/* ========================================
   Photo Collage - Premium Styling Stylesheet
   ======================================== */

.collage-body {
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Outer layout wrapper */
.collage-main-container {
    display: flex;
    flex: 1;
    max-width: 100%;
    overflow: hidden;
    position: relative;
}

@media (max-width: 1024px) {
    .collage-main-container {
        flex-direction: column;
    }
}

/* Sidebar Styling with Glassmorphism */
.collage-sidebar {
    width: 380px;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    overflow-y: auto;
    max-height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
    gap: 24px;
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

@media (max-width: 1024px) {
    .collage-sidebar {
        width: 100%;
        max-height: none;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}

.sidebar-section {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

body.dark-theme .sidebar-section {
    background: rgba(255, 255, 255, 0.01);
}

.sidebar-section h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.sidebar-section h3 i {
    color: var(--accent);
}

/* Disabled styling for Image Adjust bar */
.disabled-section {
    opacity: 0.4;
    pointer-events: none;
    user-select: none;
    position: relative;
}

.disabled-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
}

/* Inputs & Labels */
.input-group {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-group select {
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    outline: none;
}

.input-group select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Sliders */
.input-group input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
    margin: 8px 0;
}

.input-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

.input-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-val {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    align-self: flex-end;
    margin-top: -4px;
}

/* Colors Input */
.input-group input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 100%;
    height: 38px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    background: transparent;
}

.input-group input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.input-group input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

/* Switch & Toggles */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: .4s;
    border: 1px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    box-shadow: var(--shadow-sm);
}

input:checked + .slider {
    background-color: var(--accent);
    border-color: transparent;
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Edit Panel Details */
.edit-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.edit-bar-header h3 {
    margin-bottom: 0;
}

.badge {
    background: var(--accent-glow);
    color: var(--accent);
    padding: 4px 8px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
}

.button-row {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.edit-btn {
    flex: 1;
    padding: 8px 10px;
    font-size: 12px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.edit-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-light);
}

.edit-btn.danger-btn {
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.edit-btn.danger-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
}

/* Export Buttons */
.export-btn {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
    border: none;
    color: white;
}

.export-btn:last-child {
    margin-bottom: 0;
}

.png-btn {
    background: var(--grad-primary);
    box-shadow: 0 4px 15px var(--accent-glow);
}

.png-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.3);
}

.pdf-btn {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.15);
}

.pdf-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

/* Preview Content Grid Area */
.collage-preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
    background: var(--bg-tertiary);
    overflow: auto;
    align-items: center;
    position: relative;
    max-height: calc(100vh - 70px);
}

.canvas-instructions {
    margin-bottom: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    width: fit-content;
}

.canvas-instructions i {
    color: var(--accent);
}

.canvas-wrapper {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 40px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
    box-shadow: inset 0 4px 20px rgba(0,0,0,0.02);
    min-height: 800px;
    width: 100%;
}

/* ========================================================
   Live Canvas Styles (Dynamic Dimensions in JS based on sizes)
   ======================================================== */
.collage-canvas {
    background: #ffffff;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
    box-sizing: border-box;
    display: grid;
    transition: width 0.4s ease, height 0.4s ease;
}

/* Show dashed lines behind image placements when grid mode active */
.collage-canvas.show-grid-lines {
    background-image: 
        radial-gradient(var(--border-color) 1px, transparent 1px),
        radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Grid Slots styling */
.collage-slot {
    position: relative;
    overflow: hidden;
    background: #f8fafc;
    border: 1px dashed rgba(99, 102, 241, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
}

body.dark-theme .collage-slot {
    background: #1e293b;
}

.collage-slot:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent);
}

/* Slot selection focus */
.collage-slot.selected-slot {
    border: 3px solid var(--accent) !important;
    box-shadow: inset 0 0 0 2px white, 0 0 15px var(--accent-glow);
    z-index: 5;
}

/* Slot UI labels / upload indicators */
.slot-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    pointer-events: none;
    text-align: center;
    padding: 10px;
}

.slot-placeholder i {
    font-size: 24px;
    color: var(--text-muted);
    opacity: 0.7;
    transition: var(--transition);
}

.collage-slot:hover .slot-placeholder i {
    color: var(--accent);
    transform: scale(1.15);
}

/* Dynamically loaded images within slots */
.slot-image-container {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
    pointer-events: none;
}

.slot-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transform-origin: center center;
    transition: filter 0.15s ease;
}

/* Grid Templates */
/* 2 Images horizontal */
.grid-2 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr;
}

/* 4 Images square grid */
.grid-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

/* 6 Images portrait stack */
.grid-6 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr 1fr;
}

/* 6 Images horizontal grid */
.grid-6-horiz {
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}

/* Trending Layout 1 (Hero Left, Two smaller stacked on Right) */
.grid-trending {
    grid-template-columns: 1.8fr 1fr;
    grid-template-rows: 1fr 1fr;
}

.grid-trending .collage-slot:nth-child(1) {
    grid-row: span 2;
}

/* Trending Layout 2 (1 Top main, 4 smaller stacked below) */
.grid-trending-2 {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: 1.5fr 1fr;
}

.grid-trending-2 .collage-slot:nth-child(1) {
    grid-column: span 4;
}

/* Delete Button on cell hover */
.slot-delete-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: white;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 8;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.collage-slot:hover .slot-delete-btn {
    opacity: 1;
}

.slot-delete-btn:hover {
    background: #dc2626;
    transform: scale(1.15);
}