/* Russian A0 → B1 · course styles · palette and type from the approved design proposal */
@font-face { font-family: "PT Sans"; src: url("fonts/pt-sans-regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "PT Sans"; src: url("fonts/pt-sans-bold.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "PT Serif"; src: url("fonts/pt-serif-regular.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "PT Serif"; src: url("fonts/pt-serif-bold.woff2") format("woff2"); font-weight: 700; font-display: swap; }

:root {
  --paper: #FAF7F0; --card: #FFFDF8; --ink: #1E2A36; --muted: #4D5966;
  --control: #7A848E; --hair: #DDD6C8;
  --a1: #245C9E; --a1-tint: #DCE1E5; --a2: #875800; --a2-tint: #EAE1CE; --b1: #8A2350; --b1-tint: #EAD9DA;
  --ok: #1E6B4F; --ok-tint: #E3EEE8; --no: #B03A1E; --no-tint: #F6E2DB;
  --serif: "PT Serif", Georgia, "Times New Roman", serif;
  --sans: "PT Sans", "Segoe UI", Arial, sans-serif;
  --measure: 40rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 1.125rem; line-height: 1.5; }
img { max-width: 100%; height: auto; display: block; }
em, i { font-style: normal; font-weight: 700; }
a { color: var(--a1); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }
html { scroll-behavior: smooth; }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--ink); color: #fff; padding: 0.5rem 1rem; border-radius: 6px; z-index: 10; }
.skip:focus { top: 1rem; }

.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }

/* top bar */
.top { border-bottom: 1px solid var(--hair); background: var(--paper); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.5rem; }
.brand { font-family: var(--serif); font-weight: 700; font-size: 1.125rem; color: var(--ink); text-decoration: none; padding: 0.5rem 0; }
.badge { display: inline-block; color: #fff; background: var(--a1); font-weight: 700; font-size: 0.9375rem; line-height: 1; padding: 0.375rem 0.75rem; border-radius: 999px; }

/* headings and text */
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.2; margin: 0; }
h1 { font-size: 2.5rem; margin-top: 0.75rem; }
h2 { font-size: 1.625rem; display: flex; align-items: baseline; gap: 0.75rem; flex-wrap: wrap; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
p { margin: 0.75rem 0; }
.where { color: var(--muted); margin: 2rem 0 0; font-size: 1rem; }
.lede { font-size: 1.25rem; margin-top: 0.75rem; }
.muted { color: var(--muted); }
.ru { font-family: var(--serif); }
.ru-lg { font-family: var(--serif); font-size: 1.5rem; line-height: 1.35; }

/* lesson structure */
.steps { margin: 1.5rem 0 0; }
.steps ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.steps a { display: inline-flex; align-items: center; min-height: 2.25rem; padding: 0.25rem 0.75rem; border: 1px solid var(--hair); border-radius: 999px; color: var(--ink); text-decoration: none; font-size: 0.9375rem; background: var(--card); }
.steps a:hover { border-color: var(--control); }
.step { padding: 2.25rem 0 0.5rem; border-bottom: 1px solid var(--hair); scroll-margin-top: 1rem; }
.step:last-of-type { border-bottom: 0; }
.step h2 .n { display: inline-flex; align-items: center; justify-content: center; width: 2.25rem; height: 2.25rem; border-radius: 50%; background: var(--a1); color: #fff; font-family: var(--sans); font-size: 1.125rem; flex: none; }
.step h2 .t { font-family: var(--sans); font-weight: 400; font-size: 1rem; color: var(--muted); }
.goal { font-family: var(--serif); font-size: 1.375rem; border-left: 4px solid var(--a1); padding: 0.25rem 0 0.25rem 1rem; margin: 1rem 0; }

.status { margin: 1.25rem 0 0; padding: 0.75rem 1rem; border-radius: 8px; background: var(--card); border: 1px solid var(--hair); }
.status.done { background: var(--ok-tint); border-color: var(--ok); }
.status .icon { vertical-align: -0.15em; margin-right: 0.375rem; }
.notice { margin: 1rem 0 0; padding: 0.75rem 1rem; border-radius: 8px; background: var(--a1-tint); }

