/* Zugit — homepage / review / about identity (Oct 2026)
   Paper, ink, one signal colour. Big type, little chrome. */
:root {
  --paper: #f5f2eb;
  --paper-2: #ebe7dd;
  --ink: #0f0f14;
  --ink-2: #44424d;
  --ink-3: #6f6c78;
  --line: #d8d3c6;
  --signal: #ff4a1c;
  --signal-ink: #c93a14;
  --working: #0f8a57;
  --risk: #b86e00;
  --failed: #cf2f26;
  --font: "Instrument Sans", system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --max: 1160px;
  --r: 14px;
}
*,*::before,*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }
.k {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* Header */
.hd { position: sticky; top: 0; z-index: 20; background: rgba(245,242,235,.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.hd .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.logo { font-weight: 700; font-size: 20px; letter-spacing: -.02em; text-decoration: none; display: flex; align-items: center; gap: 8px; }
.logo::before { content: ""; width: 10px; height: 10px; border-radius: 2px; background: var(--signal); transform: rotate(45deg); }
.nav { display: flex; gap: 26px; }
.nav a { text-decoration: none; font-size: 15px; color: var(--ink-2); font-weight: 500; }
.nav a:hover, .nav a[aria-current] { color: var(--ink); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; text-decoration: none; font-weight: 600; border-radius: 999px; padding: 12px 20px; font-size: 15px; border: 1.5px solid var(--ink); color: var(--ink); background: transparent; cursor: pointer; font-family: var(--font); transition: transform .12s ease, background .15s, color .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-lg { padding: 16px 26px; font-size: 17px; }
.btn-signal { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-signal:hover { background: var(--ink); border-color: var(--ink); }
@media (max-width: 820px) { .nav { display: none; } }

/* Hero */
.hero { padding: 72px 0 56px; border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
h1 { font-size: clamp(40px, 5.4vw, 68px); line-height: 1.0; letter-spacing: -.035em; font-weight: 700; margin: 0 0 22px; }
h1 em { font-style: normal; color: var(--signal); }
.lead { font-size: clamp(18px, 1.5vw, 21px); line-height: 1.45; color: var(--ink-2); margin: 0 0 28px; max-width: 34em; }
.lead b { color: var(--ink); font-weight: 600; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.small { font-size: 14px; color: var(--ink-3); margin: 16px 0 0; }
@media (max-width: 560px) { .brief-tabs { display: none; } .brief-bar .k { white-space: nowrap; } }
@media (max-width: 900px) {
  .hero { padding: 40px 0 40px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 36px; }
  h1 { font-size: clamp(34px, 9.6vw, 44px); }
}

/* Product visual — "the brief" */
.brief { background: #fff; border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 30px 60px -40px rgba(15,15,20,.45), 0 1px 0 rgba(255,255,255,.6) inset; overflow: hidden; }
.brief-bar { display: flex; align-items: center; justify-content: space-between; padding: 12px 18px; border-bottom: 1px solid var(--line); background: var(--paper-2); }
.brief-bar .k { color: var(--ink-2); }
.brief-tabs { display: flex; gap: 6px; }
.brief-tabs span { white-space: nowrap; font-family: var(--mono); font-size: 10.5px; padding: 4px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-3); }
.brief-tabs span.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.brief-body { padding: 18px 20px 20px; display: grid; gap: 14px; }
.brief-seg { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.seg { font-size: 14px; color: var(--ink-2); }
.seg b { color: var(--ink); font-weight: 600; }
.pill { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; padding: 5px 10px; border-radius: 999px; color: #fff; }
.pill-working { background: var(--working); }
.pill-risk { background: var(--risk); }
.pill-failed { background: var(--failed); }
.brief-row { display: grid; grid-template-columns: 96px 1fr; gap: 14px; align-items: start; padding-top: 12px; border-top: 1px dashed var(--line); }
.brief-row .k { padding-top: 3px; }
.brief-row p { margin: 0; font-size: 15px; line-height: 1.45; }
.brief-row p b { font-weight: 600; }
.brief-num { font-size: 30px; font-weight: 700; letter-spacing: -.03em; line-height: 1; margin: 0 0 4px; }
.owner { display: flex; align-items: center; gap: 10px; }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: var(--ink); color: var(--paper); font-family: var(--mono); font-size: 11px; display: grid; place-items: center; }
.track { display: grid; gap: 8px; }
.track-line { display: flex; justify-content: space-between; font-size: 13px; color: var(--ink-2); }
.track-line b { color: var(--ink); }
.bars { display: flex; align-items: flex-end; gap: 5px; height: 54px; }
.bars i { flex: 1; background: var(--paper-2); border-radius: 3px 3px 0 0; position: relative; }
.bars i.t { background: repeating-linear-gradient(135deg, var(--line) 0 3px, transparent 3px 6px); }
.bars i.now { background: var(--signal); }
.brief-foot { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); padding: 10px 20px 14px; border-top: 1px solid var(--line); line-height: 1.5; }

