/* Sotto landing page. Brand colours live in :root; app.css shares the same tokens. */
:root {
  --bg: #09090b;
  --bg-2: #0e0e12;
  --panel: #121217;
  --panel-2: #17171d;
  --line: #24242c;
  --line-strong: #383842;
  --grid: rgba(236, 235, 242, 0.035);
  --text: #ecebf2;
  --text-2: #a4a2b0;
  --text-3: #6d6b79;
  --accent: #a585ff;
  --accent-hot: #c4b0ff;
  --accent-dim: rgba(165, 133, 255, 0.13);
  --accent-line: rgba(165, 133, 255, 0.42);
  --amber: #ffb547;
  --amber-dim: rgba(255, 181, 71, 0.12);
  --sans: "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --wrap: 1180px;
  --gutter: 28px;
  --radius: 6px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  color: var(--text);
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg, canvas, iframe { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-weight: 600; }
p { margin: 0; }
em { font-style: normal; color: var(--accent); }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.skip { position: absolute; left: -999px; top: 8px; z-index: 50; background: var(--accent); color: var(--bg); padding: 8px 14px; }
.skip:focus { left: 12px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 42px; padding: 0 18px; border-radius: 4px;
  font: 500 12.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; white-space: nowrap;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}
.btn-lg { height: 50px; padding: 0 24px; font-size: 13px; }
.btn-ink { background: var(--accent); color: var(--bg); }
.btn-ink::after { content: "→"; font-family: var(--mono); transition: transform 0.2s ease; }
.btn-ink:hover { background: var(--accent-hot); box-shadow: 0 0 0 4px var(--accent-dim), 0 0 28px rgba(165, 133, 255, 0.35); }
.btn-ink:hover::after { transform: translateX(3px); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: rgba(9, 9, 11, 0.5); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Brand mark */
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 600 20px/1 var(--sans); letter-spacing: -0.02em; }
.mark { width: 26px; height: 26px; color: var(--text); }

/* Nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  height: 68px; padding: 0 max(var(--gutter), calc((100vw - var(--wrap)) / 2));
  transition: background-color 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(9, 9, 11, 0.94); border-bottom-color: var(--line); }
.nav-links { display: flex; gap: 30px; font: 400 12.5px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; }
.nav-links a { text-decoration: none; color: var(--text-2); transition: color 0.2s; }
.nav-links a:hover { color: var(--accent); }
.nav-end { display: flex; align-items: center; gap: 12px; }

.socials { display: flex; gap: 6px; }
.social {
  display: grid; place-items: center; width: 36px; height: 36px; border-radius: 4px;
  border: 1px solid var(--line); color: var(--text-2); transition: border-color 0.2s, color 0.2s;
}
.social svg { width: 15px; height: 15px; }
.social:hover { border-color: var(--accent); color: var(--accent); }
.social.pending { opacity: 0.35; pointer-events: none; }

/* Hero */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: center;
  padding: 120px max(var(--gutter), calc((100vw - var(--wrap)) / 2)) 96px;
  overflow: hidden; isolation: isolate; background: var(--bg);
}
.ledger { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(90deg, var(--bg) 0%, rgba(9, 9, 11, 0.94) 40%, rgba(9, 9, 11, 0) 66%),
              linear-gradient(180deg, var(--bg) 0, rgba(9, 9, 11, 0) 110px),
              linear-gradient(0deg, var(--bg) 0%, rgba(9, 9, 11, 0) 22%);
}
.hero-inner { max-width: 640px; }
.status-chip {
  display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 8px 12px; border-radius: 4px; background: var(--panel); border: 1px solid var(--line);
  font: 500 11.5px/1.3 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-2);
}
.status-chip > span { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.status-chip .sep { color: var(--text-3); }
.dot { width: 7px; height: 7px; border-radius: 1px; display: inline-block; }
.dot-live { background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: pulse 2s ease-in-out infinite; }
.dot-preview { background: var(--amber); }
@keyframes pulse { 50% { opacity: 0.4; } }
.hero h1 {
  margin-top: 28px;
  font: 600 clamp(58px, 8.8vw, 128px)/0.9 var(--sans);
  letter-spacing: -0.055em;
}
.hero h1 em::after {
  content: ""; display: inline-block; width: 0.42em; height: 0.72em; margin-left: 0.08em; vertical-align: -0.02em;
  background: var(--accent); box-shadow: 0 0 24px rgba(165, 133, 255, 0.6);
  animation: cursor 1.1s steps(1) infinite;
}
@keyframes cursor { 50% { opacity: 0; } }
.lede { margin-top: 28px; max-width: 520px; font-size: 18.5px; line-height: 1.55; color: var(--text-2); }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }

.ca-bar {
  display: inline-flex; align-items: center; gap: 10px; margin-top: 28px; max-width: 100%;
  padding: 5px 5px 5px 12px; border-radius: 4px; border: 1px solid var(--line); background: var(--panel);
  font: 400 12.5px/1 var(--mono);
}
.ca-label { color: var(--accent); letter-spacing: 0.1em; }
.ca-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); min-width: 0; }
.ca-copy {
  flex: none; height: 28px; padding: 0 12px; border-radius: 3px; border: 0; cursor: pointer;
  background: var(--accent); color: var(--bg); font: 500 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase;
}
.ca-copy:disabled { background: var(--panel-2); color: var(--text-3); cursor: default; }

.lens-caption {
  position: absolute; right: max(var(--gutter), calc((100vw - var(--wrap)) / 2)); bottom: 36px;
  display: flex; gap: 22px; font: 400 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3);
}
.lens-caption span::before { content: ""; display: inline-block; width: 18px; height: 1px; margin-right: 8px; vertical-align: middle; background: currentColor; }
.lens-caption span:last-child { color: var(--accent); }

/* Sections */
.section { max-width: var(--wrap); margin: 0 auto; padding: 128px var(--gutter) 0; }
.section-head { max-width: 660px; margin-bottom: 56px; }
.kicker { font: 500 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 20px; }
.kicker::before { content: "// "; color: var(--text-3); }
.section-head h2, .closing h2 { font: 600 clamp(38px, 5.2vw, 66px)/1 var(--sans); letter-spacing: -0.045em; }
.section-head > p:not(.kicker) { margin-top: 20px; color: var(--text-2); font-size: 18px; }
.section-head .btn { margin-top: 28px; }

/* Bracketed corners on panels */
.card, .frame, .band, .prompts { position: relative; }
.card::before, .card::after, .frame::before, .frame::after, .prompts::before, .prompts::after {
  content: ""; position: absolute; width: 12px; height: 12px; pointer-events: none; border: 0 solid var(--accent); transition: width 0.3s ease, height 0.3s ease;
}
.card::before, .frame::before, .prompts::before { top: -1px; left: -1px; border-top-width: 1px; border-left-width: 1px; }
.card::after, .frame::after, .prompts::after { bottom: -1px; right: -1px; border-bottom-width: 1px; border-right-width: 1px; }
.card:hover::before, .card:hover::after { width: 26px; height: 26px; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card {
  display: flex; flex-direction: column; gap: 14px;
  padding: 26px; border-radius: 2px; background: var(--panel); border: 1px solid var(--line);
  transition: border-color 0.3s ease, background-color 0.3s ease;
}
.card:hover { border-color: var(--line-strong); background: var(--panel-2); }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.card-num { font: 400 12px/1 var(--mono); color: var(--text-3); letter-spacing: 0.1em; }
.card h3 { font: 600 26px/1.1 var(--sans); letter-spacing: -0.03em; margin-top: 6px; }
.card p { color: var(--text-2); font-size: 16px; }
.card-art { margin-top: auto; padding-top: 12px; width: 100%; height: auto; color: var(--text-3); }

