:root {
  --paper: #F6F4EF; --paper-2: #EEEBE3; --card: #FFFFFF;
  --ink: #14161A; --ink-2: #3A3E45; --muted: #6A6E75; --rule: #DAD6CC;
  --accent: #1F5A44; --accent-soft: #E3EDE7; --slash: #2E8A62; --warn: #B4471A; --warn-soft: #F6E4DA;
  --code-bg: #14161A; --code-ink: #E7E5DF; --code-dim: #8B8F96; --code-key: #9CC9F0; --code-str: #C9B37E; --code-ok: #7FC8A3;
  --sans: "IBM Plex Sans", system-ui, -apple-system, Segoe UI, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #111316; --paper-2: #171A1E; --card: #1B1E23; --ink: #ECEAE4; --ink-2: #C5C3BD; --muted: #8F939A; --rule: #2C3036;
    --accent: #5FB58C; --accent-soft: #1A2A23; --slash: #5FB58C; --warn: #E58A5F; --warn-soft: #2E1E16; --code-bg: #0B0C0E;
  }
}
:root[data-theme="dark"] {
  --paper: #111316; --paper-2: #171A1E; --card: #1B1E23; --ink: #ECEAE4; --ink-2: #C5C3BD; --muted: #8F939A; --rule: #2C3036;
  --accent: #5FB58C; --accent-soft: #1A2A23; --slash: #5FB58C; --warn: #E58A5F; --warn-soft: #2E1E16; --code-bg: #0B0C0E;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17.5px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 90%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--rule); }
.nav-in { max-width: 1120px; margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--mono); font-size: 22px; letter-spacing: -0.045em; text-decoration: none; white-space: nowrap; }
.logo .s { color: var(--slash); font-weight: 500; margin-right: .04em; } .logo .p1 { font-weight: 700; } .logo .p2 { font-weight: 300; color: var(--muted); }
.nav-links { display: flex; gap: 24px; align-items: center; font-size: 15px; }
.nav-links a { text-decoration: none; color: var(--ink-2); }
.btn { display: inline-flex; align-items: center; gap: 8px; font: 600 15px/1 var(--sans); padding: 12px 18px; border-radius: 8px; text-decoration: none; border: 1px solid transparent; }
.btn-primary { background: var(--ink); color: var(--paper) !important; }
.btn-ghost { border-color: var(--rule); color: var(--ink) !important; }
@media (max-width: 760px) { .nav-links a:not(.btn) { display: none; } }
@media (max-width: 600px) { .nav-in { padding: 0 16px; } }

article, .list { max-width: 740px; margin: 0 auto; padding: 56px 24px 72px; }
@media (max-width: 600px) { article, .list { padding: 40px 16px 56px; } body { font-size: 16.5px; } }
.crumbs { font-family: var(--mono); font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.crumbs a { text-decoration: none; }
h1 { font-size: clamp(32px, 4.6vw, 44px); line-height: 1.15; letter-spacing: -0.03em; margin: 0; }
.dek { font-size: 20px; color: var(--ink-2); margin: 16px 0 0; line-height: 1.55; }
.meta { font-size: 14px; color: var(--muted); margin-top: 18px; padding-bottom: 28px; border-bottom: 1px solid var(--rule); }
article h2 { font-size: 26px; line-height: 1.25; letter-spacing: -0.02em; margin: 44px 0 12px; }
article h3 { font-size: 19px; margin: 30px 0 8px; }
article p, article li { color: var(--ink-2); }
article ul, article ol { padding-left: 22px; }
article li { margin: 6px 0; }
article strong { color: var(--ink); }
code { font-family: var(--mono); font-size: .86em; background: var(--paper-2); padding: 1px 6px; border-radius: 4px; }
pre { background: var(--code-bg); color: var(--code-ink); border-radius: 12px; padding: 18px 20px; overflow-x: auto; font: 13.5px/1.7 var(--mono); }
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }
pre .c { color: var(--code-dim); } pre .k { color: var(--code-key); } pre .s { color: var(--code-str); }
blockquote { margin: 20px 0; padding: 4px 0 4px 18px; border-left: 3px solid var(--rule); color: var(--ink-2); font-style: italic; }
.tldr { background: var(--card); border: 1px solid var(--rule); border-radius: 12px; padding: 18px 22px; margin: 28px 0; }
.tldr b { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.tldr ul { margin: 0; }
.tbl { overflow-x: auto; margin: 18px 0; border: 1px solid var(--rule); border-radius: 10px; background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 520px; }
th { text-align: left; font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 500; padding: 10px 14px; background: var(--paper-2); border-bottom: 1px solid var(--rule); }
td { padding: 11px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; color: var(--ink-2); }
tr:last-child td { border-bottom: 0; }
td:first-child { color: var(--ink); font-weight: 500; }
.callout { background: var(--accent-soft); border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0; padding: 14px 18px; margin: 22px 0; color: var(--ink); }
.cta { margin: 48px 0 0; background: var(--ink); color: var(--paper); border-radius: 14px; padding: 28px; }
.cta h2 { margin: 0; font-size: 22px; color: var(--paper); }
.cta p { color: color-mix(in srgb, var(--paper) 72%, transparent); margin: 8px 0 18px; }
.cta .row { display: flex; flex-wrap: wrap; gap: 10px; }
.cta .btn-primary { background: var(--paper); color: var(--ink) !important; }
.cta .btn-ghost { border-color: color-mix(in srgb, var(--paper) 30%, transparent); color: var(--paper) !important; }
.sources { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--rule); font-size: 14.5px; }
.sources h2 { font-size: 15px; font-family: var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.sources li { color: var(--muted); }
.related { margin-top: 32px; font-size: 15.5px; }
.related h2 { font-size: 18px; margin: 0 0 8px; }
.disclaim { font-size: 13.5px; color: var(--muted); margin-top: 28px; }

.post-list { list-style: none; padding: 0; margin: 32px 0 0; }
.post-list li { border-top: 1px solid var(--rule); padding: 22px 0; }
.post-list a { text-decoration: none; }
.post-list h2 { font-size: 21px; margin: 0; letter-spacing: -0.015em; line-height: 1.3; }
.post-list a:hover h2 { text-decoration: underline; }
.post-list p { color: var(--ink-2); margin: 6px 0 0; font-size: 16px; }

.calc { background: var(--code-bg); color: var(--code-ink); border-radius: 14px; padding: 24px; margin: 24px 0; }
.calc label { display: flex; justify-content: space-between; font-size: 14.5px; margin: 16px 0 8px; color: #C9C7C1; }
.calc output { font-family: var(--mono); color: var(--code-ink); }
.calc input[type=range] { width: 100%; accent-color: #F08A5D; }
.calc .t { font-family: var(--mono); font-size: 40px; color: #F08A5D; margin-top: 18px; letter-spacing: -0.02em; }
.calc .s { font-size: 14px; color: var(--code-dim); }

footer { border-top: 1px solid var(--rule); padding: 32px 24px 44px; font-size: 13.5px; color: var(--muted); }
footer .in { max-width: 1120px; margin: 0 auto; }
footer p { margin: 0 0 8px; max-width: 90ch; }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }