/* meritor.online — stylesheet. System fonts only: no web font, no CDN, no third-party request. */

:root {
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg: #f4f3f9;
  --surface: #ffffff;
  --surface-2: #faf9fe;
  --text: #1a1824;
  --text-soft: #4e4b60;
  --text-faint: #6f6c82;
  --line: #e2e0ee;
  --line-strong: #cfccdf;

  --brand: #5b45e0;
  --brand-ink: #3d2bb0;
  --brand-wash: #efecfd;
  --accent: #c2690d;
  --accent-wash: #fdf2e2;
  --teal: #0f7b86;

  --radius: 14px;
  --radius-s: 9px;
  --shadow: 0 1px 2px rgba(26, 24, 36, .05), 0 8px 24px -14px rgba(26, 24, 36, .28);
  --shadow-lg: 0 2px 4px rgba(26, 24, 36, .06), 0 20px 48px -22px rgba(26, 24, 36, .35);

  --wrap: 1180px;
  --measure: 70ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #100f17;
    --surface: #191825;
    --surface-2: #1f1d2d;
    --text: #eceaf5;
    --text-soft: #b8b4cb;
    --text-faint: #908ca6;
    --line: #2c2a3d;
    --line-strong: #3b3851;
    --brand: #a493ff;
    --brand-ink: #c3b7ff;
    --brand-wash: #221f3a;
    --accent: #f0ad5c;
    --accent-wash: #2b2113;
    --teal: #4fd1dd;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -14px rgba(0, 0, 0, .7);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .45), 0 20px 48px -22px rgba(0, 0, 0, .8);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--brand-ink); text-underline-offset: 2px; }
a:hover { color: var(--brand); }

:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--surface); color: var(--text); padding: .7rem 1rem;
  border: 1px solid var(--line-strong); border-radius: 0 0 var(--radius-s) 0;
}
.skip:focus { left: 0; }

/* ---------- Disclosure bar (always first in the source) ---------- */

.disclosure-bar {
  background: var(--accent-wash);
  border-bottom: 1px solid var(--line);
  color: var(--text);
  font-size: .86rem;
  line-height: 1.45;
}
.disclosure-bar p { margin: 0; padding: .6rem 0; max-width: var(--wrap); }
.disclosure-bar strong { font-weight: 650; }

/* ---------- Shell ---------- */

.shell { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.site-head {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 40;
}
.site-head .shell {
  display: flex; align-items: center; gap: 1rem;
  min-height: 66px; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--text); font-weight: 680; letter-spacing: -.02em; font-size: 1.12rem; }
.brand svg { display: block; width: 30px; height: 30px; }
.brand span small { display: block; font-size: .64rem; font-weight: 550; letter-spacing: .1em; text-transform: uppercase; color: var(--text-faint); }

.nav { margin-left: auto; display: flex; flex-wrap: wrap; gap: .25rem; }
.nav a {
  text-decoration: none; color: var(--text-soft); font-size: .92rem; font-weight: 550;
  padding: .4rem .7rem; border-radius: 99px;
}
.nav a:hover { background: var(--brand-wash); color: var(--brand-ink); }
.nav a[aria-current="page"] { background: var(--brand-wash); color: var(--brand-ink); }

/* ---------- Layout ---------- */

.layout { display: grid; gap: 2.5rem; padding: 2rem 0 3rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 1000px) {
  .layout { grid-template-columns: minmax(0, 1fr) 312px; align-items: start; }
  .layout > .rail { position: sticky; top: 88px; }
}
.layout > main { min-width: 0; }

.page { padding: 2rem 0 3rem; }
.page main { max-width: var(--measure); }

/* ---------- Typography ---------- */

h1, h2, h3, h4 { line-height: 1.22; letter-spacing: -.021em; color: var(--text); text-wrap: balance; }
h1 { font-size: clamp(1.95rem, 1.2rem + 2.6vw, 2.9rem); margin: .2rem 0 .7rem; font-weight: 700; }
h2 { font-size: clamp(1.4rem, 1.1rem + 1.1vw, 1.78rem); margin: 2.6rem 0 .8rem; font-weight: 670; }
h3 { font-size: 1.16rem; margin: 1.9rem 0 .5rem; font-weight: 650; }
h4 { font-size: 1rem; margin: 1.3rem 0 .4rem; font-weight: 650; }
p { margin: 0 0 1.1rem; }
.lede { font-size: 1.16rem; line-height: 1.6; color: var(--text-soft); max-width: 62ch; }
article { max-width: var(--measure); }
article ul, article ol { margin: 0 0 1.2rem; padding-left: 1.3rem; }
article li { margin: .38rem 0; }
article li::marker { color: var(--brand); }
strong { font-weight: 650; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.4rem 0; }
code { font-family: var(--font-mono); font-size: .9em; background: var(--surface-2); border: 1px solid var(--line); border-radius: 5px; padding: .08em .35em; }

.eyebrow {
  display: inline-block; font-size: .72rem; font-weight: 650; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brand-ink); background: var(--brand-wash);
  padding: .3rem .7rem; border-radius: 99px; margin-bottom: .6rem;
}

.byline {
  display: flex; flex-wrap: wrap; gap: .4rem 1rem; align-items: baseline;
  font-size: .9rem; color: var(--text-faint);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: .7rem 0; margin: 1.3rem 0 1.8rem;
}
.byline b { color: var(--text-soft); font-weight: 600; }

/* ---------- Cards, callouts ---------- */

.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.15rem 1.25rem; box-shadow: var(--shadow);
}
.card h3, .card h4 { margin-top: 0; }
.card > :last-child { margin-bottom: 0; }

