/* ---------- Tokens ---------- */
:root {
  --bg: #f6f5f1;
  --bg-alt: #edebe5;
  --surface: #ffffff;
  --ink: #111316;
  --ink-2: #3c4048;
  --muted: #6d717a;
  --line: #d9d6ce;
  --agent: #2f54eb;
  --agent-soft: rgba(47, 84, 235, 0.1);
  --human: #ff5b24;
  --human-soft: rgba(255, 91, 36, 0.12);
  --dark: #0d0f12;
  --dark-2: #161a20;
  --dark-line: #2a2f38;
  --dark-ink: #eef0f3;
  --dark-muted: #9aa1ad;

  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --radius: 16px;
  --wrap: 1160px;
  --gutter: 16px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d0f12;
    --bg-alt: #12151a;
    --surface: #171b21;
    --ink: #eef0f3;
    --ink-2: #c3c8d0;
    --muted: #8d94a0;
    --line: #262b33;
    --agent: #6b8bff;
    --agent-soft: rgba(107, 139, 255, 0.14);
    --human: #ff7a4a;
    --human-soft: rgba(255, 122, 74, 0.14);
    --dark: #08090b;
    --dark-2: #111418;
  }
}
:root[data-theme="dark"] {
  --bg: #0d0f12;
  --bg-alt: #12151a;
  --surface: #171b21;
  --ink: #eef0f3;
  --ink-2: #c3c8d0;
  --muted: #8d94a0;
  --line: #262b33;
  --agent: #6b8bff;
  --agent-soft: rgba(107, 139, 255, 0.14);
  --human: #ff7a4a;
  --human-soft: rgba(255, 122, 74, 0.14);
  --dark: #08090b;
  --dark-2: #111418;
}

@media (min-width: 720px) { :root { --gutter: 32px; } }

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }
a { color: inherit; }
img, svg { max-width: 100%; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--mono); letter-spacing: 0; }
.muted { color: var(--muted); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 12px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--agent); outline-offset: 3px; border-radius: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px;
  font: 600 15px/1 var(--font); text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--human); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }
.btn-light { background: var(--dark-ink); color: var(--dark); }
.btn-light:hover { background: var(--human); color: #fff; }
.btn:disabled { opacity: .55; cursor: progress; }

/* Mid-page CTA */
.cta-band {
  margin-top: 40px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px;
  padding: 24px 28px; border-radius: 16px; background: var(--bg-alt); border: 1px solid var(--line);
}
.cta-band p { color: var(--ink-2); font-size: 15.5px; max-width: 46em; }
.cta-band strong { color: var(--ink); font-size: 17px; }
.cta-band-dark { background: var(--dark-2); border-color: var(--dark-line); }
.cta-band-dark p { color: var(--dark-muted); }
.cta-band-dark strong { color: var(--dark-ink); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-logo { display: block; height: 28px; width: auto; }
.site-header .brand-logo { height: 30px; }

.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a { text-decoration: none; font-size: 15px; color: var(--ink-2); padding: 8px 12px; border-radius: 8px; }
.site-nav a:hover { color: var(--ink); background: var(--bg-alt); }
.site-nav .nav-cta { background: var(--ink); color: var(--bg); margin-left: 8px; padding: 8px 16px; border-radius: 999px; }
.site-nav .nav-cta:hover { background: var(--human); color: #fff; }
.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 6px;
    width: 44px; height: 44px; padding: 0 11px; border: 0; background: transparent; cursor: pointer; color: var(--ink);
  }
  .nav-toggle .bar { display: block; height: 2px; background: currentColor; border-radius: 2px; transition: transform .2s ease; }
  .nav-toggle[aria-expanded="true"] .bar:first-of-type { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .bar:last-of-type { transform: translateY(-4px) rotate(-45deg); }
  .site-nav {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px var(--gutter) 20px; background: var(--bg); border-bottom: 1px solid var(--line);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px 4px; font-size: 17px; border-radius: 0; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin: 16px 0 0; text-align: center; border-radius: 999px; border: 0; }
}

