:root {
  --paper: #fbf8f2;
  --surface: #ffffff;
  --line: #e0d8c9;
  --ink: #1e2540;
  --muted: #6f6b61;
  --coral: #e2603f;
  --blue: #2f6bdb;
  --easy: #2e9e6a; --medium: #d9971e; --hard: #e2603f; --expert: #8456d0; --master: #2b3557;
  --radius: 22px;
  --font: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14161c; --surface: #1e212a; --line: #2d313c; --ink: #ece8e0; --muted: #9a9fac;
    --coral: #f07a5a; --master: #9aa6d6;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 17px/1.55 var(--font); -webkit-font-smoothing: antialiased;
}
a { color: var(--coral); text-decoration: none; }
a:hover { text-decoration: underline; }
img { display: block; max-width: 100%; height: auto; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header */
header.site { padding: 20px 0; }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 22px; letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 36px; height: 36px; border-radius: 22.5%; box-shadow: 0 2px 8px rgba(0,0,0,.12); }
.brand .dot { color: var(--coral); }
nav.site { display: flex; gap: 22px; font-weight: 600; font-size: 15px; }
nav.site a { color: var(--muted); }
nav.site a:hover { color: var(--ink); text-decoration: none; }

/* Hero */
.hero { padding: 40px 0 64px; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1.25fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--coral); }
.eyebrow::before { content: ""; width: 28px; height: 4px; border-radius: 4px; background: var(--coral); }
h1 { font-size: clamp(40px, 6vw, 64px); line-height: 1.02; letter-spacing: -0.03em; font-weight: 900; margin: 14px 0 18px; }
.lede { font-size: 20px; color: var(--muted); margin: 0 0 28px; max-width: 30ch; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.pill { display: inline-flex; align-items: center; gap: 10px; padding: 13px 20px; border-radius: 999px; font-weight: 700; font-size: 16px; }
.pill.dark { background: var(--ink); color: var(--paper); }
.pill.ghost { border: 1.5px solid var(--line); color: var(--ink); }
.pill.ghost:hover { text-decoration: none; border-color: var(--ink); }
.pill svg { width: 18px; height: 18px; }

/* Device frames */
.device { background: #0c0e13; padding: 10px; border-radius: 30px; box-shadow: 0 30px 60px -20px rgba(20, 22, 40, .45), inset 0 0 0 1.5px #2b2f3a; position: relative; }
.device img { border-radius: 21px; width: 100%; }
.device.crease::after { content: ""; position: absolute; top: 10px; bottom: 10px; left: 50%; width: 16px; transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(0,0,0,.06) 45%, rgba(255,255,255,.4) 50%, rgba(0,0,0,.06) 55%, transparent); pointer-events: none; }
.device.small { padding: 8px; border-radius: 24px; }
.device.small img { border-radius: 17px; }

/* Sections */
section { padding: 72px 0; }
section.alt { background: var(--surface); border-block: 1px solid var(--line); }
h2 { font-size: clamp(30px, 4vw, 42px); line-height: 1.1; letter-spacing: -0.02em; font-weight: 900; margin: 12px 0 14px; }
.sub { color: var(--muted); font-size: 18px; margin: 0 0 40px; max-width: 58ch; }

.postures { display: grid; grid-template-columns: 0.72fr 1.4fr 0.72fr; gap: 28px; align-items: end; }
.posture figcaption { margin-top: 16px; font-size: 15px; color: var(--muted); }
.posture figcaption b { display: block; color: var(--ink); font-size: 17px; margin-bottom: 2px; }
figure { margin: 0; }

.split { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: center; }
.split.flip { grid-template-columns: 1.3fr 1fr; }
.split.flip > :first-child { order: 2; }

.levels { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.levels li { display: grid; grid-template-columns: 12px 92px 1fr; gap: 14px; align-items: center; padding: 12px 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.levels i { width: 12px; height: 12px; border-radius: 50%; }
.levels b { font-size: 17px; }
.levels span { color: var(--muted); font-size: 15px; }

.hint-quote { border-left: 4px solid var(--coral); padding: 4px 0 4px 18px; margin: 24px 0 0; color: var(--ink); font-weight: 600; }
.hint-quote small { display: block; color: var(--muted); font-weight: 500; margin-top: 4px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
section.alt .card { background: var(--surface); }
.card h3 { margin: 10px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .ico { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; background: color-mix(in srgb, var(--coral) 14%, transparent); color: var(--coral); }
.card .ico svg { width: 20px; height: 20px; }

/* Docs (support, privacy) */
.doc { padding: 24px 0 80px; }
.doc .wrap { max-width: 760px; }
.doc h1 { font-size: clamp(36px, 5vw, 52px); }
.doc h2 { font-size: 24px; margin: 40px 0 8px; }
.doc p, .doc li { color: var(--ink); }
.doc .muted { color: var(--muted); }
.doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.contact { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 22px 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); margin: 28px 0; }
.contact b { display: block; font-size: 18px; }
.contact span { color: var(--muted); font-size: 15px; }
details { border: 1px solid var(--line); border-radius: 16px; padding: 4px 18px; margin: 10px 0; background: var(--surface); }
summary { cursor: pointer; font-weight: 700; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--coral); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { margin: 0 0 14px; color: var(--muted); }
kbd { font: 600 13px var(--font); padding: 1px 7px; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; background: var(--paper); }

/* Footer */
footer.site { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer.site nav { display: flex; gap: 20px; }
footer.site a { color: var(--muted); }

@media (max-width: 860px) {
  .hero .wrap, .split, .split.flip { grid-template-columns: 1fr; gap: 36px; }
  .split.flip > :first-child { order: 0; }
  .postures { grid-template-columns: 1fr 1fr; }
  .postures .posture:nth-child(2) { grid-column: 1 / -1; order: -1; }
  .grid { grid-template-columns: 1fr 1fr; }
  section { padding: 56px 0; }
}
@media (max-width: 540px) {
  .grid { grid-template-columns: 1fr; }
  nav.site { gap: 16px; }
  .levels li { grid-template-columns: 12px 76px 1fr; }
}

/* Let grid children shrink below their images' intrinsic width on small screens. */
.hero .wrap > *, .split > *, .postures > *, .grid > * { min-width: 0; }
picture.device { display: block; }