@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=DM+Sans:opsz,wght@9..40,400;9..40,500;9..40,600;9..40,700&family=Manrope:wght@500;600;700;800&display=swap");

/* ---------- Tokens ---------- */
:root {
  color-scheme: dark;
  --bg: #070b13;
  --bg-2: #0a101b;
  --surface: #0e1521;
  --surface-2: #131c2b;
  --line: rgba(150, 175, 215, 0.11);
  --line-strong: rgba(150, 175, 215, 0.22);
  --ink: #eaf1fb;
  --muted: #9aa8bd;
  --faint: #66758b;
  --accent: #63a7ff;
  --accent-2: #8fd8ff;
  --accent-ink: #06101f;
  --accent-soft: rgba(99, 167, 255, 0.12);
  --glow: rgba(99, 167, 255, 0.38);
  --warn: #ffb86b;
  --bad: #ff6f86;
  --good: #63e6b0;
  --shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.7);
  --mono: "DM Mono", ui-monospace, Consolas, monospace;
  --sans: "DM Sans", "Segoe UI", system-ui, sans-serif;
  --display: "Manrope", "Segoe UI", system-ui, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.65, 0, 0.35, 1);
  --slow: 1.4s;
  --radius: 22px;
  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f8fc;
  --bg-2: #eef2f8;
  --surface: #ffffff;
  --surface-2: #f2f5fa;
  --line: rgba(20, 40, 80, 0.09);
  --line-strong: rgba(20, 40, 80, 0.17);
  --ink: #111a28;
  --muted: #59677b;
  --faint: #8995a7;
  --accent: #2f7deb;
  --accent-2: #1fa3df;
  --accent-ink: #ffffff;
  --accent-soft: rgba(47, 125, 235, 0.1);
  --glow: rgba(47, 125, 235, 0.25);
  --warn: #d98316;
  --bad: #e0445f;
  --good: #14a676;
  --shadow: 0 30px 70px -35px rgba(20, 40, 80, 0.35);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out 0.45s var(--ease-soft) both; }
::view-transition-new(root) { animation: vt-in 0.8s var(--ease) both; }
@keyframes vt-out { to { opacity: 0; transform: translateY(-12px); filter: blur(6px); } }
@keyframes vt-in { from { opacity: 0; transform: translateY(18px); filter: blur(6px); } }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
  transition: background-color 0.6s var(--ease-soft), color 0.6s var(--ease-soft);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
code { font: 0.86em var(--mono); background: var(--accent-soft); color: var(--accent); padding: 0.12em 0.45em; border-radius: 6px; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 8px; }

.wrap { width: min(var(--wrap), 100% - var(--gutter) * 2); margin-inline: auto; }

/* Ambient backdrop: soft aurora + faint grid */
.backdrop { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.backdrop::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  opacity: 0.55;
}
.aurora { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; will-change: transform; }
.aurora-a { width: 46vw; height: 46vw; left: -12vw; top: -18vw; background: radial-gradient(circle, var(--glow), transparent 65%); animation: drift-a 28s var(--ease-soft) infinite alternate; }
.aurora-b { width: 38vw; height: 38vw; right: -10vw; top: 10vh; background: radial-gradient(circle, rgba(143, 216, 255, 0.22), transparent 65%); animation: drift-b 34s var(--ease-soft) infinite alternate; }
:root[data-theme="light"] .aurora { opacity: 0.35; }
@keyframes drift-a { to { transform: translate(14vw, 10vh) scale(1.15); } }
@keyframes drift-b { to { transform: translate(-12vw, 18vh) scale(0.9); } }

