:root {
  --bg: #ffffff;
  --panel: #f7f8fa;
  --ink: #21242b;
  --ink-soft: #565c66;
  --ink-faint: #8a909a;
  --line: #e4e7ec;
  --accent: #17683f;
  --accent-soft: #e7f2ec;
  --blue: #2b5c8a;
  --sidebar-w: 300px;
  --maxread: 760px;
  font-size: 16px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

#app { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  border-right: 1px solid var(--line);
  background: var(--panel);
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  padding: 0 0 40px;
}

.sidebar-head { padding: 22px 22px 12px; }
.home-link {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
}
.home-link:hover { text-decoration: none; }
.overall { margin: 8px 0 0; font-size: 0.8rem; color: var(--ink-faint); }

.nav-primary { display: flex; flex-direction: column; padding: 6px 12px 14px; border-bottom: 1px solid var(--line); }
.nav-primary a {
  color: var(--ink-soft);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.92rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-primary a:hover { background: #eef0f3; text-decoration: none; }
.nav-primary a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.pill {
  background: #d9534f;
  color: #fff;
  border-radius: 10px;
  font-size: 0.7rem;
  padding: 0 7px;
  line-height: 1.5;
  min-width: 18px;
  text-align: center;
}
.pill:empty { display: none; }

.sidebar-foot { padding: 14px 22px; border-top: 1px solid var(--line); }
.sidebar-foot a { font-size: 0.85rem; color: var(--ink-faint); }

.nav-subjects { padding: 12px 12px; }
.subj { margin-bottom: 2px; }
.subj-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
  user-select: none;
}
.subj-head:hover { background: #eef0f3; }
.subj-head .frac { font-size: 0.75rem; color: var(--ink-faint); font-weight: 500; }
.subj-topics { display: none; padding: 2px 0 8px 8px; }
.subj.open .subj-topics { display: block; }
.subj-unit { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-faint); padding: 8px 10px 2px; }
.topic-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 10px;
  border-radius: 5px;
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.35;
}
.topic-link:hover { background: #eef0f3; text-decoration: none; }
.topic-link.active { background: var(--accent-soft); color: var(--accent); }
.topic-link .box { flex: 0 0 auto; width: 13px; height: 13px; border: 1.5px solid var(--ink-faint); border-radius: 3px; margin-top: 3px; }
.topic-link.done .box { background: var(--accent); border-color: var(--accent); position: relative; }
.topic-link.done .box::after { content: "✓"; color: #fff; font-size: 9px; position: absolute; top: -3px; left: 1px; }

/* ---------- Main ---------- */
#main { flex: 1; min-width: 0; }
#view { max-width: 980px; margin: 0 auto; padding: 40px 40px 120px; }

h1 { font-size: 1.7rem; font-weight: 700; margin: 0 0 6px; line-height: 1.25; }
h2 { font-size: 1.25rem; font-weight: 700; margin: 2rem 0 0.6rem; }
h3 { font-size: 1.05rem; font-weight: 700; margin: 1.4rem 0 0.4rem; }
.eyebrow { color: var(--ink-faint); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; margin: 0 0 4px; }
.lead { color: var(--ink-soft); }

.prose { max-width: var(--maxread); }
.prose p, .prose li { font-size: 1rem; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose code { background: var(--panel); padding: 1px 5px; border-radius: 4px; font-size: 0.9em; }
.prose pre { background: #1e2330; color: #e6e9ef; padding: 14px 16px; border-radius: 8px; overflow-x: auto; }
.prose pre code { background: none; color: inherit; padding: 0; }
.prose blockquote { border-left: 3px solid var(--line); margin: 1em 0; padding: 2px 0 2px 16px; color: var(--ink-soft); }
.mathblock { display: block; text-align: center; margin: 0.8em 0; font-family: "Cambria Math", Georgia, serif; }
.mathin { font-family: "Cambria Math", Georgia, serif; font-style: italic; }

