/* ============================================================
   CosmicExplosions 2026 — Shared Stylesheet
   Colour palette:
     Navy:          #1a2744
     Cambridge blue:#003f7f
     Accent blue:   #4a7fb5
     Gold:          #c9a227
     Light gold:    #f0d980
     White:         #ffffff
     Light grey:    #f4f6f9
     Mid grey:      #6b7280
     Border grey:   #dde2ea
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1a2744;
  background: #ffffff;
}

a {
  color: #003f7f;
  text-decoration: none;
}
a:hover {
  color: #c9a227;
  text-decoration: underline;
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: 'Playfair Display', serif;
  line-height: 1.25;
  color: #1a2744;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem);   font-weight: 600; margin-bottom: 0.5rem; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* ---------- Layout ---------- */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 3.5rem 0;
}

.section--grey {
  background: #f4f6f9;
}

/* ---------- Navigation ---------- */
.site-nav {
  background: #1a2744;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav-brand {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: #c9a227;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.nav-brand:hover {
  color: #f0d980;
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 0.25rem;
}

.nav-links a {
  color: #cdd6e8;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
  background: #c9a227;
  color: #1a2744;
  text-decoration: none;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: #cdd6e8;
  border-radius: 2px;
  transition: all 0.3s;
}

@media (max-width: 700px) {
  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #1a2744;
    padding: 0.75rem 1.5rem 1.25rem;
    gap: 0.15rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 0.55rem 0.85rem;
    font-size: 1rem;
  }
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #1a2744 0%, #003f7f 60%, #1a3a5c 100%);
  color: #ffffff;
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}

/* Subtle star-field texture */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.25) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.15) 1px, transparent 1px),
    radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 120px 120px, 80px 80px, 50px 50px;
  background-position: 0 0, 40px 40px, 20px 60px;
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: #c9a227;
  margin-bottom: 0.75rem;
}

.hero h1 {
  color: #ffffff;
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 0.4rem;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: #a3c4e8;
  margin-bottom: 1.5rem;
  font-weight: 300;
}

.hero-desc {
  max-width: 680px;
  color: #cdd6e8;
  font-size: 1rem;
  margin-bottom: 2rem;
  line-height: 1.75;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(201,162,39,0.4);
  color: #f0d980;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.35rem 0.85rem;
  border-radius: 20px;
}

/* ---------- Info Cards ---------- */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.info-card {
  background: #ffffff;
  border: 1px solid #dde2ea;
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(26,39,68,0.06);
  transition: box-shadow 0.2s, transform 0.2s;
}
.info-card:hover {
  box-shadow: 0 6px 20px rgba(26,39,68,0.12);
  transform: translateY(-2px);
}

.info-card-icon {
  font-size: 1.6rem;
  margin-bottom: 0.6rem;
}

.info-card h3 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #6b7280;
  margin-bottom: 0.35rem;
}

.info-card p {
  font-size: 0.95rem;
  color: #1a2744;
  font-weight: 500;
  margin: 0;
}

/* ---------- Section headings ---------- */
.section-heading {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  margin-bottom: 0.5rem;
}

.section-heading p {
  color: #6b7280;
  max-width: 600px;
  margin: 0 auto;
}

.divider {
  width: 50px;
  height: 3px;
  background: #c9a227;
  margin: 0.75rem auto 1rem;
  border-radius: 2px;
}

/* ---------- Closed banner ---------- */
.banner {
  border-radius: 8px;
  padding: 1rem 1.5rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.93rem;
}

.banner--warning {
  background: #fff8e1;
  border: 1px solid #c9a227;
  color: #7a5c00;
}

.banner--info {
  background: #e8f0fb;
  border: 1px solid #4a7fb5;
  color: #1a3a6c;
}

.banner-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 0.1rem; }

/* ---------- Organisers ---------- */
.organiser-card {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background: #ffffff;
  border: 1px solid #dde2ea;
  border-radius: 10px;
  padding: 1.25rem 1.75rem;
  box-shadow: 0 2px 8px rgba(26,39,68,0.06);
}
.organiser-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #1a2744;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
  font-size: 1.3rem;
  color: #c9a227;
  font-weight: 700;
  flex-shrink: 0;
}
.organiser-info h4 { font-size: 1rem; margin-bottom: 0.1rem; }
.organiser-info p  { font-size: 0.85rem; color: #6b7280; margin: 0; }
.organiser-info a  { color: #003f7f; }

/* ---------- Programme ---------- */
.programme-day {
  margin-bottom: 3rem;
}

.programme-day-header {
  background: #1a2744;
  color: #ffffff;
  border-radius: 8px 8px 0 0;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.programme-day-header h3 {
  color: #ffffff;
  font-size: 1.05rem;
  margin: 0;
}

.programme-day-header .day-date {
  color: #c9a227;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.programme-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  border: 1px solid #dde2ea;
  border-top: none;
  border-radius: 0 0 8px 8px;
  overflow: hidden;
}

.programme-table th {
  background: #f4f6f9;
  padding: 0.6rem 1rem;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: #6b7280;
  border-bottom: 1px solid #dde2ea;
}

.programme-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #edf0f5;
  vertical-align: top;
}

.programme-table tr:last-child td {
  border-bottom: none;
}

.programme-table .time-col {
  width: 130px;
  font-weight: 600;
  color: #1a2744;
  white-space: nowrap;
  font-size: 0.85rem;
}

.programme-table .speaker {
  font-weight: 600;
  color: #003f7f;
}

.programme-table .title {
  font-style: italic;
  color: #374151;
}

.programme-table .tbc {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #fbbf24;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

/* Row type colours */
.row-talk        { background: #eff6ff; }
.row-demo        { background: #f0fdf4; }
.row-redback     { background: #fffbeb; }
.row-discussion  { background: #fff7ed; }
.row-break       { background: #f9fafb; }
.row-social      { background: #faf5ff; }
.row-lunch       { background: #f9fafb; }

/* Type pill */
.type-pill {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 12px;
  white-space: nowrap;
}

.pill-talk       { background: #bfdbfe; color: #1e40af; }
.pill-demo       { background: #bbf7d0; color: #166534; }
.pill-redback    { background: #fde68a; color: #78350f; }
.pill-discussion { background: #fed7aa; color: #92400e; }
.pill-break      { background: #e5e7eb; color: #6b7280; }
.pill-social     { background: #e9d5ff; color: #6b21a8; }
.pill-lunch      { background: #e5e7eb; color: #6b7280; }

/* Legend */
.programme-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
  align-items: center;
}
.legend-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: #6b7280;
  margin-right: 0.25rem;
}

/* ---------- Participants Table ---------- */
.participants-table-wrap {
  overflow-x: auto;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(26,39,68,0.08);
}

.participants-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 600px;
}

.participants-table thead th {
  background: #1a2744;
  color: #cdd6e8;
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.participants-table tbody tr {
  border-bottom: 1px solid #edf0f5;
  transition: background 0.15s;
}
.participants-table tbody tr:hover {
  background: #f0f4fb;
}
.participants-table tbody tr:last-child {
  border-bottom: none;
}

.participants-table td {
  padding: 0.65rem 1rem;
  vertical-align: middle;
  color: #1a2744;
}

.participants-table td.name {
  font-weight: 600;
}

.presenting-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.18rem 0.55rem;
  border-radius: 12px;
  white-space: nowrap;
}
.presenting-talk { background: #bfdbfe; color: #1e40af; }
.presenting-demo { background: #bbf7d0; color: #166534; }
.presenting-both { background: #fde68a; color: #92400e; }
.presenting-discussion { background: #fed7aa; color: #92400e; }
.presenting-no   { background: #f3f4f6; color: #9ca3af; }
.presenting-org  { background: #e9d5ff; color: #6b21a8; }
.presenting-tbc  { background: #fef3c7; color: #92400e; }

/* ---------- Logistics ---------- */
.logistics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 700px) {
  .logistics-grid { grid-template-columns: 1fr; }
}

.logistics-card {
  background: #ffffff;
  border: 1px solid #dde2ea;
  border-radius: 10px;
  padding: 1.75rem;
  box-shadow: 0 2px 8px rgba(26,39,68,0.06);
}

.logistics-card--full {
  grid-column: 1 / -1;
}

.logistics-card h3 {
  font-size: 1.05rem;
  color: #1a2744;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logistics-card h3 .icon {
  font-size: 1.2rem;
}

.logistics-card ul {
  list-style: none;
  padding: 0;
}

.logistics-card ul li {
  padding: 0.35rem 0;
  padding-left: 1.2rem;
  position: relative;
  font-size: 0.93rem;
  color: #374151;
  border-bottom: 1px solid #f3f4f6;
}
.logistics-card ul li:last-child { border-bottom: none; }

.logistics-card ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: #c9a227;
  font-weight: 700;
}

.logistics-card p {
  font-size: 0.93rem;
  color: #374151;
}

.map-placeholder {
  background: #f4f6f9;
  border: 2px dashed #dde2ea;
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  color: #6b7280;
  font-size: 0.9rem;
  margin-top: 1rem;
}
.map-placeholder strong { display: block; color: #1a2744; margin-bottom: 0.25rem; }

/* ---------- Footer ---------- */
.site-footer {
  background: #1a2744;
  color: #8899bb;
  padding: 2rem 0;
  font-size: 0.85rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand {
  font-family: 'Playfair Display', serif;
  color: #c9a227;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}
.footer-links a {
  color: #8899bb;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: #c9a227;
  text-decoration: none;
}

.footer-copy {
  width: 100%;
  margin-top: 0.75rem;
  text-align: center;
  color: #4a5a7a;
  font-size: 0.78rem;
  border-top: 1px solid #2a3a5a;
  padding-top: 0.75rem;
}

/* ---------- Utilities ---------- */
.text-gold   { color: #c9a227; }
.text-muted  { color: #6b7280; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

.note {
  font-size: 0.85rem;
  color: #6b7280;
  font-style: italic;
  margin-top: 0.5rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .programme-table .time-col { width: 100px; }
}

@media (max-width: 600px) {
  .hero { padding: 3.5rem 0 2.5rem; }
  .section { padding: 2.5rem 0; }
  .info-grid { grid-template-columns: 1fr 1fr; }
  .programme-day-header { flex-direction: column; gap: 0.1rem; }
  .programme-table { font-size: 0.82rem; }
  .programme-table .time-col { width: 80px; }
  .programme-table td { padding: 0.6rem 0.6rem; }
}