/* ============ TOKENS ============ */
  :root {
    --bg: #f4f2ee;
    --surface: #ffffff;
    --surface-2: #faf8f4;
    --ink: #14171c;
    --ink-soft: #3a3f47;
    --muted: #6a6f78;
    --line: #e4e0d8;
    --line-strong: #d6d1c7;
    --acc: oklch(0.52 0.16 256);
    --acc-press: oklch(0.45 0.16 256);
    --acc-tint: oklch(0.52 0.16 256 / 0.10);
    --acc-under: oklch(0.52 0.16 256 / 0.20);
    --dark: #14171c;
    --dark-2: #1b1f26;
    --on-dark: #e9eaec;
    --on-dark-mut: #9097a0;
    --radius: 14px;
    --radius-pill: 100px;
    --maxw: 1180px;
    --pad: clamp(20px, 5vw, 64px);
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Hanken Grotesk', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 90px; -webkit-text-size-adjust: 100%; }
  body {
    margin: 0; background: var(--bg); color: var(--ink);
    font-family: var(--font-body); font-size: 17px; line-height: 1.6;
    -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  }
  h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.02em; line-height: 1.05; margin: 0; text-wrap: balance; }
  p { margin: 0; text-wrap: pretty; }
  a { color: inherit; text-decoration: none; }
  ul { margin: 0; padding: 0; list-style: none; }
  img, svg { display: block; max-width: 100%; }
  ::selection { background: var(--acc); color: #fff; }


  .wrap { max-width: var(--maxw); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

  /* skip link */
  .skip { position: absolute; left: -9999px; top: 8px; background: var(--ink); color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 200; }
  .skip:focus { left: 12px; }

  /* focus visibility */
  a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
    outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 4px;
  }

  /* shared bits */
  .eyebrow { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--acc); display: inline-flex; align-items: center; gap: 12px; }
  .eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--acc); }
  .section { padding: clamp(64px, 9vw, 128px) 0; }
  .section-head { max-width: 760px; }
  .section-head h2 { font-size: clamp(30px, 4.6vw, 52px); margin-top: 22px; }
  .section-head .lede { color: var(--muted); font-size: clamp(16px, 1.5vw, 19px); margin-top: 20px; max-width: 60ch; }

  .btn { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-body); font-weight: 600; font-size: 15.5px; padding: 14px 26px; border-radius: var(--radius-pill); border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, background .2s ease, color .2s ease, border-color .2s ease; }
  .btn:active { transform: translateY(1px); }
  .btn-primary { background: var(--acc); color: #fff; }
  .btn-primary:hover { background: var(--acc-press); }
  .btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
  .btn-ghost:hover { border-color: var(--ink); }
  .btn-dark { background: var(--ink); color: #fff; }
  .btn-dark:hover { background: #000; }

  /* ============ HEADER ============ */
  .site-header {
    position: sticky; top: 0; z-index: 100;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: saturate(1.4) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .2s ease, background .2s ease;
  }
  .site-header.scrolled { border-bottom-color: var(--line); }
  .nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
  .brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 700; font-size: 18px; letter-spacing: 0.01em; }
  .brand .mark { width: 16px; height: 16px; border-radius: 4px; background: var(--acc); position: relative; }
  .brand .mark::after { content: ""; position: absolute; inset: 4px 4px auto auto; width: 6px; height: 6px; background: var(--bg); border-radius: 1px; }
  .nav-links { display: flex; gap: 30px; }
  .nav-links a { font-size: 15px; color: var(--ink-soft); transition: color .15s ease; }
  .nav-links a:hover { color: var(--acc); }
  .nav-right { display: flex; align-items: center; gap: 18px; }
  .lang-switch { display: inline-flex; align-items: center; gap: 2px; font-family: var(--font-mono); font-size: 13px; border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 3px; }
  .lang-switch button, .lang-switch a { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.04em; background: transparent; border: none; color: var(--muted); padding: 5px 11px; border-radius: var(--radius-pill); cursor: pointer; transition: background .15s, color .15s; }
  .lang-switch button[aria-pressed="true"], .lang-switch a[aria-current="page"] { background: var(--ink); color: #fff; }
  .lang-menu { position: relative; font-family: var(--font-mono); }
  .lang-menu > summary { list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; letter-spacing: 0.04em; color: var(--ink); border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 7px 12px; }
  .lang-menu > summary::-webkit-details-marker { display: none; }
  .lang-menu > summary:hover { border-color: var(--ink); }
  .lang-menu .chev { font-size: 10px; color: var(--muted); transition: transform .2s ease; }
  .lang-menu[open] .chev { transform: rotate(180deg); }
  .lang-pop { position: absolute; right: 0; top: calc(100% + 8px); margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 24px 48px -24px rgba(20,23,28,0.35); padding: 6px; min-width: 184px; display: grid; gap: 2px; z-index: 130; }
  .lang-pop a { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 9px 12px; border-radius: 8px; color: var(--ink-soft); font-family: var(--font-body); font-size: 14.5px; }
  .lang-pop a .lc { font-family: var(--font-mono); font-size: 11px; color: var(--muted); }
  .lang-pop a:hover { background: var(--surface-2); }
  .lang-pop a[aria-current="page"] { background: var(--ink); color: #fff; }
  .lang-pop a[aria-current="page"] .lc { color: rgba(255,255,255,0.6); }

