/* ===== Hexla Molecular Laboratory Group Ltd. — Stylesheet ===== */

:root {
  --color-navy: #03045E;
  --color-navy-light: #023E8A;
  --color-teal: #0096C7;
  --color-teal-dark: #0077B6;
  --color-bg: #F8FAFC;
  --color-white: #FFFFFF;
  --color-text: #1E293B;
  --color-muted: #64748B;
  --color-border: #E2E8F0;

  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-heading: "Space Grotesk", var(--font-body);

  --radius: 12px;
  --shadow: 0 10px 30px rgba(3, 4, 94, 0.06);
  --shadow-lg: 0 18px 45px rgba(3, 4, 94, 0.12);

  --container: 1160px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-navy);
  line-height: 1.2;
}

h1 { font-size: clamp(2.1rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); margin-bottom: .75rem; }
h3 { font-size: 1.15rem; }

p { margin-bottom: 1rem; }
.accent { color: var(--color-teal); }

.container {
  width: min(var(--container), 92%);
  margin-inline: auto;
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: .85rem 1.7rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--color-teal);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0, 150, 199, .3);
}
.btn-primary:hover { background: var(--color-teal-dark); }

.btn-ghost {
  border-color: rgba(255,255,255,.45);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255,255,255,.12); }

.btn-light {
  background: #fff;
  color: var(--color-navy);
  box-shadow: var(--shadow);
}
.btn-light:hover { background: #F1F5F9; }

.btn-small { padding: .5rem 1.1rem; font-size: .85rem; }
.btn-block { width: 100%; text-align: center; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(3, 4, 94, 0.98);
  backdrop-filter: blur(8px);
  color: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,.15);
}

.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding-block: .9rem; }

.brand { display: flex; align-items: center; gap: .6rem; color: #fff; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-family: var(--font-heading); letter-spacing: .1em; font-size: 1.15rem; color: #fff; }
.brand-text small { font-size: .65rem; letter-spacing: .15em; color: #90E0EF; }

.site-nav { display: flex; align-items: center; gap: 1.4rem; }
.site-nav a:not(.btn) {
  color: #CAF0F8;
  font-weight: 500;
  font-size: .95rem;
  padding-block: .3rem;
  border-bottom: 2px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.site-nav a:not(.btn):hover { color: #fff; }
.site-nav a:not(.btn).active { color: #fff; border-bottom-color: var(--color-teal); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 34px;
  height: 28px;
  flex-direction: column;
  justify-content: space-between;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background: #fff;
  border-radius: 3px;
  transition: transform .2s ease, opacity .2s ease;
}

/* ===== Hero ===== */
.hero {
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(0,150,199,.25), transparent 60%),
    var(--color-navy);
  color: #CAF0F8;
  padding: clamp(4rem, 8vw, 7rem) 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  color: var(--color-teal);
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  font-size: .78rem;
  margin-bottom: 1rem;
}

.hero h1 { color: #fff; margin-bottom: 1.1rem; }
.lead { font-size: 1.12rem; color: #ADE8F4; max-width: 56ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .9rem; margin-top: 1.6rem; }
.hero-visual { display: flex; justify-content: center; }

/* ===== Sections ===== */
.section { padding: clamp(3.5rem, 7vw, 5.5rem) 0; }
.section-head { max-width: 640px; margin-bottom: 2.2rem; }
.section-head p { color: var(--color-muted); }

.narrow { max-width: 760px; }

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.4rem;
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.7rem 1.6rem;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-teal);
}

.card-icon { font-size: 1.9rem; }
.card p { color: var(--color-muted); font-size: .95rem; margin-bottom: .2rem; }
.card-link { color: var(--color-teal-dark); font-weight: 600; font-size: .9rem; margin-top: auto; }

/* ===== CTA band ===== */
.cta {
  background: linear-gradient(120deg, var(--color-teal), var(--color-navy-light));
  color: #fff;
  text-align: center;
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}
.cta h2 { color: #fff; }
.cta p { opacity: .9; margin-bottom: 1.4rem; color: #CAF0F8; }

