/* FunLearn — app shell + screen styles
   Full-screen mobile PWA. Builds on tokens.css. */

/* ─── Reset & viewport ─────────────────────────────────────────────────── */
html, body {
  margin: 0; padding: 0;
  height: 100%;
  overscroll-behavior-y: contain;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
body {
  background: var(--bg-canvas);
  color: var(--text-primary);
  font-family: var(--font-ui);
}

/* When running as installed PWA, body fills the screen */
@supports (padding: max(0px)) {
  body {
    padding-left:   env(safe-area-inset-left);
    padding-right:  env(safe-area-inset-right);
  }
}

/* ─── App root: stacked screens, only one visible ─────────────────────── */
.app-root {
  position: fixed; inset: 0;
  display: flex; flex-direction: column;
  background: var(--bg-canvas);
  overflow: hidden;
}

.screen {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  background: var(--bg-canvas);
  color: var(--text-primary);
  opacity: 0;
  transform: translateX(28px);
  pointer-events: none;
  transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
}
.screen.is-active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

/* The scrolling content area inside each screen */
.scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-top: env(safe-area-inset-top);
  padding-bottom: calc(96px + env(safe-area-inset-bottom));
}
.scroll::-webkit-scrollbar { display: none; }

.pad-x { padding-left: 20px; padding-right: 20px; }

/* ─── Top nav (back chrome inside detail screens) ─────────────────────── */
.topnav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px 8px;
  gap: 12px;
}
.topnav-back {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border-hair);
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 8px 12px 8px 10px;
  border-radius: 999px;
  font-size: 14px; font-weight: 600;
  cursor: pointer; user-select: none;
  transition: transform var(--dur-2) var(--ease-spring), background var(--dur-2) var(--ease-out);
}
.topnav-back:active { transform: scale(0.96); }
.topnav-back svg { width: 14px; height: 14px; }
.topnav-meta {
  font-family: var(--font-mono);
  font-size: 10px; letter-spacing: 0.10em;
  text-transform: uppercase; font-weight: 700;
  color: var(--text-tertiary);
}

/* ─── Header / greeting ───────────────────────────────────────────────── */
.greet { display: flex; align-items: start; justify-content: space-between; gap: 12px; padding: 24px 20px 16px; }
.greet .hi {
  font-family: var(--font-display);
  font-size: 30px; line-height: 1.06; letter-spacing: -0.018em;
  font-weight: 400; margin: 0;
}
.greet .hi em { font-style: italic; color: var(--accent); font-weight: 300; }
.greet .date {
  font-size: 11px; color: var(--text-tertiary);
  letter-spacing: 0.06em; text-transform: uppercase;
  font-weight: 700; margin-bottom: 4px;
}
.greet .av {
  width: 40px; height: 40px; border-radius: 999px; flex-shrink: 0;
  background: var(--accent);
  color: var(--text-on-accent);
  font-family: var(--font-display); font-size: 18px; font-weight: 500;
  display: grid; place-items: center;
}

/* ─── Stat row ────────────────────────────────────────────────────────── */
.stat-row { display: flex; gap: 8px; padding: 0 20px 18px; }
.stat {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-hair);
  border-radius: var(--r-l);
  padding: 12px 14px;
  display: flex; align-items: center; gap: 10px;
}
.stat .num { font-family: var(--font-display); font-size: 22px; font-weight: 500; letter-spacing: -0.01em; line-height: 1; }
.stat .lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; color: var(--text-tertiary); }
.stat .glyph {
  width: 32px; height: 32px; border-radius: 10px;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 14px; font-weight: 600;
}

/* ─── Section heading ─────────────────────────────────────────────────── */
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 24px 20px 12px;
}
.section-head h2 {
  margin: 0; font-family: var(--font-display);
  font-size: 22px; font-weight: 400; letter-spacing: -0.014em;
}
.section-head h2 em { font-style: italic; color: var(--accent); font-weight: 300; }
.section-head .seeall {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.10em; text-transform: uppercase;
  font-weight: 700; color: var(--text-tertiary);
  border: none; background: transparent; cursor: pointer;
}

/* ─── Cards ───────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-hair);
  border-radius: var(--r-l);
  padding: 18px;
  display: block; width: 100%;
  color: inherit; text-decoration: none;
  text-align: left;
  cursor: pointer;
  transition: transform var(--dur-2) var(--ease-spring), box-shadow var(--dur-2) var(--ease-out);
  font: inherit;
}
.card:active { transform: scale(0.985); box-shadow: var(--shadow-2); }
.card.is-accent {
  border-color: transparent;
  background:
    radial-gradient(120% 80% at 100% 0%, var(--accent-glow) 0%, transparent 60%),
    var(--bg-surface);
}