  .menu-toggle { display: none; background: transparent; border: 1px solid var(--line-strong); border-radius: 10px; width: 42px; height: 42px; cursor: pointer; align-items: center; justify-content: center; }
  .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { content: ""; display: block; width: 18px; height: 2px; background: var(--ink); position: relative; }
  .menu-toggle span::before { position: absolute; top: -6px; }
  .menu-toggle span::after { position: absolute; top: 6px; }

  /* ============ HERO ============ */
  .hero { padding: clamp(48px, 8vw, 104px) 0 clamp(56px, 7vw, 96px); }
  .hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
  .hero h1 { font-size: clamp(40px, 6.4vw, 80px); margin-top: 26px; }
  .hero h1 .u { background: linear-gradient(transparent 62%, var(--acc-under) 0); padding: 0 0.04em; }
  .hero .sub { font-size: clamp(17px, 1.7vw, 21px); color: var(--ink-soft); margin-top: 26px; max-width: 52ch; }
  .hero-cta { display: flex; gap: 14px; margin-top: 36px; flex-wrap: wrap; }
  .engines { margin-top: 44px; padding-top: 26px; border-top: 1px solid var(--line); }
  .engines .lbl { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
  .engines .row { display: flex; flex-wrap: wrap; gap: 10px 12px; margin-top: 16px; }
  .engine-chip { font-family: var(--font-mono); font-size: 13px; color: var(--ink-soft); border: 1px solid var(--line-strong); background: var(--surface); padding: 7px 14px; border-radius: var(--radius-pill); }

  /* hero answer mock */
  .answer-card { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; padding: 22px 22px 20px; box-shadow: 0 30px 60px -34px rgba(20,23,28,0.28); position: relative; }
  .answer-card .ac-head { display: flex; align-items: center; gap: 10px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
  .answer-card .ac-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--acc); }
  .answer-card .ac-eng { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }
  .answer-card .ac-q { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); margin: 16px 0 10px; }
  .answer-card .ac-body { font-size: 15.5px; line-height: 1.6; color: var(--ink); }
  .answer-card .ac-body mark { background: var(--acc-tint); color: var(--ink); padding: 0 3px; border-radius: 3px; font-weight: 600; }
  .answer-card .ac-cite { display: inline-flex; align-items: center; gap: 7px; margin-top: 16px; font-family: var(--font-mono); font-size: 12px; color: var(--acc); background: var(--acc-tint); padding: 6px 11px; border-radius: var(--radius-pill); }
  .answer-card .ac-cite .num { width: 15px; height: 15px; border-radius: 50%; background: var(--acc); color: #fff; display: inline-grid; place-items: center; font-size: 10px; }
  .answer-card .ac-foot { margin-top: 18px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--line-strong); }

  /* ============ WHY (dark band) ============ */
  .why { background: var(--dark); color: var(--on-dark); }
  .why .eyebrow { color: oklch(0.7 0.13 256); }
  .why .eyebrow::before { background: oklch(0.7 0.13 256); }
  .why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
  .why h2 { color: #fff; font-size: clamp(28px, 4vw, 46px); margin-top: 22px; }
  .why h2 em { font-style: normal; color: oklch(0.74 0.14 256); }
  .why-points { display: grid; gap: 22px; }
  .why-point { display: grid; grid-template-columns: auto 1fr; gap: 18px; padding-bottom: 22px; border-bottom: 1px solid #2b303a; }
  .why-point:last-child { border-bottom: none; padding-bottom: 0; }
  .why-point .pn { font-family: var(--font-mono); font-size: 13px; color: oklch(0.7 0.13 256); padding-top: 3px; }
  .why-point h3 { font-size: 19px; color: #fff; }
  .why-point p { color: var(--on-dark-mut); font-size: 15.5px; margin-top: 8px; }

