/* Epoch Digital Solutions — editorial / Swiss layout
   Vanilla CSS, no build step. Sections:
   1. Fonts   2. Reset & tokens   3. Base & a11y   4. Header / nav
   5. Hero    6. About            7. Work         8. Capabilities
   9. Contact 10. Footer          11. Utility pages (404, privacy)
   12. Responsive
*/

/* 1. Fonts --------------------------------------------------------------- */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
}
/* Metric-matched fallback so swapping to Inter doesn't shift layout. */
@font-face {
  font-family: "Inter Fallback";
  src: local("Arial");
  ascent-override: 90%;
  descent-override: 22.43%;
  line-gap-override: 0%;
  size-adjust: 107.12%;
}

/* 2. Reset & tokens ---------------------------------------------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --ink: #111;
  --paper: #fff;
  --soft: #f4f4f2;
  --line: #ddd;
  --line-soft: #e9e9e9;
  --muted: #5b5b5b;          /* body text on light — ~6.8:1 on #fff */
  --muted-dim: #666;         /* small labels on light — ~5.7:1 on #fff */
  --on-dark: #b0b0b0;        /* body text on #111 — ~8.7:1 */
  --on-dark-dim: #8a8a8a;    /* small labels on #111 — ~5.5:1 */
  --focus: #111;
  --maxw: 1180px;
}

/* 3. Base & a11y ------------------------------------------------------- */
html { scroll-behavior: smooth; }

body {
  font-family: "Inter", "Inter Fallback", Arial, Helvetica, sans-serif;
  font-optical-sizing: auto;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }

.container { width: min(var(--maxw), 90%); margin-inline: auto; }

section[id] { scroll-margin-top: 92px; }

img { max-width: 100%; height: auto; display: block; }

/* Visible keyboard focus — brand-matched, never removed without a replacement */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}
:focus:not(:focus-visible) { outline: none; }
.on-dark :focus-visible,
.project-large:focus-visible { outline-color: #fff; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 60;
  background: var(--ink);
  color: #fff;
  padding: 11px 18px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .04em;
  transition: top .18s ease;
}
.skip-link:focus { top: 16px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}

/* 4. Header / nav ---------------------------------------------------------- */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-container {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .13em;
  white-space: nowrap;
}
.logo strong { font-weight: 800; }
.nav-links { display: flex; gap: 34px; font-size: .88rem; }
.nav-links a { transition: opacity .2s; }
.nav-links a:hover { opacity: .45; }

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-right: -8px;
  border: 0;
  background: none;
  cursor: pointer;
}
.menu-toggle-bars,
.menu-toggle-bars::before,
.menu-toggle-bars::after {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform .22s ease, opacity .22s ease;
}
.menu-toggle-bars { position: relative; margin: 0 auto; }
.menu-toggle-bars::before,
.menu-toggle-bars::after { content: ""; position: absolute; left: 0; }
.menu-toggle-bars::before { top: -7px; }
.menu-toggle-bars::after { top: 7px; }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars { background: transparent; }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars::before { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle-bars::after { transform: translateY(-7px) rotate(-45deg); }

/* 5. Hero --------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  padding-top: 78px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #fff 0%, var(--soft) 100%);
}
.hero-inner { position: relative; z-index: 2; padding: 110px 0; }

.eyebrow {
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .18em;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(3.4rem, 8.5vw, 8.5rem);
  line-height: .88;
  letter-spacing: -.055em;
  max-width: 1000px;
}
.hero h1 span { font-weight: 400; }

.hero-copy {
  font-size: 1.16rem;
  color: var(--muted);
  max-width: 620px;
  margin: 38px 0;
}

.button {
  display: inline-flex;
  gap: 18px;
  align-items: center;
  padding: 15px 24px;
  font-size: .9rem;
  font-weight: 700;
  transition: transform .2s, background .2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink); color: #fff; }
.button-ghost { border: 1px solid var(--ink); color: var(--ink); }
.button-ghost:hover { background: var(--ink); color: #fff; }
.button .arrow { transition: transform .2s; }
.button:hover .arrow { transform: translateX(4px); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0 40px;
  list-style: none;
  margin-top: 60px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  max-width: 620px;
  font-size: .84rem;
}
.hero-facts li { padding: 5px 0; }
.hero-facts span {
  display: block;
  font-size: .64rem;
  font-weight: 800;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 3px;
}

.hero-grid {
  position: absolute;
  right: -12%;
  bottom: -35%;
  width: 65vw;
  height: 65vw;
  border: 1px solid var(--line);
  transform: rotate(45deg);
  opacity: .45;
}

