.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
.reading-progress { position: fixed; z-index: 200; inset: 0 auto auto 0; width: 0; height: 3px; background: var(--primary); box-shadow: 0 0 14px rgba(96, 165, 250, .7); }
.guide-hero { padding-block: 96px 74px; text-align: center; }
.guide-hero h1 { margin: 18px 0 12px; font-size: clamp(48px, 7vw, 76px); line-height: 1; letter-spacing: -.055em; }
.guide-hero > p { color: var(--muted); font-size: 17px; }
.guide-search { width: min(720px, 100%); min-height: 66px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 14px; margin: 30px auto 0; padding: 0 16px 0 20px; border: 1px solid var(--line); border-radius: 17px; background: var(--surface); box-shadow: 0 20px 48px rgba(2, 6, 23, .26); text-align: left; transition: border-color .2s, box-shadow .2s; }
.guide-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(96, 165, 250, .11), 0 20px 48px rgba(2, 6, 23, .26); }
.guide-search > .material-symbols-rounded { color: var(--primary); font-size: 26px; }.guide-search input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--text); font-size: 15px; }.guide-search input::placeholder { color: var(--muted); }.guide-search kbd { border: 1px solid var(--line); border-radius: 7px; padding: 5px 8px; background: var(--bg); color: var(--muted); font-size: 10px; font-weight: 700; }
.popular-searches { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 17px; color: var(--muted-dark); font-size: 12px; }.popular-searches a { border: 1px solid var(--line-soft); border-radius: 999px; padding: 5px 9px; color: var(--muted); text-decoration: none; }.popular-searches a:hover { color: var(--primary); border-color: rgba(96, 165, 250, .4); }
.mobile-nav { display: none; overflow-x: auto; gap: 8px; padding-bottom: 12px; scrollbar-width: none; }.mobile-nav::-webkit-scrollbar { display: none; }.mobile-nav a { flex: 0 0 auto; border: 1px solid var(--line); border-radius: 999px; padding: 9px 13px; background: var(--surface); color: var(--muted); font-size: 12px; font-weight: 600; text-decoration: none; }
.guide-layout { display: grid; grid-template-columns: 238px minmax(0, 850px); justify-content: space-between; align-items: start; gap: clamp(42px, 7vw, 88px); padding-bottom: 90px; }
.guide-sidebar { position: sticky; top: 108px; padding: 17px 14px; border: 1px solid var(--line-soft); border-radius: 18px; background: rgba(31, 41, 55, .55); backdrop-filter: blur(12px); }
.sidebar-title { display: flex; align-items: center; gap: 8px; padding: 2px 8px 12px; color: var(--muted); }.sidebar-title .material-symbols-rounded { color: var(--primary); }.sidebar-title strong { font-size: 11px; letter-spacing: .09em; text-transform: uppercase; }
.guide-sidebar nav { display: flex; flex-direction: column; gap: 3px; }.guide-sidebar nav a { display: flex; align-items: center; gap: 10px; min-height: 39px; border-radius: 10px; padding: 0 10px; color: var(--muted); font-size: 12px; font-weight: 600; text-decoration: none; transition: color .2s, background .2s; }.guide-sidebar nav a .material-symbols-rounded { font-size: 18px; }.guide-sidebar nav a:hover, .guide-sidebar nav a.active { background: var(--primary-soft); color: var(--primary); }
.sidebar-help { display: flex; gap: 10px; margin-top: 15px; border-top: 1px solid var(--line-soft); padding: 15px 8px 2px; }.sidebar-help > .material-symbols-rounded { color: var(--green); }.sidebar-help div { display: flex; flex-direction: column; }.sidebar-help b { font-size: 11px; }.sidebar-help a { color: var(--primary); font-size: 10px; text-decoration: none; }
.guide-article { min-width: 0; }
.guide-section { scroll-margin-top: 110px; padding: 70px 0 82px; border-top: 1px solid var(--line-soft); }.guide-section:first-child { border-top: 0; padding-top: 0; }.guide-section.search-hidden { display: none; }
.section-heading-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 15px; }
.section-icon { width: 58px; height: 58px; display: grid; place-items: center; border-radius: 17px; font-size: 29px; }.section-icon.violet { color: var(--violet); background: var(--violet-soft); }.section-icon.blue { color: var(--primary); background: var(--primary-soft); }.section-icon.green { color: var(--green); background: var(--green-soft); }.section-icon.orange { color: var(--orange); background: rgba(255, 107, 53, .14); }
.section-kicker { margin-bottom: 3px; color: var(--primary); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }.section-heading-row h2 { font-size: clamp(34px, 5vw, 50px); line-height: 1.05; letter-spacing: -.04em; }.section-index { color: rgba(148, 163, 184, .12); font-size: 57px; line-height: 1; font-weight: 800; }
