:root {
    --site-bg: #f2f6fb;
    --site-surface: #ffffff;
    --site-text: #1f2937;
    --site-border: #d3deea;
    --site-accent: #1d4ed8;
    --site-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

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

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--site-text);
    background: var(--site-bg);
}

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

pre,
code {
    tab-size: 4;
}

pre {
    overflow-x: auto;
}

a {
    text-underline-offset: 0.15em;
}

:focus-visible {
    outline: 2px solid var(--site-accent);
    outline-offset: 2px;
}

@media (max-width: 1024px) {
    body {
        font-size: 0.98rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 0.92rem;
    }
}