/* ============================================
   Interactive Math Visualizations
   ============================================ */

/* Container */
.interactive-widget {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    margin: 2rem 0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.interactive-widget-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid #e2e8f0;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-dark, #1f2937);
}

.interactive-widget-header .widget-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color, #2563eb);
    color: white;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    flex-shrink: 0;
}

.interactive-widget-header .widget-badge {
    margin-left: auto;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--primary-color, #2563eb);
    background: rgba(37, 99, 235, 0.08);
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

/* Canvas area */
.interactive-canvas-wrap {
    position: relative;
    background: #fafbfc;
}

.interactive-canvas-wrap canvas {
    display: block;
    width: 100%;
    cursor: crosshair;
}

/* Controls area */
.interactive-controls {
    padding: 1rem 1.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
    border-top: 1px solid #e2e8f0;
    background: #fafbfc;
}

/* Slider control */
.interactive-slider {
    flex: 1;
    min-width: 140px;
}

.interactive-slider label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.35rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-dark, #1f2937);
}

.interactive-slider .slider-value {
    font-weight: 700;
    color: var(--primary-color, #2563eb);
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
}

.interactive-slider input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    outline: none;
    cursor: pointer;
}

.interactive-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color, #2563eb);
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 1px 4px rgba(37, 99, 235, 0.3);
    transition: transform 0.15s ease;
}

.interactive-slider input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.interactive-slider input[type="range"]::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(1.2);
}

.interactive-slider input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color, #2563eb);
    border: none;
    border-radius: 50%;
    cursor: grab;
    box-shadow: 0 1px 4px rgba(37, 99, 235, 0.3);
}

/* Toggle buttons */
.interactive-toggles {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid #e2e8f0;
    background: #fafbfc;
}

.interactive-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    border: 1.5px solid #cbd5e1;
    background: white;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    font-family: inherit;
    color: var(--text-light, #6b7280);
}

.interactive-toggle:hover {
    border-color: #94a3b8;
}

.interactive-toggle.active {
    border-color: var(--primary-color, #2563eb);
    background: rgba(37, 99, 235, 0.06);
    color: var(--primary-color, #2563eb);
}

.interactive-toggle .toggle-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* Info display */
.interactive-info {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    font-size: 0.82rem;
    color: var(--text-dark, #1f2937);
    background: white;
}

.interactive-info .info-item {
    display: flex;
    align-items: baseline;
    gap: 0.3rem;
}

.interactive-info .info-label {
    color: var(--text-light, #6b7280);
    font-weight: 500;
}

.interactive-info .info-value {
    font-weight: 700;
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
    color: var(--primary-color, #2563eb);
}

/* Function input */
.interactive-fn-input {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid #e2e8f0;
    background: #fafbfc;
    align-items: center;
}

.interactive-fn-input label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-dark, #1f2937);
    white-space: nowrap;
}

.interactive-fn-input input[type="text"] {
    flex: 1;
    padding: 0.4rem 0.75rem;
    border: 1.5px solid #cbd5e1;
    border-radius: 6px;
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.2s ease;
    color: var(--text-dark, #1f2937);
    min-width: 0;
}

.interactive-fn-input input[type="text"]:focus {
    border-color: var(--primary-color, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.interactive-fn-input button {
    padding: 0.4rem 0.9rem;
    background: var(--primary-color, #2563eb);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.2s ease;
    white-space: nowrap;
    font-family: inherit;
}

.interactive-fn-input button:hover {
    background: var(--primary-dark, #1d4ed8);
}

/* Tooltip on canvas */
.canvas-tooltip {
    position: absolute;
    background: rgba(31, 41, 55, 0.9);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 5px;
    font-size: 0.75rem;
    font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
    pointer-events: none;
    white-space: nowrap;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.15s ease;
}

.canvas-tooltip.visible {
    opacity: 1;
}

/* Responsive */
@media (max-width: 640px) {
    .interactive-controls {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .interactive-slider {
        min-width: 100%;
    }
    
    .interactive-fn-input {
        flex-direction: column;
        gap: 0.4rem;
    }
    
    .interactive-fn-input input[type="text"] {
        width: 100%;
    }
    
    .interactive-info {
        gap: 0.5rem 1rem;
    }
    
    .interactive-toggles {
        gap: 0.35rem;
    }
}

/* ============================================
   Improved box headers (replace emojis)
   ============================================ */

.info-box h4,
.example-box h4,
.warning-box h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-box h4::before,
.example-box h4::before,
.warning-box h4::before {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 5px;
    font-size: 0.7rem;
    font-weight: 800;
    line-height: 1;
    font-family: inherit;
}

.info-box h4::before {
    content: "i";
    background: #2563eb;
    color: white;
    font-style: italic;
}

.example-box h4::before {
    content: "?";
    background: #d97706;
    color: white;
}

.warning-box h4::before {
    content: "!";
    background: #dc2626;
    color: white;
}