/* contosapp.com/learn — same tokens as landing/index.html */
:root {
  --ink: #16241E; --paper: #F2F4EE; --card: #FFFFFF; --green: #0E7B5B; --green-dk: #0A5B43;
  --amber: #F4B942; --line: #DCE2D8; --mut: #5E6B62; --cream: #F2F4EE;
  --a1: #0E7B5B; --a2: #18839B; --b1: #C8860A; --b2: #2D5DA8;
  --display: 'Bricolage Grotesque', 'Inter', system-ui, sans-serif;
  --serif: 'Literata', Georgia, serif;
  --body: 'Inter', system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
a { color: var(--green-dk); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -0.02em; line-height: 1.12; margin: 0; }
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 20px; }
.wrap-narrow.flush { padding: 0; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(10,91,67,0.96); color: var(--cream); }
.nav a { color: var(--cream); }
.nav-row { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font: 800 20px var(--display); text-decoration: none; }
.brand img { border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 22px; font-weight: 600; font-size: 15px; }
.nav-links a { text-decoration: none; }
.nav-links .btn { padding: 9px 16px; font-size: 14px; color: var(--ink); }
@media (max-width: 560px) { .hide-sm { display: none; } .nav-links { gap: 14px; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; padding: 13px 22px; font: 700 16px/1 var(--body); text-decoration: none; }
.btn-green { background: var(--green); color: #fff !important; }
.btn-amber { background: var(--amber); color: var(--ink) !important; }
.btn-big { padding: 17px 30px; font-size: 17px; }
.btn:hover { filter: brightness(1.05); }

/* page head */
.page-head { background: var(--green-dk); color: var(--cream); padding: 22px 0 40px; }
.page-head a { color: var(--cream); }
.page-head h1 { font-size: clamp(32px, 5.4vw, 50px); font-weight: 800; }
.page-head .sub { font: 500 20px/1.4 var(--serif); margin: 12px 0 0; opacity: 0.9; }
.kicker { font-size: 12.5px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber); margin: 0 0 10px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px 0; padding: 0; margin: 0 0 22px; font-size: 13.5px; opacity: 0.85; }
.crumbs li + li::before { content: "›"; margin: 0 8px; opacity: 0.7; }
.crumbs a { text-decoration: none; }

/* body */
.page { padding: 34px 20px 48px; }
.page section { margin-top: 42px; }
.page h2 { font-size: clamp(25px, 3.4vw, 31px); margin-bottom: 14px; }
.page h3 { font-size: 21px; margin: 26px 0 8px; }
.page p, .page li { max-width: 68ch; }
.answer { font: 400 20px/1.6 var(--serif); margin: 0; padding: 20px 22px; background: var(--card); border-left: 5px solid var(--green); border-radius: 12px; }
.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 22px 0 0; }
.facts div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 16px; }
.facts dt { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--mut); }
.facts dd { margin: 2px 0 0; font-weight: 600; }
.note, .tip { background: #FFF6E0; border: 1px solid #F2DDA6; border-radius: 12px; padding: 14px 18px; margin: 20px 0; }
.tip { font-size: 15px; }
.tbl { overflow-x: auto; margin: 18px 0; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 16px; }
caption { text-align: left; padding: 12px 16px 0; font-weight: 700; }
th, td { text-align: left; padding: 10px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--mut); }
tr:last-child td { border-bottom: 0; }
td[lang] { font-weight: 600; }
.exs { display: grid; gap: 12px; margin: 18px 0; }
.ex { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; }
.ex p { margin: 0; }
.ex-t { font: 600 20px/1.45 var(--serif); }
.ex-r { color: var(--green-dk); font-size: 15px; font-style: italic; }
.ex-en { color: var(--mut); }
.ex-note { font-size: 15px; margin-top: 6px !important; }
.quote { margin: 20px 0; background: var(--card); border-radius: 12px; padding: 18px 22px; border: 1px solid var(--line); }
.quote blockquote { margin: 0; font: 400 19px/1.55 var(--serif); }
.quote figcaption { color: var(--mut); margin-top: 6px; }
.q-src { font-size: 14px; margin: 8px 0 0; }
.words { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 10px; }
.words li { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; display: flex; flex-direction: column; }
.w-t { font: 600 18px var(--serif); }
.w-r { font-size: 14px; font-style: italic; color: var(--green-dk); }
.w-en { color: var(--mut); font-size: 15px; }
.cta-card { margin: 26px 0; padding: 20px 22px; border-radius: 14px; background: #E5F1EB; display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: center; justify-content: space-between; }
.cta-card p { margin: 0; flex: 1 1 280px; font-weight: 600; }

