/* ==========================================================================
   BandUp — ADHD-first design system
   Calm, low-distraction, one-thing-at-a-time. Vanilla CSS, no build step.
   ========================================================================== */

:root {
  /* Brand + accents (one primary accent; muted supporting hues) */
  --blue: #2563eb;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-soft: #eef4ff;
  --green: #10b981;
  --green-dark: #059669;
  --green-soft: #e7f8f1;
  --amber: #f59e0b;
  --amber-soft: #fef3c7;
  --amber-ink: #92400e;
  --red: #dc2626;
  --red-soft: #fde8e8;
  --purple: #7c3aed;
  --purple-soft: #f2ecfe;

  /* Neutrals — warm, low-glare */
  --bg: #f7f8fa;
  --surface: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f1f3f5;
  --gray-200: #e6e8eb;
  --gray-300: #d3d7dc;
  --gray-400: #9aa1a9;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --ink: #1f2328;

  /* Shape + rhythm */
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.04);
  --shadow: 0 4px 16px rgba(16,24,40,.08);
  --shadow-lg: 0 12px 32px rgba(16,24,40,.12);
  --tap: 44px; /* minimum touch target */
  --maxw: 780px;
  --sidebar-w: 264px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Reduce motion for those who need calm */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

/* ---------- App layout: sidebar + main ---------------------------------- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}
.main {
  min-width: 0;
  padding: 0 clamp(1rem, 4vw, 3rem) 5rem;
}
.main-inner { max-width: var(--maxw); margin: 0 auto; }

/* ---------- Top app bar (mobile) ---------------------------------------- */
.appbar {
  display: none;
  position: sticky;
  top: 0;
  z-index: 40;
  align-items: center;
  gap: .75rem;
  padding: .5rem .9rem;
  background: rgba(255,255,255,.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--gray-200);
}
.appbar .brand { font-weight: 700; font-size: 1rem; }
.appbar .menu-btn {
  width: var(--tap); height: var(--tap);
  border: 1px solid var(--gray-200); background: var(--surface);
  border-radius: var(--radius-sm); font-size: 1.3rem; cursor: pointer;
  display: grid; place-items: center;
}
.appbar .spacer { flex: 1; }

/* ---------- Sidebar ----------------------------------------------------- */
.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  background: var(--surface);
  border-right: 1px solid var(--gray-200);
  padding: 1.25rem 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.sidebar .brand {
  display: flex; align-items: center; gap: .55rem;
  font-weight: 800; font-size: 1.15rem; letter-spacing: -.02em;
  color: var(--ink); text-decoration: none; padding: .2rem .3rem;
}
.sidebar .brand .logo {
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff; display: grid; place-items: center; font-size: .95rem; font-weight: 800;
}
.sidebar .brand small { display: block; font-size: .68rem; font-weight: 600; color: var(--gray-500); letter-spacing: .02em; }

.nav-group { display: flex; flex-direction: column; gap: 2px; }
.nav-group .label {
  font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--gray-400); padding: .5rem .6rem .2rem;
}
.nav-link {
  display: flex; align-items: center; gap: .6rem;
  padding: .55rem .6rem; border-radius: var(--radius-sm);
  color: var(--gray-600); text-decoration: none; font-size: .95rem; font-weight: 500;
  min-height: 40px;
}
.nav-link .ico { font-size: 1.05rem; width: 1.4rem; text-align: center; flex: none; }
.nav-link:hover { background: var(--gray-100); color: var(--ink); }
.nav-link.active { background: var(--blue-soft); color: var(--blue-700); font-weight: 650; }
.nav-link .done { margin-left: auto; color: var(--green); font-size: .85rem; }

/* Track toggle in sidebar */
.track-toggle {
  display: flex; background: var(--gray-100); border-radius: 999px; padding: 3px; gap: 3px;
}
.track-toggle button {
  flex: 1; border: 0; background: transparent; cursor: pointer;
  padding: .45rem .3rem; border-radius: 999px; font-size: .82rem; font-weight: 650; color: var(--gray-500);
  min-height: 36px;
}
.track-toggle button.on { background: var(--surface); color: var(--blue-700); box-shadow: var(--shadow-sm); }
.track-caption { font-size: .72rem; color: var(--gray-400); text-align: center; margin-top: .35rem; }

