/* sections.css — features, how it works, final CTA, footer, inline illustrations */
.section { padding: var(--sect) 0 0; }
.section--how { padding-bottom: var(--sect); }
.section__head { display: flex; flex-direction: column; align-items: center; gap: 18px; margin-bottom: clamp(40px, 6vw, 68px); text-align: center; }

/* ---------- Features grid ---------- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  position: relative; overflow: hidden; padding-bottom: 28px; border-radius: var(--r-xl);
  background: var(--glass); border: 1px solid var(--glass-border);
  box-shadow: var(--glass-hi), var(--shadow-1);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
  transition: transform var(--dur-3) var(--ease-out), border-color var(--dur-3) var(--ease-out);
}
.js .card.reveal { transition: opacity .8s var(--ease-out) var(--d, 0ms), translate .8s var(--ease-out) var(--d, 0ms), transform var(--dur-3) var(--ease-out), border-color var(--dur-3) var(--ease-out); }
.card::before { /* pointer spotlight: a radial gradient moved with transform */
  content: ""; position: absolute; left: 0; top: 0; width: 380px; height: 380px; margin: -190px 0 0 -190px; z-index: 0; pointer-events: none;
  background: radial-gradient(closest-side, rgba(255, 255, 255, .055), transparent);
  opacity: 0; transform: translate3d(var(--mx, 50%), var(--my, 50%), 0); transition: opacity var(--dur-4) var(--ease-out);
}
@media (hover: hover) {
  .card:hover { transform: translateY(-3px); border-color: var(--border-strong); }
  .card:hover::before { opacity: 1; }
}
.card > * { position: relative; z-index: 1; }
.card__art {
  position: relative; display: grid; place-items: center; height: 176px; margin: 8px; border-radius: 16px; overflow: hidden;
  background: radial-gradient(120% 110% at 50% 0%, rgba(255, 255, 255, .05), transparent 62%), rgba(0, 0, 0, .34);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .03);
}
.card__title { margin: 22px 24px 0; font-weight: 600; font-size: 18px; line-height: 1.25; letter-spacing: -.028em; }
.card__text { margin: 8px 24px 0; font-size: 14.5px; line-height: 1.55; color: var(--text-2); letter-spacing: -.005em; text-wrap: pretty; }

/* ---------- Inline illustrations ---------- */
.ill { width: min(100%, 292px); height: auto; overflow: visible; }
.i-panel { fill: #0E0F11; stroke: var(--border-strong); stroke-width: 1; }
.i-panel--back { fill: #0A0B0C; }
.i-panel--front { fill: #131416; }
.i-dot { fill: rgba(255, 255, 255, .2); }
.i-ln { fill: rgba(255, 255, 255, .17); }
.i-ln2 { fill: rgba(255, 255, 255, .08); }
.i-sep { stroke: var(--border-strong); stroke-width: 1; fill: none; }
.i-mint { fill: var(--accent); }
.i-soft { opacity: .5; }
.i-pill { fill: #08080A; stroke: rgba(255, 255, 255, .15); stroke-width: 1; }
.i-caret { animation: blink 1.05s steps(1) infinite; }
.i-label { font: 500 8.5px var(--font-mono); letter-spacing: .12em; fill: var(--text-3); }
.i-label--l { font-size: 8px; letter-spacing: .05em; }
.i-label--on { fill: var(--accent); }
.i-raw { font: 400 12px var(--font-mono); letter-spacing: 0; fill: var(--text-2); }
.i-clean { font: 500 15px var(--font-sans); letter-spacing: -.01em; fill: var(--text); }
.i-node { fill: #101113; stroke: var(--accent-line); stroke-width: 1; }
.i-strike { fill: var(--accent); transform-box: fill-box; transform-origin: left center; animation: strike 5s var(--ease-out) infinite; animation-delay: calc(var(--n) * 160ms); }
@keyframes strike { 0%, 10% { transform: scaleX(0); } 24%, 80% { transform: scaleX(1); } 94%, 100% { transform: scaleX(0); } }
.i-bars rect { fill: rgba(255, 255, 255, .92); transform-box: fill-box; transform-origin: center; animation: bar 1.4s ease-in-out infinite; animation-delay: calc(var(--n) * -130ms); }
@keyframes bar { 0%, 100% { transform: scaleY(.42); } 50% { transform: scaleY(1); } }
.i-chip { fill: #111214; stroke: var(--border-strong); stroke-width: 1; }
.i-chip--auto { fill: rgba(var(--accent-rgb), .07); stroke: var(--accent-line); }
.i-chip-t { font: 400 11px var(--font-mono); letter-spacing: 0; fill: var(--text); }
.i-cue { fill: var(--accent-soft); stroke: var(--accent-line); stroke-width: 1; }
.i-cue-t { font: 500 11px var(--font-mono); letter-spacing: 0; fill: var(--accent); }
.i-body { font: 400 12px var(--font-sans); letter-spacing: -.005em; fill: var(--text-2); }
.i-body--s { font-size: 11px; }
.i-body--on { fill: var(--text); }
.i-row { fill: #101113; stroke: var(--border); stroke-width: 1; }
.i-row--on { fill: rgba(var(--accent-rgb), .06); stroke: var(--accent-line); }
.i-radio { fill: none; stroke: var(--text-4); stroke-width: 1.2; }
.i-radio--on { stroke: var(--accent); }
.i-ring { fill: none; stroke: var(--accent); stroke-opacity: .42; stroke-width: 1; transform-box: fill-box; transform-origin: center; animation: ring 3.8s ease-out infinite; }
.i-ring--2 { animation-delay: 1.9s; }
@keyframes ring { from { transform: scale(.72); opacity: .8; } to { transform: scale(1.5); opacity: 0; } }
.i-pins rect { fill: rgba(255, 255, 255, .16); }
.i-cloud path { fill: none; stroke: var(--text-4); stroke-width: 1.4; stroke-linejoin: round; stroke-linecap: round; }
.i-cloud .i-cloud-x { stroke: var(--text-3); stroke-width: 1.6; }
.js .card:not(.is-in) .ill *, .js .steps:not(.is-in) * { animation-play-state: paused; }

