:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-alt: #1c2128;
  --border: #30363d;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --fg-dim: #484f58;
  --green: #00e5a0;
  --green-dim: rgba(0, 229, 160, 0.15);
  --amber: #f0b429;
  --amber-dim: rgba(240, 180, 41, 0.15);
  --red: #f85149;
  --red-dim: rgba(248, 81, 73, 0.15);
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-logo {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--green);
}
.nav-tagline {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.05em;
}

/* Hero */
.hero {
  padding: 80px 32px 64px;
  max-width: 1100px;
  margin: 0 auto;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
}
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.green { background: var(--green); box-shadow: 0 0 6px var(--green); }
.eyebrow-text {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}
.hero-title {
  font-family: var(--mono);
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--fg);
}
.hero-subtitle {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 440px;
  margin-bottom: 28px;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-badge {
  font-family: var(--mono);
  font-size: 11px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

/* Terminal */
.terminal-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.terminal-bar {
  background: var(--surface-alt);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 1px solid var(--border);
}
.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.terminal-dot.red { background: #ff5f56; }
.terminal-dot.amber { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }
.terminal-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-dim);
  margin-left: 8px;
}
.terminal-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.log-line {
  font-family: var(--mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 0;
}
.log-time { color: var(--fg-dim); flex-shrink: 0; }
.log-ok { color: var(--green); font-weight: 600; flex-shrink: 0; min-width: 70px; }
.log-warn { color: var(--amber); font-weight: 600; flex-shrink: 0; min-width: 70px; }
.log-action { color: var(--amber); font-weight: 500; }
.log-info { color: var(--fg-muted); }
.log-dim { color: var(--fg-dim); }
.log-latency { color: var(--fg-muted); }
.log-latency.warn { color: var(--amber); }

/* Status panel */
.status-section {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 32px;
  background: var(--surface);
}
.status-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.status-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  text-transform: uppercase;
}
.status-count {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--fg-dim);
}
.status-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.status-card {
  background: var(--surface-alt);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.status-card.healthy { border-left: 3px solid var(--green); }
.status-icon { color: var(--fg-muted); flex-shrink: 0; }
.status-info { display: flex; flex-direction: column; gap: 4px; }
.status-count-big {
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 600;
  color: var(--fg);
  line-height: 1;
}
.status-desc {
  font-size: 12px;
  color: var(--fg-muted);
}

/* How it works */
.how-section {
  padding: 80px 32px;
  max-width: 1100px;
  margin: 0 auto;
}
.section-title {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-bottom: 48px;
}
.how-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.how-step { display: flex; flex-direction: column; gap: 12px; }
.step-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--green);
  letter-spacing: 0.08em;
}
.step-title {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--fg);
}
.step-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* Failure modes */
.failure-section {
  padding: 0 32px 80px;
  max-width: 1100px;
  margin: 0 auto;
}
.failure-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.failure-card {
  background: var(--bg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background 0.15s;
}
.failure-card:hover { background: var(--surface); }
.failure-icon { color: var(--fg-muted); }
.failure-title {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg);
}
.failure-desc {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.65;
}

/* Closing */
.closing-section {
  padding: 80px 32px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.closing-inner {
  max-width: 1100px;
  margin: 0 auto;
}
.closing-statement {
  font-family: var(--mono);
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 400;
  color: var(--fg-muted);
  line-height: 1.5;
  max-width: 700px;
  letter-spacing: -0.01em;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 32px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-brand {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: 0.08em;
}
.footer-tagline {
  font-size: 13px;
  color: var(--fg-dim);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .how-grid { grid-template-columns: repeat(2, 1fr); }
  .status-grid { grid-template-columns: repeat(2, 1fr); }
  .failure-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .hero { padding: 48px 20px 40px; }
  .how-section { padding: 56px 20px; }
  .failure-section { padding: 0 20px 56px; }
  .status-section { padding: 40px 20px; }
  .closing-section { padding: 56px 20px; }
  .how-grid { grid-template-columns: 1fr; }
  .status-grid { grid-template-columns: 1fr; }
  .nav-inner { padding: 14px 20px; }
}