.scroll-progress { position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60; transform-origin: 0 50%; transform: scaleX(var(--progress, 0)); background: linear-gradient(90deg, var(--accent), var(--accent-2)); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 14px; z-index: 50;
  width: min(var(--wrap), 100% - var(--gutter) * 2); margin: 14px auto 0;
  display: flex; align-items: center; gap: 12px;
  padding: 8px 8px 8px 16px;
  border: 1px solid var(--line); border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
  transition: box-shadow 0.8s var(--ease), border-color 0.8s var(--ease), background-color 0.6s var(--ease-soft);
}
.site-header.is-scrolled { border-color: var(--line-strong); box-shadow: var(--shadow); }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 800 18px/1 var(--display); letter-spacing: -0.02em; }
.brand img { width: 30px; height: 30px; border-radius: 9px; transition: transform 1s var(--ease); }
.brand:hover img { transform: rotate(-12deg) scale(1.08); }
.site-nav { display: flex; gap: 2px; margin-inline: auto; position: relative; }
.site-nav a { position: relative; z-index: 1; padding: 8px 16px; border-radius: 999px; color: var(--muted); font-size: 15px; font-weight: 500; transition: color 0.5s var(--ease); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.nav-pill { position: absolute; z-index: 0; top: 0; height: 100%; border-radius: 999px; background: var(--accent-soft); border: 1px solid var(--line); transition: transform 0.7s var(--ease), width 0.7s var(--ease), opacity 0.4s; pointer-events: none; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.theme-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: transparent; cursor: pointer; transition: border-color 0.5s var(--ease), transform 0.8s var(--ease); }
.theme-toggle:hover { border-color: var(--line-strong); transform: rotate(25deg); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .sun { display: none; }
:root[data-theme="light"] .theme-toggle .sun { display: block; }
:root[data-theme="light"] .theme-toggle .moon { display: none; }
.menu-toggle { display: none; }

/* ---------- Buttons & links ---------- */
.btn {
  --bx: 0px; --by: 0px;
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px; border: 1px solid transparent;
  font: 600 15px/1 var(--sans); cursor: pointer; white-space: nowrap;
  transform: translate(var(--bx), var(--by));
  transition: transform 0.9s var(--ease), background-color 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.8s var(--ease);
}
.btn .arrow { display: inline-block; transition: transform 0.8s var(--ease); }
.btn:hover .arrow { transform: translate(3px, -1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 10px 40px -12px var(--glow); }
.btn-primary:hover { box-shadow: 0 16px 50px -10px var(--glow); }
.btn-ghost { border-color: var(--line-strong); background: color-mix(in srgb, var(--surface) 50%, transparent); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-sm { padding: 10px 16px; font-size: 14px; }
.btn[aria-disabled="true"] { opacity: 0.5; pointer-events: none; }

.text-link { display: inline-flex; gap: 8px; align-items: center; color: var(--accent); font-weight: 600; background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size 0.9s var(--ease); }
.text-link:hover { background-size: 100% 1px; }

/* ---------- Type ---------- */
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.035em; margin: 0; font-weight: 800; }
h1 { font-size: clamp(44px, 7.4vw, 96px); line-height: 0.98; }
h2 { font-size: clamp(34px, 4.8vw, 60px); line-height: 1.02; }
h3 { font-size: 21px; line-height: 1.25; letter-spacing: -0.02em; font-weight: 700; }
.dim { color: var(--faint); }
.grad { background: linear-gradient(100deg, var(--accent) 10%, var(--accent-2) 50%, var(--accent) 90%); background-size: 200% 100%; -webkit-background-clip: text; background-clip: text; color: transparent; animation: sheen 9s var(--ease-soft) infinite; }
@keyframes sheen { 50% { background-position: 100% 0; } }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 20px; font: 500 12px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.lede { font-size: clamp(18px, 1.6vw, 21px); color: var(--muted); max-width: 40ch; }
p { margin: 0 0 1em; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--glow); animation: pulse 2.6s var(--ease-soft) infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 9px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

/* Split-text headline reveal */
.split .w { display: inline-block; overflow: hidden; vertical-align: top; padding-bottom: 0.08em; margin-bottom: -0.08em; }
.split .w > span { display: inline-block; transform: translateY(105%); transition: transform var(--slow) var(--ease); transition-delay: calc(var(--i) * 70ms + 120ms); }
.split.in .w > span { transform: none; }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(46px); filter: blur(8px); transition: opacity 1.3s var(--ease), transform 1.5s var(--ease), filter 1.3s var(--ease); transition-delay: var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; filter: none; }

/* ---------- Sections ---------- */
section { position: relative; }
.section { padding-block: clamp(80px, 12vw, 150px); }
.section-head { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: end; margin-bottom: 56px; }
.section-head p { color: var(--muted); max-width: 46ch; margin: 0; }

