/* ============================================
   Canvas - A4 WYSIWYG Editor
   ============================================ */

.canvas-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    padding: 0 20px;
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
    flex-shrink: 0;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.canvas-info {
    font-size: 13px;
    color: #6b7280;
    font-weight: 500;
}

/* ============================================
   Canvas Container & Zoom
   ============================================ */

.canvas-container {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: #f3f4f6;
}

.canvas-wrapper {
    position: relative;
    transform-origin: center center;
    transition: transform 0.2s ease;
}

/* Zoom levels */
.canvas-wrapper[data-zoom="50"] { transform: scale(0.5); }
.canvas-wrapper[data-zoom="75"] { transform: scale(0.75); }
.canvas-wrapper[data-zoom="100"] { transform: scale(1); }
.canvas-wrapper[data-zoom="125"] { transform: scale(1.25); }
.canvas-wrapper[data-zoom="150"] { transform: scale(1.5); }

/* ============================================
   A4 Canvas (210mm x 297mm @ 96dpi)
   ============================================ */

.canvas {
    /* A4 dimensions in pixels at 96dpi:
       210mm = 794px
       297mm = 1123px */
    width: 794px;
    min-height: 1123px;
    background: #ffffff;
    box-shadow: 0 0 20px rgba(0,0,0,0.1),
                0 0 60px rgba(0,0,0,0.05);
    position: relative;
    padding: 40px;
}

.canvas.show-grid {
    background-image:
        linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* ============================================
   Canvas Elements
   ============================================ */

/* Canvas Structure */
.canvas-container {
    position: relative;
    margin-bottom: 16px;
}

.canvas-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.canvas-column {
    flex: 1;
    min-width: 0;
    position: relative;
}

/* Base Element */
.element {
    position: relative;
    min-height: 24px;
    padding: 8px 12px;
    margin-bottom: 8px;
    border: 2px solid transparent;
    border-radius: 4px;
    transition: all 0.2s ease;
    cursor: pointer;
    user-select: none;
}

.element.highlight {
    border-color: #93c5fd;
    background: rgba(147, 197, 253, 0.1);
}

.element.selected {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.element-readonly {
    background: rgba(251, 191, 36, 0.05);
    border-left: 3px solid #fbbf24;
}

.element-readonly .readonly-indicator {
    position: absolute;
    top: -8px;
    right: -8px;
    background: #fef3c7;
    color: #92400e;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    font-weight: 600;
    z-index: 5;
}

/* Element hover toolbar */
.canvas-element .element-toolbar {
    display: none;
    position: absolute;
    top: -32px;
    left: 0;
    background: #1f2937;
    padding: 4px;
    border-radius: 4px;
    gap: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    z-index: 10;
}

.canvas-element:hover .element-toolbar,
.canvas-element.selected .element-toolbar {
    display: flex;
}

.element-toolbar button {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    color: white;
    transition: background 0.2s;
}

.element-toolbar button:hover {
    background: #374151;
}

/* ============================================
   Element Types
   ============================================ */

/* Text Element */
.element-text {
    font-size: 14px;
    line-height: 1.6;
}

.element-label {
    font-weight: 600;
    color: #374151;
    margin-right: 6px;
}

.element-value {
    color: #1f2937;
}

/* Table Element */
.element-table {
    padding: 0;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.invoice-table thead {
    background: #f9fafb;
}

.invoice-table th {
    border: 1px solid #e5e7eb;
    padding: 10px;
    text-align: left;
    font-weight: 600;
    color: #374151;
}

.invoice-table td {
    border: 1px solid #e5e7eb;
    padding: 10px;
    color: #1f2937;
}

.invoice-table tbody tr:hover {
    background: rgba(249, 250, 251, 0.5);
}

.empty-table {
    text-align: center;
    color: #9ca3af;
    font-style: italic;
    padding: 24px !important;
}

/* Image Element */
.element-image {
    text-align: center;
}

.element-image-content {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    background: #f9fafb;
    border: 2px dashed #d1d5db;
    border-radius: 8px;
    color: #9ca3af;
    font-size: 14px;
    font-weight: 500;
}

/* Container */
.canvas-container-box {
    position: relative;
    margin-bottom: 20px;
    min-height: 50px;
    border: 1px dashed #d1d5db;
    border-radius: 4px;
    padding: 10px;
}

.canvas-container-box.active {
    border-color: #667eea;
    border-style: solid;
}

.canvas-container-label {
    position: absolute;
    top: -10px;
    left: 10px;
    background: #ffffff;
    padding: 0 8px;
    font-size: 11px;
    font-weight: 600;
    color: #6b7280;
    text-transform: uppercase;
}

/* ============================================
   Canvas Status Bar
   ============================================ */

.canvas-status {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 32px;
    padding: 0 20px;
    background: #ffffff;
    border-top: 1px solid #e5e7eb;
    flex-shrink: 0;
    font-size: 12px;
    color: #6b7280;
}

.save-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.save-status.saving {
    color: #f59e0b;
}

.save-status.saving::before {
    content: '●';
    animation: pulse 1s ease-in-out infinite;
}

.save-status.saved {
    color: #10b981;
}

.save-status.saved::before {
    content: '✓';
}

.save-status.error {
    color: #ef4444;
}

.save-status.error::before {
    content: '✗';
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.separator {
    color: #d1d5db;
}

/* ============================================
   Empty Canvas State
   ============================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    padding: 60px 20px;
    text-align: center;
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 20px;
    font-weight: 600;
    color: #374151;
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    color: #9ca3af;
    max-width: 400px;
}

.canvas-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: #9ca3af;
}

.canvas-empty svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.canvas-empty p {
    font-size: 16px;
    margin-bottom: 8px;
}

.canvas-empty small {
    font-size: 13px;
    color: #d1d5db;
}

/* ============================================
   Drag & Drop Styles
   ============================================ */

.element-placeholder,
.column-placeholder {
    background: #dbeafe;
    border: 2px dashed #667eea;
    border-radius: 6px;
    margin: 8px 0;
    opacity: 0.6;
}

.element-dragging {
    min-height: 40px !important;
}

.column-dragging {
    min-width: 100px !important;
}

.ui-sortable-helper {
    opacity: 0.8 !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
    transform: scale(1.02);
    z-index: 1000 !important;
    cursor: move !important;
}

.ui-sortable-helper .element {
    border-color: #667eea !important;
    background: #f0f4ff !important;
}

.canvas-column.ui-sortable {
    min-height: 60px;
    transition: background 0.2s ease;
}

.canvas-column.ui-sortable-over {
    background: rgba(102, 126, 234, 0.05);
}

.canvas-row.ui-sortable {
    min-height: 80px;
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    body {
        background: white;
    }

    .app-header,
    .app-main aside,
    .canvas-toolbar,
    .canvas-status {
        display: none !important;
    }

    .app-main {
        display: block;
    }

    .canvas-container {
        overflow: visible;
        padding: 0;
        background: white;
    }

    .canvas {
        box-shadow: none;
        width: 210mm;
        min-height: 297mm;
    }

    .canvas-element {
        border: none !important;
        cursor: default;
    }

    .element-toolbar {
        display: none !important;
    }
}