/* gemdasworksheet.com — screen + print styles. Zero external resources. */
:root {
  --ink: #16233b;
  --ink-soft: #4a5872;
  --paper: #ffffff;
  --paper-soft: #f4f6fb;
  --line: #dfe4ef;
  --brand: #1d4ed8;
  --brand-deep: #16307a;
  --accent: #b45309;
  --good: #047857;
  --radius: 10px;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}
.wrap { max-width: 1020px; margin: 0 auto; padding: 0 20px; }
a { color: var(--brand); }
a:hover { color: var(--brand-deep); }
.skip {
  position: absolute; left: -9999px; top: 0; background: var(--ink); color: #fff;
  padding: 8px 14px; z-index: 99; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* header */
.site-header { border-bottom: 1px solid var(--line); background: #fff; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 20px; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 1.12rem; color: var(--ink); text-decoration: none; letter-spacing: .2px; }
.logo .glyph { color: var(--brand); font-weight: 900; }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; font-size: .95rem; }
.main-nav a { text-decoration: none; color: var(--ink-soft); padding: 6px 10px; border-radius: 8px; }
.main-nav a:hover { background: var(--paper-soft); color: var(--ink); }
.main-nav a[aria-current="page"] { color: var(--brand); font-weight: 700; }

/* hero */
.hero { background: linear-gradient(180deg, #eef2fc 0%, #ffffff 100%); border-bottom: 1px solid var(--line); padding: 44px 0 40px; }
.hero h1 { margin: 6px 0 10px; font-size: clamp(1.7rem, 4vw, 2.5rem); line-height: 1.2; }
.hero p { margin: 8px 0; color: var(--ink-soft); max-width: 720px; }
.kicker { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--accent); }

/* content */
main { padding: 34px 0 46px; }
main section { margin: 0 0 34px; }
h2 { font-size: 1.45rem; margin: 0 0 12px; }
h3 { font-size: 1.12rem; margin: 22px 0 8px; }
.intro { font-size: 1.06rem; }
.cols2 { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
@media (max-width: 780px) { .cols2 { grid-template-columns: 1fr; } }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px; background: #fff; }
.card h3 { margin-top: 0; }
.note { background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius); padding: 12px 16px; font-size: .95rem; }

/* tables */
table.teach { border-collapse: collapse; width: 100%; font-size: .97rem; }
table.teach th, table.teach td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
table.teach th { background: var(--paper-soft); }

/* step-by-step worked examples */
.steps { border-left: 3px solid var(--brand); background: var(--paper-soft); border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; margin: 14px 0; }
.steps .step { display: block; margin: 4px 0; font-family: var(--serif); font-size: 1.05rem; }
.steps .why { color: var(--ink-soft); font-family: var(--sans); font-size: .88rem; }
code.expr { font-family: var(--serif); background: var(--paper-soft); padding: 1px 6px; border-radius: 6px; white-space: nowrap; }

/* FAQ */
details.faq-item { border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 16px; margin: 8px 0; background: #fff; }
details.faq-item summary { cursor: pointer; font-weight: 700; }
details.faq-item[open] summary { color: var(--brand); }

/* link grids */
.grid-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; list-style: none; padding: 0; margin: 0; }
.grid-links li { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; }
.grid-links a { text-decoration: none; font-weight: 600; display: block; }
.grid-links small { color: var(--ink-soft); display: block; margin-top: 3px; font-weight: 400; }

/* footer */
.site-footer { border-top: 1px solid var(--line); background: var(--paper-soft); padding: 30px 0 40px; margin-top: 20px; }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
@media (max-width: 780px) { .site-footer .cols { grid-template-columns: 1fr 1fr; } }
.site-footer ul { list-style: none; padding: 0; margin: 6px 0 0; }
.site-footer li { margin: 4px 0; }
.site-footer a { text-decoration: none; color: var(--ink-soft); }
.site-footer a:hover { color: var(--brand); }
.footer-note { color: var(--ink-soft); font-size: .92rem; margin-top: 8px; }
.copyright { margin-top: 22px; color: var(--ink-soft); font-size: .85rem; }

