/* Color Accessibility Checker – Styles */
:root {
    --color-bg: #F8F9FC;
    --color-surface: #FFFFFF;
    --color-text: #1A1A2E;
    --color-text-secondary: #4A4A6A;
    --color-primary: #4A00E0;
    --color-primary-light: #8E2DE2;
    --color-accent: #00C9A7;
    --color-danger: #E63946;
    --color-warning: #F4A261;
    --color-success: #2A9D8F;
    --color-border: #E2E8F0;
    --sidebar-bg: #16213E;
    --sidebar-text: #E0E0E0;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
    --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: #fff;
    padding: 8px 16px;
    z-index: 1000;
    transition: top 0.2s;
}
.skip-link:focus {
    top: 0;
}

/* Header */
.site-header {
    background: var(--sidebar-bg);
    color: #fff;
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 16px rgba(0,0,0,0.15);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
}
.nav-list {
    list-style: none;
    display: flex;
    gap: 24px;
}
.nav-list a {
    color: var(--sidebar-text);
    text-decoration: none;
    font-weight: 500;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}
.nav-list a:hover,
.nav-list a.active {
    color: #fff;
    border-bottom-color: var(--color-accent);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    padding: 60px 0 50px;
    text-align: center;
}
.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}
.hero-subtitle {
    font-size: 1.2rem;
    max-width: 650px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Section titles */
.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* Tool Section */
.tool-section {
    padding: 48px 0;
}
.tool-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.input-panel {
    background: var(--color-surface);
    padding: 28px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}
.color-input-group {
    margin-bottom: 20px;
}
.color-input-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.95rem;
}
.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}
.color-input-wrapper input[type="color"] {
    width: 44px;
    height: 44px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 2px;
    background: #fff;
}
.color-input-wrapper input[type="text"] {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 1rem;
    transition: border-color 0.2s;
}
.color-input-wrapper input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74,0,224,0.1);
}
.hint {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-top: 4px;
}
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}
.btn-secondary:hover {
    background: #EDF2F7;
    border-color: #CBD5E0;
}

.preview-panel {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    overflow: hidden;
    display: flex;
    align-items: stretch;
}
.preview-box {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    text-align: center;
    transition: background-color 0.3s, color 0.3s;
    min-height: 200px;
}
.preview-text-large {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
}
.preview-text-small {
    font-size: 1rem;
    margin-top: 12px;
    max-width: 280px;
}

/* Results */
.results-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}
.result-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: transform 0.2s, box-shadow 0.2s;
}
.result-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.result-card h3 {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.ratio-value {
    font-size: 2rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--color-primary);
}
.status {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.status.pass { color: var(--color-success); }
.status.fail { color: var(--color-danger); }
.threshold {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* Info Section */
.info-section {
    padding: 48px 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.info-card {
    padding: 24px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}
.info-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.info-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Tips */
.tips-section {
    padding: 48px 0;
}
.tips-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}
.tips-list li {
    padding: 16px 20px;
    background: var(--color-surface);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    font-size: 0.95rem;
}

/* Footer */
.site-footer {
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 32px 0;
    margin-top: auto;
}
.site-footer .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}
.footer-nav {
    list-style: none;
    display: flex;
    gap: 20px;
}
.footer-nav a {
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}
.footer-nav a:hover {
    color: #fff;
}

/* About page */
.about-section {
    padding: 48px 0;
}
.about-content {
    max-width: 720px;
    margin: 0 auto;
}
.about-content h2 {
    font-size: 1.6rem;
    margin-top: 32px;
    margin-bottom: 12px;
}
.about-content p {
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

/* Legal pages */
.legal-section {
    padding: 48px 0;
    max-width: 720px;
    margin: 0 auto;
}
.legal-section h2 {
    font-size: 1.6rem;
    margin-top: 32px;
    margin-bottom: 12px;
}
.legal-section p {
    margin-bottom: 16px;
    color: var(--color-text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .tool-grid {
        grid-template-columns: 1fr;
    }
    .section-title {
        font-size: 1.4rem;
    }
    .results-panel {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
    .site-footer .container {
        flex-direction: column;
        text-align: center;
    }
    .footer-nav {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-list {
        gap: 16px;
    }
    .preview-box {
        padding: 24px;
    }
    .preview-text-large {
        font-size: 3rem;
    }
}



/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}