/* ============================================================
   Vexion Command Center — Design System
   Reference: Vercel / Linear dark theme
   ============================================================ */

/* --- Design Tokens --- */
:root {
  --bg-0: #08090a;
  --bg-1: #0f1117;
  --bg-2: #161922;
  --bg-3: #1c2030;
  --bg-4: #252a3a;
  --border-0: #16191f;
  --border-1: #1e2231;
  --border-2: #2a3040;
  --text-0: #f0f2f5;
  --text-1: #b4b9c4;
  --text-2: #6e7484;
  --text-3: #454b5c;
  --accent: #6366f1;
  --accent-glow: rgba(99,102,241,0.15);
  --accent-hover: #818cf8;
  --green: #10b981;
  --green-dim: rgba(16,185,129,0.12);
  --green-text: #6ee7b7;
  --yellow: #f59e0b;
  --yellow-dim: rgba(245,158,11,0.12);
  --yellow-text: #fcd34d;
  --red: #ef4444;
  --red-dim: rgba(239,68,68,0.12);
  --red-text: #fca5a5;
  --blue: #3b82f6;
  --blue-dim: rgba(59,130,246,0.12);
  --blue-text: #93c5fd;
  --radius: 10px;
  --radius-lg: 14px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --transition: 150ms ease;
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-0) !important;
  color: var(--text-0) !important;
  min-height: 100vh;
  line-height: 1.5;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* --- Login Screen --- */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--bg-0);
  background-image:
    radial-gradient(ellipse 50% 60% at 50% 0%, var(--accent-glow), transparent);
}

.login-card {
  width: 100%;
  max-width: 380px;
  padding: 2.5rem;
  background: var(--bg-1);
  border: 1px solid var(--border-1);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 2rem;
}

.login-logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border-radius: 8px;
  font-size: 1.25rem;
}

.login-logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-0);
}

.login-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 0.5rem;
}

.login-input {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  padding: 0.8125rem 1rem;
  font-size: 1.5rem;
  font-family: var(--font-mono);
  text-align: center;
  letter-spacing: 0.3em;
  color: var(--text-0);
  outline: none;
  transition: border-color var(--transition);
}

.login-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.login-input::placeholder { color: var(--text-3); letter-spacing: 0.3em; }

.login-btn {
  width: 100%;
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background var(--transition), transform 80ms ease;
}

.login-btn:hover { background: var(--accent-hover); }
.login-btn:active { transform: scale(0.98); }

.login-error {
  margin-top: 0.75rem;
  padding: 0.5rem;
  font-size: 0.8125rem;
  text-align: center;
  color: var(--red-text);
  background: var(--red-dim);
  border-radius: 6px;
}

/* --- Layout: Sidebar --- */
#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  width: 224px;
  background: var(--bg-1);
  border-right: 1px solid var(--border-0);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform 200ms ease;
}

.sidebar-header {
  padding: 1.25rem 1rem;
  border-bottom: 1px solid var(--border-0);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-logo-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  border-radius: 7px;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.sidebar-logo-text {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-0);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.5rem 0;
}

.sidebar-footer {
  padding: 0.875rem 1rem;
  border-top: 1px solid var(--border-0);
}

.connection-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-2);
}

.ws-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--red);
  transition: background var(--transition);
}

.ws-dot.connected {
  background: var(--green);
  box-shadow: 0 0 8px rgba(16,185,129,0.4);
}

/* --- Navigation Items --- */
.nav-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.5625rem 1rem;
  margin: 1px 0;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  border-left: 3px solid transparent;
  text-align: left;
}

.nav-btn:hover {
  color: var(--text-1);
  background: var(--bg-2);
}

.nav-btn.nav-active {
  color: var(--text-0);
  background: var(--bg-2);
  border-left-color: var(--accent);
}

.nav-btn .nav-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition);
}

.nav-btn:hover .nav-icon,
.nav-btn.nav-active .nav-icon { opacity: 1; }

.nav-btn .nav-label { line-height: 1; }

/* --- Mobile Header --- */
#mobile-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3.5rem;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-0);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  z-index: 50;
}

.mobile-brand {
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.03em;
  margin-left: 0.75rem;
}

.menu-btn {
  padding: 0.375rem;
  background: transparent;
  border: 1px solid var(--border-1);
  border-radius: 6px;
  color: var(--text-1);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-btn:hover {
  background: var(--bg-2);
  border-color: var(--border-2);
}

/* --- Main Content --- */
#content {
  margin-left: 224px;
  padding: 1.5rem 2rem;
  min-height: 100vh;
}

/* --- Panel Cards --- */
.panel-card {
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  padding: 1.125rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.panel-card:hover {
  border-color: var(--border-2);
}

.panel-card.clickable {
  cursor: pointer;
}

.panel-card.clickable:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

/* --- Section Headers --- */
.section-title {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-0);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.1875rem 0.5rem;
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  font-family: var(--font);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-green { background: var(--green-dim); color: var(--green-text); }
.badge-yellow { background: var(--yellow-dim); color: var(--yellow-text); }
.badge-red { background: var(--red-dim); color: var(--red-text); }
.badge-gray { background: rgba(100,116,139,0.12); color: #94a3b8; }
.badge-blue { background: var(--blue-dim); color: var(--blue-text); }