/* Hero */
.hero { min-height: calc(100vh - 80px); display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; padding-block: 60px 40px; }
.hero h1 { margin-bottom: 28px; }
.hero .lede { margin-bottom: 36px; }
.button-row { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-note { margin-top: 28px; font: 13px/1.5 var(--mono); color: var(--faint); letter-spacing: 0.02em; }
.hero-stage { position: relative; aspect-ratio: 1; width: 100%; max-width: 560px; justify-self: end; }
.hero-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-icon { position: absolute; left: 50%; top: 50%; width: 17%; translate: -50% -50%; border-radius: 26%; box-shadow: 0 0 0 1px var(--line-strong), 0 20px 60px -10px var(--glow); animation: float 7s var(--ease-soft) infinite alternate; pointer-events: none; }
.hero-icon img { display: block; width: 100%; height: auto; aspect-ratio: 1; border-radius: inherit; }
@keyframes float { to { transform: translateY(-14px) rotate(-3deg); } }
.hero-readout { position: absolute; display: flex; flex-direction: column; gap: 2px; padding: 12px 14px; border-radius: 14px; border: 1px solid var(--line); background: color-mix(in srgb, var(--surface) 72%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); font: 12px/1.35 var(--mono); color: var(--muted); box-shadow: var(--shadow); }
.hero-readout strong { font: 700 20px/1.1 var(--display); color: var(--ink); letter-spacing: -0.02em; }
.hero-readout.r1 { left: 0; top: 14%; }
.hero-readout.r2 { right: 2%; bottom: 12%; }
.hero-hint { position: absolute; left: 50%; bottom: -6px; translate: -50% 0; font: 12px var(--mono); color: var(--faint); white-space: nowrap; }

/* Marquee */
.marquee { border-block: 1px solid var(--line); overflow: hidden; padding: 22px 0; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 56px; width: max-content; animation: marquee 48s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee span { display: inline-flex; align-items: center; gap: 14px; font: 600 clamp(18px, 2vw, 24px)/1 var(--display); letter-spacing: -0.02em; color: var(--muted); white-space: nowrap; }
.marquee i { font: 500 12px var(--mono); font-style: normal; color: var(--accent); padding: 5px 8px; border: 1px solid var(--line-strong); border-radius: 999px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* Spotlight cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  --mx: 50%; --my: 50%;
  position: relative; overflow: hidden; isolation: isolate;
  padding: 30px; border-radius: var(--radius);
  border: 1px solid var(--line); background: var(--surface);
  transition: border-color 0.8s var(--ease), transform 1s var(--ease), background-color 0.6s var(--ease-soft);
}
.card::before { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(420px circle at var(--mx) var(--my), var(--accent-soft), transparent 60%); opacity: 0; transition: opacity 0.8s var(--ease); }
.card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.card:hover::before { opacity: 1; }
.card-tag { font: 500 12px var(--mono); color: var(--faint); letter-spacing: 0.12em; }
.card-icon { width: 52px; height: 52px; margin: 34px 0 26px; border-radius: 16px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); border: 1px solid var(--line); transition: transform 1.1s var(--ease); }
.card:hover .card-icon { transform: rotate(-8deg) scale(1.06); }
.card-icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 12px; }
.card p { color: var(--muted); font-size: 16px; }
.card .text-link { margin-top: 8px; font-size: 15px; }

/* Demo lab */
.lab { display: grid; grid-template-columns: 280px 1fr; gap: 18px; }
.lab-tabs { display: flex; flex-direction: column; gap: 6px; position: relative; }
.lab-tab { position: relative; display: grid; grid-template-columns: auto 1fr; gap: 2px 14px; align-items: center; text-align: left; padding: 16px 18px; border-radius: 16px; border: 1px solid transparent; background: transparent; cursor: pointer; transition: background-color 0.6s var(--ease), border-color 0.6s var(--ease); }
.lab-tab:hover { background: var(--surface); }
.lab-tab[aria-selected="true"] { background: var(--surface); border-color: var(--line-strong); }
.lab-tab .n { grid-row: span 2; font: 500 12px var(--mono); color: var(--faint); transition: color 0.6s var(--ease); }
.lab-tab[aria-selected="true"] .n { color: var(--accent); }
.lab-tab strong { font: 700 16px/1.2 var(--display); letter-spacing: -0.01em; }
.lab-tab small { color: var(--faint); font-size: 13px; line-height: 1.35; }
.lab-tab .bar { position: absolute; left: 0; top: 18%; bottom: 18%; width: 2px; border-radius: 2px; background: var(--accent); transform: scaleY(0); transition: transform 0.8s var(--ease); }
.lab-tab[aria-selected="true"] .bar { transform: scaleY(1); }
.lab-panels { position: relative; min-width: 0; }
.lab-panel[hidden] { display: none; }
.lab-panel { animation: panel-in 1s var(--ease) both; }
@keyframes panel-in { from { opacity: 0; transform: translateY(16px) scale(0.99); filter: blur(6px); } }

