.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: var(--bg); padding: 0.6rem 1rem; z-index: 100; }
.skip:focus { left: 0.5rem; top: 0.5rem; }
.nav { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-in { max-width: 1120px; margin: 0 auto; padding: 0.65rem 1.25rem; display: flex; align-items: center; gap: 1.5rem; }
.nav nav { display: flex; gap: 1.4rem; margin-left: auto; font-size: 0.93rem; }
.nav nav a { text-decoration: none; color: var(--ink-2); }
.nav nav a:hover { color: var(--accent); }
.brand { font: 700 1.25rem var(--serif); letter-spacing: -0.02em; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; }
.brand .dot { width: 0.8em; height: 0.8em; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0.22em var(--accent-soft); }

main { overflow-x: clip; }
.section { scroll-margin-top: 4rem; padding: 4.5rem 1.25rem; max-width: 1120px; margin: 0 auto; }
.section.alt { max-width: none; background: var(--surface-2); }
.section.alt > * { max-width: calc(1120px - 2.5rem); margin-left: auto; margin-right: auto; }
.head { max-width: 62ch; margin-bottom: 2rem; }
.head h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
.fine { color: var(--muted); font-size: 0.85rem; }

/* hero */
.hero { max-width: 1120px; margin: 0 auto; padding: 4.5rem 1.25rem 3.5rem; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 3rem; align-items: center; }
.eyebrow { font: 700 0.8rem var(--sans); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); line-height: 1.07; letter-spacing: -0.025em; margin-bottom: 1.1rem; }
.lede { font-size: 1.15rem; color: var(--ink-2); max-width: 52ch; }
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin: 1.6rem 0 0.7rem; }

.grounding { margin: 0; display: flex; flex-direction: column; gap: 0.75rem; }
.grounding > div { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 0.9rem 1rem; box-shadow: var(--shadow); }
.grounding p { margin: 0.25rem 0 0; font-size: 0.95rem; }
.g-line { border-left: 4px solid var(--accent) !important; position: relative; }
.g-who { font-weight: 700; font-size: 0.85rem; }
.g-cites { position: absolute; right: 0.8rem; top: 0.7rem; }
.chip { font: 600 0.78rem var(--sans); border: 1px solid var(--line-strong); background: var(--surface); border-radius: 999px; padding: 0.1em 0.6em; color: var(--ink-2); cursor: pointer; }
.chip.on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.g-src { margin-left: 1.6rem; }
.g-src mark { background: var(--accent-soft); color: inherit; border-radius: 3px; padding: 0 0.1em; }
.g-label { font: 700 0.72rem var(--sans); letter-spacing: 0.07em; text-transform: uppercase; color: var(--muted); }
.g-label.err { color: var(--err); }
.g-bad { background: var(--err-soft) !important; border-color: color-mix(in srgb, var(--err) 30%, transparent) !important; }
.g-msg { color: var(--err); font-weight: 600; }
.grounding figcaption { font-size: 0.82rem; color: var(--muted); }