/* ---------- Hero ---------- */
.hero { padding: 56px 0 72px; }
.hero-grid { display: grid; gap: 48px; align-items: center; }
@media (min-width: 980px) {
  .hero { padding: 88px 0 104px; }
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; gap: 56px; }
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 13px/1 var(--mono); color: var(--ink-2);
  padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--human); box-shadow: 0 0 0 4px var(--human-soft); }
.hero h1 { margin-top: 24px; font-size: clamp(34px, 6.2vw, 64px); letter-spacing: -0.035em; line-height: 1.15; }
.hl { color: var(--human); }
.lede { margin-top: 24px; font-size: clamp(16px, 1.6vw, 18px); color: var(--ink-2); max-width: 36em; }
.lede strong { color: var(--ink); }
.audience { margin-top: 20px; font-size: 15px; font-weight: 600; color: var(--ink); display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; }
.audience .mono { font-size: 11px; font-weight: 500; color: var(--human); border: 1px solid var(--human); border-radius: 4px; padding: 2px 6px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 32px 0 0; }
.hero-tags li { font: 500 12px/1 var(--mono); color: var(--muted); padding: 8px 10px; border-radius: 6px; background: var(--bg-alt); }

/* Loop card */
.loop-card {
  margin: 0; background: var(--dark); color: var(--dark-ink);
  border-radius: 20px; padding: 16px; border: 1px solid var(--dark-line);
  box-shadow: 0 30px 60px -30px rgba(0,0,0,.35);
}
.loop-head { display: flex; justify-content: space-between; align-items: center; font-size: 12px; color: var(--dark-muted); padding: 4px 4px 0; }
.status { display: inline-flex; align-items: center; gap: 6px; font: 500 12px/1 var(--mono); }
.status i { width: 8px; height: 8px; border-radius: 50%; background: #3ddc84; }
.status.wait i { background: var(--human); animation: blink 1s steps(2) infinite; }
.status.wait em { color: var(--human); }
.status em { font-style: normal; }
@keyframes blink { 50% { opacity: .25; } }

.loop-svg { display: block; width: 100%; height: auto; max-width: 400px; margin: 0 auto; }
.loop-track { fill: none; stroke: var(--dark-line); stroke-width: 2; stroke-dasharray: 3 7; }
.loop-path { fill: none; stroke: none; }
.node circle { fill: var(--dark-2); stroke: #3a414d; stroke-width: 1.5; }
.node text { fill: var(--dark-ink); font: 600 13px var(--font); text-anchor: middle; }
.node text.sub { fill: var(--dark-muted); font: 400 9.5px var(--mono); }
.gate circle:not(.gate-ring) { stroke: var(--human); }
.gate-ring { fill: none !important; stroke: var(--human) !important; stroke-width: 1 !important; opacity: .35; transform-box: fill-box; transform-origin: center; }
.gate.active .gate-ring { animation: ring 1.2s ease-out infinite; }
.gate.active circle:not(.gate-ring) { fill: #2a160f; }
@keyframes ring { from { transform: scale(.8); opacity: .8; } to { transform: scale(1.35); opacity: 0; } }
.center-label { fill: var(--dark-muted); font: 500 13px var(--mono); text-anchor: middle; }
.token { fill: #7d97ff; filter: drop-shadow(0 0 6px rgba(125,151,255,.9)); }
.token.human { fill: var(--human); filter: drop-shadow(0 0 6px rgba(255,91,36,.9)); }

.loop-log {
  list-style: none; margin: 8px 0 0; padding: 12px; height: 200px;
  display: flex; flex-direction: column; justify-content: flex-end;
  background: var(--dark-2); border-radius: 12px; font-size: 11.5px; line-height: 1.6; color: var(--dark-muted);
  overflow: hidden;
}
.loop-log li { flex-shrink: 0; padding-left: 8ch; text-indent: -8ch; overflow-wrap: anywhere; animation: fadein .3s ease; }
.loop-log li + li { margin-top: 4px; }
.loop-log { position: relative; }
.loop-log::before { content: ""; position: absolute; inset: 0 0 auto; height: 40px; border-radius: 12px 12px 0 0; background: linear-gradient(var(--dark-2) 20%, transparent); pointer-events: none; z-index: 1; }
.loop-log span { white-space: pre; }
@media (min-width: 560px) { .loop-log { height: 176px; } }
.loop-log .tag-agent { color: #7d97ff; }
.loop-log .tag-hitl { color: var(--human); }
.loop-log .tag-human { color: #3ddc84; }
@keyframes fadein { from { opacity: 0; transform: translateY(4px); } }