/* --- Metric Cards (System) --- */
.metric-card {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.metric-label {
  font-size: 0.8125rem;
  color: var(--text-2);
  margin-top: 0.125rem;
}

/* --- Gauges (SVG Rings) --- */
.gauge-container {
  position: relative;
  width: 110px;
  height: 110px;
}

.gauge-bg {
  fill: none;
  stroke: var(--bg-3);
  stroke-width: 7;
}

.gauge-ring {
  fill: none;
  stroke-width: 7;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: center;
  transition: stroke-dashoffset 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gauge-green { stroke: var(--green); filter: drop-shadow(0 0 4px rgba(16,185,129,0.3)); }
.gauge-yellow { stroke: var(--yellow); filter: drop-shadow(0 0 4px rgba(245,158,11,0.3)); }
.gauge-red { stroke: var(--red); filter: drop-shadow(0 0 4px rgba(239,68,68,0.3)); }

.gauge-value {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

/* --- Service Status --- */
.service-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.service-up {
  background: var(--green);
  box-shadow: 0 0 6px rgba(16,185,129,0.4);
}

.service-down {
  background: var(--red);
  box-shadow: 0 0 6px rgba(239,68,68,0.4);
}

/* --- Progress Bars --- */
.progress-track {
  width: 100%;
  height: 6px;
  background: var(--bg-3);
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-fill.fill-green { background: var(--green); }
.progress-fill.fill-yellow { background: var(--yellow); }
.progress-fill.fill-red { background: var(--red); }

/* --- Tables --- */
.data-table {
  width: 100%;
  font-size: 0.8125rem;
  border-collapse: collapse;
}

.data-table thead th {
  text-align: left;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border-1);
}

.data-table tbody td {
  padding: 0.75rem 0.75rem;
  border-bottom: 1px solid var(--border-0);
  color: var(--text-1);
}

.data-table tbody tr {
  transition: background var(--transition);
}

.data-table tbody tr:hover {
  background: var(--bg-2);
}

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

/* --- Forms & Inputs --- */
.search-input {
  flex: 1;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  font-family: var(--font);
  color: var(--text-0);
  outline: none;
  transition: border-color var(--transition);
}

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-input::placeholder { color: var(--text-3); }

.btn-primary {
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background var(--transition);
}

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

/* --- Pending / Alert Banners --- */
.alert-banner {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  margin-bottom: 1rem;
}

.alert-banner.alert-warning {
  background: var(--yellow-dim);
  border: 1px solid rgba(245,158,11,0.2);
  color: var(--yellow-text);
}

.alert-banner.alert-success {
  background: var(--green-dim);
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--green-text);
}

/* --- Skeleton Loader --- */
.skeleton {
  background: linear-gradient(90deg, var(--bg-2) 25%, var(--bg-3) 50%, var(--bg-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --- Fade-In Animation --- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 200ms ease-out;
}

/* --- Filter Buttons --- */
.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--border-1);
  border-radius: 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  font-family: var(--font);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover {
  border-color: var(--border-2);
  color: var(--text-1);
  background: var(--bg-3);
}

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

/* --- Timestamp & Mono text --- */
.ts { font-family: var(--font-mono); font-size: 0.6875rem; color: var(--text-3); }
.mono { font-family: var(--font-mono); }

/* --- Sidebar Overlay (Mobile) --- */
#sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(2px);
  z-index: 30;
}

/* --- Responsive --- */
@media (max-width: 1023px) {
  #sidebar {
    transform: translateX(-100%);
  }

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

  #content {
    margin-left: 0;
    padding: 1rem;
    padding-top: 4.5rem;
  }
}

@media (min-width: 1024px) {
  #mobile-header { display: none !important; }
  #sidebar-overlay { display: none !important; }
}

@media (max-width: 768px) {
  .metric-grid { grid-template-columns: 1fr !important; }
}

/* --- Tailwind Color Overrides for Dark Theme --- */
.text-gray-300 { color: var(--text-1); }
.text-gray-400 { color: var(--text-2); }
.text-gray-500 { color: var(--text-3); }
.text-gray-200 { color: var(--text-0); }
.bg-gray-800 { background: var(--bg-1); }
.bg-gray-700 { background: var(--bg-3); }
.border-gray-700 { border-color: var(--border-0); }
.border-gray-800 { border-color: var(--border-0); }
.border-gray-600 { border-color: var(--border-1); }
.hover\:bg-gray-700:hover { background: var(--bg-3); }
.hover\:bg-gray-800:hover { background: var(--bg-2); }
.bg-yellow-900\/30 { background: var(--yellow-dim); }
.border-yellow-700 { border-color: rgba(245,158,11,0.2); }
.text-yellow-400 { color: var(--yellow-text); }
.text-yellow-200 { color: var(--yellow-text); }
.bg-green-900\/20 { background: var(--green-dim); }
.border-green-800 { border-color: rgba(16,185,129,0.2); }
.text-green-400 { color: var(--green-text); }
.text-red-400 { color: var(--red-text); }
.bg-blue-600 { background: var(--accent); }
.hover\:bg-blue-700:hover { background: var(--accent-hover); }
.focus\:border-blue-500:focus { border-color: var(--accent); }