/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-details {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.detail-item svg {
    width: 24px;
    height: 24px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--bg-white);
    color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

/* Sections */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

/* Highlights */
.highlights {
    background: var(--bg-light);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.highlight-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.highlight-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.highlight-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.highlight-card p {
    color: var(--text-light);
}

/* Dates Section */
.dates-section {
    background: var(--bg-white);
}

.dates-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.date-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.date-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    white-space: nowrap;
    min-width: 150px;
    text-align: center;
}

.date-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.date-content p {
    color: var(--text-light);
}

/* Topics Section */
.topics-section {
    background: var(--bg-light);
}

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

.topic-category {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.topic-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.topic-category ul {
    list-style: none;
}

.topic-category li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 1.5rem;
}

.topic-category li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.25rem;
    opacity: 0.9;
}

/* Content Wrapper */
.content-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

/* About Page */
.about-section {
    margin-bottom: 3rem;
}

.about-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-section p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.objective-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.objective-card h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

.theme-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}

.theme-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.theme-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.audience-list {
    list-style: none;
    margin-top: 1rem;
}

.audience-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
}

.format-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.format-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.format-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Call for Papers */
.cfp-section {
    margin-bottom: 3rem;
}

.format-requirements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.requirement-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.requirement-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.template-download {
    text-align: center;
    margin: 2rem 0;
}

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

.topic-column ul {
    list-style: none;
    margin-top: 1rem;
}

.topic-column li {
    padding: 0.5rem 0;
    color: var(--text-light);
    position: relative;
    padding-left: 1.5rem;
}

.topic-column li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.process-steps {
    margin-top: 2rem;
}

.step-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: flex-start;
}

.step-number {
    background: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.step-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.dates-table {
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.date-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.date-row:last-child {
    border-bottom: none;
}

.date-label {
    font-weight: 600;
    color: var(--text-dark);
}

.date-value {
    color: var(--text-light);
    text-align: right;
}

.review-criteria {
    list-style: none;
    margin-top: 1rem;
}

.review-criteria li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
}

.submit-button {
    text-align: center;
    margin: 2rem 0;
}

/* Program Page */
.program-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.tab-btn {
    padding: 0.75rem 2rem;
    background: var(--bg-light);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn.active,
.tab-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.schedule-day {
    display: none;
}

.schedule-day.active {
    display: block;
}

.day-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    text-align: center;
}

.schedule-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    background: var(--bg-white);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.schedule-item.highlight {
    border-left-color: var(--accent-color);
    background: linear-gradient(to right, rgba(245, 158, 11, 0.1), var(--bg-white));
}

.schedule-time {
    font-weight: 700;
    color: var(--primary-color);
    min-width: 120px;
    font-size: 1.1rem;
}

.schedule-content h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.schedule-content p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.speaker-name {
    font-weight: 600;
    color: var(--primary-color);
}

.speaker-title {
    font-style: italic;
    color: var(--text-light);
}

.talk-title {
    font-weight: 600;
    color: var(--text-dark);
    margin: 0.5rem 0;
}

.schedule-content ul {
    margin-top: 0.5rem;
    padding-left: 1.5rem;
    color: var(--text-light);
}

/* Registration Page */
.fees-table {
    overflow-x: auto;
    margin: 2rem 0;
}

.fees-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.fees-table th {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.fees-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-dark);
}

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

.fees-table tr:nth-child(even) {
    background: var(--bg-light);
}

.note {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    color: var(--text-light);
}

.includes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.include-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.include-icon {
    background: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.include-item h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.include-item p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.payment-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.payment-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.notes-list {
    list-style: none;
    margin-top: 1rem;
}

.notes-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-light);
    padding-left: 1.5rem;
    position: relative;
}

.notes-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.register-button {
    text-align: center;
    margin: 2rem 0;
}

.contact-info {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 1rem;
}

/* Awards Page */
.awards-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.awards-intro h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.awards-intro p {
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.award-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary-color);
}

.award-card.featured {
    border-top-color: var(--accent-color);
    background: linear-gradient(to bottom, rgba(245, 158, 11, 0.05), var(--bg-white));
}

.award-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.award-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.award-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.award-details p {
    margin-bottom: 0.75rem;
    color: var(--text-light);
}

.award-details ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
    color: var(--text-light);
}

.award-details li {
    margin-bottom: 0.5rem;
}

.process-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.process-step {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.process-step h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.ceremony-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.ceremony-detail {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.ceremony-detail h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Contact Page */
.venue-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.venue-details h3 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.venue-address,
.venue-contact {
    margin-bottom: 1.5rem;
}

.venue-address p,
.venue-contact p {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

.map-placeholder {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 12px;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.map-placeholder p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

.transport-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.transport-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.transport-item p {
    margin-bottom: 0.75rem;
    color: var(--text-light);
}

.hotels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.hotel-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.hotel-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.hotel-item p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-top: 4px solid var(--primary-color);
}

.contact-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-card p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.committee-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.committee-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.committee-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.committee-item p {
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.contact-form {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-details {
        flex-direction: column;
        gap: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .venue-info {
        grid-template-columns: 1fr;
    }

    .date-item {
        flex-direction: column;
    }

    .date-badge {
        min-width: auto;
    }

    .step-item {
        flex-direction: column;
    }

    .schedule-item {
        flex-direction: column;
    }

    .schedule-time {
        min-width: auto;
    }

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

    .topics-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .btn {
        padding: 0.625rem 1.5rem;
        font-size: 0.9rem;
    }
}

/* Speakers Section */
.speakers-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.speakers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.speaker-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.speaker-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.speaker-photo {
    width: 150px;
    height: 150px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-color);
}

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

.speaker-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: bold;
}

.speaker-card h3 {
    margin: 0.5rem 0;
    color: var(--text-dark);
    font-size: 1.25rem;
}

.speaker-title {
    color: var(--primary-color);
    font-weight: 600;
    margin: 0.25rem 0;
    font-size: 0.95rem;
}

.speaker-affiliation {
    color: var(--text-light);
    margin: 0.25rem 0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .speakers-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1.5rem;
    }
    
    .speaker-photo {
        width: 120px;
        height: 120px;
    }
}

/* Form Error Styling */
.error-field {
    border-color: #dc3545 !important;
    border-width: 2px !important;
    background-color: #fff5f5 !important;
}

.field-error {
    display: block;
    color: #dc3545;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    font-weight: 500;
}

.form-group input.error-field,
.form-group textarea.error-field,
.form-group select.error-field {
    border-color: #dc3545;
    border-width: 2px;
    background-color: #fff5f5;
}

.form-group input.error-field:focus,
.form-group textarea.error-field:focus,
.form-group select.error-field:focus {
    outline: none;
    border-color: #dc3545;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}