/* ---------- Sections ---------- */
.section { padding: 80px 0; }
@media (min-width: 980px) { .section { padding: 120px 0; } }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--dark); color: var(--dark-ink); }
.section-dark .sec-lede { color: var(--dark-muted); }
.section-dark .kicker { color: var(--human); }
.sec-head { max-width: 720px; margin-bottom: 48px; }
.kicker { font-size: 13px; color: var(--agent); margin-bottom: 16px; }
.sec-head h2 { font-size: clamp(28px, 4.4vw, 44px); letter-spacing: -0.03em; }
.sec-lede { margin-top: 20px; font-size: 17px; color: var(--ink-2); }
.sec-lede strong { color: var(--ink); }
.section-dark .sec-lede strong { color: var(--dark-ink); }

/* Shift table */
.shift-table { border-top: 1px solid var(--ink); }
.shift-row { display: grid; grid-template-columns: 1fr; gap: 6px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.shift-row [role="rowheader"] { font: 500 12px/1.4 var(--mono); color: var(--muted); }
.shift-labels { display: none; }
.from { color: var(--muted); text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--muted) 60%, transparent); }
.to { font-weight: 600; font-size: 18px; }
.to::before { content: "→ "; color: var(--human); }
@media (min-width: 720px) {
  .shift-row { grid-template-columns: 160px 1fr 1.3fr; gap: 24px; align-items: baseline; padding: 24px 0; }
  .shift-labels { display: grid; padding: 14px 0; }
  .shift-labels span { font: 500 12px/1 var(--mono); color: var(--muted); text-transform: uppercase; }
  .shift-labels .to-h { color: var(--human); }
  .to { font-size: 20px; }
  .to::before { content: none; }
}

/* Why experts */
.why-grid { display: grid; gap: 40px; }
@media (min-width: 980px) { .why-grid { grid-template-columns: 0.85fr 1.15fr; gap: 56px; } }
.why-h { font-size: 13px; font-weight: 500; color: var(--human); margin: 0 0 16px; padding-bottom: 12px; border-bottom: 1px solid var(--dark-line); letter-spacing: 0; }
.why-item + .why-item { margin-top: 28px; }
.why-big { font-size: clamp(24px, 3vw, 32px); font-weight: 700; letter-spacing: -0.03em; color: var(--dark-ink); margin-bottom: 8px; }
.why-item p:not(.why-big) { color: var(--dark-muted); font-size: 15.5px; }
.why-quote { margin: 0 0 20px; padding: 22px 24px; border-left: 3px solid var(--human); background: var(--dark-2); border-radius: 0 12px 12px 0; }
.why-quote p { font-size: clamp(18px, 2.2vw, 22px); font-weight: 600; color: var(--dark-ink); line-height: 1.5; }
.why-quote cite, .stat cite { display: block; margin-top: 10px; font-style: normal; font-size: 12.5px; color: var(--dark-muted); }
.stats { display: grid; gap: 12px; }
@media (min-width: 560px) { .stats { grid-template-columns: 1fr 1fr; } }
.stat { padding: 20px; border: 1px solid var(--dark-line); border-radius: 14px; background: var(--dark-2); display: flex; flex-direction: column; }
.stat b { font: 600 34px/1.1 var(--mono); color: var(--dark-ink); letter-spacing: -0.02em; }
.stat p { margin-top: 10px; font-size: 14.5px; color: var(--dark-muted); }
.stat cite { margin-top: auto; padding-top: 12px; }
.section-dark sup a { color: var(--human); text-decoration: none; font-size: 11px; margin-left: 2px; }
.why-band { margin-top: 48px; }
.sources { margin-top: 36px; font-size: 12.5px; color: var(--dark-muted); }
.sources .mono { font-size: 11.5px; margin-bottom: 8px; }
.sources ol { margin: 0; padding-left: 18px; display: grid; gap: 4px; }
.sources a { color: var(--dark-muted); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--dark-line); overflow-wrap: anywhere; }
.sources a:hover { color: var(--dark-ink); }
.sources li:target { color: var(--dark-ink); }

