/* ═══════════════════════════════════════════════
 * IN4M AI — Shared design system
 * Bold near-black canvas, electric green accent,
 * Archivo display + JetBrains Mono labels.
 * ═══════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --ink: #0a0a0b;
  --black: #000000;
  --surface: #131315;
  --surface-2: #1a1a1d;
  --line: rgba(255,255,255,0.11);
  --line-soft: rgba(255,255,255,0.06);
  --text: #f4f5f2;
  --text-dim: #9b9c97;
  --text-mute: #8a8b86;
  --green: #4ade80;
  --green-hi: #84ffb4;
  --green-deep: #122b1c;
  --paper: #f1f1ec;
  --danger: #f87171;
  --warn: #fbbf24;
  --font-display: 'Archivo', sans-serif;
  --font-body: 'Archivo', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --maxw: 1180px;
  --pad: 32px;
}

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 0; }
html, body {
  width: 100%; min-height: 100%;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body { position: relative; }
::selection { background: var(--green); color: #04140a; }
a { color: inherit; }

/* ── Mono eyebrow ── */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text-mute);
  display: inline-flex; align-items: center; gap: 10px;
}
.eyebrow .dot {
  width: 18px; height: 2px; border-radius: 0;
  background: var(--green);
}
@keyframes livePulse { 0%,100%{opacity:1} 50%{opacity:0.35} }

/* ── Wordmark ── */
.wordmark {
  font-family: var(--font-display);
  font-weight: 900; letter-spacing: -0.02em; line-height: 1;
  display: inline-flex; align-items: baseline; text-decoration: none;
}
.wordmark .in, .wordmark .m { color: #fff; }
.wordmark .four { color: var(--green); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-family: var(--font-body); font-weight: 700; font-size: 15px;
  letter-spacing: -0.01em; padding: 14px 24px; border-radius: 999px;
  text-decoration: none; cursor: pointer; border: 1.5px solid transparent;
  transition: transform 0.18s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}
.btn svg { flex-shrink: 0; }
.btn-primary { background: var(--green); color: #04140a; }
.btn-primary:hover { background: var(--green-hi); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: #fff; transform: translateY(-2px); }
.btn-light { background: #fff; color: #0a0a0b; }
.btn-light:hover { transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: 14px; }

/* ── Top nav ── */
.topnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 16px var(--pad);
  background: rgba(10,10,11,0.72);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}
.topnav .wordmark { font-size: 23px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  font-size: 14px; font-weight: 600; color: var(--text-dim);
  text-decoration: none; padding: 9px 14px; border-radius: 8px;
  letter-spacing: -0.01em; transition: color 0.18s, background 0.18s;
}
.nav-link:hover { color: #fff; }
.nav-link.active { color: var(--green); }
.nav-right { display: flex; align-items: center; gap: 14px; }
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--line);
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.hamburger span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.2s; }

/* ── Layout ── */
.wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.sec { padding: 96px 0; position: relative; }

/* ── Inner-page header ── */
.page-head { padding: 132px 0 8px; position: relative; overflow: hidden; }
.page-head .eyebrow { margin-bottom: 22px; }
.page-head > .page-ghost {
  position: absolute; font-family: var(--font-display); font-weight: 900;
  font-size: clamp(280px, 40vw, 560px); line-height: 0.7; color: #fff;
  opacity: 0.016; top: 50%; right: -2%; transform: translateY(-50%);
  pointer-events: none; user-select: none; z-index: 0;
}
.page-head > * { position: relative; z-index: 1; }
.page-title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(42px, 6vw, 84px); line-height: 0.94; letter-spacing: -0.035em;
  color: #fff; margin-bottom: 22px; text-wrap: balance; max-width: 14ch;
}
.page-title .green { color: var(--green); }
.page-sub { font-size: 18px; line-height: 1.6; color: var(--text-dim); max-width: 560px; font-weight: 500; }

