/**
 * @file
 * Masonry Grid Component
 * 
 * Asymmetric masonry layout for portfolio/project showcases.
 * Images keep their natural aspect ratios for organic visual rhythm.
 * Optional inline drawer for expanded project details.
 *
 * USAGE:
 * ------
 * <div class="masonry-grid">
 *   <div class="masonry-item">
 *     <img src="image.jpg" alt="Project">
 *     <div class="masonry-item-info">
 *       <h3 class="masonry-item-title">Title</h3>
 *       <h4 class="masonry-item-subtitle">Subtitle</h4>
 *       <p class="masonry-item-intro">Short intro...</p>
 *     </div>
 *     <div class="masonry-item-detail">
 *       <p>Extended content shown in drawer...</p>
 *     </div>
 *   </div>
 * </div>
 */

/* ==========================================================================
   MASONRY GRID - Container (CSS Columns)
   ========================================================================== */

.masonry-grid {
    column-count: 3;
    column-gap: 1.25rem;
    margin: 0 auto;
}

/* ==========================================================================
   MASONRY ITEM - Individual Card
   ========================================================================== */

.masonry-item {
    break-inside: avoid;
    margin-bottom: 1.25rem;
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.06),
        0 4px 16px rgba(0, 0, 0, 0.04);
    transition:
        transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        box-shadow 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.masonry-item:hover {
    transform: translateY(-3px);
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.10),
        0 16px 48px rgba(0, 0, 0, 0.06);
}

/* Active state when drawer is open for this item */
.masonry-item.masonry-item-active {
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.10),
        0 16px 48px rgba(0, 0, 0, 0.06);
}

/* ==========================================================================
   MASONRY ITEM - Image (Natural Aspect Ratio)
   ========================================================================== */

.masonry-item img {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.masonry-item:hover img {
    transform: scale(1.04);
}

/* Image container for overflow clipping during zoom */
.masonry-item-image {
    overflow: hidden;
    line-height: 0;
}

/* ==========================================================================
   MASONRY ITEM - Info (Title / Subtitle / Intro)
   ========================================================================== */

.masonry-item-info {
    padding: 1.25rem 1.25rem 0.75rem;
    text-align: center;
}

.masonry-item-title {
    font-family: Figtree, sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.3;
    color: #1a1a1a;
    margin: 0 0 0.35rem 0;
    text-align: center;
    letter-spacing: -0.01em;
}

.masonry-item-subtitle {
    font-family: Figtree, sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    color: #9ca3af;
    margin: 0 0 0.6rem 0;
    text-align: center;
    letter-spacing: 0.01em;
}

.masonry-item-intro {
    font-family: Figtree, sans-serif;
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.55;
    color: #4b5563;
    margin: 0;
    text-align: center;
}

/* ==========================================================================
   MASONRY ITEM - Expand Button (auto-added by JS when detail exists)
   Same gradient design as section-navigator next-tab button
   Default: himmel-kornblume. Override with masonry-btn-[gradient-name] on .masonry-grid
   ========================================================================== */

.masonry-item-expand {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem 1rem;
    cursor: pointer;
}

.masonry-item-expand-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    /* Default gradient: himmel-kornblume */
    background: linear-gradient(135deg, #89CFF0 0%, #6495ED 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    transition:
        transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        opacity 0.3s ease;
    outline: none !important;
    -webkit-tap-highlight-color: transparent;
}

/* Arrow icon - thick white chevron pointing DOWN */
.masonry-item-expand-arrow::before {
    content: '';
    width: 10px;
    height: 10px;
    border-right: 3.5px solid #ffffff;
    border-bottom: 3.5px solid #ffffff;
    border-radius: 2px;
    transform: rotate(45deg);
    margin-top: -3px;
}

/* No SVG needed — hide it */
.masonry-item-expand-arrow svg {
    display: none;
}

/* Hover — on arrow directly, matching section-navigator next-tab */
.masonry-item-expand-arrow:hover {
    transform: scale(1.1);
}

/* Active/click state */
.masonry-item-expand-arrow:active {
    transform: scale(0.95);
    outline: none !important;
    box-shadow: none !important;
}

/* Focus state — no ring */
.masonry-item-expand-arrow:focus,
.masonry-item-expand-arrow:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

/* Rotate arrow when item is active */
.masonry-item-active .masonry-item-expand-arrow {
    transform: rotate(180deg);
}

.masonry-item-active .masonry-item-expand-arrow:hover {
    transform: rotate(180deg) scale(1.1);
}

.masonry-item-active .masonry-item-expand-arrow:active {
    transform: rotate(180deg) scale(0.95);
}

/* ==========================================================================
   MASONRY BUTTONS - Gradient Options
   Add class to .masonry-grid: masonry-btn-[gradient-name]
   ========================================================================== */

