@font-face { font-family: Nunito; font-style: normal; font-weight: 400; font-display: swap; src: url(/assets/fonts/nunito-latin-400-normal.woff2) format('woff2'); }
@font-face { font-family: Nunito; font-style: normal; font-weight: 600; font-display: swap; src: url(/assets/fonts/nunito-latin-600-normal.woff2) format('woff2'); }
@font-face { font-family: Nunito; font-style: normal; font-weight: 700; font-display: swap; src: url(/assets/fonts/nunito-latin-700-normal.woff2) format('woff2'); }
@font-face { font-family: Nunito; font-style: normal; font-weight: 800; font-display: swap; src: url(/assets/fonts/nunito-latin-800-normal.woff2) format('woff2'); }

:root {
  --bg: #fbfaf6;
  --surface: #ffffff;
  --ink: #1f2a24;
  --muted: #5d6b63;
  --line: #e3e6df;
  --green: #2f7d4f;
  --green-ink: #1f5a37;
  --green-soft: #e8f4ec;
  --sun: #f6c445;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(20, 40, 30, .06), 0 6px 20px rgba(20, 40, 30, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131815; --surface: #1b221e; --ink: #e8eee9; --muted: #a2b0a7; --line: #2c3630;
    --green: #5cc189; --green-ink: #8fdcb0; --green-soft: #1f3328; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #131815; --surface: #1b221e; --ink: #e8eee9; --muted: #a2b0a7; --line: #2c3630;
  --green: #5cc189; --green-ink: #8fdcb0; --green-soft: #1f3328; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 Nunito, system-ui, -apple-system, "Segoe UI", sans-serif; overflow-x: hidden; }
a { color: var(--green-ink); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 800; margin: .2em 0 .3em; }
h2 { font-size: 1.4rem; font-weight: 800; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; padding-top: 24px; padding-bottom: 48px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.mt { margin-top: 2rem; }

/* Header */
.site-head { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.head-row { display: flex; align-items: center; gap: 16px; min-height: 60px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 1.25rem; color: var(--ink); text-decoration: none; }
.logo svg { width: 30px; height: 30px; color: #1f3d2b; }
.logo.small { font-size: 1.1rem; }
.nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
.nav a { padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav a:hover, .nav a[aria-current] { background: var(--green-soft); color: var(--green-ink); }
.nav .nav-cta { background: var(--green); color: #fff; }
.nav .nav-cta:hover { background: var(--green-ink); color: #fff; }
@media (max-width: 760px) {
  .head-row { padding-top: 8px; padding-bottom: 8px; }
  .nav { margin-left: 0; width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .nav a { white-space: nowrap; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 16px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); color: var(--ink); font: inherit; font-weight: 700; font-size: .95rem; text-decoration: none; cursor: pointer; }
.btn:hover { border-color: var(--green); }
.btn.primary { background: var(--green); border-color: var(--green); color: #fff; }
.btn.primary:hover { background: var(--green-ink); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.big { padding: 13px 22px; font-size: 1.05rem; }
.btn:disabled { opacity: .6; cursor: default; }
.btn:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; }

/* Hero */
.hero { background: linear-gradient(180deg, var(--green-soft), var(--bg)); padding: 40px 0 24px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 62ch; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0; }
.checks { list-style: none; padding: 0; display: flex; gap: 18px; flex-wrap: wrap; color: var(--muted); font-weight: 600; }
.checks li::before { content: "✓ "; color: var(--green); font-weight: 800; }
.hero-art { height: 420px; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow); transform: rotate(1.5deg); background: #fff; }
.hero-art .ws-page { zoom: .55; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } .hero-art { display: none; } }

/* Breadcrumbs, page head, tags */
.crumbs { display: flex; gap: 8px; flex-wrap: wrap; font-size: .9rem; color: var(--muted); padding-top: 18px; }
.crumbs a { color: var(--muted); }
.page-head { margin-bottom: 18px; }
.tags { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.tags li { background: var(--green-soft); color: var(--green-ink); border-radius: 999px; padding: 3px 12px; font-size: .88rem; font-weight: 700; }

/* Cards */
.related { margin: 32px 0; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.card { display: flex; flex-direction: column; gap: 2px; padding: 14px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none; color: var(--ink); transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--green); transform: translateY(-1px); }
.card-t { font-weight: 800; }
.card-g { font-size: .85rem; color: var(--muted); }
.cards.topics .card { padding: 20px; }
.cards.topics .card-t { font-size: 1.15rem; }

