/* CSS Reset - Box model and basic normalization */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/* Color System - Design tokens for theory.toys dark-blue theme */

:root {
    /* Background colors - dark with blue tint */
    --bg-body: #0a0e14;
    --bg-navbar: #080b10;
    --bg-canvas: #080b10;
    --bg-panel: #0f1419;
    --bg-explanation: #0b0f13;
    --bg-section: #121820;

    /* Border colors - blue-tinted */
    --border-primary: #1a2633;
    --border-secondary: #1e2a3a;
    --border-subtle: #2a3f55;

    /* Text colors - mostly gray with selective blue highlights */
    --text-primary: #e0e0e0;
    --text-secondary: #ccc;
    --text-tertiary: #999;
    --text-muted: #888;
    --text-disabled: #555;
    --text-heading: #ccc;
    --text-subheading: #aaa;
    --text-bright: #fff;
    --text-dim: #666;
    --text-subtle: #6b7280;
    --text-gray: #9ca3af;

    /* Accent text - use for active/selected states */
    --text-accent-bright: #00ccff;
    --text-accent-muted: #0099cc;
    --text-accent-dark: #0077aa;

    /* Interactive element colors - blue highlights */
    --interactive-hover: #1a4d6d;
    --interactive-active: #0e3a55;
    --interactive-disabled: #1a2633;

    /* Canvas/visualization colors */
    --canvas-bg: #080b10;
    --canvas-border: #1a2633;
    --axis-color: #2a3f55;

    /* Highlight colors for visualizations */
    --highlight-blue: #9fc99f;
    --highlight-red: #ff6b6b;
    --highlight-green: #51cf66;
    --highlight-yellow: #6c9;
    --highlight-purple: #b589ff;
    --highlight-cyan: #51d9ff;

    /* Premium/accent colors - vibrant cyan */
    --accent-premium: #00ccff;
    --accent-premium-hover: #33ddff;

    /* Range slider colors - blue theme */
    --slider-track: #1a2633;
    --slider-thumb: #00ccff;
    --slider-thumb-hover: #33ddff;

    /* Gradient colors - blue tones */
    --gradient-button-start: #0099cc;
    --gradient-button-end: #0077aa;

    /* Semantic colors for data visualization */
    --color-success: #00ff88;
    --color-error: #ff6666;
    --color-warning: #ffaa00;

    /* Card backgrounds (currently hardcoded everywhere) */
    --bg-card: #0f0f0f;
    --bg-card-dark: #1a1a1a;

    /* Additional borders */
    --border-light: #444;

    /* Spacing scale - based on 4px grid */
    --space-xs: 8px;    /* 0.5rem */
    --space-sm: 12px;   /* 0.75rem */
    --space-md: 16px;   /* 1rem */
    --space-lg: 20px;   /* 1.25rem */
    --space-xl: 30px;   /* 1.875rem */
    --space-2xl: 40px;  /* 2.5rem */
    --space-3xl: 60px;  /* 3.75rem */

    /* Border radius scale */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;

    /* Font sizes */
    --text-xs: 0.85em;
    --text-sm: 0.9em;
    --text-base: 1em;
    --text-lg: 1.1em;
    --text-xl: 1.2em;
    --text-2xl: 1.5em;
    --text-3xl: 2em;
    --text-4xl: 2.5em;
    --text-5xl: 3em;

    /* Font families */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-mono: "Courier New", monospace;
}
/* Typography - Font families, sizes, and text styles */

body {
    font-family:
        -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu,
        Cantarell, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
}

/* Font families */
.font-mono,
#event-details {
    font-family: "Courier New", monospace;
}

/* Headings */
h1 {
    font-size: 2em;
    color: var(--text-secondary);
}

h2 {
    font-size: 2em;
    color: var(--text-secondary);
}

h3 {
    font-size: 1.5em;
    color: var(--text-subheading);
}

h4 {
    font-size: 1.2em;
    color: var(--text-subheading);
}

/* Text utilities */
em {
    color: var(--accent-premium);
    font-style: italic;
}

strong {
    color: var(--text-primary);
}
/* Utilities - Single-purpose utility classes */

/* Typography utilities */
.text-mono {
    font-family: var(--font-mono);
}

.text-sans {
    font-family: var(--font-sans);
}

.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

/* Text sizes */
.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }

/* Font weights */
.font-normal { font-weight: 400; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* Spacing utilities */
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }

/* Layout utilities */
.full-width {
    width: 100%;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

/* Flexbox utilities */
.flex {
    display: flex;
}

.flex-center {
    display: flex;
    justify-content: center;
    align-items: center;
}

.flex-column {
    display: flex;
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
/* Container - Main page containers and wrappers */

body {
    background-color: var(--bg-body);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
}

header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    margin-top: var(--space-lg);
}

header h1 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

header p {
    color: var(--text-muted);
    font-size: var(--text-lg);
}

/* Toy page headers (h1 + p pattern) */
.container > div > h1 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-md);
    margin-top: var(--space-lg);
    color: var(--text-secondary);
    text-align: center;
}

.container > div > h1 + p {
    color: var(--text-muted);
    font-size: var(--text-lg);
    text-align: center;
    margin-bottom: var(--space-2xl);
}
/* Grid - Layout grids for toys and landing page */

/* Main content grid - visualization on left, controls on right */
.main-content {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--space-lg);
}

@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Controls sidebar */
.controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Visualization containers */
.visualization-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Landing page categories */
#landing-categories {
    margin-top: var(--space-2xl);
}

.landing-category-section {
    margin-bottom: 50px;
}

.landing-category-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-primary);
}

.landing-category-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--text-disabled);
}

.landing-category-subtitle {
    font-size: 0.65em;
    color: var(--text-dim);
    margin-left: var(--space-sm);
}

.landing-toys-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-sm);
    column-gap: var(--space-md);
}

.landing-toys-column {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.landing-toy-item {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 0;
    transition: all 0.2s;
    font-size: 0.95em;
    display: block;
    line-height: 1.3;
}

