/* SITRUS — Surrey Initiative for Training and Research in Ultrasound
   Static site stylesheet */

:root {
  --navy: #0f2a43;
  --navy-dark: #0a1c30;
  --teal: #1f8a8c;
  --teal-dark: #166b6d;
  --bg: #f6f8fa;
  --text: #22303f;
  --muted: #5b6b7a;
  --border: #e2e8ee;
  --white: #ffffff;
  --radius: 10px;
  --max-width: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

img { max-width: 100%; display: block; }
a { color: var(--teal-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

.site-header { border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--white); z-index: 50; }
.site-header .inner { display: flex; align-items: center; gap: 16px; padding: 14px 24px; max-width: var(--max-width); margin: 0 auto; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy); margin-right: auto; }
.brand img { height: 44px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 0.95rem; letter-spacing: 0.02em; color: var(--navy); }
.brand-text span { font-size: 0.78rem; color: var(--muted); }
nav.main-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
nav.main-nav a { color: var(--navy); padding: 8px 12px; border-radius: 6px; font-size: 0.92rem; font-weight: 500; }
nav.main-nav a:hover, nav.main-nav a[aria-current="page"] { background: var(--bg); text-decoration: none; color: var(--teal-dark); }
.header-contact { font-size: 0.85rem; color: var(--muted); white-space: nowrap; }

.hero { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%); color: var(--white); padding: 64px 0 56px; }
.hero .container { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; align-items: center; }
.hero h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 18px; letter-spacing: 0.01em; }
.hero p { color: #cfe0e6; margin: 0 0 14px; max-width: 54ch; }
.hero img { border-radius: var(--radius); box-shadow: 0 20px 45px rgba(0,0,0,0.35); }

.page-hero { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%); color: var(--white); padding: 48px 0; }
.page-hero h1 { margin: 0 0 10px; font-size: 1.9rem; }
.page-hero p { color: #cfe0e6; margin: 0; max-width: 60ch; }

.btn { display: inline-block; padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 0.95rem; cursor: pointer; border: none; }
.btn-primary { background: var(--teal); color: var(--white); }
.btn-primary:hover { background: var(--teal-dark); text-decoration: none; }
.btn-outline { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.1); text-decoration: none; }

section { padding: 56px 0; }
section.alt { background: var(--bg); }
h2.section-title { font-size: 1.5rem; margin: 0 0 8px; color: var(--navy); }
.section-lede { color: var(--muted); margin: 0 0 32px; max-width: 70ch; }

.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.course-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: box-shadow 0.15s ease, transform 0.15s ease; }
.course-card:hover { box-shadow: 0 12px 30px rgba(15,42,67,0.08); transform: translateY(-2px); }
.course-card img.icon { height: 36px; width: auto; margin-bottom: 14px; }
.course-card h3 { margin: 0 0 8px; font-size: 1.05rem; color: var(--navy); }
.course-card h3 a { color: inherit; }
.course-card h3 a:hover { color: var(--teal-dark); }
.course-card p { color: var(--muted); margin: 0; font-size: 0.94rem; }

.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
blockquote.testimonial { margin: 0; padding: 20px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); font-size: 0.92rem; color: var(--text); }
blockquote.testimonial p { margin: 0 0 6px; }
blockquote.testimonial p:last-child { margin: 0; }

.course-detail { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 40px; align-items: start; }
.course-detail img { border-radius: var(--radius); }
.programme-box { margin-top: 28px; padding: 20px; background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); }
.programme-box h3 { margin: 0 0 8px; font-size: 1rem; color: var(--navy); }
.programme-box p { margin: 0 0 12px; color: var(--muted); font-size: 0.92rem; }

.event-card { display: flex; gap: 18px; padding: 18px; border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; align-items: center; }
.event-card img { width: 90px; height: 60px; object-fit: cover; border-radius: 6px; flex-shrink: 0; }
.event-card h4 { margin: 0 0 4px; color: var(--navy); font-size: 1rem; }
.event-card .meta { color: var(--muted); font-size: 0.85rem; margin: 0 0 4px; }
.event-card .status { font-size: 0.82rem; color: var(--teal-dark); font-weight: 600; }
.no-events { padding: 32px; text-align: center; color: var(--muted); border: 1px dashed var(--border); border-radius: var(--radius); }

.faculty-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.faculty-member { display: flex; gap: 14px; }
.faculty-member img { width: 76px; height: 76px; object-fit: cover; border-radius: 50%; flex-shrink: 0; border: 2px solid var(--border); }
.faculty-member h3 { margin: 0 0 2px; font-size: 1rem; color: var(--navy); }
.faculty-member .role { font-size: 0.85rem; color: var(--teal-dark); margin: 0 0 6px; font-weight: 600; }
.faculty-member p { margin: 0 0 6px; font-size: 0.88rem; color: var(--muted); }
.faculty-member a.social { font-size: 0.84rem; }

.accred-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.accred-card { display: flex; gap: 16px; align-items: flex-start; padding: 20px; border: 1px solid var(--border); border-radius: var(--radius); }
.accred-card img { max-height: 46px; width: auto; flex-shrink: 0; }
.accred-card h3 { margin: 0 0 6px; font-size: 1rem; color: var(--navy); }
.accred-card p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.charity-strip { background: var(--navy); color: var(--white); padding: 20px 0; text-align: center; font-size: 0.9rem; }
.charity-strip a { color: #9fe0e0; }

.subscribe { background: var(--navy-dark); color: var(--white); padding: 48px 0; }
.subscribe h2 { margin: 0 0 6px; font-size: 1.3rem; }
.subscribe p { color: #b9c9d3; margin: 0 0 20px; max-width: 60ch; }
.subscribe-form { display: flex; gap: 10px; flex-wrap: wrap; max-width: 480px; }
.subscribe-form input[type="email"], .subscribe-form input[type="text"] { flex: 1; min-width: 200px; padding: 12px 14px; border-radius: 8px; border: 1px solid rgba(255,255,255,0.25); background: rgba(255,255,255,0.08); color: var(--white); font-size: 0.92rem; }
.subscribe-form input::placeholder { color: #9fb1bd; }
.subscribe-note { font-size: 0.78rem; color: #8fa2af; margin-top: 10px; }

.prose { max-width: 74ch; }
.prose p { margin: 0 0 16px; color: var(--text); }
.prose img { border-radius: var(--radius); margin: 24px 0; }

footer.site-footer { background: var(--navy-dark); color: #b9c9d3; padding: 32px 0; font-size: 0.85rem; }
footer.site-footer .inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
footer.site-footer a { color: #b9c9d3; }

@media (max-width: 860px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero .hero-image { order: -1; }
  .course-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .course-detail { grid-template-columns: 1fr; }
  .faculty-grid { grid-template-columns: 1fr; }
  .accred-grid { grid-template-columns: 1fr; }
}