@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,700;1,9..40,400&display=swap');

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

:root {
  --bg:      #0A0A0A;
  --surface: #141414;
  --border:  #1F1F1F;
  --divider: #2A2A2A;
  --text-1:  #F5F5F5;
  --text-2:  #A3A3A3;
  --text-3:  #8C8C8C;
  --accent:  #F59E0B;
  --accent-dim: #92400E;
  --teal:    #14B8A6;
  --red:     #EF4444;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
  --font-sans: 'DM Sans', system-ui, sans-serif;
  --r: 6px;
  --r-lg: 12px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  background-image: radial-gradient(circle, #1F1F1F 1px, transparent 1px);
  background-size: 32px 32px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  color: var(--text-1);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 14px; }
.nav-links a:hover { color: var(--text-1); text-decoration: none; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  padding: 10px 22px; border-radius: var(--r);
  border: none; cursor: pointer; transition: all 0.15s;
  text-decoration: none;
}
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { background: #FBBF24; text-decoration: none; }
.btn-ghost { background: transparent; color: var(--text-2); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }

.hero { padding: 100px 0 72px; text-align: center; position: relative; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; color: var(--accent);
  letter-spacing: 0.1em; text-transform: uppercase;
  border: 1px solid var(--accent-dim); border-radius: 100px;
  padding: 4px 14px; margin-bottom: 28px;
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 700; letter-spacing: -0.04em;
  line-height: 1.08;
  background: linear-gradient(135deg, #F5F5F5 0%, #A3A3A3 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #FCD34D);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px; color: var(--text-2); max-width: 560px; margin: 0 auto 40px;
  line-height: 1.65;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-note { font-size: 13px; color: var(--text-3); margin-top: 20px; font-family: var(--font-mono); }

.card-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  padding: 0 0 80px;
}
@media (max-width: 720px) { .card-grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 32px; text-align: left; transition: border-color 0.15s;
}
.card:hover { border-color: var(--divider); }
.card-badge {
  display: inline-block; font-family: var(--font-mono); font-size: 11px;
  color: var(--text-3); border: 1px solid var(--border); border-radius: 100px;
  padding: 2px 10px; margin-bottom: 16px; letter-spacing: 0.05em; text-transform: uppercase;
}
.card h2 { font-size: 22px; margin-bottom: 10px; letter-spacing: -0.01em; }
.card h2 .dot { color: var(--accent); }
.card h2 .dot-teal { color: var(--teal); }
.card p { color: var(--text-2); font-size: 14.5px; margin-bottom: 20px; line-height: 1.6; }
.card a.btn { width: 100%; }

.section { padding: 40px 0 80px; }
.section h2 {
  font-size: 28px; text-align: center; margin-bottom: 48px; letter-spacing: -0.02em;
}
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 720px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px;
}
.step-num {
  font-family: var(--font-mono); color: var(--accent); font-size: 13px; margin-bottom: 10px;
}
.step h3 { font-size: 16px; margin-bottom: 8px; }
.step p { color: var(--text-2); font-size: 14px; line-height: 1.6; }

.heartbeat-wrap {
  max-width: 560px; margin: 56px auto 0; border: 1px solid var(--border);
  border-radius: var(--r-lg); background: var(--surface); padding: 24px;
  position: relative; overflow: hidden;
}
.heartbeat-label {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; text-align: left;
}
.heartbeat-beat {
  fill: none; stroke: var(--teal); stroke-width: 2.5;
  stroke-dasharray: 1000; stroke-dashoffset: 1000;
  animation: draw 2.6s linear infinite;
}
@keyframes draw { to { stroke-dashoffset: 0; } }

.og-card-mock {
  max-width: 560px; margin: 0 auto; border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden; background: var(--surface);
}
.og-card-mock .bar {
  display: flex; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border);
}
.og-card-mock .bar span { width: 9px; height: 9px; border-radius: 50%; background: var(--divider); }
.og-card-mock .art {
  aspect-ratio: 1200/630; background:
    linear-gradient(160deg, #141414 0%, #0A0A0A 60%),
    radial-gradient(circle at 15% 20%, rgba(245,158,11,0.14), transparent 45%);
  display: flex; flex-direction: column; justify-content: center; padding: 40px;
  font-family: var(--font-mono);
}
.og-card-mock .art .eyebrow2 { font-size: 11px; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; }
.og-card-mock .art h3 { font-size: 22px; color: var(--text-1); line-height: 1.3; max-width: 80%; }
.og-card-mock .art .domain { font-size: 11px; color: var(--text-3); margin-top: 16px; }
.og-card-mock canvas { display: block; width: 100%; height: auto; }

.demo-section { padding-top: 8px; scroll-margin-top: 80px; }
.demo-eyebrow {
  display: flex; align-items: center; gap: 8px; justify-content: center;
  font-family: var(--font-mono); font-size: 12px; color: var(--teal);
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 16px;
}
.demo-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--teal);
  animation: pulse 2s ease-in-out infinite;
}
.demo-title { text-align: center; margin-bottom: 40px; }
.demo-grid {
  display: grid; grid-template-columns: 320px 1fr; gap: 32px; align-items: start;
}
@media (max-width: 760px) { .demo-grid { grid-template-columns: 1fr; } }

