/* Modern CSS Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow: hidden;
    touch-action: none;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    overflow-wrap: break-word;
}

/* Accessibility */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    width: 50px;
    height: 50px;
    z-index: 1000;
    transition: transform var(--transition-fast);
}

.dark-mode-toggle:hover {
    transform: scale(1.1);
}

.dark-mode-toggle:active {
    transform: scale(0.95);
}

.dark-mode-toggle img {
    width: 100%;
    height: 100%;
    display: block;
}

.dark-mode-toggle:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: 50%;
}

@media (max-width: 768px) {
    .dark-mode-toggle {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
}

/* CSS Custom Properties */
:root {
    --mobile: 320px;
    --tablet: 768px;
    --desktop: 1024px;
    --large-desktop: 1440px;
    
    --color-primary: #2c3e50;
    --color-secondary: #34495e;
    --color-accent: #3498db;
    --color-text: #333;
    --color-text-light: #666;
    --color-background: #fff;
    --color-background-light: #f8f9fa;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-hover: rgba(0, 0, 0, 0.15);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    
    --border-radius-sm: 6px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode Variables */
/* All new elements (home-position-content, triangle-layout, statement-box, core-box, bias-gallery, bias-gallery-item, bias-title) 
   automatically inherit dark mode styling through CSS custom properties defined below */
[data-theme="dark"] {
    --color-primary: #e8eaed;
    --color-secondary: #bdc1c6;
    --color-accent: #5dade2;
    --color-text: #e8eaed;
    --color-text-light: #9aa0a6;
    --color-background: #1a1a1a;
    --color-background-light: #2a2a2a;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.4);
}

/* Base Styles */
header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-secondary);
    font-weight: 400;
    margin-top: var(--spacing-sm);
    line-height: 1.4;
}

h1 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

p {
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

/* Mobile First Responsive Design */

/* Base mobile styles (320px and up) - already defined above */

/* Tablet styles (768px and up) */
@media (min-width: 768px) {
    h1 {
        font-size: 3.5rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .subtitle {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-lg);
    }
    
    h2 {
        font-size: var(--font-size-3xl);
    }
}

/* Desktop styles (1024px and up) */
@media (min-width: 1024px) {
    h1 {
        font-size: 4rem;
        margin-bottom: var(--spacing-xl);
    }
}

/* Large desktop styles (1440px and up) */
@media (min-width: 1440px) {
    h1 {
        font-size: 4.5rem;
    }
}

/* Focus and Accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Skip to content link for keyboard navigation */
.skip-link {
    position: fixed;
    top: -100px;
    left: 10px;
    z-index: 2000;
    background: var(--color-primary);
    color: white;
    padding: 12px 20px;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: var(--font-size-base);
    box-shadow: 0 4px 8px var(--color-shadow);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 10px;
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

/* Print Styles */
@media print {
    a {
        color: #000;
        text-decoration: underline;
    }
    
    a[href]:after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }
}
/* World Canvas Styles */

/* 2.1 World canvas base styles */
.world-canvas {
    width: 40000px;
    height: 40000px;
    position: relative;
    cursor: grab;
    background-color: var(--color-background);
    background-image: 
        linear-gradient(var(--color-text-light) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-text-light) 1px, transparent 1px);
    background-size: 50px 50px;
    background-position: 0 0;
    opacity: 0;
    /* Start hidden at origin; JS will position correctly then reveal via .world-canvas-ready */
    transition: transform 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
    will-change: transform;
    touch-action: none;
}

.world-canvas-ready {
    opacity: 1;
}

.world-canvas.dragging {
    cursor: grabbing;
    transition: none;
}

/* Adjust grid opacity for visible appearance */
[data-theme="light"] .world-canvas {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.15) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.15) 1px, transparent 1px);
}

[data-theme="dark"] .world-canvas {
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
}

/* Home Position Content Styles */
.home-position-content {
    position: absolute;
    top: 20000px;
    left: 20000px;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    width: 90%;
    max-width: 1200px;
}

/* Page Title Styles */
.page-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

@media (min-width: 768px) {
    .page-title {
        font-size: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .page-title {
        font-size: 4rem;
    }
}

/* Header Block Styles */
.header-block {
    position: relative;
    overflow: hidden;
    background-color: var(--color-background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 2px solid #808080;
    border-bottom: none;
    box-shadow: 0 2px 4px var(--color-shadow);
    font-size: calc(var(--font-size-base) * 1.5);
    font-weight: 500;
    line-height: 1.6;
    text-align: center;
    cursor: pointer;
    width: 90%;
    max-width: 700px;
}

.header-block:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

[data-theme="dark"] .header-block {
    border-color: #ffffff;
}

.header-block .progress-bar {
    background-color: #808080;
    height: 2px;
}

[data-theme="dark"] .header-block .progress-bar {
    background-color: #ffffff;
}

/* Triangle Layout Styles */
.triangle-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--spacing-lg);
    max-width: 1200px;
    justify-items: center;
    width: 100%;
}