/* Demo widget */
.demo { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); overflow: hidden; box-shadow: var(--shadow); }
.demo-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.demo-title { font: 700 16px/1.2 var(--display); letter-spacing: -0.01em; }
.demo-sub { font-size: 14px; color: var(--muted); margin: 4px 0 0; }
.demo-canvas { position: relative; height: 340px; background: var(--bg-2); }
.demo-canvas canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; }
.demo-canvas.tall { height: 400px; }
.demo-canvas .overlay-label { position: absolute; top: 12px; left: 14px; font: 11px var(--mono); letter-spacing: 0.1em; color: var(--faint); pointer-events: none; text-transform: uppercase; }
.demo-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; padding: 16px 20px; border-top: 1px solid var(--line); }
.stats { display: flex; flex-wrap: wrap; gap: 8px 26px; margin-left: auto; }
.stat { display: flex; flex-direction: column; font: 11px/1.3 var(--mono); color: var(--faint); letter-spacing: 0.06em; text-transform: uppercase; }
.stat b { font: 700 19px/1.15 var(--display); letter-spacing: -0.02em; color: var(--ink); text-transform: none; font-variant-numeric: tabular-nums; transition: color 0.5s var(--ease); }
.stat b.warn { color: var(--warn); }
.stat b.bad { color: var(--bad); }
.stat b.good { color: var(--good); }

/* Switch */
.switch { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; font-size: 14px; font-weight: 600; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch .track { position: relative; width: 44px; height: 26px; border-radius: 999px; background: var(--line-strong); transition: background-color 0.6s var(--ease); }
.switch .track::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; box-shadow: 0 2px 6px rgba(0,0,0,.25); transition: transform 0.7s var(--ease); }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::after { transform: translateX(18px); }
.switch input:focus-visible + .track { outline: 2px solid var(--accent); outline-offset: 3px; }

/* Range */
.range { display: flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; }
.range output { font: 500 13px var(--mono); color: var(--accent); min-width: 4ch; }
input[type="range"] { -webkit-appearance: none; appearance: none; width: 150px; height: 26px; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 4px; border-radius: 4px; background: linear-gradient(90deg, var(--accent) var(--fill, 50%), var(--line-strong) var(--fill, 50%)); }
input[type="range"]::-moz-range-track { height: 4px; border-radius: 4px; background: var(--line-strong); }
input[type="range"]::-moz-range-progress { height: 4px; border-radius: 4px; background: var(--accent); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; margin-top: -7px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); transition: transform 0.5s var(--ease); }
input[type="range"]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); }
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.25); }

/* Work list */
.work { display: grid; grid-template-columns: 1fr 1.25fr; gap: 60px; }
.work-sticky { position: sticky; top: 120px; align-self: start; }
.work-sticky p { color: var(--muted); max-width: 40ch; margin-top: 24px; }
.work-list { border-top: 1px solid var(--line); }
.work-item { display: grid; grid-template-columns: 54px 1fr auto; gap: 18px; padding: 30px 6px; border-bottom: 1px solid var(--line); position: relative; }
.work-item::after { content: ""; position: absolute; left: 0; bottom: -1px; height: 1px; width: 100%; background: var(--accent); transform: scaleX(0); transform-origin: 0 50%; transition: transform 1.2s var(--ease); }
.work-item:hover::after { transform: scaleX(1); }
.work-item .idx { font: 500 13px var(--mono); color: var(--accent); padding-top: 4px; }
.work-item h3 { margin-bottom: 8px; transition: transform 0.9s var(--ease); }
.work-item:hover h3 { transform: translateX(6px); }
.work-item p { color: var(--muted); margin: 0; font-size: 16px; }
.work-item .tag { font: 500 11px var(--mono); letter-spacing: 0.12em; color: var(--faint); padding: 6px 10px; border: 1px solid var(--line); border-radius: 999px; height: fit-content; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; position: relative; }
.steps::before { content: ""; position: absolute; left: 30px; right: 30px; top: 30px; height: 1px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transform: scaleX(var(--line-p, 0)); transform-origin: 0 50%; transition: transform 2.4s var(--ease); }
.steps.in { --line-p: 1; }
.step { position: relative; padding: 0 8px; }
.step .num { display: grid; place-items: center; width: 60px; height: 60px; border-radius: 50%; background: var(--bg); border: 1px solid var(--line-strong); font: 500 14px var(--mono); color: var(--accent); margin-bottom: 26px; position: relative; }
.step h3 { margin-bottom: 10px; }
.step p { color: var(--muted); font-size: 16px; }
.after-link { margin-top: 40px; }

