/* Shared styles for the explanation pages. The calculator keeps its own inline
   CSS; these pages are plain articles and share the same palette and type. */
:root {
  --bg: #f6f6f3; --panel: #ffffff; --text: #1c1c1c; --dim: #6a6a66; --line: #e4e3de;
  --accent: #1f5fbf; --accent-soft: #eef3fb; --warn: #8a5300; --warn-bg: #fff4dd;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 16px/1.7 system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 28px 16px 64px; }
nav.top { font-size: 14px; color: var(--dim); margin-bottom: 22px; display: flex; gap: 14px; flex-wrap: wrap; }
nav.top a { color: var(--dim); text-decoration: none; }
nav.top a:hover, nav.top a.on { color: var(--text); }
h1 { font-size: 28px; line-height: 1.3; margin: 0 0 6px; letter-spacing: -0.3px; }
.lead { color: var(--dim); margin: 0 0 26px; font-size: 17px; }
h2 { font-size: 20px; margin: 34px 0 10px; }
h3 { font-size: 17px; margin: 24px 0 6px; }
p { margin: 0 0 14px; }
ul, ol { padding-left: 22px; margin: 0 0 14px; }
li { margin-bottom: 4px; }
table { border-collapse: collapse; width: 100%; margin: 12px 0 18px; font-size: 15px; }
th, td { padding: 8px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: var(--dim); font-weight: 500; font-size: 13px; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.scroll { overflow-x: auto; }
.box { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 14px 0 18px; }
.note { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 10px 14px; margin: 14px 0; font-size: 15px; }
.formula { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 15px; background: var(--panel); border: 1px solid var(--line);
           border-radius: 8px; padding: 10px 14px; margin: 10px 0 16px; overflow-x: auto; white-space: nowrap; }
a { color: var(--accent); }
.cta { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 10px 18px; border-radius: 8px; font-weight: 600; margin-top: 8px; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--dim); font-size: 13px; line-height: 1.6; }
footer a { color: var(--dim); }
@media (max-width: 600px) { main { padding: 20px 12px 48px; } h1 { font-size: 24px; } body { font-size: 15px; } }