/* ==========================================================================
   Synon Global — Engineering Dossier UI (Vanilla CSS)
   Light technical paper · blueprint grid · ink type · mono metadata ·
   single vermilion annotation accent. See docs/DESIGN.md.
   ========================================================================== */

/* -------------------------------------------------------------------------- */
/* 1. Tokens                                                                   */
/* Design tokens are injected by @matrix/site-kit from theme.ts manifest      */
/* (see themeTokensCss). Override per-site via siteDefinition.themeOptions.    */
/* -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { line-height: 1.6; overflow-x: hidden; scroll-padding-top: 80px; }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
p { text-wrap: pretty; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--ink); color: var(--paper);
  padding: 10px 16px; border-radius: var(--r-2);
  font-size: 0.85rem; transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; }

/* -------------------------------------------------------------------------- */
/* 2. Utilities                                                                */
/* -------------------------------------------------------------------------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}
.u-accent { color: var(--accent); }
.u-mark {
  position: relative;
  white-space: nowrap;
}
.u-mark::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0.08em;
  height: 0.34em; background: var(--accent-soft); z-index: -1;
}

.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* Section-number spec label */
.label { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.label__no { font-size: 0.8rem; font-weight: 700; color: var(--accent); }
.label__tick { width: 28px; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.6s var(--ease) 0.15s; }
.reveal.is-visible .label__tick, .section__head.reveal.is-visible .label__tick { transform: scaleX(1); }
.label__txt { font-size: 0.72rem; font-weight: 500; letter-spacing: 0.14em; color: var(--muted); }

/* -------------------------------------------------------------------------- */
/* 3. Buttons                                                                  */
/* -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: var(--r-2);
  font-family: var(--font-display); font-weight: 600; font-size: 0.92rem;
  cursor: pointer; border: 1.5px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.12s ease;
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn--block { width: 100%; justify-content: center; }
@media (hover: hover) {
  .btn--primary:hover { background: var(--accent); }
  .btn--ghost:hover { border-color: var(--ink); background: var(--paper-2); }
}

/* -------------------------------------------------------------------------- */
/* 4. Navigation                                                               */
/* -------------------------------------------------------------------------- */
.nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: rgba(250, 249, 246, 0.9);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.nav.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 1px 0 var(--line-soft); }
.nav__inner {
  max-width: var(--container); margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo, .footer__logo { display: inline-flex; align-items: center; gap: 8px; }
.nav__logo-svg { width: 28px; height: 28px; color: var(--ink); flex-shrink: 0; }
.nav__logo-text { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; display: inline-flex; align-items: center; }
.nav__logo-mark { color: var(--accent); margin: 0 3px; font-weight: 400; opacity: 0.9; }

.nav__links { display: flex; align-items: center; gap: 26px; }
.nav__link {
  display: inline-flex; align-items: baseline; gap: 6px;
  font-size: 0.9rem; font-weight: 500; color: var(--ink-2);
  transition: color 0.15s ease;
}
.nav__link-idx { font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); }
.nav__link.is-active, .nav__link:hover { color: var(--accent); }
.nav__cta {
  padding: 9px 16px; border-radius: var(--r-2);
  background: var(--ink); color: var(--paper);
  font-family: var(--font-display); font-size: 0.85rem; font-weight: 600;
  transition: background-color 0.18s ease;
}
@media (hover: hover) { .nav__cta:hover { background: var(--accent); } }

.nav__toggle { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; align-items: center; justify-content: center; background: none; border: 1px solid var(--line); border-radius: var(--r-2); cursor: pointer; }
.nav__toggle span { width: 18px; height: 1.5px; background: var(--ink); transition: transform 0.2s ease, opacity 0.2s ease; }