.callout {
  background: var(--surface); border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
  border-radius: var(--radius-s); padding: 1rem 1.15rem; margin: 1.6rem 0;
  font-size: .97rem;
}
.callout > :last-child { margin-bottom: 0; }
.callout h3, .callout h4 { margin-top: 0; font-size: 1rem; }
.callout--warn { border-left-color: var(--accent); background: var(--accent-wash); }
.callout--fact { border-left-color: var(--teal); }

/* Affiliate disclosure box directly under the H1 */
.ad-disclosure {
  background: var(--accent-wash); border: 1px solid var(--line-strong);
  border-radius: var(--radius); padding: 1.05rem 1.2rem; margin: 0 0 1.8rem;
  font-size: .94rem; line-height: 1.55;
}
.ad-disclosure > :last-child { margin-bottom: 0; }
.ad-disclosure h2 { font-size: .95rem; margin: 0 0 .45rem; letter-spacing: .01em; }

/* ---------- Buttons / CTA ---------- */

.cta-box {
  background: var(--surface); border: 1px solid var(--line-strong);
  border-radius: var(--radius); padding: 1.35rem; margin: 2.2rem 0;
  box-shadow: var(--shadow-lg);
}
.cta-box h3 { margin-top: 0; }
.cta-box > :last-child { margin-bottom: 0; }

.btn {
  display: block; width: 100%; text-align: center; text-decoration: none;
  background: var(--brand); color: #fff;
  font-weight: 640; font-size: 1.02rem; line-height: 1.3;
  padding: .9rem 1.2rem; border-radius: var(--radius-s);
  border: 1px solid transparent;
  transition: transform .12s ease, background-color .12s ease;
}
@media (prefers-color-scheme: dark) { .btn { color: #15121f; } }
.btn:hover { background: var(--brand-ink); color: #fff; transform: translateY(-1px); }
@media (prefers-color-scheme: dark) { .btn:hover { color: #15121f; } }
.btn:active { transform: none; }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } }
.btn .btn-tag {
  display: block; font-size: .72rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; opacity: .92; margin-top: .3rem;
}
.cta-note {
  display: block; margin: .6rem 0 0; font-size: .84rem; line-height: 1.5;
  color: var(--text-faint);
}
.cta-note--center { text-align: center; }

/* ---------- Figures ---------- */

figure {
  margin: 2rem 0; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.1rem .9rem;
}
figure svg, figure img { display: block; width: 100%; height: auto; }
figcaption {
  margin-top: .85rem; padding-top: .7rem; border-top: 1px solid var(--line);
  font-size: .86rem; line-height: 1.5; color: var(--text-faint);
}
figcaption b { color: var(--text-soft); font-weight: 600; }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; margin: 1.6rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; }
th, td { text-align: left; padding: .68rem .85rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--surface-2); font-weight: 650; font-size: .82rem; letter-spacing: .04em; text-transform: uppercase; color: var(--text-faint); }
tbody tr:last-child td { border-bottom: 0; }

/* ---------- Rail ---------- */

.rail { display: grid; gap: 1.25rem; align-content: start; }
.rail .card h4 { font-size: .95rem; }
.rail ul { margin: 0; padding-left: 1.1rem; font-size: .93rem; }
.rail li { margin: .3rem 0; }
.toc ol { margin: 0; padding-left: 1.2rem; font-size: .93rem; }
.toc li { margin: .32rem 0; }
.toc a { color: var(--text-soft); text-decoration: none; }
.toc a:hover { color: var(--brand-ink); text-decoration: underline; }

/* ---------- Footer ---------- */

.site-foot {
  background: var(--surface); border-top: 1px solid var(--line);
  margin-top: 2rem; padding: 2.4rem 0 2.8rem; font-size: .9rem; color: var(--text-soft);
}
.foot-grid { display: grid; gap: 1.8rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr; gap: 2.4rem; } }
.foot-grid h2 { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--text-faint); margin: 0 0 .7rem; font-weight: 650; }
.foot-grid ul { list-style: none; margin: 0; padding: 0; }
.foot-grid li { margin: .32rem 0; }
.foot-grid a { color: var(--text-soft); text-decoration: none; }
.foot-grid a:hover { color: var(--brand-ink); text-decoration: underline; }
.foot-id { font-style: normal; line-height: 1.6; }
.foot-id b { color: var(--text); font-weight: 650; }
.legal-strip {
  margin-top: 2rem; padding-top: 1.3rem; border-top: 1px solid var(--line);
  font-size: .82rem; color: var(--text-faint); line-height: 1.6;
}
.legal-strip p { margin: 0 0 .6rem; }
.legal-strip p:last-child { margin-bottom: 0; }

/* ---------- Misc ---------- */

.grid-2 { display: grid; gap: 1.1rem; grid-template-columns: minmax(0, 1fr); margin: 1.6rem 0; }
@media (min-width: 680px) { .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.pill-row { display: flex; flex-wrap: wrap; gap: .45rem; margin: 1.2rem 0 1.6rem; padding: 0; list-style: none; }
.pill-row li { font-size: .84rem; background: var(--surface); border: 1px solid var(--line); border-radius: 99px; padding: .3rem .75rem; color: var(--text-soft); }
.updated { font-size: .85rem; color: var(--text-faint); }
.q { font-weight: 650; margin-bottom: .3rem; }
.center { text-align: center; }
.big-404 { font-size: clamp(3.5rem, 2rem + 8vw, 6rem); font-weight: 700; letter-spacing: -.04em; color: var(--brand); margin: 0; line-height: 1; }
.rail-h { font-size: .95rem; margin: 0 0 .6rem; }
.rail-p { font-size: .93rem; }