.landing-toy-item:hover {
    color: var(--text-accent-bright);
}

.landing-toy-item.active {
    color: var(--text-accent-bright);
    font-weight: 600;
}

.landing-toy-item.disabled {
    color: var(--text-disabled);
    cursor: not-allowed;
}

.landing-toy-item.disabled:hover {
    color: var(--text-disabled);
}
/* Canvas - Visualization canvas elements */

canvas {
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

.visualization-container canvas {
    width: 100%;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

/* Specific canvas sizes */
#minkowski-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
    cursor: crosshair;
}

#mz-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#bloch-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#quantum-teleportation-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#heliocentric-canvas {
    width: 100%;
    height: 400px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#geocentric-canvas {
    width: 100%;
    height: 400px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#natural-deduction-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#coordination-games-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#vagueness-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#dutch-book-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#causal-inference-canvas,
    #doppler-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#doppler-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#sweep-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#inflation-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #minkowski-canvas {
        height: 500px;
    }

    #mz-canvas,
    #bloch-canvas,
    #quantum-teleportation-canvas {
        height: 500px;
    }

    #heliocentric-canvas,
    #geocentric-canvas {
        height: 350px;
    }

    #natural-deduction-canvas,
    #coordination-games-canvas,
    #vagueness-canvas,
    #dutch-book-canvas,
    #causal-inference-canvas,
    #doppler-canvas,
    #inflation-canvas,
    #quantum-zeno-canvas,
    #ibd-ibs-canvas,
    #relativistic-optics-canvas,
    #prospect-theory-canvas {
        height: 500px;
    }
}

#fair-division-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#quantum-zeno-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#gwas-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#ibd-ibs-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#relativistic-optics-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#prospect-theory-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

#tidal-evolution-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #tidal-evolution-canvas {
        height: 500px;
    }
}

#delayed-choice-eraser-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #delayed-choice-eraser-canvas {
        height: 500px;
    }
}

#bbn-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #bbn-canvas {
        height: 500px;
    }
}

#coalescent-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #coalescent-canvas {
        height: 500px;
    }
}

#stellar-evolution-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #stellar-evolution-canvas {
        height: 500px;
    }
}


#peer-disagreement-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #peer-disagreement-canvas {
        height: 500px;
    }
}

#rotating-disk-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #rotating-disk-canvas {
        height: 500px;
    }
}

#codon-usage-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #codon-usage-canvas {
        height: 500px;
    }
}

#recombination-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #recombination-canvas {
        height: 500px;
    }
}

#rabi-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #rabi-canvas {
        height: 500px;
    }
}

#ttv-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #ttv-canvas {
        height: 500px;
    }
}

#splicing-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #splicing-canvas {
        height: 500px;
    }
}

#relativistic-collisions-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #relativistic-collisions-canvas {
        height: 500px;
    }
}

#bell-test-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #bell-test-canvas {
        height: 500px;
    }
}
#information-cascades-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #information-cascades-canvas {
        height: 500px;
    }
}

#light-cone-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #light-cone-canvas {
        height: 500px;
    }
}

#public-goods-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #public-goods-canvas {
        height: 500px;
    }
}

#cr3bp-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #cr3bp-canvas {
        height: 500px;
    }
}

#linkage-mapping-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #linkage-mapping-canvas {
        height: 500px;
    }
}

#mullers-ratchet-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #mullers-ratchet-canvas {
        height: 500px;
    }
}

#thomas-precession-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #thomas-precession-canvas {
        height: 500px;
    }
}

#hom-dip-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #hom-dip-canvas {
        height: 500px;
    }
}

#sequent-calculus-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #sequent-calculus-canvas {
        height: 500px;
    }
}

#power-spectrum-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #power-spectrum-canvas {
        height: 500px;
    }
}

#migration-selection-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #migration-selection-canvas {
        height: 500px;
    }
}

#translation-kinetics-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #translation-kinetics-canvas {
        height: 500px;
    }
}

#paradox-explorer-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #paradox-explorer-canvas {
        height: 500px;
    }
}

#relativistic-beaming-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #relativistic-beaming-canvas {
        height: 500px;
    }
}

#landau-zener-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #landau-zener-canvas {
        height: 500px;
    }
}

#halo-mass-function-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #halo-mass-function-canvas {
        height: 500px;
    }
}

#asteroseismology-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #asteroseismology-canvas {
        height: 500px;
    }
}

#bao-ruler-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #bao-ruler-canvas {
        height: 500px;
    }
}

#gene-drive-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #gene-drive-canvas {
        height: 500px;
    }
}

#enhancer-logic-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #enhancer-logic-canvas {
        height: 500px;
    }
}

#supernova-lightcurve-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #supernova-lightcurve-canvas {
        height: 500px;
    }
}

#contractualism-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #contractualism-canvas {
        height: 500px;
    }
}

#em-field-transform-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #em-field-transform-canvas {
        height: 500px;
    }
}

#magnetism-emergence-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #magnetism-emergence-canvas {
        height: 500px;
    }
}

#transmission-spectroscopy-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #transmission-spectroscopy-canvas {
        height: 500px;
    }
}

#breeders-equation-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #breeders-equation-canvas {
        height: 500px;
    }
}

#moral-uncertainty-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #moral-uncertainty-canvas {
        height: 500px;
    }
}

#grover-search-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #grover-search-canvas {
        height: 500px;
    }
}

#chromatin-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #chromatin-canvas {
        height: 500px;
    }
}

#weak-lensing-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #weak-lensing-canvas {
        height: 500px;
    }
}

#relativistic-rocket-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #relativistic-rocket-canvas {
        height: 500px;
    }
}

#standard-sirens-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #standard-sirens-canvas {
        height: 500px;
    }
}

#reionization-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #reionization-canvas {
        height: 500px;
    }
}

#lens-geometry-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #lens-geometry-canvas {
        height: 500px;
    }
}

#fermat-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #fermat-canvas {
        height: 500px;
    }
}

