/* Shared by the public guide library and articles. Keep study-app styles separate. */
:root {
  color-scheme: light;
  --paper: #fff;
  --ink: #3d4651;
  --ink-2: #657080;
  --ink-3: #657080;
  --guide-brand: #1cb0f6;
  --guide-blue: #0878c7;
  --guide-blue-lip: #0797d3;
  --guide-line: #e3e8ed;
  --guide-soft: #eff9ff;
}
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { background: #fff; color: var(--ink); }
.wrap { max-width: none; padding: 0; }
.guide-site { font-family: Nunito, system-ui, sans-serif; }
.guide-site h1, .guide-site h2, .guide-site h3 { color: var(--ink); font-weight: 900; letter-spacing: -.025em; }
.guide-site a { text-underline-offset: 4px; }
.guide-site :where(a, summary):focus-visible { outline: 3px solid #c77300; outline-offset: 5px; }
.guide-container, .guide-header-inner { width: min(1060px, calc(100% - 64px)); margin-inline: auto; }
.guide-skip { position: fixed; z-index: 30; top: 10px; left: 16px; padding: 12px 20px; border: 2px solid var(--guide-blue); border-radius: 12px; background: #fff; transform: translateY(-160%); }
.guide-skip:focus { transform: none; }
.guide-header { position: sticky; top: 0; z-index: 10; border-bottom: 2px solid var(--guide-line); background: #fff; }
.guide-header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.guide-wordmark { color: var(--guide-brand); font: 700 34px/1 Fredoka, Nunito, sans-serif; text-decoration: none; letter-spacing: -.7px; }
.guide-header nav { display: flex; align-items: center; gap: 30px; }
.guide-nav-current { font-size: 16px; font-weight: 900; color: var(--guide-blue); text-decoration: none; }
.guide-button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 12px 23px; margin-bottom: 5px; border: 0; border-radius: 14px; background: var(--guide-brand); color: #fff; box-shadow: 0 5px 0 var(--guide-blue-lip); font-size: 17px; font-weight: 900; line-height: 1.3; text-align: center; text-decoration: none; transition: transform .12s ease-out, box-shadow .12s ease-out; }
@media (hover: hover) and (pointer: fine) {
  .guide-button:hover { transform: translateY(5px); box-shadow: none; }
}
.guide-button:focus-visible { transform: translateY(5px); box-shadow: none; }
.guide-button:active { transform: translateY(5px); box-shadow: none; }
.guide-hero { display: grid; grid-template-columns: 1.35fr 1fr; align-items: center; gap: 46px; padding: 52px 20px 42px; }
.guide-hero h1 { margin: 0 0 22px; font-size: clamp(38px, 4.8vw, 58px); line-height: 1.08; letter-spacing: -.04em; }
.guide-hero p { max-width: 43ch; margin-bottom: 22px; font-size: 20px; line-height: 1.65; }
.guide-hero-corgi { width: 100%; max-width: 340px; height: auto; justify-self: center; }
.guide-free-note { display: inline-flex; align-items: center; gap: 10px; color: #587146; font-weight: 800; font-size: 15px; }
.guide-free-note svg { width: 22px; height: 22px; flex-shrink: 0; }
.guide-library { padding-top: 25px; border-top: 2px solid var(--guide-line); }
.guide-section-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.guide-section-heading h2 { margin: 0; font-size: 25px; line-height: 1.25; }
.guide-section-heading > span { color: var(--ink-2); font-size: 15px; font-weight: 800; white-space: nowrap; }
.guide-section-heading > a { color: var(--guide-blue); font-weight: 900; white-space: nowrap; }
.guide-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; padding: 0; margin: 0; list-style: none; }
.guide-grid > li { display: flex; min-width: 0; margin: 0; }
.guide-card, .guide-practice-card { width: 100%; padding: 25px; border: 2px solid var(--guide-line); border-radius: 22px; box-shadow: 0 4px 0 var(--guide-line); }
.guide-card { display: flex; flex-direction: column; text-decoration: none; transition: border-color .12s, box-shadow .12s, transform .12s; }