/* buttons + controls */
button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 7px;
}
button:hover { background: var(--panel); }
button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
button.primary:hover { background: #12572f; }
button:disabled { opacity: 0.5; cursor: default; }
button.ghost { border-color: transparent; background: transparent; color: var(--blue); padding: 4px 8px; }

input[type="text"], input[type="date"], input[type="number"], select, textarea {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 10px;
  color: var(--ink);
  background: #fff;
}
textarea { width: 100%; resize: vertical; }
label { font-size: 0.9rem; color: var(--ink-soft); }

/* progress bars */
.bar { background: var(--line); border-radius: 6px; height: 8px; overflow: hidden; }
.bar > span { display: block; height: 100%; background: var(--accent); }

/* cards */
.card { border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin: 14px 0; background: #fff; }
.card.soft { background: var(--panel); }
.muted { color: var(--ink-faint); }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
hr { border: none; border-top: 1px solid var(--line); margin: 2rem 0; }

/* topic header */
.topic-crumb { color: var(--ink-faint); font-size: 0.85rem; margin-bottom: 4px; }
.complete-toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 0.92rem; }

/* worked examples / practice */
.wexample { border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 8px; padding: 4px 18px 14px; margin: 14px 0; }
.wexample .prob { font-weight: 600; }
.practice-item { border-bottom: 1px solid var(--line); padding: 14px 0; }
.practice-item:last-child { border-bottom: none; }
.reveal { color: var(--blue); font-size: 0.9rem; }
.answer { margin-top: 10px; padding: 12px 14px; background: var(--accent-soft); border-radius: 8px; }
.answer.hidden { display: none; }
.glossary dt { font-weight: 600; margin-top: 10px; }
.glossary dd { margin: 0 0 4px; color: var(--ink-soft); }
.glossary .orig { color: var(--ink-faint); font-weight: 400; font-size: 0.9em; }

/* interactive tools */
.tools { margin-top: 2.4rem; }
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.toolpanel { padding: 16px 0; }
.chat { display: flex; flex-direction: column; gap: 10px; }
.msg { padding: 10px 14px; border-radius: 10px; max-width: 90%; }
.msg.user { align-self: flex-end; background: var(--accent-soft); }
.msg.assistant { align-self: flex-start; background: var(--panel); }

.quiz-q { border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; margin: 12px 0; }
.choice { display: block; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; margin: 6px 0; cursor: pointer; }
.choice:hover { background: var(--panel); }
.choice.chosen { border-color: var(--blue); background: #eef4fa; }
.choice.correct { border-color: var(--accent); background: var(--accent-soft); }
.choice.wrong { border-color: #d9534f; background: #fbeaea; }

.today-item { border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px; margin: 12px 0; display: flex; align-items: center; gap: 14px; }
.today-item .subjtag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-faint); }

.plan-day { border: 1px solid var(--line); border-radius: 10px; margin: 10px 0; padding: 12px 16px; }
.plan-day.is-today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.plan-day .date { font-weight: 700; }
.plan-item { display: flex; align-items: center; gap: 10px; padding: 6px 0; font-size: 0.9rem; border-top: 1px solid var(--line); }
.plan-item:first-of-type { border-top: none; }

/* schedule grid + drag-and-drop */
.sched-day { border: 1px solid var(--line); border-radius: 10px; margin: 12px 0; overflow: hidden; }
.sched-day.is-today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.sched-day.overflow { border-style: dashed; }
.sched-day-head { display: flex; align-items: baseline; gap: 10px; padding: 10px 14px; background: var(--panel); border-bottom: 1px solid var(--line); }
.sched-day-head .date { font-weight: 700; }
.slot { display: flex; align-items: center; gap: 12px; padding: 6px 14px; border-top: 1px solid var(--line); min-height: 46px; }
.slot:first-child { border-top: none; }
.slot .time { flex: 0 0 130px; font-size: 0.8rem; color: var(--ink-faint); font-variant-numeric: tabular-nums; }
.slot.empty { color: var(--ink-faint); }
.slot.dragover { background: var(--accent-soft); }
.block { flex: 1; display: flex; align-items: center; gap: 10px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: grab; }
.block:active { cursor: grabbing; }
.block.dragging { opacity: 0.4; }
.block .subjtag { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-faint); flex: 0 0 auto; }
.block .btitle { flex: 1; font-size: 0.9rem; }
.block .done-dot { color: var(--accent); }
.new-day-drop { border: 1px dashed var(--line); border-radius: 10px; padding: 14px; text-align: center; color: var(--ink-faint); margin: 12px 0; }
.new-day-drop.dragover { background: var(--accent-soft); border-color: var(--accent); }
.slot.break-slot { background: var(--panel); color: var(--ink-faint); font-size: 0.82rem; }

