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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: #ffffff;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
}

header {
    background: #1a365d;
    color: white;
    padding: 2rem 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-text h1 {
    font-size: 2.5rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

.endorsements {
    text-align: right;
    opacity: 0.9;
    font-size: 0.85rem;
}

.endorsements img {
    height: 60px;
    opacity: 0.9;
    filter: brightness(1.1);
}

.endorsements p {
    margin-bottom: 0.25rem;
    font-weight: 300;
}

nav {
    background: #2d3748;
    border-bottom: 1px solid #e2e8f0;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

nav ul {
    list-style: none;
    display: flex;
    margin: 0;
}

nav li {
    margin-right: 2rem;
}

nav a {
    color: #e2e8f0;
    text-decoration: none;
    padding: 1rem 0;
    display: block;
    font-weight: 400;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
}

nav a:hover {
    color: white;
    border-bottom-color: #3182ce;
}

nav a.active {
    color: white;
    border-bottom-color: #3182ce;
    background: rgba(49, 130, 206, 0.1);
}

main {
    padding: 0 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero section styles */
.hero {
    padding: 3rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.hero h2 {
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    color: #1a365d;
}

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

.hero p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #4a5568;
    line-height: 1.7;
}

.hero-visual {
    background: #f7fafc;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 3rem 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 250px;
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.hero-logo {
    max-width: 100%;
    max-height: 180px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.logo-caption {
    font-size: 0.9rem;
    color: #4a5568;
    font-style: italic;
    margin: 0;
    max-width: 280px;
    line-height: 1.4;
}

/* Page header styles */
.page-header {
    padding: 3rem 0 2rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: #1a365d;
}

/* Section styles */
.section {
    padding: 3rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.section:last-child {
    border-bottom: none;
}

.section h2 {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 2rem;
    color: #1a365d;
}

.section h3 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: #2d3748;
}

.section p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #4a5568;
    line-height: 1.7;
}

/* Mailing list styles */
.mailing-list {
    background: #edf2f7;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 2rem;
    margin: 2rem 0;
}

.mailing-list h3 {
    margin-bottom: 1rem;
}

.signup-form {
    display: flex;
    gap: 1rem;
    align-items: center;
    max-width: 500px;
    margin: 1.5rem 0;
}

.signup-form input[type="email"] {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    font-size: 1rem;
}

.signup-form button {
    padding: 0.75rem 1.5rem;
    background: #3182ce;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    white-space: nowrap;
}

.signup-form button:hover {
    background: #2c5aa0;
}

/* Grid layouts */
.schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.schedule-item {
    background: #f7fafc;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 1.5rem;
}

.schedule-item h4 {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #2d3748;
}

.topics-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.topic-item {
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 1.5rem;
    background: white;
}

.topic-item h4 {
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: #1a365d;
}

.topic-item p {
    color: #4a5568;
    font-size: 0.95rem;
}

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

.format-item {
    text-align: center;
    padding: 1.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    background: #f7fafc;
}

.format-number {
    font-size: 2rem;
    font-weight: 300;
    color: #3182ce;
    margin-bottom: 0.5rem;
}

/* Organizers styles */
.organizers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.organizer {
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 1.5rem;
    background: white;
}

.organizer h4 {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: #1a365d;
}

.organizer p {
    color: #4a5568;
    font-size: 0.95rem;
}

.former-organizers ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.former-organizers li {
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    font-size: 0.95rem;
}

.former-organizers a:hover {
    text-decoration: underline !important;
}

/* Announcements styles */
.announcement-list {
    list-style: none;
    margin: 2rem 0;
}

.announcement-item {
    background: #f8f9fa;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: box-shadow 0.2s ease;
}

.announcement-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.announcement-item strong {
    color: #1a365d;
    font-size: 1.1rem;
}

.announcement-meta {
    color: #6b7280;
    font-size: 0.95rem;
    margin-top: 0.5rem;
}

.submission-info {
    background: #edf2f7;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 2rem;
    margin: 2rem 0;
}

