* { box-sizing: border-box; }
:root { color-scheme: dark; font-family: system-ui, sans-serif; color: #edf4f7; background: #0a1724; }
body { margin: 0; line-height: 1.8; }
a { color: #78e6c6; text-underline-offset: .2em; }
a:hover { color: #c7fff0; }
a:focus-visible { outline: 3px solid #78e6c6; outline-offset: 4px; }
.editorial-nav { max-width: 1200px; margin: auto; padding: 1.4rem 1.5rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; border-bottom: 1px solid #365164; }
nav { display: flex; flex-wrap: wrap; gap: 1rem; }
.brand { font-weight: 800; color: #edf4f7; text-decoration: none; }
main { width: min(100% - 3rem, 850px); margin: 3.5rem auto; }
h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.15; letter-spacing: -.035em; }
h2 { line-height: 1.35; margin-top: 2.5rem; font-size: 1.5rem; }
p { margin: 1.15rem 0; }
.lead { color: #c5d6e0; font-size: 1.2rem; }
.byline { font-size: .85rem; color: #a6bbc9; }
.article-toc, .related { display: block; padding: 1rem 1.5rem; border: 1px solid #365164; border-radius: 16px; background: #102437; margin: 2.5rem 0; }
.article-toc h2, .related h2 { margin-top: .5rem; }
section { scroll-margin-top: 1rem; }
footer { max-width: 1100px; margin: 4rem auto 0; border-top: 1px solid #365164; padding: 2rem 1.5rem; color: #b3c7d3; font-size: .9rem; }
.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 1.2rem; }
.guide-card { display: block; border: 1px solid #365164; border-radius: 16px; padding: 1.5rem; background: #102437; }
.guide-card h2 { margin-top: 0; font-size: 1.25rem; }
.guide-card p { color: #c5d6e0; }
@media (max-width: 600px) { main { width: calc(100% - 2rem); margin-top: 2rem; } .guide-grid { grid-template-columns: 1fr; } .article-toc { padding: .75rem 1rem; } }

.table-wrap { overflow-x: auto; margin: 2rem 0; }
table { width: 100%; border-collapse: collapse; font-size: .95rem; }
caption { text-align: left; font-weight: 700; padding-bottom: .7rem; }
th, td { padding: .65rem; border: 1px solid #365164; text-align: left; }
.formula { border-left: 4px solid #78e6c6; padding-left: 1rem; }