/* Uzumaki site. Colours follow the app (docs/design-spec.md). No web fonts are shipped:
   Inter is used when it is installed, then the system UI font. */
:root {
  --bg: #0e0e11;
  --bg-2: #121216;
  --bg-3: #15151a;
  --card: #18181d;
  --line: #2a2a32;
  --text: #f2f2f5;
  --text-2: #b4b4bd;
  --text-3: #8a8a94;
  --accent: #ff7a8a;
  --accent-hi: #ffa3ae;
  --violet: #7a6cd0;
  --radius: 14px;
  --font: "Inter", "Inter Variable", system-ui, -apple-system, "Segoe UI", "Noto Sans", "Cantarell", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "Fira Code", "Cascadia Mono", "DejaVu Sans Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hi); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
code { font-family: var(--mono); font-size: .92em; color: var(--accent); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0; }
h2 { font-size: clamp(1.7rem, 1.2rem + 2vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 650; letter-spacing: -.01em; }
p { margin: 0; }

.wrap { width: min(1140px, 100% - 40px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #111; padding: 8px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

/* ---------------------------------------------------------------- nav */
.nav {
  position: sticky; top: 0; z-index: 5;
  background: rgba(14, 14, 17, .78);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.05rem; letter-spacing: -.01em; }
.brand:hover { color: var(--text); }
.brand img { border-radius: 7px; }
.nav nav { display: flex; gap: 26px; }
.nav nav a { color: var(--text-2); font-size: .94rem; font-weight: 500; }
.nav nav a:hover { color: var(--text); }

/* ---------------------------------------------------------------- hero */
.hero { position: relative; overflow: hidden; padding: 72px 0 40px; text-align: center; isolation: isolate; }
.swirl {
  position: absolute; inset: -20% -10% auto; height: 900px; z-index: -1; pointer-events: none;
  background:
    radial-gradient(closest-side at 38% 40%, rgba(122, 108, 208, .30), transparent 70%),
    radial-gradient(closest-side at 64% 46%, rgba(255, 122, 138, .22), transparent 70%);
  filter: blur(10px);
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: rotate(-6deg) scale(1); }
  to { transform: rotate(8deg) scale(1.08); }
}
.hero-icon { margin: 0 auto 22px; border-radius: 22px; box-shadow: 0 12px 40px rgba(255, 122, 138, .18); }
.hero h1 { font-size: clamp(2.8rem, 2rem + 4vw, 4.6rem); font-weight: 800; letter-spacing: -.04em; }
.pitch { font-size: clamp(1.2rem, 1rem + 1vw, 1.6rem); font-weight: 600; margin: 14px auto 0; max-width: 36ch; letter-spacing: -.015em; }
.sub { color: var(--text-2); margin: 14px auto 0; max-width: 58ch; font-size: 1.05rem; }

.cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 32px; }
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 24px; border-radius: 999px;
  font-weight: 650; font-size: 1rem; color: var(--text);
  background: #24242c; border: 1px solid #34343c;
  transition: background-color .15s, transform .15s;
}
.btn:hover { color: var(--text); background: #2c2c35; transform: translateY(-1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #111; }
.btn.primary:hover { background: var(--accent-hi); color: #111; }
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.soon { margin-top: 14px; color: var(--text-3); font-size: .9rem; }
.pill {
  display: inline-block; margin-right: 6px; padding: 2px 9px; border-radius: 999px;
  background: rgba(255, 122, 138, .14); color: var(--accent); font-weight: 600; font-size: .78rem;
  text-transform: uppercase; letter-spacing: .05em; vertical-align: 1px;
}

.shot { margin: 0; }
.shot img {
  border-radius: 12px; border: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .8), 0 0 0 1px rgba(0, 0, 0, .4);
  background: var(--bg-2);
}
.hero-shot { margin: 52px auto 0; max-width: 1100px; }
.note { margin-top: 12px; color: var(--text-3); font-size: .82rem; }

