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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* Header */
header {
    background-color: #1a5276;
    color: white;
    text-align: center;
    padding: 1rem 0;
}

.logo-container {
    margin-bottom: 1rem;
}

.logo {
    max-height: 120px;
    max-width: 100%;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

/* Navigation */
nav {
    background-color: #2874a6;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav ul {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    padding: 0.5rem 0;
}

nav li {
    margin: 0 1rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

nav a:hover {
    color: #f0f0f0;
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: white;
    transition: width 0.3s;
}

nav a:hover::after {
    width: 100%;
}

/* Main content */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.section {
    background-color: white;
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #1a5276;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #2874a6;
}

h3 {
    color: #2874a6;
    margin: 1.5rem 0 0.5rem;
}

p, ul, ol {
    margin-bottom: 1rem;
}

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

/* Dates list */
.dates-list, .prizes-list {
    list-style: none;
    padding: 0;
}

.dates-list li, .prizes-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

/* Tracks */
.track {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px dashed #ccc;
}

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

/* Table styles */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.schedule-table th, .schedule-table td {
    padding: 0.75rem;
    text-align: left;
    border: 1px solid #ddd;
}

.schedule-table th {
    background-color: #2874a6;
    color: white;
}

.schedule-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

/* Organizers and speakers */
.organizer, .speaker {
    margin-bottom: 1rem;
}

/* Links */
a {
    color: #2874a6;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: #1a5276;
    color: white;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}

/* Responsive design */
@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }
    
    nav li {
        margin: 0.3rem 0;
    }
    
    header h1 {
        font-size: 2rem;
    }
}