/* ══════════════════════════════════════════════════
   africaSTEMI Live! 2026
   Layout: CardioAlex-inspired structure
   Theme: Modern White Editorial
   ══════════════════════════════════════════════════ */

:root {
  --red:        #C8102E;
  --red-dk:     #9B0C22;
  --red-lt:     #FEF0F2;
  --red-mid:    rgba(200,16,46,.12);
  --navy:       #203F6F;
  --navy-lt:    #1A2F5A;
  --teal:       #0891B2;
  --gold:       #CA8A04;
  --white:      #FFFFFF;
  --off:        #F8F7F4;
  --border:     #E9E5DD;
  --border-lt:  #F0EDE6;
  --text:       #1A1A1A;
  --text-2:     #444444;
  --text-3:     #888888;
  --text-4:     #BBBBBB;

  --serif:  'Plus Jakarta Sans', -apple-system, sans-serif;
  --sans:   'Plus Jakarta Sans', -apple-system, sans-serif;
  --mono:   'DM Mono', monospace;
  --ease:   cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--sans);
  background: var(--white);
  color: var(--text);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.wrap { max-width: 1520px; margin: 0 auto; padding: 0 48px; }
@media (max-width: 768px) { .wrap { padding: 0 20px; } }

/* ─────────────────────────────────
   TOPBAR  (CardioAlex-style: 2 rows)
───────────────────────────────── */
.topbar-upper {
  background: var(--navy);
  padding: 0;
  height: var(--tb-h, 36px);
}
.topbar-upper .wrap {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  height: 100%;
}
.tb-social {
  display: flex;
  align-items: stretch;
}
.tb-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.45);
  border-right: 1px solid rgba(255,255,255,0.07);
  transition: all 0.2s;
}
.tb-social a:hover { color: #fff; background: rgba(255,255,255,0.06); }
.tb-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-left: 1px solid rgba(255,255,255,0.07);
}
.tb-search input {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 0.7rem;
  font-family: var(--sans);
  color: rgba(255,255,255,0.7);
  width: 180px;
  outline: none;
}
.tb-search input::placeholder { color: rgba(255,255,255,0.3); }
.tb-links {
  display: flex;
  align-items: stretch;
}
.tb-links a {
  display: flex;
  align-items: center;
  padding: 0 14px;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  border-left: 1px solid rgba(255,255,255,0.07);
  white-space: nowrap;
  transition: color 0.2s, background 0.2s;
}
.tb-links a:hover { color: #fff; background: rgba(255,255,255,0.05); }

/* ─────────────────────────────────
   NAV  (second bar — primary nav)
───────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 300;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 2px solid var(--red);
  box-shadow: 0 2px 24px rgba(0,0,0,0.06);
  min-height: var(--nav-h, 116px);
}
.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h, 116px);
  gap: 16px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-logo img { height: 100px; width: auto; }
.nav-logo-text {
  font-family: var(--sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.nav-logo-text small {
  display: block;
  font-family: var(--mono);
  font-size: 0.55rem;
  font-weight: 400;
  color: var(--red);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 2px;
}
.nav-menu a {
  display: block;
  padding: 6px 10px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-2);
  border-radius: 4px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-menu a:hover { color: var(--red); background: var(--red-lt); }
.nav-menu .active > a { color: var(--red); }
.nav-menu .dropdown { position: relative; }
.nav-menu .dropdown > a { display: flex; align-items: center; gap: 4px; }
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 2px solid var(--red);
  border-radius: 0 0 8px 8px;
  min-width: 210px;
  padding: 6px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all 0.2s var(--ease);
  box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}
.nav-menu .dropdown:hover .nav-dropdown { opacity: 1; visibility: visible; transform: none; }
.nav-dropdown a {
  display: block;
  padding: 9px 18px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-2);
  border-radius: 0;
  transition: all 0.15s;
}
.nav-dropdown a:hover { color: var(--red); background: var(--red-lt); }
.nav-reg {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--red);
  color: #fff !important;
  font-size: 0.72rem !important;
  font-weight: 700 !important;
  letter-spacing: 0.07em !important;
  text-transform: uppercase;
  padding: 9px 20px !important;
  border-radius: 3px !important;
  box-shadow: 0 2px 16px rgba(200,16,46,0.28);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s !important;
}
.nav-reg:hover {
  background: var(--red-dk) !important;
  transform: translateY(-1px) !important;
  box-shadow: 0 6px 24px rgba(200,16,46,0.38) !important;
}
.hamburger { display: none; padding: 6px; color: var(--text-2); font-size: 1.1rem; }