  /* ============ SERVICE GRID ============ */
  .svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 56px; }
  .svc-card { background: var(--surface); padding: 30px 28px 32px; display: flex; flex-direction: column; gap: 12px; transition: background .2s ease; }
  .svc-card:hover { background: var(--surface-2); }
  .svc-card .sc-top { display: flex; align-items: center; justify-content: space-between; }
  .svc-card .sc-num { font-family: var(--font-mono); font-size: 12.5px; color: var(--acc); }
  .svc-card .sc-tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--line-strong); }
  .svc-card h3 { font-size: 20px; margin-top: 6px; }
  .svc-card p { color: var(--muted); font-size: 15px; }
  .svc-card code { font-family: var(--font-mono); font-size: 13px; background: var(--acc-tint); color: var(--acc-press); padding: 1px 6px; border-radius: 5px; }

  /* ============ PROCESS ============ */
  .proc { background: var(--surface-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .proc-list { counter-reset: step; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 52px; }
  .proc-step { background: var(--surface); padding: 30px 30px 34px; display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; }
  .proc-step .pst-n { font-family: var(--font-display); font-weight: 600; font-size: 15px; color: var(--acc); border: 1px solid var(--acc); width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center; }
  .proc-step h3 { font-size: 20px; }
  .proc-step p { color: var(--muted); font-size: 15px; margin-top: 8px; }
  .proc-step .dur { font-family: var(--font-mono); font-size: 12px; color: var(--ink-soft); margin-top: 12px; display: inline-block; }

  /* ============ CASES ============ */
  .cases-note { display: inline-flex; align-items: center; gap: 9px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; color: var(--acc-press); background: var(--acc-tint); padding: 7px 13px; border-radius: var(--radius-pill); margin-top: 22px; }
  .cases-note::before { content: ""; width: 7px; height: 7px; border-radius: 2px; background: var(--acc); }
  .cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 52px; }
  .case { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 26px 30px; display: flex; flex-direction: column; }
  .case .badge { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); border: 1px solid var(--line-strong); border-radius: var(--radius-pill); padding: 5px 11px; align-self: flex-start; }
  .case h3 { font-size: 21px; margin-top: 18px; }
  .case .seg { font-family: var(--font-mono); font-size: 12.5px; color: var(--acc); margin-top: 6px; }
  .case .desc { color: var(--muted); font-size: 14.5px; margin-top: 14px; }
  .case .metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
  .case .metric .n { font-family: var(--font-display); font-weight: 600; font-size: 30px; letter-spacing: -0.02em; }
  .case .metric .l { font-size: 12px; color: var(--muted); margin-top: 4px; line-height: 1.35; }

  /* ============ ADVANTAGES ============ */
  .adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 52px; }
  .adv { display: grid; grid-template-columns: auto 1fr; gap: 18px; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
  .adv .ic { width: 40px; height: 40px; border-radius: 10px; background: var(--acc-tint); display: grid; place-items: center; font-family: var(--font-mono); font-size: 16px; color: var(--acc-press); font-weight: 600; }
  .adv h3 { font-size: 18px; }
  .adv p { color: var(--muted); font-size: 14.5px; margin-top: 7px; }

  /* ============ FAQ ============ */
  .faq-list { margin-top: 48px; border-top: 1px solid var(--line); }
  .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: 24px; padding: 26px 4px; font-family: var(--font-display); font-weight: 600; font-size: clamp(18px, 2vw, 22px); letter-spacing: -0.01em; }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item .pm { flex: none; width: 26px; height: 26px; position: relative; }
  .faq-item .pm::before, .faq-item .pm::after { content: ""; position: absolute; background: var(--acc); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
  .faq-item .pm::before { top: 12px; left: 4px; right: 4px; height: 2px; }
  .faq-item .pm::after { left: 12px; top: 4px; bottom: 4px; width: 2px; }
  .faq-item[open] .pm::after { transform: scaleY(0); opacity: 0; }
  .faq-item .ans { padding: 0 4px 28px; color: var(--ink-soft); font-size: 16.5px; max-width: 76ch; }

