1rem;
  border-radius: var(--radius);
  overflow: auto;
  max-height: 400px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-all;
  border: 1px solid var(--border);
}

/* ================= Section Headers ================= */
.section-header {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.section-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ================= Confirmation Dialog ================= */
.dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  -webkit-justify-content: center;
  justify-content: center;
  z-index: 300;
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.dialog {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  width: 90%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
  -webkit-animation: dialog-in 0.2s ease-out;
  animation: dialog-in 0.2s ease-out;
}

@-webkit-keyframes dialog-in {
  from { opacity: 0; -webkit-transform: scale(0.95) translateY(8px); }
  to { opacity: 1; -webkit-transform: scale(1) translateY(0); }
}

@keyframes dialog-in {
  from { opacity: 0; transform: scale(0.95) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.dialog h3 {
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.dialog p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.dialog .dialog-actions {
  display: -webkit-flex;
  display: flex;
  gap: 0.5rem;
  -webkit-justify-content: flex-end;
  justify-content: flex-end;
}

/* ================= Severity ================= */
.severity-critical { color: var(--danger); }
.severity-warning { color: var(--warning); }
.severity-info { color: var(--info); }

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-critical { background: var(--danger-glow); color: var(--danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-warning { background: var(--warning-glow); color: var(--warning); border: 1px solid rgba(234, 179, 8, 0.2); }
.badge-info { background: var(--accent-glow); color: var(--info); border: 1px solid rgba(59, 130, 246, 0.2); }
.badge-success { background: var(--success-glow); color: var(--success); border: 1px solid rgba(34, 197, 94, 0.2); }

/* ================= Severity Badge (Alert Cards) ================= */
.severity-badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.severity-badge.critical { background: var(--danger-glow); color: var(--danger); }
.severity-badge.warning { background: var(--warning-glow); color: var(--warning); }
.severity-badge.info { background: var(--accent-glow); color: var(--info); }

/* ================= Alert Cards ================= */
.alert-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 0.75rem;
  -webkit-transition: border-color var(--transition), box-shadow var(--transition);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.alert-item:hover {
  box-shadow: var(--shadow-sm);
}

.alert-item.severity-critical { border-left: 3px solid var(--danger); }
.alert-item.severity-warning { border-left: 3px solid var(--warning); }
.alert-item.severity-info { border-left: 3px solid var(--info); }

.alert-header {
  display: -webkit-flex;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.alert-rule {
  font-weight: 600;
  color: var(--text-primary);
}

.alert-time {
  margin-left: auto;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.alert-body {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.alert-suggestion {
  font-style: italic;
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 0.5rem 0.75rem;
  background: rgba(59, 130, 246, 0.05);
  border-radius: 8px;
  border-left: 2px solid var(--accent);
}

.alert-actions {
  display: -webkit-flex;
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

/* ================= Button Group ================= */
.btn-group {
  display: -webkit-flex;
  display: flex;
  gap: 0.5rem;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}

/* ================= Utilities ================= */
.text-muted {
  color: var(--text-muted);
}

/* ================= Connection Status ================= */
.connection-status {
  display: -webkit-inline-flex;
  display: inline-flex;
  -webkit-align-items: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  padding: 0.35rem 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-dot.connected {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.status-dot.disconnected { background: var(--danger); }
.status-dot.reconnecting {
  background: var(--warning);
  -webkit-animation: pulse 1.5s ease infinite;
  animation: pulse 1.5s ease infinite;
}

.status-text {
  color: var(--text-secondary);
  font-weight: 500;
}

@-webkit-keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* ================= Unreachable State ================= */
.unreachable {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
}

.unreachable .timestamp {
  font-size: 0.8rem;
  margin-top: 0.5rem;
}

/* ================= Page Titles ================= */
h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}

h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ================= Responsive: Tablet ================= */
@media (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

/* ================= Responsive: Phone ================= */
@media (max-width: 768px) {
  .sidebar {
    -webkit-transform: translateX(-100%);
    transform: translateX(-100%);
    -webkit-transition: -webkit-transform 0.3s ease;
    transition: transform 0.3s ease;
  }

  .sidebar.open {
    -webkit-transform: translateX(0);
    transform: translateX(0);
  }

  .content {
    margin-left: 0;
    padding: 3.5rem 1rem 1rem;
  }

  .hamburger {
    display: -webkit-flex;
    display: flex;
  }

  .backdrop.visible {
    display: block;
  }

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

  .dialog {
    width: 95%;
    max-width: none;
  }

  .table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .table-wrapper table {
    min-width: 500px;
  }

  .table-wrapper th {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    background: var(--bg-card);
    z-index: 1;
  }

  .chart-container {
    max-width: 100%;
    overflow: hidden;
  }
}

@media (max-width: 480px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

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

  .metric-card .value,
  .metric-card .metric-value {
    font-size: 1.4rem;
  }

  .chart-container {
    max-height: 200px;
  }

  .content {
    padding: 3.5rem 0.75rem 0.75rem;
  }

  .card-grid,
  .metric-grid,
  .alert-list {
    grid-template-columns: 1fr;
  }

  .dialog {
    width: calc(100% - 1.5rem);
    margin: 0.75rem;
    max-height: 90vh;
    overflow-y: auto;
  }

  .btn {
    min-height: 44px;
    min-width: 44px;
  }
}

@media (max-width: 320px) {
  .chart-container.collapsible {
    display: none;
  }

  .metric-card .metric-label {
    font-size: 0.7rem;
  }

  .metric-card .metric-value {
    font-size: 1.1rem;
  }
}