/* PrinterMath, ink + paper + a single cyan accent. See BRAND.md. */

:root {
  --ink: #1a1a1a;
  --paper: #f7f7f4;
  --panel: #ffffff;
  --ticket: #fcfcfa;
  --cyan: #0090c8;
  --cyan-deep: #0a6e96;
  --cyan-dark: #075a7c;
  --steel: #5a6470;
  --line: #d9d9d2;
  --ok: #1e7a46;
  --warn: #b25a00;

  --sans: "Space Grotesk", system-ui, -apple-system, sans-serif;
  --body: "Inter", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --wrap: 880px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
}

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

a { color: var(--cyan-deep); }
a:hover { color: var(--cyan-dark); }

/* Skip link — hidden until a keyboard user tabs to it (WCAG 2.4.1). */
.skip-link {
  position: absolute; left: 8px; top: -48px; z-index: 100;
  background: var(--ink); color: #fff; padding: 8px 14px;
  border-radius: 6px; text-decoration: none; font-weight: 600;
  transition: top .15s ease;
}
.skip-link:focus { top: 8px; color: #fff; outline: 3px solid var(--cyan); }

/* Visible keyboard focus ring on every interactive element (WCAG 2.4.7).
   :focus-visible keeps it keyboard-only, so mouse clicks stay clean. */
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--cyan); outline-offset: 2px; border-radius: 3px;
}

h1, h2, h3 { font-family: var(--sans); font-weight: 700; line-height: 1.15; }
h1 { font-size: 2rem; margin: 0 0 .4rem; }
h2 { font-size: 1.4rem; margin: 2.2rem 0 .8rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 .5rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 .4rem;
}

/* ---- Header / footer ------------------------------------------------ */
.site-header {
  background: var(--ink);
  color: #fff;
  border-bottom: 3px solid var(--cyan);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 24px;
  height: 60px;
}
.brand { display: flex; align-items: center; gap: 9px; text-decoration: none; }
.brand .mark { width: 24px; height: 28px; flex: none; }
.wordmark {
  font-family: var(--sans); font-weight: 700; font-size: 1.25rem;
  letter-spacing: .01em; color: #fff;
}
.wordmark b { color: var(--cyan); font-weight: 700; }
.nav { margin-left: auto; display: flex; gap: 18px; flex-wrap: wrap; }
.nav a {
  color: #d6d6d2; text-decoration: none; font-family: var(--sans);
  font-weight: 600; font-size: .9rem;
}
.nav a:hover, .nav a[aria-current] { color: var(--cyan); }

.site-footer {
  background: var(--ink); color: #b8b8b2; margin-top: 64px;
  padding: 32px 0; font-size: .85rem;
}
.site-footer a { color: #d6d6d2; }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 24px 40px; }

main { padding: 32px 0 8px; }
.lede { font-size: 1.08rem; color: #333; }

.crumbs { font-family: var(--mono); font-size: .76rem; color: var(--steel); margin: 0 0 10px; }
.crumbs a { color: var(--steel); text-decoration: none; }
.crumbs a:hover { color: var(--cyan-deep); }
.crumbs .sep { opacity: .5; margin: 0 2px; }
.crumbs [aria-current] { color: var(--ink); }

/* ---- Input grid ----------------------------------------------------- */
.calc-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 10px; padding: 20px; margin: 18px 0;
}
.input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 18px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field.full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .9rem; }
.field .unit { color: var(--steel); font-weight: 400; }
.input-row { display: flex; align-items: stretch; }
.field input[type="number"], .field input[type="text"], .field select {
  font-family: var(--mono); font-size: 1rem;
  padding: 9px 10px; border: 1px solid var(--line); border-radius: 7px;
  background: #fff; color: var(--ink); width: 100%;
}
.field input:focus, .field select:focus {
  outline: 2px solid var(--cyan); outline-offset: 0; border-color: var(--cyan);
}
.field .hint { font-size: .78rem; color: var(--steel); margin: 0; }
.toggle { display: flex; align-items: center; gap: 8px; }
.toggle input { width: 18px; height: 18px; accent-color: var(--cyan); }

/* ---- Result card (quote stub) -------------------------------------- */
.ticket {
  background: var(--ticket); border: 1px solid var(--line);
  border-radius: 10px; padding: 0; margin: 22px 0; overflow: hidden;
  position: relative;
}
.ticket::before {
  /* perforated top edge */
  content: ""; display: block; height: 8px;
  background: radial-gradient(circle at 6px 8px, transparent 3px, var(--ticket) 3.5px) 0 0/12px 8px repeat-x;
  border-bottom: 1px dashed var(--line);
}
.ticket-body { padding: 20px 22px 22px; }
/* Reserve space for the result so populating it doesn't shift the page (CLS). */
#pm-result { min-height: 92px; }
.ticket-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--steel); margin-bottom: 10px;
}
.stamp {
  font-family: var(--mono); font-weight: 600; font-size: .68rem;
  color: var(--cyan-dark); border: 1.5px solid var(--cyan-dark);
  border-radius: 4px; padding: 2px 7px; transform: rotate(-3deg);
}
.headline {
  font-family: var(--mono); font-weight: 600;
  font-size: 2.6rem; line-height: 1.05; letter-spacing: -.01em;
  color: var(--ink);
}
.headline .u { font-size: 1rem; color: var(--steel); margin-left: .35rem; }
.headline .sep { color: var(--cyan); }
.subline { font-family: var(--mono); color: var(--steel); margin: 4px 0 0; }