#sz-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #sz-canvas {
        height: 500px;
    }
}

#h0-tension-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #h0-tension-canvas {
        height: 500px;
    }
}

#nbody-sheet-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #nbody-sheet-canvas {
        height: 500px;
    }
}

#dark-energy-mg-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #dark-energy-mg-canvas {
        height: 500px;
    }
}

#differential-photometry-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #differential-photometry-canvas {
        height: 500px;
    }
}

#galaxy-2d-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #galaxy-2d-canvas {
        height: 500px;
    }
}

#galaxy-profile-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #galaxy-profile-canvas {
        height: 500px;
    }
}

#psf-2d-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #psf-2d-canvas {
        height: 500px;
    }
}

#psf-radial-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #psf-radial-canvas {
        height: 500px;
    }
}

#rotation-curves-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #rotation-curves-canvas {
        height: 500px;
    }
}

#pulse-arrival-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #pulse-arrival-canvas {
        height: 500px;
    }
}

#timing-residuals-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #timing-residuals-canvas {
        height: 500px;
    }
}

#sky-position-canvas,
#measurements-canvas,
#residuals-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #sky-position-canvas,
    #measurements-canvas,
    #residuals-canvas {
        height: 500px;
    }
}

#aharonov-bohm-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #aharonov-bohm-canvas {
        height: 500px;
    }
}

#bohmian-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #bohmian-canvas {
        height: 500px;
    }
}

#berry-bloch-canvas,
#berry-phase-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #berry-bloch-canvas,
    #berry-phase-canvas {
        height: 500px;
    }
}

#spin-echo-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #spin-echo-canvas {
        height: 500px;
    }
}

#continuous-monitoring-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #continuous-monitoring-canvas {
        height: 500px;
    }
}

#qec-bitflip-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #qec-bitflip-canvas {
        height: 500px;
    }
}

#which-path-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #which-path-canvas {
        height: 500px;
    }
}

#adaptive-landscape-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #adaptive-landscape-canvas {
        height: 500px;
    }
}

#ess-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #ess-canvas {
        height: 500px;
    }
}

#phase-canvas,
#trait-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #phase-canvas,
    #trait-canvas {
        height: 500px;
    }
}

#birth-death-tree-canvas,
#birth-death-ltt-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #birth-death-tree-canvas,
    #birth-death-ltt-canvas {
        height: 500px;
    }
}

#main-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #main-canvas {
        height: 500px;
    }
}

#hamiltons-rule-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #hamiltons-rule-canvas {
        height: 500px;
    }
}

#phasing-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #phasing-canvas {
        height: 500px;
    }
}

#linkage-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #linkage-canvas {
        height: 500px;
    }
}

#read-simulator-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #read-simulator-canvas {
        height: 500px;
    }
}

#variant-calling-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #variant-calling-canvas {
        height: 500px;
    }
}

#g-matrix-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #g-matrix-canvas {
        height: 500px;
    }
}

#assembly-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #assembly-canvas {
        height: 500px;
    }
}

#crispr-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #crispr-canvas {
        height: 500px;
    }
}

#polygenic-score-canvas {
    width: 100%;
    height: 700px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: 4px;
}

@media (max-width: 1024px) {
    #polygenic-score-canvas {
        height: 500px;
    }
}
/* Explanation - Educational content sections */

.explanation {
    margin-top: var(--space-3xl);
    padding: var(--space-2xl);
    background-color: var(--bg-explanation);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
}

.explanation h2 {
    color: var(--text-secondary);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-lg);
}

.explanation h3 {
    color: var(--text-subheading);
    font-size: var(--text-2xl);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.explanation h4 {
    color: #aaa;
    font-size: var(--text-xl);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
    padding-left: var(--space-lg);
    border-left: 3px solid var(--border-primary);
}

.explanation p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
    max-width: 900px;
}

.explanation em {
    color: var(--accent-premium);
    font-style: italic;
}

.explanation strong {
    color: var(--text-primary);
}

/* Style h4 + following paragraphs like explanation-section */
.explanation h4 + p,
.explanation h4 + p + p {
    padding-left: var(--space-lg);
    border-left: 3px solid var(--border-primary);
    border-top: none;
    margin-top: 0;
}

/* Legacy support for manual HTML sections */
.explanation-section {
    margin-bottom: var(--space-xl);
    padding-left: var(--space-lg);
    border-left: 3px solid var(--border-primary);
}

.experiments {
    list-style: none;
    counter-reset: experiment-counter;
    margin-top: var(--space-lg);
}

.experiments li {
    counter-increment: experiment-counter;
    margin-bottom: 25px;
    padding: var(--space-lg);
    background-color: var(--bg-body);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--text-accent-dark);
    position: relative;
}

.experiments li::before {
    content: counter(experiment-counter);
    position: absolute;
    left: -15px;
    top: var(--space-md);
    background-color: var(--text-accent-dark);
    color: var(--text-accent-bright);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: var(--text-lg);
    border: 2px solid var(--text-accent-bright);
}

.experiments li strong {
    display: block;
    color: var(--text-accent-bright);
    font-size: var(--text-lg);
    margin-bottom: var(--space-xs);
}

/* Nested paragraphs in experiments list items (markdown rendering) */
.experiments li p {
    margin: 0;
    padding-left: 0;
    border-left: none;
    line-height: 1.8;
}

/* When strong is inside p (markdown rendering), keep it inline but styled */
.experiments li p strong {
    display: inline;
    margin-bottom: 0;
}

/* Regular ordered lists */
.explanation ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.explanation ol li {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

/* Unordered lists */
.explanation ul {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.explanation ul li {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

/* Code blocks */
.explanation pre {
    background-color: var(--bg-body);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    overflow-x: auto;
    margin: var(--space-lg) 0;
}

.explanation code {
    font-family: 'Courier New', monospace;
    color: #4a9eff;
    font-size: 1.1em;
}

.explanation pre code {
    display: block;
    color: #4a9eff;
}

@media (max-width: 1024px) {
    .explanation {
        padding: var(--space-lg);
    }

