/* vibe-flow landing — no frameworks */

:root {
  --bg: #0b0d14;
  --bg2: #0f1422;
  --card: rgba(255,255,255,0.06);
  --card2: rgba(255,255,255,0.08);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.68);
  --faint: rgba(255,255,255,0.42);
  --border: rgba(255,255,255,0.12);
  --accent: #6366f1; /* seamColor */
  --accent2: #22c55e;
  --warn: #f59e0b;
  --danger: #ef4444;
  --shadow: 0 20px 60px rgba(0,0,0,0.45);
  --radius: 16px;
  --radius2: 20px;
  --max: 1100px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 10% 0%, rgba(99,102,241,0.18), transparent 60%),
              radial-gradient(900px 500px at 90% 10%, rgba(34,197,94,0.10), transparent 55%),
              linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
}

a { color: inherit; }
code, pre { font-family: var(--mono); }

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: #000;
  color: #fff;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  z-index: 9999;
}
.skip-link:focus { left: 12px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(11,13,20,0.55);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.topbar__inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 16px;
  align-items: center;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand__mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: rgba(99,102,241,0.16);
  color: #d5d6ff;
  border: 1px solid rgba(99,102,241,0.28);
}
.brand__name {
  font-weight: 750;
  letter-spacing: -0.02em;
}

.pill {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.14);
  color: var(--muted);
}

.nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
}
.nav a {
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 10px;
}
.nav a:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.topbar__cta { display: flex; gap: 10px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 650;
  border-radius: 12px;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(99,102,241,0.95), rgba(99,102,241,0.78));
  color: white;
  border: 1px solid rgba(99,102,241,0.55);
  box-shadow: 0 10px 40px rgba(99,102,241,0.20);
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }

.btn--ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.16);
  color: var(--text);
  box-shadow: none;
}
.btn--ghost:hover { background: rgba(255,255,255,0.06); }

.btn--tiny {
  padding: 6px 10px;
  border-radius: 10px;
  font-size: 12px;
}

.icon-btn {
  display: none;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 12px;
  padding: 10px;
  color: var(--text);
}
.icon-btn__bars {
  display: inline-block;
  width: 18px;
  height: 12px;
  position: relative;
}
.icon-btn__bars::before,
.icon-btn__bars::after,
.icon-btn__bars {
  background: linear-gradient(90deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
}
.icon-btn__bars::before,
.icon-btn__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 999px;
}
.icon-btn__bars::before { top: 0; }
.icon-btn__bars::after { bottom: 0; }
.icon-btn__bars { height: 2px; border-radius: 999px; top: 5px; }

.mobile-nav {
  border-top: 1px solid rgba(255,255,255,0.08);
  background: rgba(11,13,20,0.85);
}
.mobile-nav__inner {
  display: grid;
  gap: 10px;
  padding: 12px 0 18px;
}
.mobile-nav a {
  text-decoration: none;
  color: var(--muted);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.10);
}
.mobile-nav a:hover { color: var(--text); background: rgba(255,255,255,0.06); }

.hero {
  position: relative;
  padding: 72px 0 38px;
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: start;
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.04;
  margin: 0 0 14px;
  letter-spacing: -0.03em;
}
.accent {
  background: linear-gradient(90deg, #c7c8ff, #7c7fff 35%, #22c55e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead { font-size: 18px; line-height: 1.55; color: var(--muted); margin: 0 0 18px; }

.hero__stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 10px 0 18px;
}
.stat {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 14px;
  padding: 10px 12px;
  min-width: 110px;
}
.stat__k { font-weight: 800; font-size: 22px; }
.stat__v { color: var(--muted); font-size: 13px; }

.hero__actions { display: flex; gap: 10px; flex-wrap: wrap; }

.hero__card {
  border-radius: var(--radius2);
  border: 1px solid rgba(255,255,255,0.12);
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.04));
  padding: 18px 18px 16px;
  box-shadow: var(--shadow);
}
.hero__cardHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #c7c8ff;
  border: 1px solid rgba(99,102,241,0.35);
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(99,102,241,0.12);
}
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent2); box-shadow: 0 0 22px rgba(34,197,94,0.40); }

.section { padding: 56px 0; }
.section__header { margin-bottom: 18px; }
.section__header h2 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.02em; }

.grid {
  display: grid;
  gap: 14px;
}
.grid--cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--two { grid-template-columns: 1fr 1fr; }
.grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.05);
  padding: 16px;
}
.card h3 { margin: 0 0 8px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); line-height: 1.55; }
.card .meta { margin: 0 0 8px; color: var(--faint); font-size: 13px; }
.card code {
  font-size: 12px;
  padding: 2px 6px;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: 10px;
}

.bullets { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.65; }
.bullets li { margin: 6px 0; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.link { color: var(--accent); text-decoration: none; }
.link:hover { text-decoration: underline; }

.hr { height: 1px; background: rgba(255,255,255,0.10); margin: 14px 0; }

.stages { margin: 10px 0 0; padding-left: 18px; }
.stages li { margin: 6px 0; color: var(--muted); }
.stage {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-right: 10px;
  border-radius: 8px;
  background: rgba(99,102,241,0.18);
  border: 1px solid rgba(99,102,241,0.35);
  color: #d5d6ff;
  font-weight: 750;
  font-size: 12px;
}

.callout {
  border-radius: var(--radius2);
  border: 1px solid rgba(99,102,241,0.35);
  background: linear-gradient(180deg, rgba(99,102,241,0.14), rgba(99,102,241,0.06));
  padding: 16px;
  margin: 16px 0;
}
.callout__title { font-weight: 800; margin-bottom: 6px; }
.callout__body { color: var(--muted); line-height: 1.6; }
.callout__actions { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }

.codeblock {
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.35);
  overflow: hidden;
}
.codeblock__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 10px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04);
}
.codeblock__title { font-size: 12px; color: var(--muted); }
.codeblock pre {
  margin: 0;
  padding: 12px 12px 14px;
  overflow: auto;
  color: rgba(255,255,255,0.86);
  font-size: 12px;
  line-height: 1.6;
}

.swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.18);
  vertical-align: -1px;
}

.footer {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 26px 0;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
}
.footer__links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
}
.footer__links a { text-decoration: none; padding: 8px 10px; border-radius: 10px; }
.footer__links a:hover { background: rgba(255,255,255,0.06); color: var(--text); }

.brand--footer .pill { margin-left: 10px; }

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 700ms ease, transform 700ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Mermaid container */
.mermaid {
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.22);
  border-radius: 14px;
  padding: 10px 10px;
  overflow: auto;
}

/* Screenshots */
.shot { margin: 0; text-align: center; }
.shot__img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.12);
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(34,197,94,0.08));
}
.shot figcaption { margin-top: 8px; }

/* noscript fallback */
.noscript {
  text-align: center;
  padding: 12px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 980px) {
  .grid--cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--three { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__inner { grid-template-columns: 1fr; }
  .topbar__inner { grid-template-columns: 1fr auto; }
  .nav, .topbar__cta { display: none; }
  .icon-btn { display: inline-flex; justify-self: end; }
}

@media (max-width: 520px) {
  .container { width: min(var(--max), calc(100% - 32px)); }
  .grid--cards { grid-template-columns: 1fr; }
  .grid--two { grid-template-columns: 1fr; }
  .grid--three { grid-template-columns: 1fr; }
  .hero { padding-top: 58px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; transform: none; opacity: 1; }
}