/* Tool */
.tool { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; }
.tool-bar { display: flex; flex-direction: column; gap: 12px; margin-bottom: 16px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.custom summary { cursor: pointer; font-weight: 700; color: var(--green-ink); width: max-content; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-top: 12px; }
.fields label { display: flex; flex-direction: column; gap: 4px; font-size: .85rem; font-weight: 700; color: var(--muted); }
.fields .wide { grid-column: 1 / -1; }
.fields input, .fields select { font: inherit; font-size: 1rem; color: var(--ink); background: var(--bg); border: 1.5px solid var(--line); border-radius: 8px; padding: 7px 9px; width: 100%; }
.preview { --zoom: 1; background: #eceee9; border-radius: 8px; padding: 12px 0; overflow: hidden; }
.preview .sheet-wrap { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.preview .ws-page { zoom: calc(var(--zoom) * .96); box-shadow: 0 2px 10px rgba(0,0,0,.12); }
.preview .key { display: none; }

/* Content columns */
.cols { display: grid; grid-template-columns: 1fr 320px; gap: 32px; margin-top: 32px; align-items: start; }
@media (max-width: 900px) { .cols { grid-template-columns: 1fr; } }
.prose { max-width: 70ch; }
.prose li { margin: .3em 0; }
.side { position: sticky; top: 80px; }

/* Promo, packs */
.promo { background: var(--green-soft); border: 1px solid color-mix(in srgb, var(--green) 30%, transparent); border-radius: var(--radius); padding: 20px; margin: 24px 0; }
.promo h3 { margin: .2em 0 .4em; font-size: 1.2rem; }
.promo p { color: var(--muted); font-size: .95rem; }
.promo-tag { font-size: .8rem; font-weight: 800; color: var(--green-ink); text-transform: uppercase; letter-spacing: .04em; }
.packs { display: grid; gap: 20px; }
.pack { display: grid; grid-template-columns: 180px 1fr; gap: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; scroll-margin-top: 90px; }
.pack h2 { margin: 0; }
.pack-sub { color: var(--muted); font-weight: 700; margin: .2em 0 .6em; }
.pack-cover { aspect-ratio: 8.5 / 11; border-radius: 6px; background: linear-gradient(160deg, #3f9a65, #1f5a37); color: #fff; display: flex; align-items: flex-end; padding: 14px; font-weight: 800; font-size: 1.1rem; line-height: 1.2; box-shadow: var(--shadow); position: relative; }
.pack-cover::before { content: ""; position: absolute; inset: 12px 12px auto auto; width: 36px; height: 36px; border-radius: 50%; background: var(--sun); }
.pack-buy { display: flex; align-items: center; gap: 16px; margin-top: 14px; flex-wrap: wrap; }
.price { font-size: 1.6rem; font-weight: 800; }
.bundle { grid-template-columns: 1fr; margin-top: 20px; border: 2px solid var(--green); }
@media (max-width: 640px) { .pack { grid-template-columns: 1fr; } .pack-cover { max-width: 160px; } }

/* FAQ, how, signup */
.faq { margin: 40px 0; max-width: 80ch; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { font-weight: 700; cursor: pointer; }
.faq p { color: var(--muted); }
.how ol { padding-left: 1.2em; }
.signup { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 40px 0; }
.signup h3 { margin: 0 0 .3em; }
.signup p { margin: 0; color: var(--muted); font-size: .95rem; }
.signup-row { display: flex; gap: 8px; }
.signup input { flex: 1; min-width: 0; font: inherit; padding: 9px 12px; border: 1.5px solid var(--line); border-radius: 10px; background: var(--bg); color: var(--ink); }
.signup-msg { grid-column: 1 / -1; font-weight: 700; color: var(--green-ink) !important; }
.signup-msg:empty { display: none; }
.signup.done .signup-row { display: none; }
@media (max-width: 700px) { .signup { grid-template-columns: 1fr; } }

.ad { margin: 24px 0; min-height: 100px; }

/* Footer */
.site-foot { background: var(--surface); border-top: 1px solid var(--line); margin-top: 48px; padding: 32px 0 20px; font-size: .95rem; }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; }
.foot-grid h3 { font-size: .95rem; margin: 0 0 8px; }
.foot-grid a:not(.logo) { display: block; color: var(--muted); text-decoration: none; padding: 2px 0; }
.foot-grid a:hover { color: var(--green-ink); }
.foot-grid p { color: var(--muted); }
.fine { color: var(--muted); font-size: .85rem; margin-top: 16px; }
@media (max-width: 760px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-grid > div:first-child { grid-column: 1 / -1; } }