/* Compat */
.compat { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.compat > div > p { color: var(--muted); margin-top: 24px; max-width: 42ch; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.chip { padding: 11px 18px; border-radius: 999px; border: 1px solid var(--line-strong); font-weight: 600; font-size: 15px; transition: transform 0.9s var(--ease), border-color 0.6s var(--ease), background-color 0.6s var(--ease); }
.chip:hover { transform: translateY(-3px); border-color: var(--accent); }
.chip.req { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.chips small { flex-basis: 100%; margin-top: 10px; color: var(--faint); font: 12px/1.5 var(--mono); }

/* FAQ */
.faq { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); interpolate-size: allow-keywords; }
.faq-list summary { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 26px 4px; cursor: pointer; list-style: none; font: 700 19px/1.3 var(--display); letter-spacing: -0.015em; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .plus { position: relative; flex: none; width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--line-strong); transition: transform 0.9s var(--ease), background-color 0.6s var(--ease); }
.faq-list summary .plus::before, .faq-list summary .plus::after { content: ""; position: absolute; left: 50%; top: 50%; width: 10px; height: 1.5px; background: currentColor; translate: -50% -50%; }
.faq-list summary .plus::after { rotate: 90deg; transition: rotate 0.9s var(--ease); }
.faq-list details[open] .plus { transform: rotate(180deg); background: var(--accent-soft); }
.faq-list details[open] .plus::after { rotate: 0deg; }
.faq-list details::details-content { block-size: 0; overflow: hidden; opacity: 0; transition: block-size 0.9s var(--ease), opacity 0.9s var(--ease), content-visibility 0.9s allow-discrete; }
.faq-list details[open]::details-content { block-size: auto; opacity: 1; }
.faq-list details p { color: var(--muted); padding: 0 4px 26px; margin: 0; max-width: 62ch; }

/* CTA band */
.cta { position: relative; overflow: hidden; isolation: isolate; display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: end; padding: clamp(36px, 6vw, 72px); border-radius: 32px; border: 1px solid var(--line-strong); background: var(--surface); }
.cta::before { content: ""; position: absolute; inset: -40%; z-index: -1; background: conic-gradient(from 0deg, transparent 0 60%, var(--glow) 75%, transparent 90%); animation: spin 16s linear infinite; opacity: 0.6; }
.cta::after { content: ""; position: absolute; inset: 1px; z-index: -1; border-radius: 31px; background: var(--surface); }
@keyframes spin { to { transform: rotate(1turn); } }
.cta p { color: var(--muted); margin-bottom: 24px; }

/* Footer */
.site-footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 20px; padding: 40px 0 50px; margin-top: 80px; border-top: 1px solid var(--line); color: var(--faint); font-size: 14px; }
.site-footer .brand { font-size: 16px; color: var(--ink); }
.site-footer .brand img { width: 24px; height: 24px; border-radius: 7px; }
.site-footer p { margin: 6px 0 0; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { transition: color 0.5s var(--ease); }
.footer-links a:hover { color: var(--accent); }

/* ---------- Inner pages ---------- */
.page-hero { padding-block: clamp(80px, 12vw, 140px) clamp(40px, 6vw, 70px); }
.page-hero h1 { margin-bottom: 28px; max-width: 14ch; }
.page-hero .lede { max-width: 58ch; }

/* Features */
.feature-layout { display: grid; grid-template-columns: 220px 1fr; gap: 60px; }
.toc { position: sticky; top: 120px; align-self: start; display: flex; flex-direction: column; gap: 4px; border-left: 1px solid var(--line); }
.toc a { position: relative; padding: 8px 0 8px 18px; color: var(--faint); font-size: 14px; font-weight: 500; transition: color 0.6s var(--ease); }
.toc a::before { content: ""; position: absolute; left: -1px; top: 20%; bottom: 20%; width: 2px; background: var(--accent); transform: scaleY(0); transition: transform 0.8s var(--ease); }
.toc a.active { color: var(--ink); }
.toc a.active::before { transform: scaleY(1); }
.feature-block { padding-bottom: 110px; scroll-margin-top: 110px; }
.feature-block-head { display: flex; gap: 22px; align-items: baseline; margin-bottom: 30px; }
.feature-block-head .idx { font: 500 13px var(--mono); color: var(--accent); }
.feature-block-head .eyebrow { margin-bottom: 10px; }
.feature-items { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 26px; }
.feature-item { padding: 22px; border-radius: 18px; border: 1px solid var(--line); background: var(--surface); transition: border-color 0.7s var(--ease), transform 1s var(--ease); }
.feature-item:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.feature-item strong { display: block; font: 700 16px/1.3 var(--display); margin-bottom: 8px; letter-spacing: -0.01em; }
.feature-item span { color: var(--muted); font-size: 15px; line-height: 1.55; }
.feature-note { color: var(--muted); padding: 20px 22px; border-radius: 16px; border: 1px dashed var(--line-strong); margin-bottom: 26px; font-size: 16px; }
.feature-note strong { color: var(--ink); }
.new-badge { font: 500 10px var(--mono); letter-spacing: 0.12em; padding: 3px 7px; border-radius: 999px; background: var(--accent); color: var(--accent-ink); margin-left: 6px; vertical-align: 2px; }