/* -------------------------------------------------------------------------- */
/* 5. Hero                                                                     */
/* -------------------------------------------------------------------------- */
.hero { position: relative; padding: 150px 24px 90px; overflow: hidden; }
.hero__grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
}
.hero__inner {
  position: relative; z-index: 1;
  max-width: var(--container); margin: 0 auto;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center;
}
.hero__kicker { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 22px; }
.hero__title { font-size: 3.1rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 22px; }
.hero__lead { font-size: 1.12rem; color: var(--ink-2); max-width: 34em; margin-bottom: 32px; }
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Spec sheet panel — the hero's visual anchor */
.specsheet { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-2); box-shadow: 0 1px 0 var(--line-soft); }
.specsheet__head {
  display: flex; justify-content: space-between; gap: 10px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  font-size: 0.66rem; letter-spacing: 0.08em; color: var(--muted);
}
.specsheet__ref { color: var(--accent); }
.specsheet__flow { padding: 22px 18px; display: flex; flex-direction: column; gap: 0; }
.flow-node { border: 1px solid var(--line); border-radius: var(--r-2); padding: 14px 16px; background: var(--paper-2); }
.flow-node--target { background: var(--ink); border-color: var(--ink); }
.flow-node--target .flow-node__name { color: var(--paper); }
.flow-node--target .flow-node__sub { color: rgba(250, 249, 246, 0.6); }
.flow-node--target .flow-node__tag { color: var(--accent); }
.flow-node__tag { display: block; font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.1em; color: var(--muted); margin-bottom: 5px; }
.flow-node__name { display: block; font-family: var(--font-display); font-weight: 700; font-size: 1.02rem; }
.flow-node__sub { display: block; font-size: 0.66rem; color: var(--muted); margin-top: 3px; }
.flow-arrow { display: flex; align-items: center; gap: 12px; padding: 6px 0 6px 18px; }
.flow-arrow__line { flex: none; width: 2px; height: 24px; background: var(--accent); transform: scaleY(0); transform-origin: top; transition: transform 0.5s var(--ease) 0.2s; }
.reveal.is-visible .flow-arrow__line { transform: scaleY(1); }
.flow-arrow__label { font-size: 0.62rem; color: var(--accent); letter-spacing: 0.06em; }
.specsheet__stats { border-top: 1px solid var(--line); }
.stat { display: flex; justify-content: space-between; align-items: baseline; padding: 12px 16px; border-bottom: 1px solid var(--line-soft); }
.stat:last-child { border-bottom: none; }
.stat dt { font-size: 0.82rem; color: var(--muted); }
.stat dd { font-size: 1.15rem; font-weight: 700; color: var(--ink); }

/* -------------------------------------------------------------------------- */
/* 6. Section shell                                                            */
/* -------------------------------------------------------------------------- */
.section { max-width: var(--container); margin: 0 auto; padding: 84px 24px; }
.section__head { max-width: 640px; margin-bottom: 52px; }
.section__title { font-size: 2.1rem; margin-bottom: 14px; }
.section__lead { font-size: 1.05rem; color: var(--muted); }

/* -------------------------------------------------------------------------- */
/* 7. §01 FDE Steps                                                            */
/* -------------------------------------------------------------------------- */
.steps { border-top: 1px solid var(--line); }
.step {
  display: grid; grid-template-columns: 96px 1fr; gap: 24px;
  padding: 30px 0; border-bottom: 1px solid var(--line);
}
.step__num { font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.step__index { position: relative; }
.step__title { font-size: 1.3rem; margin-bottom: 8px; }
.step__desc { color: var(--ink-2); margin-bottom: 16px; max-width: 52em; }
.step__list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px 28px; }
.step__list li { font-size: 0.86rem; color: var(--muted); padding-left: 16px; position: relative; }
.step__list li::before { content: ''; position: absolute; left: 0; top: 0.6em; width: 6px; height: 1.5px; background: var(--accent); }

/* -------------------------------------------------------------------------- */
/* 8. §02 Teams                                                                */
/* -------------------------------------------------------------------------- */
.teams { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.team { border: 1px solid var(--line); border-radius: var(--r-2); padding: 32px; background: var(--paper); }
.team__head { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; padding-bottom: 20px; border-bottom: 1px solid var(--line-soft); }
.team__mark { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; flex-shrink: 0; background: var(--ink); color: var(--paper); border-radius: var(--r-2); font-size: 1.2rem; font-weight: 700; }
.team__name { font-size: 1.4rem; }
.team__role { font-size: 0.72rem; letter-spacing: 0.06em; color: var(--accent); margin-top: 2px; }
.team__desc { color: var(--ink-2); margin-bottom: 18px; }
.team__list li { font-size: 0.9rem; color: var(--muted); padding: 9px 0 9px 20px; border-top: 1px solid var(--line-soft); position: relative; }
.team__list li::before { content: '+'; position: absolute; left: 0; top: 8px; color: var(--accent); font-family: var(--font-mono); font-weight: 700; }

