:root {
    --primary-color: #1a237e;
    --secondary-color: #303f9f;
    --text-color: #333;
    --light-bg: #f5f6fa;
    --nav-bg: rgba(26, 35, 126, 0.95);
}

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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

nav {
    background-color: var(--nav-bg);
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.nav-item {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.hero {
    height: 100vh;
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 0;
}

.hero nav {
    background-color: transparent;
    position: absolute;
    top: 0;
    width: 100%;
    z-index: 2;
}

.hero-content {
    z-index: 1;
    color: white;
    text-align: center;
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-content h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}

.affiliation {
    font-style: italic;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.conference-link a {
    color: white;
    text-decoration: underline;
}

main {
    padding: 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.content-section {
    background: white;
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.content-section ul {
    list-style-type: none;
    padding-left: 1.5rem;
}

.content-section ul li {
    margin-bottom: 0.5rem;
    position: relative;
}

.content-section ul li:before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: -1rem;
}

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

.date-item {
    background: var(--light-bg);
    padding: 1rem;
    border-radius: 4px;
    text-align: center;
}

.date {
    font-weight: bold;
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.committee-section h3 {
    color: var(--secondary-color);
    margin: 1.5rem 0 1rem 0;
}

.email {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
    margin-top: 1rem;
}

.cmt-notice {
    background-color: #f8f9fa;
    padding: 1rem;
    border-left: 4px solid var(--primary-color);
    margin-top: 2rem;
    font-style: italic;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 1.5rem;
}

.image-item img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.image-item img:hover {
    transform: scale(1.03);
}

footer {
    background-color: var(--nav-bg);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-item {
        margin: 0.5rem 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
}