/* Gap cards */
.gap-grid { display: grid; gap: 16px; }
@media (min-width: 860px) { .gap-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; } }
.gap { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.gap-n { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--human-soft); color: var(--human); font-weight: 600; }
.gap h3 { font-size: 20px; margin: 20px 0 10px; }
.gap p { color: var(--ink-2); font-size: 15.5px; }

/* Services */
.svc-grid { display: grid; gap: 16px; }
@media (min-width: 980px) { .svc-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; } }
.svc {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 28px;
  transition: border-color .2s ease, transform .2s ease;
}
.svc:hover { border-color: var(--ink-2); transform: translateY(-2px); }
.svc-featured { border-color: var(--human); box-shadow: 0 0 0 1px var(--human) inset; }
.svc-top { display: flex; justify-content: space-between; align-items: center; }
.svc-n { font-size: 13px; color: var(--muted); }
.svc-tag { font-size: 12px; padding: 6px 10px; border-radius: 6px; background: var(--agent-soft); color: var(--agent); font-weight: 500; }
.svc-tag.human { background: var(--human-soft); color: var(--human); }
.svc h3 { font-size: 23px; margin: 32px 0 12px; }
.svc-desc { color: var(--ink-2); font-size: 15.5px; }
.svc-list { list-style: none; padding: 20px 0 0; margin: 24px 0 0; border-top: 1px dashed var(--line); display: grid; gap: 10px; }
.svc-list li { position: relative; padding-left: 20px; font-size: 15px; }
.svc-list li::before { content: ""; position: absolute; left: 2px; top: 0.72em; width: 8px; height: 2px; background: var(--agent); }
.svc-featured .svc-list li::before { background: var(--human); }

/* Formal verification block */
.proof { margin-top: 24px; display: grid; gap: 28px; padding: 32px; border-radius: 20px; background: var(--dark); color: var(--dark-ink); border: 1px solid var(--dark-line); }
@media (min-width: 980px) { .proof { grid-template-columns: 0.9fr 1.1fr; gap: 48px; padding: 44px; } }
.proof-text .proof-k { font-size: 12px; color: var(--human); }
.proof h3 { font-size: clamp(24px, 3vw, 32px); margin: 12px 0 14px; }
.proof-text p { color: var(--dark-muted); font-size: 15.5px; }
.proof-text strong { color: var(--dark-ink); }
.proof-limit { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--dark-line); font-size: 14px !important; }
.proof-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.proof-list li { display: grid; gap: 6px; padding: 18px 20px; border-radius: 14px; background: var(--dark-2); border: 1px solid var(--dark-line); }
.proof-list b { font-size: 17px; }
.proof-list span { color: var(--dark-muted); font-size: 14.5px; }
.proof-list code { font: 500 13px/1.5 var(--mono); color: #7d97ff; background: rgba(125, 151, 255, .08); padding: 8px 10px; border-radius: 8px; white-space: pre-wrap; overflow-wrap: anywhere; }
.proof-note { grid-column: 1 / -1; font-size: 11.5px; color: var(--dark-muted); margin-top: -8px; }

