* {
    box-sizing: border-box;
}

body {
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', sans-serif;
    font-weight: 400;
}

body, p, li, a, input, textarea, button {
    font-family: 'Open Sans', sans-serif;
}

header {
    background-color: #16006D; 
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-right: 1.0;
}

nav ul li:last-child {
    margin-right: 0;
}

nav a {
    text-decoration: none;
    color: #f4f4f4;
    font-weight: 600;
}

main {
    background-color: #f4f4f4;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
}

#hero {
    background-image: url('Generative.png');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#hero h1 {
    color: #B576FF;
    font-size: 2.5rem;
    font-weight: 500;
    text-align: center;
}

h2 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #16006D; 
}

section {
    margin-bottom: 2rem;
}

section p {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
}

section ul {
    list-style-type: disc;
    padding: 0 2rem;
}

section ul li {
    list-style-type: disc;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

#register {
    background-color: #16006D;
    text-align: center;
    padding: 10rem;
}

#register h2 {
    color: #f4f4f4;
    padding-bottom: 1.5rem;
}

.register-btn {
    background-color: #040FD9; /* Pantone: 286 C */
    color: #fff;
    padding: 1rem 1.5rem;
    border-radius: 7px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s;
}

.register-btn:hover {
    background-color: #B576FF; /* Pantone: 528 C */
}

footer {
    background-color: #16006D; /* Pantone: 2706 C */
    padding: 1rem;
    text-align: center;
}

footer p {
    font-size: 0.875rem;
    font-weight: 400;
    color: #f4f4f4; /* Pantone: 528 C */
}

#challenges {
    margin-bottom: 2rem;
}

.challenges {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 1rem;
}

.challenge-flexbox {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.challenge-card {
    background-color: #F5F2F9;
    padding: 1rem;
    border-radius: 4px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    flex-basis: calc(33.33% - 1rem);
    margin-bottom: 1rem;
}

.challenge-card h3 {
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: #16006D; /* Pantone: 2745 C */
}

.challenge-card p {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    justify-content: stretch;
}

.date-location {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.date-location-flexbox {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.box {
    position: relative;
    background-color: #F5F2F9;
    padding: 1.5rem;
    border-radius: 4px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    flex-basis: calc(33.33% - 1rem);
    margin-bottom: 1rem;
}

.box p {
    position: absolute;
    top: 50%;
    left: 50%;
    font-size: 1.7rem;
    font-weight: 400;
    text-align: center;
    transform: translate(-50%, -50%);
    margin: 0; /* Remove default paragraph margins */
}

.map-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    margin-top: 1rem;
}

.map-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}