    .experiments li::before {
        position: static;
        margin-bottom: var(--space-sm);
    }
}
/* Navigation - Navbar, links, and dropdown menus */

/* Navigation Bar */
.navbar {
    background-color: var(--bg-navbar);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--border-primary);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

@media (max-width: 900px) {
    .nav-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 20px;
    }
}

.nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.nav-brand {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-brand:hover {
    color: var(--text-bright);
}

/* Hamburger Menu Button */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 20px;
    height: 14px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    opacity: 0.5;
    transition: opacity 0.2s;
}

@media (max-width: 900px) {
    .nav-hamburger {
        display: flex;
    }
}

.nav-hamburger:hover {
    opacity: 0.8;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--text-secondary);
    transition: all 0.3s ease;
    border-radius: 1px;
}

.nav-hamburger.active {
    opacity: 0.8;
}

.nav-hamburger.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.nav-links {
    display: grid;
    grid-template-columns: repeat(8, auto);
    grid-auto-flow: column;
    gap: 8px;
    column-gap: 12px;
    margin-left: auto;
}

@media (max-width: 900px) {
    .nav-links {
        grid-template-columns: repeat(4, auto);
        grid-template-rows: repeat(2, auto);
        margin-left: 0;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all 0.3s ease;
        margin-top: 0;
    }

    .nav-links.mobile-open {
        max-height: 500px;
        opacity: 1;
        margin-top: 16px;
    }
}

@media (max-width: 500px) {
    .nav-links {
        grid-template-columns: repeat(3, auto);
        grid-template-rows: repeat(3, auto);
    }
}

@media (max-width: 300px) {
    .nav-links {
        grid-template-columns: repeat(2, auto);
        grid-template-rows: repeat(4, auto);
    }
}

.nav-link-column {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

/* Split Button (Category link + Dropdown toggle) */
.nav-split-button {
    display: flex;
    align-items: center;
    gap: 0;
    border-radius: 4px;
    overflow: hidden;
}

.nav-split-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 2px 6px 0;
    transition: all 0.2s;
    font-size: 0.85em;
    line-height: 1.3;
    flex: 1;
}

.nav-split-link:hover {
    color: var(--text-bright);
}

.nav-split-button.active .nav-split-link {
    color: var(--text-accent-bright);
    font-weight: 600;
}

/* Legacy nav-link class (kept for compatibility) */
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 0;
    transition: all 0.2s;
    font-size: 0.85em;
    display: block;
    line-height: 1.3;
    cursor: pointer;
}

.nav-link:hover {
    color: var(--text-bright);
}

.nav-link.active {
    color: var(--text-accent-bright);
    font-weight: 600;
}

/* Dropdown Menu */
.nav-dropdown-toggle {
    color: var(--text-tertiary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: all 0.2s;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    user-select: none;
}

.nav-dropdown-toggle:hover {
    color: var(--text-primary);
    background-color: var(--bg-panel);
}

.nav-dropdown-toggle.active {
    color: var(--text-accent-bright);
    background-color: var(--bg-panel);
}

.nav-dropdown-toggle::after {
    content: "▼";
    font-size: 0.7em;
    transition: transform 0.2s;
}

.nav-dropdown-toggle.active::after {
    transform: rotate(180deg);
}

/* Toys Panel */
.nav-toys-panel-container {
    display: none;
}

.nav-toys-panel-container.open {
    display: block;
}

.nav-toys-panel {
    padding: 0;
}

.nav-toys-panel-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 16px 20px;
}

.nav-toys-panel-header {
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-back-button {
    color: var(--text-muted);
    font-size: 0.9em;
    cursor: pointer;
    margin-bottom: 8px;
    display: inline-block;
    transition: color 0.2s;
}

.nav-back-button:hover {
    color: var(--text-secondary);
}

.nav-toys-title-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.nav-toys-panel-title {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-toys-panel-title:hover {
    color: var(--text-bright);
}

.nav-toys-panel-more {
    font-size: 0.9em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-toys-panel-more:hover {
    color: var(--text-accent-bright);
}

.nav-toys-panel-subtitle {
    font-size: 0.95em;
    color: var(--text-disabled);
    margin-left: 8px;
}

.nav-toys-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    column-gap: 16px;
}

.nav-toys-column {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.nav-dropdown-item {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 0;
    transition: all 0.2s;
    font-size: 0.85em;
    display: block;
    line-height: 1.3;
}

.nav-dropdown-item:hover {
    color: var(--text-bright);
}

.nav-dropdown-item.active {
    color: var(--text-accent-bright);
    font-weight: 600;
}

.nav-dropdown-item.disabled {
    color: var(--text-disabled);
    cursor: not-allowed;
}

.nav-dropdown-item.disabled:hover {
    color: var(--text-disabled);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .nav-toys-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

/* Development Auth Toggle (only visible in development mode) */
.dev-auth-button {
    background: none;
    border: none;
    color: #888;
    padding: 0;
    cursor: pointer;
    font-size: inherit;
    transition: color 0.2s;
    white-space: nowrap;
}

.dev-auth-button:hover {
    color: #fff;
}
/* Buttons - Standard button styles and variants */

button {
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--bg-panel);
    color: var(--text-accent-bright);
    border: 2px solid var(--text-accent-dark);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    margin-right: var(--space-sm);
    transition: all 0.2s;
}

button:hover {
    background-color: var(--text-accent-muted);
    color: var(--bg-body);
    border-color: var(--text-accent-bright);
}

button:active {
    background-color: var(--text-accent-bright);
    color: var(--bg-body);
}

button:disabled {
    background-color: var(--interactive-disabled);
    color: var(--text-disabled);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Gate button variant (for quantum computing toys) */
.gate-btn {
    padding: var(--space-xs) var(--space-md);
    background-color: var(--border-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    margin: 4px;
    transition: all 0.2s;
    font-family: var(--font-mono);
}

