/* The Omics Hub — Start Here Redesigned Learning Journey
   =======================================================
   Audience intent: concise learner orientation with profile guidance carried inside
   a compact, premium three-laptop banner rather than repeated as page cards. */
:root {
  --sh-ink: #0B2741;
  --sh-navy: #123B5D;
  --sh-blue: #2563EB;
  --sh-cyan: #22D3EE;
  --sh-violet: #A78BFA;
  --sh-gold: #FBBF24;
  --sh-emerald: #34D399;
  --sh-copy: #4D6478;
  --sh-muted: #71869A;
  --sh-line: #E2E8F0;
  --sh-bg: #F8FAFC;
  --sh-radius: 1rem;
  --sh-radius-lg: 1.25rem;
}

html { scroll-behavior: smooth; }

/* ── Nav active state ── */
header nav a[aria-current="page"] .nav-network-mark {
  flex-basis: 1.5rem; width: 1.5rem; height: 1.5rem;
  margin-left: .12rem; padding: 0; border: 0;
  background: transparent; box-shadow: none;
}

/* ── Container ── */
.sh-container {
  width: min(100% - 2rem, 74rem);
  margin: 0 auto;
  padding-left: clamp(0.5rem, 2vw, 1.5rem);
  padding-right: clamp(0.5rem, 2vw, 1.5rem);
}

/* ── Shared elements ── */
.sh-label {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  line-height: 1.4;
}
.sh-label-blue { color: var(--sh-ink); }
.sh-label-violet { color: var(--sh-violet); }

.sh-section-title {
  margin: 0.5rem 0 0.65rem;
  color: var(--sh-ink);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 840;
  letter-spacing: -0.04em;
  line-height: 1.05;
}

.sh-section-desc {
  margin: 0;
  max-width: 42rem;
  color: var(--sh-copy);
  font-size: 1.02rem;
  line-height: 1.72;
}

.sh-section-header { margin-bottom: 2.5rem; }

/* ── Buttons ── */
.sh-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.82rem 1.3rem;
  border-radius: 0.7rem;
  font-size: 0.95rem;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.sh-btn:hover { transform: translateY(-2px); }

.sh-btn-white {
  background: #fff; color: var(--sh-ink); border: 1px solid #fff;
}
.sh-btn-white:hover { background: #EAF4FF; box-shadow: 0 6px 20px rgba(255,255,255,.15); }

.sh-btn-ghost {
  background: rgba(255,255,255,.06); color: #fff; border: 1px solid rgba(191,219,254,.5);
}
.sh-btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.12); }

.sh-btn-dark {
  background: var(--sh-ink); color: #fff; border: 1px solid var(--sh-ink);
}
.sh-btn-dark:hover { background: #061929; box-shadow: 0 8px 24px rgba(11,39,65,.2); }


/* ═══════════════════════════════
   SECTION 1 — HERO
   ═══════════════════════════════ */
.sh-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 26rem;
  padding: clamp(3rem, 7vw, 6rem) clamp(1.5rem, 5vw, 4rem);
  background: #123B5D;
  color: #fff;
  overflow: hidden;
}

.sh-hero::before {
  content: "";
  position: absolute; top: -7rem; right: -5rem;
  width: 26rem; height: 26rem;
  border: 1px solid rgba(147,197,253,.14);
  border-radius: 50%;
  box-shadow: 0 0 0 4rem rgba(147,197,253,.025);
  pointer-events: none;
}
.sh-hero::after {
  content: "";
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--sh-cyan), var(--sh-blue), var(--sh-violet));
}

.sh-hero-content { position: relative; z-index: 1; max-width: 44rem; }
.sh-hero .sh-label { color: #93C5FD; }

.sh-hero h1 {
  margin: 0.85rem 0 1.15rem;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.05;
}

.sh-hero-desc { color: #D0E2F2; font-size: clamp(1.05rem, 1.4vw, 1.2rem); line-height: 1.75; }
.sh-hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; margin-top: 1.8rem; }


/* ═══════════════════════════════
   SECTION 2 — AUDIENCE
   ═══════════════════════════════ */
.sh-audience {
  padding: clamp(3.5rem, 7vw, 5.5rem) 0;
  background: #fff;
}
.sh-audience-intro { max-width: 53rem; }
.sh-audience-heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
  margin-top: .45rem;
}
.sh-audience-intro .sh-section-title { margin: 0; white-space: nowrap; }
.sh-audience-intro .sh-section-desc { max-width: 31rem; padding-bottom: .1rem; }

.sh-audience-visual {
  position: relative;
  display: flex;
  aspect-ratio: 21 / 9;
  margin: 2.1rem 0 1rem;
  overflow: hidden;
  border: 1px solid #D9E6F1;
  border-radius: var(--sh-radius);
  background: var(--sh-navy);
  box-shadow: 0 12px 28px rgba(11,39,65,.08);
}
.sh-audience-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: inherit;
  pointer-events: none;
}
.sh-audience-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}


/* ═══════════════════════════════
   SECTION 3 — FOUNDATION
   ═══════════════════════════════ */
.sh-foundation-wrap {
  background: var(--sh-bg);
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  scroll-margin-top: 5rem;
}