/* Mini progress in sidebar */
.side-progress { background: var(--gray-50); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: .75rem .85rem; }
.side-progress .row { display: flex; justify-content: space-between; align-items: baseline; font-size: .8rem; color: var(--gray-500); }
.side-progress .streak { font-weight: 700; color: var(--amber-ink); }

/* ---------- Sidebar as drawer on mobile --------------------------------- */
.scrim { display: none; position: fixed; inset: 0; background: rgba(15,23,42,.4); z-index: 45; }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .appbar { display: flex; }
  .sidebar {
    position: fixed; top: 0; left: 0; z-index: 50;
    width: min(84vw, 320px); height: 100vh;
    transform: translateX(-105%); transition: transform .22s ease;
    box-shadow: var(--shadow-lg);
  }
  body.nav-open .sidebar { transform: translateX(0); }
  body.nav-open .scrim { display: block; }
  .main { padding-left: 1rem; padding-right: 1rem; }
}

/* ---------- Typography -------------------------------------------------- */
h1 { font-size: clamp(1.6rem, 4vw, 2.1rem); line-height: 1.2; letter-spacing: -.02em; margin: 1.5rem 0 .5rem; }
h2 { font-size: 1.35rem; letter-spacing: -.01em; margin: 2rem 0 .6rem; color: var(--ink); }
h3 { font-size: 1.08rem; margin: 1.4rem 0 .4rem; color: var(--green-dark); }
p { margin: .6rem 0; }
a { color: var(--blue-700); text-underline-offset: 2px; }
.lead { font-size: 1.08rem; color: var(--gray-600); }
.eyebrow { font-size: .78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--blue); }
small, .muted { color: var(--gray-500); }
hr { border: 0; border-top: 1px solid var(--gray-200); margin: 2rem 0; }
ul, ol { padding-left: 1.3rem; }
li { margin: .3rem 0; }

/* ---------- Cards / callouts (kept + expanded) -------------------------- */
.card { background: var(--surface); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 1.1rem 1.25rem; margin: 1rem 0; box-shadow: var(--shadow-sm); }
.target { background: var(--blue-soft); border-left: 4px solid var(--blue); padding: .8rem 1rem; margin: 1rem 0; border-radius: var(--radius-sm); }
.step  { background: var(--green-soft); border-left: 3px solid var(--green); padding: .9rem 1.1rem; margin: .6rem 0; border-radius: var(--radius-sm); }
.step strong { color: var(--green-dark); }
.warn  { background: var(--red-soft); border-left: 4px solid var(--red); padding: .8rem 1rem; margin: 1rem 0; border-radius: var(--radius-sm); }
.myth  { background: var(--amber-soft); border-left: 4px solid var(--amber); padding: .8rem 1rem; margin: 1rem 0; border-radius: var(--radius-sm); }
.myth strong { color: var(--amber-ink); }
.template { background: #fffbeb; padding: 1rem; margin: 1rem 0; border-radius: var(--radius-sm); border-left: 3px solid var(--amber); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .88rem; white-space: pre-wrap; }
.model { background: var(--surface); border: 1px solid var(--gray-200); padding: 1rem 1.25rem; margin: 1rem 0; border-radius: var(--radius); }
.model .annot { color: var(--blue-700); font-size: .82rem; font-style: italic; background: var(--blue-soft); padding: .4rem .6rem; border-radius: 6px; display: block; margin: .35rem 0; }
.callout { background: var(--blue-soft); padding: .8rem 1rem; border-radius: var(--radius-sm); margin: 1rem 0; }
blockquote { border-left: 3px solid var(--gray-300); padding-left: 1rem; color: var(--gray-600); margin: 1rem 0; }
code { background: var(--gray-100); padding: .1rem .35rem; border-radius: 4px; font-size: .9em; }

