/* Simple CSS for CHI Workshop Website */

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1 {
    font-size: 2.5em;
    margin-bottom: 0.5em;
    color: #1E2D41;
}

h2 {
    font-size: 2em;
    color: #1E2D41;
    margin-bottom: 1em;
    border-bottom: 2px solid #53C7E3;
    padding-bottom: 0.5em;
}

h3 {
    font-size: 1.3em;
    margin-bottom: 0.5em;
    color: #1E2D41;
}

h4 {
    font-size: 1.1em;
    margin-bottom: 0.5em;
    color: #1E2D41;
}

p {
    margin-bottom: 1em;
}

a {
    color: #53C7E3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Hero Section */
.hero {
    background: #1E2D41;
    color: white;
}

.hero-background {
    background: #1E2D41;
    padding: 1em 0;
}

/* Navigation */
.navigation {
    position: relative;
    z-index: 1000;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    position: absolute;
    top: 10px;
    right: 20px;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background: white;
    border-radius: 2px;
    transition: 0.3s;
}

.nav-menu {
    list-style: none;
    text-align: center;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    display: inline-block;
    margin: 0 1em;
}

.nav-menu a {
    color: white;
    font-weight: bold;
    padding: 0.5em 1em;
    display: block;
    transition: background 0.3s;
}

.nav-menu a:hover {
    background: #53C7E3;
    text-decoration: none;
    border-radius: 5px;
}

.banner-container {
    width: 100%;
    text-align: center;
    background: #1E2D41;
    padding: 1em 0;
}

.hero-banner {
    width: 100%;
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 10px;
}

.hero-content {
    background: #1E2D41;
    color: white;
    padding: 2em 0;
    text-align: center;
}

.hero h1 {
    color: white;
    margin-bottom: 0.5em;
    font-size: 2.2em;
}

.hero h2 {
    font-size: 1.2em;
    color: #53C7E3;
    border: none;
    margin-bottom: 1em;
    font-weight: normal;
}

.hero-subtitle {
    font-size: 1.1em;
    margin-bottom: 1.5em;
    font-weight: bold;
    color: #53C7E3;
}

.hero-details {
    font-size: 1em;
}

.hero-details span {
    margin: 0 1em;
    background: #53C7E3;
    color: white;
    padding: 0.5em 1em;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 0.5em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #1E2D41;
        flex-direction: column;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
        border-radius: 0 0 10px 10px;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        margin: 0;
        display: block;
    }
    
    .nav-menu a {
        padding: 1em;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .hero h1 {
        font-size: 1.8em;
    }
    
    .hero h2 {
        font-size: 1.1em;
    }
    
    .hero-details span {
        display: block;
        margin: 0.5em auto;
        max-width: 200px;
    }
}

/* Sections */
.section {
    padding: 3em 0;
}

.section-alt {
    background: #f8f9fa;
}

.content {
    text-align: justify;
}

/* Lists */
ul {
    margin-left: 2em;
    margin-bottom: 1em;
}

li {
    margin-bottom: 0.3em;
}

/* Participation Items */
.participation-grid {
    margin: 2em 0;
}

.participation-item {
    background: white;
    padding: 1.5em;
    margin-bottom: 1.5em;
    border: 1px solid #ddd;
    border-left: 4px solid #53C7E3;
}

.participation-item h4 {
    color: #1E2D41;
    margin-bottom: 0.5em;
}

/* Schedule */
.schedule-grid {
    margin: 2em 0;
}

.schedule-item {
    padding: 1em;
    margin-bottom: 1em;
    border: 1px solid #ddd;
    background: white;
}

.time {
    font-weight: bold;
    color: #53C7E3;
    font-size: 1.1em;
    margin-bottom: 0.5em;
}

.activity h4 {
    color: #1E2D41;
    margin-bottom: 0.3em;
}

.activity p {
    color: #666;
    margin-bottom: 0;
}

/* Organizers */
.organizers-grid {
    margin: 2em 0;
}

.organizer {
    background: white;
    padding: 2em;
    margin-bottom: 2em;
    border: 1px solid #ddd;
    text-align: center;
}

.organizer-photo {
    margin-bottom: 1em;
}

.organizer-photo img {
    border-radius: 50%;
    border: 3px solid #53C7E3;
}

.organizer h3 {
    margin-bottom: 0.3em;
    color: #1E2D41;
}

.affiliation {
    font-weight: bold;
    color: #53C7E3;
    margin-bottom: 1em;
}

.bio {
    color: #666;
    text-align: left;
    margin-bottom: 1em;
}

.contact {
    font-weight: bold;
    margin-bottom: 0;
}

/* Sponsors */
.sponsors-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2em 0;
}

.sponsor {
    text-align: center;
    background: white;
}

.sponsor-logo {
    width: 500px;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Footer */
.footer {
    background: #1E2D41;
    color: white;
    padding: 2em 0;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5em;
}

.footer a {
    color: #53C7E3;
}