:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --surface: #ffffff;
  --line: #dbe1e8;
  --text: #1d2430;
  --muted: #667085;
  --accent: #2563eb;
  --accent-strong: #1d4ed8;
  --ok: #16803c;
  --danger: #b42318;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a, input, select { touch-action: manipulation; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
}

.brand { font-weight: 750; }
.nav { display: flex; align-items: center; gap: 14px; color: var(--muted); font-size: 15px; }
.nav a, .link-button { min-height: 44px; display: inline-flex; align-items: center; }
.nav a:hover, .link-button:hover { color: var(--text); }
.link-button {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
}

.hero {
  padding: 48px 0 32px;
}
.hero.compact { padding-top: 24px; }
.hero h1, .section-head h1 {
  margin: 0;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1;
  letter-spacing: 0;
}
.hero p {
  max-width: 680px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.muted { color: var(--muted); line-height: 1.55; }

.auth-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
  gap: 40px;
  align-items: center;
  min-height: calc(100svh - 150px);
}

.form, .panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.form { display: grid; gap: 14px; }
.form h2, .panel h2 { margin: 0 0 12px; font-size: 20px; }
label { display: grid; gap: 7px; color: var(--muted); font-size: 14px; }
input, select {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 11px;
  background: #fff;
  color: var(--text);
}

.primary, .secondary {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  cursor: pointer;
  font-weight: 700;
}
.primary { background: var(--accent); color: #fff; }
.primary:hover { background: var(--accent-strong); }
.secondary { border: 1px solid var(--line); background: #fff; color: var(--text); }

.flash {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: 6px;
  background: #e9f6ee;
  color: var(--ok);
}
.flash.error { background: #fee4e2; color: var(--danger); }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}
.stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.stat span { display: block; font-size: 32px; font-weight: 800; }
.stat small { color: var(--muted); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin: 24px 0 16px;
}
.section-head h2 { margin: 0; font-size: 26px; }
.text-link { color: var(--accent); font-weight: 700; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}
.card, .lesson {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.card {
  display: grid;
  gap: 12px;
  padding: 20px;
  min-height: 168px;
}
.card h3 { margin: 0; font-size: 22px; }
.card p { margin: 0; color: var(--muted); line-height: 1.5; }
.card small { color: var(--muted); }

.progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8edf3;
}
.progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
}

.lesson-list { display: grid; gap: 14px; }
.lesson {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 18px;
  padding: 18px;
}
.lesson h2 { margin: 0 0 8px; font-size: 22px; }
.lesson p { margin: 0 0 14px; color: var(--muted); line-height: 1.5; }
.lesson-form { display: grid; gap: 10px; }

