:root {
  color-scheme: dark;
  --bg: #030711;
  --bg-alt: #0a1630;
  --panel: rgba(7, 17, 35, 0.85);
  --glow: #23bfff;
  --accent: #8ef5ff;
  --text: #f2f4ff;
  --muted: #a0accf;
  --border: rgba(255, 255, 255, 0.12);
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #0a1b3f 0%, #030711 50%, #01030a 100%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

main {
  width: min(1200px, 90vw);
  margin: 0 auto;
  padding-bottom: 6rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 5vw;
  background: rgba(3, 7, 17, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo-lockup {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.logo-lockup a {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.solid-logo {
  width: 42px;
  height: auto;
  object-fit: contain;
}

.logo-lockup .session-mark {
  color: var(--glow);
}

.logo-lockup .divider {
  opacity: 0.4;
}

nav {
  display: flex;
  gap: 1rem;
  font-size: 0.95rem;
}

nav a {
  color: var(--muted);
  font-weight: 500;
}

.cta {
  background: linear-gradient(90deg, #23bfff, #7d6bff);
  color: #01030a;
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(35, 191, 255, 0.3);
  transition: transform 0.2s ease;
}

.cta:hover {
  transform: translateY(-2px);
}

.ghost {
  border: 1px solid var(--border);
  padding: 0.65rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  color: var(--text);
}

.hero {
  margin: 3rem auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  align-items: stretch;
}

.hero-content {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: clamp(1.5rem, 2vw, 2.5rem);
  border-radius: 1.25rem;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.45);
}

.hero-card {
  background: linear-gradient(180deg, rgba(20, 60, 120, 0.9), rgba(3, 7, 17, 0.95));
  border: 1px solid rgba(35, 191, 255, 0.4);
  padding: 1.75rem;
  border-radius: 1.25rem;
}

.hero h1 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  margin: 0.5rem 0 1rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.8rem;
  color: var(--muted);
}

.lede {
  font-size: 1.1rem;
  color: #e1e7ff;
}

.hero-actions {
  margin: 1.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.session-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
}

.session-facts dt {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.session-facts dd {
  margin: 0.35rem 0 0;
}

.hero-card h2 {
  margin-top: 0;
  font-size: 1.4rem;
}

.hero-card .note,
.format-card .note {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 3rem auto;
}

.grid article,
.format-card,
.requirements aside {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: 1.25rem;
}

.organiser {
  margin: 4rem auto;
}

.organiser-card {
  display: flex;
  gap: 2rem;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.75rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.organiser-card img {
  width: 180px;
  height: 180px;
  border-radius: 1rem;
  object-fit: cover;
  border: 2px solid rgba(142, 245, 255, 0.6);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.organiser h2 {
  margin: 0.25rem 0 0.75rem;
}

.organiser-links {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.organiser-links a {
  font-weight: 600;
}

.grid h3,
.format h2,
.requirements h2,
.timeline h2,
.partners h2,
.submission h2 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  margin-top: 0.25rem;
}

.grid ul,
.format-list,
.requirements .checklist,
.requirements aside ul,
.submission ul {
  padding-left: 1.1rem;
}

.grid li,
.format-list li,
.requirements li,
.submission li {
  margin-bottom: 0.4rem;
}

.format {
  display: flex;
  gap: 2rem;
  margin: 4rem auto;
  align-items: stretch;
}

.format-copy,
.requirements > div,
.submission-copy {
  flex: 2;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.75rem;
}

.format-card,
.requirements aside {
  flex: 1;
}

.timeline {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.75rem;
  margin: 4rem auto;
}

.timeline ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline li {
  border-left: 2px solid rgba(142, 245, 255, 0.3);
  padding: 0.75rem 1rem;
  margin-left: 0.5rem;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 1.1rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 10px var(--glow);
}

.timeline span {
  display: inline-block;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.requirements {
  display: flex;
  gap: 2rem;
  margin: 4rem auto;
}

.requirements aside ul {
  list-style: square;
}

.partners {
  margin: 4rem auto;
  text-align: center;
}

.logo-row {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  align-items: center;
}

.logo-row figure {
  margin: 0;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
  border-radius: 1rem;
}

.logo-row img {
  width: 120px;
  height: auto;
  display: block;
  margin: 0 auto 0.75rem;
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.6));
}

.partners figcaption {
  font-weight: 600;
}

.submission {
  display: flex;
  gap: 2rem;
  margin: 4rem auto;
}

.form-frame {
  flex: 1.2;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-frame h2 {
  margin: 0;
  text-align: center;
}

.form-frame iframe {
  flex: 1;
  width: 100%;
  min-height: 600px;
  height: 100%;
  border: none;
  border-radius: 0.75rem;
  background: #fff;
}

footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
}

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

  .format,
  .requirements,
  .submission {
    flex-direction: column;
  }

  .site-header {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
  }

  nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .organiser-card {
    flex-direction: column;
    text-align: center;
  }

  .organiser-card img {
    width: 140px;
    height: 140px;
  }
}