/* Source citation chip */
.src { font-size: .8rem; color: var(--gray-500); }
.src a { color: var(--gray-600); }
sup.cite a { text-decoration: none; color: var(--blue); font-weight: 700; font-size: .72em; }

/* ---------- Pills / tags ------------------------------------------------ */
.pill { display: inline-block; background: var(--gray-100); color: var(--gray-600); padding: .12rem .55rem; border-radius: 999px; font-size: .76rem; font-weight: 600; margin: 0 .15rem .15rem 0; }
.pill.blue { background: var(--blue-soft); color: var(--blue-700); }
.pill.green { background: var(--green-soft); color: var(--green-dark); }
.pill.amber { background: var(--amber-soft); color: var(--amber-ink); }
.pill.purple{ background: var(--purple-soft); color: var(--purple); }
.badge-time { font-size: .74rem; color: var(--gray-500); font-weight: 600; }

/* Track-only content visibility (toggled by app.js) */
[data-track] { }
body[data-active-track="academic"] [data-track="general"],
body[data-active-track="general"]  [data-track="academic"] { display: none !important; }

/* ---------- Tables ------------------------------------------------------ */
.table-wrap { overflow-x: auto; margin: 1rem 0; border-radius: var(--radius-sm); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { border: 1px solid var(--gray-200); padding: .55rem .7rem; text-align: left; vertical-align: top; }
th { background: var(--gray-100); font-size: .85rem; letter-spacing: .01em; }
tbody tr:nth-child(even) { background: var(--gray-50); }

/* ---------- Buttons ----------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: var(--tap); padding: .6rem 1.15rem;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  font-family: inherit; font-size: .98rem; font-weight: 650; cursor: pointer;
  text-decoration: none; background: var(--gray-100); color: var(--ink);
  transition: transform .05s ease, background .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--blue); color: #fff; box-shadow: var(--shadow-sm); }
.btn.primary:hover { background: var(--blue-700); }
.btn.ghost { background: transparent; border-color: var(--gray-300); color: var(--gray-600); }
.btn.ghost:hover { background: var(--gray-100); }
.btn.success { background: var(--green); color: #fff; }
.btn.big { font-size: 1.05rem; padding: .8rem 1.5rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin: 1rem 0; }

/* ---------- Progress bars ----------------------------------------------- */
.progress { height: 8px; background: var(--gray-200); border-radius: 999px; overflow: hidden; }
.progress > span { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), var(--purple)); border-radius: 999px; transition: width .4s ease; }
.progress.green > span { background: var(--green); }

/* ---------- Hero / home ------------------------------------------------- */
.hero { padding: 1.5rem 0 .5rem; }
.hero h1 { margin-top: .5rem; }

/* Skill grid + tiles */
.skill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .75rem; margin: 1rem 0; }
.skill-card {
  display: flex; flex-direction: column; gap: .2rem;
  background: var(--surface); padding: 1rem; border-radius: var(--radius);
  text-decoration: none; color: inherit; border: 1px solid var(--gray-200); box-shadow: var(--shadow-sm);
}
.skill-card:hover { border-color: var(--blue); box-shadow: var(--shadow); transform: translateY(-1px); transition: .15s; }
.skill-card .ico { font-size: 1.5rem; }
.skill-card strong { color: var(--ink); font-size: 1.02rem; }
.skill-card span { color: var(--gray-500); font-size: .82rem; }
.skill-card .progress { margin-top: .5rem; }

/* Dashboard next-action */
.next-action {
  background: linear-gradient(135deg, #eef4ff, #f2ecfe);
  border: 1px solid #dbe4ff; border-radius: var(--radius-lg);
  padding: 1.4rem 1.4rem; margin: 1.2rem 0; box-shadow: var(--shadow-sm);
}
.next-action .eyebrow { color: var(--purple); }
.next-action h2 { margin: .3rem 0 .5rem; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px,1fr)); gap: .75rem; margin: 1rem 0; }
.stat { background: var(--surface); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: .9rem 1rem; box-shadow: var(--shadow-sm); }
.stat .num { font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; }
.stat .lbl { font-size: .78rem; color: var(--gray-500); font-weight: 600; }