.masonry-grid.masonry-btn-smaragd-aquamarin .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-smaragd-aquamarin .masonry-drawer-close {
    background: linear-gradient(to bottom right, #0d9488 0%, #0d9488 40%, #4BB3C8 100%);
}

.masonry-grid.masonry-btn-smaragd-erde .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-smaragd-erde .masonry-drawer-close {
    background: linear-gradient(to bottom right, #0d9488 0%, #0d9488 40%, #87A330 100%);
}

.masonry-grid.masonry-btn-meer-smaragd .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-meer-smaragd .masonry-drawer-close {
    background: linear-gradient(to bottom right, #7DD8C0 0%, #7DD8C0 40%, #0d9488 100%);
}

.masonry-grid.masonry-btn-meer-rubin .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-meer-rubin .masonry-drawer-close {
    background: linear-gradient(to bottom right, #7DD8C0 0%, #7DD8C0 40%, #D64D7A 100%);
}

.masonry-grid.masonry-btn-himmel-erde .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-himmel-erde .masonry-drawer-close {
    background: linear-gradient(to bottom right, #89CFF0 0%, #89CFF0 40%, #87A330 100%);
}

.masonry-grid.masonry-btn-himmel-rubin .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-himmel-rubin .masonry-drawer-close {
    background: linear-gradient(to bottom right, #89CFF0 0%, #89CFF0 40%, #D64D7A 100%);
}

.masonry-grid.masonry-btn-flieder-preussen .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-flieder-preussen .masonry-drawer-close {
    background: linear-gradient(to bottom right, #D8BFD8 0%, #D8BFD8 40%, #4BB3C8 100%);
}

.masonry-grid.masonry-btn-flieder-rubin .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-flieder-rubin .masonry-drawer-close {
    background: linear-gradient(to bottom right, #D8BFD8 0%, #D8BFD8 40%, #D64D7A 100%);
}

.masonry-grid.masonry-btn-heide-smaragd .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-heide-smaragd .masonry-drawer-close {
    background: linear-gradient(to bottom right, #DE98AB 0%, #DE98AB 40%, #0d9488 100%);
}

.masonry-grid.masonry-btn-aprikose-smaragd .masonry-item-expand-arrow,
.masonry-grid.masonry-btn-aprikose-smaragd .masonry-drawer-close {
    background: linear-gradient(to bottom right, #FBCEB1 0%, #FBCEB1 40%, #0d9488 100%);
}

/* Items without detail don't get pointer cursor */
.masonry-item:not(.masonry-has-detail) {
    cursor: default;
}

.masonry-item.masonry-has-detail {
    cursor: pointer;
}

/* ==========================================================================
   MASONRY ITEM - Hidden Detail Content (source for drawer)
   ========================================================================== */

.masonry-item-detail {
    display: none;
}

/* ==========================================================================
   MASONRY DRAWER - Inline Expand Panel (below grid)
   ========================================================================== */

.masonry-drawer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    margin-top: 2.5rem;
}

.masonry-drawer.masonry-drawer-open {
    max-height: 2000px;
    overflow: visible;
    transition: max-height 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Closing state — faster ease-out for snappy but smooth close */
.masonry-drawer.masonry-drawer-closing {
    max-height: 0;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.6, 1);
}

.masonry-drawer-inner {
    background: #ffffff;
    border-radius: 8px;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.06),
        0 4px 16px rgba(0, 0, 0, 0.04);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    position: relative;
    opacity: 0;
    transform: translateY(-10px);
    transition:
        opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.15s,
        transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.15s;
}

.masonry-drawer-open .masonry-drawer-inner {
    opacity: 1;
    transform: translateY(0);
}

/* Drawer - Image Side */
.masonry-drawer-image {
    overflow: hidden;
    line-height: 0;
}

.masonry-drawer-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    margin: 0;
}

/* Drawer - Content Side */
.masonry-drawer-content {
    padding: 2.5rem;
    padding-right: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    max-height: 500px;
    overflow: hidden;
}

.masonry-drawer-title {
    font-family: Figtree, sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: #1a1a1a;
    margin: 0 0 0.5rem 0;
    text-align: left;
    flex-shrink: 0;
}

.masonry-drawer-subtitle {
    font-family: Figtree, sans-serif;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.4;
    color: #9ca3af;
    margin: 0 0 1.25rem 0;
    text-align: left;
    flex-shrink: 0;
}

.masonry-drawer-text {
    font-family: Figtree, sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.65;
    color: #4b5563;
    text-align: left;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
    /* Scrollbar: same as card-accordion */
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    scrollbar-gutter: stable;
}

