:root {
    --bg: #f5f6fa;
    --surface: #ffffff;
    --text: #2f3640;
    --muted: #7f8c8d;
    --border: #dcdde1;
    --accent: #44bd32;
    --accent-hover: #3cab2b;
    --shadow: 0 12px 32px rgba(47, 54, 64, 0.06);
    --radius: 18px;
    --container: 1200px;
    --container-wide: 1440px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

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

.muted-text {
    color: var(--muted);
}

.mono-cell {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 12px;
    word-break: break-all;
}