/* ---------- Stepper (micro-lessons: one card at a time) ----------------- */
.stepper { margin: 1.2rem 0; }
.stepper-head { display: flex; align-items: center; gap: .75rem; margin-bottom: .8rem; }
.stepper-head .progress { flex: 1; }
.stepper-head .count { font-size: .8rem; color: var(--gray-500); font-weight: 600; white-space: nowrap; }
.lesson-card {
  background: var(--surface); border: 1px solid var(--gray-200); border-radius: var(--radius-lg);
  padding: 1.3rem 1.4rem; box-shadow: var(--shadow); animation: cardin .25s ease;
}
@keyframes cardin { from { opacity: 0; transform: translateY(6px);} to {opacity:1; transform:none;} }
.lesson-card > h2:first-child, .lesson-card > h3:first-child { margin-top: 0; }
.lesson-meta { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; margin-bottom: .6rem; }
.stepper-nav { display: flex; justify-content: space-between; align-items: center; gap: .75rem; margin-top: 1.1rem; }
.dot-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin: 1rem 0 0; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--gray-300); cursor: pointer; border: 0; padding: 0; }
.dot.on { background: var(--blue); transform: scale(1.25); }
.dot.done { background: var(--green); }

/* “Drill” assignment block inside lessons */
.drill { background: var(--purple-soft); border-left: 4px solid var(--purple); padding: .85rem 1.05rem; border-radius: var(--radius-sm); margin: 1rem 0; }
.drill strong { color: var(--purple); }

/* ---------- Quiz -------------------------------------------------------- */
.quiz { background: var(--surface); border: 1px solid var(--gray-200); border-radius: var(--radius); padding: 1.1rem 1.2rem; margin: 1.2rem 0; box-shadow: var(--shadow-sm); }
.quiz .q { font-weight: 650; margin-bottom: .6rem; }
.quiz .opts { display: flex; flex-direction: column; gap: .5rem; }
.quiz .opt {
  text-align: left; width: 100%; min-height: var(--tap);
  padding: .6rem .9rem; border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  background: var(--surface); font: inherit; cursor: pointer;
}
.quiz .opt:hover { border-color: var(--blue); background: var(--blue-soft); }
.quiz .opt.correct { border-color: var(--green); background: var(--green-soft); }
.quiz .opt.wrong { border-color: var(--red); background: var(--red-soft); }
.quiz .opt:disabled { cursor: default; }
.quiz .explain { margin-top: .7rem; padding: .7rem .9rem; border-radius: var(--radius-sm); background: var(--gray-50); font-size: .92rem; display: none; }
.quiz .explain.show { display: block; }
.quiz .explain.ok { background: var(--green-soft); }
.quiz .explain.no { background: var(--amber-soft); }

/* ---------- Checkable tasks (study plan) -------------------------------- */
.tasklist { list-style: none; padding: 0; margin: 1rem 0; }
.task-item {
  display: flex; align-items: flex-start; gap: .7rem;
  padding: .7rem .8rem; border: 1px solid var(--gray-200); border-radius: var(--radius-sm);
  background: var(--surface); margin-bottom: .5rem;
}
.task-item input { width: 22px; height: 22px; margin-top: .1rem; flex: none; accent-color: var(--green); cursor: pointer; }
.task-item.done label { text-decoration: line-through; color: var(--gray-400); }
.task-item label { cursor: pointer; }

/* Week accordion */
.week { border: 1px solid var(--gray-200); border-radius: var(--radius); margin: .6rem 0; overflow: hidden; background: var(--surface); }
.week > summary { padding: .85rem 1rem; font-weight: 650; cursor: pointer; display: flex; align-items: center; gap: .6rem; list-style: none; }
.week > summary::-webkit-details-marker { display: none; }
.week > summary .chev { margin-left: auto; color: var(--gray-400); transition: transform .2s; }
.week[open] > summary .chev { transform: rotate(90deg); }
.week .week-body { padding: .2rem 1rem 1rem; }
.week .milestone { font-size: .85rem; color: var(--green-dark); background: var(--green-soft); padding: .4rem .7rem; border-radius: 6px; margin-top: .5rem; }