/* Contact & Support styles */
.acknowledgment-box {
    background: #edf2f7;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 2rem;
    margin: 2rem 0;
    text-align: center;
}

.credit-box {
    background: #f8f9fa;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 2rem;
    margin: 2rem 0;
}

.support-list {
    list-style: none;
    margin: 1.5rem 0;
}

.support-list li {
    margin-bottom: 1rem;
    padding-left: 1rem;
    position: relative;
}

.support-list li::before {
    content: "•";
    color: #3182ce;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.research-group {
    font-weight: 500;
    color: #2d3748;
}

.university {
    font-weight: 500;
    color: #2d3748;
}

.logos-section {
    padding: 3rem 0;
    background: #f8f9fa;
    border-radius: 4px;
    margin: 2rem 0;
}

.logos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    align-items: center;
    justify-items: center;
    margin: 2rem 0;
}

.logo-item {
    text-align: center;
    padding: 1rem;
}

.logo-item img {
    max-width: 200px;
    max-height: 100px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.logo-caption {
    font-size: 0.9rem;
    color: #6b7280;
    margin-top: 0.5rem;
}

/* Instructions styles */
.instruction-box {
    background: #f7fafc;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
    padding: 2rem;
    margin: 2rem 0;
}

.instruction-box h3 {
    color: #1a365d;
    margin-bottom: 1rem;
}

.warning-box {
    background: #fffbeb;
    border: 1px solid #f6e05e;
    border-left: 4px solid #f59e0b;
    border-radius: 4px;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.warning-box strong {
    color: #92400e;
}

/* Link styles */
.email-link {
    color: #3182ce;
    font-weight: 500;
    text-decoration: none;
}

.email-link:hover {
    text-decoration: underline;
}

.link {
    color: #3182ce;
    text-decoration: none;
    font-weight: 500;
}

.link:hover {
    text-decoration: underline;
}

.website-link {
    color: #3182ce;
    text-decoration: none;
    font-weight: 500;
    margin-left: 0.5rem;
}

.website-link:hover {
    text-decoration: underline;
}

.zoom-link {
    color: #3182ce;
    text-decoration: none;
    font-weight: 500;
}

.zoom-link:hover {
    text-decoration: underline;
}

/* Contact and footer */
.contact {
    background: #1a365d;
    color: white;
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.contact-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact h2 {
    color: white;
    margin-bottom: 1rem;
}

.contact-email {
    font-size: 1.1rem;
    color: #90cdf4;
    margin: 1rem 0;
}

footer {
    background: #2d3748;
    color: #a0aec0;
    padding: 2rem;
    text-align: center;
    font-size: 0.9rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

/* Utility styles */
.highlight {
    background: #bee3f8;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-weight: 500;
}

.note {
    background: #fffbeb;
    border: 1px solid #f6e05e;
    border-radius: 4px;
    padding: 1rem;
    margin: 1rem 0;
    font-size: 0.95rem;
}

.professional-note {
    background: #f8f9fa;
    border-left: 4px solid #3182ce;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    color: #4a5568;
}

/* Responsive design */
@media (max-width: 768px) {
    .header-content, .nav-content, main {
        padding: 0 1rem;
    }

    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .endorsements {
        text-align: center;
    }

    .endorsements img {
        height: 50px;
    }

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

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

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-visual {
        padding: 2rem 1rem;
        min-height: 200px;
    }
    
    .hero-logo {
        max-height: 140px;
    }
    
    .logo-caption {
        font-size: 0.85rem;
    }

    nav ul {
        flex-direction: column;
    }

    nav li {
        margin-right: 0;
        border-bottom: 1px solid #4a5568;
    }

    nav li:last-child {
        border-bottom: none;
    }

    .section {
        padding: 2rem 0;
    }

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

    .signup-form {
        flex-direction: column;
        align-items: stretch;
    }

    .former-organizers ul {
        grid-template-columns: 1fr;
    }

    .logos-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .logos-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}