.tag {
  display: inline-flex; align-items: center; gap: 7px; height: 22px; padding: 0 8px; border-radius: 2px;
  font: 500 10.5px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
}
.tag::before { content: ""; width: 5px; height: 5px; background: currentColor; }
.tag-live { background: var(--accent-dim); color: var(--accent); }
.tag-preview { background: var(--amber-dim); color: var(--amber); }

/* Statement band */
.band {
  max-width: calc(var(--wrap) - 2 * var(--gutter)); margin: 128px auto 0; padding: 84px 64px;
  border: 1px solid var(--line); background: var(--bg-2); overflow: hidden;
}
.band::before {
  content: ""; position: absolute; width: 640px; height: 640px; right: -220px; top: -260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.32), rgba(124, 92, 255, 0.08) 45%, transparent 70%);
}
.band::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(236, 235, 242, 0.025) 0 1px, transparent 1px 4px);
}
.band-kicker { position: relative; font: 500 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--amber); }
.band-kicker::before { content: "! "; }
.band-quote { position: relative; z-index: 1; margin-top: 26px; max-width: 920px; font: 500 clamp(28px, 3.8vw, 48px)/1.12 var(--sans); letter-spacing: -0.035em; }

/* Vault steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step { padding: 26px 24px; border: 1px solid var(--line); border-top: 2px solid var(--accent); background: var(--panel); }
.step-num { font: 500 12px/1 var(--mono); color: var(--accent); letter-spacing: 0.1em; }
.step h3 { margin-top: 18px; font: 600 32px/1 var(--sans); letter-spacing: -0.04em; }
.step p { margin-top: 12px; color: var(--text-2); font-size: 16px; }
.step-flow { display: flex; align-items: center; gap: 10px; margin-top: 24px; font: 400 11px/1 var(--mono); letter-spacing: 0.04em; text-transform: uppercase; }
.step-flow span { padding: 8px 10px; border-radius: 2px; border: 1px solid var(--line-strong); white-space: nowrap; color: var(--text-2); }
.step-flow span.soft { border-style: dashed; color: var(--accent); background: var(--accent-dim); border-color: var(--accent-line); }
.step-flow i { position: relative; flex: 1; height: 1px; min-width: 24px; background: var(--line-strong); }
.step-flow i::after {
  content: ""; position: absolute; top: -2px; left: 0; width: 5px; height: 5px; background: var(--accent); box-shadow: 0 0 10px var(--accent);
  animation: travel 2.4s linear infinite;
}
.step-flow i.still::after { left: 50%; margin-left: -2px; animation: pulse 1.6s ease-in-out infinite; }
@keyframes travel { 0% { left: 0; opacity: 0; } 12% { opacity: 1; } 88% { opacity: 1; } 100% { left: calc(100% - 5px); opacity: 0; } }

.notice {
  display: flex; align-items: flex-start; gap: 16px; margin-top: 32px; padding: 18px 22px;
  border-radius: 2px; background: var(--amber-dim); border: 1px solid rgba(255, 181, 71, 0.28);
}
.notice .tag { flex: none; margin-top: 2px; }
.notice p { color: var(--text-2); font-size: 16px; }
.notice strong { color: var(--text); font-weight: 600; }

/* Assistant */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.split .section-head { margin-bottom: 0; }
.prompts { display: flex; flex-direction: column; gap: 10px; padding: 24px; border: 1px solid var(--line); background: var(--panel); }
.prompts-label { font: 500 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); margin-bottom: 6px; }
.prompts-label::after { content: "_"; color: var(--accent); animation: cursor 1.1s steps(1) infinite; }
.prompt {
  display: flex; gap: 12px; padding: 15px 16px; border-radius: 2px; background: var(--bg-2); border: 1px solid var(--line);
  text-decoration: none; font: 500 16.5px/1.35 var(--sans); letter-spacing: -0.01em;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}
.prompt::before { content: ">"; font-family: var(--mono); color: var(--accent); }
.prompt:hover { border-color: var(--accent-line); background: var(--accent-dim); }

