:root {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --text: #1f1f1d;
  --muted: #65645f;
  --border: #dcdad3;
  --accent: #2957c8;
  --on-accent: #ffffff;
  --ok-bg: #e4f3e8;
  --ok-text: #1b6435;
  --bad-bg: #fce9e9;
  --bad-text: #9c2323;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171716;
    --surface: #222220;
    --text: #ececea;
    --muted: #a5a49e;
    --border: #3b3a36;
    --accent: #9bb7ff;
    --on-accent: #10131c;
    --ok-bg: #173620;
    --ok-text: #a0e3b3;
    --bad-bg: #3e1c1c;
    --bad-text: #ffb4b4;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px max(16px, env(safe-area-inset-right)) 48px max(16px, env(safe-area-inset-left));
}
h1 { font-size: 22px; line-height: 1.3; margin: 8px 0 16px; }
h2 { font-size: 18px; line-height: 1.35; margin: 28px 0 10px; }
p { margin: 0 0 12px; }
a { color: var(--accent); }
.muted { color: var(--muted); font-size: 15px; }
.error { color: var(--bad-text); }

[lang="he"] {
  font-family: "SF Hebrew", "Arial Hebrew", "Noto Sans Hebrew", Arial, sans-serif;
  font-size: 1.22em;
  line-height: 1.2; /* крупный шрифт не должен раздвигать строки русского текста */
  unicode-bidi: isolate;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 4px;
  padding: max(8px, env(safe-area-inset-top)) 8px 8px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.nav a {
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}
.nav a[aria-current="page"] { color: var(--text); background: var(--bg); font-weight: 600; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  margin: 16px 0;
}

button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
button.primary, .button.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); font-weight: 600; }
button:disabled { opacity: 0.6; cursor: default; }
.wide { display: flex; width: 100%; }
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.actions.single { grid-template-columns: 1fr; }

input[type="text"], input[type="password"], textarea {
  width: 100%;
  min-height: 50px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
input[lang="he"], textarea[lang="he"], textarea[dir="auto"] { font-size: 22px; }
textarea { resize: vertical; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.login { max-width: 360px; margin: 15vh auto 0; display: grid; gap: 12px; }
.login h1 { margin: 0; }

.units { list-style: none; margin: 0; padding: 0; }
.unit {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 12px;
  margin-bottom: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
}
.unit.current { border-color: var(--accent); }
.unit.done .unit-mark { color: var(--ok-text); }
.unit.current .unit-mark { color: var(--accent); }
.unit-count { color: var(--muted); font-size: 15px; font-variant-numeric: tabular-nums; }

.prose h2 { margin-top: 32px; }
.prose ul, .prose ol { padding-left: 22px; margin: 0 0 12px; }
.prose li { margin-bottom: 6px; }
.table-scroll { overflow-x: auto; margin: 0 -16px 16px; padding: 0 16px; }
table { border-collapse: collapse; font-size: 15px; min-width: 100%; }
th, td { padding: 7px 10px; border-bottom: 1px solid var(--border); text-align: start; vertical-align: top; }
th { color: var(--muted); font-weight: 500; white-space: nowrap; }
td [lang="he"] { white-space: nowrap; }

.exercise-count { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.exercise-verb { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; color: var(--muted); }
.exercise-verb [lang="he"] { color: var(--text); font-size: 24px; }
.exercise-prompt { font-size: 19px; font-weight: 600; margin: 6px 0 12px; }
.result { border-radius: 10px; padding: 10px 12px; margin-top: 12px; }
.result.ok { background: var(--ok-bg); color: var(--ok-text); }
.result.bad { background: var(--bad-bg); color: var(--bad-text); }
.result.plain { background: var(--bg); }
.result-label { font-size: 14px; }
.result-reference { font-size: 24px; font-weight: 600; }
.result-note { font-size: 15px; margin-top: 6px; }
.field-error { color: var(--bad-text); font-size: 15px; min-height: 22px; margin-top: 6px; }

.counter { font-size: 18px; }
.topic { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; }
.topic summary { padding: 14px 16px; cursor: pointer; font-weight: 600; }
.verbs { list-style: none; margin: 0; padding: 0; }
.verbs li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: 10px 12px 10px 16px;
  border-top: 1px solid var(--border);
}
.verbs a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 14px;
  gap: 8px;
  align-items: center;
  min-height: 46px;
  color: var(--text);
  text-decoration: none;
}
.verbs input, .known-toggle input { width: 22px; height: 22px; }
.verb-gloss { font-size: 15px; }
.verb-more { color: var(--muted); font-size: 20px; }
.verb-meaning { font-size: 19px; }
.known-toggle { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }

.drill-title { font-weight: 600; }
.drill-pronoun { font-size: 34px; text-align: center; margin: 6px 0 0; }
.drill .muted { text-align: center; }
.drill .exercise-count { text-align: start; }
.affix-frame { display: flex; justify-content: center; align-items: center; gap: 10px; margin: 14px 0 10px; }
.affix-frame input.affix { width: 84px; text-align: center; font-size: 26px; }
.affix-root { font-size: 30px; color: var(--muted); letter-spacing: 2px; }
.drill input[type="text"]:not(.affix) { margin: 14px 0 4px; text-align: center; font-size: 26px; }

.progress-row h2 { margin-top: 0; }
.mistakes { list-style: none; padding: 0; margin: 10px 0 0; }
.mistakes li { padding: 10px 0; border-top: 1px solid var(--border); }

.prose ul.cognates { list-style: none; padding: 0; margin: 0 0 12px; }
.cognates li {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 12px;
  padding: 10px 0;
  margin: 0;
  border-bottom: 1px solid var(--border);
}
.cognates .muted { font-size: 14px; }