/* ===========================================================================
   Worksheet page (always black on white — it's paper)
   =========================================================================== */
.ws-page { width: 8.5in; height: 11in; padding: .5in .55in .4in; background: #fff; color: #111; display: flex; flex-direction: column; font-family: Nunito, system-ui, sans-serif; font-variant-numeric: tabular-nums; overflow: hidden; }
.ws-head { border-bottom: 2px solid #222; padding-bottom: 8px; margin-bottom: 14px; }
.ws-meta { display: flex; justify-content: space-between; gap: 16px; font-size: 14px; font-weight: 600; }
.ws-meta .line { display: inline-block; width: 2.6in; border-bottom: 1px solid #444; height: 1em; vertical-align: baseline; }
.ws-meta .line.short { width: 1.3in; }
.ws-meta .line.tiny { width: .5in; }
.key-badge { background: #c62828; color: #fff; padding: 2px 10px; border-radius: 4px; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .05em; }
.ws-head h2 { font-size: 24px; margin: 10px 0 2px; color: #111; }
.ws-head h2 small { font-size: 14px; font-weight: 600; color: #555; }
.ws-head p { margin: 0; font-size: 14px; color: #333; }
.ws-grid { flex: 1; display: grid; gap: 4px 12px; min-height: 0; }
.ws-foot { display: flex; justify-content: space-between; font-size: 10px; color: #777; border-top: 1px solid #ddd; padding-top: 4px; margin-top: 6px; }
.p { position: relative; display: flex; min-width: 0; }
.pn { position: absolute; left: 0; top: 2px; font-size: 11px; color: #777; font-weight: 600; }
.op { font-weight: 700; padding-right: 6px; }
.pv { justify-content: center; align-items: flex-start; padding-top: 6px; }
.stack { display: flex; flex-direction: column; align-items: flex-end; font-size: 24px; line-height: 1.25; font-weight: 600; letter-spacing: .04em; margin-left: 18px; }
.stack .ans { border-top: 2px solid #111; min-width: 100%; text-align: right; padding-top: 2px; }
.ph { align-items: center; padding-left: 22px; font-size: 21px; font-weight: 600; gap: 8px; white-space: nowrap; }
.blank { display: inline-block; min-width: 1.15in; border-bottom: 1.5px solid #333; text-align: center; height: 1.3em; }
.pl { padding: 8px 0 0 26px; }
.ld { display: grid; grid-template-columns: auto auto; grid-template-rows: auto auto; font-size: 22px; font-weight: 600; align-self: flex-start; letter-spacing: .06em; }
.ldq { grid-column: 2; text-align: right; padding: 0 4px 2px; min-height: 1.3em; }
.ldd { grid-column: 1; grid-row: 2; padding-right: 4px; }
.ldn { grid-column: 2; grid-row: 2; border-top: 2px solid #111; border-left: 2px solid #111; border-top-left-radius: 10px; padding: 0 6px 0 8px; }
.pc { flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.clock { width: 1.75in; height: 1.75in; }
.clock .face { fill: #fff; stroke: #111; stroke-width: 3; }
.clock .ticks line { stroke: #111; }
.clock .nums text { font: 700 19px Nunito, sans-serif; text-anchor: middle; dominant-baseline: central; fill: #111; }
.clock .hh { stroke: #111; stroke-width: 7; stroke-linecap: round; }
.clock .mh { stroke: #111; stroke-width: 4; stroke-linecap: round; }
.clock .pin { fill: #111; }
.tlabel { font-size: 22px; font-weight: 800; }
.tblank { min-width: 1.1in; font-size: 20px; font-weight: 700; }
.is-key .ans, .is-key .blank, .is-key .ldq, .is-key .tblank { color: #c62828; font-weight: 800; }
.is-key .hh, .is-key .mh { stroke: #c62828; }

/* ===========================================================================
   Print: only the worksheet (and/or key), one per page.
   =========================================================================== */
@page { size: letter; margin: 0; }
@media print {
  body { background: #fff; }
  body > *:not(main), .crumbs, .page-head, .tool-bar, .cols, .related, .faq, .signup, .promo, .ad, h2.mt, .how { display: none !important; }
  main .wrap > *:not(.tool) { display: none !important; }
  .wrap { padding: 0; max-width: none; }
  .tool { border: 0; box-shadow: none; padding: 0; background: none; }
  .preview { background: none; padding: 0; border-radius: 0; }
  .preview .ws-page { zoom: 1; box-shadow: none; break-after: page; }
  .preview .sheet-wrap { gap: 0; }
  body[data-print="sheet"] .key { display: none !important; }
  body[data-print="both"] .key { display: flex !important; }
  body[data-print="key"] .key { display: flex !important; }
  body[data-print="key"] [data-sheet] { display: none !important; }
}

/* Small-screen refinements */
.signup > *, .cols > * { min-width: 0; }
@media (max-width: 560px) {
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
  .actions .btn { padding: 9px 8px; font-size: .9rem; }
  .signup-row { flex-direction: column; }
}
.dl-files { display: grid; gap: 10px; margin: 16px 0 24px; }
.dl-btn { justify-content: flex-start; }