/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette - minimalist with good contrast ratios */
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #4a4a4a;
    --color-accent: #2d5a8c;
    --color-accent-hover: #1f3d5e;
    --color-border: #e0e0e0;
    --color-bg-subtle: #f8f9fa;
    --color-highlight: #f0f4f8;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Layout */
    --max-width: 1400px;
    --border-radius: 4px;
}

/* Base Typography */
html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* Header */
header {
    background-color: var(--color-bg-subtle);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
}

header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

header .job-title {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

header a {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-accent);
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease, color 0.2s ease;
}

header a:hover,
header a:focus {
    background-color: var(--color-accent);
    color: white;
    outline: 2px solid var(--color-accent-hover);
    outline-offset: 2px;
}

/* Main Container */
main {
    padding: var(--spacing-xl) var(--spacing-md);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .container {
        grid-template-columns: 1.5fr 1fr;
    }
}

/* Left Column: Requirements Section */
.requirements-section {
    overflow-y: auto;
    max-height: calc(100vh - 300px);
    padding-right: var(--spacing-sm);
}

.requirements-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    padding: var(--spacing-sm) 0;
    z-index: 10;
}

.qa-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-highlight);
    border-left: 3px solid var(--color-accent);
    border-radius: var(--border-radius);
    transition: box-shadow 0.2s ease;
}

.qa-item:hover,
.qa-item:focus-within {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.qa-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.qa-item .answer {
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.qa-item .answer p {
    margin-bottom: var(--spacing-sm);
}

.qa-item .answer p:last-child {
    margin-bottom: 0;
}

/* Right Column: About Section */
.about-section {
    position: sticky;
    top: var(--spacing-md);
    align-self: start;
    background-color: var(--color-bg-subtle);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.about-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: var(--spacing-sm);
}

.about-content {
    margin-bottom: var(--spacing-lg);
}

.about-content:last-child {
    margin-bottom: 0;
}

.about-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.about-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.about-content p:last-child {
    margin-bottom: 0;
}

/* Address styling */
address {
    font-style: normal;
}

address p {
    margin-bottom: var(--spacing-xs);
}

/* Links */
a {
    color: var(--color-accent);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

a:hover,
a:focus {
    color: var(--color-accent-hover);
    text-decoration-thickness: 2px;
}

a:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Lists */
ul {
    list-style-position: inside;
    color: var(--color-text-secondary);
}

ul li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-sm);
}

ul li:last-child {
    margin-bottom: 0;
}

ul li strong {
    color: var(--color-text);
}

/* Footer */
footer {
    background-color: var(--color-bg-subtle);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xl);
}

footer p {
    margin-bottom: var(--spacing-xs);
}

footer p:last-child {
    margin-bottom: 0;
}

/* Scrollbar styling for webkit browsers */
.requirements-section::-webkit-scrollbar {
    width: 8px;
}

.requirements-section::-webkit-scrollbar-track {
    background: var(--color-bg-subtle);
    border-radius: var(--border-radius);
}

.requirements-section::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--border-radius);
}

.requirements-section::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

/* Responsive adjustments */
@media (max-width: 767px) {
    :root {
        --font-size-base: 15px;
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    header .job-title {
        font-size: 1rem;
    }
    
    .requirements-section,
    .about-section {
        position: static;
        max-height: none;
    }
    
    .requirements-section h2,
    .about-section h2 {
        font-size: 1.5rem;
    }
    
    main {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

/* Print styles */
@media print {
    header,
    footer {
        background-color: transparent;
    }
    
    .requirements-section {
        max-height: none;
        overflow: visible;
    }
    
    .about-section {
        position: static;
    }
    
    a {
        color: var(--color-text);
        text-decoration: none;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 0.875rem;
        color: var(--color-text-secondary);
    }
}

/* Focus visible for better keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-bg: #ffffff;
        --color-text: #000000;
        --color-accent: #0000ff;
        --color-border: #000000;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms;
        animation-iteration-count: 1;
        transition-duration: 0.01ms;
        scroll-behavior: auto;
    }
}