/* ==========================================================================
   Syntrace Design System
   Palette:
   - Canvas: Technical Graphite-Bone (#F3F4F6) with Deep Slate-Black (#090D16)
   - Terminal Surfaces: Midnight Charcoal (#0F172A) and Crisp Technical White (#FFFFFF)
   - Incident / Outage Accent: Signal Crimson (#E11D48) - ONLY for active disruptions
   - Remediated / Healthy Accent: Emerald (#059669) - ONLY for healthy/verified states
   - Warning Amber: (#D97706) - for degraded pods/warning bounds
   - Typography: Space Grotesk (Headings), Inter (Body), JetBrains Mono (Code/Telemetry)
   ========================================================================== */

:root {
  --canvas-bg: #F3F4F6;
  --canvas-subtle: #ECEEF2;
  --surface-white: #FFFFFF;
  --surface-card: #FFFFFF;
  --surface-terminal: #0F172A;
  --surface-terminal-subtle: #1E293B;

  --ink-primary: #090D16;
  --ink-secondary: #334155;
  --ink-muted: #64748B;
  --ink-faint: #94A3B8;

  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;
  --border-dark: #334155;

  /* Strict Semantic Accents */
  --accent-crimson: #E11D48;
  --accent-crimson-bg: #FFF1F2;
  --accent-crimson-border: #FECDD3;

  --accent-emerald: #059669;
  --accent-emerald-bg: #ECFDF5;
  --accent-emerald-border: #A7F3D0;

  --accent-amber: #D97706;
  --accent-amber-bg: #FFFBEB;
  --accent-amber-border: #FDE68A;

  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --radius-xs: 3px;
  --radius-sm: 5px;
  --radius-md: 7px;
  --radius-lg: 10px;

  --max-width: 1260px;
  --header-height: 58px;
}

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

html {
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-color: var(--canvas-bg);
  color: var(--ink-primary);
  font-family: var(--font-body);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--canvas-bg);
}

/* Tabular Numerals & Monospace */
.mono, code, pre, .tabular, [data-tabular] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.12s ease;
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-narrow {
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-header {
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-group {
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.22rem;
  letter-spacing: -0.03em;
  color: var(--ink-primary);
}

.brand-logo svg {
  width: 22px;
  height: 22px;
  color: var(--ink-primary);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: var(--canvas-subtle);
  border: 1px solid var(--border-light);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-secondary);
  transition: color 0.12s ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--ink-primary);
  font-weight: 600;
}

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

.mobile-toggle {
  display: none;
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* ==========================================================================
   Buttons & Status Pills (No trailing arrows)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.12s ease;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-sm {
  padding: 5px 11px;
  font-size: 0.78rem;
}

.btn-lg {
  padding: 11px 22px;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--ink-primary);
  color: #FFFFFF;
  border-color: var(--ink-primary);
}

.btn-primary:hover {
  background-color: #1E293B;
  border-color: #1E293B;
}

.btn-secondary {
  background-color: var(--surface-white);
  color: var(--ink-primary);
  border-color: var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--canvas-subtle);
  border-color: var(--ink-muted);
}

.btn-danger {
  background-color: var(--accent-crimson);
  color: #FFFFFF;
  border-color: var(--accent-crimson);
}

.btn-danger:hover {
  background-color: #BE123C;
}

.btn-success {
  background-color: var(--accent-emerald);
  color: #FFFFFF;
  border-color: var(--accent-emerald);
}

.btn-success:hover {
  background-color: #047857;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-secondary);
}

.btn-ghost:hover {
  color: var(--ink-primary);
  background: rgba(9, 13, 22, 0.05);
}

/* Status Badges */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
}

.status-crimson {
  background-color: var(--accent-crimson-bg);
  color: var(--accent-crimson);
  border-color: var(--accent-crimson-border);
}

.status-emerald {
  background-color: var(--accent-emerald-bg);
  color: var(--accent-emerald);
  border-color: var(--accent-emerald-border);
}