/* break block + timer (Today view) */
.break-block { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; border: 1px dashed var(--line); border-radius: 10px; padding: 10px 16px; margin: 10px 0; background: var(--panel); }
.break-info { display: flex; align-items: center; gap: 10px; }
.break-tag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; color: var(--ink-faint); }
.break-time { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--ink-soft); min-width: 62px; text-align: right; }
.day-done-note { border-left: 4px solid var(--accent); }

/* end-of-day celebration (the one deliberate celebratory moment) */
.celebrate-overlay { position: fixed; inset: 0; z-index: 200; display: flex; align-items: center; justify-content: center; background: rgba(20, 28, 22, 0.55); padding: 24px; opacity: 0; transition: opacity 0.3s ease; }
.celebrate-overlay.in { opacity: 1; }
.celebrate-card { position: relative; z-index: 2; background: #fff; border-radius: 16px; padding: 36px 40px; max-width: 520px; width: 100%; box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28); text-align: center; transform: translateY(10px) scale(0.98); transition: transform 0.35s cubic-bezier(0.2, 0.7, 0.2, 1); }
.celebrate-overlay.in .celebrate-card { transform: none; }
.celebrate-card h1 { font-size: 1.7rem; margin: 0.2em 0 0.4em; }
.celebrate-card .lead { color: var(--ink-soft); }
.celebrate-card button { margin-top: 10px; }
.confetti-canvas { position: fixed; inset: 0; z-index: 1; pointer-events: none; }

table.hours { border-collapse: collapse; width: 100%; max-width: 520px; }
table.hours td, table.hours th { border-bottom: 1px solid var(--line); padding: 8px 10px; text-align: left; font-size: 0.92rem; }

.notice { background: #fff8e6; border: 1px solid #f0dca0; border-radius: 8px; padding: 12px 16px; font-size: 0.9rem; color: #6b5b1f; }
.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: sp 0.7s linear infinite; vertical-align: -2px; }
@keyframes sp { to { transform: rotate(360deg); } }

/* subtle background pre-generation indicator (non-blocking, bottom-left) */
.pregen-note { position: fixed; left: 18px; bottom: 18px; z-index: 60; display: flex; align-items: center; gap: 9px; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 7px 14px 7px 12px; font-size: 0.82rem; color: var(--ink-soft); box-shadow: 0 4px 16px rgba(30, 40, 30, 0.08); opacity: 0; transform: translateY(6px); transition: opacity 0.3s ease, transform 0.3s ease; pointer-events: none; }
.pregen-note.show { opacity: 1; transform: none; }
.pregen-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex: 0 0 auto; animation: pregenPulse 1.4s ease-in-out infinite; }
@keyframes pregenPulse { 0%, 100% { opacity: 0.35; transform: scale(0.85); } 50% { opacity: 1; transform: scale(1.1); } }
@media (prefers-reduced-motion: reduce) { .pregen-dot { animation: none; } .pregen-note { transition: none; } }
@media (max-width: 820px) { .pregen-note { left: 10px; bottom: 10px; font-size: 0.78rem; } }

/* inline confirmation popover for Regenerate */
.regen-pop { position: fixed; z-index: 120; display: flex; align-items: center; gap: 12px; max-width: 300px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; box-shadow: 0 8px 26px rgba(30, 40, 30, 0.16); }
.regen-pop-msg { font-size: 0.86rem; color: var(--ink-soft); }
.regen-pop-confirm { padding: 6px 12px; font-size: 0.85rem; white-space: nowrap; }