.gate-btn:hover {
    background-color: var(--interactive-disabled);
    border-color: var(--text-secondary);
}

.gate-btn:active {
    background-color: var(--interactive-active);
}

/* Payment button variants */
.payment-button {
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--gradient-button-start) 0%, var(--gradient-button-end) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.payment-button:hover:not(:disabled) {
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 204, 255, 0.4);
}

.payment-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.payment-button-secondary {
    width: 100%;
    padding: var(--space-sm) var(--space-lg);
    background-color: var(--bg-section);
    color: var(--text-primary);
    border: 2px solid var(--border-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.payment-button-secondary:hover {
    background-color: var(--bg-panel);
    color: var(--text-primary);
    border-color: var(--border-subtle);
}
/* Forms - Input elements and form controls */

/* Checkboxes */
input[type="checkbox"] {
    margin-right: var(--space-xs);
    cursor: pointer;
    accent-color: var(--text-muted);
}

/* Range sliders */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    background: var(--slider-track);
    border-radius: 3px;
    outline: none;
    margin: var(--space-sm) 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--slider-thumb);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--slider-thumb-hover);
}

input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--slider-thumb);
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

input[type="range"]::-moz-range-thumb:hover {
    background: var(--slider-thumb-hover);
}

input[type="range"]::-moz-range-track {
    background: var(--slider-track);
    border-radius: 3px;
    height: 6px;
}

/* Email inputs */
.payment-email-form input[type="email"] {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--border-secondary);
    border-radius: var(--radius-md);
    font-size: 1em;
    background: var(--bg-section);
    color: #f9fafb;
    margin-bottom: var(--space-md);
    box-sizing: border-box;
}

.payment-email-form input[type="email"]:focus {
    outline: none;
    border-color: var(--text-muted);
}
/* Panels - Control groups, info panels, and sections */

/* Control groups - for sliders and inputs */
.control-group {
    background-color: var(--bg-panel);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
}

.control-group h3 {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-size: 1em;
}

.control-group label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--text-secondary);
    font-weight: 600;
}

.control-group input[type="range"] {
    width: 100%;
    margin-top: 5px;
}

.control-group span[id] {
    color: var(--text-accent-bright);
    font-weight: bold;
}

/* Info panels - for displaying information */
.info-panel {
    background-color: var(--bg-panel);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
}

.info-panel h3 {
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    font-size: 1em;
}

.info-panel ul {
    list-style-position: inside;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

.info-panel li {
    margin-bottom: 5px;
}

.info-panel p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
}

/* View sections - for multi-panel visualizations */
.view-section {
    background-color: var(--bg-explanation);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.view-section h3 {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: var(--text-xl);
}

.view-section canvas {
    width: 100%;
    background-color: var(--bg-canvas);
    border-radius: var(--radius-sm);
    display: block;
}

/* Event details */
#event-details {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-family: var(--font-mono);
}
/* Cards - Reusable stat cards and panels */

/* Base stat card - replaces .stat-box, .stat-item, .measurement, .twin-stat */
.stat-card {
    background-color: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

/* Stat card variants */
.stat-card--success {
    border-left: 4px solid var(--color-success);
}

.stat-card--error {
    border-left: 4px solid var(--color-error);
}

.stat-card--warning {
    border-left: 4px solid var(--color-warning);
}

.stat-card--neutral {
    border-left: 4px solid var(--text-secondary);
}

/* Stats grid - replaces all the panel grids */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.stats-grid--2-col {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Formula display boxes */
.formula-box {
    background-color: var(--bg-card-dark);
    padding: var(--space-lg);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    text-align: center;
}

/* Stat labels and values */
.stat-label {
    display: block;
    color: var(--text-muted);
    font-size: var(--text-xs);
    margin-bottom: var(--space-xs);
}

.stat-value {
    display: block;
    font-size: var(--text-3xl);
    font-weight: bold;
    font-family: var(--font-mono);
}

.stat-value--sm {
    font-size: var(--text-xl);
}

.stat-value--md {
    font-size: var(--text-2xl);
}

.stat-value--lg {
    font-size: var(--text-3xl);
}

.stat-value--xl {
    font-size: var(--text-4xl);
}

.stat-value--2xl {
    font-size: var(--text-5xl);
}

/* Stat value colors */
.stat-value--success {
    color: var(--color-success);
}

.stat-value--error {
    color: var(--color-error);
}

.stat-value--warning {
    color: var(--color-warning);
}

.stat-value--accent {
    color: var(--text-accent-bright);
}

/* Info boxes */
.info-box {
    background-color: var(--bg-card-dark);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    line-height: 1.8;
}

/* Timeline/section containers */
.timeline-container {
    margin-top: var(--space-2xl);
    padding: var(--space-lg);
    background-color: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
}
/* Premium - Locked feature styling and badges */

.premium-control {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed !important;
    position: relative;
}

.premium-control-group {
    opacity: 0.5;
    position: relative;
}

.premium-control-group label {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.premium-badge {
    display: inline-block;
    background: var(--bg-body);
    color: var(--accent-premium);
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.7em;
    font-weight: 600;
    margin-left: auto;
    cursor: pointer !important;
    transition:
        background 0.2s,
        color 0.2s;
    text-decoration: none;
    flex-shrink: 0;
    opacity: 1;
    pointer-events: auto;
}

.premium-badge:hover {
    background: #2a2a2a;
    color: var(--accent-premium-hover);
}
/* Modals - Payment modal and overlay */

.payment-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    padding: 20px;
    overflow-y: auto;
}

.payment-modal {
    background: var(--bg-body);
    border-radius: 12px;
    max-width: 600px;
    width: 100%;
    padding: 32px;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    color: #e5e7eb;
}

.payment-modal h2 {
    margin: 0 0 24px 0;
    font-size: 1.5em;
    color: #f9fafb;
    text-align: center;
}

.payment-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 2em;
    color: var(--text-gray);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
}