.masonry-drawer-text::-webkit-scrollbar {
    width: 6px;
}

.masonry-drawer-text::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 3px;
}

.masonry-drawer-text::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 3px;
    transition: background 0.3s ease;
}

/* Fade in scrollbar once drawer is open */
.masonry-drawer-open .masonry-drawer-text {
    animation: masonryFadeInScrollbar 0.3s ease 0.6s forwards;
}

@keyframes masonryFadeInScrollbar {
    to {
        scrollbar-color: #0d9488 transparent;
    }
}

.masonry-drawer-open .masonry-drawer-text::-webkit-scrollbar-thumb {
    animation: masonryFadeInThumb 0.3s ease 0.6s forwards;
}

@keyframes masonryFadeInThumb {
    to {
        background: #0d9488;
    }
}

.masonry-drawer-text::-webkit-scrollbar-thumb:hover {
    background: #0f766e !important;
}

.masonry-drawer-text p {
    margin: 0 0 0.75rem 0;
    text-align: left;
}

.masonry-drawer-text p:last-child {
    margin-bottom: 0;
}

/* Drawer - Close Button
   Same design/position/style as section-navigator next-tab button */
.masonry-drawer-close {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    /* Match corner radius on bottom-right */
    border-bottom-right-radius: 12px;
    /* Default gradient: himmel-kornblume */
    background: linear-gradient(135deg, #89CFF0 0%, #6495ED 100%);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
    transition:
        transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        opacity 0.3s ease;
    z-index: 10;
    outline: none !important;
    -webkit-tap-highlight-color: transparent;
}

/* X icon — two thick white bars crossing, same weight as arrow borders */
.masonry-drawer-close::before,
.masonry-drawer-close::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 0;
    border-top: 4px solid #ffffff;
    border-radius: 2px;
}

.masonry-drawer-close::before {
    transform: rotate(45deg);
}

.masonry-drawer-close::after {
    transform: rotate(-45deg);
}

/* Hide the SVG — using CSS X instead */
.masonry-drawer-close svg {
    display: none;
}

.masonry-drawer-close:hover {
    transform: scale(1.1);
}

.masonry-drawer-close:active {
    transform: scale(0.95);
    outline: none !important;
    box-shadow: none !important;
}

.masonry-drawer-close:focus,
.masonry-drawer-close:focus-visible {
    outline: none !important;
    box-shadow: none !important;
}

/* ==========================================================================
   RESPONSIVE - Column Count Adaptation
   ========================================================================== */

/* Desktop large: 4 columns */
@media (min-width: 1400px) {
    .masonry-grid {
        column-count: 4;
    }
}

/* Smart column limits for few items */
.masonry-grid-count-1 { column-count: 1 !important; max-width: 500px; }
.masonry-grid-count-2 { column-count: 2 !important; }
.masonry-grid-count-3 { column-count: 3 !important; }

@media (max-width: 1023px) {
    .masonry-grid-count-3 { column-count: 2 !important; }
}
@media (max-width: 639px) {
    .masonry-grid-count-1,
    .masonry-grid-count-2,
    .masonry-grid-count-3 { column-count: 1 !important; }
}

/* Laptop: 3 columns (default) */

/* Tablet: 2 columns */
@media (max-width: 1023px) {
    .masonry-grid {
        column-count: 2;
    }

    .masonry-drawer-inner {
        grid-template-columns: 1fr 1fr;
    }

    .masonry-drawer-content {
        padding: 2rem;
    }
}

/* Mobile: 1 column */
@media (max-width: 639px) {
    .masonry-grid {
        column-count: 1;
        column-gap: 0;
    }

    .masonry-item {
        margin-bottom: 1rem;
    }

    .masonry-drawer-inner {
        grid-template-columns: 1fr;
    }

    .masonry-drawer-image {
        max-height: 250px;
    }

    .masonry-drawer-content {
        padding: 1.5rem;
    }

    .masonry-drawer-title {
        font-size: 1.25rem;
    }
}

/* ==========================================================================
   MASONRY GRID - Scroll Reveal Animation
   ========================================================================== */

.masonry-item-animate {
    opacity: 0;
    transform: translateY(20px);
}

.masonry-item-animate.masonry-item-visible {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
        transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Staggered child animations */
.masonry-item-animate .masonry-item-title,
.masonry-item-animate .masonry-item-subtitle,
.masonry-item-animate .masonry-item-intro {
    opacity: 0;
    transform: translateY(10px);
}

.masonry-item-animate.masonry-item-visible .masonry-item-title {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s,
        transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
}

.masonry-item-animate.masonry-item-visible .masonry-item-subtitle {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.15s,
        transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.15s;
}

.masonry-item-animate.masonry-item-visible .masonry-item-intro {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s,
        transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s;
}