/* ---------- How it works ---------- */
.steps { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 40px; }
.steps::before { /* the "line" the dots sit on; draws in on reveal */
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: linear-gradient(to right, rgba(255, 255, 255, .24), var(--border-strong) 40%, var(--border));
  transform-origin: left center; transition: transform 1.2s var(--ease-out) .2s;
}
.js .steps:not(.is-in)::before { transform: scaleX(0); }
.step { position: relative; padding-top: 44px; }
.step::before { /* dot */
  content: ""; position: absolute; left: 0; top: -4px; width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 5px var(--bg), 0 0 14px rgba(var(--accent-rgb), .4);
}
.step__viz { display: flex; align-items: center; height: 84px; margin-bottom: 24px; }
.step__viz .kbd { height: 38px; min-width: 42px; padding: 0 14px; font-size: 13px; border-radius: 10px; }
.step__viz .keys { gap: 8px; }
.mini-pill { width: 156px; height: auto; }
.step__n { font: 500 12px/1 var(--font-mono); letter-spacing: .1em; color: var(--text-3); }
.step__title { margin-top: 10px; font-weight: 600; font-size: 22px; line-height: 1.2; letter-spacing: -.032em; }
.step__text { margin-top: 8px; max-width: 30ch; font-size: 15px; line-height: 1.55; color: var(--text-2); text-wrap: pretty; }
.keys--anim .kbd { animation: press 3.6s var(--ease-in-out) infinite; animation-delay: calc(var(--k, 0) * 130ms); }
.keys--anim .kbd:nth-child(2) { --k: 1; } .keys--anim .kbd:nth-child(3) { --k: 2; }
@keyframes press {
  0%, 8% { transform: none; color: var(--text-2); border-color: var(--border-strong); }
  16%, 64% { transform: translateY(2px); color: var(--text); border-color: rgba(var(--accent-rgb), .5); }
  74%, 100% { transform: none; color: var(--text-2); border-color: var(--border-strong); }
}
.typed { font-size: 17px; line-height: 1.4; letter-spacing: -.012em; color: var(--text); max-width: 20em; }
.typed__w { display: inline-block; margin-right: .27em; animation: typed 6.4s var(--ease-out) infinite; animation-delay: calc(var(--w) * 150ms); }
@keyframes typed {
  0% { opacity: 0; transform: translateY(5px); filter: blur(4px); }
  5%, 84% { opacity: 1; transform: none; filter: none; }
  94%, 100% { opacity: 0; transform: none; filter: none; }
}

