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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f3f4f6;
    --bg-article: #f3f4f6;
    --border-color: #d1d5db;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Sarabun', 'Prompt', 'Kanit', sans-serif;
    font-size: 18px;
    line-height: 1.6;
    color: var(--text-primary);
    background: #ffffff;
    min-height: 100vh;
}

.site-footer {
    background: #1f2937;
    color: #ffffff;
    padding: 32px 20px;
    margin-top: 48px;
}

.site-footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.site-footer-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.site-footer-tagline {
    color: #9ca3af;
    margin-bottom: 16px;
    font-size: 0.98rem;
}

.site-footer-highlights {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    color: #9ca3af;
    font-size: 0.92rem;
    margin-bottom: 16px;
}

.site-footer-byline {
    color: #6b7280;
    font-size: 0.92rem;
    margin-bottom: 10px;
}

.site-footer-link {
    color: #60a5fa;
    text-decoration: none;
    transition: color 0.2s;
}

.site-footer-link:hover {
    color: #93c5fd;
}

.site-footer-top {
    display: inline-block;
    margin-top: 6px;
    font-size: 0.92rem;
}

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