:root {
    --primary-color: #1a5f7a;
    --secondary-color: #57c5b6;
    --background-color: #f9f9f9;
    --text-color: #333;
    --light-gray: #e0e0e0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
}

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

header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    background-color: var(--secondary-color);
    padding: 10px 0;
}

nav ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: var(--primary-color);
}

h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-top: 40px;
}

.section {
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 20px;
    margin-bottom: 30px;
}

ul {
    padding-left: 20px;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.info-item svg {
    margin-right: 15px;
    flex-shrink: 0;
    color: var(--primary-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: var(--secondary-color);
    color: white;
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

.hero-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 20px;
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.image-grid img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
}

.image-caption {
    text-align: center;
    margin-top: 10px;
    font-style: italic;
    color: var(--text-color);
}

header .container {
    display: flex;
    justify-content: space-between;
    /* align-items: center; */
}

.header-title {
    font-size: 54pt;
    font-weight: bolder;
    margin: 0;
}

.partner-logo {
    top: 0;
    float: right;
    text-align: center;
    width: 40%;
}

ul.numbered {
    list-style-type: none;
}

ul.numbered li::before {
    content: counters(item, ".") ". ";
    counter-increment: item;
}

ul.numbered {
    counter-reset: item; 
}

.row {
    display: flex;
}

.col-7 {
    width: 60%;
    float: left;
}

.col-5 {
    width: 40%;
    float: right;
}

img.thumbnail {
    width: 100%;
}

.text-center {
    text-align: center;
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        align-items: center;
    }

    .header-text {
        text-align: center;
        margin-bottom: 20px;
    }

    .header-title {
        margin: 20px 0;
        font-size: 42pt;
        font-weight: bolder;
    }

    .partner-logo {
        width: 100%;
        justify-content: center;
    }

    nav ul {
        flex-direction: column;
    }

    .row {
        display: block;
    }

    .col-7 {
        width: 100%;
        float: none;
    }
    
    .col-5 {
        width: 100%;
        float: none;
    }

}

.program-section {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.tab-container {
    margin-bottom: 2rem;
}

.tabs {
    display: flex;
    gap: 1rem;
    border-bottom: 2px solid #e2e8f0;
    margin-bottom: 2rem;
}

.tab {
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    border: none;
    background: none;
    color: #64748b;
    font-weight: 600;
    transition: all 0.3s;
}

.tab.active {
    color: #0369a1;
    border-bottom: 2px solid #0369a1;
    margin-bottom: -2px;
}

.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    background: white;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.schedule-table th,
.schedule-table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid #e2e8f0;
}

.schedule-table th {
    background: #f8fafc;
    font-weight: 600;
    vertical-align: top;
}

.schedule-table tr:hover {
    background: #f1f5f9;
}

.time-column {
    white-space: nowrap;
    width: 120px;
}

.location-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: #e2e8f0;
    border-radius: 4px;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.speaker-badge {
    display: block;
    padding: 0.25rem 0.5rem;
    background: #eff2ea;
    border-radius: 4px;
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.session-header {
    background: #0394a1;
    color: white;
    padding: 0.1rem 1rem;
    margin: 2rem 0 1rem;
    border-radius: 4px;
}

.group-1-1 {
    background: #b3d3e4 !important;
}

.group-1-2 {
    background: #c0c7cb !important;
}

.group-2 {
    background: #ccddbf !important;
}

.group-3 {
    background: #eceed1 !important;
}

.group-4 {
    background: #fbc179 !important;
}

@media (max-width: 768px) {
    .schedule-table {
        display: block;
        overflow-x: auto;
    }
    
    .tabs {
        overflow-x: auto;
        white-space: nowrap;
    }
}

.yellow-time-box {
    display: flex;
    justify-content: center;
    align-items: center;
    div {
        background: yellow;
        padding: 0 8px;
        margin-top: 5px;
        border-radius: 4px;
    }
    
}