/* Dial */
.dial { border: 1px solid var(--dark-line); border-radius: 20px; overflow: hidden; background: var(--dark-2); }
.dial-tabs { display: grid; grid-template-columns: repeat(5, 1fr); border-bottom: 1px solid var(--dark-line); }
.dial-tabs button {
  min-height: 56px; border: 0; background: transparent; color: var(--dark-muted);
  font: 500 15px var(--mono); cursor: pointer; position: relative;
}
.dial-tabs button + button { border-left: 1px solid var(--dark-line); }
.dial-tabs button:hover { color: var(--dark-ink); }
.dial-tabs button[aria-selected="true"] { color: var(--dark-ink); background: var(--dark); }
.dial-tabs button[aria-selected="true"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--human); }
.dial-panel { display: grid; gap: 32px; padding: 28px; }
@media (min-width: 860px) { .dial-panel { grid-template-columns: 1.1fr 1fr; gap: 48px; padding: 44px; align-items: center; } }
.dial-level { font-size: 13px; color: var(--human); }
.dial-text h3 { font-size: clamp(22px, 3vw, 30px); margin: 12px 0 14px; }
.dial-text p:last-child { color: var(--dark-muted); }
.bar-row { display: grid; grid-template-columns: 64px 1fr; align-items: center; gap: 12px; margin-bottom: 14px; font: 500 13px var(--mono); color: var(--dark-muted); }
.bar { height: 12px; border-radius: 999px; background: #232831; overflow: hidden; }
.bar i { display: block; height: 100%; width: var(--w, 50%); border-radius: inherit; background: #7d97ff; animation: grow .6s cubic-bezier(.2,.8,.2,1); }
@keyframes grow { from { width: 0; } }
.dial-panel[hidden] { display: none; }
.bar.human i { background: var(--human); }
.dial-ex { margin-top: 20px; font-size: 13px; color: var(--dark-ink); padding: 12px 14px; border: 1px dashed var(--dark-line); border-radius: 10px; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; counter-reset: s; }
@media (min-width: 860px) { .steps { grid-template-columns: repeat(4, 1fr); } }
.step { padding: 28px 0; border-top: 1px solid var(--ink); }
@media (min-width: 860px) { .step { padding: 28px 24px 0 0; } }
.step-n { font-size: 12px; color: var(--human); }
.step h3 { font-size: 22px; margin: 14px 0 10px; }
.step p { color: var(--ink-2); font-size: 15.5px; }

/* Company */
.company-grid { display: grid; gap: 16px; }
@media (min-width: 980px) { .company-grid { grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; } }
.facts { margin: 0; border-top: 1px solid var(--ink); }
.facts div { display: grid; grid-template-columns: 96px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.facts dt { font: 500 13px/1.7 var(--mono); color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; }
.facts .muted { font-weight: 400; font-size: 14px; }

/* FAQ */
.faq-grid { display: grid; gap: 16px; }
@media (min-width: 980px) { .faq-grid { grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; } }
.faq-list { border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 22px 0;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary h3 { font-size: 18px; font-weight: 600; }
.faq-item summary::after {
  content: "+"; flex-shrink: 0; width: 28px; height: 28px; display: grid; place-items: center;
  font: 400 20px/1 var(--mono); color: var(--muted); border: 1px solid var(--line); border-radius: 50%;
  transition: transform .2s ease;
}
.faq-item[open] summary::after { content: "−"; color: var(--human); border-color: var(--human); }
.faq-item summary:hover h3 { color: var(--human); }
.faq-item p { padding: 0 44px 24px 0; color: var(--ink-2); font-size: 15.5px; }

/* Track record */
.track { margin-top: 72px; }
.track-title { font-size: clamp(22px, 2.6vw, 28px); }
.track-lede { margin: 10px 0 24px; color: var(--ink-2); }
.track-grid { display: grid; gap: 16px; }
@media (min-width: 760px) { .track-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
.track-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.track-k { font-size: 11.5px; color: var(--agent); }
.track-card h4 { margin: 14px 0 10px; font-size: 20px; line-height: 1.3; letter-spacing: -0.02em; }
.track-card > p:not(.track-k):not(.track-ai) { color: var(--ink-2); font-size: 15px; }
.track-ai { margin-top: auto; padding-top: 18px; font-size: 14.5px; font-weight: 600; }
.track-ai .mono { font-size: 11px; font-weight: 500; color: var(--human); margin-right: 6px; }
.domains { margin-top: 28px; display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; }
.domains .mono { font-size: 12px; }
.domains ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.domains li { font-size: 14px; padding: 7px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); }
.track-note { margin-top: 18px; font-size: 13px; }
.clients { margin-top: 64px; }
.client-wall { list-style: none; margin: 20px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
@media (min-width: 640px) { .client-wall { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 980px) { .client-wall { grid-template-columns: repeat(6, 1fr); } }
.client-wall li { display: grid; place-items: center; text-align: center; min-height: 76px; padding: 12px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; color: var(--ink-2); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface); }
.projects { margin-top: 32px; display: grid; gap: 28px; }
@media (min-width: 860px) { .projects { grid-template-columns: repeat(2, 1fr); gap: 32px 48px; } }
.proj-group h4 { font-size: 13px; font-family: var(--mono); font-weight: 500; color: var(--human); margin: 0 0 10px; letter-spacing: 0; }
.proj-group ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.proj-group li { display: grid; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.proj-group li b { grid-column: 1; font-weight: 700; }
.proj-group li span { grid-column: 1; color: var(--ink-2); }