/* pace-vs-plan status line (factual, not gamified) */
.pace-line { font-size: 0.92rem; color: var(--ink-soft); border-left: 3px solid var(--line); padding: 6px 0 6px 12px; margin: 0 0 16px; }
.pace-line strong { color: var(--ink); }
.pace-ontrack { border-left-color: var(--accent); }
.pace-ahead { border-left-color: var(--accent); }
.pace-behind { border-left-color: var(--amber, #b26a00); }

/* review-queue pattern summary */
.pattern-card { border: 1px solid var(--line); border-left: 4px solid var(--blue); border-radius: 10px; padding: 14px 18px; margin: 10px 0; background: #eef4fa; }
.pattern-tag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 700; color: var(--blue); }
.pattern-card .prose p:first-child { margin-top: 0; }
.pattern-card .prose p:last-child { margin-bottom: 0; }

/* callout boxes (key definitions / key ideas) */
.prose blockquote {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 8px 8px 0;
  margin: 1.1em 0;
  padding: 12px 16px;
  color: var(--ink);
}
.prose blockquote p { margin: 0.2em 0; }

/* glossary as keyed cards */
.glossary dt { font-weight: 700; color: var(--ink); margin-top: 12px; padding-left: 12px; border-left: 3px solid var(--accent); }
.glossary dd { margin: 2px 0 0 15px; color: var(--ink-soft); }
.glossary .orig { color: var(--ink-faint); font-weight: 400; font-size: 0.9em; }

/* teaching diagrams */
.diagram { margin: 22px 0; border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; background: #fff; max-width: var(--maxread); }
.diagram-title { font-weight: 700; font-size: 0.98rem; margin-bottom: 10px; }
.diagram-body { width: 100%; overflow-x: auto; }
.diagram-svg { width: 100%; height: auto; max-width: 520px; display: block; margin: 0 auto; }
.diagram-caption { color: var(--ink-soft); font-size: 0.88rem; margin: 10px 0 0; }
.diagram-note { color: var(--ink-soft); font-size: 0.88rem; margin: 8px 0 0; width: 100%; }
.diagram-controls { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 12px; }
.diagram-btn { font-size: 0.85rem; padding: 6px 12px; }
.diagram-legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 8px; font-size: 0.85rem; color: var(--ink-soft); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.swatch { width: 14px; height: 3px; border-radius: 2px; display: inline-block; }

/* diagram animation hooks */
.sd-dot, .sd-guide { transition: all 0.5s ease; }
.sd-line { transition: transform 0.5s ease; }
.cyc-node circle, .flow-node rect { transition: fill 0.25s ease, stroke-width 0.25s ease; }
.cyc-node.active circle, .flow-node.active rect { fill: var(--accent); stroke-width: 2.5; }
.cyc-node.active text, .flow-node.active text { fill: #fff; }

/* worked-example step reveal */
.we-steps { margin: 6px 0 0; }
.we-step { display: flex; gap: 12px; align-items: flex-start; padding: 4px 0; opacity: 0; transform: translateY(6px); transition: opacity 0.35s ease, transform 0.35s ease; }
.we-step.in { opacity: 1; transform: none; }
.we-step-num { flex: 0 0 auto; width: 24px; height: 24px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-size: 0.8rem; font-weight: 700; display: flex; align-items: center; justify-content: center; margin-top: 3px; }
.we-step-body { flex: 1; min-width: 0; }
.we-step-body .prose p:first-child { margin-top: 0; }
.we-controls { margin-top: 10px; }
.we-answer { margin-top: 12px; padding: 10px 14px; background: var(--accent-soft); border-radius: 8px; opacity: 0; transform: translateY(4px); transition: opacity 0.35s ease, transform 0.35s ease; }
.we-answer.in { opacity: 1; transform: none; }
.we-answer-label { display: inline-block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); font-weight: 700; margin-right: 8px; }
.we-answer .prose { display: inline; }
.we-answer .prose p { display: inline; margin: 0; }

/* pill variants */
.pill.amber { background: #b26a00; }

/* study notes card */
.notes-card { border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 10px; padding: 16px 18px; margin: 22px 0; background: #fff; max-width: var(--maxread); }
.notes-list { margin: 6px 0 0; padding-left: 1.2em; }
.notes-list li { margin: 7px 0; }

