/* Modern, clean academic style */
:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-600: #4b5563;
  --gray-800: #1f2937;
  --accent: #0d9488;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background: white;
}

h1, h2, h3 {
  font-family: 'Source Serif 4', serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.8rem; margin-bottom: 0.5rem; }
h2 { font-size: 2rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.3rem; margin: 1rem 0 0.5rem; }

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

.section {
  padding: 4rem 0;
}

.alt-bg {
  background: var(--gray-50);
}

ul, ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

li {
  margin-bottom: 0.25rem;
  line-height: 1.6;
}

.section ul {
  text-align: left;
}

/* Navbar */
.navbar {
  background: white;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 10;
}

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

.nav-brand {
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--primary);
  text-decoration: none;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  padding-left: 0;
  margin: 0;
}

.nav-menu a {
  text-decoration: none;
  color: var(--gray-800);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-menu a:hover {
  color: var(--primary-light);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.8rem;
  cursor: pointer;
  color: var(--primary);
  padding: 0 0.5rem;
}

/* Hero */
.hero {
  position: relative;
  width: 100%;
  min-height: 550px;
  background-image: url('static/banner.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.9rem;
  color: white;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.3rem;
  color: white;
  margin: 1rem 0 0.5rem;
}

.date-location {
  font-size: 1.1rem;
  color: white;
  margin-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  gap: 0 0.25rem;
}

.separator {
  display: inline;
}

.sponsor-logo-top {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 3;
  max-height: 60px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.hero h1 {
  color: white;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

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

.speaker-card {
  background: white;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px -2px rgba(0,0,0,0.05);
  border: 1px solid #e5e7eb;
}

.speaker-photo {
  width: 100%;
  aspect-ratio: 1/1;
  background: #dbeafe;
  border-radius: 50%;
  margin-bottom: 1rem;
  border: 2px solid white;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  overflow: hidden;
}

.speaker-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-card h3 {
  margin-top: 0;
  font-size: 1.3rem;
}

.affiliation {
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

/* Schedule table */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.schedule-table td {
  padding: 0.75rem 0.5rem;
  border-bottom: 1px solid #e5e7eb;
}

.schedule-table td:first-child {
  font-weight: 600;
  width: 100px;
  color: var(--primary);
}

.schedule-note {
  color: var(--gray-600);
  font-style: italic;
}

/* Organizers grid */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.organizer-card {
  text-align: center;
  background: white;
  padding: 1.5rem 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px -2px rgba(0,0,0,0.05);
  border: 1px solid #e5e7eb;
  transition: transform 0.2s;
}

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

.org-photo {
  width: 120px;
  height: 120px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: #dbeafe;
  border: 3px solid white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  overflow: hidden;
}

.org-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.organizer-card h3 {
  margin: 0.5rem 0 0.25rem;
  font-size: 1.2rem;
}

.org-affiliation {
  font-weight: 500;
  color: var(--primary);
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.org-email {
  font-size: 0.8rem;
  color: var(--gray-600);
  word-break: break-all;
}

.keywords {
  margin-top: 2rem;
  padding: 1rem;
  background: white;
  border-radius: 8px;
  border-left: 4px solid var(--accent);
}

.mt-2 { margin-top: 1.5rem; }

.sponsor-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.sponsor-logo {
  max-width: 300px;
  width: 100%;
  height: auto;
  display: block;
}

footer {
  background: var(--gray-800);
  color: #e5e7eb;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

footer a {
  color: #93c5fd;
  text-decoration: none;
}
.org-social {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
  flex-wrap: nowrap; /* ← never wrap */
}

.org-social a {
  color: #2c3e50;
  font-size: 1.2rem;
  transition: color 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0; /* ← prevent icons from shrinking weirdly */
}

.org-social a:hover {
  color: #0077b6;
}

/* Tablet/mobile: tighten up the icons to fit in narrow 2-col cards */
@media (max-width: 768px) {
  .org-social {
    gap: 8px;
  }

