/* Color Palette */
:root {
  --cream: #FAFAF8;
  --dark-blue: #0F3A6E;
  --light-blue: #4A6FA5;
  --accent: #164DA8;
  --orange: #E8732D;
  --gray: #6B7280;
  --light-gray: #F8F9FA;
  --border-gray: #E5E7EB;
  --dark-gray: #1F2937;
  --white: #FFFFFF;
  
  /* Typography */
  --font-display: 'Georgia', 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --section-padding: 80px;
  --container-max: 1200px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 40px -5px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  height: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--cream);
  color: var(--dark-gray);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 40px;
}

/* Navigation */
nav {
  background-color: var(--white);
  color: var(--dark-gray);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-gray);
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.95);
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 40px;
}

nav .logo {
  font-family: var(--font-display);
  font-size: 1.6em;
  font-weight: 600;
  color: var(--dark-blue);
  text-decoration: none;
  letter-spacing: -0.02em;
}

nav .nav-links {
  list-style: none;
  display: flex;
  gap: 40px;
}

nav .nav-links a {
  color: var(--gray);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95em;
  transition: color var(--transition-fast);
  position: relative;
  padding: 4px 0;
}

nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--dark-blue);
  transition: width var(--transition-base);
}

nav .nav-links a:hover {
  color: var(--dark-blue);
}

nav .nav-links a:hover::after {
  width: 100%;
}

/* Page header section */
.page-title {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--light-blue) 100%);
  color: var(--white);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-title::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.page-title .container {
  max-width: var(--container-max);
  position: relative;
  z-index: 1;
}

.page-title h1 {
  font-family: var(--font-display);
  font-size: 2.75em;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin: 0;
}

/* Hero section */
.hero {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--light-blue) 100%);
  color: var(--white);
  text-align: center;
  padding: 0;
  position: relative;
}

.hero-content {
  padding: 100px 0 120px 0;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-family: var(--font-display);
  font-size: 3.25em;
  margin-bottom: 20px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.hero-content p {
  font-size: 1.25em;
  margin-bottom: 25px;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
  line-height: 1.7;
}

/* Logo image area */
.logo-image {
  background-color: var(--white);
  padding: 0;
  text-align: center;
  margin-bottom: 50px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-gray);
  overflow: hidden;
}

.logo-image img {
  max-width: 100%;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  object-fit: contain;
}

/* Main content */
main {
  background-color: var(--cream);
  padding: var(--section-padding) 0;
  min-height: 500px;
}

main .container {
  max-width: 900px;
}

main h2 {
  font-family: var(--font-display);
  font-size: 2.25em;
  margin-bottom: 30px;
  color: var(--dark-blue);
  font-weight: 600;
  letter-spacing: -0.02em;
}

main p {
  margin-bottom: 24px;
  color: var(--gray);
  line-height: 1.8;
  font-size: 1.1em;
}

/* Forms */
form {
  max-width: 700px;
  background: var(--white);
  padding: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-gray);
}

form label {
  display: block;
  margin-bottom: 8px;
  margin-top: 24px;
  font-weight: 600;
  color: var(--dark-blue);
  font-size: 0.95em;
  letter-spacing: 0.01em;
}

form label:first-of-type {
  margin-top: 0;
}

form input[type="text"],
form input[type="email"],
form input[type="file"],
form select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  font-size: 1em;
  font-family: inherit;
  transition: all var(--transition-fast);
  background-color: var(--light-gray);
}

form input[type="text"]:focus,
form input[type="email"]:focus,
form input[type="file"]:focus,
form select:focus {
  outline: none;
  border-color: var(--dark-blue);
  box-shadow: 0 0 0 4px rgba(15, 58, 110, 0.08);
  background-color: var(--white);
}

form button[type="submit"] {
  margin-top: 32px;
  padding: 16px 36px;
  background-color: var(--dark-blue);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}

form button[type="submit"]:hover {
  background-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

