/* EXTUNI website — one stylesheet, mobile first. Colours match the company profile. */

:root {
  --navy: #0F2747;
  --navy-deep: #0A1C33;
  --accent: #12A39A;        /* bars, buttons, accents on navy */
  --accent-strong: #0B7A73; /* accent-coloured text on light backgrounds (AA contrast) */
  --accent-soft: #BDEBE6;
  --ink: #1F2933;
  --muted: #5B6B7F;
  --on-navy: #D6E2EE;
  --light: #F2F5F9;
  --line: #D9E0E8;
  --white: #FFFFFF;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 39, 71, .06), 0 10px 28px rgba(15, 39, 71, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --header-h: 64px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--accent-strong); text-underline-offset: 3px; }
h1, h2, h3, h4 { color: var(--navy); line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.3rem, 6.2vw, 4.1rem); letter-spacing: -.03em; line-height: 1.08; }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.6rem); letter-spacing: -.02em; }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
section[tabindex="-1"]:focus { outline: none; } /* focus moved here by an in-page link */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--white); color: var(--navy); padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { left: 12px; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 20px; }
@media (min-width: 768px) { .container { padding: 0 32px; } }

/* ---- Header ---------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .94);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: var(--header-h); }
.logo { font-weight: 800; font-size: 1.15rem; letter-spacing: .08em; color: var(--accent-strong); text-decoration: none; white-space: nowrap; }
.logo span { color: var(--navy); }
.site-nav { display: flex; align-items: center; gap: 2px; }
.site-nav a { color: var(--ink); text-decoration: none; font-weight: 500; padding: 8px 12px; border-radius: 8px; }
.site-nav a:hover { background: var(--light); }
.site-nav a.btn { color: var(--white); margin-left: 8px; }
.site-nav a.btn:hover { background: var(--accent-strong); }
.menu-toggle { display: none; }

@media (max-width: 899px) {
  .js .menu-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); cursor: pointer;
  }
  .menu-icon, .menu-icon::before, .menu-icon::after { display: block; width: 18px; height: 2px; background: var(--navy); border-radius: 2px; transition: transform .2s; }
  .menu-icon { position: relative; }
  .menu-icon::before, .menu-icon::after { content: ""; position: absolute; left: 0; }
  .menu-icon::before { top: -6px; }
  .menu-icon::after { top: 6px; }
  .menu-toggle[aria-expanded="true"] .menu-icon { background: transparent; }
  .menu-toggle[aria-expanded="true"] .menu-icon::before { transform: translateY(6px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-icon::after { transform: translateY(-6px) rotate(-45deg); }
  .js .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; align-items: stretch; gap: 4px;
    padding: 12px 20px 20px; background: var(--white); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .js .site-nav[data-open="true"] { display: flex; }
  .js .site-nav a { padding: 12px; font-size: 1.05rem; }
  .js .site-nav a.btn { margin: 8px 0 0; }
  .no-js .header-inner { flex-wrap: wrap; padding: 10px 0; }
  .no-js .site-nav { flex-wrap: wrap; }
}

/* ---- Buttons ----------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 0 22px; border-radius: 999px; border: 2px solid transparent;
  font-weight: 650; text-decoration: none; transition: background .15s, color .15s, border-color .15s;
}
.btn--primary { background: var(--accent); color: var(--navy); }
.btn--primary:hover { background: #19B8AE; }
.btn--ghost { border-color: rgba(255, 255, 255, .45); color: var(--white); }
.btn--ghost:hover { border-color: var(--white); background: rgba(255, 255, 255, .08); }
.btn--small { min-height: 40px; padding: 0 18px; background: var(--navy); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
@media (max-width: 520px) { .actions .btn { width: 100%; } }

/* ---- Hero ---------------------------------------------------------------------- */
.hero {
  color: var(--white);
  background: radial-gradient(900px 420px at 88% -10%, rgba(18, 163, 154, .30), transparent 62%), var(--navy);
  padding: clamp(56px, 10vw, 128px) 0 clamp(40px, 6vw, 72px);
}
.hero h1 { color: var(--white); max-width: 15ch; }
.hero-lead { font-size: clamp(1.05rem, 1.9vw, 1.3rem); color: var(--on-navy); max-width: 62ch; }
.hero-place { margin: 22px 0 0; font-size: .95rem; color: #B9C7D8; }
.eyebrow { font-size: .78rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--accent-strong); margin: 0 0 12px; }
.eyebrow--light { color: var(--accent-soft); }
.stats {
  list-style: none; margin: clamp(40px, 6vw, 64px) 0 0; padding: 28px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .16);
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px;
}
@media (max-width: 899px) { .stats li:last-child:nth-child(odd) { grid-column: 1 / -1; } }
@media (min-width: 900px) { .stats { grid-template-columns: repeat(5, minmax(0, 1fr)); } }
.stat-num { display: block; font-size: clamp(1.9rem, 3.6vw, 2.5rem); font-weight: 800; line-height: 1.1; color: var(--white); }
.stat-label { display: block; margin-top: 6px; font-size: .88rem; line-height: 1.45; color: #B9C7D8; }

/* ---- Sections ------------------------------------------------------------------ */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section--tint { background: var(--light); }
.section-head { max-width: 760px; margin-bottom: clamp(28px, 4vw, 48px); }
.lead { font-size: 1.15rem; color: var(--muted); }
.note { margin: 28px 0 0; color: var(--muted); font-size: .95rem; }
.subhead { margin-top: clamp(40px, 5vw, 64px); }
.grid { display: grid; gap: 20px; }