/* ---------- Final CTA ---------- */
.cta { position: relative; padding-bottom: var(--sect); }
.cta::before { /* dim glows behind the glass panel, so the blur has something to refract */
  content: ""; position: absolute; left: 50%; top: 4%; width: min(1100px, 100%); height: 76%; transform: translateX(-50%); z-index: -1; pointer-events: none;
  background:
    radial-gradient(closest-side at 30% 50%, rgba(146, 160, 200, .12), transparent),
    radial-gradient(closest-side at 72% 46%, rgba(var(--accent-rgb), .08), transparent);
}
.cta__panel {
  position: relative; overflow: hidden; display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: clamp(52px, 6.5vw, 76px) 24px clamp(44px, 5vw, 60px); border-radius: var(--r-2xl);
  background: var(--glass); border: 1px solid var(--glass-border);
  box-shadow: var(--glass-hi), var(--shadow-1);
  -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur);
}
.cta__panel::before { /* soft top light */ content: ""; position: absolute; left: 50%; top: -52%; width: 900px; height: 640px; margin-left: -450px; pointer-events: none; background: radial-gradient(closest-side, rgba(255, 255, 255, .07), transparent); }
.cta__panel > * { position: relative; }
.cta__mark { width: 48px; height: 48px; margin-bottom: 26px; color: var(--text); overflow: visible; }
.cta__mark circle { transform-box: fill-box; transform-origin: center; animation: dot-in 620ms var(--ease-out) .1s both; filter: drop-shadow(0 0 6px rgba(var(--accent-rgb), .5)); }
.cta__mark rect { transform-box: fill-box; transform-origin: left center; animation: line-in 420ms var(--ease-out) .55s both; }
.js .cta__panel:not(.is-in) .cta__mark * { animation-play-state: paused; }
.cta__title { font-size: clamp(42px, 7.2vw, 80px); letter-spacing: -.055em; }
.cta__sub { margin: 18px 0 34px; max-width: 30em; font-size: clamp(16px, 1.6vw, 18px); color: var(--text-2); text-wrap: balance; }
.cta .meta { margin-top: 18px; }
.cta__note { margin-top: 12px; max-width: 42em; font-size: 13px; line-height: 1.6; color: var(--text-3); }
.cta__note b { font-weight: 500; color: var(--text-2); }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 26px 0 34px; }
.footer__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px 32px; }
.footer__l { display: flex; align-items: center; gap: 18px; }
.footer__copy { font-size: 13px; color: var(--text-3); }
.footer__r { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 22px; font-size: 13px; color: var(--text-3); }
.footer__ver { font-family: var(--font-mono); font-size: 12px; font-variant-numeric: tabular-nums; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .steps { gap: 0 28px; }
}
@media (max-width: 720px) {
  .steps { grid-template-columns: 1fr; gap: 44px; padding-left: 28px; }
  .steps::before { left: 4px; right: auto; top: 0; bottom: 0; width: 1px; height: auto; transform-origin: top center; background: linear-gradient(to bottom, rgba(255, 255, 255, .24), var(--border-strong) 40%, var(--border)); }
  .js .steps:not(.is-in)::before { transform: scaleY(0); }
  .step { padding-top: 0; }
  .step::before { left: -28px; top: 6px; }
  .step__viz { height: 64px; margin-bottom: 18px; }
}
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .card__art { height: 176px; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .footer__r { flex-direction: column; align-items: flex-start; gap: 6px; }
}
@media (prefers-reduced-motion: reduce) {
  .i-strike, .i-bars rect, .i-ring, .i-caret, .keys--anim .kbd, .typed__w { animation: none; }
  .i-strike { transform: scaleX(1); }
  .i-ring { opacity: .3; }
  .steps::before { transition: none; }
  .cta__mark circle, .cta__mark rect { animation: none; }
  .card:hover { transform: none; }
}

/* Anchor offsets (sticky nav is --nav-h tall; .section has big top padding, so pull the heading just under the nav) */
#features { scroll-margin-top: calc(var(--nav-h) - var(--sect) + 28px); }
#download { scroll-margin-top: calc(var(--nav-h) + 12px); }