.lesson-hero {
  padding: 28px 0 18px;
}
.lesson-hero h1 {
  margin: 0;
  font-size: clamp(36px, 8vw, 68px);
  line-height: 1;
  letter-spacing: 0;
}
.lesson-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}
.lesson-tabs {
  position: sticky;
  top: 64px;
  z-index: 8;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  background: rgba(244, 246, 248, 0.94);
  backdrop-filter: blur(10px);
  scrollbar-width: none;
}
.lesson-tabs a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-weight: 700;
}
.lesson-section {
  scroll-margin-top: 126px;
  padding: 20px 0 28px;
}
.lesson-blocks {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 18px 0 24px;
}
.learning-flow {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}
.learning-block {
  display: grid;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.block-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.block-meta span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8fafc;
  color: var(--muted);
  font-size: 13px;
  font-weight: 760;
}
.companion-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.35fr);
  gap: 12px;
}
.companion-card {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  min-height: 96px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}
.companion-explain {
  background: #eef7ff;
}
.companion-avatar {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  overflow: hidden;
}
.companion-avatar img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.companion-card small {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}
.companion-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 18px;
}
.companion-card p {
  margin: 0;
  color: var(--text);
  line-height: 1.5;
}
.block-audio {
  display: grid;
  grid-template-columns: minmax(84px, 120px) minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid #b8c2d1;
  border-radius: 8px;
  background: #f8fafc;
}
.block-audio small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}
.block-audio audio {
  width: 100%;
}
.block-body {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 16px;
  align-items: start;
}
.block-points {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.55;
}
.block-points li + li {
  margin-top: 8px;
}
.source-card {
  margin: 0;
}
.source-card img {
  display: block;
  width: 100%;
  max-height: 680px;
  object-fit: contain;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.source-card figcaption {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}
.source-snippets {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 12px;
}
.source-snippets figure {
  margin: 0;
  padding: 10px;
  border: 1px dashed #b8c2d1;
  border-radius: 8px;
  background: #fbfdff;
}
.source-snippets img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}
.source-snippets figcaption {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}
.example-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.example-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.example-card img {
  display: block;
  width: 100%;
  height: auto;
  background: #fff;
}
.example-card figcaption {
  display: grid;
  gap: 6px;
  padding: 12px;
  border-top: 1px solid var(--line);
}
.example-card strong {
  font-size: 16px;
}
.example-card span {
  color: var(--muted);
  line-height: 1.5;
}
.panel h3, .practice-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}
.panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}
.goal-list {
  display: grid;
  gap: 10px;
}
.goal {
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--surface);
  line-height: 1.45;
}
.tight-title {
  margin: 26px 0 12px;
  font-size: 24px;
}
.phrase-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}
.phrase-card {
  display: grid;
  gap: 6px;
  min-height: 128px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}
.phrase-card .jp {
  font-size: 24px;
  font-weight: 760;
  line-height: 1.25;
}
.phrase-card .romaji {
  color: var(--muted);
}
.phrase-card .translation {
  display: none;
  color: var(--accent-strong);
  font-weight: 700;
}
.phrase-card.is-open .translation {
  display: block;
}
.source-pages {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.source-pages summary {
  min-height: 52px;
  padding: 15px 16px;
  cursor: pointer;
  font-weight: 760;
}
.page-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 72vw);
  gap: 12px;
  overflow-x: auto;
  padding: 12px 0 18px;
  scroll-snap-type: x mandatory;
}
.visible-pages {
  position: relative;
  margin-top: 10px;
  padding-bottom: 28px;
}
.visible-pages::after {
  content: "Листай вбок";
  position: sticky;
  left: 0;
  align-self: end;
  display: inline-flex;
  width: max-content;
  min-height: 32px;
  align-items: center;
  margin-left: 4px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.source-pages .page-strip {
  padding: 0 16px 18px;
}
.page-image {
  margin: 0;
  scroll-snap-align: start;
}
.page-image img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}
.page-image figcaption {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}
.audio-list {
  display: grid;
  gap: 10px;
}
.audio-item {
  display: grid;
  grid-template-columns: minmax(120px, 180px) minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.audio-item small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}
.audio-item audio {
  width: 100%;
}
.practice-card {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}
.tile-bank, .answer-zone {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 58px;
  padding: 10px;
  border: 1px dashed #b8c2d1;
  border-radius: 8px;
  background: #f8fafc;
}
.answer-zone {
  min-height: 72px;
  border-color: var(--accent);
  background: #eef5ff;
}
.tile {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 14px;
  background: #fff;
  color: var(--text);
  font-size: 20px;
  font-weight: 760;
}
.practice-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.practice-result {
  min-height: 24px;
  margin: 0;
  color: var(--danger);
  font-weight: 760;
}
.practice-result.is-ok {
  color: var(--ok);
}
.kana-target {
  justify-self: start;
  display: grid;
  place-items: center;
  width: 86px;
  height: 86px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-size: 56px;
  font-weight: 800;
}
.draw-pad {
  width: 100%;
  max-width: 640px;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(#0000 49%, #dbe1e8 50%, #0000 51%),
    linear-gradient(90deg, #0000 49%, #dbe1e8 50%, #0000 51%),
    #fff;
  touch-action: none;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}
.table { display: grid; gap: 8px; }
.row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.row span, .row small { color: var(--muted); }

@media (max-width: 760px) {
  body { padding-bottom: 76px; }
  .topbar { position: static; align-items: flex-start; flex-direction: column; padding: 14px 16px; }
  .nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    gap: 0;
    min-height: 64px;
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
  }
  .nav a, .nav form, .link-button {
    width: 100%;
    min-height: 64px;
    justify-content: center;
    text-align: center;
    font-size: 14px;
  }
  .auth-panel, .lesson, .split { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 24px; }
  .hero h1, .section-head h1 { font-size: 38px; }
  .page { width: min(100% - 24px, 1120px); padding-top: 20px; }
  .cards { grid-template-columns: 1fr; }
  .lesson { padding: 16px; }
  .lesson-form { gap: 12px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .lesson-tabs { top: 0; margin-left: -12px; margin-right: -12px; padding-left: 12px; }
  .lesson-section { scroll-margin-top: 74px; }
  .learning-block { padding: 14px; }
  .companion-grid, .block-body, .block-audio, .source-snippets, .example-grid { grid-template-columns: 1fr; }
  .companion-card { grid-template-columns: 48px minmax(0, 1fr); padding: 12px; }
  .companion-avatar { width: 48px; height: 48px; font-size: 22px; }
  .source-card img { max-height: none; }
  .phrase-cards { grid-template-columns: 1fr; }
  .page-strip { grid-auto-columns: minmax(250px, 86vw); }
  .audio-item { grid-template-columns: 1fr; }
  .practice-actions .secondary, .practice-actions .primary { flex: 1 1 140px; }
}