/* BSC Associates — redesign stylesheet
   Typography: Gill Sans (headings), Palatino (body)
   Colour: deep navy + warm paper + two accents
     — warm red-orange on light backgrounds (--gold-dark)
     — bright saffron yellow reversed out on dark (--gold) */

:root {
  --ink: #141b2d;
  --navy: #0b2545;
  --navy-70: rgba(11, 37, 69, 0.70);
  --paper: #faf7f0;
  --paper-2: #f2ede1;
  --gold: #f2ca24;          /* reversed-out on dark: bright yellow-gold */
  --gold-dark: #bf3f22;     /* on light: warm red-orange */
  --muted: #5a6073;
  --line: #e5e0d5;
  --white: #ffffff;

  --display: "Gill Sans Nova", "Gill Sans MT", "Gill Sans", "Seravek", "Trebuchet MS", "Segoe UI", system-ui, sans-serif;
  --body: "Palatino", "Palatino Linotype", "Book Antiqua", "Iowan Old Style", Georgia, serif;

  --max: 1200px;
  --gutter: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6,
.eyebrow, .nav a, .btn, .stat-num, .logo {
  font-family: var(--display);
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.005em;
}

h1 { font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.05; margin: 0 0 0.5em; letter-spacing: -0.015em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.15; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; line-height: 1.3; margin: 0 0 0.4em; }
h4 { font-size: 1.05rem; margin: 0 0 0.3em; }

p { margin: 0 0 1em; }
a { color: var(--navy); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--gold-dark); }

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

/* ---------- Layout primitives ---------- */
.container { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: clamp(56px, 9vw, 120px) 0; }
.section-tight { padding: clamp(40px, 6vw, 80px) 0; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold-dark);
  font-weight: 600;
  margin-bottom: 1em;
  display: inline-block;
}

.lede {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 56ch;
  line-height: 1.55;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 247, 240, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--gutter);
  max-width: var(--max); margin: 0 auto;
}
.logo {
  font-weight: 600; font-size: 1.15rem; letter-spacing: 0.01em;
  color: var(--navy); text-decoration: none;
  display: inline-flex; align-items: center; gap: 10px;
}
.logo-mark {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--navy);
  display: inline-grid; place-items: center;
  color: var(--paper); font-size: 0.72rem; letter-spacing: 0.04em;
  font-family: var(--display); font-weight: 600;
}
.nav-links {
  display: flex; gap: 28px; align-items: center;
  list-style: none; margin: 0; padding: 0;
}
.nav-links a {
  text-decoration: none; color: var(--navy); font-size: 0.95rem;
  padding: 6px 0; border-bottom: 1px solid transparent;
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  border-bottom-color: var(--gold-dark);
}
.nav-cta {
  display: inline-block; padding: 9px 18px;
  background: var(--navy); color: var(--paper) !important;
  border-radius: 2px; text-decoration: none;
  font-family: var(--display); font-size: 0.9rem;
}
.nav-cta:hover { background: var(--gold-dark); color: var(--paper) !important; }

.nav-toggle {
  display: none; background: transparent; border: 0; cursor: pointer;
  padding: 8px; color: var(--navy);
}
.nav-toggle svg { display: block; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 26px;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--navy);
  background: var(--navy);
  color: var(--paper);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--gold-dark); border-color: var(--gold-dark); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--navy); }
.btn-ghost:hover { background: var(--navy); color: var(--paper); }

/* ---------- Hero ---------- */
.hero {
  padding: clamp(72px, 10vw, 130px) 0 clamp(48px, 7vw, 90px);
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(191, 63, 34, 0.10), transparent 60%),
    radial-gradient(900px 400px at -10% 30%, rgba(11, 37, 69, 0.05), transparent 70%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}
.hero h1 span { color: var(--gold-dark); font-style: italic; }
.hero .lede { margin-top: 1.2em; font-size: 1.25rem; max-width: 50ch; }
.hero-ctas { margin-top: 2em; display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  aspect-ratio: 4 / 5;
  background: var(--paper-2);
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  border: 1px solid var(--line);
}
.hero-visual img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.hero-visual .placeholder {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  padding: 24px;
  color: var(--muted);
  font-family: var(--display);
  font-size: 0.9rem;
  text-align: center;
}
.hero-visual code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
  background: var(--white);
  padding: 1px 6px;
  border: 1px solid var(--line);
}

@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 420px; margin: 0 auto; }
}

/* ---------- Stats strip ---------- */
.stats {
  background: var(--navy);
  color: var(--paper);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}
.stat { text-align: left; }
.stat-num {
  display: block;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: var(--gold);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-family: var(--display);
  color: var(--paper);
  font-size: 0.95rem;
  opacity: 0.85;
}
@media (max-width: 720px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; padding: 36px 0; }
}

