:root {
  --sky: #d7e6f6;
  --fog: #eef4fb;
  --bg: #e8f0f8;
  --paper: #ffffff;
  --ink: #101828;
  --muted: #5b6b7c;
  --line: #d5e0ec;
  --accent: #2f6fed;
  --accent-ink: #ffffff;
  --deep: #14181f;
  --deep-2: #1c222c;
  --warn: #c2410c;
  --err: #b42318;
  --ok: #087443;
  --radius: 22px;
  --radius-sm: 12px;
  --sans: "Avenir Next", "Segoe UI", ui-sans-serif, system-ui, sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; }
body {
  min-height: 100vh;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(90% 55% at 50% -8%, #c8ddf5 0%, transparent 58%),
    radial-gradient(40% 36% at 92% 12%, #dce8f7 0%, transparent 70%),
    radial-gradient(34% 30% at 8% 88%, #d4e4f6 0%, transparent 70%),
    var(--bg);
  line-height: 1.5;
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

.brand-stage { position: relative; isolation: isolate; overflow: hidden; }
.constellation {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
  z-index: 0;
}
.brand-wrap {
  position: relative;
  z-index: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 22px 20px 72px;
}
@media (prefers-reduced-motion: reduce) {
  .constellation { opacity: 0.45; }
}
.brand-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 40px;
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.92rem;
}
.brand-mark svg { display: block; }
.brand-links { display: flex; gap: 18px; flex-wrap: wrap; }
.brand-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}
.brand-links a:hover,
.brand-links a[aria-current="page"] { color: var(--ink); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 11px 18px;
  font: 650 0.92rem/1 var(--sans);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-p { background: var(--ink); color: #fff; }
.btn-p:hover { background: #000; }
.btn-g { background: rgba(255,255,255,0.7); color: var(--ink); border-color: var(--line); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.hero { padding: 28px 0 8px; max-width: 640px; }
.hero h1 {
  margin: 14px 0 10px;
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  letter-spacing: -0.04em;
  line-height: 0.95;
}
.hero p { margin: 0; color: var(--muted); font-size: 1.12rem; max-width: 28em; }
.hero-cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }

.prompt {
  margin: 36px 0 8px;
  background: var(--deep);
  color: #ecece8;
  border-radius: 28px;
  padding: 14px 14px 12px;
  box-shadow: 0 18px 50px rgba(16, 24, 40, 0.18);
}
.prompt textarea {
  width: 100%;
  border: 0;
  background: transparent;
  color: #f4f4f0;
  font: 15px/1.55 var(--mono);
  resize: none;
  min-height: 92px;
  padding: 10px 12px 4px;
  outline: none;
}
.prompt-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 4px 6px 2px;
}
.prompt-hint { color: #8b93a0; font-size: 0.78rem; }
.prompt-run {
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 999px;
  background: #fff;
  color: var(--deep);
  cursor: pointer;
  display: grid;
  place-items: center;
}
.prompt-run:hover { transform: translateY(-1px); }
.prompt-out {
  margin-top: 8px;
  padding: 8px 12px 4px;
  color: #b8c0cc;
  font: 13px/1.55 var(--mono);
  min-height: 1.4em;
}
.prompt-out .err { color: #f0a8a0; }

.pills { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0 0; }
.pill {
  border: 1px solid rgba(255,255,255,0.08);
  background: var(--deep-2);
  color: #c5ccd6;
  border-radius: 999px;
  padding: 7px 12px;
  font: 600 0.78rem var(--sans);
  cursor: pointer;
}
.pill:hover { color: #fff; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 48px;
}
@media (max-width: 800px) { .grid-3 { grid-template-columns: 1fr; } }
.tile {
  background: rgba(255,255,255,0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 18px;
  min-height: 148px;
}
.tile h2 { margin: 0 0 8px; font-size: 1rem; }
.tile p { margin: 0; color: var(--muted); font-size: 0.95rem; }

.doc h1 { font-size: clamp(2rem, 5vw, 2.8rem); letter-spacing: -0.04em; margin: 0 0 10px; }
.doc h2 { font-size: 1.05rem; margin: 32px 0 8px; }
.doc p, .doc li { color: var(--muted); }
.doc pre, .doc table { background: rgba(255,255,255,0.78); border: 1px solid var(--line); border-radius: 16px; }
.doc pre { padding: 16px 18px; overflow: auto; font: 14px/1.55 var(--mono); }
.doc table { width: 100%; border-collapse: collapse; font-size: 0.95rem; overflow: hidden; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.doc code { font-family: var(--mono); }

.brand-foot {
  margin-top: 56px;
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.sparkles {
  position: relative;
  margin-top: 72px;
  min-height: 22rem;
  background: #05070c;
  color: #fff;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 20px 80px;
}
.sparkles-title {
  position: relative;
  z-index: 2;
  margin: 0;
  font-size: clamp(3.4rem, 14vw, 8rem);
  letter-spacing: 0.08em;
  font-weight: 800;
  line-height: 0.9;
}
.sparkles-stage {
  position: relative;
  width: min(40rem, 92vw);
  height: 10rem;
  margin-top: 8px;
}
.sparkles-grad,
.sparkles-grad-2,
.sparkles-grad-3,
.sparkles-grad-4 {
  position: absolute;
  top: 0;
  left: 12%;
  height: 2px;
  width: 76%;
  pointer-events: none;
}
.sparkles-grad {
  background: linear-gradient(90deg, transparent, #6366f1, transparent);
  filter: blur(4px);
}
.sparkles-grad-2 {
  height: 1px;
  background: linear-gradient(90deg, transparent, #6366f1, transparent);
}
.sparkles-grad-3,
.sparkles-grad-4 {
  left: 36%;
  width: 28%;
  height: 5px;
  background: linear-gradient(90deg, transparent, #38bdf8, transparent);
  filter: blur(6px);
}
.sparkles-grad-4 {
  height: 1px;
  filter: none;
}
.sparkles canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.sparkles-fade {
  position: absolute;
  inset: 0;
  background: #05070c;
  mask-image: radial-gradient(350px 200px at top, transparent 20%, #000 70%);
  -webkit-mask-image: radial-gradient(350px 200px at top, transparent 20%, #000 70%);
  pointer-events: none;
}
.sparkles .brand-foot {
  position: relative;
  z-index: 2;
  width: min(1040px, 92vw);
  margin-top: 36px;
  color: #8b93a0;
}
@media (prefers-reduced-motion: reduce) {
  .sparkles canvas { display: none; }
}