/* figure */
figure { margin: 1.25rem 0; }
figure img { width: 100%; max-width: 30rem; border: 1px solid var(--hair); border-radius: 8px; }
figcaption { color: var(--muted); font-size: 1rem; margin-top: 0.5rem; }
.astext { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 1rem 1.25rem; }
.astext ul { margin: 0.25rem 0 0; padding-left: 1.25rem; }

/* tables */
.scroll { overflow-x: auto; }
table.tbl { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 1.0625rem; }
.tbl th, .tbl td { text-align: left; padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--hair); vertical-align: top; }
.tbl th { font-weight: 700; color: var(--muted); font-size: 0.9375rem; }
.tbl td.letter { font-family: var(--serif); font-size: 1.5rem; line-height: 1.2; white-space: nowrap; }
.tbl tr.fam td { padding-top: 1rem; font-weight: 700; color: var(--a1); border-bottom: 0; }

/* word cards */
.words { display: grid; grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); gap: 0.75rem; margin: 1rem 0; }
.word { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; }
.word summary { list-style: none; cursor: pointer; padding: 0.625rem 0.875rem; min-height: 3rem; font-family: var(--serif); font-size: 1.5rem; line-height: 1.3; }
.word summary::-webkit-details-marker { display: none; }
.word summary:hover { background: var(--paper); border-radius: 8px; }
.word[open] { border-color: var(--control); }
.word .reveal { padding: 0 0.875rem 0.75rem; font-size: 1rem; }
.word .reveal .say { font-weight: 700; }
.word .reveal a { display: inline-block; margin-top: 0.25rem; padding: 0.25rem 0; }

.tip { background: var(--card); border: 1px solid var(--hair); border-left: 4px solid var(--a1); border-radius: 8px; padding: 0.75rem 1rem; margin: 1rem 0; }

/* buttons and inputs */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; min-height: 2.75rem; min-width: 2.75rem; padding: 0.625rem 1.125rem; border-radius: 6px; border: 1.5px solid var(--ink); background: var(--ink); color: #fff; font: 700 1rem/1.2 var(--sans); cursor: pointer; text-decoration: none; }
.btn:hover { background: #2C3A48; }
.btn.secondary { background: var(--card); color: var(--ink); border-color: var(--control); }
.btn.secondary:hover { border-color: var(--ink); }
.btn:disabled { background: var(--hair); border-color: var(--hair); color: var(--muted); cursor: not-allowed; }
.btn[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1rem 0; }

fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend, .qtext { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.75rem; padding: 0; }
.opt { display: flex; align-items: center; gap: 0.75rem; min-height: 3rem; margin: 0.5rem 0; padding: 0.625rem 1rem; border: 1.5px solid var(--control); border-radius: 6px; background: var(--card); cursor: pointer; }
.opt:hover { border-color: var(--ink); }
.opt input { width: 1.25rem; height: 1.25rem; margin: 0; flex: none; accent-color: var(--ink); }
.opt:has(input:checked) { border-color: var(--ink); box-shadow: inset 0 0 0 1px var(--ink); }
.opt:has(input:disabled) { cursor: default; }
.opt.is-right { border-color: var(--ok); background: var(--ok-tint); }
.opt.is-wrong { border-color: var(--no); background: var(--no-tint); }
input[type="text"], textarea { width: 100%; font: 1.125rem/1.5 var(--sans); color: var(--ink); background: var(--card); border: 1.5px solid var(--control); border-radius: 6px; padding: 0.625rem 0.875rem; }
input[type="text"]:focus-visible, textarea:focus-visible { border-color: var(--ink); }
label.field { display: block; font-weight: 700; margin: 1rem 0 0.375rem; }