/* 6. About ------------------------------------------------------------- */
.section { padding: 125px 0; }

h2 {
  font-size: clamp(2.4rem, 5vw, 5.2rem);
  line-height: .95;
  letter-spacing: -.05em;
}

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }

.section-copy { font-size: 1.12rem; color: var(--muted); max-width: 620px; }
.section-copy p + p { margin-top: 22px; }

/* Label / value rows — used in About and Contact */
.fact-list { margin-top: 38px; border-top: 1px solid var(--line); }
.fact-list > div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 20px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.fact-list dt {
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted-dim);
  padding-top: 2px;
}
.fact-list dd { font-size: .9rem; overflow-wrap: anywhere; }
.fact-list dd a { border-bottom: 1px solid var(--line); }
.fact-list dd a:hover { border-color: var(--ink); }

/* How an engagement works */
.engagement { margin-top: 90px; padding-top: 40px; border-top: 1px solid var(--line); }
.engagement-title {
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 44px;
}
.engagement-steps { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 50px; }
.engagement-steps .step-num {
  display: block;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .12em;
  color: var(--muted-dim);
  margin-bottom: 16px;
}
.engagement-steps h4 { font-size: 1.22rem; letter-spacing: -.02em; margin-bottom: 10px; }
.engagement-steps p { color: var(--muted); font-size: .95rem; }

/* 7. Work ------------------------------------------------------------- */
.work { background: var(--soft); }

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 50px;
  margin-bottom: 60px;
}
.section-header > p { max-width: 380px; color: var(--muted-dim); }

.project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.project {
  min-height: 300px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 30px;
}
a.project { transition: transform .3s, box-shadow .3s; }
a.project:hover { transform: translateY(-5px); box-shadow: 0 18px 45px rgba(0, 0, 0, .08); }

.project:not(.project-large) .project-content {
  display: flex;
  flex-direction: column;
  flex: 1;
}
.project:not(.project-large) .project-link,
.project:not(.project-large) .project-note { margin-top: auto; padding-top: 26px; }

.project-large {
  grid-column: 1 / -1;
  min-height: 460px;
  background: var(--ink);
  color: #fff;
  justify-content: space-between;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .13em;
}

.project-kicker {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted-dim);
  margin-bottom: 14px;
}
.project-large .project-kicker { color: #a8a8a8; }

.project h3 {
  font-size: clamp(1.9rem, 3.4vw, 2.5rem);
  line-height: .95;
  letter-spacing: -.04em;
  margin-bottom: 18px;
}
.project-large h3 {
  font-size: clamp(3rem, 6vw, 5rem);
  line-height: .9;
  letter-spacing: -.05em;
  margin-bottom: 22px;
}
.project p { color: var(--muted); font-size: .96rem; }
.project-large p { color: var(--on-dark); font-size: 1.05rem; max-width: 620px; }

.project-content { max-width: 640px; }

.project-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 20px;
}
.project-tags li {
  border: 1px solid var(--line);
  padding: 4px 9px;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--muted-dim);
  white-space: nowrap;
}
.project-large .project-tags li { border-color: #3a3a3a; color: #a8a8a8; }

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .02em;
}
a.project:hover .project-link .arrow-ne { transform: translate(2px, -2px); }
.project-link .arrow-ne { transition: transform .2s; }

.project-note {
  margin-top: 26px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--muted-dim);
}

/* 8. Capabilities ---------------------------------------------------------- */
.capabilities { background: var(--ink); color: #fff; }
.capabilities > .container > h2 { margin-bottom: 28px; }
.capabilities-lead {
  color: var(--on-dark);
  font-size: 1.08rem;
  max-width: 620px;
  margin-bottom: 66px;
}
.capability-grid .capability-detail {
  margin-top: 12px;
  font-size: .78rem;
  letter-spacing: .02em;
  color: var(--on-dark-dim);
}

.capability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid #333;
}
.capability-grid > div { padding: 35px 0; border-bottom: 1px solid #333; }
.capability-grid > div:nth-child(odd) { padding-right: 50px; border-right: 1px solid #333; }
.capability-grid > div:nth-child(even) { padding-left: 50px; }
.capability-grid span { font-size: .7rem; color: var(--on-dark-dim); }
.capability-grid h3 { font-size: 1.5rem; margin: 32px 0 12px; letter-spacing: -.02em; }
.capability-grid p { color: var(--on-dark); max-width: 460px; }

/* 9. Contact -------------------------------------------------------------- */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: start;
}
.contact-lead h2 { margin-bottom: 26px; }
.contact-lead p { color: var(--muted); font-size: 1.08rem; max-width: 470px; }
.contact-lead .contact-help { font-size: .95rem; margin-top: 16px; }
.contact-details { margin-top: 40px; }