/* Contact */
.contact-grid { display: grid; gap: 16px; }
@media (min-width: 980px) { .contact-grid { grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: start; } }
.contact-direct { margin-top: 32px; display: flex; flex-direction: column; gap: 6px; }
.contact-direct .mono { font-size: 12px; }
.contact-direct a { font-size: 20px; font-weight: 600; text-decoration: none; border-bottom: 2px solid var(--human); align-self: flex-start; }
.contact-form { display: grid; gap: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 24px; }
@media (min-width: 720px) { .contact-form { padding: 36px; } }
.field-row { display: grid; gap: 18px; }
@media (min-width: 560px) { .field-row { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: 8px; margin: 0; border: 0; padding: 0; min-width: 0; }
.field > span, .field legend { font-size: 14px; font-weight: 600; color: var(--ink-2); padding: 0; }
.field input, .field textarea, .field select {
  width: 100%; font: 400 16px/1.5 var(--font); color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px;
}
.field textarea { resize: vertical; min-height: 120px; }
.field select { appearance: none; -webkit-appearance: none; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); cursor: pointer; }
.consent input { width: 18px; height: 18px; margin: 3px 0 0; accent-color: var(--ink); flex-shrink: 0; }
.consent details { margin-top: 4px; font-size: 13px; color: var(--muted); }
.consent summary { cursor: pointer; text-decoration: underline; text-underline-offset: 3px; width: fit-content; }
.consent[aria-invalid="true"], .consent input[aria-invalid="true"] { outline: 2px solid var(--human); outline-offset: 2px; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--agent); box-shadow: 0 0 0 3px var(--agent-soft); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--human); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips legend { width: 100%; margin-bottom: 8px; }
.chips label { cursor: pointer; position: relative; }
.chips input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; opacity: 0; pointer-events: none; }
.chips span { display: inline-block; font-size: 14px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--bg); transition: all .15s ease; }
.chips input:checked + span { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chips input:focus-visible + span { outline: 2px solid var(--agent); outline-offset: 2px; }
.contact-form .btn { justify-self: start; }
.form-note { font-size: 13.5px; }
.form-note.error { color: var(--human); }
.form-note.ok { color: #1f9d55; font-weight: 600; }

/* Contact box: AI chat + form tabs */
.contact-box { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.contact-tabs { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--line); }
.contact-tabs button { min-height: 52px; border: 0; background: var(--bg); color: var(--muted); font: 600 15px var(--font); cursor: pointer; position: relative; }
.contact-tabs button + button { border-left: 1px solid var(--line); }
.contact-tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); }
.contact-tabs button[aria-selected="true"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--human); }
.contact-box .contact-form { border: 0; border-radius: 0; background: transparent; }

.chat { display: flex; flex-direction: column; min-height: 520px; }
.chat[hidden] { display: none; }
.chat-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 6px 12px; padding: 14px 20px; border-bottom: 1px solid var(--line); }
.chat-title { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; }
.chat-dot { width: 8px; height: 8px; border-radius: 50%; background: #3ddc84; box-shadow: 0 0 0 4px rgba(61, 220, 132, .15); }
.chat-flow { font-size: 11.5px; color: var(--muted); }
.chat-log { list-style: none; margin: 0; padding: 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; max-height: 460px; overflow-y: auto; }
.chat-log:empty { display: none; }
.msg { display: flex; flex-direction: column; max-width: 86%; }
.msg p { margin: 0; padding: 10px 14px; border-radius: 14px; font-size: 15px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg-bot { align-self: flex-start; }
.msg-bot p { background: var(--bg-alt); border-top-left-radius: 4px; }
.msg-user { align-self: flex-end; }
.msg-user p { background: var(--ink); color: var(--bg); border-top-right-radius: 4px; }
.msg-sys { align-self: stretch; max-width: none; gap: 10px; align-items: flex-start; }
.msg-sys p { background: var(--human-soft); color: var(--ink); border-radius: 10px; font-size: 14px; }
.msg-typing p { display: inline-flex; gap: 4px; padding: 14px; }
.msg-typing i { width: 6px; height: 6px; border-radius: 50%; background: var(--muted); animation: dots 1s infinite ease-in-out; }
.msg-typing i:nth-child(2) { animation-delay: .15s; }
.msg-typing i:nth-child(3) { animation-delay: .3s; }
@keyframes dots { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }
.btn-sm { min-height: 40px; padding: 0 16px; font-size: 14px; }

