/* Canvas Styles */

.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background-color: var(--bg-primary);
}

.infinite-canvas {
    width: 100%;
    height: 100%;
    cursor: grab;
    user-select: none;
    overflow: visible;
}

.infinite-canvas:active {
    cursor: grabbing;
}

#tables-layer,
#relationships-layer {
    transform-origin: 0 0;
}

.infinite-canvas.connecting {
    cursor: crosshair;
}

.grid-background {
    pointer-events: none;
}

/* ERD Stats Box */
.erd-stats-box {
    position: absolute;
    bottom: 20px;
    left: 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    box-shadow: 0 2px 8px var(--shadow-color);
    font-size: 1rem;
    color: var(--text-secondary);
    z-index: 50;
    min-width: 160px;
}
.erd-stats-row {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 2px 0;
}
.erd-stats-label {
    font-weight: 600;
    color: var(--text-primary);
}

/* File Indicator */
.file-indicator {
    position: absolute;
    top: 20px;
    right: 20px;
    display: none;
    align-items: center;
    gap: 0.4rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.35rem 0.65rem;
    box-shadow: 0 2px 8px var(--shadow-color);
    font-size: 1rem;
    color: var(--text-secondary);
    z-index: 50;
    max-width: 260px;
    pointer-events: none;
}

.file-indicator.visible {
    display: flex;
}

.file-indicator .icon {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    opacity: 0.6;
}

.file-indicator-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Zoom Controls */
.zoom-controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 50;
}

.zoom-controls .btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    font-size: 1.25rem;
    font-weight: bold;
}

.zoom-level {
    font-size: 1rem;
    color: var(--text-secondary);
    padding: 0.25rem 0;
    min-width: 45px;
    text-align: center;
}

/* Canvas Instructions */
.canvas-instructions {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 1rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    color: var(--text-muted);
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 50;
    pointer-events: none;
    opacity: 0.8;
}

/* Connection Line Preview */
.connection-preview {
    stroke: var(--accent-color);
    stroke-width: 2;
    stroke-dasharray: 5, 5;
    fill: none;
    pointer-events: none;
}

/* Relationship Lines */
.relationship-line {
    stroke: var(--relationship-color);
    stroke-width: 2;
    fill: none;
    cursor: pointer;
    transition: stroke-width 0.15s ease;
}

.relationship-line:hover {
    stroke-width: 3;
}

.relationship-line.one-to-one {
    stroke: var(--relationship-one-to-one);
}

.relationship-line.one-to-many {
    stroke: var(--relationship-one-to-many);
}

.relationship-line.many-to-many {
    stroke: var(--relationship-many-to-many);
}

.relationship-line.highlighted {
    stroke-width: 4;
    filter: drop-shadow(0 0 4px var(--accent-color));
}

/* Selected relationship */
.relationship-group.selected .relationship-line {
    stroke: var(--accent-color);
    stroke-width: 3;
}

/* Relationship endpoints */
.relationship-endpoint {
    fill: var(--accent-color);
    stroke: var(--bg-primary);
    stroke-width: 2;
    cursor: grab;
    opacity: 0;
    transition: opacity 0.15s ease, r 0.15s ease;
    pointer-events: none;
}

.relationship-group.selected .relationship-endpoint {
    opacity: 1;
    pointer-events: auto;
}

.relationship-endpoint:hover {
    r: 10;
    cursor: grab;
}

.relationship-endpoint:active {
    cursor: grabbing;
}

/* Selection Box */
.selection-box {
    fill: var(--accent-color-alpha);
    stroke: var(--accent-color);
    stroke-width: 1;
    stroke-dasharray: 4, 4;
}

/* Mini Map (future enhancement) */
.minimap {
    position: absolute;
    bottom: 80px;
    left: 20px;
    width: 150px;
    height: 100px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 2px 8px var(--shadow-color);
    z-index: 50;
}

.minimap-viewport {
    position: absolute;
    border: 2px solid var(--accent-color);
    background-color: var(--accent-color-alpha);
    pointer-events: none;
}