.status-amber {
  background-color: var(--accent-amber-bg);
  color: var(--accent-amber);
  border-color: var(--accent-amber-border);
}

.status-neutral {
  background-color: var(--canvas-subtle);
  color: var(--ink-secondary);
  border-color: var(--border-light);
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: currentColor;
  animation: pulse-kf 1.6s infinite;
}

@keyframes pulse-kf {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1); }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 68px 0 44px 0;
  background: var(--canvas-bg);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 380px;
  background: radial-gradient(ellipse at top, rgba(255, 255, 255, 0.95) 0%, rgba(243, 244, 246, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 960px;
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.hero-release-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
}

.hero-headline {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--ink-primary);
  margin-bottom: 18px;
}

.hero-subhead {
  font-size: 1.12rem;
  line-height: 1.68;
  color: var(--ink-secondary);
  max-width: 800px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.hero-metrics-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  gap: 20px;
}

.hero-metric-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-metric-val {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink-primary);
  line-height: 1.1;
}

.hero-metric-label {
  font-size: 0.76rem;
  color: var(--ink-muted);
  font-weight: 500;
}

@media (max-width: 900px) {
  .hero-headline {
    font-size: 2.35rem;
  }
  .hero-metrics-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 680px) {
  .hero-section {
    padding: 44px 0 32px 0;
  }
  .hero-headline {
    font-size: 1.95rem;
  }
  .hero-subhead {
    font-size: 0.98rem;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-metrics-bar {
    grid-template-columns: 1fr 1fr;
    padding: 14px;
  }
}

/* ==========================================================================
   Structured Content Sections
   ========================================================================== */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-light);
}

.section-alt {
  background-color: var(--surface-white);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 10px;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink-primary);
  margin-bottom: 14px;
  line-height: 1.2;
}

.section-summary {
  font-size: 1.02rem;
  color: var(--ink-secondary);
  max-width: 720px;
  margin-bottom: 36px;
  line-height: 1.6;
}

/* Crisp Structural Cards (No generic grey shadows) */
.tech-card {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.12s ease;
}

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

.tech-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.tech-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.tech-card-body {
  font-size: 0.88rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* Architecture Comparison Table */
.data-table-wrap {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
}

.data-table th {
  background: var(--canvas-subtle);
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border-light);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--ink-secondary);
  vertical-align: top;
  line-height: 1.5;
}

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

.data-table tr:hover td {
  background: #FAFCFE;
}

.td-highlight {
  background: rgba(236, 253, 245, 0.5);
  font-weight: 500;
  color: var(--ink-primary) !important;
}

/* Forms */
.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-primary);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  background: var(--surface-white);
  color: var(--ink-primary);
  font-size: 0.88rem;
  transition: border-color 0.12s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--ink-primary);
  box-shadow: 0 0 0 3px rgba(9, 13, 22, 0.08);
}

/* Accessibility Focus Visible */
.btn:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--ink-primary);
  outline-offset: 2px;
}

/* Micro-elevation on buttons */
.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Custom Range Sliders */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--border-medium);
  border-radius: 4px;
  outline: none;
  transition: background 0.15s ease;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink-primary);
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform 0.12s ease, background 0.12s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: #1E293B;
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink-primary);
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform 0.12s ease;
}

/* Code Block Wrapper & Copy Button */
.code-block-container {
  position: relative;
  background: #0B0F19;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 16px 0;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #070B14;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #94A3B8;
}

.code-copy-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #CBD5E1;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
}

.code-copy-btn.copied {
  background: rgba(16, 185, 129, 0.2);
  border-color: #10B981;
  color: #34D399;
}


/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--surface-white);
  border-top: 1px solid var(--border-light);
  padding: 48px 0 28px 0;
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--ink-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ink-primary);
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-links a:hover {
  color: var(--ink-primary);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--ink-muted);
}

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .main-nav { display: none; }
  .mobile-toggle { display: block; }
  .mobile-menu-open .main-nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--surface-white);
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
  }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}