/* ---------- Tools: timer, flashcards, error log ------------------------- */
.timer-face { font-size: clamp(3rem, 14vw, 5rem); font-weight: 800; letter-spacing: -.03em; text-align: center; font-variant-numeric: tabular-nums; }
.timer-ring { display: grid; place-items: center; margin: 1rem auto; }

.flashcard {
  min-height: 220px; border-radius: var(--radius-lg); border: 1px solid var(--gray-200);
  background: var(--surface); box-shadow: var(--shadow); padding: 1.5rem; cursor: pointer;
  display: grid; place-items: center; text-align: center; font-size: 1.2rem; user-select: none;
}
.flashcard .hint { position: absolute; bottom: 10px; font-size: .72rem; color: var(--gray-400); }
.fc-wrap { position: relative; }
.box-tags { display: flex; gap: .4rem; flex-wrap: wrap; justify-content: center; margin: .6rem 0; }

.log-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: .5rem; align-items: start; }
input, select, textarea {
  font: inherit; padding: .5rem .6rem; border: 1px solid var(--gray-300); border-radius: var(--radius-sm);
  background: var(--surface); color: var(--ink); width: 100%; min-height: var(--tap);
}
textarea { min-height: 3rem; resize: vertical; line-height: 1.5; }
label.field { display: block; font-size: .82rem; font-weight: 650; color: var(--gray-600); margin: .6rem 0 .2rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
@media (max-width: 560px){ .field-row { grid-template-columns: 1fr; } }

/* ---------- Bottom in-page nav ------------------------------------------ */
.pagenav { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--gray-200); }
.pagenav a { text-decoration: none; font-weight: 600; }

/* ---------- Toast ------------------------------------------------------- */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px);
  background: var(--ink); color: #fff; padding: .7rem 1.1rem; border-radius: 999px;
  font-size: .9rem; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; z-index: 100;
  transition: opacity .2s, transform .2s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Utilities --------------------------------------------------- */
.center { text-align: center; }
.hidden { display: none !important; }
.mt0 { margin-top: 0; } .mb0 { margin-bottom: 0; }
.stack > * + * { margin-top: .8rem; }

/* ---------- Practice sets ------------------------------------------------ */
.passage {
  background: var(--surface); border: 1px solid var(--gray-200); border-radius: 12px;
  padding: 1.1rem 1.2rem; margin: 1rem 0; line-height: 1.75; font-size: .95rem;
}
.passage h3 { margin-top: 0; }
.passage p { margin: .6rem 0; }
.passage .pmark { font-weight: 700; color: var(--blue-700); margin-right: .35rem; }
.pq {
  border: 1px solid var(--gray-200); border-radius: 10px; background: var(--surface);
  padding: .8rem .9rem; margin: .6rem 0;
}
.pq .stem { margin: 0 0 .5rem; font-weight: 600; }
.pq .stem .qn { color: var(--blue-700); margin-right: .3rem; }
.pq .opts { display: flex; flex-wrap: wrap; gap: .4rem; }
.pq select, .pq input[type="text"] {
  width: auto; min-width: 200px; max-width: 100%;
  padding: .45rem .6rem; border: 1px solid var(--gray-300); border-radius: 8px;
  font: inherit; font-size: .9rem; background: #fff;
}
.pq .limit { font-size: .78rem; color: var(--gray-500); margin-top: .3rem; }
.pq.right { border-color: var(--green); background: var(--green-soft); }
.pq.miss  { border-color: var(--red);   background: var(--red-soft); }
.pq .verdict { font-size: .85rem; font-weight: 700; margin-top: .5rem; }
.pq.right .verdict { color: var(--green-dark); }
.pq.miss  .verdict { color: var(--red); }
.pq .why { font-size: .88rem; margin-top: .35rem; color: var(--gray-600);
  border-top: 1px dashed var(--gray-300); padding-top: .4rem; }
.score-box {
  border: 2px solid var(--blue); border-radius: 14px; background: var(--blue-soft);
  padding: 1rem 1.2rem; margin: 1rem 0; text-align: center;
}
.score-box .big { font-size: 2rem; font-weight: 800; color: var(--blue-700); }
.tier-badge { font-size: .72rem; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; padding: .15rem .55rem; border-radius: 999px; }
.tier-badge.builder { background: var(--green-soft); color: var(--green-dark); }
.tier-badge.core    { background: var(--blue-soft);  color: var(--blue-700); }
.tier-badge.stretch { background: var(--purple-soft); color: var(--purple); }
.set-card { cursor: pointer; }
.set-card:hover { border-color: var(--blue); }