.chat-start { padding: 28px 24px; display: grid; gap: 16px; align-content: start; flex: 1; }
.chat-start[hidden] { display: none; }
.chat-start-lead { font-size: 15.5px; color: var(--ink-2); }
.chat-start-lead strong { font-size: 18px; color: var(--ink); }
.chat-rules { margin: 0; padding: 0 0 0 18px; display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }
.chat-start .btn { justify-self: start; }
.turnstile-box:empty { display: none; }

.chat-suggest { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 20px 12px; }
.chat-suggest[hidden] { display: none; }
.chat-suggest button { font: 500 13.5px var(--font); padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg); color: var(--ink-2); cursor: pointer; }
.chat-suggest button:hover { border-color: var(--ink); color: var(--ink); }
.chat-input { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 12px 20px; border-top: 1px solid var(--line); }
.chat-input[hidden] { display: none; }
.chat-input textarea { width: 100%; resize: none; font: 400 15px/1.5 var(--font); color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.chat-input textarea:focus { outline: none; border-color: var(--agent); box-shadow: 0 0 0 3px var(--agent-soft); }
.chat-input .btn { align-self: end; min-height: 46px; }
.chat-note { padding: 0 20px 16px; font-size: 12.5px; }
.chat-note a, .consent a, .copy a { color: inherit; text-underline-offset: 3px; }

.chat-card { align-self: stretch; border: 1px solid var(--human); border-radius: 14px; padding: 16px; background: var(--surface); display: grid; gap: 12px; }
.card-head { font-size: 12px; color: var(--human); }
.chat-card dl { margin: 0; display: grid; gap: 6px; }
.chat-card dl div { display: grid; grid-template-columns: 96px 1fr; gap: 10px; font-size: 14px; }
.chat-card dt { color: var(--muted); }
.chat-card dd { margin: 0; overflow-wrap: anywhere; }
.card-form { display: grid; gap: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }
.card-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.card-note { font-size: 13px; min-height: 1em; }
.hitl-steps { list-style: none; margin: 0; padding: 12px 0 0; border-top: 1px dashed var(--line); display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.hitl-steps li { display: grid; gap: 2px; padding: 10px; border-radius: 10px; background: var(--bg); font-size: 13px; }
.hitl-steps b { font-size: 13.5px; }
.hitl-steps span { color: var(--muted); font-size: 12px; }
.hitl-steps .ok { background: rgba(61, 220, 132, .12); }
.hitl-steps .now { background: var(--human-soft); }
@media (prefers-reduced-motion: reduce) { .msg-typing i { animation: none; } }

/* Footer */
.site-footer { background: var(--dark); color: var(--dark-ink); padding: 56px 0 40px; }
.site-footer .brand { color: var(--dark-ink); }
.site-footer .muted { color: var(--dark-muted); }
.footer-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 28px; border-bottom: 1px solid var(--dark-line); }
.footer-top p { font: 400 13px var(--mono); }
.legal { font-style: normal; display: flex; flex-wrap: wrap; gap: 4px 0; margin-top: 24px; font-size: 13.5px; color: var(--dark-muted); }
.legal span:not(:last-child)::after { content: "|"; margin: 0 12px; color: var(--dark-line); }
.copy { margin-top: 16px; font-size: 13px; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .gate.active .gate-ring, .status.wait i, .bar i { animation: none; }
}