/* ==========================================================================
   Hise Scientific Instrumentation — site stylesheet
   No frameworks, no JavaScript required.
   ========================================================================== */

:root {
  --green-900: #14331f;
  --green-800: #1b4332;
  --green-700: #2d6a4f;
  --green-600: #40916c;
  --green-100: #d8f3dc;
  --green-50:  #eef7f0;
  --amber:     #b97a1f;
  --ink:       #21302a;
  --ink-soft:  #4c5b54;
  --paper:     #fbfaf7;
  --card:      #ffffff;
  --line:      #dfe6e1;
  --radius:    10px;
  --shadow:    0 2px 10px rgba(20, 51, 31, 0.08);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

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

a { color: var(--green-700); }
a:hover { color: var(--green-600); }

.wrap {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --------------------------------------------------------------------------
   Header & navigation (pure CSS, checkbox-toggled on mobile)
   -------------------------------------------------------------------------- */

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; padding: 0.6rem 0; }
.brand img { height: 34px; width: auto; }

.nav-toggle-input { display: none; }

.nav-toggle {
  display: none;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.4rem 0.65rem;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--green-800);
  user-select: none;
}

.site-nav ul { list-style: none; margin: 0; padding: 0; }

.site-nav > ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  display: block;
  padding: 0.55rem 0.8rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
  border-radius: 6px;
  white-space: nowrap;
}

.site-nav a:hover { background: var(--green-50); color: var(--green-800); }

.site-nav a[aria-current="page"] {
  color: var(--green-800);
  background: var(--green-100);
}

/* Dropdowns */
.has-sub { position: relative; }

.has-sub > a::after {
  content: " ▾";
  font-size: 0.7em;
  color: var(--ink-soft);
}

.sub {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 0.35rem;
  display: none;
}

.has-sub:hover > .sub,
.has-sub:focus-within > .sub { display: block; }

.sub .group-label {
  display: block;
  padding: 0.5rem 0.8rem 0.15rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

/* Mobile nav */
@media (max-width: 820px) {
  .nav-toggle { display: block; }

  .site-nav {
    display: none;
    width: 100%;
    padding-bottom: 0.75rem;
  }

  .nav-toggle-input:checked ~ .site-nav { display: block; }

  .site-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }

  .sub {
    display: block;
    position: static;
    border: none;
    box-shadow: none;
    padding: 0 0 0 1rem;
    min-width: 0;
  }
}

/* --------------------------------------------------------------------------
   Hero / page banners
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  color: #fff;
  background: var(--green-900);
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15, 38, 23, 0.85) 25%, rgba(15, 38, 23, 0.45));
}

.hero .wrap {
  position: relative;
  padding-top: 5rem;
  padding-bottom: 5rem;
  max-width: 1060px;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.9rem, 4.5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.hero p {
  margin: 0;
  max-width: 34em;
  font-size: 1.15rem;
  color: #e7efe9;
}

.hero .actions { margin-top: 1.75rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

.page-banner {
  color: #fff;
  background: var(--green-900);
  background-size: cover;
  background-position: center;
  position: relative;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 38, 23, 0.72);
}

.page-banner .wrap { position: relative; padding-top: 2.75rem; padding-bottom: 2.75rem; }

.page-banner h1 { margin: 0; font-size: clamp(1.6rem, 3.5vw, 2.3rem); }

.page-banner .crumb {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-100);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-block;
  padding: 0.65rem 1.3rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn-primary { background: var(--green-600); color: #fff; }
.btn-primary:hover { background: var(--green-700); color: #fff; }

.btn-ghost { border-color: rgba(255, 255, 255, 0.7); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); color: #fff; }

.btn-outline { border-color: var(--green-600); color: var(--green-700); }
.btn-outline:hover { background: var(--green-50); }

/* --------------------------------------------------------------------------
   Main content
   -------------------------------------------------------------------------- */

main { padding: 3rem 0 4rem; }

main h2 {
  font-size: 1.55rem;
  margin: 2.5rem 0 0.75rem;
  color: var(--green-800);
  letter-spacing: -0.01em;
}