/* ============ generator widget ============ */
.gw-root { border: 2px solid var(--brand); border-radius: 14px; padding: 20px; background: #fff; margin: 18px 0; }
.gw-controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; }
.gw-field { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; font-weight: 700; color: var(--ink-soft); }
.gw-field select, .gw-field input {
  font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: #fff; min-width: 120px;
}
.gw-btn {
  font: inherit; font-weight: 700; cursor: pointer; border-radius: 999px; padding: 10px 20px; border: none;
  background: var(--brand); color: #fff;
}
.gw-btn:hover { background: var(--brand-deep); }
.gw-btn.gw-toggle, .gw-btn.gw-print { background: #fff; color: var(--brand); border: 2px solid var(--brand); }
.gw-btn.gw-toggle:hover, .gw-btn.gw-print:hover { background: var(--paper-soft); }
.gw-status { font-size: .9rem; color: var(--ink-soft); margin: 12px 0 4px; }
.gw-toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin: 12px 0; }

/* on-screen worksheet preview */
.gw-sheet, .static-sheet { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; background: #fff; }
.gw-sheet-title { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; text-align: center; }
.gw-sheet-meta { display: flex; gap: 22px; justify-content: center; flex-wrap: wrap; margin: 8px 0 4px; font-size: .95rem; }
.gw-sheet-hint { font-size: .9rem; color: var(--ink-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 8px 0; }
ol.gw-questions { columns: 2; column-gap: 40px; margin: 14px 0 0; padding-left: 26px; font-family: var(--serif); font-size: 1.08rem; }
ol.gw-questions li { margin: 0 0 16px; break-inside: avoid; }
.gw-q-ans { font-weight: 700; color: var(--good); margin-left: 8px; }
.gw-key { margin-top: 18px; }
.gw-key-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 26px; margin-top: 10px; font-family: var(--serif); }
.gw-key-cell { border-bottom: 1px dotted var(--line); padding: 3px 0; }
.gw-key-n { display: inline-block; min-width: 2em; font-weight: 700; }
.gw-key-v { color: var(--ink); }
.gw-preview .gw-key { border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 20px; }

/* static sample sheet (grade 6 page) */
.static-sheet ol { columns: 2; column-gap: 40px; font-family: var(--serif); font-size: 1.08rem; padding-left: 26px; }
.static-sheet ol li { margin: 0 0 14px; break-inside: avoid; }
.sample-key { margin-top: 14px; }

/* print zones live directly under <body>, hidden on screen */
.gw-print-zone { display: none; }

/* ============ print ============ */
@page { size: A4; margin: 14mm 12mm; }
@media print {
  body { background: #fff; }
  .site-header, .site-footer, .hero .kicker, .gw-controls, .gw-status, .gw-toolbar, .skip { display: none !important; }
  main { padding: 0; }
  body[class*="gw-mode-"] > * { display: none !important; }
  body.gw-mode-worksheet > .gw-print-zone.gw-print-worksheet,
  body.gw-mode-key > .gw-print-zone.gw-print-key,
  body.gw-mode-sample > .gw-print-zone.gw-print-sample { display: block !important; }

  .gw-print-zone .gw-sheet, .gw-print-zone .static-sheet, .gw-print-zone .gw-key {
    border: none; padding: 0; font-family: var(--serif);
  }
  .gw-print-zone .gw-sheet-title { font-size: 14pt; }
  .gw-print-zone .gw-sheet-meta { font-size: 11pt; margin-bottom: 6mm; }
  .gw-print-zone .gw-sheet-hint { font-size: 9.5pt; color: #333; }
  .gw-print-zone ol.gw-questions, .gw-print-zone .static-sheet ol { columns: 2; font-size: 11.5pt; }
  .gw-print-zone ol.gw-questions li { margin-bottom: 7mm; }
  .gw-print-zone .gw-key-grid { grid-template-columns: 1fr 1fr; font-size: 10.5pt; }
  .gw-print-zone .gw-q-ans { color: #000; }
  a { color: inherit; text-decoration: none; }
}