.demo-controls {
  display: flex; flex-direction: column; gap: 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px;
}
.demo-field { display: flex; flex-direction: column; gap: 6px; }
.demo-field span {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.06em;
}
.demo-field input, .demo-field textarea, .demo-field select {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r);
  color: var(--text-1); font-family: var(--font-sans); font-size: 14.5px;
  padding: 9px 12px; resize: none; transition: border-color 0.15s;
}
.demo-field input:focus, .demo-field textarea:focus, .demo-field select:focus {
  outline: none; border-color: var(--accent);
}
.demo-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.demo-theme-toggle { display: flex; gap: 8px; margin-top: 4px; }
.theme-btn {
  flex: 1; font-family: var(--font-mono); font-size: 12px; color: var(--text-2);
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r);
  padding: 8px; cursor: pointer; transition: all 0.15s;
}
.theme-btn:hover { border-color: var(--divider); }
.theme-btn.active { color: #000; background: var(--accent); border-color: var(--accent); }

.demo-preview { display: flex; flex-direction: column; gap: 12px; }
.demo-note {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-3); text-align: center;
}

.fl-monitor {
  display: flex; flex-direction: column; gap: 20px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px;
}
.fl-monitor-top { display: flex; align-items: center; justify-content: space-between; }
.fl-status {
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  padding: 4px 12px; border-radius: 100px; letter-spacing: 0.02em;
}
.fl-status-up { color: var(--teal); background: rgba(20,184,166,0.12); border: 1px solid rgba(20,184,166,0.3); }
.fl-status-down { color: var(--red); background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.3); }
.fl-readout { font-family: var(--font-mono); font-size: 12px; color: var(--text-3); }

.fl-timeline-track {
  position: relative; height: 8px; margin: 28px 6px 30px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 100px;
  overflow: visible;
}
.fl-timeline-fill {
  position: absolute; top: -1px; left: -1px; height: 8px; border-radius: 100px;
  background: var(--teal); transition: width 0.15s linear, background 0.2s;
}
.fl-timeline-fill.down { background: var(--red); }
.fl-marker {
  position: absolute; top: -18px; bottom: -18px; width: 1px;
  background: var(--divider); transform: translateX(-50%);
}
.fl-marker span {
  position: absolute; bottom: -20px; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: 10px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.05em; white-space: nowrap;
}
.fl-marker-danger { background: rgba(239,68,68,0.5); }
.fl-marker-danger span { color: var(--red); }

.fl-log {
  display: flex; flex-direction: column; gap: 6px;
  max-height: 150px; overflow-y: auto;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r);
  padding: 12px 14px; font-family: var(--font-mono); font-size: 12px; line-height: 1.6;
}
.fl-log:empty::before { content: 'Waiting for first event…'; color: var(--text-3); }
.fl-log-entry { color: var(--text-2); }
.fl-log-entry.up { color: var(--teal); }
.fl-log-entry.down { color: var(--red); }
.fl-log-time { color: var(--text-3); margin-right: 8px; }

.footer {
  border-top: 1px solid var(--border); padding: 32px 0; text-align: center;
  color: var(--text-3); font-size: 13px; font-family: var(--font-mono);
}
.footer a { color: var(--text-3); }
.footer a:hover { color: var(--accent); }

/* Blog: index + article prose */
.blog-container { max-width: 680px; margin: 0 auto; padding: 0 24px; }
.blog-hero { padding: 72px 0 40px; }
.blog-eyebrow {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px;
}
.blog-hero h1 {
  font-size: clamp(30px, 5vw, 44px); font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.15; margin-bottom: 16px;
}
.blog-index-list { display: flex; flex-direction: column; gap: 4px; padding-bottom: 80px; }
.blog-index-item {
  display: block; padding: 24px 0; border-bottom: 1px solid var(--border);
  transition: opacity 0.15s;
}
.blog-index-item:hover { opacity: 0.8; text-decoration: none; }
.blog-index-item .blog-index-date {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.06em; display: block; margin-bottom: 8px;
}
.blog-index-item h2 {
  color: var(--text-1); font-size: 21px; font-weight: 700; letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.blog-index-item p { color: var(--text-2); font-size: 14.5px; line-height: 1.6; }

.blog-post-meta {
  font-family: var(--font-mono); font-size: 12px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 48px;
}
.blog-post-meta a { color: var(--text-3); }
.blog-post-meta a:hover { color: var(--accent); }
.blog-prose { padding-bottom: 96px; color: var(--text-2); font-size: 17px; line-height: 1.75; }
.blog-prose h2 {
  color: var(--text-1); font-size: 24px; font-weight: 700; letter-spacing: -0.01em;
  margin: 48px 0 18px;
}
.blog-prose h3 {
  color: var(--text-1); font-size: 18px; font-weight: 700; margin: 32px 0 12px;
}
.blog-prose p { margin-bottom: 20px; }
.blog-prose ul, .blog-prose ol { margin: 0 0 20px 22px; }
.blog-prose li { margin-bottom: 8px; }
.blog-prose strong { color: var(--text-1); }
.blog-prose code {
  font-family: var(--font-mono); font-size: 0.88em; color: var(--teal);
  background: var(--surface); border: 1px solid var(--border); border-radius: 4px;
  padding: 2px 6px;
}
.blog-prose pre {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 20px 24px; overflow-x: auto; margin: 0 0 24px;
}
.blog-prose pre code {
  background: none; border: none; padding: 0; color: var(--text-1); font-size: 13.5px;
  line-height: 1.7;
}
.blog-prose blockquote {
  border-left: 2px solid var(--accent); padding: 4px 0 4px 20px; margin: 0 0 24px;
  color: var(--text-2); font-style: italic;
}
.blog-cta {
  border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--surface);
  padding: 28px 32px; margin: 48px 0 0; text-align: center;
}
.blog-cta p { color: var(--text-2); margin-bottom: 16px; }