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

main h3 { color: var(--green-800); margin: 1.75rem 0 0.5rem; }

.lead { font-size: 1.15rem; color: var(--ink-soft); max-width: 46em; }

.section { margin-bottom: 3rem; }

.two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 820px) {
  .two-col { grid-template-columns: 1fr; }
}

.check-list { list-style: none; padding: 0; margin: 1rem 0; }

.check-list li {
  padding: 0.35rem 0 0.35rem 1.9rem;
  position: relative;
}

.check-list li::before {
  content: "✔";
  position: absolute;
  left: 0.25rem;
  color: var(--green-600);
  font-weight: 700;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.card .card-body { padding: 1.1rem 1.25rem 1.35rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }

.card h3 { margin: 0; font-size: 1.15rem; }

.card p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; flex: 1; }

.card a.card-link { font-weight: 600; text-decoration: none; }

/* Figures / galleries */
.figure-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
  margin: 1.75rem 0;
}

figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

figure img { width: 100%; object-fit: cover; }

.figure-grid figure img { aspect-ratio: 3 / 4; }

figcaption {
  padding: 0.7rem 0.9rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

figure.wide img { aspect-ratio: auto; }

/* Pricing */
.price-box {
  background: var(--green-50);
  border: 1px solid var(--green-100);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
  margin: 1.25rem 0;
}

.price-box .price {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--green-800);
  margin: 0;
}

.price-box .price small { font-size: 1rem; font-weight: 500; color: var(--ink-soft); }

table.price-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

table.price-table th,
table.price-table td {
  text-align: left;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--line);
}

table.price-table tr:last-child td { border-bottom: none; }

table.price-table th {
  background: var(--green-800);
  color: #fff;
  font-weight: 600;
}

table.price-table td:last-child { text-align: right; white-space: nowrap; font-weight: 600; }

/* Downloads */
.download-list { list-style: none; padding: 0; margin: 1rem 0; }

.download-list li { margin: 0.4rem 0; padding-left: 1.7rem; position: relative; }

.download-list li::before {
  content: "⬇";
  position: absolute;
  left: 0.1rem;
  color: var(--amber);
}

.download-list li.video::before { content: "▶"; }
.download-list li.external::before { content: "↗"; }

/* FAQ accordions */
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0.6rem 0;
  padding: 0;
}

.faq summary {
  cursor: pointer;
  padding: 0.8rem 1.1rem;
  font-weight: 600;
  color: var(--green-800);
  list-style: none;
  position: relative;
  padding-right: 2.4rem;
}

.faq summary::-webkit-details-marker { display: none; }

.faq summary::after {
  content: "+";
  position: absolute;
  right: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--green-600);
}

.faq details[open] summary::after { content: "–"; }

.faq details p { margin: 0; padding: 0 1.1rem 1rem; color: var(--ink-soft); }

/* Callout / CTA */
.callout {
  background: var(--green-800);
  color: #fff;
  border-radius: var(--radius);
  padding: 2rem 2.25rem;
  margin: 2.5rem 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.callout h2 { color: #fff; margin: 0 0 0.35rem; }

.callout p { margin: 0; color: var(--green-100); }

.callout .btn-primary { background: #fff; color: var(--green-800); }
.callout .btn-primary:hover { background: var(--green-100); color: var(--green-900); }

/* Contact page */
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem 2rem;
}

.contact-card p { margin: 0.4rem 0; }

.contact-card .label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-top: 1.1rem;
}

/* History tag */
.history-note {
  display: inline-block;
  background: var(--green-100);
  color: var(--green-800);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 0.25rem 0.9rem;
  margin-bottom: 1rem;
}

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

.site-footer {
  background: var(--green-900);
  color: #cfe0d5;
  padding: 3rem 0 2rem;
  font-size: 0.95rem;
}

.site-footer a { color: #fff; }

.footer-cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
}

@media (max-width: 820px) {
  .footer-cols { grid-template-columns: 1fr; gap: 1.75rem; }
}

.site-footer h4 {
  color: #fff;
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer ul { list-style: none; margin: 0; padding: 0; }

.site-footer li { margin: 0.35rem 0; }

.site-footer .mission { max-width: 34em; margin: 0; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  font-size: 0.85rem;
  color: #9db8a8;
}