/* ===== Page hero ===== */
.page-hero {
  background: var(--color-navy);
  color: #CAF0F8;
  padding: clamp(3rem, 6vw, 4.5rem) 0;
  text-align: center;
}
.page-hero h1 { color: #fff; margin-bottom: .6rem; }
.page-hero .lead { margin-inline: auto; color: #ADE8F4; }

/* ===== Search bar ===== */
.search-wrap {
  max-width: 580px;
  margin: 1.8rem auto 0;
}
.search-wrap input {
  width: 100%;
  padding: .9rem 1.2rem;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.25);
  background: rgba(255,255,255,.08);
  color: #fff;
  font-size: 1rem;
  font-family: var(--font-body);
  transition: background .15s ease, border-color .15s ease;
}
.search-wrap input::placeholder { color: #90E0EF; }
.search-wrap input:focus {
  outline: none;
  background: rgba(255,255,255,.15);
  border-color: var(--color-teal);
}

.no-results {
  text-align: center;
  padding: 3rem 1rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}
.no-results h2, .no-results h3 { margin-bottom: .5rem; }
.no-results p { color: var(--color-muted); margin-bottom: 1.2rem; }

/* ===== Product categories ===== */
.category {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.9rem 1.8rem;
  margin-bottom: 1.5rem;
  scroll-margin-top: 90px;
}
.category-head { margin-bottom: 1rem; }
.category-head p { color: var(--color-muted); margin: 0; }

.product-list { list-style: none; }
.product-list li {
  padding: .55rem 0 .55rem 1.4rem;
  border-top: 1px dashed var(--color-border);
  position: relative;
  color: #334155;
}
.product-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1rem;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--color-teal);
  transform: rotate(45deg);
}

.cta-inline {
  text-align: center;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2.4rem 1.5rem;
  margin-top: 2rem;
}
.cta-inline p { color: var(--color-muted); }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2.5rem;
  align-items: start;
}

.contact-info h2 { margin-bottom: 1.6rem; }
.info-row { margin-bottom: 1.5rem; padding-bottom: 1.2rem; border-bottom: 1px solid var(--color-border); }
.info-row h3 {
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--color-muted);
  margin-bottom: .35rem;
}
.info-row p { margin: 0; }
.info-row a { color: var(--color-teal-dark); font-weight: 500; }
.info-row a:hover { text-decoration: underline; }

.contact-form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 2rem;
}
.contact-form h2 { margin-bottom: 1.4rem; }

.form-row { margin-bottom: 1.1rem; }
.form-row label {
  display: block;
  font-size: .88rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: .4rem;
}
.form-row input,
.form-row select,
.form-row textarea {
  width: 100%;
  padding: .7rem .9rem;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px rgba(0,150,199,.15);
  background: #fff;
}

.form-note {
  margin-top: 1rem;
  padding: .8rem 1rem;
  border-radius: 10px;
  font-weight: 500;
  font-size: .92rem;
}
.form-note.success { background: #ECFDF5; color: #047857; border: 1px solid #A7F3D0; }
.form-note.error { background: #FEF2F2; color: #B91C1C; border: 1px solid #FECACA; }
.form-error { border-color: #EF4444 !important; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-navy);
  color: #CAF0F8;
  padding-top: 3rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 2rem;
  padding-bottom: 2rem;
}
.footer-brand {
  font-family: var(--font-heading);
  color: #fff;
  letter-spacing: .08em;
  font-weight: 600;
}
.footer-heading {
  color: #fff;
  font-weight: 600;
  margin-bottom: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .8rem;
}
.site-footer a { color: #CAF0F8; display: block; margin-bottom: .4rem; }
.site-footer a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12);
  padding-block: 1.2rem;
  font-size: .85rem;
}
.footer-bottom p { margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .hero-inner, .contact-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .nav-toggle { display: flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(300px, 78vw);
    background: var(--color-navy);
    flex-direction: column;
    align-items: flex-start;
    gap: .4rem;
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform .25s ease;
    box-shadow: -10px 0 40px rgba(0,0,0,.3);
  }
  .site-nav.open { transform: translateX(0); }
  .site-nav a:not(.btn) { font-size: 1.05rem; padding-block: .6rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}