/* quiz */
.quiz { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 1.25rem; margin: 1rem 0; }
.qhead { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; color: var(--muted); font-size: 1rem; margin-bottom: 1rem; }
.bar { height: 0.5rem; background: var(--paper); border: 1px solid var(--hair); border-radius: 999px; overflow: hidden; margin-bottom: 1.25rem; }
.bar span { display: block; height: 100%; background: var(--a1); width: 0; transition: width 0.25s ease; }
.fb { margin-top: 1rem; padding: 0.75rem 1rem; border-radius: 6px; border-left: 4px solid; }
.fb.ok { background: var(--ok-tint); border-color: var(--ok); }
.fb.no { background: var(--no-tint); border-color: var(--no); }
.fb .tag { font-weight: 700; margin: 0 0 0.25rem; display: flex; align-items: center; gap: 0.375rem; }
.fb.ok .tag { color: var(--ok); }
.fb.no .tag { color: var(--no); }
.fb p { margin: 0.25rem 0; }
.score { font-family: var(--serif); font-size: 2.5rem; font-weight: 700; line-height: 1; margin: 0.5rem 0; }
.missed { padding-left: 1.25rem; }
.missed li { margin: 0.75rem 0; }
.warm { margin: 1rem 0 1.5rem; }

/* stress drill */
.drill { display: grid; gap: 0.75rem; margin: 1rem 0; }
.drill-row { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 0.75rem 1rem; }
.drill-row .target { font-family: var(--serif); font-size: 1.5rem; margin: 0 0 0.5rem; }
.syls { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.syl { font-family: var(--serif); font-size: 1.375rem; min-height: 2.75rem; min-width: 3.25rem; padding: 0.25rem 0.875rem; border: 1.5px solid var(--control); border-radius: 6px; background: var(--paper); color: var(--ink); cursor: pointer; }
.syl:hover { border-color: var(--ink); }
.syl.is-right { border-color: var(--ok); background: var(--ok-tint); }
.syl.is-wrong { border-color: var(--no); background: var(--no-tint); }
.drill-row .fb { margin-top: 0.75rem; }

/* recap */
.recap details { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; margin: 0.75rem 0; }
.recap summary { cursor: pointer; padding: 0.75rem 1rem; font-weight: 700; min-height: 2.75rem; }
.recap details p { margin: 0 1rem 0.875rem; }
.cando { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }

/* pager and footer */
.pager { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 2rem 0 1rem; }
.build { font-size: 0.875rem; margin-top: 0.25rem; }
figure.plate img { max-width: 34rem; }
.ref { color: var(--muted); font-size: 1rem; border-top: 1px solid var(--hair); padding: 1.25rem 0 3rem; margin-top: 1rem; }

/* home */
.alphabet { display: grid; grid-template-columns: repeat(auto-fill, minmax(3.25rem, 1fr)); gap: 0.5rem; margin: 1.5rem 0 0.75rem; }
.alphabet span { display: flex; align-items: center; justify-content: center; aspect-ratio: 1; font-family: var(--serif); font-size: 1.75rem; border-radius: 8px; border: 1.5px dashed var(--control); color: var(--muted); background: transparent; }
.alphabet span.known { border: 1.5px solid var(--a1); background: var(--a1-tint); color: var(--ink); font-weight: 700; }
.legend { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 1rem; color: var(--muted); }
.legend .sw { display: inline-block; width: 1rem; height: 1rem; border-radius: 3px; vertical-align: -0.15em; margin-right: 0.375rem; }
.legend .sw.k { background: var(--a1-tint); border: 1.5px solid var(--a1); }
.legend .sw.u { border: 1.5px dashed var(--control); }
.plain { margin: 2.25rem 0; }
.panel { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 1.25rem; margin: 1.25rem 0; }
.lessons { list-style: none; margin: 0.5rem 0 0; padding: 0; }
.lessons li { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; padding: 0.75rem 0; border-bottom: 1px solid var(--hair); }
.lessons li:last-child { border-bottom: 0; }
.lessons .day { color: var(--muted); font-size: 1rem; }
.st { font-size: 1rem; font-weight: 700; display: inline-flex; align-items: center; gap: 0.375rem; }
.st.done { color: var(--ok); }
.st.started { color: var(--a1); }
.st.todo { color: var(--muted); }
.teacher { display: flex; gap: 1rem; align-items: center; }
.avatar { width: 4.5rem; height: 4.5rem; border-radius: 50%; flex: none; background: var(--a1-tint); color: var(--a1); display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-weight: 700; font-size: 2rem; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.road { display: flex; gap: 4px; margin: 1rem 0 0.5rem; }
.road div { border-radius: 6px; padding: 0.625rem 0.75rem; min-width: 0; }
.road .l1 { flex: 20; background: var(--a1-tint); border: 1.5px solid var(--a1); }
.road .l2 { flex: 24; background: var(--a2-tint); }
.road .l3 { flex: 32; background: var(--b1-tint); }
.road b { display: block; font-size: 1rem; }
.road span { font-size: 0.9375rem; color: var(--muted); }
.road .l1 span, .road .l1 b { color: var(--ink); }
.hint { font-size: 1rem; color: var(--muted); }

