/**
 * Masonry Grid Component
 *
 * A flexible grid system for portfolio/gallery layouts inspired by KJS Lofts.
 * Supports multiple column configurations, gap variations, and responsive behavior.
 *
 * Usage:
 * <div class="masonry-grid cols-4 gap-none">
 *   <div class="masonry-grid__item">
 *     <img src="..." alt="..." class="masonry-grid__image">
 *     <div class="masonry-grid__overlay">
 *       <span class="masonry-grid__title">Project Name</span>
 *     </div>
 *   </div>
 * </div>
 */

/* ==========================================================================
   Base Grid Wrapper
   ========================================================================== */

.masonry-grid {
    display: grid;
    width: 100%;
    margin: 0 auto;
}

/* Full-width variant - breaks out of container */
.masonry-grid.full-width {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
}

/* ==========================================================================
   Column Variations
   ========================================================================== */

/* 4-column grid (default) */
.masonry-grid.cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* 3-column grid */
.masonry-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* 2-column grid */
.masonry-grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

/* ==========================================================================
   Gap Variations
   ========================================================================== */

/* No gaps - ideal for portfolio layouts */
.masonry-grid.gap-none {
    gap: 0;
}

/* Small gaps */
.masonry-grid.gap-sm {
    gap: 10px;
}

/* Medium gaps */
.masonry-grid.gap-md {
    gap: 20px;
}

/* ==========================================================================
   Grid Items
   ========================================================================== */

.masonry-grid__item {
    position: relative;
    overflow: hidden;
    background-color: #f5f5f5;
    cursor: pointer;
}

/* Maintain aspect ratio for items */
.masonry-grid__item::before {
    content: '';
    display: block;
    padding-bottom: 100%; /* Square by default */
}

/* ==========================================================================
   Images
   ========================================================================== */

.masonry-grid__image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

/* Hover effect - subtle zoom */
.masonry-grid__item:hover .masonry-grid__image {
    transform: scale(1.05);
}

/* ==========================================================================
   Overlay (Optional)
   ========================================================================== */

.masonry-grid__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    pointer-events: none;
}

.masonry-grid__item:hover .masonry-grid__overlay {
    opacity: 1;
}

/* Overlay content */
.masonry-grid__title {
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    padding: 0 1rem;
    transform: translateY(10px);
    transition: transform 0.3s ease;
}

.masonry-grid__item:hover .masonry-grid__title {
    transform: translateY(0);
}

.masonry-grid__icon {
    color: #ffffff;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    transform: translateY(10px);
    transition: transform 0.3s ease 0.05s;
}

.masonry-grid__item:hover .masonry-grid__icon {
    transform: translateY(0);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet: 768px - 959px (max 2 columns) */
@media screen and (max-width: 959px) {
    .masonry-grid.cols-4,
    .masonry-grid.cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .masonry-grid.cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Adjust gaps for tablet */
    .masonry-grid.gap-md {
        gap: 15px;
    }
}

/* Mobile: < 768px (single column) */
@media screen and (max-width: 767px) {
    .masonry-grid.cols-4,
    .masonry-grid.cols-3,
    .masonry-grid.cols-2 {
        grid-template-columns: 1fr;
    }

    /* Adjust gaps for mobile */
    .masonry-grid.gap-sm {
        gap: 8px;
    }

    .masonry-grid.gap-md {
        gap: 12px;
    }

    /* Smaller overlay text on mobile */
    .masonry-grid__title {
        font-size: 1rem;
    }

    .masonry-grid__icon {
        font-size: 1.5rem;
    }

    /* Full-width adjustments for mobile */
    .masonry-grid.full-width {
        width: 100%;
        margin-left: 0;
    }
}

/* Large Desktop: > 1200px */
@media screen and (min-width: 1200px) {
    .masonry-grid__title {
        font-size: 1.5rem;
    }

    .masonry-grid__icon {
        font-size: 2.5rem;
    }
}

/* ==========================================================================
   Aspect Ratio Variants (Optional)
   ========================================================================== */

/* Portrait aspect ratio */
.masonry-grid__item.aspect-portrait::before {
    padding-bottom: 133.33%; /* 3:4 ratio */
}

/* Landscape aspect ratio */
.masonry-grid__item.aspect-landscape::before {
    padding-bottom: 75%; /* 4:3 ratio */
}

/* Wide aspect ratio */
.masonry-grid__item.aspect-wide::before {
    padding-bottom: 56.25%; /* 16:9 ratio */
}

/* Square aspect ratio (explicit) */
.masonry-grid__item.aspect-square::before {
    padding-bottom: 100%; /* 1:1 ratio */
}

/* ==========================================================================
   Loading State
   ========================================================================== */

.masonry-grid__item.is-loading .masonry-grid__image {
    opacity: 0;
}

.masonry-grid__item.is-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid #f3f3f3;
    border-top-color: #333;
    border-radius: 50%;
    animation: masonry-spinner 0.8s linear infinite;
}

@keyframes masonry-spinner {
    to { transform: rotate(360deg); }
}

/* ==========================================================================
   Accessibility
   ========================================================================== */

/* Focus state for keyboard navigation */
.masonry-grid__item:focus {
    outline: 2px solid #4a90e2;
    outline-offset: 2px;
}

.masonry-grid__item:focus:not(:focus-visible) {
    outline: none;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .masonry-grid__image,
    .masonry-grid__overlay,
    .masonry-grid__title,
    .masonry-grid__icon {
        transition: none;
    }

    .masonry-grid__item:hover .masonry-grid__image {
        transform: none;
    }
}