:root {
    color-scheme: light;
    --text: #1f2933;
    --muted: #5b6673;
    --border: #d8dee6;
    --accent: #1d4ed8;
    --soft: #f5f7fa;
    --max-width: 920px;
}

* {
    box-sizing: border-box;
}

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

main {
    width: min(100% - 32px, var(--max-width));
    margin: 0 auto;
    padding: 32px 0 56px;
}

h1,
h2 {
    line-height: 1.2;
    margin: 0 0 14px;
}

h1 {
    font-size: clamp(1.8rem, 4vw, 2.7rem);
    letter-spacing: 0;
}

h2 {
    font-size: clamp(1.35rem, 3vw, 1.9rem);
    margin-top: 34px;
}

p {
    margin: 0 0 16px;
    font-size: 1.02rem;
}

a {
    color: var(--accent);
    font-weight: 700;
}

.top-menu {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 22px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--accent);
    background: var(--soft);
    text-decoration: none;
    font-size: 0.95rem;
}

.source {
    padding: 14px 16px;
    border-left: 4px solid var(--accent);
    background: var(--soft);
    color: var(--muted);
    margin: 22px 0 28px;
}

.figure {
    margin: 22px 0 30px;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: #ffffff;
}

.figure img {
    display: block;
    width: 100%;
    height: auto;
}

figcaption {
    padding: 12px 14px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.95rem;
}

.note {
    margin-top: 18px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--soft);
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.45;
}

.note h2 {
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1rem;
    color: var(--text);
}

.note p {
    margin: 0 0 10px;
    font-size: inherit;
}

.note ul {
    margin: 8px 0 12px 18px;
    padding: 0;
}

.note li {
    margin-bottom: 4px;
}

@media (max-width: 600px) {
    main {
        width: min(100% - 22px, var(--max-width));
        padding-top: 22px;
    }

    p {
        font-size: 1rem;
    }
}