/**
 * Linear Regression Visualizer Styles
 *
 * Visualization-specific styles only. Common styles are in visualizations.css.
 */

/* ============================================
   LR-Specific CSS Custom Properties
   ============================================ */
:root {
    --lr-point-color: #377eb8;
    --lr-point-stroke: #2a5f8f;
    --lr-fit-color: #e41a1c;
    --lr-residual-color: rgba(76, 175, 80, 0.5);
    --lr-gd-color: #ff9800;
    --lr-loss-gradient-start: #2196F3;
    --lr-loss-gradient-end: #F44336;
}

[data-theme="gruvbox-dark"] {
    --lr-point-color: #83a598;
    --lr-point-stroke: #458588;
    --lr-fit-color: #fb4934;
    --lr-residual-color: rgba(184, 187, 38, 0.5);
    --lr-gd-color: #fe8019;
    --lr-loss-gradient-start: #458588;
    --lr-loss-gradient-end: #cc241d;
}

/* ============================================
   Canvas Styling
   ============================================ */
#regression-canvas {
    cursor: crosshair;
    position: relative;
    z-index: 2;
}

/* ============================================
   Legend Colors
   ============================================ */
.legend-color.data-point {
    background-color: var(--lr-point-color);
    border-color: var(--lr-point-stroke);
    border-radius: 50%;
}

.legend-line.fit-line {
    background-color: var(--lr-fit-color);
    height: 3px;
    width: 24px;
}

.legend-line.residual-line {
    background-color: var(--lr-residual-color);
    height: 2px;
    width: 24px;
    border-style: dashed;
}

.legend-line.gd-line {
    background-color: var(--lr-gd-color);
    height: 3px;
    width: 24px;
    border-style: dashed;
}

/* ============================================
   Controls Panel Layout
   ============================================ */
.lr-controls-panel {
    display: flex;
    gap: 20px;
}

.lr-options-col {
    flex: 1;
}

.lr-option-group {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}

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

.lr-options-col .option-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lr-options-col .option-row > label:first-child {
    min-width: 55px;
    font-size: 12px;
    margin: 0;
}

.lr-options-col .option-row select {
    width: auto;
    min-width: 120px;
    font-size: 12px;
}

.lr-options-col .checkbox-label {
    font-size: 12px;
    margin-right: 10px;
}

/* Right column: Playback */
.lr-playback-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    border-left: 1px solid var(--viz-border);
    padding-left: 20px;
}

.lr-playback-col .btn-toolbar {
    display: flex;
    gap: 4px;
}

.lr-playback-col .btn-toolbar .btn {
    padding: 4px 8px;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 992px) {
    .lr-controls-panel {
        flex-direction: column;
    }

    .lr-playback-col {
        border-left: none;
        border-top: 1px solid var(--viz-border);
        padding-left: 0;
        padding-top: 15px;
    }
}