.section-intro { max-width: 760px; margin: 22px 0 30px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.subheading, .mini-title { font-size: 21px; letter-spacing: -.02em; }.subheading { margin: 34px 0 16px; }.mini-title { margin-bottom: 14px; }
.step-list { display: grid; gap: 10px; }.step-list > div { display: grid; grid-template-columns: 42px 1fr; align-items: start; gap: 14px; border: 1px solid var(--line-soft); border-radius: 15px; padding: 17px; background: var(--surface); }.step-list > div > span { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; background: var(--primary-soft); color: var(--primary); font-weight: 800; }.step-list h3 { font-size: 16px; }.step-list p { color: var(--muted); margin-top: 3px; font-size: 13px; }.step-list strong { color: var(--text); }
.app-callout { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; margin-top: 22px; border: 1px solid rgba(96, 165, 250, .3); border-radius: 14px; padding: 16px; background: var(--primary-soft); }.app-callout > .material-symbols-rounded { color: var(--primary); }.app-callout p { color: var(--muted); font-size: 13px; }.app-callout strong { color: var(--text); }.app-callout.success { border-color: rgba(63, 185, 142, .3); background: var(--green-soft); }.app-callout.success > .material-symbols-rounded { color: var(--green); }.app-callout.warning { border-color: rgba(224, 169, 58, .34); background: var(--amber-soft); }.app-callout.warning > .material-symbols-rounded { color: var(--amber); }
.visual-guide.two-column { display: grid; grid-template-columns: minmax(0, 320px) 1fr; align-items: center; gap: clamp(28px, 5vw, 54px); }.visual-guide.reverse { grid-template-columns: minmax(0, 320px) 1fr; }.screenshot-wrap { overflow: hidden; max-height: 600px; border: 1px solid var(--line); border-radius: 25px; background: var(--bg-deep); box-shadow: 0 22px 48px rgba(2, 6, 23, .3); }.screenshot-wrap img { width: 100%; height: 600px; object-fit: cover; object-position: top; }
.annotated-list { list-style: none; display: grid; gap: 7px; padding: 0; }.annotated-list li { display: grid; grid-template-columns: 40px 1fr; align-items: center; gap: 12px; border-bottom: 1px solid var(--line-soft); padding: 12px 0; }.annotated-list li > .material-symbols-rounded { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; background: var(--surface); color: var(--primary); }.annotated-list b { font-size: 14px; }.annotated-list p { color: var(--muted); font-size: 11px; }
.nav-demo { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 24px; border: 1px solid var(--line-soft); border-radius: 18px; padding: 10px; background: var(--surface); }.nav-demo > span { min-height: 62px; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 4px; border-radius: 13px; color: var(--muted); }.nav-demo > span.selected { background: var(--primary-soft); color: var(--primary); }.nav-demo i { font-style: normal; font-size: 23px; }.nav-demo b { font-size: 9px; }
.clean-steps { list-style: none; counter-reset: step; padding: 0; }.clean-steps li { counter-increment: step; position: relative; border-bottom: 1px solid var(--line-soft); padding: 13px 0 13px 44px; color: var(--muted); font-size: 13px; }.clean-steps li::before { content: counter(step); position: absolute; left: 0; top: 10px; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--primary); background: var(--surface); font-size: 11px; font-weight: 700; }.clean-steps strong { color: var(--text); }.inline-icon { display: inline; color: var(--text); vertical-align: -.2em; }
.icon-flow { display: flex; align-items: stretch; gap: 8px; overflow-x: auto; padding-bottom: 6px; }.icon-flow div { min-width: 128px; display: flex; align-items: center; flex-direction: column; justify-content: center; gap: 8px; border: 1px solid var(--line-soft); border-radius: 14px; padding: 15px; background: var(--surface); text-align: center; }.icon-flow div > span { color: var(--primary); }.icon-flow b { font-size: 11px; }.icon-flow > i { align-self: center; color: var(--muted-dark); font-style: normal; }
