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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid #e2e8f0;
    animation: slideDown 0.8s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-img {
    height: 36px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
}

.logo-accent {
    font-size: 1.5rem;
    font-weight: 700;
    color: #3182ce;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #3182ce;
}

.btn-primary {
    background: linear-gradient(135deg, #3182ce, #2c5aa0);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(49, 130, 206, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #3182ce;
    padding: 0.75rem 1.5rem;
    border: 2px solid #3182ce;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-secondary:hover {
    background: #3182ce;
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
}

.title-main {
    display: block;
    color: #2d3748;
}

.title-accent {
    display: block;
    background: linear-gradient(135deg, #3182ce, #2c5aa0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    color: #718096;
    margin-bottom: 2rem;
    line-height: 1.7;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 1s ease-out 0.6s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Visual */
.hero-visual {
    position: relative;
    height: 500px;
    animation: fadeInRight 1s ease-out 0.8s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-main-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

.hero-illustration {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.tech-icon {
    position: absolute;
    font-size: 3rem;
    background: white;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    animation: bounce 3s ease-in-out infinite;
}

.icon-1 {
    top: 18px;
    left: -12%;
    animation-delay: 0s;
}

.icon-2 {
    top: 20px;
    right: -9%;
    animation-delay: 0.5s;
}

.icon-3 {
    bottom: -50px;
    left: -3%;
    animation-delay: 1s;
}

.icon-4 {
    bottom: ;
    right: 0%;
    animation-delay: 1.5s;
}


@keyframes bounce {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Countdown */
.countdown {
    background: linear-gradient(135deg, #2d3748, #1a202c);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.countdown h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

.timer {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.timer-item {
    text-align: center;
}

.timer-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #3182ce;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.timer-label {
    display: block;
    font-size: 0.9rem;
    color: #a0aec0;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.timer-separator {
    font-size: 2rem;
    color: #4a5568;
}

.event-date {
    font-size: 1.2rem;
    color: #e2e8f0;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInUp 1s ease-out;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    color: #718096;
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: #f7fafc;
}

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

.benefit-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.benefit-icon {
    margin-bottom: 1.5rem;
}

.icon-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3182ce, #2c5aa0);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    font-size: 2rem;
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.benefit-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.benefit-card p {
    color: #718096;
    line-height: 1.7;
}

/* Prizes Section */
.prizes {
    padding: 6rem 0;
    background: white;
}

.prize-total {
    font-size: 1.5rem;
    font-weight: 600;
    color: #3182ce;
    margin-top: 0.5rem;
}

.prizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.prize-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    border: 3px solid #e2e8f0;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.first-place {
    border-color: #ffd700;
    background: linear-gradient(135deg, #fff9e6, #ffffff);
}

.second-place {
    border-color: #c0c0c0;
    background: linear-gradient(135deg, #f5f5f5, #ffffff);
}

.third-place {
    border-color: #cd7f32;
    background: linear-gradient(135deg, #fff2e6, #ffffff);
}

.prize-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.prize-medal {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
}

.prize-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.prize-amount {
    font-size: 2rem;
    font-weight: 700;
    color: #3182ce;
}

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

.special-prize {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    padding: 2rem;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: fadeInUp 1s ease-out;
}

.special-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

/* Program Section */
.program {
    padding: 6rem 0;
    background: #f7fafc;
}

.program-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.program-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, #3182ce, #2c5aa0);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
    animation: fadeInUp 1s ease-out;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
    margin-right: 2rem;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 2rem;
}

.timeline-marker {
    width: 20px;
    height: 20px;
    background: #3182ce;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: pulse 2s ease-in-out infinite;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    flex: 1;
    max-width: 350px;
}

.timeline-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: #718096;
    line-height: 1.6;
}

/* Organizers Section */
.organizers {
    padding: 6rem 0;
    background: white;
}

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

.organizer-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    border: 2px solid #e2e8f0;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.organizer-card:hover {
    transform: translateY(-5px);
    border-color: #3182ce;
    box-shadow: 0 10px 30px rgba(49, 130, 206, 0.2);
}

.organizer-logo {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.organizer-logo-img {
    max-height: 64px;
    width: auto;
    object-fit: contain;
    display: block;
    margin: 0 auto 1rem;
}

.organizer-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    line-height: 1.4;
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, #2d3748, #1a202c);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
}

.cta-content p {
    font-size: 1.2rem;
    color: #e2e8f0;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.cta .btn-primary {
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.event-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-top: 2rem;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.event-info-left {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: relative;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(79, 70, 229, 0.05));
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    overflow: hidden;
}

.event-info-left::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(79, 70, 229, 0.08));
    border-radius: 20px;
    transform: rotate(45deg);
    z-index: 1;
}

.event-info-left::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: -15px;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.06), rgba(37, 99, 235, 0.06));
    border-radius: 15px;
    transform: rotate(-30deg);
    z-index: 1;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: #e2e8f0;
    position: relative;
    z-index: 2;
}

.info-icon {
    font-size: 1.2rem;
}

.map-container {
    animation: fadeInUp 1s ease-out 0.8s both;
}

/* Gallery Section */
.gallery {
    padding: 6rem 0;
    background: #f7fafc;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.gallery-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* Lightbox */
.lightbox {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s ease;
}

.lightbox.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10000;
}

.lightbox-close:hover {
    color: #3182ce;
}

#lightbox-img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    border-radius: 8px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Footer */
.footer {
    background: #1a202c;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .timer {
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .timer-number {
        font-size: 2rem;
    }
    
    .timeline-item {
        flex-direction: column !important;
    }
    
    .timeline-item .timeline-content {
        text-align: center !important;
        margin: 1rem 0 !important;
        max-width: 100%;
    }
    
    .program-timeline::before {
        display: none;
    }
    
    .event-details {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .timer-number {
        font-size: 1.5rem;
    }
    
    .prizes-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .organizers-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

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