/* site.css — single stylesheet, no frameworks, ~6KB. Mobile-first. */
:root {
  --bg: #f7f9fa;
  --surface: #ffffff;
  --ink: #16242e;
  --ink-soft: #51626e;
  --line: #dde5e9;
  --accent: #0a7d8c;
  --accent-dark: #075964;
  --accent-soft: #e3f2f4;
  --warn-bg: #fdf3e3;
  --warn-line: #e8c98a;
  --info-bg: #e9f1fb;
  --info-line: #a9c6e8;
  --radius: 10px;
  --max: 960px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85em; }
.muted { color: var(--ink-soft); font-size: .9rem; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
h1 { font-size: 1.7rem; line-height: 1.25; margin: .2em 0 .4em; }
h2 { font-size: 1.25rem; margin: 1.6em 0 .5em; }
h3 { font-size: 1.05rem; margin: 1.4em 0 .4em; }
@media (min-width: 700px) { h1 { font-size: 2.1rem; } }

/* layout */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
header.site {
  background: var(--surface); border-bottom: 1px solid var(--line);
}
header.site .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem 1.2rem; padding-top: 10px; padding-bottom: 10px; }
.logo { display: flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--ink); font-weight: 700; }
.logo svg { width: 26px; height: 26px; }
nav.main { display: flex; flex-wrap: wrap; gap: .2rem .9rem; font-size: .92rem; }
nav.main a { text-decoration: none; color: var(--ink-soft); padding: 2px 0; }
nav.main a:hover, nav.main a[aria-current="page"] { color: var(--accent-dark); border-bottom: 2px solid var(--accent); }
main { padding: 1.4rem 0 2.5rem; }
footer.site { border-top: 1px solid var(--line); background: var(--surface); padding: 1.4rem 0 2rem; font-size: .85rem; color: var(--ink-soft); }
footer.site nav { display: flex; flex-wrap: wrap; gap: .3rem 1rem; margin-bottom: .6rem; }
footer.site a { color: var(--ink-soft); }

/* cards / callouts */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; margin: 1rem 0; }
.callout { border-radius: var(--radius); padding: .7rem 1rem; margin: .8rem 0; font-size: .95rem; }
.callout.warn { background: var(--warn-bg); border: 1px solid var(--warn-line); }
.callout.info { background: var(--info-bg); border: 1px solid var(--info-line); }
.callout p { margin: .3em 0; }

/* calculator form */
form#calc { display: grid; gap: .9rem; grid-template-columns: 1fr 1fr; }
form#calc .full { grid-column: 1 / -1; }
@media (max-width: 560px) { form#calc { grid-template-columns: 1fr; } form#calc .full { grid-column: auto; } }
form#calc label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: .25rem; color: var(--ink-soft); }
form#calc input[type=number], form#calc select {
  width: 100%; padding: .55rem .6rem; font-size: 1rem; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; color: var(--ink);
}
form#calc input:focus, form#calc select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.check { display: flex; align-items: center; gap: .5rem; font-size: .95rem; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); }

/* zone guide */
.zone-guide { margin-top: .4rem; }
.zone-strip { display: flex; gap: 3px; margin: .4rem 0 .3rem; }
.zone-strip button {
  flex: 1; border: 1px solid var(--line); border-radius: 6px; padding: .45rem 0;
  font-weight: 700; cursor: pointer; color: #fff; font-size: .9rem;
  min-height: 44px;
}
.zone-strip button.active { outline: 3px solid var(--ink); outline-offset: 1px; }
.zone-strip button:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
/* z3 changed from #e67e22 (2.85:1 fail) → #ae5f19 (~4.6:1 pass) */
/* z4 changed from #b8a93a (2.39:1 fail) → #807628 (~4.6:1 pass) */
.z1 { background: #c0392b; } .z2 { background: #d35400; } .z3 { background: #ae5f19; }
.z4 { background: #807628; } .z5 { background: #4f9d69; } .z6 { background: #3b7ea1; }
.z7 { background: #34618e; } .z8 { background: #5b4d8a; }
.zone-examples { font-size: .8rem; color: var(--ink-soft); }

/* result */
#result { margin-top: 1.2rem; }
#result.has-result { border-top: 2px solid var(--accent); padding-top: 1rem; }
.result-why { margin: .3rem 0 .8rem; font-size: .88rem; }
.result-head { display: flex; flex-wrap: wrap; gap: .5rem 2rem; align-items: baseline; }
.result-num .big { font-size: 2.3rem; font-weight: 800; color: var(--accent-dark); letter-spacing: -.5px; }
.result-class { font-size: 1.05rem; }
.tag { background: var(--accent-soft); color: var(--accent-dark); padding: 2px 8px; border-radius: 999px; font-size: .78rem; font-weight: 600; }
details.steps { margin: .8rem 0; font-size: .92rem; }
details.steps summary { cursor: pointer; color: var(--accent-dark); font-weight: 600; }
details.steps ul { margin: .5rem 0; }

/* tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: .6rem 0 1rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .88rem; min-width: 640px; }
th, td { text-align: left; padding: .55rem .65rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--accent-soft); color: var(--accent-dark); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
td .better { color: #1e7d3c; font-weight: 700; }

/* affiliate slots: invisible until activated by config.js */
.aff-slot { display: inline; }
.aff-link { display: inline-block; margin-left: .5rem; font-weight: 600; }
.aff-ribbon { font-size: .8rem; color: var(--ink-soft); }

/* hero */
.hero { padding: .6rem 0 0; }
.hero p.lede { font-size: 1.05rem; color: var(--ink-soft); max-width: 46rem; }

/* misc */
.btn {
  display: inline-block; background: var(--accent); color: #fff; text-decoration: none;
  padding: .6rem 1.1rem; border-radius: 8px; font-weight: 600;
}
.btn:hover { background: var(--accent-dark); color: #fff; }
.grid2 { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }
ul.linklist { padding-left: 1.1rem; }
ul.linklist li { margin: .25rem 0; }
.crumbs { font-size: .82rem; color: var(--ink-soft); margin-bottom: .6rem; }
.crumbs a { color: var(--ink-soft); }
.disclaimer-line { border-top: 1px dashed var(--line); padding-top: .6rem; margin-top: 1.2rem; }
.kv { display: grid; grid-template-columns: max-content 1fr; gap: .25rem 1rem; font-size: .92rem; }
.kv dt { font-weight: 600; color: var(--ink-soft); }
.kv dd { margin: 0; }