:root {
  --paper: #f7f5f0;
  --surface: #ffffff;
  --ink: #16191d;
  --ink-2: #3b4148;
  --muted: #646a72;
  --line: #e2ddd3;
  --accent: #1e3a5f;
  --accent-hover: #152b47;
  --accent-soft: #e9eef4;
  --ok: #2f6b4f;
  --err: #a33a2c;
  --radius: 10px;
  --max: 1120px;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(247, 245, 240, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand svg { width: 30px; height: 30px; }
.brand-name { font: 600 21px/1 var(--serif); letter-spacing: 0.01em; }
.brand-sub { display: block; font: 500 11px/1 var(--mono); color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; margin-top: 4px; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--ink-2); text-decoration: none; font-size: 15px; font-weight: 500; }
.nav a:hover { color: var(--accent); }
.nav .btn { color: #fff; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border-radius: 8px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; font: 600 15px/1 var(--sans);
  text-decoration: none; cursor: pointer; transition: background .15s, color .15s; white-space: nowrap;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-ghost:hover { background: var(--accent-soft); color: var(--accent-hover); }
.btn-sm { padding: 9px 14px; font-size: 14px; }

/* Type */
.eyebrow { font: 500 12px/1.4 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: clamp(36px, 5vw, 54px); line-height: 1.1; margin: 0 0 20px; }
h2 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.18; margin: 0 0 14px; }
h3 { font-size: 21px; line-height: 1.3; margin: 0 0 8px; }
.lede { font-size: 19px; color: var(--ink-2); max-width: 60ch; margin: 0 0 30px; }
.section-intro { color: var(--muted); max-width: 62ch; margin: 0; }

section { padding: 88px 0; scroll-margin-top: 68px; }
.section-head { margin-bottom: 44px; }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* Hero */
.hero { padding: 80px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-figure {
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px; box-shadow: 0 1px 0 rgba(0,0,0,.02), 0 18px 40px -24px rgba(22,25,29,.25);
}
.fig-caption { font: 500 12px/1.5 var(--mono); color: var(--muted); margin: 14px 2px 0; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.tag { font: 500 12px/1 var(--mono); color: var(--ink-2); background: var(--surface); border: 1px solid var(--line); padding: 7px 10px; border-radius: 999px; }

/* Problems */
.problems { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.problem { border-top: 2px solid var(--accent); padding-top: 18px; }
.problem p { color: var(--ink-2); margin: 0; }

/* Services */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.band .card { background: var(--paper); }
.card p { color: var(--ink-2); margin: 0 0 14px; font-size: 16px; }
.card ul { margin: 0; padding: 0; list-style: none; }
.card li { font: 500 13px/1.5 var(--mono); color: var(--muted); padding: 5px 0; border-top: 1px dashed var(--line); }
.card-num { font: 500 12px/1 var(--mono); color: var(--accent); margin-bottom: 14px; display: block; }

/* AI */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li { padding: 16px 0 16px 34px; border-bottom: 1px solid var(--line); position: relative; color: var(--ink-2); }
.checklist li:first-child { border-top: 1px solid var(--line); }
.checklist li::before {
  content: ""; position: absolute; left: 4px; top: 22px; width: 14px; height: 8px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}
.checklist strong { color: var(--ink); font-weight: 600; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; border-top: 1px solid var(--line); }
.step { padding: 26px 24px 0 0; }
.step + .step { padding-left: 24px; border-left: 1px solid var(--line); }
.step-num { font: 500 13px/1 var(--mono); color: var(--accent); display: block; margin-bottom: 14px; }
.step p { color: var(--ink-2); margin: 0; font-size: 16px; }

/* Engagements */
.engagement { display: flex; flex-direction: column; }
.engagement .meta { font: 500 12px/1.4 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 12px; }
.engagement .card-foot { margin-top: auto; padding-top: 18px; font-size: 15px; color: var(--ink-2); }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 48px; }
.principle h3 { font-size: 19px; }
.principle p { color: var(--ink-2); margin: 0; }

/* Contact */
.contact .wrap { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: start; }
.contact-details { list-style: none; padding: 0; margin: 28px 0 0; }
.contact-details li { padding: 14px 0; border-top: 1px solid var(--line); }
.contact-details .label { font: 500 12px/1.4 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .08em; display: block; margin-bottom: 2px; }
form, .contact-card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 30px; }
.contact-card .checklist { margin-bottom: 24px; }
.band .contact-card { background: var(--paper); }
.field { margin-bottom: 18px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
label .opt { font-weight: 400; color: var(--muted); }
input, select, textarea {
  width: 100%; font: 400 16px/1.4 var(--sans); color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 8px; padding: 11px 12px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); background: #fff; }
textarea { min-height: 140px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
.form-note { font-size: 13px; color: var(--muted); margin: 14px 0 0; }
.form-status { margin: 14px 0 0; font-weight: 600; font-size: 15px; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: center; }
.site-footer nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }

/* Legal pages */
.legal { padding: 64px 0 88px; }
.legal .wrap { max-width: 760px; }
.legal h1 { font-size: clamp(32px, 4vw, 42px); }
.legal h2 { font-size: 23px; margin: 40px 0 10px; }
.legal h3 { font-size: 18px; margin: 24px 0 6px; }
.legal p, .legal li { color: var(--ink-2); }
.legal .updated { font: 500 13px/1 var(--mono); color: var(--muted); margin-bottom: 28px; }

/* Responsive */
@media (max-width: 960px) {
  .hero .wrap, .split, .contact .wrap { grid-template-columns: 1fr; gap: 40px; }
  .grid-3, .problems { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .step:nth-child(3) { border-left: 0; padding-left: 0; }
  .step { padding-bottom: 24px; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  section { padding: 64px 0; }
  .hero { padding: 48px 0 56px; }
  .nav a:not(.btn) { display: none; }
  .brand-sub { display: none; }
  .grid-3, .problems, .steps, .principles, .field-row { grid-template-columns: 1fr; }
  .step + .step { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  form, .contact-card { padding: 22px; }
  .contact-card .btn { white-space: normal; text-align: center; }
}