/* ---------- Section headers ---------- */
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: end;
  margin-bottom: clamp(32px, 5vw, 64px);
}
.section-head .lede { margin: 0; }
@media (max-width: 760px) { .section-head { grid-template-columns: 1fr; } }

/* ---------- Pillar cards (home) ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.pillar {
  padding: 36px 32px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold-dark);
  display: flex; flex-direction: column;
}
.pillar h3 {
  margin-top: 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gold-dark);
  display: inline-block;
}
.pillar p { color: var(--muted); font-size: 0.98rem; }
.pillar ul {
  margin: 1em 0 0; padding: 0; list-style: none;
  font-size: 0.95rem; color: var(--ink);
}
.pillar li { padding: 6px 0; border-top: 1px solid var(--line); }
.pillar li:first-child { border-top: 0; padding-top: 0; }

@media (max-width: 900px) { .pillars { grid-template-columns: 1fr; } }

/* ---------- Selected work ---------- */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.work-item {
  background: var(--white);
  border: 1px solid var(--line);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.work-image {
  aspect-ratio: 4 / 3;
  background: var(--paper-2);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.work-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.work-body {
  padding: 24px 28px 28px;
  display: flex; flex-direction: column;
}
.work-item:not(:has(.work-image)) .work-body { padding-top: 28px; }
.work-item .tag {
  font-family: var(--display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: 12px;
}
.work-item h4 { color: var(--navy); font-size: 1.15rem; margin-bottom: 8px; }
.work-item p { color: var(--muted); font-size: 0.95rem; margin: 0; }
@media (max-width: 900px) { .work-grid { grid-template-columns: 1fr; } }

/* ---------- Credentials logos (text-based) ---------- */
.credentials {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cred-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  padding: 56px 0;
  align-items: center;
}
.cred {
  font-family: var(--display);
  color: var(--navy);
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.3;
  padding: 12px;
}
.cred strong { display: block; font-weight: 600; font-size: 1rem; letter-spacing: 0.02em; }
.cred span { display: block; color: var(--muted); font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; margin-top: 4px; }

/* ---------- About teaser / content blocks ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

.portrait-frame {
  aspect-ratio: 4 / 5;
  background: var(--paper-2);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  max-width: 440px;
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; }
.portrait-frame .placeholder {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  color: var(--muted); font-family: var(--display);
  font-size: 0.9rem; text-align: center; padding: 20px;
}

/* ---------- Contact callout ---------- */
.cta-band {
  background: var(--navy);
  color: var(--paper);
}
.cta-band .container {
  padding-top: clamp(56px, 8vw, 100px);
  padding-bottom: clamp(56px, 8vw, 100px);
}
.cta-band h2 { color: var(--paper); }
.cta-band .eyebrow { color: var(--gold); }
.cta-band .lede { color: rgba(250, 247, 240, 0.85); max-width: 52ch; }
.cta-band .btn { background: var(--gold); border-color: var(--gold); color: var(--navy); }
.cta-band .btn:hover { background: var(--paper); border-color: var(--paper); color: var(--navy); }
.cta-band .btn-ghost { background: transparent; color: var(--paper); border-color: var(--paper); }
.cta-band .btn-ghost:hover { background: var(--paper); color: var(--navy); }

/* ---------- Services page ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px 56px;
}
.service-block h3 {
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gold-dark);
  display: inline-block;
  color: var(--navy);
}
.service-block ul {
  padding-left: 0;
  list-style: none;
  margin: 0;
}
.service-block li {
  padding: 10px 0 10px 22px;
  border-bottom: 1px solid var(--line);
  position: relative;
  font-size: 0.98rem;
}
.service-block li:before {
  content: "";
  position: absolute;
  left: 0; top: 18px;
  width: 8px; height: 8px;
  background: var(--gold-dark);
  transform: rotate(45deg);
}
@media (max-width: 800px) { .services-grid { grid-template-columns: 1fr; gap: 40px; } }

.markets {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 1em;
}
.market-tag {
  font-family: var(--display);
  font-size: 0.9rem;
  padding: 8px 14px;
  background: var(--white);
  border: 1px solid var(--line);
  color: var(--navy);
}

.equipment {
  background: var(--paper-2);
  padding: 36px; border-left: 3px solid var(--gold-dark);
}
.equipment h3 { color: var(--navy); margin-top: 0; }