#form-message {
  margin-top: 24px;
  padding: 16px;
  border-radius: 8px;
  font-weight: 500;
  text-align: center;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 30px;
  box-shadow: var(--shadow-md);
  border-radius: 12px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--border-gray);
}

table thead {
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--light-blue) 100%);
  color: var(--white);
}

table th {
  padding: 18px 20px;
  font-weight: 600;
  text-align: left;
  font-size: 0.9em;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-gray);
  color: var(--dark-gray);
}

table tr {
  transition: background-color var(--transition-fast);
}

table tr:hover {
  background-color: var(--light-gray);
}

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

table a {
  color: var(--dark-blue);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

table a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.approve-btn {
  padding: 10px 18px;
  background-color: var(--dark-blue);
  color: var(--white);
  border: none;
  border-radius: 6px;
  font-size: 0.875em;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}

.approve-btn:hover {
  background-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 18px 42px;
  background-color: var(--dark-blue);
  color: var(--white);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.05em;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
  box-shadow: var(--shadow-md);
}

.cta-button:hover {
  background-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Footer */
footer {
  background-color: var(--dark-blue);
  color: var(--white);
  padding: 50px 0;
  text-align: center;
  margin-top: 0;
}

footer .container {
  max-width: var(--container-max);
}

footer p {
  margin: 0;
  opacity: 0.8;
  font-size: 0.95em;
  letter-spacing: 0.01em;
}

/* Admin login page */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
  padding: 40px 20px;
}

.login-box {
  background: var(--white);
  padding: 50px 45px;
  border-radius: 16px;
  box-shadow: var(--shadow-xl);
  max-width: 420px;
  width: 100%;
  border: 1px solid var(--border-gray);
}

.login-box h2 {
  font-family: var(--font-display);
  text-align: center;
  color: var(--dark-blue);
  margin-bottom: 35px;
  font-size: 1.75em;
  font-weight: 600;
}

/* Admin Panel Styles */
.admin-container {
  max-width: 100% !important;
  padding: 0 15px !important;
}

.admin-container table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.admin-container th {
  background: var(--dark-blue);
  color: white;
  font-weight: 600;
  padding: 12px 8px;
  text-align: center;
  vertical-align: middle;
  font-size: 0.9em;
  border: 1px solid #d1d5db;
}

.admin-container td {
  padding: 10px 8px;
  border: 1px solid #d1d5db;
  text-align: center;
  vertical-align: middle;
  background: #f8fafc;
}

.admin-container tr:hover td {
  background-color: #e2e8f0;
}

.admin-container tr:nth-child(even) td {
  background-color: #f1f5f9;
}

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 25px;
  padding: 20px;
  background: var(--white);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-gray);
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.filter-group label {
  font-weight: 600;
  color: var(--dark-blue);
  font-size: 0.9em;
}

.filter-group select {
  padding: 8px 12px;
  border: 1px solid var(--border-gray);
  border-radius: 6px;
  font-size: 0.9em;
  background: var(--white);
  cursor: pointer;
}

.btn-filter {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.9em;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-filter:not(.btn-secondary) {
  background: var(--dark-blue);
  color: var(--white);
  border: none;
}

.btn-filter:not(.btn-secondary):hover {
  background: var(--accent);
}

.btn-filter.btn-secondary {
  background: var(--light-gray);
  color: var(--dark-gray);
  border: 1px solid var(--border-gray);
}

/* Action buttons */
.action-btn {
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.8em;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  margin: 2px;
}

.action-btn.approve {
  background: #D1FAE5;
  color: #065F46;
}

.action-btn.approve:hover {
  background: #A7F3D0;
}

.action-btn.reject {
  background: #FEE2E2;
  color: #991B1B;
}

.action-btn.reject:hover {
  background: #FECACA;
}

.action-btn.revoke {
  background: #FEF3C7;
  color: #92400E;
}

.action-btn.revoke:hover {
  background: #FDE68A;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: var(--white);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 90%;
}

.modal-content h3 {
  color: var(--dark-blue);
  margin-bottom: 20px;
  font-family: var(--font-display);
}

.modal-content textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px;
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1em;
  resize: vertical;
  margin-bottom: 20px;
}

.modal-content textarea:focus {
  outline: none;
  border-color: var(--dark-blue);
  box-shadow: 0 0 0 3px rgba(15, 58, 110, 0.1);
}

.modal-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* Status badges */
.status-badge {
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.85em;
  font-weight: 600;
  display: inline-block;
}

