:root {
    --primary-color: #003366; /* Deep Blue */
    --accent-color: #FFD700; /* Gold */
    --text-color: #ffffff;
    --bg-color: #0a0a1a;
    --card-bg: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    background-image: radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 3px),
    radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 2px),
    radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 3px);
    background-size: 550px 550px, 350px 350px, 250px 250px;
    background-position: 0 0, 40px 60px, 130px 270px;
}

header {
    background-color: rgba(0, 0, 0, 0.8);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: contain;
}

.site-title {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Hamburger Menu */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all 0.3s ease;
}

/* Mobile Menu Animation State */
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--accent-color);
    transition: width 0.3s;
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    color: var(--accent-color);
}

.hero {
    text-align: center;
    padding: 5rem 2rem;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5));
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: 1px solid var(--primary-color);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background-color: var(--accent-color);
    transition: width 0.3s ease;
    z-index: -1;
}

.btn:hover::before {
    width: 100%;
}

.btn:hover {
    background-color: transparent;
    border-color: var(--accent-color);
    color: #000; /* Text color on gold background */
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.3);
}

.section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    border-bottom: 2px solid var(--accent-color);
    display: inline-block;
    padding-bottom: 0.5rem;
}

.about-short {
    text-align: center;
    font-size: 1.1rem;
}

.highlight-banner {
    background: rgba(255, 255, 255, 0.05);
    padding: 3rem;
    border-radius: 10px;
    text-align: center;
    margin: 2rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.partners {
    text-align: center;
}

.partner-list {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.partner-item {
    background: white;
    color: black;
    padding: 1rem;
    border-radius: 5px;
    min-width: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* About Page */
.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-color);
}

.card h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
}

/* Activities Page */
.speaker-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.speaker-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background-color: #ccc;
    object-fit: cover;
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delay for grid items */
.grid-4 .card:nth-child(1) { transition-delay: 0.1s; }
.grid-4 .card:nth-child(2) { transition-delay: 0.2s; }
.grid-4 .card:nth-child(3) { transition-delay: 0.3s; }
.grid-4 .card:nth-child(4) { transition-delay: 0.4s; }

/* Gallery Page */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.gallery-item {
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.gallery-item:hover {
    transform: translateY(-5px);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.caption {
    padding: 1rem;
}

.caption h3 {
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.caption p {
    font-size: 0.9rem;
    color: #ddd;
}

/* Contact Page */
.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border-radius: 5px;
    border: none;
    background: rgba(255, 255, 255, 0.9);
}

footer {
    background-color: rgba(0, 0, 0, 0.9);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    font-size: 0.9rem;
    color: #aaa;
}

@media (max-width: 768px) {
    header {
        /* flex-direction: column;  Remove this to keep row layout */
        gap: 1rem;
        justify-content: space-between;
    }

    .hamburger {
        display: flex;
    }
    
    nav {
        position: fixed;
        top: 0;
        right: -100%; /* Hide off-screen */
        width: 70%;
        height: 100vh;
        background-color: rgba(0, 0, 0, 0.95);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: right 0.4s ease-in-out;
        z-index: 1000;
        box-shadow: -5px 0 15px rgba(0,0,0,0.5);
    }

    nav.nav-active {
        right: 0;
    }
    
    nav ul {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

    nav a {
        font-size: 1.5rem;
    }
    
    .speaker-card {
        flex-direction: column;
        text-align: center;
    }
}