.content-type-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }.type-card { display: grid; grid-template-columns: 48px 1fr; gap: 13px; align-items: center; border: 1px solid var(--line-soft); border-radius: 15px; padding: 17px; background: var(--surface); }.type-card > .material-symbols-rounded { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; font-size: 25px; }.type-card h3 { font-size: 15px; }.type-card p { color: var(--muted); font-size: 11px; }.type-card.question > span { color: var(--orange); background: rgba(255, 107, 53, .14); }.type-card.flashcard > span { color: var(--pink); background: rgba(236, 72, 153, .14); }.type-card.info > span { color: #2dd4bf; background: rgba(45, 212, 191, .13); }.type-card.source > span { color: var(--green); background: var(--green-soft); }.type-card.ai { grid-column: 1 / -1; }.type-card.ai > span { color: var(--violet); background: var(--violet-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }.feature-grid > div { border: 1px solid var(--line-soft); border-radius: 16px; padding: 19px; background: var(--surface); }.feature-grid .material-symbols-rounded { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 22px; border-radius: 13px; background: var(--primary-soft); color: var(--primary); }.feature-grid h3 { font-size: 15px; }.feature-grid p { color: var(--muted); margin-top: 4px; font-size: 12px; }
.path-card { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 20px; border: 1px solid var(--line-soft); border-radius: 15px; padding: 15px; background: var(--surface); }.path-card > span { width: 100%; color: var(--muted); margin-bottom: 3px; font-size: 10px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }.path-card strong { border-radius: 8px; padding: 6px 9px; background: var(--bg); font-size: 11px; }.path-card i { color: var(--primary); font-size: 17px; font-style: normal; }
.study-screens { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }.study-screens figure { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--surface); }.study-screens figure img { width: 100%; height: 340px; object-fit: cover; object-position: top; }.study-screens figcaption { display: grid; grid-template-columns: auto 1fr; column-gap: 9px; border-top: 1px solid var(--line-soft); padding: 13px; }.study-screens figcaption > span { grid-row: 1 / 3; color: var(--primary); }.study-screens b { font-size: 12px; }.study-screens small { color: var(--muted); font-size: 9px; }
.study-choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }.study-choice > div { display: grid; grid-template-columns: auto 1fr; column-gap: 10px; border-radius: 15px; padding: 16px; }.study-choice span { grid-row: 1 / 3; width: 38px; height: 38px; display: grid; place-items: center; border-radius: 11px; }.study-choice b { font-size: 14px; }.study-choice p { font-size: 10px; opacity: .78; }.study-choice .again { border: 1px solid rgba(227, 93, 106, .32); background: rgba(227, 93, 106, .12); }.study-choice .again span { background: #e35d6a; }.study-choice .know { border: 1px solid rgba(63, 185, 142, .32); background: rgba(63, 185, 142, .12); }.study-choice .know span { background: var(--green); color: #071b14; }
.check-list { display: grid; gap: 9px; }.check-list > div { display: grid; grid-template-columns: 44px 1fr; align-items: center; gap: 13px; border: 1px solid var(--line-soft); border-radius: 14px; padding: 14px; background: var(--surface); }.check-list span { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 12px; background: var(--primary-soft); color: var(--primary); }.check-list p { color: var(--muted); font-size: 13px; }.check-list strong { color: var(--text); }
.profile-mock { overflow: hidden; width: min(560px, 100%); margin-inline: auto; border: 1px solid var(--line); border-radius: 24px; padding: 18px; background: var(--surface); box-shadow: 0 22px 48px rgba(2, 6, 23, .25); }.profile-top { display: flex; align-items: center; justify-content: space-between; padding: 2px 4px 15px; border-bottom: 1px solid var(--line-soft); }.profile-person { display: flex; align-items: center; gap: 13px; margin: 15px 0 10px; border: 1px solid rgba(141, 124, 198, .28); border-radius: 15px; padding: 16px; background: var(--violet-soft); }.profile-person > span { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; background: rgba(141, 124, 198, .2); color: var(--violet); }.profile-person div { display: flex; flex-direction: column; }.profile-person small { color: var(--muted); }.profile-row { display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 11px; border-bottom: 1px solid var(--line-soft); padding: 13px 4px; }.profile-row > span { color: var(--primary); }.profile-row div { display: flex; flex-direction: column; }.profile-row b { font-size: 13px; }.profile-row small { color: var(--muted); font-size: 10px; }.profile-row i { color: var(--muted-dark); font-style: normal; }