.payment-modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #f9fafb;
}

/* Pricing options */
.payment-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.payment-option {
    background: var(--bg-section);
    border: 2px solid var(--text-accent-dark);
    border-radius: 8px;
    padding: 24px 20px;
    text-align: center;
    position: relative;
    transition: all 0.2s;
    cursor: pointer;
}

.payment-option:hover {
    border-color: var(--text-accent-bright);
    background: var(--bg-panel);
}

.payment-option h3 {
    margin: 0 0 8px 0;
    font-size: 1.1em;
    color: var(--text-secondary);
}

.payment-price {
    font-size: 2em;
    font-weight: 700;
    margin: 8px 0;
    color: var(--text-accent-bright);
}

.payment-description {
    font-size: 0.85em;
    color: var(--text-gray);
    margin-bottom: 16px;
    line-height: 1.4;
}

/* Email form */
.payment-email-form h3 {
    margin: 0 0 8px 0;
    font-size: 1.25em;
    color: #f9fafb;
}

.payment-email-form p {
    margin: 0 0 16px 0;
    color: var(--text-gray);
    font-size: 0.9em;
}

.payment-form-buttons {
    display: flex;
    gap: 12px;
}

.payment-form-buttons button {
    flex: 1;
}

/* Footer */
.payment-footer {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border-secondary);
    text-align: center;
    font-size: 0.9em;
    color: var(--text-gray);
}

.payment-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
}

.payment-footer a:hover {
    text-decoration: underline;
}

.payment-security {
    margin-top: 12px;
    font-size: 0.85em;
    color: var(--text-subtle);
}

/* Responsive */
@media (max-width: 600px) {
    .payment-options {
        grid-template-columns: 1fr;
    }

    .payment-modal {
        padding: 24px 20px;
    }

    .payment-form-buttons {
        flex-direction: column;
    }

    .payment-price {
        font-size: 2em;
    }
}
/* Category Index Pages */

.category-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.category-header {
    margin-bottom: 48px;
    text-align: center;
}

.category-header h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: var(--text-bright);
}

.category-description {
    font-size: 1.25em;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto;
}

/* Toy Groups */
.toy-group {
    margin-bottom: 80px;
}

.toy-group h2 {
    font-size: 2.2em;
    margin-bottom: 20px;
    margin-top: 48px;
    color: var(--text-accent-bright);
    text-align: center;
}

.toy-group:first-of-type h2 {
    margin-top: 0;
}

.toy-group-description {
    font-size: 1.15em;
    line-height: 1.7;
    color: var(--text-muted);
    text-align: center;
    max-width: 750px;
    margin: 0 auto 40px;
}

.toy-previews {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* Center last card if odd number of cards (desktop only) */
.toy-previews > .toy-preview-card:last-child:nth-child(odd) {
    grid-column: 1 / -1;
    max-width: calc(50% - 12px);
    margin: 0 auto;
}

@media (max-width: 768px) {
    .toy-previews > .toy-preview-card:last-child:nth-child(odd) {
        max-width: none;
        margin: 0;
    }
}

/* Toy Preview Cards */
.toy-preview-card {
    display: flex;
    gap: 16px;
    padding: 16px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s;
    align-items: flex-start;
}

.toy-preview-card:hover {
    background-color: var(--bg-panel-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.toy-preview-image {
    flex-shrink: 0;
    width: 120px;
    height: 90px;
    border-radius: 4px;
    overflow: hidden;
    background-color: var(--bg-canvas);
}

.toy-preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.toy-preview-content {
    flex: 1;
    min-width: 0;
}

.toy-preview-title {
    font-size: 1.1em;
    font-weight: 600;
    color: var(--text-bright);
    margin-bottom: 8px;
    line-height: 1.3;
}

.toy-preview-description {
    font-size: 1em;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .category-header h1 {
        font-size: 2em;
    }

    .category-description {
        font-size: 1em;
    }

    .toy-previews {
        grid-template-columns: 1fr;
    }

    .toy-preview-card {
        flex-direction: column;
    }

    .toy-preview-image {
        width: 100%;
        height: auto;
    }

    .toy-preview-image img {
        object-fit: contain;
    }
}

@media (max-width: 480px) {
    .category-page {
        padding: 24px 16px;
    }

    .category-header {
        margin-bottom: 32px;
    }

    .toy-group {
        margin-bottom: 32px;
    }
}
/* Landing Page (Homepage) */

.landing-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.landing-header {
    margin-bottom: 60px;
    text-align: center;
}

.landing-header h1 {
    font-size: 3em;
    margin-bottom: 20px;
    color: var(--text-bright);
}

.landing-intro {
    font-size: 1.25em;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto;
}

/* Two Column Layout */
.landing-columns {
    display: flex;
    gap: 48px;
    margin-bottom: 60px;
}

.landing-column {
    flex: 1;
}

.landing-column h2 {
    font-size: 2.2em;
    margin-bottom: 20px;
    color: var(--text-accent-bright);
    text-align: left; /* Not centered, unlike category pages */
}

.landing-column p {
    font-size: 1.15em;
    line-height: 1.7;
    color: var(--text-muted);
    text-align: left; /* Not centered, unlike category pages */
}

/* Category Cards */
.landing-categories {
    margin-top: 60px;
    margin-bottom: 60px;
}

.category-card {
    position: relative;
    display: grid;
    grid-template-columns: 280px 1fr 240px;
    gap: 32px;
    padding: 32px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    margin-bottom: 24px;
    transition: all 0.2s;
}

.category-card:hover {
    background-color: var(--bg-panel-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.category-card-image {
    width: 100%;
    border-radius: 4px;
    overflow: hidden;
    background-color: var(--bg-canvas);
}

.category-card-image img {
    width: 100%;
    height: auto;
    display: block;
}

.category-card-content h3 {
    font-size: 2em;
    margin-bottom: 16px;
    margin-top: 0;
}

.category-card-content h3 a {
    color: var(--text-accent-bright);
    text-decoration: none;
}

/* Stretched link - makes the category link cover the entire card */
.category-card-link::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
}