  .org-social a {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .org-social {
    gap: 6px;
  }

  .org-social a {
    font-size: 0.95rem;
  }
}

/* ---------- Mobile / Responsive ---------- */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.8rem; }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0.5rem;
    padding: 1rem 0 0.5rem;
    background: white;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu li {
    width: 100%;
    text-align: center;
  }

  .nav-menu a {
    display: block;
    padding: 0.5rem;
  }

  .hero {
    min-height: 450px;
  }

  .hero .container {
    padding-top: 4rem;
  }

  .sponsor-logo-top {
    max-height: 45px;
    top: 10px;
    left: 10px;
  }

  .hero h1 {
    font-size: 2rem;
    margin-top: 0.5rem;
  }

  .subtitle {
    font-size: 1.1rem;
  }

  /* Date location line break */
  .separator {
    display: none;
  }
  .workshop-part {
    display: block;
    width: 100%;
  }

  .speakers-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .organizers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .organizer-card {
    padding: 1rem 0.75rem;
  }

  .org-photo {
    width: 100px;
    height: 100px;
  }

  .organizer-card h3 {
    font-size: 1rem;
  }

  .org-affiliation {
    font-size: 0.8rem;
  }

  .org-email {
    font-size: 0.7rem;
  }

  .schedule-table td:first-child {
    width: 80px;
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 400px;
  }

  .hero .container {
    padding-top: 4.5rem;
  }

  .sponsor-logo-top {
    max-height: 35px;
    top: 8px;
    left: 8px;
  }

  h1 { font-size: 1.8rem; }

  .organizers-grid {
    gap: 0.75rem;
  }
}

/* Date/Schedule table */
.date-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  border-radius: 10px;
  overflow: hidden;
}

.date-table thead tr {
  background: var(--primary);
  color: white;
}

.date-table thead th {
  padding: 0.85rem 1.25rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.date-table tbody tr {
  transition: background 0.15s;
}

.date-table tbody tr:nth-child(even) {
  background: var(--gray-50);
}

.date-table tbody tr:nth-child(odd) {
  background: white;
}

.date-table tbody tr:hover {
  background: #dbeafe;
}

.date-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid #e5e7eb;
}

.date-table td:first-child {
  font-weight: 600;
  width: 130px;
  color: var(--primary);
  white-space: nowrap;
  border-right: 2px solid #e5e7eb;
}

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

.date-table tr.break-row td {
  color: var(--gray-600);
  font-style: italic;
  background: #fef9c3 !important;
}

.date-table tr.break-row td:first-child {
  color: var(--gray-600);
}

@media (max-width: 768px) {
  .date-table td:first-child {
    width: 90px;
    font-size: 0.85rem;
  }

  .date-table td {
    padding: 0.7rem 0.85rem;
  }
}

/* Important Dates table */
.important-dates-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  border-radius: 10px;
  overflow: hidden;
}

.important-dates-table thead tr {
  background: var(--primary);
  color: white;
}

.important-dates-table thead th {
  padding: 0.85rem 1.25rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.important-dates-table tbody tr {
  transition: background 0.15s;
}

.important-dates-table tbody tr:nth-child(even) {
  background: var(--gray-50);
}

.important-dates-table tbody tr:nth-child(odd) {
  background: white;
}

.important-dates-table tbody tr:hover {
  background: #dbeafe;
}

.important-dates-table td {
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid #e5e7eb;
}

.important-dates-table td:first-child {
  font-weight: 600;
  width: 220px;
  color: var(--primary);
  white-space: nowrap;
  border-right: 2px solid #e5e7eb;
}

.important-dates-table tbody tr:last-child td {
  border-bottom: none;
}

@media (max-width: 768px) {
  .important-dates-table td:first-child {
    width: auto;
    font-size: 0.85rem;
    white-space: normal;
  }

  .important-dates-table td {
    padding: 0.7rem 0.85rem;
  }
}

p {
  margin-bottom: 1em; /* space below each paragraph */
}