/* ---------------------------------------------------------------- features */
section { scroll-margin-top: 72px; }
.features { padding: 80px 0 40px; }
.features h2, .req h2, .faq h2 { max-width: 22ch; }
.lead { color: var(--text-2); font-size: 1.08rem; margin-top: 14px; max-width: 62ch; }
.grid { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid li, .card {
  background: linear-gradient(180deg, #16161b, #121216);
  border: 1px solid rgba(255, 255, 255, .06);
  border-radius: var(--radius); padding: 24px;
}
.grid li h3::before {
  content: ""; display: block; width: 28px; height: 3px; border-radius: 2px;
  background: var(--accent); margin-bottom: 14px;
}
.grid p, .card p { color: var(--text-2); margin-top: 8px; font-size: .96rem; }

.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 24px; margin-top: 56px; }
.gallery figcaption { color: var(--text-3); font-size: .9rem; margin-top: 12px; }

/* ---------------------------------------------------------------- uzu */
.uzu {
  margin-top: 60px; padding: 80px 0;
  background: linear-gradient(180deg, transparent, #0b0b0e 18%, #0b0b0e 82%, transparent);
}
.term-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 20px; margin-top: 40px; align-items: start; }
.term {
  background: #0a0a0c; border: 1px solid #26262d; border-radius: 12px; overflow: hidden;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, .9);
}
.term-bar { display: flex; align-items: center; gap: 7px; padding: 10px 14px; background: #141418; border-bottom: 1px solid #222228; }
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #34343c; }
.term-bar em { margin-left: 8px; color: var(--text-3); font: 500 .8rem var(--mono); font-style: normal; }
.term-scroll { overflow-x: auto; scrollbar-color: #34343c transparent; scrollbar-width: thin; }
.term pre {
  margin: 0; padding: 16px 18px; color: #d8d8de;
  font: 400 13.5px/1.25 var(--mono); white-space: pre; tab-size: 4;
  font-variant-ligatures: none;
}
.term pre i { font-style: normal; color: #4a4a55; }
.term pre b { font-weight: 700; }
.term pre .c { color: var(--accent); }
.term pre .m { color: var(--text-3); }
.term pre .p { color: #8be0a4; }
.term.small pre { font-size: 13px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; }
.uzu-points { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.uzu-points li { color: var(--text-2); font-size: .96rem; padding-left: 16px; border-left: 2px solid var(--line); }
.uzu-points strong { color: var(--text); font-weight: 600; }

/* ---------------------------------------------------------------- requirements, FAQ */
.req { padding: 60px 0 20px; }
.req-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 32px; }

.faq { padding: 80px 0 40px; }
.faq details { max-width: 820px; }
.faq h2 { margin-bottom: 24px; }
details { border-bottom: 1px solid var(--line); }
details:first-of-type { border-top: 1px solid var(--line); }
summary {
  cursor: pointer; list-style: none; padding: 18px 36px 18px 0; position: relative;
  font-weight: 600; font-size: 1.04rem;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; position: absolute; right: 6px; top: 50%; width: 9px; height: 9px;
  border-right: 2px solid var(--text-3); border-bottom: 2px solid var(--text-3);
  transform: translateY(-70%) rotate(45deg); transition: transform .2s;
}
details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
summary:hover { color: var(--accent-hi); }
details p { color: var(--text-2); padding: 0 0 20px; max-width: 68ch; }

/* ---------------------------------------------------------------- footer */
.foot { margin-top: 60px; border-top: 1px solid rgba(255, 255, 255, .06); background: var(--bg-2); }
.foot-in { padding: 36px 0 44px; display: grid; gap: 10px; }
.foot .brand { font-size: .98rem; }
.disclaimer { color: var(--text-2); font-size: .92rem; }
.fine { color: var(--text-3); font-size: .84rem; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 980px) {
  .grid, .req-grid, .uzu-points { grid-template-columns: 1fr 1fr; }
  .term-grid { grid-template-columns: 1fr; }
  .term.small { max-width: 520px; }
}
@media (max-width: 680px) {
  .nav nav { gap: 16px; }
  .nav nav a:nth-child(n+3) { display: none; }
  .hero { padding-top: 48px; }
  .hero-icon { width: 72px; height: 72px; }
  .grid, .req-grid, .uzu-points, .gallery { grid-template-columns: 1fr; }
  .btn { flex: 1 1 100%; justify-content: center; }
  .term pre { font-size: 11px; padding: 12px; }
  .features, .faq { padding-top: 56px; }
  .uzu { padding: 56px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}