/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Variables */
:root {
    --primary-color: #DAA520;
    --secondary-color: #333333;
    --accent-color: #DAA520;
    --text-color: #333;
    --light-bg: #F8F9FA;
    --white: #FFFFFF;
    --gray-100: #F3F4F6;
    --gray-300: #D1D5DB;
    --gray-600: #6B7280;
    --gray-800: #1F2937;
    --success-color: #DAA520;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --border-radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-gold: 0 3px 6px rgba(218, 165, 32, 0.3);
    --transition: all 0.3s ease;
}

/* Utility class to hide and show elements */
.hidden {
    visibility: hidden;
    opacity: 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: #d4a520;
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-gold);
    transition: transform 0.3s ease, background-color 0.3s ease;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: scale(1.1);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 16px 0;
    box-shadow: var(--shadow-gold);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    transform: translateY(-1px);
}

.nav-logo img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    color: var(--white);
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

.hero-slide.active {
    opacity: 1;
}

.hero-slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    /* Dark overlay for text readability */
    z-index: 1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 2;
}

.hero-content {
    text-align: center;
    margin-bottom: 64px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--primary-color);
}

.hero-description {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1.1rem;
    color: var(--white);
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.about-card {
    background-color: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
    text-align: center;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-gold);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.about-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 16px;
}

.about-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* Timeline Section */
.timeline {
    padding: 80px 0;
    background-color: var(--white);
}

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

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background-color: var(--secondary-color);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 48px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 10px;
    height: 10px;
    background-color: var(--primary-color);
    border-radius: 50%;
    border: 1px solid var(--white);
    box-shadow: var(--shadow-gold);
    z-index: 2;
}

.timeline-date {
    flex: 1;
    text-align: center;
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 1.1rem;
}

.timeline-content {
    flex: 1;
    background-color: var(--light-bg);
    padding: 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
    margin: 0 24px;
}

.timeline-content h3 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 1.3rem;
}

.timeline-content p {
    color: var(--gray-600);
    margin-left: 10px;
}

/* Participation Section */
.participate {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.participation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

.participation-step {
    background-color: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
    text-align: center;
    transition: var(--transition);
}

.participation-step:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-gold);
}

.step-number {
    width: 64px;
    height: 64px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 16px;
}

.participation-step h3 {
    color: var(--text-color);
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.participation-step p {
    color: var(--gray-600);
    line-height: 1.7;
}

.participation-cta {
    text-align: center;
}

/* Guidelines Section */
.guidelines {
    padding: 80px 0;
    background-color: var(--white);
}

.guidelines-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
}

.guideline-card {
    background-color: var(--light-bg);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
    transition: var(--transition);
}

.guideline-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-gold);
}

.guideline-card h3 {
    color: var(--primary-color);
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.guideline-card ul {
    list-style: none;
    padding: 0;
}

.guideline-card li {
    padding: 8px 0;
    border-bottom: 1px solid var(--gray-300);
    color: var(--gray-600);
    position: relative;
    padding-left: 24px;
}

.guideline-card li:last-child {
    border-bottom: none;
}

.guideline-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Countries Section */
.countries {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.countries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 32px;
}

.country-card,
.language-card {
    background-color: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
}

.country-card h3,
.language-card h3 {
    color: var(--text-color);
    margin-bottom: 24px;
    font-size: 1.3rem;
    text-align: center;
}

.country-list,
.language-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.country-tag,
.language-tag {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.language-tag {
    background-color: var(--primary-color);
}

.country-tag:hover,
.language-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
}

/* Prizes Section */
.prizes {
    padding: 80px 0;
    background-color: var(--white);
}

.prizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.prize-card {
    background-color: var(--light-bg);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.prize-card.featured {
    background: linear-gradient(135deg, var(--primary-color), #f4d03f);
    color: var(--white);
    transform: scale(1.05);
}

.prize-card.featured::before {
    content: '👑';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
}

.prize-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-gold);
}

.prize-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.prize-position {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
}

.prize-card.featured .prize-position {
    color: var(--white);
}

.prize-card h3 {
    color: var(--text-color);
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.prize-card.featured h3 {
    color: var(--white);
}

.prize-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.prize-card.featured .prize-amount {
    color: var(--white);
}

.prize-card p {
    color: var(--gray-600);
}

.prize-card.featured p {
    color: rgba(255, 255, 255, 0.9);
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 48px;
}

.contact-info {
    margin-top: 24px;
}

.contact-info h3,
.contact-form h3 {
    color: var(--primary-color);
    margin-bottom: 24px;
    font-size: 1.5rem;
}

.contact-item {
    margin-bottom: 16px;
    padding: 16px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
}

.contact-item strong {
    color: var(--text-color);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--text-color);
}

.social-links {
    margin-top: 32px;
}

.social-links h4 {
    color: var(--text-color);
    margin-bottom: 16px;
}

.social-icons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.social-icon {
    display: inline-block;
    padding: 8px 16px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
}

.social-icon:hover {
    background-color: #d4a520;
    color: var(--white);
    transform: translateY(-2px);
}

.contact-form {
    background-color: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-gold);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(238, 183, 37, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background-color: var(--gray-800);
    color: var(--white);
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 32px;
}

.footer-section h3,
.footer-section h4 {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.footer-section p {
    color: var(--gray-300);
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a,
.hero-description a {
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition);
}

.hero-description a {
    color: var(--white);
}

.footer-section a:hover,
.hero-description a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--gray-600);
    color: var(--gray-300);
}

/* Responsive Design */
@media (min-width: 1024px) {
    .timeline-item:nth-child(odd) {
        flex-direction: row-reverse;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-gold);
        padding: 32px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: 32px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .timeline-container::before {
        left: 20px;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 48px;
    }

    .timeline-item::before {
        left: 20px;
    }

    .timeline-date {
        text-align: left;
        margin-bottom: 16px;
    }

    .timeline-content {
        margin: 0;
    }

    .countries-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .prizes-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .prize-card.featured {
        transform: none;
    }

    .prize-card.featured:hover {
        transform: translateY(-8px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 24px;
        font-size: 0.9rem;
    }

    .about-grid,
    .guidelines-grid {
        grid-template-columns: 1fr;
    }

    .participation-grid {
        grid-template-columns: 1fr;
    }

    .prizes-grid {
        grid-template-columns: 1fr;
    }

    .back-to-top {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes rotateTransition {
    0% {
        transform: rotate(0deg) scale(1.1);
    }

    100% {
        transform: rotate(360deg) scale(1.1);
    }
}

.back-to-top:hover {
    animation: rotateTransition 0.3s ease-in-out;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.hero-stats {
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #FFD700;
        --secondary-color: #000;
        --accent-color: #0000FF;
        --text-color: #000;
    }
}