/* landing */
.wide { max-width: 60rem; margin: 0 auto; padding: 0 1.25rem; }
.wide .lede, .wide .hint { max-width: 40rem; }
.hero { padding: 3rem 0 1rem; }
.h1-ru { display: block; font-size: clamp(3rem, 9vw, 5.5rem); line-height: 1.04; }
.h1-en { display: block; font-family: var(--sans); font-size: 1.375rem; color: var(--muted); margin-top: 0.75rem; }
.block { padding: 2.5rem 0 0.5rem; border-top: 1px solid var(--hair); margin-top: 2rem; scroll-margin-top: 1rem; }
.points { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 0 2.5rem; margin-top: 0.75rem; }
.points .pt { border-top: 1px solid var(--hair); padding: 1rem 0 0.75rem; }
.points h3 { font-size: 1.1875rem; margin: 0 0 0.25rem; }
.points p { margin: 0; }
.week-strip { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; grid-template-columns: repeat(7, 1fr); gap: 0.5rem; }
.week-strip li { background: var(--card); border: 1px solid var(--hair); border-radius: 8px; padding: 0.75rem; display: flex; flex-direction: column; gap: 0.125rem; min-height: 8.5rem; }
.week-strip li.live { background: var(--ink); border-color: var(--ink); color: #fff; }
.week-strip li.rest { background: transparent; border-style: dashed; border-color: var(--control); }
.week-strip .d { font-weight: 700; }
.week-strip .what { font-family: var(--serif); font-weight: 700; font-size: 1.0625rem; line-height: 1.2; }
.week-strip .mins, .week-strip .why { font-size: 0.9375rem; color: var(--muted); }
.week-strip .why { margin-top: auto; }
.week-strip li.live .mins, .week-strip li.live .why { color: #D9DEE3; }
.lesson-steps { columns: 2; column-gap: 2.5rem; padding-left: 1.5rem; margin: 1rem 0 0; }
.lesson-steps li { break-inside: avoid; margin: 0 0 0.5rem; }
.road > div > span { display: block; }
body[data-page="home"] .top-in { max-width: 60rem; }
.mapweek { margin-top: 1rem; }
.mapweek h3 a { color: var(--ink); }
.coming { list-style: none; padding: 0; margin: 1rem 0 0; }
.coming li { display: flex; gap: 0.25rem 1rem; align-items: baseline; flex-wrap: wrap; padding: 0.75rem 0; border-bottom: 1px solid var(--hair); }
.coming .wk { font-weight: 700; min-width: 4.5rem; }
.coming .soon { margin-left: auto; font-size: 0.9375rem; color: var(--muted); }
@media (max-width: 56rem) { .week-strip { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 34rem) {
  .week-strip { grid-template-columns: repeat(2, 1fr); }
  .lesson-steps { columns: 1; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.375rem; }
  .road { flex-direction: column; }
  .road div { flex: none !important; }
}