/* ── PAGE HERO (shared inner pages) ─ */
/* hero-sub, hero-pills, hero-meta components */
.hero-sub { font-size: 1rem; color: rgba(255,255,255,.6); line-height: 1.75; max-width: 58ch; margin-bottom: 20px; }
.hero-pills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero-pill { display: flex; align-items: center; gap: 7px; padding: 7px 14px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 20px; font-size: .78rem; color: rgba(255,255,255,.75); font-weight: 500; }
.hero-pill i { font-size: .72rem; color: rgba(255,255,255,.45); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero-meta-pill { display: flex; align-items: center; gap: 7px; padding: 6px 14px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.15); border-radius: 20px; font-size: .78rem; color: rgba(255,255,255,.75); font-weight: 500; }
.hero-meta-pill i { font-size: .72rem; color: rgba(255,255,255,.45); }
.page-hero { background: var(--navy); padding: 72px 0 64px; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: repeating-linear-gradient(90deg, rgba(255,255,255,.025) 0, rgba(255,255,255,.025) 1px, transparent 1px, transparent 80px), repeating-linear-gradient(0deg, rgba(255,255,255,.025) 0, rgba(255,255,255,.025) 1px, transparent 1px, transparent 80px); }
.page-hero .wrap { position: relative; z-index: 1; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: .65rem; letter-spacing: .12em; text-transform: uppercase; color: rgba(255,255,255,.35); margin-bottom: 20px; }
.breadcrumb a { color: rgba(255,255,255,.35); transition: color .2s; }
.breadcrumb a:hover { color: rgba(255,255,255,.7); }
.breadcrumb i { font-size: .5rem; }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; color: #fff; letter-spacing: -.03em; line-height: 1.05; margin-bottom: 16px; }
.page-hero h1 em { color: var(--red); font-style: normal; }
.page-hero p { font-size: 1rem; color: rgba(255,255,255,.55); line-height: 1.75; max-width: 58ch; }

/* ── FOOTER ───────────────────────── */
footer { background: #0A0A0A; color: rgba(255,255,255,0.55); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 56px; margin-bottom: 48px; }
.ft-brand h3 { font-family: var(--sans); font-size: 1.35rem; font-weight: 700; color: #fff; letter-spacing: -0.02em; margin-bottom: 10px; }
.ft-brand p { font-size: 0.78rem; color: rgba(255,255,255,0.3); line-height: 1.9; }
.ft-social { display: flex; gap: 6px; margin-top: 18px; }
.ft-social a {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 3px;
  font-size: 0.75rem; color: rgba(255,255,255,0.35);
  transition: all 0.2s;
}
.ft-social a:hover { background: var(--red); border-color: var(--red); color: #fff; transform: translateY(-2px); }
.ft-col h4 { font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.28); margin-bottom: 18px; }
.ft-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.ft-col ul a { font-size: 0.82rem; color: rgba(255,255,255,0.4); transition: color 0.2s; }
.ft-col ul a:hover { color: #fff; }
.ft-bar {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px;
}
.ft-bar span, .ft-bar a {
  font-family: var(--mono); font-size: 0.62rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: rgba(255,255,255,0.22);
}
.ft-bar a:hover { color: rgba(255,255,255,0.6); }

/* ── SCROLL REVEALS ──────────────── */
.js-ready .sr { opacity: 0; transform: translateY(24px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.js-ready .sr.show { opacity: 1; transform: none; }

/* ══════════════════════════════════════════════════
   RESPONSIVE — shared across all pages
   ══════════════════════════════════════════════════ */

/* ── 1200px ──────────────────────────────────────── */
@media (max-width: 1200px) {
  .stats-band-inner { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

/* ── 980px ──────────────────────────────────────── */
@media (max-width: 980px) {
  .nav-menu, .nav-reg { display: none; }
  .hamburger { display: block; }
  .tb-links a:nth-child(n+4) { display: none; }
  /* section-nav sticky top matches mobile nav height */
  .section-nav { top: 118px; }
}

/* ── 860px ──────────────────────────────────────── */
@media (max-width: 860px) {
  /* Index cards */
  .cards-row { grid-template-columns: 1fr 1fr; }
  .about-stats-grid { grid-template-columns: repeat(2, 1fr); }
  /* Collab card */
  .collab-card { grid-template-columns: 1fr; }
  .collab-logo-panel { height: 160px; border-right: none; border-bottom: 1px solid var(--border); }
  /* Timeline zigzag → single column */
  .tl-item { grid-template-columns: 40px 1fr !important; grid-template-rows: auto !important; }
  .tl-item.left .tl-content,
  .tl-item.right .tl-content { grid-column: 2; grid-row: 1; text-align: left; }
  .tl-item .tl-dot-col { grid-column: 1; }
  .tl-item.left .tl-card { margin-right: 0; margin-left: 14px; }
  .tl-item.right .tl-card { margin-left: 14px; }
  .tl-item.left .tl-card-head,
  .tl-item.left .tl-meta,
  .tl-item.left .tl-tags,
  .tl-item.left .tl-footer,
  .tl-item.left .tl-body { text-align: left; flex-direction: row; }
  .timeline-wrap::before { left: 20px !important; transform: none; right: auto; }
}