.sh-steps-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.sh-step {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  gap: 0.9rem;
  align-items: center;
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--sh-line);
  border-radius: var(--sh-radius);
  background: #fff;
  text-decoration: none;
  color: inherit;
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.sh-step:hover {
  border-color: var(--sh-ink);
  box-shadow: 0 10px 28px rgba(11,39,65,.08);
  transform: translateY(-2px);
}

.sh-step-num {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 3.2rem; height: 3.2rem;
  border-radius: 50%;
  background: var(--sh-ink);
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.85rem; font-weight: 800;
  letter-spacing: 0.03em;
  flex-shrink: 0;
}

.sh-step-body h3 {
  margin: 0 0 0.3rem;
  color: var(--sh-ink);
  font-size: 1.12rem; font-weight: 730; letter-spacing: -0.02em;
}
.sh-step-body p { margin: 0; color: var(--sh-copy); font-size: 0.9rem; line-height: 1.58; }

.sh-step-cta {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid #AFC9E1; border-radius: 0.6rem;
  color: var(--sh-navy);
  font-size: 0.85rem; font-weight: 700;
  white-space: nowrap;
  transition: background .2s, color .2s, border-color .2s;
}
.sh-step:hover .sh-step-cta {
  background: var(--sh-ink); border-color: var(--sh-ink); color: #fff;
}

.sh-tip {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--sh-ink);
  background: #fff;
  border-radius: 0 var(--sh-radius) var(--sh-radius) 0;
  color: var(--sh-copy);
  font-size: 0.92rem; line-height: 1.65;
}
.sh-tip strong { color: var(--sh-ink); }


/* ═══════════════════════════════
   SECTION 4 — ROUTES
   ═══════════════════════════════ */
.sh-routes-wrap {
  padding: clamp(3rem, 7vw, 5.5rem) 0;
}

.sh-routes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.sh-route-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--sh-line);
  border-radius: var(--sh-radius-lg);
  background: #fff;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color .25s, box-shadow .25s, transform .25s;
}
.sh-route-card:hover {
  border-color: transparent;
  box-shadow: 0 16px 40px rgba(11,39,65,.1);
  transform: translateY(-4px);
}

.sh-route-img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  display: block;
  object-fit: cover;
  object-position: center;
  transition: transform .5s;
}
.sh-route-card:hover .sh-route-img { transform: scale(1.04); }

.sh-route-body { padding: 1.35rem 1.5rem 1.5rem; }

.sh-route-tag {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem; font-weight: 800;
  letter-spacing: 0.14em; text-transform: uppercase;
}
.sh-tag-violet { color: var(--sh-violet); }
.sh-tag-blue   { color: var(--sh-ink); }
.sh-tag-cyan   { color: var(--sh-cyan); }
.sh-tag-gold   { color: var(--sh-gold); }

.sh-route-body h3 {
  margin: 0.55rem 0 0.4rem;
  color: var(--sh-ink);
  font-size: 1.28rem; font-weight: 770; letter-spacing: -0.025em; line-height: 1.2;
}
.sh-route-body p { margin: 0; color: var(--sh-copy); font-size: 0.93rem; line-height: 1.6; }

.sh-route-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  margin-top: 0.95rem;
  color: var(--sh-ink);
  font-size: 0.9rem; font-weight: 750;
}
.sh-route-card:hover .sh-route-link { text-decoration: underline; }


/* ═══════════════════════════════
   SECTION 5 — CATALOGUE
   ═══════════════════════════════ */
.sh-catalogue-wrap {
  padding: clamp(3rem, 6vw, 4.5rem) 0;
  border-top: 1px solid var(--sh-line);
}

.sh-catalogue-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.sh-catalogue-inner h2 {
  margin: 0 0 0.35rem;
  color: var(--sh-ink);
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  font-weight: 820; letter-spacing: -0.03em; line-height: 1.15;
}
.sh-catalogue-inner p {
  margin: 0; max-width: 36rem;
  color: var(--sh-copy); font-size: 1rem; line-height: 1.65;
}


/* ═══════════════════════════════
   FOCUS & ACCESSIBILITY
   ═══════════════════════════════ */
.sh-btn:focus-visible, .sh-step:focus-visible, .sh-route-card:focus-visible {
  outline: 3px solid var(--sh-ink);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sh-btn, .sh-step, .sh-route-card, .sh-hero-visual img, .sh-route-img {
    transition: none;
  }
}


/* ═══════════════════════════════
   RESPONSIVE
   ═══════════════════════════════ */
@media (max-width: 900px) {
  .sh-audience-heading-row { display: block; }
  .sh-audience-intro .sh-section-title { margin-top: .5rem; }
  .sh-audience-intro .sh-section-desc { margin-top: .8rem; }
  .sh-steps-grid { grid-template-columns: 1fr; }
  .sh-routes-grid { grid-template-columns: 1fr; }
  .sh-catalogue-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 700px) {
  .sh-hero { min-height: auto; padding: 3.5rem 1.25rem; }
  .sh-audience-visual { margin: 1.65rem 0 .8rem; }
  .sh-audience-visual img { min-height: 0; }

  .sh-step { grid-template-columns: 2.8rem 1fr; gap: 0.7rem; }
  .sh-step-num { width: 2.6rem; height: 2.6rem; font-size: 0.75rem; }
  .sh-step-cta { grid-column: 2; justify-self: start; margin-top: 0.4rem; }

  .sh-route-img { aspect-ratio: 16 / 9; height: auto; }
}