/* ---------- Learn cycle: ① Memorise · ② Apply · ③ Make it yours ---------- */
.phase-head { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; margin-bottom: .7rem; }
.phase {
  display: inline-block; font-size: .72rem; font-weight: 800; letter-spacing: .02em;
  padding: .22rem .65rem; border-radius: 999px; white-space: nowrap;
}
.phase.p1 { background: var(--purple-soft); color: var(--purple); }
.phase.p2 { background: var(--blue-soft);   color: var(--blue-700); }
.phase.p3 { background: var(--green-soft);  color: var(--green-dark); }
.phase-hint { font-size: .78rem; color: var(--gray-500); }

.recall {
  background: var(--surface); border: 1px solid var(--gray-200);
  border-left: 4px solid var(--purple); border-radius: 12px;
  padding: .9rem 1rem; margin: 1rem 0;
}
.ritem {
  display: block; width: 100%; text-align: left; cursor: pointer;
  border: 1px solid var(--gray-200); border-radius: 10px; background: var(--gray-50);
  padding: .6rem .8rem; margin: .45rem 0; min-height: var(--tap);
}
.ritem:hover, .ritem:focus-visible { border-color: var(--purple); outline: none; }
.ritem .cue { display: block; font-weight: 600; font-size: .92rem; }
.ritem .cue::after { content: "  ·  tap to check"; font-weight: 400; font-size: .74rem; color: var(--gray-400); }
.ritem.open .cue::after { content: ""; }
.ritem .ans { display: none; margin-top: .4rem; font-size: .9rem; color: var(--gray-600);
  border-top: 1px dashed var(--gray-300); padding-top: .4rem; }
.ritem.open { background: var(--purple-soft); border-color: var(--purple); }
.ritem.open .ans { display: block; }

.your-turn {
  background: var(--surface); border: 1px dashed var(--green-dark);
  border-radius: 12px; padding: .9rem 1rem; margin: 1rem 0;
}
.your-turn .prompt { margin: 0 0 .6rem; font-size: .95rem; }
.own-input {
  width: 100%; min-height: 88px; resize: vertical;
  padding: .6rem .7rem; border: 1px solid var(--gray-300); border-radius: 10px;
  font: inherit; font-size: .92rem; line-height: 1.55; background: #fff;
}
.own-input:focus { border-color: var(--green-dark); outline: none; }
.your-turn .btn-row { margin-top: .6rem; }
.your-turn .sample {
  margin-top: .8rem; padding: .7rem .8rem; border-radius: 10px;
  background: var(--gray-50); border: 1px solid var(--gray-200); font-size: .9rem;
}
.your-turn .sample-head { font-size: .76rem; font-weight: 700; color: var(--gray-500);
  text-transform: uppercase; letter-spacing: .03em; margin-bottom: .4rem; }

/* ---------- Trademark note ---------------------------------------------- */
.tm-note {
  margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--gray-200);
  font-size: .72rem; line-height: 1.5; color: var(--gray-400);
}

@media print {
  .sidebar, .appbar, .scrim, .stepper-nav, .btn, .pagenav { display: none !important; }
  .app { grid-template-columns: 1fr; }
  .lesson-card { box-shadow: none; }
}