.liberal-box {
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
}

.conservative-box {
    grid-column: 2;
    grid-row: 1;
    justify-self: start;
}

.core-box {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-self: center;
}

/* Statement Box Styles */
.statement-box {
    position: relative;
    overflow: hidden;
    background-color: var(--color-background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 2px 4px var(--color-shadow);
    font-size: calc(var(--font-size-base) * 1.5);
    font-weight: 500;
    line-height: 1.6;
    width: fit-content;
    max-width: 500px;
    min-width: 300px;
}

.liberal-box {
    border-left-color: #2980b9;
}

.conservative-box {
    border-left-color: #e74c3c;
}

/* Core Message Box Styles */
.core-box {
    position: relative;
    overflow: hidden;
    background-color: var(--color-background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 2px solid #808080;
    border-bottom: none;
    box-shadow: 0 2px 4px var(--color-shadow);
    font-size: calc(var(--font-size-base) * 1.5);
    font-weight: 500;
    line-height: 1.6;
    text-align: center;
    width: fit-content;
    max-width: 700px;
    min-width: 400px;
}

/* Dark mode border for core box */
[data-theme="dark"] .core-box {
    border-color: #ffffff; /* White border for dark mode */
}

/* Progress Bar Styles */
.progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 4px;
    border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
    pointer-events: none;
    z-index: 1;
}

.liberal-box .progress-bar {
    background-color: #2980b9;
}

.conservative-box .progress-bar {
    background-color: #e74c3c;
}

.core-box .progress-bar {
    background-color: #808080;
    height: 2px;
}

[data-theme="dark"] .core-box .progress-bar {
    background-color: #ffffff;
}

/* Bias Gallery Styles */
.bias-gallery {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    max-width: 100%;
    width: 100%;
}

/* Bias Gallery Item Styles */
.bias-gallery-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    transition: transform var(--transition-fast);
    border-radius: var(--border-radius-sm);
    padding: 0;
}

.bias-gallery-item:hover {
    transform: scale(1.05);
}

.bias-gallery-item:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
    transform: scale(1.05);
}

.bias-gallery-item:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

.bias-gallery-item img {
    width: 100%;
    max-width: 350px;
    height: auto;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 2px 4px var(--color-shadow);
}

.bias-title {
    font-size: var(--font-size-xl);
    text-align: center;
    max-width: 350px;
    font-weight: 500;
    color: var(--color-text);
}

/* Bias Gallery Placeholder Styles */
.bias-gallery-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.4;
}

.bias-gallery-placeholder img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
}

/* Mobile breakpoint styles (< 768px) */
@media (max-width: 767px) {
    /* Stack text boxes vertically using flexbox */
    .triangle-layout {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    /* Adjust text box sizing for mobile */
    .statement-box,
    .core-box {
        width: 90vw;
        max-width: none;
        min-width: 0;
    }
    
    /* Adjust image max-width for mobile (350px) */
    .bias-gallery-item img {
        max-width: 350px;
    }
    
    .bias-title {
        max-width: 350px;
    }
    
    /* Hide placeholders on mobile */
    .bias-gallery-placeholder {
        display: none;
    }
}

/* Bias gallery 3×3 grid for tablet and desktop (≥ 768px) */
@media (min-width: 768px) {
    .bias-gallery {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        grid-template-rows: repeat(3, auto);
        gap: var(--spacing-xs);
        justify-items: center;
    }
}

/* Tablet breakpoint styles (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    /* Maintain triangle layout for text boxes */
    .triangle-layout {
        max-width: 900px;
    }
    
    /* Adjust box max-widths for tablet screens */
    .statement-box {
        max-width: 400px;
        min-width: 250px;
    }
    
    .core-box {
        /* Width = (2 statement boxes + gap) * 0.8 for 20% reduction */
        /* (400px + 400px + var(--spacing-lg)) * 0.8 */
        width: calc((800px + var(--spacing-lg)) * 0.8);
        max-width: calc((800px + var(--spacing-lg)) * 0.8);
        min-width: calc((500px + var(--spacing-lg)) * 0.8);
    }
    
    /* Set image max-width for tablet (300px) */
    .bias-gallery-item img {
        max-width: 300px;
    }
    
    .bias-title {
        max-width: 300px;
    }
}

/* Desktop breakpoint styles (≥ 1024px) */
@media (min-width: 1024px) {
    /* Maintain triangle layout for text boxes */
    .triangle-layout {
        max-width: 1200px;
    }
    
    .statement-box {
        max-width: 500px;
        min-width: 300px;
    }
    
    .core-box {
        /* Width = (2 statement boxes + gap) * 0.8 for 20% reduction */
        /* (500px + 500px + var(--spacing-lg)) * 0.8 */
        width: calc((1000px + var(--spacing-lg)) * 0.8);
        max-width: calc((1000px + var(--spacing-lg)) * 0.8);
        min-width: calc((600px + var(--spacing-lg)) * 0.8);
    }
    