.legal-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 22px; }.legal-links a { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 11px; border: 1px solid var(--line-soft); border-radius: 15px; padding: 17px; background: var(--surface); text-decoration: none; }.legal-links a:hover { border-color: rgba(96, 165, 250, .45); }.legal-links a > span { color: var(--primary); }.legal-links a > div { display: flex; flex-direction: column; }.legal-links b { font-size: 13px; }.legal-links small { color: var(--muted); font-size: 10px; }.legal-links i { color: var(--muted-dark); font-style: normal; }
.faq-list { display: grid; gap: 8px; }.faq-list details { border: 1px solid var(--line-soft); border-radius: 14px; padding-inline: 17px; background: var(--surface); }.faq-list summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; cursor: pointer; padding-block: 17px; font-size: 14px; font-weight: 700; }.faq-list summary::-webkit-details-marker { display: none; }.faq-list summary span { color: var(--primary); transition: transform .2s; }.faq-list details[open] summary span { transform: rotate(45deg); }.faq-list details p { border-top: 1px solid var(--line-soft); padding: 15px 0 18px; color: var(--muted); font-size: 13px; }.faq-list a { color: var(--primary); }
.no-results { display: flex; align-items: center; flex-direction: column; gap: 7px; border: 1px solid var(--line); border-radius: 18px; padding: 45px 20px; background: var(--surface); text-align: center; }.no-results[hidden] { display: none; }.no-results > span { width: 56px; height: 56px; display: grid; place-items: center; margin-bottom: 7px; border-radius: 16px; background: var(--primary-soft); color: var(--primary); font-size: 30px; }.no-results strong { font-size: 19px; }.no-results p { color: var(--muted); font-size: 13px; }.no-results a { color: var(--primary); font-size: 12px; font-weight: 700; }
@media (max-width: 960px) { .guide-layout { grid-template-columns: 1fr; }.guide-sidebar { display: none; }.mobile-nav { display: flex; }.guide-article { width: min(850px, 100%); margin-inline: auto; } }
@media (max-width: 700px) {
  .guide-hero { padding-block: 46px 34px; text-align: left; }.guide-hero h1 { margin: 14px 0 10px; font-size: 40px; }.guide-hero > p { max-width: 330px; font-size: 14px; }
  .guide-search { min-height: 56px; grid-template-columns: auto 1fr; margin-top: 22px; padding-inline: 15px; border-radius: 15px; }.guide-search kbd { display: none; }.guide-search input { font-size: 13px; }
  .popular-searches { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; margin-inline: -14px; padding: 0 14px 4px; scrollbar-width: none; }.popular-searches::-webkit-scrollbar { display: none; }.popular-searches span, .popular-searches a { flex: 0 0 auto; }
  .mobile-nav { margin-bottom: 10px; padding-bottom: 8px; }.mobile-nav a { padding: 8px 12px; font-size: 11px; }
  .guide-layout { padding-bottom: 48px; }.guide-section { padding-block: 44px 50px; }.guide-section:first-child { padding-top: 22px; }
  .section-heading-row { grid-template-columns: auto 1fr; gap: 12px; }.section-index { display: none; }.section-icon { width: 44px; height: 44px; border-radius: 13px; font-size: 22px; }.section-heading-row h2 { font-size: 29px; }.section-kicker { font-size: 9px; }
  .section-intro { margin: 16px 0 22px; font-size: 14px; line-height: 1.6; }.visual-guide.two-column, .visual-guide.reverse { grid-template-columns: 1fr; gap: 24px; }.screenshot-wrap { width: min(340px, 100%); max-height: 430px; margin-inline: auto; border-radius: 21px; }.screenshot-wrap img { height: 430px; }
  .step-list { gap: 8px; }.step-list > div { grid-template-columns: 36px 1fr; gap: 11px; padding: 14px; }.step-list > div > span { width: 36px; height: 36px; }.step-list h3 { font-size: 14px; }.step-list p { font-size: 12px; }
  .app-callout { margin-top: 16px; padding: 14px; }.content-type-grid, .feature-grid, .legal-links { grid-template-columns: 1fr; }.type-card.ai { grid-column: 1; }.type-card { padding: 14px; }
  .study-screens { display: grid; grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: min(78vw, 280px); gap: 12px; overflow-x: auto; margin-inline: -14px; padding: 0 14px 10px; scroll-snap-type: x mandatory; scrollbar-width: none; }.study-screens::-webkit-scrollbar { display: none; }.study-screens figure { scroll-snap-align: center; }.study-screens figure img { height: 400px; }
  .study-choice { grid-template-columns: 1fr; }.nav-demo > span { min-height: 52px; }.profile-mock { padding: 14px; border-radius: 20px; }.faq-list summary { font-size: 13px; }
}
@media (max-width: 460px) { .guide-hero h1 { font-size: 38px; }.nav-demo b { display: none; }.profile-row { grid-template-columns: 34px 1fr auto; }.legal-links a { grid-template-columns: auto 1fr; }.legal-links i { display: none; } }