.status-badge.approved {
  background: #D1FAE5;
  color: #065F46;
}

.status-badge.pending {
  background: #FEF3C7;
  color: #92400E;
}

.status-badge.rejected {
  background: #FEE2E2;
  color: #991B1B;
}

.status-badge.revoked {
  background: #E5E7EB;
  color: #374151;
}

/* Utilities */
.text-muted {
  color: var(--gray);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--light-gray);
  color: var(--dark-blue);
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--transition-base);
  font-weight: 500;
  border: 1px solid var(--border-gray);
}

.btn-secondary:hover {
  background-color: var(--white);
  border-color: var(--dark-blue);
  box-shadow: var(--shadow-sm);
}

/* Notice boxes */
.notice-box {
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
  border: 1px solid #C7D2FE;
  border-radius: 12px;
  padding: 24px 28px;
  margin-bottom: 20px;
}

.notice-box h3 {
  font-family: var(--font-display);
  color: var(--dark-blue);
  margin-bottom: 16px;
  font-size: 1.15em;
  font-weight: 600;
}

.notice-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.notice-box ul li {
  padding: 8px 0;
  color: var(--dark-gray);
  line-height: 1.6;
  padding-left: 8px;
  border-left: 3px solid var(--dark-blue);
  margin-bottom: 10px;
  background: rgba(255,255,255,0.5);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
}

.notice-box ul li:last-child {
  margin-bottom: 0;
}

.notice-box.notice-success {
  background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
  border-color: #6EE7B7;
}

.notice-box.notice-success p {
  margin: 0;
  color: #065F46;
}

/* Form enhancements */
.optional-label {
  font-weight: 400;
  color: var(--gray);
  font-size: 0.9em;
}

.field-hint {
  display: block;
  margin-top: 6px;
  font-size: 0.85em;
  color: var(--gray);
  font-weight: 400;
}

/* Conference intro styles */
.conference-intro {
  margin-bottom: 40px;
}

.lead-text {
  font-size: 1.25em;
  line-height: 1.8;
  color: var(--dark-gray);
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

/* Quick facts grid */
.quick-facts {
  display: grid;
  gap: 16px;
  margin-bottom: 50px;
  background: var(--white);
  padding: 30px;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-gray);
}

.fact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-gray);
}

.fact-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.fact-item:first-child {
  padding-top: 0;
}

.fact-emoji {
  font-size: 1.5em;
  line-height: 1;
  flex-shrink: 0;
}

.fact-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.fact-label {
  font-weight: 600;
  color: var(--dark-blue);
  font-size: 0.9em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.fact-value {
  color: var(--dark-gray);
  line-height: 1.5;
}

/* Content sections */
.content-section {
  margin-bottom: 50px;
  margin-top: 50px;
  padding-top: 40px;
  border-top: 1px solid var(--border-gray);
}

.content-section:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.content-section h2 {
  margin-bottom: 24px;
}

/* Question list */
.question-list {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.question-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--white);
  border-radius: 10px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-gray);
  line-height: 1.6;
}

.question-list li .emoji {
  font-size: 1.2em;
  flex-shrink: 0;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--light-blue) 100%);
  border-radius: 12px;
  color: var(--white);
}

.feature-emoji {
  font-size: 2em;
  flex-shrink: 0;
}

.feature-text {
  font-weight: 500;
  line-height: 1.5;
}

/* Participation options */
.participation-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 30px 0;
}

.participation-card {
  background: var(--white);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-gray);
  transition: all var(--transition-base);
  position: relative;
}

.participation-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Hover guidelines for active participation */
.participation-card-hover {
  cursor: pointer;
}

.poster-guidelines {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 10px;
  padding: 20px;
  background: #f0f9ff;
  border-left: 4px solid var(--dark-blue);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-base);
  z-index: 10;
  text-align: left;
}

.participation-card-hover:hover .poster-guidelines {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.poster-guidelines h4 {
  margin: 0 0 10px 0;
  color: var(--dark-blue);
  font-size: 14px;
  font-weight: 600;
}

.poster-guidelines ul {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.6;
  color: #374151;
}

.poster-guidelines li {
  margin-bottom: 5px;
}

.participation-number {
  font-size: 2em;
  display: block;
  margin-bottom: 16px;
}