.category-card-description {
    font-size: 1.1em;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.category-card-examples h4 {
    font-size: 1.1em;
    margin-top: 0;
    margin-bottom: 12px;
    color: var(--text-accent-bright);
}

.category-card-examples ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-card-examples li {
    font-size: 0.95em;
    padding: 6px 0;
    border-bottom: 1px solid var(--border-primary);
}

.category-card-examples li:last-child {
    border-bottom: none;
}

.category-card-examples li a {
    position: relative;
    z-index: 2;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.category-card-examples li a:hover {
    color: var(--text-accent-bright);
}

/* Disclaimer Section */
.landing-disclaimer {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px;
    background-color: var(--bg-panel);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    text-align: center;
}

.landing-disclaimer p {
    font-size: 1em;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.landing-disclaimer a {
    color: var(--text-accent-bright);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.landing-disclaimer a:hover {
    border-bottom-color: var(--text-accent-bright);
}

/* Mobile Layout */
@media (max-width: 768px) {
    .landing-header h1 {
        font-size: 2em;
    }

    .landing-intro {
        font-size: 1em;
    }

    .landing-columns {
        flex-direction: column;
        gap: 40px;
    }

    .landing-column h2 {
        font-size: 1.8em;
    }

    .landing-column p {
        font-size: 1em;
    }

    .category-card {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 24px;
    }

    .category-card-image {
        max-width: 400px;
        margin: 0 auto;
    }

    .category-card-content h3 {
        font-size: 1.6em;
        text-align: center;
    }

    .category-card-description {
        text-align: center;
    }

    .category-card-examples h4 {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .landing-page {
        padding: 24px 16px;
    }

    .landing-header {
        margin-bottom: 40px;
    }

    .landing-columns {
        margin-bottom: 40px;
    }

    .landing-disclaimer {
        padding: 16px;
    }
}
/* Causality sandbox specific styles */

/* Canvas sizing */
#causality-canvas {
    width: 100%;
    height: 600px;
    display: block;
    margin-bottom: var(--space-md);
    cursor: crosshair;
}

/* Inline controls layout */
.controls-inline {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.controls-inline button {
    flex: 1;
    min-width: 140px;
    margin: 0;
}

/* Event info panel */
.event-info-panel {
    background-color: var(--bg-card);
    border: 2px solid var(--text-secondary);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    font-weight: bold;
}

/* Velocity status indicator */
.velocity-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background-color: var(--bg-card-dark);
    border-radius: var(--radius-sm);
    margin-top: var(--space-sm);
}

.status-indicator {
    font-size: var(--text-xl);
    font-weight: bold;
}

.status-indicator.valid {
    color: var(--color-success);
}

.status-indicator.invalid {
    color: var(--color-error);
}

/* Causal info panel override */
.causal-info {
    background-color: var(--bg-card) !important;
}

/* Causal analysis text */
#causal-analysis {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    line-height: 1.8;
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #causality-canvas {
        height: 400px;
    }

    .controls-inline {
        flex-direction: column;
    }

    .controls-inline button {
        width: 100%;
    }
}
/* Hardy-Weinberg specific styles - all common styling now in toy.css */

/* This file is intentionally minimal - toy.css provides all the base styling */
/* Length contraction specific styles */

.visualization-container h3 {
    margin-bottom: var(--space-sm);
    margin-top: var(--space-lg);
}

.visualization-container h3:first-child {
    margin-top: 0;
}

/* Canvas sizing */
#rest-canvas, #moving-canvas {
    width: 100%;
    height: 180px;
    display: block;
    margin-bottom: var(--space-md);
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #rest-canvas, #moving-canvas {
        height: 150px;
    }
}
/* Muon decay specific styles */

/* Canvas sizing */
#muon-canvas {
    width: 100%;
    height: 500px;
    background-color: var(--bg-canvas);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    display: block;
    margin-bottom: var(--space-lg);
}

/* Stat card color variants - extend shared classes */
.stat-card.classical {
    border-top: 4px solid var(--color-error);
}

.stat-card.relativistic {
    border-top: 4px solid var(--color-success);
}

.stat-card.difference {
    border-top: 4px solid var(--highlight-yellow);
}

.stat-card h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    font-size: var(--text-lg);
}

/* Stat value color variants */
.stat-card.classical .stat-value {
    color: var(--color-error);
}

.stat-card.relativistic .stat-value {
    color: var(--color-success);
}

.stat-value.highlight {
    color: var(--highlight-yellow);
}

/* Survival rate display */
.survival-rate {
    font-size: var(--text-xl);
    font-weight: bold;
    margin-top: var(--space-sm);
}

.stat-card.classical .survival-rate span {
    color: var(--color-error);
}

.stat-card.relativistic .survival-rate span {
    color: var(--color-success);
}

/* Explanation text */
.explanation-text {
    color: var(--text-muted);
    font-size: var(--text-sm);
    margin-top: var(--space-sm);
    font-style: italic;
}

/* Constant displays - using info-box with custom styling */
.constant-display {
    background-color: var(--bg-card-dark);
    padding: var(--space-sm);
    margin: var(--space-xs) 0;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
}

.constant-display span {
    color: var(--highlight-yellow);
}

/* Calculation text */
.calculation-text {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    line-height: 1.8;
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #muon-canvas {
        height: 350px;
    }

    .stat-value--2xl {
        font-size: var(--text-3xl);
    }
}
/* Rindler coordinates specific styles */

/* Canvas sizing */
#rindler-canvas {
    width: 100%;
    height: 600px;
    display: block;
    margin-bottom: var(--space-lg);
}

/* Formula display - custom size for this toy */
.formula-display {
    background-color: var(--bg-card-dark);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.95em;
    line-height: 1.8;
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #rindler-canvas {
        height: 400px;
    }
}
/* Train-specific styles */

/* Visualization container spacing override */
.visualization-container {
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

/* Frame info boxes - extends info-box */
.frame-info {
    margin-top: var(--space-md);
    padding: var(--space-sm);
    background-color: var(--bg-card-dark);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
}