/* story */
.chapter h2 { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 12px; }
.ch-n { font: 800 13px var(--body); letter-spacing: 0.1em; text-transform: uppercase; color: var(--green); width: 100%; }
.ch-en { font: 500 16px var(--body); color: var(--mut); letter-spacing: 0; }
.story { background: var(--card); border-radius: 14px; padding: 22px 26px; border: 1px solid var(--line); }
.story p { font: 400 20px/1.75 var(--serif); margin: 0 0 1em; }
.story p:last-child { margin-bottom: 0; }
.w { text-decoration: underline dotted rgba(14,123,91,0.3); text-decoration-thickness: 1px; text-underline-offset: 5px; cursor: pointer; border-radius: 4px; }
.w:hover, .w.on { background: rgba(244,185,66,0.35); }
.gloss { position: absolute; z-index: 60; background: var(--ink); color: var(--cream); font: 600 15px/1.35 var(--body); padding: 8px 12px; border-radius: 10px; max-width: 260px; box-shadow: 0 10px 24px rgba(0,0,0,0.25); pointer-events: none; }
.cliff { margin: 34px 0 0; padding: 26px; border-radius: 16px; background: var(--green-dk); color: var(--cream); text-align: center; }
.cliff-t { font: 500 21px/1.5 var(--serif); margin: 0 auto 20px; max-width: 34ch; }
.cliff .micro { color: rgba(242,244,238,0.75); }
.qs li { margin-bottom: 14px; }
.qs p { margin: 0 0 4px; }
details summary { cursor: pointer; font-weight: 600; color: var(--green-dk); }

/* lists, cards */
.link-list { padding-left: 1.1em; }
.link-list li { margin: 6px 0; }
.link-list.big { list-style: none; padding: 0; }
.link-list.big li { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin: 10px 0; display: flex; flex-direction: column; }
.link-list.big a { font: 700 19px var(--display); }
.link-list.big span { color: var(--mut); font-size: 15px; }
.related ul:not(.cards) { padding-left: 1.1em; }
.related li span { color: var(--mut); margin-left: 8px; font-size: 15px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 30px 0 18px; }
.chips a { text-decoration: none; padding: 8px 14px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); font-weight: 600; font-size: 15px; color: var(--ink); }
.chips a[aria-current] { background: var(--green); border-color: var(--green); color: #fff; }
.cards { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card a { display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; text-decoration: none; color: var(--ink); }
.card a:hover { border-color: var(--green); }
.card-top { display: flex; justify-content: space-between; align-items: center; }
.card .em { font-size: 28px; }
.card-t { font: 600 20px/1.25 var(--serif); }
.card-en { font-size: 14px; color: var(--mut); }
.card-ex { font: 400 15px/1.5 var(--serif); color: #34443C; }
.pill { font-size: 12px; font-weight: 800; color: #fff; padding: 3px 9px; border-radius: 999px; }
.pill-a1 { background: var(--a1); } .pill-a2 { background: var(--a2); } .pill-b1 { background: var(--b1); } .pill-b2 { background: var(--b2); }
.levels { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.levels a { display: flex; flex-direction: column; padding: 14px 16px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: var(--ink); }
.levels strong { font: 800 22px var(--display); color: var(--green); }
.levels span { color: var(--mut); font-size: 14px; }
.lang-tiles { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.lang-tiles a { display: flex; flex-direction: column; padding: 14px 16px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; color: var(--ink); }
.lang-tiles .t { font-weight: 700; }
.lang-tiles .n { color: var(--mut); font-size: 15px; }

/* faq, trust */
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin: 10px 0; }
.faq details p { margin: 10px 0 0; }
.trust { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 14.5px; color: var(--mut); }
.sources-h { font-weight: 700; color: var(--ink); margin: 0 0 4px; }
.sources { margin: 0 0 12px; padding-left: 1.1em; }

/* cta band, footer */
.cta-band { background: var(--green-dk); color: var(--cream); text-align: center; padding: 56px 0; }
.cta-band h2 { font-size: clamp(28px, 4vw, 38px); }
.cta-band p { max-width: 560px; margin: 12px auto 24px; color: rgba(242,244,238,0.85); }
.cta-band .micro { font-size: 14px; margin: 14px auto 0; }
.micro.dark { color: var(--mut); }
.foot { background: #0b2a21; color: rgba(242,244,238,0.8); padding: 36px 0; font-size: 14.5px; }
.foot a { color: var(--cream); }
.foot-h { font-weight: 700; color: var(--cream); margin: 0 0 8px; }
.foot-langs ul { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-wrap: wrap; gap: 6px 18px; }
.foot-meta { margin: 6px 0; }