/* App frame */
.frame { border-radius: 2px; border: 1px solid var(--line-strong); background: var(--panel); box-shadow: 0 40px 120px -50px rgba(124, 92, 255, 0.45); }
.frame-bar { display: flex; align-items: center; gap: 7px; height: 40px; padding: 0 14px; border-bottom: 1px solid var(--line); font: 400 11.5px/1 var(--mono); letter-spacing: 0.06em; color: var(--text-3); text-transform: uppercase; }
.frame-bar span { width: 9px; height: 9px; border-radius: 1px; background: var(--line-strong); }
.frame-bar p { margin-left: 12px; }
.frame-bar a { margin-left: auto; text-decoration: none; color: var(--accent); }
.frame iframe { width: 100%; height: 680px; border: 0; background: var(--bg); }

/* FAQ */
.faq-list { max-width: 840px; border-top: 1px solid var(--line-strong); }
.faq details { border-bottom: 1px solid var(--line-strong); }
.faq summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
  padding: 22px 0; font: 500 21px/1.3 var(--sans); letter-spacing: -0.02em; transition: color 0.2s;
}
.faq summary:hover { color: var(--accent); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "[+]"; flex: none; font: 400 13px/1 var(--mono); color: var(--accent); }
.faq details[open] summary::after { content: "[−]"; }
.faq details p { padding: 0 0 24px; max-width: 700px; color: var(--text-2); }

/* Closing + footer */
.closing { max-width: var(--wrap); margin: 0 auto; padding: 150px var(--gutter) 130px; text-align: center; }
.closing h2 { font-size: clamp(52px, 8vw, 108px); margin-bottom: 36px; letter-spacing: -0.055em; }
.footer {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  max-width: var(--wrap); margin: 0 auto; padding: 28px var(--gutter) 36px; border-top: 1px solid var(--line);
  font: 400 12px/1.5 var(--mono); letter-spacing: 0.04em; color: var(--text-3);
}

/* Reveal on scroll (only once JS is running, so content is never hidden without it) */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1); }
.js .reveal.in { opacity: 1; transform: none; }

@media (max-width: 960px) {
  .nav-links { display: none; }
  .cards, .steps { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .band { margin-left: var(--gutter); margin-right: var(--gutter); padding: 64px 36px; }
}
@media (max-width: 640px) {
  :root { --gutter: 16px; }
  body { font-size: 16px; background-size: 48px 48px; }
  .nav { height: 60px; }
  .nav-end .socials { display: none; }
  .nav .btn { height: 36px; padding: 0 12px; font-size: 11.5px; }
  .hero { padding-top: 100px; padding-bottom: 88px; align-items: flex-end; }
  .hero::after {
    background: linear-gradient(180deg, var(--bg) 0, rgba(9, 9, 11, 0) 90px),
                linear-gradient(0deg, var(--bg) 0%, rgba(9, 9, 11, 0) 30%);
  }
  .hero h1 { font-size: 54px; }
  .status-chip { font-size: 10px; gap: 6px 12px; padding: 8px 10px; }
  .status-chip .sep { display: none; }
  .lede { font-size: 17px; }
  .cta-row .btn { flex: 1 1 auto; }
  .lens-caption { display: none; }
  .section { padding-top: 88px; }
  .section-head { margin-bottom: 36px; }
  .band { margin-top: 88px; padding: 52px 22px; }
  .notice { flex-direction: column; gap: 10px; }
  .prompts { padding: 16px; }
  .frame iframe { height: 560px; }
  .faq summary { font-size: 18px; }
  .closing { padding: 110px var(--gutter) 96px; }
  .footer { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .step-flow i::after { animation: none; left: 50%; }
  .dot-live, .hero h1 em::after, .prompts-label::after { animation: none; }
  .btn, .card, .prompt { transition: none; }
}