/* samples */
.samples { display: flex; flex-direction: column; gap: 1.5rem; }
.pick { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 10px; overflow: hidden; background: var(--surface); width: fit-content; max-width: 100%; }
.pick button { border: 0; background: none; font: 600 0.92rem var(--sans); padding: 0.7em 1.1em; cursor: pointer; color: var(--muted); min-height: 44px; text-align: left; }
.pick button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
.player { overflow: hidden; }
.p-head { padding: 1.25rem 1.4rem 0.9rem; border-bottom: 1px solid var(--line); }
.p-head h3 { font-size: 1.4rem; margin-bottom: 0.2rem; }
.p-head audio { width: 100%; margin-top: 0.8rem; }
.p-chapters { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.7rem; }
.p-chapters button { font: 600 0.8rem var(--sans); border: 1px solid var(--line-strong); background: var(--surface); border-radius: 999px; padding: 0.3em 0.8em; cursor: pointer; color: var(--ink-2); }
.p-chapters button:hover { border-color: var(--accent); color: var(--accent); }
.p-body { display: grid; grid-template-columns: 1.15fr 0.85fr; }
.p-col { padding: 1.1rem 1.4rem 1.3rem; max-height: 480px; overflow: auto; }
.p-col + .p-col { border-left: 1px solid var(--line); background: var(--surface-2); }
.p-col h4 { font: 700 0.75rem var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin: 0 0 0.8rem; }
.line { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.5rem 0.6rem; margin: 0 -0.6rem 0.15rem; border-radius: 8px; border-left: 3px solid transparent; transition: background 0.15s; }
.line.now { background: var(--accent-soft); border-left-color: var(--accent); }
.line .go { flex: none; width: 28px; height: 28px; border-radius: 50%; border: 1px solid var(--line-strong); background: var(--surface); cursor: pointer; font-size: 0.7rem; color: var(--ink-2); display: grid; place-items: center; margin-top: 0.1rem; }
.line .go:hover { border-color: var(--accent); color: var(--accent); }
.line .t { flex: 1; font-size: 0.98rem; }
.line .who { font-weight: 700; margin-right: 0.3rem; }
.line .cites { display: inline-flex; gap: 0.25rem; margin-left: 0.4rem; vertical-align: baseline; }
.chap { font: 700 0.72rem var(--sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin: 1rem 0 0.3rem; }
.chap:first-of-type { margin-top: 0; }
.psg { font-size: 0.9rem; border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: 0.6rem 0.75rem; margin-bottom: 0.55rem; transition: background 0.15s, border-color 0.15s; }
.psg b { color: var(--accent); margin-right: 0.3rem; }
.psg.hit { background: var(--accent-soft); border-color: var(--accent); }
.src-title { font-size: 0.85rem; color: var(--muted); margin: -0.3rem 0 0.8rem; }

/* steps and cards */
.steps4 { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; counter-reset: s; }
.steps4 li { position: relative; padding-top: 0.2rem; }
.steps4 b { display: inline-grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 0.95rem; margin-bottom: 0.7rem; }
.steps4 h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.steps4 p { color: var(--ink-2); font-size: 0.95rem; margin: 0; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
.tile { padding: 1.3rem 1.4rem; }
.tile h3 { margin-bottom: 0.4rem; }
.tile p { margin: 0; color: var(--ink-2); }

.price { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 2.5rem; align-items: start; }
.wait { padding: 1.3rem; }
.wl-row { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.wl-row input { flex: 1; min-width: 180px; }
.wl-msg { min-height: 1.4em; margin: 0.6rem 0 0; font-size: 0.9rem; }
.wl-msg.err { color: var(--err); }
.wl-msg.ok { color: var(--ok); }

.faq details { border-bottom: 1px solid var(--line); padding: 0.2rem 0; max-width: 760px; }
.faq summary { cursor: pointer; font-weight: 650; padding: 0.9rem 0; list-style-position: outside; }
.faq details p { color: var(--ink-2); margin: 0 0 1rem; }
.final { text-align: center; padding-bottom: 5.5rem; }
.final p { max-width: 46ch; margin: 0 auto 1.4rem; }
.foot { border-top: 1px solid var(--line); padding: 2rem 1.25rem 3rem; text-align: center; color: var(--muted); font-size: 0.88rem; }
.foot p { margin: 0 0 0.4rem; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 2rem; padding-top: 3rem; }
  .p-body { grid-template-columns: 1fr; }
  .p-col + .p-col { border-left: 0; border-top: 1px solid var(--line); }
  .p-col { max-height: 380px; }
  .steps4 { grid-template-columns: repeat(2, 1fr); }
  .price { grid-template-columns: 1fr; gap: 1.5rem; }
}
@media (max-width: 600px) {
  .nav nav { display: none; }
  .nav-in .btn { margin-left: auto; }
  .section { padding: 3rem 1rem; }
  .steps4, .cards { grid-template-columns: 1fr; }
  .p-head, .p-col { padding-left: 1rem; padding-right: 1rem; }
}