/* ==========================================================================
   Harsh Verma Portfolio - Fullscreen Lightbox Modal System
   High-performance technical diagram & screenshot viewer with zoom & pan
   ========================================================================== */

/* Prevent body scroll when lightbox is active */
body.hv-lightbox-open {
    overflow: hidden !important;
    touch-action: none;
}

/* Lightbox Modal Root Container */
.hv-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 999999;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: rgba(6, 10, 20, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: #f8fafc;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.28s ease;
    user-select: none;
    -webkit-user-select: none;
}

.hv-lightbox.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Native Fullscreen Container Mode */
.hv-lightbox:fullscreen,
.hv-lightbox:-webkit-full-screen,
.hv-lightbox:-moz-full-screen,
.hv-lightbox:-ms-fullscreen {
    width: 100vw;
    height: 100vh;
    background: #060a14;
}

/* --------------------------------------------------------------------------
   Top Toolbar / Header
   -------------------------------------------------------------------------- */
.hv-lb-header {
    position: relative;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: linear-gradient(180deg, rgba(11, 17, 32, 0.88) 0%, rgba(11, 17, 32, 0.4) 80%, transparent 100%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    gap: 16px;
}

.hv-lb-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.hv-lb-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 9999px;
    background: rgba(59, 130, 246, 0.18);
    border: 1px solid rgba(96, 165, 250, 0.35);
    color: #93c5fd;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.hv-lb-counter {
    display: inline-flex;
    align-items: center;
    font-size: 12.5px;
    color: #94a3b8;
    font-weight: 600;
    white-space: nowrap;
    padding: 3px 8px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 6px;
    flex-shrink: 0;
}

.hv-lb-title {
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    letter-spacing: -0.2px;
}

/* Action Toolbar Buttons */
.hv-lb-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.hv-lb-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 38px;
    min-width: 38px;
    padding: 0 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.18s ease;
    text-decoration: none;
}

.hv-lb-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.28);
    transform: translateY(-1px);
    text-decoration: none;
}

.hv-lb-btn:active {
    transform: translateY(0);
}

.hv-lb-btn.icon-only {
    padding: 0;
    width: 38px;
}

.hv-lb-btn-close {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.35);
    color: #fca5a5;
}

.hv-lb-btn-close:hover {
    background: rgba(239, 68, 68, 0.3);
    color: #ffffff;
    border-color: rgba(239, 68, 68, 0.5);
}

.hv-lb-btn-repo {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(129, 140, 248, 0.35);
    color: #c7d2fe;
}

.hv-lb-btn-repo:hover {
    background: rgba(99, 102, 241, 0.35);
    color: #ffffff;
    border-color: rgba(129, 140, 248, 0.6);
}

.hv-lb-zoom-level {
    font-size: 12px;
    font-weight: 700;
    color: #94a3b8;
    min-width: 44px;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Stage / Viewport (Main Canvas Area)
   -------------------------------------------------------------------------- */
.hv-lb-stage {
    position: relative;
    flex: 1;
    width: 100%;
    height: 100%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: none;
}

.hv-lb-image-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 94vw;
    max-height: 82vh;
    transition: transform 0.15s ease-out;
    transform-origin: center center;
    cursor: default;
}

.hv-lb-image-wrap.can-drag {
    cursor: grab;
}

.hv-lb-image-wrap.is-dragging {
    cursor: grabbing;
    transition: none !important;
}

.hv-lb-image {
    display: block;
    max-width: 100%;
    max-height: 80vh;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.08);
    transition: opacity 0.25s ease, filter 0.25s ease;
}

.hv-lb-image.loading {
    opacity: 0.3;
    filter: blur(8px);
}

/* Spinner */
.hv-lb-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 44px;
    height: 44px;
    border: 3px solid rgba(255, 255, 255, 0.12);
    border-top-color: #38bdf8;
    border-radius: 50%;
    animation: hv-lb-spin 0.75s linear infinite;
    pointer-events: none;
    display: none;
    z-index: 10;
}

.hv-lb-loader.active {
    display: block;
}

@keyframes hv-lb-spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Navigation Arrow Controls */
.hv-lb-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 25;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: #f8fafc;
    font-size: 28px;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.2s ease;
    outline: none;
}