.lines { width: 100%; border-collapse: collapse; margin: 16px 0 4px;
  font-family: var(--mono); font-size: .9rem; }
.lines td { padding: 5px 0; border-bottom: 1px solid var(--line); }
.lines td:last-child { text-align: right; }
.lines tr:last-child td { border-bottom: none; }
.lines .total td { font-weight: 600; border-top: 2px solid var(--ink); border-bottom: none; }

/* compare layout: two stubs */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 8px 0; }
.compare .col {
  border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; background: #fff;
}
.compare .col.win { border-color: var(--cyan); box-shadow: inset 0 0 0 1px var(--cyan); }
.compare .col .name { font-family: var(--mono); font-size: .8rem; color: var(--steel); text-transform: uppercase; letter-spacing: .08em; }
.compare .col .amt { font-family: var(--mono); font-size: 1.5rem; font-weight: 600; }
.verdict { font-family: var(--mono); font-size: .95rem; margin: 6px 0 0; }
.verdict b { color: var(--cyan-dark); }

.formula {
  font-family: var(--mono); font-size: .82rem; color: var(--steel);
  background: #f1f1ec; border-radius: 6px; padding: 8px 10px; margin: 12px 0 0;
  white-space: pre-wrap;
}
.caveat { font-size: .82rem; color: var(--steel); margin: 10px 0 0; }
.print-attr { display: none; }

/* ---- CTA ------------------------------------------------------------ */
.btn {
  font-family: var(--sans); font-weight: 600; font-size: .98rem;
  background: var(--cyan); color: #fff; border: none; border-radius: 8px;
  padding: 11px 18px; cursor: pointer; text-decoration: none; display: inline-block;
}
.btn:hover { background: var(--cyan-dark); color: #fff; }
.btn.ghost { background: transparent; color: var(--cyan-deep); border: 1.5px solid var(--line); }

.cta {
  margin: 16px 0 0; padding: 16px 18px; border-radius: 9px;
  background: var(--ink); color: #eee;
}
.cta.hot { background: var(--ink); }
.cta.cool { background: #eef4f6; color: var(--ink); border: 1px solid var(--line); }
.cta p { margin: 0 0 10px; }

/* lead form */
.lead-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 10px 0; }
.lead-grid .field label { color: inherit; }
.lead-grid input, .lead-grid select {
  font-family: var(--mono); padding: 9px 10px; border: 1px solid var(--line);
  border-radius: 7px; width: 100%;
}
.lead-hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
.lead-msg { color: #ffd1d1; font-size: .85rem; }
.cta.cool .lead-msg { color: var(--warn); }
.lead-fine { font-size: .72rem; opacity: .8; }
.lead-success { font-family: var(--mono); }

/* ---- Hub ------------------------------------------------------------ */
.group { margin: 28px 0; }
.group[hidden] { display: none; }
.group h2 { display: flex; align-items: baseline; gap: 10px; }
.group-n {
  font-family: var(--mono); font-size: .7rem; font-weight: 500;
  color: var(--steel); background: var(--ticket);
  border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px;
}
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.tool-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--panel); border: 1px solid var(--line); border-radius: 9px;
  padding: 14px 16px; transition: border-color .12s, box-shadow .12s, transform .12s;
}
.tool-card[hidden] { display: none; }
.tool-card:hover {
  border-color: var(--cyan);
  box-shadow: 0 2px 10px rgba(0,144,200,.10);
  transform: translateY(-1px);
}
.tool-card .t { font-family: var(--sans); font-weight: 600; }
.tool-card .d { font-size: .85rem; color: var(--steel); margin-top: 3px; }

/* ---- Hub search + filter ------------------------------------------- */
.calc-search-bar {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin: 18px 0 6px; padding: 10px 0;
  background: linear-gradient(var(--paper) 80%, rgba(247,247,244,0));
}
.search-field {
  position: relative; flex: 1 1 260px; min-width: 220px;
  display: flex; align-items: center;
}
.search-icon {
  position: absolute; left: 13px; width: 18px; height: 18px;
  fill: none; stroke: var(--steel); stroke-width: 2; stroke-linecap: round;
  pointer-events: none;
}
#calc-search {
  width: 100%; font-family: var(--body); font-size: 1rem; color: var(--ink);
  padding: 11px 38px 11px 40px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 9px;
  -webkit-appearance: none; appearance: none;
}
#calc-search::-webkit-search-cancel-button { display: none; }
#calc-search:focus {
  outline: none; border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,144,200,.15);
}
#calc-search::placeholder { color: var(--steel); }
.search-clear {
  position: absolute; right: 8px; display: flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; padding: 0; font-size: 1.3rem; line-height: 1;
  color: var(--steel); background: none; border: 0; border-radius: 6px; cursor: pointer;
}
.search-clear:hover { color: var(--ink); background: var(--ticket); }
.calc-count { font-family: var(--mono); font-size: .8rem; color: var(--steel); white-space: nowrap; }
.cat-pills { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.cat-pill {
  font-family: var(--sans); font-size: .82rem; font-weight: 500; color: var(--steel);
  background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 13px; cursor: pointer; transition: all .12s;
}
.cat-pill:hover { border-color: var(--cyan); color: var(--ink); }
.cat-pill.active {
  color: #fff; background: var(--cyan-deep); border-color: var(--cyan-deep);
}
.calc-empty { margin: 28px 0; color: var(--steel); }
.linkish {
  font: inherit; color: var(--cyan-deep); background: none; border: 0; padding: 0;
  cursor: pointer; text-decoration: underline;
}
.linkish:hover { color: var(--cyan-dark); }

