/* Exercise-book look: ruled paper, red margin line, serif headings, handwritten notes. Fonts are self-hosted (fonts/OFL.txt). */
@font-face { font-family: "Young Serif"; src: url(fonts/young-serif.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Public Sans"; src: url(fonts/public-sans.woff2) format("woff2"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "Caveat"; src: url(fonts/caveat.woff2) format("woff2"); font-weight: 600; font-display: swap; }

:root {
  --paper: #ffffff; --rule-line: #dfe8f4; --margin-line: #e25c5c;
  --ink: #1d2b53; --ink-2: #2f3b5c; --muted: #545e72; --pen: #c23a39;
  --card: #ffffff; --card-line: #cfd9e8; --btn: #1d2b53; --btn-ink: #ffffff;
  --shadow: rgba(29, 43, 83, 0.35);
  --rule: 36px;
  --serif: "Young Serif", Georgia, serif;
  --sans: "Public Sans", "Helvetica Neue", Helvetica, sans-serif;
  --hand: "Caveat", "Bradley Hand", "Segoe Print", cursive;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131a2e; --rule-line: #1e2843; --margin-line: #9c4646;
    --ink: #e9edf6; --ink-2: #c9d1e3; --muted: #a3adc4; --pen: #ff9d94;
    --card: #19223b; --card-line: #2e3a5a; --btn: #e9edf6; --btn-ink: #131a2e;
    --shadow: rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); font-family: var(--sans); font-size: 18px; line-height: var(--rule);
  background-color: var(--paper);
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent calc(var(--rule) - 1px), var(--rule-line) calc(var(--rule) - 1px), var(--rule-line) var(--rule));
}
a { color: var(--ink); text-decoration-color: var(--pen); text-underline-offset: 3px; }
a:hover { color: var(--pen); }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 3px; }
img { max-width: 100%; height: auto; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.margin { margin-left: min(72px, 5vw); border-left: 2px solid var(--margin-line); padding-left: min(48px, 5vw); min-height: 100vh; }

nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 24px; line-height: 1.2; color: var(--ink); text-decoration: none; }
.brand img { width: 28px; height: 28px; }
nav .links { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; font-size: 15px; line-height: 1.4; }
nav .links a:not(.btn) { color: var(--muted); text-decoration: none; }
nav .links a:not(.btn):hover { color: var(--ink); }

.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 4px; background: var(--btn); color: var(--btn-ink); font-weight: 700; font-size: 16px; line-height: 1.2; text-decoration: none; }
.btn:hover { color: var(--btn-ink); filter: brightness(1.15); }
.btn.big { min-height: 54px; padding: 0 26px; font-size: 17px; }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--ink); }
.btn.ghost:hover { color: var(--ink); background: var(--rule-line); }
.btn.soon { cursor: default; filter: none; opacity: 0.8; }
.btn.ghost.soon { opacity: 1; }

.note { margin: 0; font-family: var(--hand); font-weight: 600; font-size: 28px; line-height: var(--rule); color: var(--pen); }
kbd { font: 600 0.85em var(--sans); padding: 1px 6px; border: 1px solid var(--card-line); border-bottom-width: 2px; border-radius: 4px; background: var(--card); }

.hero { display: flex; flex-direction: column; gap: var(--rule); padding: calc(var(--rule) * 2) 0 var(--rule); }
.hero .note { transform: rotate(-1.5deg); transform-origin: left; }
.hero h1 { margin: 0; max-width: 17ch; font-family: var(--serif); font-weight: 400; font-size: clamp(46px, 8vw, 96px); line-height: 1.1; letter-spacing: -0.015em; text-wrap: balance; }
.lead { margin: 0; max-width: 660px; font-size: 21px; color: var(--ink-2); }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.cta span:not(.btn) { max-width: 420px; font-size: 15px; line-height: 1.5; color: var(--muted); }

.pinned { margin: 0; padding: var(--rule) 0 calc(var(--rule) * 2); }
.pinned img { display: block; width: 100%; transform: rotate(-1deg); border: 8px solid #ffffff; background: #ffffff; box-shadow: 0 2px 4px rgba(29, 43, 83, 0.12), 0 22px 44px -20px var(--shadow); }
.pinned figcaption { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 4px 24px; margin-top: 22px; }
.pinned figcaption .note { order: 2; font-size: 30px; transform: rotate(-2deg); }
.pinned small { font-size: 13px; line-height: 1.5; color: var(--muted); }

section { padding: 0 0 calc(var(--rule) * 2); }
section h2 { margin: 0 0 18px; font-family: var(--serif); font-weight: 400; font-size: clamp(32px, 5vw, 48px); line-height: calc(var(--rule) * 2); }
section > p { max-width: 680px; margin: 0 0 var(--rule); }
em { font-style: italic; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 24px; }
.card {
  padding: 16px 20px 20px; line-height: 32px;
  background-color: var(--card);
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent 31px, var(--rule-line) 31px, var(--rule-line) 32px);
  border: 1px solid var(--card-line); border-top: 3px solid var(--margin-line);
  box-shadow: 0 10px 20px -16px var(--shadow);
}
.card h3 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 22px; line-height: 32px; }
.card p { margin: 0; font-size: 16px; color: var(--ink-2); }