.participation-card h3 {
  font-family: var(--font-display);
  color: var(--dark-blue);
  margin-bottom: 12px;
  font-size: 1.3em;
}

.participation-card p {
  color: var(--gray);
  margin-bottom: 20px;
  font-size: 0.95em;
}

.tba-badge {
  display: inline-block;
  background: var(--light-gray);
  color: var(--gray);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85em;
  font-weight: 600;
}

/* Announcement box */
.announcement-box {
  background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
  border: 1px solid #F59E0B;
  border-radius: 12px;
  padding: 20px 28px;
  text-align: center;
  margin-top: 30px;
}

.announcement-box p {
  margin: 0;
  color: #92400E;
  font-weight: 600;
}

/* Social links */
.social-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 24px 0;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--white);
  border: 1px solid var(--border-gray);
  border-radius: 8px;
  color: var(--dark-blue);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--dark-blue);
  color: var(--white);
  border-color: var(--dark-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.contact-email {
  margin-top: 20px;
}

.contact-email a {
  color: var(--dark-blue);
  font-weight: 500;
}

.contact-email a:hover {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --section-padding: 50px;
  }
  
  .container {
    padding: 0 20px;
  }
  
  nav .container {
    padding: 14px 20px;
    flex-direction: column;
    gap: 15px;
    align-items: center;
  }
  
  nav .logo {
    width: 100%;
    text-align: center;
    font-size: 1.5em;
    order: 1;
  }
  
  nav .nav-links {
    gap: 20px;
    justify-content: center;
    width: 100%;
    order: 2;
  }

  .page-title {
    padding: 40px 0;
  }

  .page-title h1 {
    font-size: 2em;
  }

  .hero-content {
    padding: 60px 0 80px 0;
  }

  .hero-content h1 {
    font-size: 2.25em;
  }

  .logo-image {
    padding: 0;
    margin-bottom: 40px;
  }

  .logo-image img {
    max-width: 100%;
    border-radius: 16px;
  }

  main h2 {
    font-size: 1.75em;
  }

  form {
    padding: 30px 25px;
  }

  table {
    font-size: 0.9em;
  }

  table th,
  table td {
    padding: 12px 14px;
  }
  
  .cta-button {
    padding: 16px 32px;
    font-size: 1em;
  }

  .lead-text {
    font-size: 1.1em;
  }

  .quick-facts {
    padding: 20px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .participation-options {
    grid-template-columns: 1fr;
  }

  .social-links {
    flex-direction: column;
  }

  .social-link {
    justify-content: center;
  }
}

/* Speakers Page Styles */
.speakers-grid {
  padding: 60px 0;
}

.speaker-card {
  display: flex;
  gap: 30px;
  margin-bottom: 50px;
  padding: 30px;
  background: white;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
}

.speaker-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.speaker-image {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--light-gray);
}

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

.speaker-info {
  flex: 1;
}

.speaker-info h2 {
  color: var(--dark-blue);
  font-size: 1.8em;
  margin-bottom: 5px;
}

.speaker-title {
  color: var(--gray);
  font-style: italic;
  margin-bottom: 3px;
}

.speaker-affiliation {
  color: var(--light-blue);
  font-weight: 600;
  margin-bottom: 15px;
}

.lecture-info {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid var(--border-gray);
}

.lecture-info h3 {
  color: var(--dark-blue);
  font-size: 1.3em;
  margin-bottom: 10px;
}

.lecture-abstract {
  color: var(--dark-gray);
  line-height: 1.7;
  margin-bottom: 15px;
}

.lecture-time {
  color: var(--orange);
  font-weight: 600;
}

.cta-section {
  background: var(--light-gray);
  padding: 60px 0;
  text-align: center;
}

.cta-section h2 {
  color: var(--dark-blue);
  font-size: 2em;
  margin-bottom: 15px;
}

.cta-section p {
  color: var(--gray);
  font-size: 1.1em;
  margin-bottom: 25px;
}

@media (max-width: 768px) {
  .speaker-card {
    flex-direction: column;
    text-align: center;
  }
  
  .speaker-image {
    width: 150px;
    height: 150px;
    margin: 0 auto;
  }
}