/* ---- Local pages: services grid ----------------------------------- */
.svc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; margin: 8px 0 4px; }
.svc { background: var(--panel); border: 1px solid var(--line); border-radius: 9px; padding: 16px 18px; }
.svc h3 { margin: 0 0 6px; font-size: 1.05rem; }
.svc p { margin: 0 0 8px; font-size: .92rem; color: #333; }
.svc-links { font-family: var(--mono); font-size: .8rem; color: var(--steel); }

/* ---- Tables / prose ------------------------------------------------- */
.prose { max-width: 70ch; }
.prose table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: .92rem; }
.prose th, .prose td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
.prose th { font-family: var(--mono); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--steel); }
.prose td.num, .prose th.num { text-align: right; font-family: var(--mono); }
.faq h3 { margin-bottom: .2rem; }
.faq p { margin-top: 0; color: #333; }

/* ---- Quiz ----------------------------------------------------------- */
.quiz-step { display: none; }
.quiz-step.active { display: block; }
.quiz-opts { display: grid; gap: 10px; margin: 14px 0; }
.quiz-opts button {
  text-align: left; font-family: var(--body); font-size: 1rem;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 14px; cursor: pointer;
}
.quiz-opts button:hover, .quiz-opts button[aria-pressed="true"] { border-color: var(--cyan); }
.quiz-progress { font-family: var(--mono); font-size: .78rem; color: var(--steel); }

/* ---- Toner finder --------------------------------------------------- */
.finder { position: relative; max-width: 480px; }
.finder input { width: 100%; font-family: var(--mono); padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 1.05rem; }
.finder ul { list-style: none; margin: 4px 0 0; padding: 0; position: absolute;
  width: 100%; background: #fff; border: 1px solid var(--line); border-radius: 8px;
  z-index: 5; max-height: 280px; overflow: auto; }
.finder li a { display: block; padding: 9px 14px; text-decoration: none; color: var(--ink); }
.finder li a:hover { background: #eef4f6; }

@media (max-width: 620px) {
  .input-grid, .lead-grid, .compare { grid-template-columns: 1fr; }
  .headline { font-size: 2.1rem; }
  h1 { font-size: 1.6rem; }
  /* Header: let the nav drop to its own line instead of overflowing the
     fixed 60px bar and colliding with the page content. */
  .site-header .wrap {
    height: auto; flex-wrap: wrap; align-items: center;
    gap: 4px 16px; padding-top: 10px; padding-bottom: 10px;
  }
  .nav { width: 100%; margin-left: 0; gap: 10px 16px; }
  /* Search bar stacks above its count on narrow screens. */
  .calc-search-bar { gap: 8px; }
  .calc-count { width: 100%; }
}

/* ---- "Further reading" guide link on calculators ------------------- */
.read-next {
  margin: 22px 0 0; padding: 12px 16px; border-left: 3px solid var(--cyan);
  background: var(--panel); border-radius: 0 8px 8px 0; font-size: .92rem;
}
.read-next span {
  display: block; font-family: var(--mono); font-size: .68rem;
  text-transform: uppercase; letter-spacing: .05em; color: var(--steel); margin-bottom: 2px;
}

/* ---- Guide table of contents --------------------------------------- */
.toc {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 14px 18px; margin: 20px 0;
}
.toc-h {
  font-family: var(--mono); font-size: .72rem; text-transform: uppercase;
  letter-spacing: .04em; color: var(--steel); margin: 0 0 8px;
}
.toc ol { margin: 0; padding-left: 20px; }
.toc li { margin: 3px 0; }
.prose h2[id] { scroll-margin-top: 80px; }

/* ---- Glossary ------------------------------------------------------- */
.glossary { margin: 4px 0 0; }
.glossary dt {
  font-weight: 600; color: var(--ink); margin-top: 20px; scroll-margin-top: 80px;
}
.glossary dt:first-child { margin-top: 0; }
.glossary dd { margin: 4px 0 0; color: var(--steel); }
.glossary dd a { color: var(--cyan-deep); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important; scroll-behavior: auto !important;
  }
}

@media print {
  .site-header, .site-footer, .cta, .nav, form { display: none !important; }
  .ticket { border: 1px solid #000; }
  .print-attr { display: block; font-family: var(--mono); font-size: .7rem; color: #444; margin-top: 10px; }
}