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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: #2c3e50;
    overflow-x: hidden;
    background: #ffffff;
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.menu-toggle {
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e7ff 100%);
    border: 2px solid #e0e7ff;
    font-size: 1.3rem;
    cursor: pointer;
    color: #2563eb;
    padding: 0.5rem 0.8rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.menu-toggle:hover {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* Main Content */
main {
    margin-top: 80px;
}

/* Welcome Section */
.welcome-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.welcome-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to top, rgba(255,255,255,0.95), transparent);
}

.welcome-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-30px, 30px); }
}

.welcome-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.welcome-text h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
}

.welcome-text p {
    font-size: 1.15rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    line-height: 1.8;
    font-weight: 400;
}

.cta-button {
    background: white;
    color: #667eea;
    border: none;
    padding: 1.1rem 2.5rem;
    font-size: 1.05rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    position: relative;
    z-index: 1;
}

.cta-button:hover {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.cta-button::before {
    content: '';
    margin-right: 0;
}

.cta-button:hover::before {
    transform: none;
}

.section-image {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
    transition: all 0.4s ease;
}

.section-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.18);
}

.about-image .section-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.events-image .section-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
}

.placeholder-image {
    background: rgba(255,255,255,0.1);
    border: 2px dashed rgba(255,255,255,0.3);
    padding: 4rem 2rem;
    text-align: center;
    border-radius: 10px;
    color: rgba(255,255,255,0.8);
}

/* About Section */
.about-section {
    padding: 5rem 0;
    background: linear-gradient(to bottom, #f8fafc 0%, #ffffff 100%);
}

.about-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3.5rem;
    color: #1e293b;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.mission, .why {
    margin-bottom: 2rem;
}

.mission h3, .why h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2563eb;
    font-weight: 700;
}

.about-image .placeholder-image {
    background: #e9ecef;
    border: 2px dashed #dee2e6;
    color: #6c757d;
}

/* Events Section */
.events-section {
    padding: 5rem 0;
    background: #ffffff;
}

.events-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3.5rem;
    color: #1e293b;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.events-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
}

.events-list h3, .participation h3 {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    color: #2563eb;
    font-weight: 700;
}

.events-list ul, .contribution-options ul {
    list-style: none;
    padding-left: 0;
}

.events-list li, .contribution-options li {
    padding: 1rem 1.5rem;
    border-left: 4px solid #2563eb;
    background: #f8fafc;
    margin-bottom: 0.8rem;
    border-radius: 12px;
    transition: all 0.3s ease;
    position: relative;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.events-list li:hover, .contribution-options li:hover {
    background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
    border-left-width: 6px;
    border-left-color: #7c3aed;
    transform: translateX(8px);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
}

.events-list li::after, .contribution-options li::after {
    content: '→';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #2563eb;
    font-weight: 700;
    opacity: 0;
    transition: all 0.3s ease;
}

.events-list li:hover::after, .contribution-options li:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(5px);
}

.contribution-options {
    margin-top: 1.5rem;
}

.contribution-options h4 {
    color: #475569;
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.1rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    padding: 3rem 0;
    position: relative;
    border-top: 4px solid #667eea;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.contact-info h3 {
    margin-bottom: 1.5rem;
    color: #f1f5f9;
    font-weight: 700;
    font-size: 1.3rem;
}

.contact-info p {
    margin-bottom: 0.5rem;
}

.email-large {
    font-size: 1.15rem !important;
    font-weight: 600;
    color: #60a5fa;
    margin-top: 1rem;
    padding: 0.5rem 0;
}

.back-to-top {
    position: absolute;
    right: 2rem;
    bottom: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    width: 55px;
    height: 55px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.3rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.back-to-top:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #667eea 100%);
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.5);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 10% auto;
    padding: 2.5rem;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideDown 0.3s ease;
}

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

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 1rem;
}

.close:hover {
    color: #333;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.mobile-nav a {
    color: #333;
    text-decoration: none;
    padding: 1rem;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.mobile-nav a:hover {
    background-color: #f8f9fa;
}

/* Contact Form */
#contactForm {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

#contactForm input, #contactForm textarea {
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

#contactForm textarea {
    min-height: 120px;
    resize: vertical;
}

#contactForm button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

#contactForm button:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Responsive Design */
@media (max-width: 768px) {
    .welcome-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .events-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .welcome-text h2 {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }
    
    .welcome-text h2 {
        font-size: 1.8rem;
    }
    
    .welcome-section {
        padding: 2rem 0;
    }
    
    .about-section,
    .events-section {
        padding: 3rem 0;
    }
}