/* Sections */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.05; letter-spacing: -.03em; font-weight: 700; margin: 0 0 14px; max-width: 20em; }
.sub { font-size: 18px; color: var(--ink-2); margin: 0 0 36px; max-width: 36em; }
@media (max-width: 900px) { section { padding: 52px 0; } }

/* Credibility */
.cred { padding: 36px 0; background: var(--paper-2); }
.cred .wrap { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 28px; align-items: center; }
.cred p { margin: 0; }
.cred .who { display: flex; gap: 12px; align-items: center; }
.cred .who .avatar { width: 40px; height: 40px; font-size: 13px; }
.cred .who b { display: block; font-size: 15px; }
.cred .who span { font-size: 13.5px; color: var(--ink-2); }
.cred .arenas { font-size: 14px; color: var(--ink-2); line-height: 1.5; }
.cred .arenas b { color: var(--ink); font-weight: 600; }
@media (max-width: 900px) { .cred .wrap { grid-template-columns: 1fr; gap: 18px; } }

/* Product sequence */
.seq { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; background: #fff; }
.seq > div { padding: 22px 22px 24px; border-right: 1px solid var(--line); }
.seq > div:last-child { border-right: 0; }
.seq .k { color: var(--signal-ink); }
.seq h3 { margin: 8px 0 8px; font-size: 20px; letter-spacing: -.02em; }
.seq p { margin: 0; font-size: 15px; color: var(--ink-2); line-height: 1.5; }
.auto { margin: 28px 0 0; padding: 18px 22px; border-left: 3px solid var(--signal); font-size: 17px; color: var(--ink-2); background: #fff; border-radius: 0 var(--r) var(--r) 0; }
.auto b { color: var(--ink); font-weight: 600; }
@media (max-width: 900px) { .seq { grid-template-columns: 1fr 1fr; } .seq > div:nth-child(2) { border-right: 0; } .seq > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); } }
@media (max-width: 560px) { .seq { grid-template-columns: 1fr; } .seq > div { border-right: 0; border-bottom: 1px solid var(--line); } .seq > div:last-child { border-bottom: 0; } }

/* Proof */
.proof { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.proof article { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 24px; display: flex; flex-direction: column; }
.tag { align-self: flex-start; font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; padding: 5px 10px; border-radius: 999px; border: 1px solid; margin-bottom: 16px; }
.tag-est { color: var(--risk); border-color: var(--risk); }
.tag-impl { color: var(--ink-2); border-color: var(--ink-2); }
.tag-ver { color: var(--working); border-color: var(--working); }
.proof .num { font-size: 40px; font-weight: 700; letter-spacing: -.035em; line-height: 1; margin: 0 0 6px; }
.proof h3 { margin: 0 0 10px; font-size: 18px; letter-spacing: -.015em; line-height: 1.3; }
.proof p { margin: 0; font-size: 14.5px; color: var(--ink-2); line-height: 1.5; }
.proof .arena { margin-top: auto; padding-top: 14px; font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: .04em; }
.basis { margin: 18px 0 0; font-size: 13.5px; color: var(--ink-3); line-height: 1.55; max-width: 60em; }
@media (max-width: 900px) { .proof { grid-template-columns: 1fr; } }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 36px; }
.steps div { padding: 4px 0 0; border-top: 2px solid var(--ink); }
.steps .k { color: var(--ink); display: block; padding: 12px 0 6px; }
.steps h3 { margin: 0 0 6px; font-size: 21px; letter-spacing: -.02em; }
.steps p { margin: 0; color: var(--ink-2); font-size: 15.5px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } }

/* Final CTA */
.final { background: var(--ink); color: var(--paper); border-top: 0; }
.final h2 { color: var(--paper); }
.final .sub { color: rgba(245,242,235,.7); }
.final .btn-primary { background: var(--signal); border-color: var(--signal); color: #fff; }
.final .btn-primary:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* Footer */
.ft { padding: 28px 0; border-top: 1px solid var(--line); font-size: 14px; color: var(--ink-3); }
.ft .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.ft a { color: var(--ink-2); text-decoration: none; margin-left: 18px; }
.ft a:hover { color: var(--ink); }

/* Review page */
.review-hero { padding: 56px 0 24px; border-bottom: 0; }
.review-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: start; padding-bottom: 56px; }
@media (max-width: 900px) { .review-grid { grid-template-columns: 1fr; } }
.form { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; }
.form h2 { font-size: 24px; margin-bottom: 18px; }
.f { display: grid; gap: 6px; margin-bottom: 16px; }
.f label { font-size: 14px; font-weight: 600; }
.f input, .f textarea, .f select { font: inherit; font-size: 16px; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px; background: var(--paper); color: var(--ink); width: 100%; }
.f input:focus, .f textarea:focus { outline: 2px solid var(--signal); outline-offset: 1px; border-color: transparent; }
.f textarea { min-height: 96px; resize: vertical; }
.f-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 560px) { .f-row { grid-template-columns: 1fr; } }
.chk { display: flex; gap: 10px; align-items: flex-start; font-size: 14.5px; color: var(--ink-2); margin: 4px 0 18px; }
.chk input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--signal); }
.err { color: var(--failed); font-size: 14px; margin: 0 0 12px; }
.fine { font-size: 13px; color: var(--ink-3); margin: 14px 0 0; line-height: 1.5; }
.side h3 { font-size: 20px; margin: 0 0 10px; letter-spacing: -.02em; }
.side ul { margin: 0 0 22px; padding-left: 18px; color: var(--ink-2); }
.side li { margin-bottom: 8px; }
.side .box { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 20px 22px; margin-top: 8px; }
.side .box p { margin: 0 0 8px; font-size: 15px; color: var(--ink-2); }
.side .box p:last-child { margin: 0; }
.success { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 28px; }
.success h2 { font-size: 26px; }
.success .instr { margin-top: 20px; padding-top: 20px; border-top: 1px dashed var(--line); }
.success .instr p { font-size: 15px; color: var(--ink-2); }

/* About */
.people { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.person { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 26px; }
.person .avatar { width: 52px; height: 52px; font-size: 16px; margin-bottom: 14px; }
.person h3 { margin: 0 0 2px; font-size: 22px; letter-spacing: -.02em; }
.person .role { color: var(--ink-3); font-size: 14px; margin: 0 0 12px; font-family: var(--mono); }
.person p { color: var(--ink-2); font-size: 15.5px; margin: 0 0 12px; }
.person a { color: var(--signal-ink); font-weight: 600; text-decoration: none; font-size: 14.5px; }
.isnot { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.isnot div { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 24px; }
.isnot h3 { margin: 0 0 10px; font-size: 13px; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.isnot ul { margin: 0; padding-left: 18px; color: var(--ink-2); }
.isnot li { margin-bottom: 6px; }
.isnot .no h3 { color: var(--failed); }
.isnot .yes h3 { color: var(--working); }
.prose { max-width: 40em; color: var(--ink-2); font-size: 17px; }
.prose p { margin: 0 0 16px; }
.prose b { color: var(--ink); font-weight: 600; }
@media (max-width: 900px) { .people, .isnot { grid-template-columns: 1fr; } }