/* Global Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
}

/* Header & Logo */
header {
    background-color: #ffffff;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #e0e0e0;
}

.logo-container img {
    max-height: 125px;
    display: block;
}

.conference-title {
    font-size: 24px;
    font-weight: bold;
    color: #497896;
}

/* Navigation Bar */
nav {
    background-color: #497896;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav ul {
    list-style: none;
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav ul li a {
    display: block;
    color: #ffffff;
    text-decoration: none;
    padding: 15px 20px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

nav ul li a:hover, nav ul li a.active {
    background-color: #355870;
}

/* Main Layout */
.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: #497896;
    margin-bottom: 20px;
}

p {
    margin-bottom: 15px;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(73, 120, 150, 0.1), rgba(73, 120, 150, 0.2)), url('hero-bg.jpg') no-repeat center center/cover;
    background-color: #f4f7f9;
    padding: 80px 20px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 18px;
    max-width: 80px;
    margin: 0 auto 25px auto;
    color: #555555;
}

.btn {
    display: inline-block;
    background-color: #497896;
    color: #ffffff;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #355870;
}

/* Grid Components */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.card {
    background: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
}

/* Schedule Table */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 25px;
}

.schedule-table th, .schedule-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.schedule-table th {
    background-color: #497896;
    color: #ffffff;
}

.schedule-table tr:nth-child(even) {
    background-color: #f9fbfd;
}

.time-slot {
    font-weight: bold;
    color: #497896;
    width: 20%;
}

/* Footer */
footer {
    background-color: #333333;
    color: #ffffff;
    text-align: center;
    padding: 30px 20px;
    margin-top: 60px;
    font-size: 14px;
}