/* -------------------------------------------------------------------------- */
/* 9. §03 Cases                                                                */
/* -------------------------------------------------------------------------- */
.cases { display: flex; flex-direction: column; gap: 20px; }
.case { border: 1px solid var(--line); border-radius: var(--r-2); background: var(--paper); overflow: hidden; }
.case__meta {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 14px 32px; border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}
.case__ref { font-size: 0.72rem; font-weight: 700; color: var(--accent); }
.case__region { font-size: 0.72rem; color: var(--muted); }
.case__client { font-size: 0.82rem; color: var(--ink-2); margin-left: auto; }
.case__grid { display: grid; grid-template-columns: 1fr 1fr; }
.case__lead { padding: 32px; border-right: 1px solid var(--line); }
.case__title { font-size: 1.4rem; margin-bottom: 14px; line-height: 1.3; }
.case__desc { font-size: 0.92rem; color: var(--ink-2); margin-bottom: 20px; }
.case__list { border-top: 1px solid var(--line-soft); padding-top: 16px; }
.case__list li { font-size: 0.85rem; color: var(--muted); padding: 8px 0 8px 20px; position: relative; }
.case__list li::before { content: ''; position: absolute; left: 0; top: 0.8em; width: 7px; height: 7px; border: 1.5px solid var(--accent); }

.case__data { padding: 32px; background: var(--paper-2); }
.case__impact { padding-bottom: 20px; margin-bottom: 22px; border-bottom: 1px solid var(--line); }
.case__impact-label { display: block; font-size: 0.68rem; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 8px; }
.case__impact-val { font-family: var(--font-display); font-size: 1.12rem; font-weight: 700; color: var(--ink); line-height: 1.4; }

.charts { display: flex; flex-direction: column; gap: 26px; }
.chart__title { font-size: 0.86rem; font-weight: 600; color: var(--ink); margin-bottom: 12px; }
.chart__row { display: grid; grid-template-columns: 70px 1fr auto; align-items: center; gap: 12px; margin-bottom: 8px; }
.chart__key { font-size: 0.66rem; color: var(--muted); }
.chart__track { height: 12px; background: var(--paper-3); border-radius: var(--r-1); overflow: hidden; }
.chart__bar { display: block; height: 100%; transform: scaleX(0); transform-origin: left center; transition: transform 0.9s var(--ease) 0.1s; border-radius: var(--r-1); }
.chart__bar--legacy { background: repeating-linear-gradient(45deg, rgba(22,24,29,0.32), rgba(22,24,29,0.32) 4px, rgba(22,24,29,0.22) 4px, rgba(22,24,29,0.22) 8px); }
.chart__bar--synon { background: var(--accent); }
.reveal.is-visible .chart__bar { transform: scaleX(1); }
.chart__val { font-size: 0.78rem; font-weight: 700; color: var(--ink); min-width: 42px; text-align: right; }
.chart__delta { margin-top: 6px; font-size: 0.68rem; color: var(--accent); text-align: right; }

/* -------------------------------------------------------------------------- */
/* 10. §04 FAQ                                                                 */
/* -------------------------------------------------------------------------- */
.faqs { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.faq { border: 1px solid var(--line); border-radius: var(--r-2); padding: 28px; background: var(--paper); }
.faq__q { display: flex; gap: 10px; font-size: 1.05rem; margin-bottom: 12px; line-height: 1.4; }
.faq__q-no { color: var(--accent); font-size: 0.85rem; flex-shrink: 0; padding-top: 0.15em; }
.faq__a { font-size: 0.92rem; color: var(--ink-2); }