/* ── 768px ──────────────────────────────────────── */
@media (max-width: 768px) {
  .wrap { padding: 0 20px; }
  /* Page hero */
  .page-hero { padding: 48px 0 40px; }
  .page-hero h1 { font-size: clamp(1.8rem, 6vw, 2.8rem); }
  .hero-pills, .hero-meta { gap: 8px; margin-top: 18px; }
  /* Index hero */
  .hero { min-height: 55vw; }
  /* Stats band */
  .stats-band-inner { grid-template-columns: repeat(2, 1fr); }
  .stat-cell:nth-child(n+3):nth-child(-n+4) { border-top: 1px solid rgba(255,255,255,.08); }
  /* Programme */
  .prog-item { grid-template-columns: 1fr; gap: 4px; }
  .prog-time { border-right: none; padding-right: 0; min-width: auto; }
  /* Faculty section on homepage */
  .fac-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  /* Sponsors */
  .sp-logos { gap: 6px; }
  .sp-logo { height: 52px; }
  /* CTA */
  .cta-inner { grid-template-columns: 1fr !important; gap: 32px; }
  .cta-btns { flex-direction: column; width: 100%; }
  .btn-cta-w, .btn-cta-o { justify-content: center; }
  /* About */
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }
  /* Submissions form layout */
  .form-layout { grid-template-columns: 1fr; }
  /* Tab labels shorten */
  .cat-tabs { flex-wrap: wrap; }
}

/* ── 640px ──────────────────────────────────────── */
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .tb-links { display: none; }
  /* Footer */
  .footer-grid { grid-template-columns: 1fr !important; gap: 28px; }
  /* Cards single col */
  .cards-row { grid-template-columns: 1fr; }
  .about-stats-grid { grid-template-columns: 1fr 1fr; }
  /* Stats band */
  .stats-band-inner { grid-template-columns: repeat(2, 1fr); }
  /* Faculty grid */
  .faculty-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
  .fac-grid { grid-template-columns: repeat(2, 1fr); }
  /* Section nav scroll on mobile */
  .section-nav .wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; flex-wrap: nowrap; }
  .section-nav .wrap::-webkit-scrollbar { display: none; }
  .snav-btn { flex-shrink: 0; padding: 12px 16px; font-size: .7rem; }
  /* Committees */
  .committees-grid { grid-template-columns: 1fr !important; }
  /* Modal */
  .modal-top { grid-template-columns: 1fr; }
  .modal-photo { height: 200px; border-right: none; border-bottom: 1px solid var(--border); }
  /* Highlights */
  .highlights-grid { grid-template-columns: 1fr 1fr; }
  /* Enquiry cards */
  .enquiry-cards { grid-template-columns: 1fr; }
  /* Workshop grid */
  .workshop-grid { grid-template-columns: 1fr; }
  /* Pricing grid */
  .pricing-grid { grid-template-columns: 1fr !important; }
}

/* ── 480px ──────────────────────────────────────── */
@media (max-width: 480px) {
  .page-hero h1 { font-size: 1.65rem; }
  .hero-pill, .hero-meta-pill { font-size: .68rem; padding: 5px 10px; }
  .nav-logo img { height: 34px; }
  .nav .wrap { height: 80px; }
  .section-nav { top: 80px; }
  .stats-band-inner { grid-template-columns: 1fr 1fr; }
  .about-stats-grid { grid-template-columns: 1fr 1fr; }
  .fac-grid { grid-template-columns: repeat(2, 1fr); gap: 1px; }
  .highlights-grid { grid-template-columns: 1fr; }
  /* Registration cat tabs */
  .cat-tabs { flex-direction: column; }
  /* Form row */
  .form-row { grid-template-columns: 1fr; }
}

/* ─────────────────────────────────────────────────────────
   FACULTY PHOTOS — BLACK & WHITE
───────────────────────────────────────────────────────── */
.fac-photo-bw img {
  filter: grayscale(100%);
  transition: filter 0.35s ease;
}
.fac-photo-bw:hover img,
.fac-card:hover .fac-photo-bw img {
  filter: grayscale(0%);
}