/* Services */
.grid--services { grid-template-columns: 1fr; }
@media (min-width: 720px) { .grid--services { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1040px) { .grid--services { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.card { position: relative; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px 26px; box-shadow: var(--shadow); }
.card::before { content: ""; position: absolute; left: 24px; right: 24px; top: -1px; height: 3px; background: var(--accent); border-radius: 0 0 3px 3px; }
.card-num { font-weight: 800; font-size: .85rem; letter-spacing: .1em; color: var(--accent-strong); margin-bottom: 6px; }
.card h3 { margin-bottom: 10px; }
.card > p { color: var(--muted); }
.card--featured { background: var(--navy); border-color: var(--navy); }
.card--featured h3 { color: var(--white); }
.card--featured > p, .card--featured li { color: var(--on-navy); }
.card--featured .card-num { color: var(--accent-soft); }
.ticks { list-style: none; padding: 0; margin: 14px 0 0; }
.ticks li { position: relative; padding-left: 24px; margin: 9px 0; font-size: .95rem; line-height: 1.5; }
.ticks li::before {
  content: ""; position: absolute; left: 2px; top: .42em; width: 11px; height: 6px;
  border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg);
}

/* Work */
.grid--cases { grid-template-columns: 1fr; }
@media (min-width: 860px) {
  .grid--cases { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case--featured { grid-column: 1 / -1; }
}
.case { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px 24px 18px; box-shadow: var(--shadow); }
.case-meta { font-size: .78rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.case h3 { font-size: 1.5rem; margin-bottom: 2px; }
.case-title { color: var(--accent-strong); font-weight: 650; margin-bottom: 14px; }
.case-outcome { margin-bottom: 8px; }
.tag {
  display: inline-block; margin-right: 6px; padding: 2px 9px; border-radius: 999px; vertical-align: 1px;
  background: var(--accent-soft); color: var(--navy); font-size: .7rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase;
}
details > summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; font-weight: 650; color: var(--navy); }
details > summary::-webkit-details-marker { display: none; }
details > summary::after { content: "+"; flex: none; font-size: 1.4rem; font-weight: 400; line-height: 1; color: var(--accent-strong); }
details[open] > summary::after { content: "−"; }
.case details { border-top: 1px solid var(--line); margin-top: 10px; }
.case dl { margin: 0 0 12px; }
.case dt { margin-top: 12px; font-size: .75rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-strong); }
.case dd { margin: 4px 0 0; }
.clients { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr; }
@media (min-width: 860px) { .clients { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 48px; } }
.clients li { display: grid; align-content: start; padding: 16px 0; border-top: 1px solid var(--line); }
.client-name { font-weight: 700; color: var(--navy); }
.client-note { font-size: .85rem; color: var(--muted); }
.client-desc { margin-top: 4px; }

/* Approach */
.grid--steps { grid-template-columns: 1fr; gap: 28px; }
@media (min-width: 860px) { .grid--steps { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.step { border-left: 3px solid var(--accent); padding: 2px 0 2px 20px; }
.step-num { font-weight: 800; letter-spacing: .1em; color: var(--accent-strong); margin-bottom: 4px; }
.step p { color: var(--muted); margin: 0; }

/* Why */
.reasons { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 860px) {
  .reasons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reasons li:last-child:nth-child(odd) { grid-column: 1 / -1; }
}
.reasons li { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.reasons h3 { font-size: 1.1rem; }
.reasons p { color: var(--muted); margin: 0; }

/* About */
.about { display: grid; gap: 32px; }
@media (min-width: 960px) { .about { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 56px; align-items: start; } }
.about-text > p { font-size: 1.06rem; }
.values { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.values li { padding-left: 16px; border-left: 3px solid var(--accent-soft); }
.founder { background: var(--navy); color: var(--on-navy); border-radius: var(--radius); padding: 30px 26px; }
.founder h3 { color: var(--white); font-size: 1.5rem; margin-bottom: 2px; }
.founder h4 { color: var(--white); font-size: 1rem; margin: 26px 0 8px; }
.founder strong { color: var(--white); }
.founder-role { color: var(--accent-soft); }
.founder-links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.founder-links a { color: var(--white); text-decoration: none; font-size: .9rem; padding: 7px 14px; border: 1px solid rgba(255, 255, 255, .35); border-radius: 999px; }
.founder-links a:hover { border-color: var(--white); background: rgba(255, 255, 255, .08); }
.small { font-size: .93rem; }
.small-list { padding-left: 18px; margin: 0; }
.small-list li { font-size: .9rem; margin: 8px 0; }

/* FAQ */
.faq { max-width: 880px; display: grid; gap: 12px; }
.faq details { background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 4px 20px; }
.faq summary { font-size: 1.05rem; padding: 12px 0; }
.faq details p { color: var(--muted); margin: 0 0 16px; }

/* Contact */
.contact { background: var(--navy); color: var(--white); }
.contact h2 { color: var(--white); max-width: 24ch; }
.contact-email { margin: 18px 0 0; font-size: clamp(1.25rem, 3vw, 1.8rem); font-weight: 700; overflow-wrap: anywhere; }
.contact-email a { color: var(--accent-soft); }

/* ---- Footer ------------------------------------------------------------------------ */
.site-footer { background: var(--navy-deep); color: #AFC0D3; padding: 40px 0 48px; font-size: .88rem; }
.site-footer a { color: var(--white); }
.footer-brand { color: var(--white); font-weight: 700; }
.footer-brand span { letter-spacing: .08em; }
.legal { max-width: 82ch; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 0; }

/* ---- Text pages (privacy, 404) ---------------------------------------------------------- */
.prose { max-width: 760px; }
.prose h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
.prose h2 { font-size: 1.3rem; margin-top: 1.6em; }