.callout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; padding: clamp(30px, 5vw, 56px); border-radius: 28px; border: 1px solid var(--line); background: var(--surface); }
.callout p { color: var(--muted); margin: 0; }

/* Downloads */
.release-panel { padding: clamp(24px, 4vw, 44px); border-radius: 28px; border: 1px solid var(--line-strong); background: var(--surface); box-shadow: var(--shadow); }
.release-panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 30px; }
.release-panel-head h2 { font-size: clamp(26px, 3vw, 36px); }
.live-label { display: inline-flex; align-items: center; gap: 8px; font: 500 11px var(--mono); letter-spacing: 0.12em; color: var(--faint); white-space: nowrap; }
.version-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 6px; border-radius: 22px; background: var(--bg-2); border: 1px solid var(--line); position: relative; }
.version-pill { position: absolute; top: 6px; bottom: 6px; left: 6px; width: calc(50% - 9px); border-radius: 17px; background: var(--surface); border: 1px solid var(--accent); box-shadow: 0 10px 30px -14px var(--glow); transition: transform 0.9s var(--ease); }
.version-picker[data-selected="26.2"] .version-pill { transform: translateX(calc(100% + 6px)); }
.version-button { position: relative; z-index: 1; padding: 20px; border: 0; border-radius: 17px; background: transparent; cursor: pointer; text-align: left; color: var(--muted); transition: color 0.6s var(--ease); font-size: 15px; }
.version-button strong { display: block; font: 800 34px/1.05 var(--display); letter-spacing: -0.03em; margin: 4px 0; color: inherit; }
.version-button span { font: 12px var(--mono); color: var(--faint); }
.version-button[aria-pressed="true"] { color: var(--ink); }
.release-status { margin: 22px 0 0; font: 13px var(--mono); color: var(--faint); }
.release-result { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-top: 20px; padding: 26px; border-radius: 20px; background: var(--bg-2); border: 1px solid var(--line); animation: panel-in 1s var(--ease) both; }
.release-result[hidden] { display: none; }
.release-result h3 { font-size: 26px; margin-bottom: 8px; }
.release-result p { color: var(--muted); font-size: 15px; }
.release-result .eyebrow { margin-bottom: 12px; }
.release-fallback { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 15px; color: var(--muted); }
.release-fallback a { color: var(--accent); font-weight: 600; }
.requirements-note { margin-top: 40px; padding: 18px 22px; border-radius: 16px; border: 1px dashed var(--line-strong); color: var(--muted); font-size: 15px; }
.requirements-note strong { color: var(--ink); }