/* ── Section heads ── */
.sec-head { max-width: 720px; margin-bottom: 52px; }
.sec-head .eyebrow { margin-bottom: 20px; }
.sec-title {
  font-family: var(--font-display); font-weight: 900;
  font-size: clamp(34px, 4.6vw, 58px); line-height: 0.96; letter-spacing: -0.035em;
  color: #fff; margin-bottom: 18px; text-wrap: balance;
}
.sec-title .green { color: var(--green); }
.sec-sub { font-size: 17px; line-height: 1.6; color: var(--text-dim); max-width: 560px; font-weight: 500; }

/* ── How it works steps ── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); }
.step { padding: 36px 30px 40px; border-right: 1px solid var(--line); position: relative; }
.step:last-child { border-right: none; }
.step-num { font-family: var(--font-display); font-weight: 900; font-size: 64px; line-height: 1; color: var(--surface-2); -webkit-text-stroke: 1px var(--line); letter-spacing: -0.04em; margin-bottom: 20px; }
.step:hover .step-num { color: var(--green); -webkit-text-stroke: 0; }
.step-title { font-family: var(--font-display); font-weight: 800; font-size: 21px; letter-spacing: -0.02em; color: #fff; margin-bottom: 10px; }
.step-desc { font-size: 14.5px; line-height: 1.55; color: var(--text-dim); font-weight: 500; margin-bottom: 16px; }
.step-time { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--green); }

/* ── Forms ── */
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 7px; }
.form-label { font-family: var(--font-mono); font-size: 10.5px; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-mute); }
.form-input, .form-textarea {
  background: var(--ink); border: 1px solid var(--line); border-radius: 10px;
  padding: 13px 15px; font-family: var(--font-body); font-size: 15px; color: var(--text);
  outline: none; transition: border-color 0.2s;
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-mute); }
.form-input:focus, .form-textarea:focus { border-color: var(--green); }
.form-textarea { min-height: 110px; resize: vertical; }
.form-success {
  display: none; padding: 14px; border-radius: 10px; text-align: center;
  background: rgba(74,222,128,0.1); border: 1px solid rgba(74,222,128,0.3);
  color: var(--green); font-size: 14px; font-weight: 600;
}
.form-success.show { display: block; }

/* ── Contact ── */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 48px; align-items: start; }
.contact-methods { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--line); }
.contact-card {
  display: flex; align-items: center; gap: 16px; padding: 22px 4px;
  border-bottom: 1px solid var(--line); text-decoration: none; color: inherit;
  transition: padding 0.22s, background 0.22s;
}
.contact-card:hover { padding-left: 14px; }
.contact-ico {
  width: 42px; height: 42px; border-radius: 11px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--line); color: var(--green);
}
.contact-card:hover .contact-ico { background: var(--green); color: #04140a; border-color: var(--green); }
.contact-card-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.contact-card-title { font-weight: 700; font-size: 15px; line-height: 1.3; color: #fff; }
.contact-card-sub { font-size: 13px; color: var(--text-mute); }
.contact-card .arr { margin-left: auto; color: var(--text-mute); transition: 0.22s; }
.contact-card:hover .arr { color: var(--green); transform: translateX(4px); }
.contact-form { display: flex; flex-direction: column; gap: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 28px; }

/* ── Card grid (articles, services) ── */
.card-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tile {
  display: flex; flex-direction: column; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--line); border-radius: 18px;
  padding: 30px; transition: border-color 0.25s, transform 0.25s, background 0.25s;
}
a.tile:hover { border-color: rgba(74,222,128,0.4); transform: translateY(-3px); background: var(--surface-2); }
.tile.featured {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, rgba(74,222,128,0.07), rgba(74,222,128,0.012));
  border-color: rgba(74,222,128,0.5);
}
.tile-cat { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--green); margin-bottom: 14px; }
.tile-title { font-family: var(--font-display); font-weight: 800; font-size: 21px; line-height: 1.15; letter-spacing: -0.02em; color: #fff; margin-bottom: 10px; }
.tile.featured .tile-title { font-size: 30px; }
.tile-excerpt { font-size: 14.5px; color: var(--text-dim); line-height: 1.55; flex: 1; margin-bottom: 18px; font-weight: 500; }
.tile-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.04em; color: var(--text-mute); }
.tile-read { color: var(--green); font-weight: 500; display: inline-flex; align-items: center; gap: 5px; }

/* ── Filter chips ── */
.filter-bar { display: flex; gap: 8px; margin-bottom: 36px; flex-wrap: wrap; }
.filter-btn {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.04em;
  padding: 9px 16px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--text-dim); cursor: pointer; transition: all 0.2s;
}
.filter-btn:hover { border-color: rgba(74,222,128,0.4); color: var(--text); }
.filter-btn.active { background: var(--green); border-color: var(--green); color: #04140a; }

/* ── FAQ accordion ── */
.faq-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); margin-top: 8px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 26px 4px; font-family: var(--font-display); font-weight: 700; font-size: 19px; letter-spacing: -0.02em; color: #fff;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-family: var(--font-mono); font-size: 24px; line-height: 1; color: var(--green); flex-shrink: 0; transition: transform 0.2s; }
.faq-item[open] summary::after { content: '–'; }
.faq-answer { font-size: 15.5px; line-height: 1.7; color: var(--text-dim); padding: 0 4px 26px; max-width: 760px; font-weight: 500; }
.faq-answer a { color: var(--green); text-decoration: underline; text-underline-offset: 2px; }

/* ── Prose (articles, privacy, terms) ── */
.prose { font-size: 16.5px; line-height: 1.8; color: #cdd0ca; font-weight: 450; }
.prose h2 { font-family: var(--font-display); font-weight: 800; font-size: 28px; color: #fff; margin: 44px 0 16px; letter-spacing: -0.025em; line-height: 1.1; }
.prose h3 { font-family: var(--font-display); font-weight: 700; font-size: 21px; color: #fff; margin: 34px 0 12px; letter-spacing: -0.02em; }
.prose p { margin-bottom: 18px; }
.prose ul, .prose ol { margin: 16px 0 20px; padding-left: 24px; }
.prose li { margin-bottom: 9px; }
.prose a { color: var(--green); text-decoration: underline; text-underline-offset: 2px; }
.prose strong { color: #fff; font-weight: 700; }
.prose blockquote { border-left: 2px solid var(--green); padding: 6px 0 6px 22px; margin: 22px 0; color: var(--text); font-size: 19px; font-weight: 500; line-height: 1.5; }
.prose img { max-width: 100%; border-radius: 14px; margin: 24px 0; display: block; border: 1px solid var(--line); }
.prose code { font-family: var(--font-mono); font-size: 14px; background: var(--surface); padding: 2px 7px; border-radius: 5px; color: var(--green); border: 1px solid var(--line); }
.prose pre { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; overflow-x: auto; margin: 22px 0; }
.prose pre code { background: none; border: none; padding: 0; color: #cdd0ca; }

/* ── Footer ── */
.site-footer { border-top: 1px solid var(--line); padding: 64px 0 40px; margin-top: 40px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid var(--line); }
.footer-brand-block .wordmark { font-size: 30px; margin-bottom: 16px; }
.footer-tagline { font-size: 14px; color: var(--text-dim); line-height: 1.6; max-width: 320px; }
.footer-col .footer-heading { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-mute); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; font-weight: 600; color: var(--text-dim); text-decoration: none; padding: 6px 0; transition: color 0.18s; }
.footer-col a:hover { color: var(--green); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 28px; flex-wrap: wrap; }
.footer-meta { font-family: var(--font-mono); font-size: 11px; color: var(--text-mute); letter-spacing: 0.04em; }
.footer-meta a { color: var(--text-mute); text-decoration: underline; }
.footer-socials { display: flex; gap: 10px; }
.footer-social {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface); border: 1px solid var(--line); color: var(--text-dim);
  text-decoration: none; transition: 0.2s;
}
.footer-social:hover { background: var(--green); color: #04140a; border-color: var(--green); transform: translateY(-2px); }

