:root { color-scheme: light; }
.article-page { margin: 0; color: #392038; background: linear-gradient(135deg, #eee3f1, #fff8e8 54%, #e0f1e6); font: 16px/1.8 system-ui, "Hiragino Kaku Gothic ProN", sans-serif; }
.article-wrap { width: min(900px, calc(100% - 32px)); margin: 0 auto; padding: 24px 0 56px; }
.article-nav, .article-footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding: 12px 2px; color: #665273; font-size: .9rem; }
.article-nav a, .article-footer a, .article-body a { color: #573384; text-underline-offset: .18em; }
.article-brand { margin: 12px 0 4px; color: #693e93; font-size: .78rem; font-weight: 700; letter-spacing: .14em; }
.article-hero, .article-body, .article-card { border: 1px solid rgba(57, 32, 56, .18); border-radius: 18px 7px 18px 7px; background: #fffaf0; box-shadow: 4px 5px 0 rgba(57, 32, 56, .11); }
.article-hero { padding: clamp(22px, 5vw, 42px); }
.article-hero h1 { max-width: 780px; margin: 4px 0 12px; font-size: clamp(1.8rem, 5vw, 3rem); line-height: 1.25; letter-spacing: -.045em; }
.article-hero p { max-width: 720px; margin: 0; color: #665273; }
.article-meta { margin-bottom: 8px !important; color: #693e93 !important; font-size: .8rem; font-weight: 700; letter-spacing: .08em; }
.article-body { margin-top: 22px; padding: clamp(20px, 5vw, 40px); }
.article-body h2 { margin: 1.8em 0 .55em; font-size: clamp(1.25rem, 3.5vw, 1.65rem); line-height: 1.4; }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin: 1.35em 0 .4em; font-size: 1.05rem; }
.article-body p, .article-body li { max-width: 72ch; }
.article-body li + li { margin-top: .35em; }
.article-callout { margin: 1.4em 0; padding: 16px 18px; border-left: 5px solid #49bda9; border-radius: 5px; background: #eef8eb; }
.article-callout p:last-child { margin-bottom: 0; }
.article-table { width: 100%; border-collapse: collapse; margin: 1em 0 1.5em; font-variant-numeric: tabular-nums; }
.article-table th, .article-table td { padding: 10px 12px; border: 1px solid rgba(57, 32, 56, .18); text-align: left; }
.article-table th { background: #efe5f4; }
.sample-file { display: inline-block; margin: .45em 0; padding: 10px 14px; border: 1px solid #392038; border-radius: 8px; background: #c9eec1; color: #392038 !important; font-weight: 700; text-decoration: none; }
.sample-strip { display: block; width: 100%; max-width: 720px; height: auto; margin: 18px auto 6px; border: 1px solid #bdaecc; border-radius: 8px; background: #fff; image-rendering: pixelated; }
.sample-caption { margin: 0; color: #665273; font-size: .86rem; }
.math-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.math-card { padding: 16px; border: 1px solid rgba(57, 32, 56, .2); border-radius: 10px; background: #f4edf7; }
.math-card strong { display: block; margin-bottom: 4px; color: #573384; font-size: 1.25rem; }
.article-list { display: grid; gap: 14px; margin: 24px 0 0; padding: 0; list-style: none; }
.article-card { padding: 20px 22px; }
.article-card h2 { margin: 0 0 7px; font-size: 1.22rem; }
.article-card p { margin: 0; color: #665273; }
.article-card a { color: #573384; text-underline-offset: .18em; }
.article-steps { counter-reset: step; padding-left: 1.4em; }
.article-steps li { padding-left: .2em; }
@media (max-width: 640px) { .article-wrap { width: min(100% - 24px, 900px); padding-top: 12px; } .article-nav { font-size: .82rem; } .article-body { padding: 20px 18px; } .article-table { font-size: .88rem; } .article-table th, .article-table td { padding: 8px 7px; } .math-grid { grid-template-columns: 1fr; gap: 8px; } }