/* =========================================================================
   Sellers Sanity — theme: CORPORATE SLATE  (getsellerssanity.com)
   Cool steel palette · structured, boxed, left-aligned · IBM Plex headings
   ========================================================================= */

:root {
  --brand: #ef6415;
  --brand-ink: #cc540c;
  --brand-soft: #fdece0;

  --ink: #1b2431;
  --ink-soft: #3f4c5c;
  --muted: #647082;
  --line: #dbe1e8;
  --line-soft: #e9edf1;

  --bg: #ffffff;
  --bg-alt: #f3f5f8;
  --navy: #1b2431;

  --radius: 6px;
  --container: 1140px;
  --font-head: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-body: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-body); background: var(--bg); color: var(--ink-soft); line-height: 1.65; -webkit-font-smoothing: antialiased; }
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; color: var(--ink); }
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }
.skip-link { position: absolute; left: -999px; top: 0; z-index: 200; background: var(--navy); color: #fff; padding: 10px 16px; }
.skip-link:focus { left: 0; }

/* header */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--bg); border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-head); font-weight: 600; font-size: 16.5px; color: var(--ink); text-decoration: none; }
.brand__mark { width: 30px; height: 30px; flex: 0 0 30px; border-radius: 6px; }
.nav__links { display: flex; align-items: center; gap: 2px; list-style: none; }
.nav__links a { font-family: var(--font-head); font-weight: 500; font-size: 14px; color: var(--ink-soft); text-decoration: none; padding: 10px 14px; border-bottom: 2px solid transparent; }
.nav__links a:hover { color: var(--ink); border-color: var(--line); text-decoration: none; }
.nav__links a[aria-current="page"] { color: var(--brand-ink); border-color: var(--brand); }
.nav__toggle { display: none; background: none; border: 1px solid var(--line); border-radius: 4px; width: 40px; height: 40px; cursor: pointer; color: var(--ink); }
.nav__toggle svg { margin: 0 auto; }
@media (max-width: 780px) {
  .nav__toggle { display: grid; place-items: center; }
  .nav__links { position: absolute; left: 0; right: 0; top: 66px; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 6px 28px 14px; }
  .nav__links[hidden] { display: none; }
  .nav__links a { padding: 13px 0; font-size: 15px; border-bottom: 1px solid var(--line-soft); }
}

/* sections */
.section { padding: 72px 0; }
.section--alt { background: var(--bg-alt); }
.section + .section { border-top: 1px solid var(--line); }
.section__head { max-width: 680px; margin-bottom: 40px; }
.eyebrow { display: inline-block; font-family: var(--font-head); font-size: 11.5px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--brand-ink); border-left: 3px solid var(--brand); padding: 2px 0 2px 10px; margin-bottom: 18px; }
h2.section__title { font-size: clamp(24px, 3vw, 32px); font-weight: 600; }
.section__lead { color: var(--muted); font-size: 16px; margin-top: 12px; }

.prose p { color: var(--ink-soft); font-size: 15.5px; }
.prose p + p { margin-top: 15px; }
.prose h3 { font-size: 18px; font-weight: 600; margin: 28px 0 8px; }
.prose > h3:first-child { margin-top: 0; }

/* hero */
.hero { padding: 68px 0 60px; background: var(--bg-alt); border-bottom: 1px solid var(--line); }
.hero .container { max-width: var(--container); }
.hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 600; max-width: 20ch; }
.hero p { margin-top: 16px; font-size: 17px; color: var(--muted); max-width: 56ch; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.chip { background: var(--bg); border: 1px solid var(--line); border-radius: 3px; padding: 6px 12px; font-size: 12.5px; font-weight: 500; color: var(--ink-soft); }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-head); font-weight: 600; font-size: 14.5px; padding: 12px 22px; border-radius: 4px; border: 1px solid transparent; text-decoration: none; transition: background .15s, border-color .15s, color .15s; }
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--brand); color: #fff; }
.btn--primary:hover { background: var(--brand-ink); }
.btn--ghost { background: var(--bg); color: var(--ink); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--ink-soft); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn-row--center { justify-content: flex-start; }

/* grids */
.grid { display: grid; gap: 1px; margin-top: 36px; background: var(--line); border: 1px solid var(--line); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--bg); border: none; border-top: 3px solid var(--brand); padding: 24px; }
.section--alt .card { background: var(--bg); }
.card__num { font-family: var(--font-head); font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: 0.1em; }
.card h3 { font-size: 16px; font-weight: 600; margin: 8px 0 8px; }
.card p { font-size: 13.5px; color: var(--muted); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: step; margin-top: 8px; border: 1px solid var(--line); }
.step { padding: 24px; border-right: 1px solid var(--line); }
.step:last-child { border-right: none; }
.step::before { counter-increment: step; content: "Step " counter(step); font-family: var(--font-head); font-weight: 700; font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--brand-ink); display: block; margin-bottom: 10px; }
.step h3 { font-size: 16px; font-weight: 600; margin: 0 0 6px; }
.step p { color: var(--muted); font-size: 13.5px; }

/* split + facts */
.split { display: grid; grid-template-columns: 1.4fr 0.6fr; gap: 44px; align-items: start; }
.facts { background: var(--bg-alt); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.section--alt .facts { background: var(--bg); }
.facts h3 { font-family: var(--font-head); font-size: 11.5px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.facts ul { list-style: none; display: grid; gap: 10px; }
.facts li { display: flex; gap: 10px; font-size: 14px; color: var(--ink-soft); }
.facts li::before { content: "\2013"; color: var(--brand); }

/* deflist — table-like */
.deflist { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); }
.deflist > div { padding: 16px 20px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); }
.deflist > div:nth-child(2n) { border-right: none; }
.deflist > div:nth-last-child(-n+2) { border-bottom: none; }
.deflist dt { font-family: var(--font-head); font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 5px; }
.deflist dd { font-size: 15.5px; font-weight: 500; color: var(--ink); }

.note { margin-top: 36px; border: 1px solid var(--line); border-left: 3px solid var(--brand); padding: 18px 20px; background: var(--bg-alt); color: var(--ink-soft); font-size: 14px; }

/* footer */
.site-footer { background: var(--navy); color: #aeb8c4; padding: 52px 0 26px; }
.site-footer .brand { color: #fff; }
.footer__top { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 34px; }
.footer__brand p { margin-top: 12px; font-size: 13.5px; color: #8794a3; max-width: 34ch; }
.footer__col h4 { font-family: var(--font-head); font-size: 11.5px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: #fff; margin-bottom: 12px; }
.footer__col ul { list-style: none; }
.footer__col li { padding: 4px 0; }
.footer__col a { color: #aeb8c4; font-size: 13.5px; text-decoration: none; }
.footer__col a:hover { color: #fff; }
.footer__bottom { margin-top: 36px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, 0.12); display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; font-size: 12.5px; color: #7c8998; }

@media (max-width: 900px) {
  .grid--3, .steps { grid-template-columns: repeat(2, 1fr); }
  .step:nth-child(2) { border-right: none; }
  .step { border-bottom: 1px solid var(--line); }
  .split { grid-template-columns: 1fr; gap: 26px; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .section { padding: 54px 0; }
  .hero { padding: 52px 0 46px; }
  .grid--2, .grid--3, .steps, .deflist { grid-template-columns: 1fr; }
  .step, .deflist > div { border-right: none; }
  .footer__top { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }