/**
 * L1/L2 Regularization Visualizer Styles
 */

/* ============================================
   Custom Properties
   ============================================ */
:root {
    --reg-l1-color: #e41a1c;
    --reg-l2-color: #377eb8;
    --reg-elastic-color: #984ea3;
    --reg-none-color: #6c757d;
    --reg-loss-color: #4daf4a;
    --reg-optimal-color: #ff7f00;
    --reg-path-color: rgba(255, 127, 0, 0.7);
    --reg-contour-color: rgba(77, 175, 74, 0.35);
    --reg-constraint-fill: rgba(55, 126, 184, 0.08);
    --reg-surface-warm: #b2182b;
    --reg-surface-cool: #2166ac;
    --reg-surface-mid: #f7f7f7;
    --reg-grid-line: rgba(0, 0, 0, 0.08);
    --reg-axis-color: #333333;
    --reg-zero-marker: rgba(0, 0, 0, 0.15);
    --reg-gd-color: #1a6dd4;
}

[data-theme="gruvbox-dark"] {
    --reg-l1-color: var(--gruvbox-red);
    --reg-l2-color: var(--gruvbox-blue);
    --reg-elastic-color: var(--gruvbox-purple);
    --reg-none-color: var(--gruvbox-gray);
    --reg-loss-color: var(--gruvbox-green);
    --reg-optimal-color: var(--gruvbox-orange);
    --reg-path-color: rgba(254, 128, 25, 0.7);
    --reg-contour-color: rgba(184, 187, 38, 0.3);
    --reg-constraint-fill: rgba(131, 165, 152, 0.1);
    --reg-surface-warm: #fb4934;
    --reg-surface-cool: #83a598;
    --reg-surface-mid: #504945;
    --reg-grid-line: rgba(235, 219, 178, 0.06);
    --reg-axis-color: var(--gruvbox-fg);
    --reg-zero-marker: rgba(235, 219, 178, 0.12);
    --reg-gd-color: var(--gruvbox-blue);
}

/* ============================================
   Reg Type Button Styling
   ============================================ */
.reg-type-toggle .btn {
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
}

.reg-type-toggle .btn.active[data-reg="none"] {
    background: var(--reg-none-color);
    border-color: var(--reg-none-color);
    color: #fff;
}

.reg-type-toggle .btn.active[data-reg="l1"] {
    background: var(--reg-l1-color);
    border-color: var(--reg-l1-color);
    color: #fff;
}

.reg-type-toggle .btn.active[data-reg="l2"] {
    background: var(--reg-l2-color);
    border-color: var(--reg-l2-color);
    color: #fff;
}

.reg-type-toggle .btn.active[data-reg="elastic"] {
    background: var(--reg-elastic-color);
    border-color: var(--reg-elastic-color);
    color: #fff;
}

/* ============================================
   View Toggle
   ============================================ */
.reg-view-toggle .btn {
    padding: 4px 8px;
    font-size: 11px;
    font-weight: 600;
}

.reg-view-toggle .btn.active {
    background: var(--viz-text-muted);
    border-color: var(--viz-text-muted);
    color: #fff;
}

/* ============================================
   Lambda Badge
   ============================================ */
.reg-lambda-badge {
    font-family: var(--viz-mono-font);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    background: var(--viz-hover-bg);
    border: 1px solid var(--viz-border);
    color: var(--viz-text-muted);
}

/* ============================================
   Surface Toggles
   ============================================ */
.reg-surface-toggles {
    display: flex;
    gap: 14px;
    padding: 2px 0 6px;
    font-size: 11px;
    font-weight: 600;
    color: var(--viz-text-muted);
}

.reg-surface-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    user-select: none;
    opacity: 0.3;
    transition: opacity 0.15s;
    margin: 0;
    font-weight: 600;
}

.reg-surface-toggle.active {
    opacity: 1;
}

.reg-surface-swatch {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    display: inline-block;
    border: 1px solid rgba(0, 0, 0, 0.15);
}

.reg-swatch-total {
    background: linear-gradient(135deg, var(--reg-surface-cool), var(--reg-surface-mid), var(--reg-surface-warm));
}

[data-theme="gruvbox-dark"] .reg-surface-swatch {
    border-color: rgba(235, 219, 178, 0.15);
}

/* ============================================
   3D Canvas
   ============================================ */
#reg-3d-canvas {
    display: block;
    width: 100%;
    cursor: grab;
    background: var(--viz-canvas-bg);
    border-radius: 4px;
}

#reg-3d-canvas:active {
    cursor: grabbing;
}

/* ============================================
   2D Contour Canvas
   ============================================ */
#reg-contour-canvas {
    display: block;
    width: 100%;
    background: var(--viz-canvas-bg);
    border-radius: 4px;
}

/* ============================================
   Controls
   ============================================ */
.reg-controls-panel {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.reg-controls-panel .option-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.reg-controls-panel .option-row label {
    font-size: 12px;
    margin: 0;
    white-space: nowrap;
    min-width: 110px;
}

.reg-controls-panel .option-row input[type="range"] {
    flex: 1;
    max-width: 140px;
}

.reg-actions-row {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ============================================
   Math Tab
   ============================================ */
.reg-calc-panel {
    margin-top: 8px;
    padding: 10px 12px;
    background: var(--viz-hover-bg);
    border-radius: 6px;
    border: 1px solid var(--viz-border);
    font-family: var(--viz-mono-font);
    font-size: 12px;
    line-height: 1.6;
    color: var(--viz-text);
}

.reg-calc-row {
    display: flex;
    justify-content: space-between;
    padding: 1px 0;
}

.reg-calc-row.reg-calc-result {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 2px solid var(--viz-border);
    font-weight: 600;
}

.reg-calc-row .reg-val-l1 { color: var(--reg-l1-color); }
.reg-calc-row .reg-val-l2 { color: var(--reg-l2-color); }
.reg-calc-row .reg-val-loss { color: var(--reg-loss-color); }
.reg-calc-row .reg-val-optimal { color: var(--reg-optimal-color); }

/* ============================================
   Sparsity Indicator
   ============================================ */
.reg-sparsity-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    font-size: 11px;
}

.reg-sparsity-track {
    flex: 1;
    height: 6px;
    background: var(--viz-border);
    border-radius: 3px;
    overflow: hidden;
}

.reg-sparsity-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* ============================================
   Legend
   ============================================ */
.reg-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 11px;
    color: var(--viz-text-muted);
    padding: 6px 0;
}

.reg-legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.reg-legend-swatch {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    display: inline-block;
}

/* ============================================
   Comparison Table
   ============================================ */
.reg-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    margin-top: 8px;
}

.reg-compare-table th,
.reg-compare-table td {
    padding: 5px 8px;
    border: 1px solid var(--viz-border);
    text-align: center;
}

.reg-compare-table th {
    background: var(--viz-hover-bg);
    font-weight: 600;
    font-size: 11px;
}

.reg-compare-table td:first-child {
    text-align: left;
    font-weight: 600;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 992px) {
    .reg-type-toggle .btn {
        padding: 3px 6px;
        font-size: 11px;
    }

    .reg-controls-panel .option-row {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .reg-controls-panel .option-row label {
        min-width: auto;
    }
}