/* -------------------------------------------------------------------------- */
/* 11. §05 Apply                                                               */
/* -------------------------------------------------------------------------- */
.apply__inner { max-width: var(--container); margin: 0 auto; display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 48px; align-items: start; }
.apply__promise { margin-top: 28px; border-top: 1px solid var(--line); }
.apply__promise li { display: flex; gap: 14px; align-items: baseline; padding: 14px 0; border-bottom: 1px solid var(--line-soft); font-size: 0.92rem; color: var(--ink-2); }
.apply__promise .mono { color: var(--accent); font-size: 0.8rem; }
.apply__form { border: 1px solid var(--line); border-radius: var(--r-2); padding: 32px; background: var(--paper); display: flex; flex-direction: column; gap: 18px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label { font-size: 0.82rem; font-weight: 600; color: var(--ink-2); }
.field input, .field select, .field textarea {
  background: var(--paper); border: 1.5px solid var(--line); border-radius: var(--r-2);
  padding: 11px 14px; color: var(--ink); font-family: var(--font-body); font-size: 0.92rem;
  transition: border-color 0.15s ease; outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); }
.field select {
  cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%23c6431c'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; background-size: 15px; padding-right: 38px;
}
.form-status { padding: 11px 14px; border-radius: var(--r-2); font-size: 0.88rem; }
.form-status.is-info { background: var(--paper-2); color: var(--ink-2); border: 1px solid var(--line); }
.form-status.is-success { background: var(--accent-soft); color: var(--accent-ink); border: 1px solid rgba(198, 67, 28, 0.25); }

/* -------------------------------------------------------------------------- */
/* 12. Footer                                                                  */
/* -------------------------------------------------------------------------- */
.footer { border-top: 1px solid var(--line); background: var(--paper-2); padding: 64px 24px 32px; }
.footer__inner { max-width: var(--container); margin: 0 auto 44px; display: grid; grid-template-columns: 1.4fr 2fr; gap: 48px; }
.footer__logo { margin-bottom: 18px; }
.footer__desc { font-size: 0.86rem; color: var(--muted); max-width: 42em; margin-bottom: 20px; }
.footer__social { display: flex; gap: 18px; }
.footer__social a { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-2); }
.footer__social a:hover { color: var(--accent); }
.footer__columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer__col-title { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; color: var(--muted); text-transform: uppercase; margin-bottom: 16px; font-weight: 500; }
.footer__col-list li { margin-bottom: 10px; }
.footer__col-list a { font-size: 0.86rem; color: var(--ink-2); }
.footer__col-list a:hover { color: var(--accent); }
.footer__bottom { max-width: var(--container); margin: 0 auto; padding-top: 28px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer__contact, .footer__copyright { font-size: 0.78rem; color: var(--muted); }
.footer__copyright .mono { color: var(--ink-2); }

/* -------------------------------------------------------------------------- */
/* 13. 404                                                                     */
/* -------------------------------------------------------------------------- */
.notfound { min-height: 78vh; display: flex; align-items: center; justify-content: center; padding: 140px 24px; text-align: center; }
.notfound__inner { max-width: 520px; }
.notfound__code { font-size: 0.76rem; color: var(--accent); letter-spacing: 0.08em; margin-bottom: 20px; }
.notfound__title { font-size: 2rem; margin-bottom: 14px; }
.notfound__desc { color: var(--muted); margin-bottom: 28px; }
.notfound__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* -------------------------------------------------------------------------- */
/* 14. Responsive                                                              */
/* -------------------------------------------------------------------------- */
@media (max-width: 940px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__title { font-size: 2.6rem; }
  .teams, .faqs { grid-template-columns: 1fr; }
  .case__grid { grid-template-columns: 1fr; }
  .case__lead { border-right: none; border-bottom: 1px solid var(--line); }
  .apply__inner { grid-template-columns: 1fr; gap: 32px; }
  .step__list { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed; inset: 60px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px; transform: translateY(-12px); opacity: 0;
    pointer-events: none; transition: opacity 0.2s ease, transform 0.2s ease;
  }
  body.nav-open .nav__links { transform: none; opacity: 1; pointer-events: auto; }
  body.nav-open .nav__toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  body.nav-open .nav__toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav__toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
  .nav__link { padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
  .nav__cta { margin-top: 14px; text-align: center; justify-content: center; display: flex; }

  .section { padding: 60px 20px; }
  .hero { padding: 116px 20px 64px; }
  .hero__title { font-size: 2.1rem; }
  .step { grid-template-columns: 1fr; gap: 10px; }
  .step__list { grid-template-columns: 1fr; }
  .case__meta { padding: 14px 20px; }
  .case__lead, .case__data { padding: 24px 20px; }
  .case__client { margin-left: 0; width: 100%; }
  .field-row { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 32px; }
  .footer__columns { grid-template-columns: 1fr 1fr; }
}

/* -------------------------------------------------------------------------- */
/* 15. Reduced motion                                                          */
/* -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .label__tick, .flow-arrow__line, .chart__bar { transform: none !important; transition: none !important; }
}