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

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

/* Header */
header {
    position: fixed;
    width: 100%;
    top: 0;
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    z-index: 1000;
}

nav {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.main-logo {
    height: 55px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.3s;
}

.nav-menu a:hover {
    color: #e67e22;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 6rem 3rem;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
}

.hero-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 6rem;
    align-items: center;
}

.hero-text {
    color: #fff;
}

.badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255,255,255,0.2);
}

.hero-text h1 {
    font-size: 2.8rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.hero-text h1 .highlight {
    font-size: 3.5rem;
    font-weight: 700;
    display: block;
    margin-top: 0.5rem;
    color: #ffd700;
}

.hero-text h2 {
    font-size: 1.35rem;
    font-weight: 400;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.6;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.info-card {
    background: rgba(255,255,255,0.95);
    padding: 1.2rem;
    border-radius: 10px;
    color: #333;
}

.info-card .label {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 0.3rem;
}

.info-card .value {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e3c72;
}

.btn-group {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: #e67e22;
    color: #fff;
}

.btn-primary:hover {
    background: #d35400;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(230, 126, 34, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #1e3c72;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.circle-img {
    width: 420px;
    height: 420px;
    border-radius: 50%;
    object-fit: cover;
    border: 8px solid rgba(255,255,255,0.3);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

/* Organizer Section */
.organizer {
    padding: 4rem 3rem;
    background: #f8f9fa;
    text-align: center;
}

.organizer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.organizer h3 {
    font-size: 1.8rem;
    color: #1e3c72;
    margin-bottom: 1rem;
}

.organizer p {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto;
}

/* Poster Section */
.poster-section {
    padding: 5rem 3rem;
    background: #fff;
    text-align: center;
}

.poster-section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e3c72;
    font-weight: 600;
}

.poster-img {
    max-width: 900px;
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

/* About Section */
.about {
    padding: 5rem 3rem;
    background: #f8f9fa;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
}

.about h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 2rem;
    color: #1e3c72;
    font-weight: 600;
}

.about-text {
    font-size: 1.1rem;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto 4rem;
    color: #555;
    line-height: 1.8;
}

.objectives h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #e67e22;
    font-weight: 600;
}

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

.obj-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid #e0e0e0;
}

.obj-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-color: #e67e22;
}

.obj-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.obj-card p {
    color: #555;
    line-height: 1.7;
    font-size: 1rem;
}

/* Themes Section */
.themes {
    padding: 5rem 3rem;
    background: #fff;
}

.themes-content {
    max-width: 1200px;
    margin: 0 auto;
}

.themes h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e3c72;
    font-weight: 600;
}

.themes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.theme-card {
    background: #f8f9fa;
    padding: 2.5rem;
    border-radius: 12px;
    border-left: 5px solid #e67e22;
    transition: all 0.3s;
}

.theme-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    background: #fff;
}

.theme-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #e67e22;
    margin-bottom: 1rem;
}

.theme-card h4 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: #1e3c72;
    font-weight: 600;
}

.theme-card p {
    color: #666;
    line-height: 1.7;
    font-size: 1rem;
}

/* Dates Section */
.dates {
    padding: 5rem 3rem;
    background: #f8f9fa;
}

.dates-content {
    max-width: 1000px;
    margin: 0 auto;
}

.dates h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: #1e3c72;
    font-weight: 600;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.timeline-item {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 2rem;
    padding: 1.8rem;
    background: #fff;
    border-radius: 10px;
    border-left: 4px solid #e67e22;
    align-items: center;
    transition: all 0.3s;
}

.timeline-item:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.timeline-item.highlight {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: #fff;
    border-left: 4px solid #ffd700;
}

.timeline-date {
    font-weight: 600;
    font-size: 1.15rem;
    color: #e67e22;
}

.timeline-item.highlight .timeline-date {
    color: #ffd700;
}

.timeline-event {
    font-size: 1.1rem;
}

/* Footer */
footer {
    background: #f8f9fa;
    color: #333;
    border-top: 1px solid #e9ecef;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4rem;
    padding: 4rem 0;
    align-items: start;
}

.footer-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1e3c72;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e67e22;
    padding-bottom: 0.5rem;
    display: inline-block;
}

.footer-section h4 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #e67e22;
    margin-bottom: 0.5rem;
}

.footer-section p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    line-height: 1.6;
    color: #555;
}

.footer-section a {
    color: #1e3c72;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: #e67e22;
    text-decoration: underline;
}

.footer-section iframe {
    border-radius: 8px;
    margin-top: 0.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.footer-bottom {
    border-top: 1px solid #e9ecef;
    background: #fff;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    margin: 0;
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .footer-section iframe {
        width: 100%;
        max-width: 350px;
        height: 200px;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .btn-group {
        justify-content: center;
    }
    
    .circle-img {
        width: 350px;
        height: 350px;
    }
}

@media (max-width: 768px) {
    nav {
        padding: 1rem 1.5rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: right 0.3s ease;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .nav-menu a {
        font-size: 1.2rem;
        padding: 1rem;
    }
    
    .hero {
        padding: 4rem 1.5rem;
    }
    
    .hero-text h1 {
        font-size: 2rem;
    }
    
    .hero-text h1 .highlight {
        font-size: 2.5rem;
    }
    
    .circle-img {
        width: 280px;
        height: 280px;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .poster-section,
    .about,
    .themes,
    .dates {
        padding: 3rem 1.5rem;
    }
}