:root {
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --hero-bg: #1a252f;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

h1, h2, h3 {
    font-family: 'Playfair Display', serif;
}

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

/* Header & Navigation */
header {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 125px;
    width: auto;
    object-fit: contain;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.lang-switch {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.lang-switch:hover {
    background: var(--secondary-color);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: auto;
    background: var(--hero-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding: 6rem 0;
    margin-top: 80px;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: var(--white);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    opacity: 0.95;
    color: var(--white);
}

.hero .cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    margin-top: 2rem;
    font-weight: 600;
}

.cta-button:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

/* Sections */
section {
    padding: 5rem 0;
}

section:nth-child(even) {
    background-color: var(--light-bg);
}

.about-section, .schedule-section, .partners-section, .syllabus-section, .sponsors-section {
    text-align: center;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

/* About Section */
.about-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.about-content {
    text-align: left;
}

.about-content p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-content a {
    color: var(--secondary-color);
    text-decoration: none;
}

.about-content a:hover {
    text-decoration: underline;
}

.about-image {
    text-align: center;
}

.about-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

/* Schedule Section */
.schedule-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.schedule-two-column {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    margin-top: 40px;
}

.schedule-left-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.schedule-info-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-left: 4px solid #28a745;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.schedule-info-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.schedule-info-card h3 {
    color: #28a745;
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.schedule-info-card p {
    color: #495057;
    margin: 0;
    font-size: 1rem;
    line-height: 1.5;
}

.schedule-right-column {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.schedule-content {
    max-width: 100%;
}

.schedule-category {
    margin-bottom: 30px;
}

.schedule-category:last-child {
    margin-bottom: 0;
}

.schedule-category h3 {
    color: #28a745;
    margin-bottom: 20px;
    font-size: 1.3rem;
    font-weight: 600;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 10px;
}

.schedule-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.schedule-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #28a745;
    transition: background-color 0.3s ease;
}

.schedule-item:hover {
    background: #e9ecef;
}

.schedule-item .time {
    font-weight: 600;
    color: #28a745;
    min-width: 60px;
    margin-right: 20px;
    font-size: 1.1rem;
}

.schedule-item .event {
    color: #495057;
    flex: 1;
    font-size: 1rem;
    line-height: 1.4;
}

/* Partners Section */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.partner-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-card:hover {
    transform: translateY(-5px);
}

.partner-logo {
    text-align: center;
}

.partner-logo img {
    max-width: 100%;
    max-height: 120px;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: var(--transition);
}

.partner-logo a {
    display: block;
    text-decoration: none;
}

.partner-logo a:hover img {
    transform: scale(1.05);
}

/* Syllabus Section */
.syllabus-section {
    padding: 80px 0;
    background: var(--white);
}

.syllabus-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.syllabus-content p {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.syllabus-button {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 15px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid var(--primary-color);
}

.syllabus-button:hover {
    background: transparent;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Sponsors Section */
.sponsors-content {
    max-width: 600px;
    margin: 0 auto;
}

.sponsors-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.sponsors-contact {
    margin-top: 2rem;
}

.sponsors-contact p {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--secondary-color);
}

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

.sponsors-contact a:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p {
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1rem;
    text-align: center;
}

.footer-bottom p {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h2 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .logo img {
        height: 40px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .about-content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .schedule-two-column {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .schedule-left-column {
        order: 2;
    }
    
    .schedule-right-column {
        order: 1;
    }
    
    .schedule-info-card {
        padding: 20px;
    }
    
    .schedule-right-column {
        padding: 25px;
    }
    
    .schedule-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .schedule-item .time {
        margin-right: 0;
        margin-bottom: 5px;
    }

    .main-nav {
        padding: 1rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 2rem;
    }

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

    section {
        padding: 3rem 0;
    }

    h2 {
        font-size: 2rem;
    }

    .schedule-items {
        padding: 1rem;
    }

    .partner-card {
        padding: 1.5rem;
    }
}