.hv-lb-nav-btn:hover {
    background: rgba(30, 41, 59, 0.95);
    border-color: rgba(56, 189, 248, 0.6);
    color: #38bdf8;
    transform: translateY(-50%) scale(1.08);
}

.hv-lb-nav-btn:active {
    transform: translateY(-50%) scale(0.96);
}

.hv-lb-prev {
    left: 20px;
}

.hv-lb-next {
    right: 20px;
}

.hv-lb-nav-btn[disabled] {
    opacity: 0.2;
    cursor: not-allowed;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   Bottom Information Bar & Captions
   -------------------------------------------------------------------------- */
.hv-lb-footer {
    position: relative;
    z-index: 20;
    padding: 16px 24px 18px;
    background: linear-gradient(0deg, rgba(8, 12, 22, 0.98) 0%, rgba(8, 12, 22, 0.85) 80%, transparent 100%);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hv-lb-caption-content {
    max-width: 960px;
    margin: 0 auto;
    text-align: center;
}

.hv-lb-caption-title {
    font-size: 17px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 4px;
    letter-spacing: -0.2px;
}

.hv-lb-caption-desc {
    font-size: 13.5px;
    color: #cbd5e1;
    line-height: 1.5;
    margin: 0 0 10px;
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.hv-lb-caption-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.hv-lb-tag {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.08);
    color: #94a3b8;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.hv-lb-footer-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Thumbnail Strip Drawer
   -------------------------------------------------------------------------- */
.hv-lb-thumbs-wrap {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: center;
    overflow: hidden;
}

.hv-lb-thumbs-strip {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    padding: 4px 10px;
    max-width: 100%;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.hv-lb-thumbs-strip::-webkit-scrollbar {
    height: 4px;
}
.hv-lb-thumbs-strip::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.hv-lb-thumb-item {
    position: relative;
    width: 60px;
    height: 38px;
    border-radius: 6px;
    overflow: hidden;
    border: 2px solid transparent;
    cursor: pointer;
    flex-shrink: 0;
    opacity: 0.55;
    transition: all 0.18s ease;
    background: #0b1120;
}

.hv-lb-thumb-item:hover {
    opacity: 0.9;
    border-color: rgba(255, 255, 255, 0.35);
    transform: translateY(-2px);
}

.hv-lb-thumb-item.active {
    opacity: 1;
    border-color: #38bdf8;
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.45);
    transform: translateY(-2px);
}

.hv-lb-thumb-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* --------------------------------------------------------------------------
   Floating Diagram Inspector Badge on Cards (Interactive Triggers)
   -------------------------------------------------------------------------- */
.hv-diagram-expand-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background: rgba(11, 17, 32, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 9999px;
    color: #e2e8f0;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.3px;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
    text-decoration: none !important;
}

.hv-diagram-expand-badge:hover {
    background: #2563eb;
    border-color: #60a5fa;
    color: #ffffff !important;
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.45);
}

.hv-diagram-expand-badge i {
    font-size: 14px;
}

/* Hover prompt overlay on thumbnails */
.proj-thumb-wrapper:hover .hv-diagram-expand-badge,
.work-container:hover .hv-diagram-expand-badge {
    border-color: rgba(56, 189, 248, 0.5);
    color: #38bdf8;
}

/* Cursor indicator for clickable diagram cards */
.hv-lightbox-clickable {
    cursor: zoom-in;
}

/* --------------------------------------------------------------------------
   Responsive Rules
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .hv-lb-header {
        padding: 10px 14px;
        gap: 8px;
    }
    .hv-lb-title {
        max-width: 140px;
        font-size: 13.5px;
    }
    .hv-lb-btn.hide-mobile {
        display: none !important;
    }
    .hv-lb-btn {
        height: 34px;
        min-width: 34px;
        padding: 0 8px;
        font-size: 12px;
    }
    .hv-lb-btn.icon-only {
        width: 34px;
    }
    .hv-lb-nav-btn {
        width: 42px;
        height: 42px;
        font-size: 22px;
    }
    .hv-lb-prev {
        left: 8px;
    }
    .hv-lb-next {
        right: 8px;
    }
    .hv-lb-footer {
        padding: 12px 14px 14px;
    }
    .hv-lb-caption-title {
        font-size: 15px;
    }
    .hv-lb-caption-desc {
        font-size: 12px;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .hv-lb-thumbs-wrap {
        display: none; /* Hide thumbnails on small mobile screens to preserve viewport */
    }
}