/* AMP Optics — 2026 refresh
   Space Grotesk headings / Inter body, dark hero, light content pages. */

:root {
  --ink: #0d1b26;        /* near-black navy — headers, footer, hero base */
  --ink-soft: #22384a;
  --paper: #ffffff;
  --paper-alt: #f4f7f9;
  --body: #33444f;
  --muted: #64757f;
  --accent: #1470a6;     /* heritage blue, refined */
  --accent-dark: #0e5580;
  --amber: #e3a13f;      /* sunset accent, used sparingly */
  --line: #e2e8ec;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  font-weight: 400;
  font-size: 17px;
  color: var(--body);
  background: var(--paper);
  line-height: 1.7;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

h1, h2, h3, .wordmark {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  color: var(--ink);
  line-height: 1.2;
}

/* ---------- Header / nav ---------- */

header {
  background: var(--ink);
  padding: 0 clamp(20px, 5vw, 56px);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding: 20px 0;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  white-space: nowrap;
  color: #fff;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.wordmark img {
  height: 48px;
  width: auto;
  display: block;
}

.wordmark span { color: var(--amber); }

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 26px;
}

nav a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

nav a:hover { color: #fff; }
nav a.active { color: #fff; border-bottom-color: var(--amber); }

/* ---------- Hero (homepage) ---------- */

.hero {
  background:
    linear-gradient(180deg, rgba(13, 27, 38, 0.78) 0%, rgba(13, 27, 38, 0.55) 55%, rgba(13, 27, 38, 0.82) 100%),
    url('hero.jpg') center 35% / cover no-repeat;
  padding: clamp(90px, 14vw, 170px) clamp(20px, 5vw, 56px);
}

.hero-inner { max-width: 1100px; margin: 0 auto; }

.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5.2vw, 58px);
  font-weight: 600;
  max-width: 17em;
  letter-spacing: -0.5px;
}

.hero h1 em {
  font-style: normal;
  color: var(--amber);
}

.hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: clamp(17px, 2vw, 20px);
  max-width: 36em;
  margin-top: 22px;
}

.hero-cta { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 14px; }

.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary { background: var(--accent); color: #fff; border: 1px solid var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, 0.55); }
.btn-ghost:hover { border-color: #fff; }

/* ---------- Sections ---------- */

section { padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 56px); }

.section-inner { max-width: 1100px; margin: 0 auto; }

.section-alt { background: var(--paper-alt); }

.kicker {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

section h2 {
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: -0.3px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 22px;
  margin-top: 40px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: 6px;
  padding: 26px 24px;
}

.card h3 { font-size: 19px; font-weight: 600; margin-bottom: 10px; }

.card p { font-size: 15.5px; color: var(--body); }

.card .tools {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

/* Credibility strip */

.strip {
  background: var(--ink);
  padding: clamp(40px, 6vw, 64px) clamp(20px, 5vw, 56px);
}

.strip .section-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
  text-align: center;
}

.strip .stat b {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 26px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.strip .stat {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14.5px;
}

.strip a.stat { text-decoration: none; transition: color 0.15s ease; }
.strip a.stat:hover { color: rgba(255, 255, 255, 0.9); }
.strip a.stat:hover b { text-decoration: underline; text-underline-offset: 4px; }

/* CTA band */

.cta-band { text-align: center; }

.cta-band p { max-width: 34em; margin: 0 auto 30px; }

/* ---------- Content pages ---------- */

.page-head {
  background: var(--ink);
  padding: clamp(44px, 7vw, 80px) clamp(20px, 5vw, 56px);
}

.page-head .section-inner { max-width: 820px; }

.contact-head .section-inner {
  max-width: 1000px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.contact-head .head-text { max-width: 38em; }

.contact-head .head-art { flex: 0 0 auto; }

.contact-head .head-art svg { display: block; width: 220px; height: auto; }

@media (max-width: 720px) {
  .contact-head .head-art { display: none; }
}

.page-head h1 {
  color: #fff;
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 600;
  letter-spacing: -0.4px;
}

.page-head p {
  color: rgba(255, 255, 255, 0.75);
  margin-top: 12px;
  max-width: 38em;
}

main.content {
  flex: 1;
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: clamp(44px, 6vw, 72px) 24px;
}

main.content h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 40px 0 14px;
}

main.content h2:first-child { margin-top: 0; }

main.content p { margin-bottom: 18px; }

main.content ul { margin: 0 0 18px 22px; }

main.content li { margin-bottom: 9px; }

main.content a { color: var(--accent); text-underline-offset: 3px; }
main.content a:hover { color: var(--accent-dark); }

blockquote {
  margin: 34px 0;
  padding: 24px 28px;
  background: var(--paper-alt);
  border-left: 4px solid var(--amber);
  border-radius: 0 6px 6px 0;
}

blockquote p {
  font-size: 18px;
  font-style: italic;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

blockquote cite {
  font-style: normal;
  font-size: 14.5px;
  color: var(--muted);
}

/* Services */

.svc { margin-bottom: 36px; }

.svc h2 { margin-bottom: 8px; }

.svc .tools { font-size: 14px; color: var(--muted); margin-top: 6px; }

.brochures {
  margin-top: 44px;
  padding: 22px;
  background: var(--paper-alt);
  border: 1px solid var(--line);
  border-radius: 6px;
  text-align: center;
}

/* Publications */

.pub-list { list-style: none; margin-left: 0 !important; }

.pub-list li {
  border-left: 3px solid var(--accent);
  padding: 2px 0 2px 18px;
  margin-bottom: 22px;
}

.pub-list li a { text-decoration: none; }
.pub-list li a:hover { text-decoration: underline; }

.pub-year {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 2px;
}

/* ---------- Contact form ---------- */

form { max-width: 560px; }

.field { margin-bottom: 22px; }

.field-row { display: flex; gap: 16px; }

.field-row .field { flex: 1; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.4px;
  margin-bottom: 6px;
  color: var(--ink);
}

label .req { color: var(--muted); font-weight: 400; }

input, textarea {
  width: 100%;
  padding: 11px 13px;
  font-family: inherit;
  font-size: 16px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #c6d0d7;
  border-radius: 4px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20, 112, 166, 0.15);
}

textarea { min-height: 150px; resize: vertical; }

button {
  padding: 13px 38px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover { background: var(--accent-dark); }

.form-status { margin-top: 16px; min-height: 1.5em; color: var(--ink); font-weight: 500; }

/* ---------- Footer ---------- */

footer {
  background: var(--ink);
  margin-top: auto;
  padding: 34px clamp(20px, 5vw, 56px);
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.6);
}

footer a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

footer a:hover { color: #fff; text-decoration: underline; }

@media (max-width: 560px) {
  .field-row { flex-direction: column; gap: 0; }
  .header-inner { justify-content: center; }
  nav { justify-content: center; }
  .footer-inner { justify-content: center; text-align: center; }
}