.guide-card:hover { border-color: #97d7f7; box-shadow: 0 4px 0 #97d7f7; }
.guide-card:active { transform: translateY(4px); box-shadow: none; }
.guide-card-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.guide-icon { display: inline-flex; align-items: center; justify-content: center; width: 60px; height: 60px; flex-shrink: 0; border-radius: 18px; box-shadow: inset 0 -4px 0 #0000000d; }
.guide-icon svg { width: 32px; height: 32px; }
.guide-icon--blue { background: #ddf3ff; color: #097abd; }
.guide-icon--purple { background: #f0e6ff; color: #9356c6; }
.guide-icon--green { background: #e8f5cf; color: #668e24; }
.guide-icon--pink { background: #ffe5ed; color: #d9567a; }
.guide-icon--gold { background: #fff2c7; color: #a77706; }
.guide-reading-time { color: var(--ink-2); font-size: 13px; font-weight: 800; }
.guide-card h3, .guide-practice-card h3 { margin: 0 0 12px; font-size: 22px; line-height: 1.25; }
.guide-card p, .guide-practice-card p { font-size: 16px; line-height: 1.6; margin-bottom: 24px; }
.guide-card-action { display: flex; align-items: center; justify-content: space-between; gap: 14px; color: var(--guide-blue); font-size: 16px; font-weight: 900; margin-top: auto; }
.guide-card-action svg { width: 23px; height: 23px; }
.guide-practice-card { display: flex; flex-direction: column; align-items: flex-start; background: var(--guide-soft); border-color: #d3ebfa; box-shadow: 0 4px 0 #d3ebfa; }
.guide-practice-card > .guide-icon { margin-bottom: 22px; background: #fff; }
.guide-practice-card .guide-button { width: 100%; margin-top: auto; }
.guide-independent { max-width: 72ch; margin: 40px auto 30px; font-size: 13px; line-height: 1.7; text-align: center; }
.site-footer { border-top: 2px solid var(--guide-line); padding: 26px 24px 34px; gap: 16px 28px; color: var(--ink-2); }
.site-footer a { text-decoration: none; text-underline-offset: 4px; }
.site-footer a:hover { text-decoration: underline; }

/* The reading view keeps the article open and quiet, with navigation beside it. */
.guide-breadcrumb { margin: 36px 0 30px; }
.guide-breadcrumb a { display: inline-flex; align-items: center; gap: 10px; min-height: 32px; font-weight: 900; font-size: 16px; color: var(--guide-blue); text-decoration: none; }
.guide-breadcrumb svg { width: 21px; height: 21px; transform: rotate(180deg); }
.guide-article-header { max-width: 890px; padding-bottom: 35px; }
.guide-article-header > .guide-icon { margin-bottom: 24px; }
.guide-article-header h1 { font-size: clamp(32px, 4vw, 47px); line-height: 1.15; margin: 0 0 22px; text-wrap: balance; }
.guide-description { max-width: 66ch; font-size: 20px; line-height: 1.65; margin-bottom: 22px; }
.guide-byline { display: flex; flex-wrap: wrap; gap: 8px 20px; color: var(--ink-2); font-size: 13px; font-weight: 700; }
.guide-byline > span:first-child { color: var(--guide-blue); font-weight: 900; }
.guide-reading-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; align-items: start; gap: 64px; border-top: 2px solid var(--guide-line); padding-top: 36px; }
.guide-sidebar { grid-column: 2; grid-row: 1; position: sticky; top: 116px; }
.guide-contents { padding: 22px; border: 2px solid var(--guide-line); border-radius: 18px; }
.guide-contents summary { cursor: pointer; font-size: 18px; font-weight: 900; color: var(--ink); }
.guide-contents ol { padding-left: 21px; margin: 18px 0 0; }
.guide-contents li { padding-left: 4px; margin-bottom: 14px; font-size: 14px; font-weight: 700; color: var(--ink-2); }
.guide-contents li:last-child { margin-bottom: 0; }
.guide-contents a { color: var(--ink-2); text-decoration: none; }
.guide-contents a:hover { color: var(--guide-blue); text-decoration: underline; }
.guide-sidebar-practice { padding: 24px 4px; }