/* ── Mindmap self-assessment (shared) ── */
.mindmap { margin-top: 28px; }
.mm-hub { display: flex; justify-content: center; margin-bottom: 6px; }
.mm-hub span { font-family: var(--font-mono); font-size: 12px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: #04140a; background: var(--green); padding: 11px 20px; border-radius: 999px; position: relative; z-index: 3; }
.mm-tree { position: relative; padding: 10px 0; }
.mm-tree::before { content: ''; position: absolute; left: 50%; top: 42px; bottom: 42px; width: 2px; background: var(--line); transform: translateX(-50%); }
.mm-row { position: relative; display: grid; grid-template-columns: 1fr 1fr; margin-bottom: 18px; }
.mm-row:last-child { margin-bottom: 0; }
.mm-row::before { content: ''; position: absolute; left: 50%; top: 50%; width: 13px; height: 13px; border-radius: 50%; background: var(--ink); border: 2px solid var(--green); transform: translate(-50%, -50%); z-index: 2; }
.mm-node { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; max-width: 430px; position: relative; transition: border-color 0.2s, background 0.2s, transform 0.2s; }
.mm-node:hover { border-color: rgba(74,222,128,0.4); background: var(--surface-2); transform: translateY(-2px); }
.mm-row.left .mm-node { grid-column: 1; justify-self: end; margin-right: 48px; }
.mm-row.right .mm-node { grid-column: 2; justify-self: start; margin-left: 48px; }
.mm-row.left .mm-node::after { content: ''; position: absolute; right: -48px; top: 50%; width: 48px; height: 2px; background: var(--line); }
.mm-row.right .mm-node::after { content: ''; position: absolute; left: -48px; top: 50%; width: 48px; height: 2px; background: var(--line); }
.mm-q { font-weight: 700; font-size: 16px; color: #fff; line-height: 1.35; letter-spacing: -0.01em; }
.mm-a { margin-top: 9px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--green); display: flex; align-items: center; gap: 6px; }
.mm-cta { display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; margin-top: 32px; }
.mm-cta p { font-size: 16px; color: var(--text-dim); font-weight: 500; max-width: 520px; }

/* ── Responsive ── */
@media (max-width: 980px) {
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand-block { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  :root { --pad: 18px; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-right .btn { display: none; }
  .topnav.menu-open { flex-wrap: wrap; }
  .topnav.menu-open .nav-links {
    display: flex; flex-direction: column; align-items: stretch; width: 100%;
    order: 10; gap: 2px; padding-top: 12px; margin-top: 4px; border-top: 1px solid var(--line-soft);
  }
  .topnav.menu-open .nav-link { padding: 13px 8px; font-size: 16px; }
  .sec { padding: 68px 0; }
  .page-head { padding: 112px 0 4px; }
  .card-grid { grid-template-columns: 1fr; }
  .tile.featured { grid-column: auto; }
  .tile.featured .tile-title { font-size: 22px; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: none; border-bottom: 1px solid var(--line); }
  .step:last-child { border-bottom: none; }
  .form-row { grid-template-columns: 1fr; }
  .mm-tree::before { left: 7px; top: 24px; bottom: 24px; }
  .mm-row { grid-template-columns: 1fr; margin-bottom: 14px; }
  .mm-row::before { left: 7px; }
  .mm-row.left .mm-node, .mm-row.right .mm-node { grid-column: 1; justify-self: stretch; margin-left: 30px; margin-right: 0; max-width: none; }
  .mm-row.left .mm-node::after, .mm-row.right .mm-node::after { left: -30px; right: auto; width: 30px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto; } }