    /* Set image max-width for desktop (300px) */
    .bias-gallery-item img {
        max-width: 300px;
    }
    
    .bias-title {
        max-width: 300px;
    }
}

/* 2.3 Corner label styles */
.corner-label {
    position: absolute;
    font-family: 'Courier New', Courier, monospace;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    opacity: 0.6;
    pointer-events: none;
    user-select: none;
    padding: var(--spacing-sm);
    background-color: var(--color-background);
    border-radius: var(--border-radius-sm);
}

.corner-top-left {
    top: 20px;
    left: 20px;
}

.corner-top-right {
    top: 20px;
    right: 20px;
}

.corner-bottom-left {
    bottom: 20px;
    left: 20px;
}

.corner-bottom-right {
    bottom: 20px;
    right: 20px;
}

/* 2.4 Home button styles */
.home-button {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    padding: 10px 24px;
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-size-base);
    box-shadow: 0 2px 4px var(--color-shadow);
    transition: all var(--transition-fast);
    opacity: 0;
    pointer-events: none;
}

.home-button:hover {
    transform: translateX(-50%) scale(1.05);
    box-shadow: 0 4px 8px var(--color-shadow-hover);
    background: var(--color-primary);
}

.home-button:active {
    transform: translateX(-50%) scale(0.95);
}

.home-button:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.home-button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.home-button.hidden {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
}

.home-button.visible {
    opacity: 1;
    pointer-events: auto;
    transition: opacity var(--transition-normal);
}

/* Responsive adjustments for Home button */
@media (max-width: 768px) {
    .home-button {
        top: 10px;
        padding: 8px 20px;
        font-size: var(--font-size-sm);
    }
}

/* 2.5 Copyright footer styles */
.copyright-footer {
    position: fixed;
    bottom: 10px;
    right: 20px;
    z-index: 1000;
    padding: 8px 16px;
    background: var(--color-background);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    opacity: 0.6;
    pointer-events: none;
    user-select: none;
    transition: opacity var(--transition-fast);
}

.copyright-footer:hover {
    opacity: 0.8;
}

/* Hide copyright footer on mobile */
@media (max-width: 768px) {
    .copyright-footer {
        display: none;
    }
}

/* Bias Block Styles */
.bias-block {
    position: absolute;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 800px;
    background-color: var(--color-background-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: 0 2px 4px var(--color-shadow);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.bias-block:hover {
    transform: translate(-50%, -50%) translateY(-2px);
    box-shadow: 0 6px 12px var(--color-shadow-hover);
}

.bias-block:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

.bias-block:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
}

.bias-block h2 {
    width: 100%;
    margin-bottom: var(--spacing-md);
}

/* Two-column layout */
.bias-block-content {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.bias-block-description {
    flex: 1;
    min-width: 0;
}

.bias-block-image {
    flex: 0 0 40%;
    min-width: 0;
}

.bias-block-image img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    box-shadow: 0 4px 6px var(--color-shadow);
}

/* Links section */
.bias-block-links {
    text-align: center;
    padding-top: var(--spacing-sm);
}

.bias-block-links a {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid var(--color-accent);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
    font-size: var(--font-size-base);
    margin: var(--spacing-xs);
}

.bias-block-links a:hover,
.bias-block-links a:focus {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--color-shadow-hover);
}

/* Responsive: stack columns vertically below 1024px */
@media (max-width: 1023px) {
    .bias-block-content {
        flex-direction: column;
    }

    .bias-block-image {
        flex: none;
        width: 100%;
    }
}

/* Image Lightbox Overlay */
.image-lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-lightbox-overlay[hidden] {
    display: none;
}

.image-lightbox-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: #fff;
    font-size: var(--font-size-4xl);
    cursor: pointer;
    line-height: 1;
    padding: var(--spacing-xs);
    transition: transform var(--transition-fast);
}

.image-lightbox-close:hover {
    transform: scale(1.2);
}

.image-lightbox-close:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.image-lightbox-container {
    max-width: 90vw;
    max-height: 90vh;
}

.image-lightbox-container img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--border-radius-md);
}

/* Clickable image hint on bias blocks */
.bias-block-lightbox-trigger:hover img {
    box-shadow: 0 6px 16px var(--color-shadow-hover);
}

.bias-block-lightbox-trigger:focus {
    outline: 3px solid var(--color-accent);
    outline-offset: 4px;
    border-radius: var(--border-radius-md);
}

/* Mobile-specific overrides for canvas interaction fix */
@media (max-width: 768px) {
    .bias-block {
        width: 90%;
        max-width: 600px;
    }

    .bias-block-image img {
        max-height: 300px;
        object-fit: contain;
    }

    .home-position-content {
        width: 90%;
        max-width: 600px;
    }

    .header-block {
        font-size: calc(var(--font-size-base) * 1.5);
        padding: var(--spacing-sm);
        width: 85vw;
        max-width: 600px;
    }
}