  /* ============ FORM / CONTACT ============ */
  .contact { background: var(--dark); color: var(--on-dark); }
  .contact .eyebrow { color: oklch(0.7 0.13 256); }
  .contact .eyebrow::before { background: oklch(0.7 0.13 256); }
  .contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(36px, 6vw, 84px); align-items: start; }
  .contact h2 { color: #fff; font-size: clamp(30px, 4.2vw, 48px); margin-top: 22px; }
  .contact .lede { color: var(--on-dark-mut); margin-top: 20px; font-size: 17px; max-width: 44ch; }
  .contact-meta { margin-top: 32px; display: grid; gap: 16px; }
  .contact-meta .cm-row { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: baseline; }
  .contact-meta .cm-k { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--on-dark-mut); }
  .contact-meta .cm-v { font-size: 16px; color: #fff; }
  .contact-meta a.cm-v { border-bottom: 1px solid #3a414c; }
  .contact-meta a.cm-v:hover { border-color: oklch(0.7 0.13 256); }

  .form { background: var(--dark-2); border: 1px solid #2b303a; border-radius: 18px; padding: clamp(22px, 3vw, 34px); }
  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .field { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
  .field label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--on-dark-mut); }
  .field label .req { color: oklch(0.74 0.14 256); }
  .field input, .field textarea {
    font-family: var(--font-body); font-size: 16px; color: #fff;
    background: #11151b; border: 1px solid #2f3640; border-radius: 10px;
    padding: 13px 14px; transition: border-color .15s ease, background .15s ease;
  }
  .field input::placeholder, .field textarea::placeholder { color: #5b6470; }
  .field input:focus, .field textarea:focus { outline: none; border-color: oklch(0.6 0.14 256); background: #141923; }
  .field textarea { resize: vertical; min-height: 110px; }
  .hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
  .form-submit { display: flex; align-items: center; gap: 16px; margin-top: 8px; flex-wrap: wrap; }
  .form-note { font-size: 12.5px; color: var(--on-dark-mut); }
  .form-status { font-size: 14.5px; margin-top: 16px; padding: 12px 14px; border-radius: 10px; display: none; }
  .form-status.show { display: block; }
  .form-status.ok { background: oklch(0.5 0.12 150 / 0.18); color: oklch(0.84 0.13 150); border: 1px solid oklch(0.5 0.12 150 / 0.4); }
  .form-status.err { background: oklch(0.55 0.16 25 / 0.16); color: oklch(0.82 0.13 25); border: 1px solid oklch(0.55 0.16 25 / 0.4); }
  .btn-submit { background: var(--acc); color: #fff; }
  .btn-submit:hover { background: var(--acc-press); }
  .btn-submit[disabled] { opacity: 0.6; cursor: progress; }

  /* ============ FOOTER ============ */
  .site-footer { background: #0e1116; color: var(--on-dark-mut); padding: 56px 0 40px; }
  .foot-grid { display: flex; align-items: flex-start; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
  .foot-brand { display: inline-flex; align-items: center; gap: 11px; font-family: var(--font-display); font-weight: 700; font-size: 18px; color: #fff; }
  .foot-brand .mark { width: 16px; height: 16px; border-radius: 4px; background: var(--acc); }
  .foot-tag { margin-top: 14px; max-width: 42ch; font-size: 14.5px; }
  .foot-nav { display: flex; gap: 60px; flex-wrap: wrap; }
  .foot-col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: #5b6470; font-weight: 500; margin-bottom: 14px; }
  .foot-col a, .foot-col span { display: block; font-size: 14.5px; color: var(--on-dark-mut); margin-bottom: 9px; transition: color .15s; }
  .foot-col a:hover { color: #fff; }
  .foot-bottom { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 24px; border-top: 1px solid #20262e; font-family: var(--font-mono); font-size: 12px; color: #5b6470; }

  /* ============ RESPONSIVE ============ */
  @media (max-width: 980px) {
    .hero-grid { grid-template-columns: 1fr; }
    .answer-card { max-width: 480px; }
    .why-grid, .contact-grid { grid-template-columns: 1fr; }
    .svc-grid, .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .proc-list, .adv-grid { grid-template-columns: 1fr; }
  }
  @media (max-width: 820px) {
    .nav-links { position: fixed; inset: 72px 0 auto 0; background: var(--bg); border-bottom: 1px solid var(--line); flex-direction: column; gap: 0; padding: 12px var(--pad) 22px; transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s; }
    .nav-links.open { opacity: 1; transform: none; pointer-events: auto; }
    .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 17px; }
    .menu-toggle { display: inline-flex; }
    .nav-right .header-cta { display: none; }
  }
  @media (max-width: 600px) {
    body { font-size: 16px; }
    .svc-grid, .cases-grid, .form-row { grid-template-columns: 1fr; }
    .case .metrics { grid-template-columns: 1fr 1fr; }
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; animation: none !important; }
  }