/* teacher feedback callout (distinct blue voice of the teacher) */
.teacher-note { border-left: 4px solid var(--blue); background: #eef4fa; border-radius: 0 8px 8px 0; padding: 10px 16px; margin: 10px 0; }
.teacher-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--blue); font-weight: 700; margin-bottom: 2px; }
.teacher-note .prose p:first-child { margin-top: 0; }
.teacher-note .prose p:last-child { margin-bottom: 0; }

/* weekly tests */
.weekly-subj { border-top: 1px solid var(--line); padding: 14px 0; }
.weekly-subj:first-of-type { border-top: none; }
.weekly-score { font-weight: 700; font-size: 1.05rem; padding: 2px 12px; border-radius: 20px; white-space: nowrap; }
.weekly-score.good { color: #0f5a34; background: var(--accent-soft); }
.weekly-score.ok { color: #7a5b00; background: #fbf3dc; }
.weekly-score.poor { color: #a1231f; background: #fbeaea; }
.weekly-detail { margin-top: 10px; }
.weekly-due { border-left: 4px solid #b26a00; background: #fff8ea; }
.review-gate { border-left: 4px solid #b26a00; background: #fff8ea; }

/* weekly-test gate (full-screen; sidebar hidden) */
body.gated #sidebar { display: none; }
.weekly-gate-head { border-left: 4px solid #b26a00; background: #fff8ea; border-radius: 0 10px 10px 0; padding: 14px 20px; margin-bottom: 18px; }
.weekly-gate-head h1 { margin: 2px 0 6px; }
.weekly-gate-head .lead { margin: 0; }

@media print {
  #sidebar, .toolbar, .toolpanel, .diagram-controls, .we-controls { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .we-step, .we-answer, .sd-dot, .sd-guide, .sd-line, .cyc-node circle, .flow-node rect { transition: none !important; }
  .we-step, .we-answer { opacity: 1 !important; transform: none !important; }
  .celebrate-overlay, .celebrate-card { transition: none !important; transform: none !important; }
}

@media (max-width: 820px) {
  #app { flex-direction: column; }
  #sidebar { width: 100%; min-width: 0; height: auto; position: static; }
  #view { padding: 24px 18px 100px; }
}

/* ============================================================= French B1 track */
/* Locked (Month 2) units — visible but greyed and not clickable. */
.subj-unit.locked { color: var(--ink-faint); opacity: 0.75; display: flex; align-items: center; gap: 6px; }
.subj-unit.locked .lock { font-size: 0.85em; }
.topic-link.locked { color: var(--ink-faint); opacity: 0.6; cursor: not-allowed; pointer-events: none; }
.topic-link.locked .box { border-style: dashed; }
.locked-unit { margin-top: 2.4rem; padding: 4px 0 8px; opacity: 0.85; }
.locked-unit h2 { color: var(--ink-faint); }
.locked-unit .lock { font-size: 0.9em; }
.coming-soon {
  display: inline-block; margin: 0 0 10px; padding: 4px 12px; border-radius: 20px;
  background: var(--panel); border: 1px solid var(--line);
  color: var(--ink-soft); font-size: 0.85rem; font-weight: 600;
}
.plan-item.locked { color: var(--ink-faint); opacity: 0.7; }
.plan-item.locked span:first-child { font-size: 0.85em; }

/* Top row of a lesson: complete toggle + Russian⇄French language switch. */
.topic-toprow { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; margin: 8px 0 22px; }
.lang-toggle { display: inline-flex; align-items: center; gap: 10px; }
.lang-toggle-label { font-size: 0.82rem; color: var(--ink-faint); }
.lang-switch { display: inline-flex; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); padding: 3px; }
.lang-btn {
  border: none; background: transparent; color: var(--ink-soft);
  padding: 7px 16px; border-radius: 18px; font-size: 0.9rem; font-weight: 600; cursor: pointer;
  min-height: 36px;
}
.lang-btn:hover { background: #eef0f3; }
.lang-btn.active { background: var(--accent); color: #fff; }

