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

body {
    background: #f5f5f5;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

/* Top Section */
.top-section {
    width: 100%;
    max-height: 400px;
    overflow: hidden;
}

.big-sdg-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Grid Container - Exactly 6 items per line (18 items = 3 rows) */
.grid-container {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Grid Items */
.grid-item {
    position: relative;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.grid-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.grid-item a {
    text-decoration: none;
    display: block;
}

.grid-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* Count Badge */
.goal-number {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    font-family: monospace;
    backdrop-filter: blur(4px);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background-color: white;
    margin: 5% auto;
    width: 90%;
    max-width: 500px;
    border-radius: 20px;
    animation: modalIn 0.2s ease;
    overflow: hidden;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.close {
    position: absolute;
    right: 16px;
    top: 12px;
    font-size: 28px;
    font-weight: 300;
    color: white;
    cursor: pointer;
    z-index: 10;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.5);
    border-radius: 50%;
    transition: background 0.2s;
}

.close:hover {
    background: rgba(0,0,0,0.7);
}

.modal-content img {
    width: 100%;
    height: auto;
    display: block;
}

.modal-content h2 {
    padding: 20px 24px 8px;
    font-size: 1.4rem;
    color: #1a1a1a;
}

.modal-content p {
    padding: 0 24px 24px;
    color: #666;
    line-height: 1.5;
}

/* Responsive Breakpoints - Maintain 6 columns as long as possible */
@media (max-width: 1200px) {
    .grid-container {
        grid-template-columns: repeat(5, 1fr);
        gap: 1.2rem;
    }
}

@media (max-width: 992px) {
    .grid-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
        padding: 1rem;
    }
    
    .goal-number {
        font-size: 10px;
        padding: 3px 6px;
        top: 5px;
        right: 5px;
    }
}

@media (max-width: 480px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
        padding: 0.8rem;
    }
    
    .top-section {
        max-height: 200px;
    }
}

/* Landscape mode on mobile */
@media (orientation: landscape) and (max-width: 900px) {
    .grid-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.8rem;
        padding: 1rem;
    }
}

/* Touch devices */
@media (hover: none) {
    .grid-item:hover {
        transform: none;
    }
    
    .grid-item:active {
        transform: scale(0.97);
    }
}