/* ---------- About page ---------- */
.bio-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(32px, 6vw, 72px);
  align-items: start;
}
.bio-grid .sidebar { position: sticky; top: 100px; }
.sidebar-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px;
  margin-bottom: 24px;
}
.sidebar-card h4 {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--gold-dark);
  margin-bottom: 12px;
}
.sidebar-card ul { list-style: none; padding: 0; margin: 0; font-size: 0.95rem; }
.sidebar-card li { padding: 6px 0; border-top: 1px solid var(--line); }
.sidebar-card li:first-child { border-top: 0; padding-top: 0; }

@media (max-width: 860px) {
  .bio-grid { grid-template-columns: 1fr; }
  .bio-grid .sidebar { position: static; }
}

.timeline { list-style: none; padding: 0; margin: 0; }
.timeline li {
  padding: 18px 0 18px 28px;
  border-top: 1px solid var(--line);
  position: relative;
}
.timeline li:before {
  content: "";
  position: absolute; left: 0; top: 28px;
  width: 14px; height: 1px; background: var(--gold-dark);
}
.timeline .date {
  font-family: var(--display);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--gold-dark);
  text-transform: uppercase;
  margin-bottom: 4px;
  display: block;
}

/* Patents / publications tables */
.ref-list { list-style: none; padding: 0; margin: 0; }
.ref-list > li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}
.ref-list > li:first-child { border-top: 0; }
.ref-num {
  font-family: var(--display);
  font-weight: 600;
  color: var(--gold-dark);
  letter-spacing: 0.05em;
  font-size: 0.85rem;
  padding-top: 2px;
}
.ref-title { font-weight: 600; color: var(--navy); display: block; margin-bottom: 2px; }
.ref-meta { color: var(--muted); font-size: 0.9rem; }

details.ref-group {
  border-top: 1px solid var(--line);
  padding: 18px 0;
}
details.ref-group > summary {
  font-family: var(--display);
  cursor: pointer;
  color: var(--navy);
  font-size: 1.05rem;
  list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
details.ref-group > summary::-webkit-details-marker { display: none; }
details.ref-group > summary:after {
  content: "+"; font-size: 1.4rem; color: var(--gold-dark);
}
details.ref-group[open] > summary:after { content: "–"; }

/* Countries map */
.countries {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2px;
  background: var(--line);
  border: 1px solid var(--line);
}
.country {
  background: var(--white);
  padding: 16px 20px;
  font-family: var(--display);
  font-size: 0.95rem;
}
.country .c-name { color: var(--navy); font-weight: 600; display: block; }
.country .c-act { color: var(--muted); font-size: 0.82rem; margin-top: 2px; display: block; line-height: 1.3; }

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 72px);
}
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 36px 32px;
}
.contact-item {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.contact-item:first-of-type { border-top: 0; padding-top: 0; }
.contact-label {
  font-family: var(--display);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-dark);
  display: block; margin-bottom: 4px;
}
.contact-value { font-size: 1.05rem; color: var(--navy); }
.contact-value a { color: var(--navy); text-decoration: none; }
.contact-value a:hover { color: var(--gold-dark); text-decoration: underline; }

form.inquiry { display: grid; gap: 18px; }
form.inquiry label {
  font-family: var(--display);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy);
  display: block; margin-bottom: 6px;
}
form.inquiry input, form.inquiry textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  font-family: var(--body);
  font-size: 1rem;
  color: var(--ink);
  border-radius: 0;
}
form.inquiry input:focus, form.inquiry textarea:focus {
  outline: 2px solid var(--gold-dark);
  outline-offset: 1px;
  border-color: var(--gold-dark);
}
form.inquiry textarea { min-height: 140px; resize: vertical; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(250, 247, 240, 0.82);
  padding: 56px 0 28px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 32px;
}
.site-footer h5 {
  font-family: var(--display);
  color: var(--paper);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.site-footer a { color: rgba(250, 247, 240, 0.82); text-decoration: none; }
.site-footer a:hover { color: var(--gold); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { padding: 4px 0; }
.footer-base {
  margin-top: 40px; padding-top: 24px;
  border-top: 1px solid rgba(250, 247, 240, 0.15);
  display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between;
  font-size: 0.82rem; color: rgba(250, 247, 240, 0.55);
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- Mobile nav ---------- */
@media (max-width: 780px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 16px;
    display: none;
  }
  .nav-links[data-open="true"] { display: flex; }
  .nav-links li { width: 100%; border-top: 1px solid var(--line); }
  .nav-links a { padding: 14px 0; display: block; }
  .nav-links .nav-cta { margin-top: 10px; text-align: center; }
}

/* Small helpers */
.text-center { text-align: center; }
.mt-2 { margin-top: 2em; }
.hidden { display: none; }