:root {
  --font-display: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', ui-monospace, Consolas, monospace;

  --bg: #ffffff;
  --bg-alt: #fafafa;
  --surface: #ffffff;
  --surface-2: #f4f4f4;
  --text: #111;
  --text-2: #333;
  --text-3: #666;
  --text-4: #888;
  --border: rgba(0,0,0,0.08);
  --border-strong: #e5e5e5;
  --border-bright: #d4d4d4;
  --logo-filter: none;

  --accent: #FF7045;
  --accent-glow: rgba(255,112,69,0.14);
  --container: 1200px;
  --narrow: 720px;
  --radius: 6px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-alt: #111;
  --surface: #111;
  --surface-2: #1a1a1a;
  --text: #f5f5f5;
  --text-2: #cccccc;
  --text-3: #999;
  --text-4: #777;
  --border: rgba(255,255,255,0.08);
  --border-strong: #2a2a2a;
  --border-bright: #3a3a3a;
  --accent: #FF7045;
  --accent-glow: rgba(255,112,69,0.18);
  --logo-filter: invert(1);
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-alt: #fafafa;
  --surface: #ffffff;
  --surface-2: #f4f4f4;
  --text: #111;
  --text-2: #333;
  --text-3: #666;
  --text-4: #888;
  --border: rgba(0,0,0,0.08);
  --border-strong: #e5e5e5;
  --border-bright: #d4d4d4;
  --accent: #FF7045;
  --accent-glow: rgba(255,112,69,0.14);
  --logo-filter: none;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  transition: background 0.2s ease, color 0.2s ease;
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container.narrow { max-width: var(--narrow); }

/* Theme toggle */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 200;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-bright);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1;
  transition: background 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.theme-toggle:hover { background: var(--surface-2); border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-glow); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
}

.brand { display: inline-flex; align-items: center; }

.brand-logo {
  height: 44px;
  width: auto;
  display: block;
}

[data-theme="light"] .brand-logo-dark { display: none; }
[data-theme="dark"]  .brand-logo-light { display: none; }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.nav-cta:hover {
  border-color: var(--text);
  background: var(--text);
  color: var(--bg);
}

/* Hero */
.hero { padding: var(--space-12) 0 var(--space-16); }

.hero-text, .hero-yaml {
  animation: fadeUp 0.7s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}
.hero-yaml { animation-delay: 0.12s; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-text, .hero-yaml { animation: none; }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--space-8);
  align-items: center;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin-bottom: var(--space-4);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.6vw, 76px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-3);
  color: var(--text);
}

.lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--text-2);
  max-width: 540px;
  margin-bottom: var(--space-6);
}

.hero-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--text);
  transition: background 0.15s ease, transform 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  cursor: pointer;
}

.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { transform: translateY(-1px); }

.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--text); }

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
  margin-top: var(--space-4);
}

.btn-large { font-size: 17px; padding: 16px 28px; }

/* YAML panel */
.hero-yaml {
  background: var(--bg-alt);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02), 0 12px 40px -12px rgba(0,0,0,0.08);
}

.yaml-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.yaml-tag {
  background: var(--text);
  color: var(--bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
}

.yaml-body {
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.y-c { color: var(--text-3); }
.y-v { color: var(--text); }
.y-id { color: var(--accent); font-weight: 500; }

.y-typing {
  display: inline-block;
  overflow: hidden;
  white-space: nowrap;
  width: 35ch;
  vertical-align: bottom;
  animation: typeLoop 3.6s steps(35, end) 0.4s infinite backwards;
}
@keyframes typeLoop {
  0%   { width: 0; }
  44%  { width: 35ch; }
  100% { width: 35ch; }
}
@media (prefers-reduced-motion: reduce) {
  .y-typing { animation: none; width: auto; }
}

.cursor {
  display: inline-block;
  width: 0.55ch;
  height: 1em;
  background: var(--accent);
  vertical-align: -2px;
  margin-left: 2px;
  animation: blink 1.05s steps(2, jump-none) infinite;
}
@keyframes blink {
  50% { opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; opacity: 0.85; }
}

/* Sections */
section { padding: var(--space-12) 0; border-top: 1px solid var(--border); }
section.hero { border-top: none; }

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-3);
  margin-bottom: var(--space-4);
}

.section-label .num {
  color: var(--accent);
  font-weight: 600;
  margin-right: 6px;
}

/* Pain */
.pain-body {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.5;
  color: var(--text-2);
  margin-bottom: var(--space-3);
  letter-spacing: -0.005em;
}

.pain-body.strong { color: var(--text); font-weight: 500; }

/* How */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.how-step {
  border-top: 1px solid var(--border-strong);
  padding-top: var(--space-3);
}

.step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.step-body { font-size: 16px; line-height: 1.55; color: var(--text-2); }

.step-body code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Wedge */
.wedge-card {
  border: 1px solid var(--text);
  border-radius: 12px;
  padding: var(--space-6);
  background: var(--surface);
}

.wedge-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: var(--space-4);
}

.wedge-foot {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.wedge-list { list-style: none; margin: 0; padding: 0; }

.wedge-list li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}

.wedge-list li:last-child { border-bottom: none; }

.when {
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  font-weight: 500;
  padding-top: 2px;
}

.what { font-size: 16px; color: var(--text-2); line-height: 1.55; }

/* Founders */
.founders-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.founder {
  border-top: 1px solid var(--border-strong);
  padding-top: var(--space-3);
}

.founder-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
  color: var(--text);
}

.founder-role {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: var(--space-2);
}

.founder-bio { font-size: 15px; line-height: 1.55; color: var(--text-2); }

/* Final CTA */
.final-cta { padding: var(--space-16) 0; }

.final-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(36px, 4.5vw, 60px);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin-bottom: var(--space-3);
  color: var(--text);
}

.cta-sub {
  font-size: 18px;
  color: var(--text-2);
  margin-bottom: var(--space-6);
  max-width: 540px;
}

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: var(--space-4) 0; }

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  flex-wrap: wrap;
  gap: var(--space-2);
}

::selection { background: var(--text); color: var(--bg); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .how-grid, .founders-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  h1 { font-size: 44px; }
  .pain-body { font-size: 19px; }
  section { padding: var(--space-8) 0; }
  .hero { padding: var(--space-8) 0 var(--space-8); }
  .theme-toggle { top: 12px; right: 12px; }
}