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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: #2d3748;
    overflow-x: hidden;
    background: #f7fafc;
}

.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 1px 3px rgba(0,0,0,0.08);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.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, #48bb78 0%, #38a169 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #48bb78;
    transition: all 0.3s ease;
}

.menu-toggle:hover {
    transform: scale(1.1);
    color: #38a169;
}

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

/* Welcome Section */
.welcome-section {
    padding: 5rem 0;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.welcome-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

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

.welcome-text h2 {
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.welcome-text p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    background: white;
    color: #48bb78;
    border: none;
    padding: 1.2rem 2.8rem;
    font-size: 1.05rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    background: #f7fafc;
    color: #38a169;
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.section-image {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    transition: all 0.4s ease;
}

.section-image:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
}

.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: white;
}

.about-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3.5rem;
    color: #2d3748;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.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: 1.2rem;
    color: #48bb78;
    font-weight: 700;
}

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

/* Events Section */
.events-section {
    padding: 5rem 0;
    background: #f7fafc;
}

.events-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3.5rem;
    color: #2d3748;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.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: #48bb78;
    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 #48bb78;
    background: white;
    margin-bottom: 0.8rem;
    border-radius: 0 12px 12px 0;
    transition: all 0.3s ease;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.events-list li:hover, .contribution-options li:hover {
    background: #f0fff4;
    border-left-color: #38a169;
    border-left-width: 6px;
    transform: translateX(8px);
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(72, 187, 120, 0.2);
}

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

.contribution-options h4 {
    color: #2d3748;
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);
    color: white;
    padding: 3rem 0;
    position: relative;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.contact-info h3 {
    margin-bottom: 1.2rem;
    color: white;
    font-weight: 700;
    font-size: 1.3rem;
}

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

.email-large {
    font-size: 1.2rem !important;
    font-weight: 600;
    color: #9ae6b4;
    margin-top: 1rem;
}

.back-to-top {
    position: absolute;
    right: 2rem;
    bottom: 2rem;
    background: linear-gradient(135deg, #48bb78 0%, #38a169 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 5px 15px rgba(0, 0, 0, 0.3);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(72, 187, 120, 0.4);
}

/* 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);
}

.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, #48bb78 0%, #38a169 100%);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(72, 187, 120, 0.3);
}

#contactForm button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(72, 187, 120, 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;
    }
}