/* Benchmarks */
.specs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 0; }
.specs div { padding: 22px; border-radius: 18px; border: 1px solid var(--line); background: var(--surface); }
.specs dt { font: 500 11px var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-bottom: 10px; }
.specs dd { margin: 0; font: 700 19px/1.25 var(--display); letter-spacing: -0.015em; }
.results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.result { padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--surface); display: flex; flex-direction: column; }
.result.hi { border-color: var(--accent); box-shadow: 0 30px 80px -40px var(--glow); }
.result .card-tag { margin-bottom: 26px; display: flex; gap: 10px; align-items: center; }
.result .card-tag::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--faint); }
.result.hi .card-tag::before { background: var(--accent); box-shadow: 0 0 12px var(--glow); }
.result h3 { margin-bottom: 6px; }
.result > p { color: var(--muted); font-size: 15px; }
.result .big-num { color: var(--ink); font: 800 clamp(48px, 5vw, 64px)/1 var(--display); letter-spacing: -0.045em; margin: 22px 0 6px; font-variant-numeric: tabular-nums; }
.big-num small { font: 500 13px var(--mono); letter-spacing: 0.04em; color: var(--faint); margin-left: 6px; }
.range-row { display: flex; gap: 24px; margin: 18px 0 24px; }
.range-row dt { font: 500 11px var(--mono); color: var(--faint); letter-spacing: 0.1em; text-transform: uppercase; }
.range-row dd { margin: 2px 0 0; font-weight: 700; }
.meter { margin-top: auto; height: 8px; border-radius: 8px; background: var(--bg-2); overflow: hidden; }
.meter span { display: block; height: 100%; width: var(--w); border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transform: scaleX(0); transform-origin: 0 50%; transition: transform 2.2s var(--ease) 0.3s; }
.result.in .meter span { transform: scaleX(1); }
.caption { margin-top: 18px; font: 12px var(--mono); color: var(--faint); }
.two-col { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; }
.two-col p { color: var(--muted); }
.lows { margin: 26px 0 0; border-top: 1px solid var(--line); }
.lows div { display: flex; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.lows dt { color: var(--muted); }
.lows dd { margin: 0; font-weight: 700; font-variant-numeric: tabular-nums; }

/* 404 */
.error-page { min-height: 70vh; display: flex; flex-direction: column; justify-content: center; padding-block: 80px; }
.error-code { font: 800 clamp(120px, 22vw, 260px)/0.85 var(--display); letter-spacing: -0.06em; margin-bottom: 30px; }
.error-page .lede { margin: 28px 0 36px; }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .hero, .section-head, .work, .compat, .faq, .cta, .callout, .two-col { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 50px; }
  .hero-stage { justify-self: center; max-width: 480px; }
  .work-sticky { position: static; }
  .cards, .results { grid-template-columns: 1fr; }
  .lab { grid-template-columns: 1fr; }
  .lab-tabs { flex-direction: row; overflow-x: auto; scrollbar-width: none; margin-inline: calc(var(--gutter) * -1); padding-inline: var(--gutter); }
  .lab-tabs::-webkit-scrollbar { display: none; }
  .lab-tab { flex: none; grid-template-columns: auto auto; }
  .lab-tab small { display: none; }
  .lab-tab .n { grid-row: auto; }
  .lab-tab .bar { left: 18%; right: 18%; top: auto; bottom: 0; width: auto; height: 2px; transform: scaleX(0); }
  .lab-tab[aria-selected="true"] .bar { transform: scaleX(1); }
  .feature-layout { grid-template-columns: 1fr; gap: 0; }
  .toc { display: none; }
  .specs { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .site-header { padding-left: 14px; }
  .menu-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: transparent; cursor: pointer; }
  .menu-toggle span { display: block; width: 16px; height: 1.5px; background: currentColor; position: relative; transition: background-color 0.4s; }
  .menu-toggle span::before, .menu-toggle span::after { content: ""; position: absolute; left: 0; width: 16px; height: 1.5px; background: currentColor; transition: transform 0.7s var(--ease); }
  .menu-toggle span::before { transform: translateY(-5px); }
  .menu-toggle span::after { transform: translateY(5px); }
  .menu-toggle[aria-expanded="true"] span { background: transparent; }
  .menu-toggle[aria-expanded="true"] span::before { transform: rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span::after { transform: rotate(-45deg); }
  .header-actions { margin-left: auto; }
  .header-actions .btn { display: none; }
  .site-nav { position: absolute; top: calc(100% + 10px); left: 0; right: 0; flex-direction: column; gap: 2px; padding: 10px; border-radius: 24px; border: 1px solid var(--line-strong); background: var(--surface); box-shadow: var(--shadow); opacity: 0; transform: translateY(-10px) scale(0.98); pointer-events: none; transition: opacity 0.6s var(--ease), transform 0.8s var(--ease); }
  .site-nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .site-nav a { padding: 14px 16px; font-size: 16px; }
  .nav-pill { display: none; }
  .site-nav a[aria-current="page"] { background: var(--accent-soft); }
  .steps { grid-template-columns: 1fr; gap: 34px; }
  .steps::before { display: none; }
  .feature-items { grid-template-columns: 1fr; }
  .work-item { grid-template-columns: 36px 1fr; }
  .work-item .tag { display: none; }
  .demo-canvas, .demo-canvas.tall { height: 300px; }
  .demo-head { flex-wrap: wrap; }
  .stats { margin-left: 0; }
  .release-result { flex-direction: column; align-items: stretch; }
  .release-result .btn { justify-content: center; }
  .version-button { padding: 16px 14px; }
  .version-button strong { font-size: 26px; }
  .specs { grid-template-columns: 1fr; }
  .hero-readout { padding: 9px 11px; }
  .hero-readout strong { font-size: 16px; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; transition-delay: 0ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; filter: none; }
  .split .w > span { transform: none; }
}