/* Long-form French lesson body. */
.fr-lesson { max-width: var(--maxread); }
.fr-lesson .prose p, .fr-lesson .prose li { font-size: 1.05rem; line-height: 1.7; }
.fr-lesson table { border-collapse: collapse; margin: 14px 0; width: 100%; }
.fr-lesson th, .fr-lesson td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.fr-lesson th { background: var(--panel); }
.fr-intro { background: var(--accent-soft); border-radius: 10px; padding: 14px 18px; margin: 6px 0 20px; }
.fr-section-tag { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); font-weight: 700; }
.fr-examples { display: flex; flex-direction: column; gap: 10px; margin: 6px 0; }
.fr-example { border-left: 3px solid var(--accent); padding: 6px 0 6px 14px; }
.fr-example-fr { margin: 0; font-size: 1.08rem; font-weight: 600; }
.fr-example-ru { margin: 2px 0 0; color: var(--ink-soft); font-size: 0.95rem; }
.fr-exercise { border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin: 12px 0; background: #fff; }
.fr-ex-instruction { margin: 0 0 10px; font-size: 1.02rem; }
.fr-ex-items { margin: 0 0 12px; padding-left: 24px; }
.fr-ex-items li { margin: 8px 0; font-size: 1.05rem; }
.fr-ex-q { }
.fr-ex-answer { color: var(--accent); font-weight: 600; }
.fr-ex-answer.hidden { display: none; }
.fr-vocab { border-collapse: collapse; width: 100%; max-width: var(--maxread); margin: 6px 0; }
.fr-vocab td { border-bottom: 1px solid var(--line); padding: 9px 12px; font-size: 1.02rem; }
.fr-vocab-fr { font-weight: 600; width: 45%; }
.fr-vocab-ru { color: var(--ink-soft); }

/* Level dividers in the sidebar + subject view (adaptive B1→C2 track). */
.subj-level { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); font-weight: 700; padding: 14px 10px 2px; border-top: 1px solid var(--line); margin-top: 6px; }
.subj-topics > .subj-level:first-child { border-top: none; margin-top: 0; }
.fr-level-head { color: var(--accent); border-bottom: 2px solid var(--accent-soft); padding-bottom: 4px; }
.fr-unit-head { color: var(--ink-soft); font-size: 1.02rem; }

/* Level/pace badges on a lesson. */
.fr-badges { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.fr-badge { font-size: 0.75rem; font-weight: 700; padding: 4px 12px; border-radius: 20px; background: var(--panel); border: 1px solid var(--line); color: var(--ink-soft); }
.fr-badge-level { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.fr-pace-review { background: #fff3e0; color: #a15c00; border-color: transparent; }
.fr-pace-accelerate { background: #e6f0ff; color: #1f5fb0; border-color: transparent; }

/* Estimated CEFR-level card (dashboard + subject page). */
.fr-level-card { border-left: 4px solid var(--accent); }
.fr-level-eyebrow { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-faint); font-weight: 700; }
.fr-level-name { font-size: 1.5rem; font-weight: 800; color: var(--accent); margin: 2px 0; }
.fr-level-track { display: flex; gap: 10px; flex-wrap: wrap; }
.fr-level-step { flex: 1 1 90px; min-width: 90px; }
.fr-level-step-name { font-size: 0.78rem; font-weight: 700; color: var(--ink-soft); margin-bottom: 3px; }
.fr-level-step.current .fr-level-step-name { color: var(--accent); }
.fr-level-bar { height: 8px; border-radius: 5px; background: var(--line); overflow: hidden; }
.fr-level-bar > span { display: block; height: 100%; background: var(--accent); }
.fr-level-step.current .fr-level-bar { box-shadow: 0 0 0 2px var(--accent-soft); }
.fr-level-frac { font-size: 0.72rem; color: var(--ink-faint); margin-top: 2px; }