.contact-form { display: flex; flex-direction: column; gap: 22px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.field input,
.field textarea {
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 13px 14px;
  border-radius: 0;
  transition: border-color .18s;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:hover,
.field textarea:hover { border-color: #bcbcbc; }
.field input:focus,
.field textarea:focus { border-color: var(--ink); }
.contact-form :focus-visible { outline-offset: 2px; }

.contact-form .button { align-self: flex-start; border: 0; cursor: pointer; }
.contact-form .button[disabled] { opacity: .55; cursor: default; transform: none; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status {
  font-size: .9rem;
  line-height: 1.5;
  padding: 12px 14px;
  border: 1px solid var(--line);
}
.form-status--ok { border-color: #1b6b2e; color: #1b6b2e; }
.form-status--error { border-color: #a12626; color: #a12626; }

.contact-consent {
  font-size: .78rem;
  color: var(--muted-dim);
  line-height: 1.55;
}
.contact-consent a { border-bottom: 1px solid var(--line); }
.contact-consent a:hover { border-color: var(--ink); }

/* 10. Footer -------------------------------------------------------------- */
.footer { background: var(--soft); border-top: 1px solid var(--line); padding: 55px 0 26px; }
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 46px;
}
.footer-brand { max-width: 320px; }
.footer-tagline { color: var(--muted-dim); font-size: .82rem; line-height: 1.55; margin-top: 16px; }
.footer-cols { display: flex; gap: 60px; }
.footer-col-title {
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 14px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; font-size: .85rem; }
.footer-links a:hover { opacity: .5; }
.footer-contact { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.footer-contact a,
.footer-contact span { font-size: .85rem; overflow-wrap: anywhere; }
.footer-contact a { border-bottom: 1px solid var(--line); }
.footer-contact a:hover { border-color: var(--ink); }
.footer-contact span { color: var(--muted-dim); }

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-bottom p { font-size: .72rem; color: var(--muted-dim); }

/* 11. Utility pages (404, privacy) -------------------------------------- */
.page {
  min-height: 100vh;
  padding: 160px 0 100px;
  display: flex;
  align-items: center;
}
.page-narrow { max-width: 720px; }
.page h1 {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: .95;
  letter-spacing: -.05em;
  margin-bottom: 26px;
}
.page h2 {
  font-size: 1.15rem;
  letter-spacing: 0;
  line-height: 1.4;
  margin: 40px 0 10px;
}
.page p { color: var(--muted); margin-bottom: 16px; max-width: 640px; }
.page a.inline { border-bottom: 1px solid var(--line); font-weight: 600; }
.page a.inline:hover { border-color: var(--ink); }
.page .back { margin-top: 40px; display: inline-flex; gap: 10px; align-items: center; font-weight: 700; font-size: .9rem; }
.page ul { color: var(--muted); margin: 0 0 16px 20px; max-width: 640px; }
.page li { margin-bottom: 8px; }
.page .updated { font-size: .8rem; color: var(--muted-dim); letter-spacing: .02em; }

/* 12. Responsive ------------------------------------------------------- */
@media (max-width: 940px) {
  .split { gap: 60px; }
  .contact-inner { gap: 60px; }
  .project-grid { grid-template-columns: 1fr 1fr; }
  .engagement-steps { grid-template-columns: 1fr; gap: 36px; }
  .engagement { margin-top: 64px; }
}

@media (max-width: 760px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 78px;
    left: 0;
    width: 100%;
    padding: 22px 5% 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 18px;
    font-size: 1rem;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }

  .section { padding: 84px 0; }
  .hero-inner { padding: 96px 0; }
  .hero h1 { font-size: clamp(2.55rem, 11vw, 4.2rem); }

  .split,
  .project-grid,
  .capability-grid,
  .contact-inner { grid-template-columns: 1fr; }

  .split { gap: 34px; }
  .project-large { grid-column: auto; min-height: 380px; }
  .project { min-height: 260px; gap: 32px; }

  .section-header { display: block; }
  .section-header > p { margin-top: 22px; }

  .capability-grid > div:nth-child(odd) { padding-right: 0; border-right: 0; }
  .capability-grid > div:nth-child(even) { padding-left: 0; }

  .contact-inner { gap: 44px; }

  .footer-top { display: block; }
  .footer-brand { max-width: none; }
  .footer-cols { margin-top: 40px; gap: 36px; flex-wrap: wrap; }
  .footer-cols > div { min-width: 140px; }

  .logo { font-size: .68rem; letter-spacing: .11em; }
  .hero-facts { margin-top: 46px; gap: 0 30px; }
  .fact-list > div { grid-template-columns: 1fr; gap: 4px; }
  .engagement-title { margin-bottom: 32px; }
  .contact-details { margin-top: 32px; }
}