.players { list-style: none; margin: 0 0 var(--rule); padding: 0; }
.players li { display: grid; grid-template-columns: 24px minmax(0, 300px) minmax(0, 1fr); gap: 0 20px; }
.players li::before {
  content: ""; width: 22px; height: 22px; margin-top: 6px; background: var(--pen);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 13c2 1.5 4 3.5 5.5 6.5C11.5 13 16 7.5 21 4'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 13c2 1.5 4 3.5 5.5 6.5C11.5 13 16 7.5 21 4'/%3E%3C/svg%3E") center / contain no-repeat;
}
.players b { font-weight: 700; }
.players span { color: var(--muted); }

.pricing { display: flex; flex-wrap: wrap; gap: 24px; }
.plan { flex: 1 1 300px; display: flex; flex-direction: column; gap: 8px; padding: 24px 28px; line-height: 1.5; background: var(--card); border: 1px solid var(--card-line); }
.plan.pro { border: 2px solid var(--ink); }
.plan h3 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: 24px; }
.price { margin: 0; font-family: var(--serif); font-size: 56px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.price small { font-family: var(--sans); font-size: 18px; color: var(--muted); }
.plan ul { flex: 1; margin: 8px 0 16px; padding-left: 20px; color: var(--ink-2); }
.plan li { margin: 6px 0; }
.plan .btn { align-self: flex-start; }
.fine { max-width: 680px; margin: 18px 0 0; font-size: 14px; line-height: 1.5; color: var(--muted); }

.faq details { max-width: 820px; margin-bottom: 12px; padding: 12px 20px; line-height: 1.6; background: var(--card); border: 1px solid var(--card-line); }
.faq summary { cursor: pointer; font-weight: 600; padding: 6px 0; }
.faq details p { margin: 6px 0 8px; color: var(--ink-2); }

footer { display: flex; flex-wrap: wrap; gap: 12px 20px; padding: 18px 0 40px; font-size: 14px; line-height: 1.5; color: var(--muted); }
footer a { color: var(--muted); }
footer p { flex: 1 1 100%; max-width: 820px; margin: 0; }

/* Privacy and terms: a typed sheet clipped into the book. */
.doc { max-width: 780px; margin: var(--rule) 0 calc(var(--rule) * 2); padding: 32px 36px; line-height: 1.7; font-size: 17px; background: var(--card); border: 1px solid var(--card-line); box-shadow: 0 10px 20px -16px var(--shadow); }
.doc h1 { margin: 0 0 4px; font-family: var(--serif); font-weight: 400; font-size: 40px; line-height: 1.2; }
.doc h2 { margin: 32px 0 8px; font-family: var(--serif); font-weight: 400; font-size: 24px; line-height: 1.3; }
.doc .updated { margin: 0 0 24px; color: var(--muted); }
.doc li { margin: 4px 0; }
.doc .reasons { list-style: none; padding: 0; margin: 20px 0; }
.guide h1 { font-size: clamp(32px, 5vw, 44px); }
.guide ol, .guide ul { padding-left: 22px; }
.guide .btn { margin-right: 12px; }
.fine-inline { font-size: 15px; color: var(--muted); }
.sources { font-size: 15px; }
.doc .reasons li { margin: 10px 0; }
.doc .reasons a { display: flex; align-items: center; min-height: 48px; padding: 8px 16px; border: 1px solid var(--card-line); border-left: 3px solid var(--margin-line); text-decoration: none; }
.doc .reasons a:hover { background: var(--rule-line); color: var(--ink); }

@media (max-width: 720px) {
  :root { --rule: 32px; }
  body { font-size: 17px; }
  nav .links a.hide-sm { display: none; }
  .lead { font-size: 19px; }
  section h2 { line-height: calc(var(--rule) * 1.5); }
  .players li { grid-template-columns: 24px minmax(0, 1fr); margin-bottom: 8px; }
  .players li span { grid-column: 2; }
  .doc { padding: 22px 18px; }
  .price { font-size: 46px; }
}