:root {
    /* CircuitryLabs Terminal Design System - Light Theme Only */
    --color-bg: #FAFBFC;
    --color-bg-alt: #F6F8FA;
    --color-bg-tertiary: #FFFFFF;
    --color-text: #1A1D23;
    --color-text-secondary: #57606A;
    --color-text-muted: #8B949E;
    --color-accent: #0969DA;
    --color-accent-hover: #0860CA;
    --color-border: #D8DEE4;
    --color-border-muted: #F3F4F6;
    
    /* Thermal Indicators */
    --color-thermal-cool: #1A7F37;
    --color-thermal-warm: #BF8700;
    --color-thermal-hot: #CF222E;
    
    /* Typography */
    --font-mono: 'Courier New', Courier, monospace;
    --font-size-base: 14px;
    --line-height: 1.5;
    
    /* Spacing Scale */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border */
    --border-width: 1px;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: var(--line-height);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    background: var(--color-bg);
}

.site-title {
    font-size: 2rem;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-text);
    letter-spacing: 0.02em;
    font-weight: 400;
    text-transform: uppercase;
}

.site-tagline {
    font-size: 0.875rem;
    margin: 0;
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: 0.1em;
}

main {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.search-section {
    margin-bottom: var(--spacing-lg);
}

.search-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.search-title {
    font-size: 1.5rem;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-text);
    font-weight: 400;
    letter-spacing: 0.02em;
}

.ascii-arrow {
    color: var(--color-accent);
}

.search-subtitle {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin: 0;
    font-weight: 400;
}

.search-form {
    margin-bottom: var(--spacing-lg);
}

.search-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.search-input {
    font-family: var(--font-mono);
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-md);
    background: white;
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    flex: 1;
    transition: all var(--transition-fast);
    font-weight: 400;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.search-button {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.search-button:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

.search-button:active {
    transform: translateY(0);
}

.help-text {
    color: var(--color-text-muted);
    font-size: 0.75rem;
}

.pulse {
    animation: pulse 2s infinite;
    color: var(--color-accent);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.results-section {
    margin-bottom: var(--spacing-lg);
}

.results-heading {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.results-container {
    display: grid;
    gap: var(--spacing-lg);
}

.model-card {
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.model-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.model-name {
    font-size: 1.125rem;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-accent);
    font-weight: 500;
    line-height: 1.4;
}

.model-name-link {
    text-decoration: none;
    display: block;
}

.model-name-link:hover .model-name {
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

.model-task {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-md) 0;
    font-weight: 400;
}

.model-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 400;
}

.model-popularity {
    color: var(--color-text-muted);
    font-weight: 400;
}

.thermal-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 2px var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.thermal-cool {
    background: color-mix(in srgb, var(--color-thermal-cool) 15%, transparent);
    color: var(--color-thermal-cool);
}

.thermal-warm {
    background: color-mix(in srgb, var(--color-thermal-warm) 15%, transparent);
    color: var(--color-thermal-warm);
}

.thermal-moderate {
    background: color-mix(in srgb, var(--color-thermal-warm) 15%, transparent);
    color: var(--color-thermal-warm);
}

.thermal-hot {
    background: color-mix(in srgb, var(--color-thermal-hot) 15%, transparent);
    color: var(--color-thermal-hot);
}

.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

.error-message {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    color: var(--color-text);
}

.error-message p {
    margin: 0;
}

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.site-footer a {
    color: var(--color-accent);
    text-decoration: none;
}

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

/* Responsive Design */
@media (max-width: 640px) {
    .search-wrapper {
        flex-direction: column;
    }
    
    .site-title {
        font-size: 1.5rem;
    }
}

@media (min-width: 768px) {
    .results-container {
        grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
    }
}