:root {
    --gradient-start: #4a69bd; /* blue */
    --gradient-end: #f39c12; /* orange */
    --text-color: #333;
    --bg-light: #f4f4f8;
}

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

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

header {
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    font-size: 2.8rem;
    margin: 0.5rem 0;
}

header h2 {
    font-weight: 400;
    font-size: 1.3rem;
}

section {
    max-width: 900px;
    margin: 2rem auto;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.6s ease;
}

section h3 {
    font-size: 1.8rem;
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

ul {
    list-style: disc;
    padding-left: 1.5rem;
}

a.btn {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.7rem 1.5rem;
    background: linear-gradient(to right, var(--gradient-start), var(--gradient-end));
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.2s ease;
}

a.btn:hover {
    transform: scale(1.05);
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #555;
    background: #eee;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}


header img {
    max-width: 400px;
    display: block;
    margin: 0 auto 1rem;
    filter: drop-shadow(0 0 25px rgba(139, 92, 246, 0.7));
}

header {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

header .logo-container img {
    max-width: 250px;
    filter: drop-shadow(0 0 25px rgba(139, 92, 246, 0.7));
}

header .text-container {
    max-width: 600px;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
    font-family: 'Orbitron', sans-serif;
}

header h2 {
    margin: 0.5rem 0 0;
    font-size: 1.5rem;
    font-family: 'Orbitron', sans-serif;
}

.no-link {
    text-decoration: none;
    color: white;
}


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

        header .text-container {
            text-align: center;
            max-width: 100%;
        }

        header .logo-container img {
            max-width: 300px;
            margin-bottom: 1rem;
        }
}

.keynote {
    display: flex;
    align-items: center;
    max-width: 900px;
    margin: 10px auto;
    border: 1px solid #ccc;
    padding: 10px;
    border-radius: 8px;
}

.keynote img {
    width: 200px;
    height: auto;
    border-radius: 8px;
    margin-right: 20px;
}

.keynote div{
    float: right;
    width: 75%;
}

.keynote div p{
    text-align: justify;
}

.keynote div h1{
    font-size: 20px;
    cursor: pointer;
    background-color: aqua;
    padding: 5px;
    border-radius: 5px;
}

.keynote div .talk{
    display: none;
}

#agenda {
    list-style-type: none;
}

#agenda li {
    border-radius: 10px;
    box-shadow: 0 3px 10px #f39c12;
    padding: 5px;
    margin: 10px;
    display: flex;
}

#agenda li div{
    float: left;
    margin: 10px;
}

#agenda li div:first-child{
    font-weight: bold; 
    min-width: 15%;
}