/* Timeline container - extends shared .timeline-container */
.timeline-container h3 {
    margin-bottom: var(--space-md);
}

/* Spacetime diagram canvas */
#spacetime-canvas {
    width: 100%;
    height: 400px;
    background-color: var(--bg-canvas);
    border-radius: var(--radius-sm);
}

/* Timing details */
#timing-details {
    line-height: 1.8;
}

/* View section canvas sizing */
.view-section canvas {
    height: 200px;
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    .view-section canvas {
        height: 150px;
    }

    #spacetime-canvas {
        height: 300px;
    }
}
/* Twin Paradox specific styles */

/* Visualization container spacing */
.visualization-container {
    margin-bottom: var(--space-xl);
}

/* Worldline canvas sizing */
#worldline-canvas {
    width: 100%;
    height: 600px;
    display: block;
    margin-bottom: var(--space-lg);
}

/* Twin stat card color variants - extend shared stat-card */
.stat-card.stay-home {
    border-left: 4px solid var(--color-error);
}

.stat-card.traveling {
    border-left: 4px solid var(--text-secondary);
}

.stat-card h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    font-size: var(--text-lg);
}

/* Stat value layout override for twins (horizontal flex layout) */
.stat-card .stat-value {
    display: flex;
    align-items: baseline;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

/* Stat number - large monospace number */
.stat-number {
    font-size: var(--text-3xl);
    font-weight: bold;
    font-family: var(--font-mono);
}

/* Stat unit */
.stat-unit {
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

/* Stat detail - italicized detail text */
.stat-detail {
    color: var(--text-muted);
    font-size: var(--text-xs);
    font-style: italic;
}

/* Age difference highlight box */
.age-difference {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--bg-card-dark) 0%, #2a2a2a 100%);
    border: 2px solid var(--text-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
}

.age-difference strong {
    color: var(--text-primary);
    font-size: var(--text-lg);
    display: block;
    margin-bottom: var(--space-sm);
}

.age-difference .highlight {
    color: var(--highlight-yellow);
    font-size: var(--text-4xl);
    font-weight: bold;
    font-family: var(--font-mono);
    display: block;
    margin: var(--space-sm) 0;
}

.age-explanation {
    font-size: var(--text-lg);
    margin-top: var(--space-sm);
}

/* Journey details panel */
.journey-details {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
}

#journey-info {
    line-height: 1.8;
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #worldline-canvas {
        height: 400px;
    }

    .age-difference {
        grid-column: 1;
    }
}
/* Velocity Addition specific styles */

/* Canvas sizing */
#velocity-canvas {
    width: 100%;
    height: 400px;
    display: block;
    margin-bottom: var(--space-lg);
}

/* Result panel - uses stat-card base with custom content */
.result-panel {
    background-color: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
}

/* Velocity display - custom layout */
.velocity-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.velocity-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.velocity-label {
    color: var(--text-muted);
    font-size: var(--text-sm);
}

.velocity-value {
    font-size: var(--text-4xl);
    font-weight: bold;
    font-family: var(--font-mono);
}

.velocity-item.result .velocity-value {
    color: var(--color-success);
    font-size: var(--text-5xl);
}

.velocity-operator {
    font-size: var(--text-3xl);
    color: var(--text-dim);
    font-weight: bold;
}

/* Comparison grid */
.comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-primary);
}

.comparison-item {
    text-align: center;
}

.comparison-item strong {
    display: block;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
    font-size: var(--text-sm);
}

.comparison-item span {
    font-size: var(--text-2xl);
    font-weight: bold;
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

.comparison-item.classical span {
    color: var(--color-error);
}

.error-badge {
    display: inline-block;
    background-color: var(--color-error);
    color: var(--bg-canvas);
    padding: 2px var(--space-xs);
    border-radius: 3px;
    font-size: 0.6em !important;
    font-weight: bold;
    margin-left: var(--space-xs);
    vertical-align: middle;
}

/* Rapidity panel */
.rapidity-panel {
    background-color: var(--bg-card);
    border: 2px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.rapidity-panel h3 {
    margin-bottom: var(--space-md);
    font-size: var(--text-lg);
}

.rapidity-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.rapidity-item {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.rapidity-item .label {
    color: var(--text-muted);
    font-size: var(--text-sm);
}

.rapidity-item .value {
    font-size: 1.3em;
    font-weight: bold;
    font-family: var(--font-mono);
    color: var(--highlight-yellow);
}

.rapidity-item .operator,
.rapidity-display > .operator {
    font-size: var(--text-2xl);
    color: var(--text-dim);
    font-weight: bold;
}

.rapidity-note {
    font-size: var(--text-xs);
    font-style: italic;
    text-align: center;
}

/* Fraction display */
.frac {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    vertical-align: middle;
    margin: 0 5px;
}

.frac .num {
    border-bottom: 2px solid var(--text-secondary);
    padding: 0 var(--space-xs) 2px var(--space-xs);
}

.frac .den {
    padding: 2px var(--space-xs) 0 var(--space-xs);
}

/* Button overrides for controls sidebar */
.controls button {
    width: 100%;
    margin-bottom: var(--space-sm);
    margin-right: 0;
}

@media (max-width: 1024px) {
    #velocity-canvas {
        height: 300px;
    }

    .velocity-value {
        font-size: 1.8em;
    }

    .velocity-item.result .velocity-value {
        font-size: 2.2em;
    }

    .comparison {
        grid-template-columns: 1fr;
    }
}
/*
 * Theory.toys CSS Manifest
 *
 * This manifest file imports all stylesheets in the correct order using Sprockets directives.
 * CSS precedence follows the standard cascading order - styles declared later will override
 * earlier ones, depending on specificity.
 *
 * Structure:
 * 1. Base - Foundational styles (reset, colors, typography)
 * 2. Layout - Page structure and grids
 * 3. Components - Reusable UI components
 * 4. Toys - Toy-specific overrides
 *




 *




 *







 *



 */