/* ---------- Transparency page ---------- */
.tr-facts { padding-bottom: clamp(48px, 8vw, 90px); }
.tr-facts strong { color: var(--ink); font-weight: 600; }
.chat-section { padding-block: 0 clamp(60px, 9vw, 110px); }
.chat-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; margin-bottom: 36px; }
.chat-intro > * { min-width: 0; }
.chat-intro p { color: var(--muted); margin: 0; }
.phone { max-width: 760px; margin-inline: auto; border: 1px solid var(--line-strong); border-radius: 28px; background: var(--surface); box-shadow: var(--shadow); overflow: hidden; position: relative; contain: layout paint; }
.phone-bar { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--surface-2); }
.phone-bar img { width: 34px; height: 34px; border-radius: 10px; flex: none; }
.phone-bar > div { min-width: 0; }
.phone-bar b { display: block; font: 700 15px/1.2 var(--display); color: var(--ink); }
.phone-bar small { display: block; font: 12px/1.3 var(--mono); color: var(--faint); }
.phone-bar .jump { margin-left: auto; flex: none; font: 500 12px var(--mono); color: var(--accent); background: var(--accent-soft); border: 1px solid transparent; border-radius: 999px; padding: 8px 12px; cursor: pointer; white-space: nowrap; transition: border-color 0.5s var(--ease); }
.phone-bar .jump:hover { border-color: var(--line-strong); }
.chat { height: min(70vh, 640px); overflow-y: auto; padding: 18px 16px 28px; display: flex; flex-direction: column; gap: 3px; overscroll-behavior: contain; -webkit-overflow-scrolling: touch; scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
.chat:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.chat .day { align-self: center; margin: 14px 0 8px; padding: 4px 12px; border-radius: 999px; background: var(--surface-2); font: 12px var(--mono); color: var(--faint); }
.chat .who { margin: 12px 6px 2px; font: 500 11px var(--mono); color: var(--faint); letter-spacing: 0.03em; display: flex; gap: 8px; align-items: center; }
.chat .who.me { align-self: flex-end; }
.chat .who i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); flex: none; }
.chat .who.sonnet i { background: var(--good); }
.bubble { max-width: 86%; padding: 10px 14px; border-radius: 18px; font-size: 15px; line-height: 1.5; overflow-wrap: anywhere; white-space: pre-wrap; }
.bubble.them { align-self: flex-start; background: var(--surface-2); color: var(--ink); border-bottom-left-radius: 6px; }
.bubble.me { align-self: flex-end; background: var(--accent); color: var(--accent-ink); border-bottom-right-radius: 6px; }
.bubble code { font: 13px var(--mono); padding: 1px 6px; border-radius: 6px; background: color-mix(in srgb, currentColor 12%, transparent); }
.bubble pre { margin: 8px 0 2px; padding: 10px 12px; border-radius: 12px; background: color-mix(in srgb, #000 28%, transparent); overflow-x: auto; white-space: pre; font: 12.5px/1.5 var(--mono); }
.bubble pre code { padding: 0; background: none; }
.bubble a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.bubble .tag { display: inline-block; margin-bottom: 4px; font: 500 12px var(--mono); opacity: 0.8; }
.chat-empty { margin: auto; color: var(--faint); font: 14px var(--mono); text-align: center; padding: 40px 20px; }
.chat-foot { padding: 12px 18px; border-top: 1px solid var(--line); font: 12px/1.5 var(--mono); color: var(--faint); text-align: center; }
.chat-fine { text-align: center; margin: 18px 0 0; font: 12px var(--mono); color: var(--faint); }
@media (max-width: 860px) { .chat-intro { grid-template-columns: 1fr; gap: 16px; } }
@media (max-width: 560px) { .phone { border-radius: 22px; } .phone-bar { padding: 12px 14px; gap: 10px; } .chat { height: min(72svh, 560px); padding: 14px 12px 24px; overscroll-behavior-y: auto; } .bubble { max-width: 94%; font-size: 14.5px; padding: 9px 12px; } }
@media (max-width: 400px) { .phone-bar small { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; } .phone-bar .jump { padding: 8px 10px; } }