/* Bike-build guides — shared style. Hermit Purple accent (matches the frame). */
:root {
  --purple: #6b4e9e;
  --purple-dk: #4d3773;
  --ink: #1d1b22;
  --muted: #6a6675;
  --line: #e6e2ee;
  --bg: #faf8fc;
  --green: #2f7a4d;
  --green-bg: #eaf6ef;
  --blue: #2b6cb0;
  --blue-bg: #e9f1fa;
  --amber: #9a6700;
  --amber-bg: #fbf3e0;
  --red: #9b2c2c;
  --red-bg: #fbeaea;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 Charter, Georgia, "Times New Roman", serif;
  padding: 0 18px;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 28px 0 80px; }
nav.top {
  font: 13px/1 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  letter-spacing: .02em;
  padding: 18px 0 0;
  max-width: 720px; margin: 0 auto;
}
nav.top a { color: var(--purple); text-decoration: none; }
nav.top a:hover { text-decoration: underline; }

h1, h2, h3, .badge, .kicker, table, .callout strong, .grid-card h3 {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
.kicker {
  text-transform: uppercase; letter-spacing: .12em; font-size: 12px;
  color: var(--purple); font-weight: 700; margin: 0 0 6px;
}
h1 { font-size: 30px; line-height: 1.15; margin: 0 0 10px; letter-spacing: -.01em; }
h2 { font-size: 21px; margin: 36px 0 8px; padding-top: 8px; }
h3 { font-size: 16px; margin: 22px 0 4px; }
p { margin: 12px 0; }
a { color: var(--purple-dk); }

.badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 6px; }
.badge {
  font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 100px;
  border: 1px solid var(--line); background: #fff; color: var(--muted);
}
.badge.easy   { color: var(--green); border-color: #bfe3cd; background: var(--green-bg); }
.badge.medium { color: var(--amber); border-color: #efdcae; background: var(--amber-bg); }
.badge.hard   { color: var(--red);   border-color: #efc4c4; background: var(--red-bg); }

.lede { font-size: 19px; color: #36323f; }

.callout {
  border-left: 4px solid var(--purple); background: #fff;
  border-radius: 0 8px 8px 0; padding: 12px 16px; margin: 18px 0;
  font-size: 15.5px; box-shadow: 0 1px 0 var(--line);
}
.callout strong { display: block; font-size: 12px; letter-spacing: .06em;
  text-transform: uppercase; margin-bottom: 4px; }
.callout.eli5  { border-color: var(--purple); background: #f6f2fb; }
.callout.eli5 strong  { color: var(--purple); }
.callout.buy   { border-color: var(--green); background: var(--green-bg); }
.callout.buy strong   { color: var(--green); }
.callout.tools { border-color: var(--blue); background: var(--blue-bg); }
.callout.tools strong { color: var(--blue); }
.callout.gotcha{ border-color: var(--amber); background: var(--amber-bg); }
.callout.gotcha strong{ color: var(--amber); }
.callout.danger{ border-color: var(--red); background: var(--red-bg); }
.callout.danger strong{ color: var(--red); }

ul, ol { margin: 12px 0; padding-left: 22px; }
li { margin: 6px 0; }

table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }

code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #efeaf6; padding: 1px 5px; border-radius: 4px; font-size: 14px; }
.eq { background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 16px; margin: 14px 0; font-family: ui-monospace, Menlo, monospace;
  font-size: 14.5px; line-height: 1.7; }

hr { border: none; border-top: 1px solid var(--line); margin: 34px 0; }
.foot { color: var(--muted); font-size: 13px; margin-top: 40px;
  font-family: ui-sans-serif, system-ui, sans-serif; }

/* index grid */
.grid { display: grid; gap: 14px; margin: 22px 0; }
.grid-card { display: block; text-decoration: none; color: inherit;
  border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px;
  background: #fff; transition: border-color .15s, transform .15s; }
.grid-card:hover { border-color: var(--purple); transform: translateY(-1px); }
.grid-card h3 { margin: 0 0 4px; color: var(--purple-dk); }
.grid-card p { margin: 0; font-size: 14.5px; color: var(--muted); }
.grid-card .num { font-family: ui-monospace, Menlo, monospace; color: var(--purple);
  font-size: 13px; }