/* Base layout */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #101827;
  background-color: #f5f7fb;
}

body {
  line-height: 1.6;
}

a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: #0f172a;
}

p {
  margin-top: 0;
}

main {
  display: block;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #0e2047 0%, #123670 48%, #0a1733 100%);
  color: #f3f6ff;
  padding: 3.8rem 1.5rem 3.2rem;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 15% 18%, rgba(255, 255, 255, 0.16), transparent 26%),
    radial-gradient(circle at 85% 12%, rgba(255, 255, 255, 0.12), transparent 24%),
    radial-gradient(circle at 55% 78%, rgba(255, 255, 255, 0.1), transparent 30%),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.04) 0, rgba(255, 255, 255, 0.04) 8px, transparent 8px, transparent 16px);
  pointer-events: none;
  opacity: 0.9;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 10%;
  width: 120%;
  height: 220px;
  background: radial-gradient(ellipse at top, rgba(255, 255, 255, 0.08), transparent 55%);
  filter: blur(6px);
  transform: rotate(-2deg);
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2.1rem, 3vw + 1rem, 2.8rem);
  margin-bottom: 0.75rem;
  color: #fdf7eb;
  letter-spacing: 0.01em;
  text-shadow: 0 12px 32px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 0, 0, 0.35);
}

.tag {
  display: inline-block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.65rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.28);
  backdrop-filter: blur(4px);
  margin-bottom: 0.9rem;
}

.subtitle {
  max-width: 40rem;
  font-size: 1rem;
  margin-bottom: 1.3rem;
  color: #e9f0ff;
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.26);
}

.button {
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 500;
  font-size: 0.92rem;
  margin-right: 0.5rem;
  margin-top: 0.4rem;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    box-shadow 0.15s ease, transform 0.08s ease;
}

.button.primary {
  background: #ffffff;
  color: #0b1120;
  border-color: rgba(226, 232, 240, 0.8);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.18);
}

.button.primary:hover {
  background: #e5e7eb;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(15, 23, 42, 0.18);
}

.button.ghost {
  background: transparent;
  color: #e5e7eb;
  border-color: rgba(191, 219, 254, 0.5);
}

.button.ghost:hover {
  background: rgba(15, 23, 42, 0.46);
  text-decoration: none;
}

/* Sections */
.section {
  padding: 2.75rem 1.5rem;
}

.section.alt {
  background-color: #ffffff;
}

.section-inner {
  max-width: 960px;
  margin: 0 auto;
}

.section h2 {
  font-size: 1.75rem;
  margin-bottom: 0.9rem;
}

.section h3 {
  font-size: 1.15rem;
  margin-top: 1.4rem;
  margin-bottom: 0.4rem;
}

.section p + p {
  margin-top: 0.6rem;
}

.note {
  font-size: 0.9rem;
  color: #4b5563;
  background-color: #e5edff;
  border-radius: 0.6rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid rgba(129, 140, 248, 0.4);
  margin-top: 0.9rem;
}

ul,
ol {
  padding-left: 1.3rem;
}

li + li {
  margin-top: 0.25rem;
}

/* Two-column layout */
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 2.25rem;
  align-items: flex-start;
}

@media (max-width: 768px) {
  .two-column {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero {
    padding-top: 2.6rem;
    padding-bottom: 2.4rem;
  }
}

/* Dates grid */
.dates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.1rem;
  margin-top: 1.3rem;
}

.date-card {
  background-color: #ffffff;
  border-radius: 0.75rem;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.04);
}

.date-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #6b7280;
  margin-bottom: 0.25rem;
}

.date-value {
  font-weight: 600;
  color: #111827;
}

/* Inline dates block */
.inline-dates {
  margin-top: 1.1rem;
  padding: 1rem 1.1rem;
  background-color: #e5edff;
  border: 1px solid rgba(129, 140, 248, 0.35);
  border-radius: 0.8rem;
}

.inline-dates h3 {
  margin: 0 0 0.5rem;
}

.inline-dates ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
  display: grid;
  gap: 0.35rem;
}

.inline-dates li {
  font-size: 0.98rem;
}

/* Organizers */
.organizers-title {
  text-align: center;
  margin-bottom: 0.4rem;
}

.organizers-full {
  max-width: 1200px;
  width: calc(100% - 2rem);
  margin: 0 auto;
}

.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 1.4rem;
}

.organizer-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: #ffffff;
  border-radius: 1.05rem;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.45);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.07);
}

.organizer-photo {
  width: 100%;
  height: 420px;
  object-fit: cover;
  background: #e5e7eb;
  display: block;
}

.organizer-info {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1rem 1.2rem 1.3rem;
}

.organizer-name {
  font-weight: 700;
  margin: 0;
  font-size: 1.15rem;
}

.organizer-affiliation {
  margin: 0.25rem 0 0;
  color: #4b5563;
  font-size: 0.97rem;
}

.contact-block {
  margin-top: 1.8rem;
  text-align: center;
}

.contact {
  font-weight: 500;
}

.contact a {
  word-break: break-all;
}

@media (max-width: 640px) {
  .organizer-photo {
    height: 300px;
  }
}

/* Footer */
.footer {
  background-color: #020617;
  color: #9ca3af;
  padding: 1.8rem 1.5rem 2rem;
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  font-size: 0.9rem;
}

.footer .small {
  font-size: 0.8rem;
  color: #6b7280;
}