.guide-sidebar-practice h2 { margin: 0 0 10px; font-size: 22px; line-height: 1.3; }
.guide-sidebar-practice p { font-size: 15px; line-height: 1.6; }
.guide-sidebar-practice .guide-button { width: 100%; font-size: 16px; }
.guide-article-body { grid-column: 1; grid-row: 1; min-width: 0; }
.guide-article-section { margin-bottom: 36px; }
.guide-article-section h2 { margin: 0 0 16px; font-size: 27px; line-height: 1.25; }
.guide-article-section p { margin: 0; font-size: 18px; line-height: 1.85; }
.guide-sources { background: #f7fafc; border: 2px solid var(--guide-line); padding: 24px; border-radius: 18px; }
.guide-sources h2 { margin: 0 0 10px; font-size: 23px; }
.guide-sources p, .guide-sources li { font-size: 15px; line-height: 1.7; }
.guide-sources ul { margin: 0; padding-left: 20px; }
.guide-sources li:last-child { margin-bottom: 0; }
.guide-sources a { color: var(--guide-blue); font-weight: 800; overflow-wrap: anywhere; }
.guide-finish { margin-top: 32px; padding: 30px; border: 2px solid #d3ebfa; border-radius: 22px; background: var(--guide-soft); text-align: center; }
.guide-finish h2 { font-size: 25px; line-height: 1.3; margin: 0 0 12px; }
.guide-finish p { margin-bottom: 22px; font-size: 16px; }
.guide-related { margin-top: 60px; padding-top: 34px; border-top: 2px solid var(--guide-line); }

@media (max-width: 950px) {
  .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guide-hero { gap: 25px; padding-inline: 0; }
  .guide-reading-layout { grid-template-columns: minmax(0, 1fr) 240px; gap: 32px; }
  .guide-header nav { gap: 20px; }
}
@media (max-width: 720px) {
  .guide-container, .guide-header-inner { width: calc(100% - 40px); }
  .guide-header-inner { min-height: 78px; gap: 16px; }
  .guide-wordmark { font-size: 28px; }
  .guide-nav-current { display: none; }
  .guide-header .guide-button { font-size: 14px; min-height: 42px; padding: 10px 14px; border-radius: 12px; }
  .guide-hero { grid-template-columns: 1fr 180px; padding: 34px 0; gap: 12px; }
  .guide-hero h1 { font-size: 37px; }
  .guide-hero p { font-size: 17px; }
  .guide-section-heading h2 { font-size: 22px; }
  .guide-card, .guide-practice-card { padding: 22px; }
  .guide-reading-layout { display: flex; flex-direction: column; gap: 30px; padding-top: 26px; }
  .guide-sidebar { position: static; width: 100%; }
  .guide-sidebar-practice { display: none; }
  .guide-article-body { width: 100%; }
  .guide-description { font-size: 18px; }
  .guide-breadcrumb { margin: 24px 0; }
  .guide-related { margin-top: 36px; }
}
@media (max-width: 520px) {
  .guide-header-inner { gap: 10px; }
  .guide-wordmark { font-size: 25px; }
  .guide-hero { grid-template-columns: 1fr; text-align: center; gap: 8px; padding: 24px 0 30px; }
  .guide-hero-corgi { grid-row: 1; width: 175px; }
  .guide-hero h1 { font-size: 37px; margin-bottom: 16px; }
  .guide-hero p { margin-bottom: 18px; }
  .guide-free-note { font-size: 14px; }
  .guide-section-heading { align-items: flex-start; gap: 12px; }
  .guide-section-heading h2 { font-size: 21px; }
  .guide-section-heading > span { font-size: 12px; padding-top: 4px; }
  .guide-grid { grid-template-columns: 1fr; gap: 18px; }
  .guide-card-top { margin-bottom: 18px; }
  .guide-card h3 { font-size: 23px; }
  .guide-article-header h1 { font-size: 33px; }
  .guide-article-header > .guide-icon { width: 54px; height: 54px; margin-bottom: 18px; }
  .guide-article-section h2 { font-size: 25px; }
  .guide-article-section p { font-size: 17px; line-height: 1.8; }
  .guide-finish, .guide-sources { padding: 22px; }
  .guide-finish .guide-button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .guide-card, .guide-button { transition: none; }
  .guide-button:is(:hover, :focus-visible, :active) { transform: none; }
}