/* Interactive reading exercises. */
.fr-blank-input { padding: 4px 8px; border: 1px solid var(--line); border-radius: 6px; font-size: 1rem; min-width: 120px; }
.fr-mark { font-weight: 700; }
.fr-mark.ok { color: var(--accent); }
.fr-mark.no { color: #b23b38; }
.fr-mc-item { margin: 10px 0; }
.fr-mc-q { font-weight: 600; margin-bottom: 6px; }
.fr-mc-opts { display: flex; flex-direction: column; gap: 6px; }
.fr-mc-choice { text-align: left; justify-content: flex-start; border: 1px solid var(--line); background: #fff; padding: 9px 14px; border-radius: 8px; cursor: pointer; }
.fr-mc-choice:hover { background: var(--panel); }
.fr-mc-choice.correct { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.fr-mc-choice.wrong { border-color: #e0a3a1; background: #fbeaea; color: #b23b38; }
.fr-match { border-collapse: collapse; margin: 8px 0; }
.fr-match td { padding: 6px 10px 6px 0; }
.fr-match-left { font-weight: 600; }
.fr-match-sel { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; font-size: 0.95rem; }
.fr-reading-score { font-weight: 600; }

/* Writing tasks + Claude feedback. */
.fr-writing { border: 1px solid var(--line); border-left: 3px solid var(--blue); border-radius: 10px; padding: 14px 18px; margin: 12px 0; background: #fff; }
.fr-writing-prompt { font-size: 1.05rem; margin: 0 0 4px; }
.fr-writing-prompt-ru { margin: 0 0 4px; color: var(--ink-soft); }
.fr-writing-guide { margin: 0 0 8px; font-size: 0.9rem; }
.fr-writing-input { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: 1.02rem; font-family: inherit; line-height: 1.6; }
.fr-wc { font-size: 0.82rem; }
.fr-writing-fb { margin-top: 12px; }
.fr-fb-card { border-radius: 10px; padding: 12px 16px; }
.fr-fb-good { background: var(--accent-soft); border: 1px solid #b8dcc6; }
.fr-fb-ok { background: #fff8ea; border: 1px solid #f0dca0; }
.fr-fb-poor { background: #fbeaea; border: 1px solid #e0a3a1; }
.fr-fb-score { font-weight: 800; font-size: 1.05rem; }
.fr-fb-h { font-weight: 700; margin: 10px 0 2px; font-size: 0.9rem; }
.fr-fb-list { margin: 2px 0 0; padding-left: 20px; }
.fr-fb-list li { margin: 4px 0; }
.fr-fb-wrong { color: #b23b38; text-decoration: line-through; }
.fr-fb-correct { color: var(--accent); font-weight: 600; }
.fr-fb-corrected { background: #fff; border-radius: 6px; padding: 8px 10px; font-style: italic; }
.fr-fb-summary { margin: 10px 0 0; }

/* Larger, calmer defaults across the whole French track (used on iPad). */
body.track-french-b1 { --maxread: 720px; }
body.track-french-b1 #view h1 { font-size: 1.9rem; line-height: 1.3; }
body.track-french-b1 .complete-toggle { font-size: 1rem; }

/* ---- iPad comfort: generous type and tap targets, portrait + landscape ---- */
/* Portrait iPad (and similar tablets) — sidebar stacks; big touch targets. */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
  :root { font-size: 18px; }
  #app { flex-direction: column; }
  #sidebar { width: 100%; min-width: 0; height: auto; position: static; }
  #view { max-width: 720px; padding: 30px 34px 120px; }
  .topic-link { padding: 12px 12px; font-size: 1rem; min-height: 46px; }
  .nav-primary a { padding: 12px 12px; }
  button, .lang-btn { min-height: 46px; }
  .fr-ex-items li, .fr-vocab td, .fr-example-fr { font-size: 1.12rem; }
}
/* Landscape iPad — keep the sidebar, but roomier text and targets. */
@media (min-width: 1024px) and (max-width: 1366px) and (orientation: landscape) {
  :root { font-size: 17px; }
  #view { max-width: 860px; padding: 40px 44px 120px; }
  .topic-link { padding: 11px 12px; min-height: 44px; }
  button, .lang-btn { min-height: 44px; }
}
/* Any coarse-pointer (touch) device: comfortable minimum hit areas. */
@media (pointer: coarse) {
  button, .lang-btn { min-height: 44px; padding-top: 10px; padding-bottom: 10px; }
  .topic-link { min-height: 44px; }
  input[type="checkbox"] { width: 22px; height: 22px; }
}