/* Today's lesson card */
.today {
  margin: 0 20px 20px;
  padding: 22px;
  border-radius: var(--r-xl);
  background:
    radial-gradient(140% 90% at 100% 0%, var(--accent-glow) 0%, transparent 60%),
    var(--bg-surface);
  border: 1px solid var(--border-hair);
  position: relative; overflow: hidden;
  display: block; width: calc(100% - 40px);
  text-align: left; color: inherit; cursor: pointer;
  font: inherit;
}
.today:active { transform: scale(0.99); }
.today .eyebrow {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700;
  color: var(--accent);
}
.today .ttl {
  font-family: var(--font-display); font-size: 26px;
  font-weight: 400; letter-spacing: -0.018em; line-height: 1.1;
  margin: 8px 0 6px;
}
.today .ttl em { font-style: italic; color: var(--accent); font-weight: 300; }
.today .quote {
  font-family: var(--font-display); font-style: italic;
  font-size: 15px; line-height: 1.5; color: var(--text-secondary);
  border-left: 2px solid var(--accent); padding-left: 12px; margin: 14px 0 4px;
}
.today .attribution {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.06em; color: var(--text-tertiary);
  text-transform: uppercase; font-weight: 600;
}
.today .cta {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 16px;
  padding: 10px 14px; border-radius: 999px;
  background: var(--accent); color: var(--text-on-accent);
  font-size: 13px; font-weight: 700;
}
.today .cta svg { width: 12px; height: 12px; }

/* Daily quest */
.quest {
  margin: 0 20px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-hair);
  border-radius: var(--r-l);
  padding: 16px 18px;
}
.quest .row { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.quest .ttl { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; }
.quest .lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--text-tertiary); font-weight: 700; }
.quest .meta { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }
.quest .bar { height: 6px; border-radius: 999px; background: var(--bg-inset); margin-top: 12px; overflow: hidden; }
.quest .bar > div { height: 100%; background: var(--accent); border-radius: 999px; transition: width var(--dur-3) var(--ease-out); }

/* Continue learning row */
.continue { display: flex; gap: 12px; overflow-x: auto; padding: 0 20px 8px; scrollbar-width: none; }
.continue::-webkit-scrollbar { display: none; }
.continue .card {
  min-width: 240px; max-width: 280px;
  padding: 16px;
}
.continue .pill {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.continue .name { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; margin: 10px 0 4px; line-height: 1.2; }
.continue .sub { color: var(--text-secondary); font-size: 13px; }
.continue .prog { height: 4px; border-radius: 999px; background: var(--bg-inset); margin-top: 12px; overflow: hidden; }
.continue .prog > div { height: 100%; background: var(--accent); }

/* Recently-added list */
.recent { display: flex; flex-direction: column; gap: 8px; padding: 0 20px; }
.recent .item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px; border-radius: var(--r-m);
  border: 1px solid var(--border-hair);
  background: var(--bg-surface);
  cursor: pointer;
}
.recent .item:active { background: var(--bg-subtle); }
.recent .ico {
  width: 40px; height: 40px; border-radius: 12px;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 16px; font-weight: 600;
  flex-shrink: 0;
}
.recent .name { font-size: 14px; font-weight: 600; line-height: 1.3; color: var(--text-primary); }
.recent .meta { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-tertiary); font-weight: 700; margin-top: 4px; }

/* ─── Bottom tab bar ──────────────────────────────────────────────────── */
.tabbar {
  position: absolute;
  left: 16px; right: 16px;
  bottom: calc(16px + env(safe-area-inset-bottom));
  height: 64px;
  background: var(--bg-glass);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid var(--bg-glass-stroke);
  border-radius: 999px;
  box-shadow: var(--shadow-3);
  display: flex;
  align-items: center; justify-content: space-around;
  padding: 0 8px;
  z-index: 50;
}
.tabbar button {
  flex: 1;
  background: transparent; border: none;
  color: var(--text-tertiary); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 8px 4px;
  font-family: var(--font-mono); font-size: 9px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  transition: color var(--dur-2) var(--ease-out), transform var(--dur-2) var(--ease-spring);
}
.tabbar button svg { width: 22px; height: 22px; }
.tabbar button[aria-pressed="true"] { color: var(--accent); }
.tabbar button:active { transform: scale(0.92); }

/* Tab bar is hidden on screens that need a back chrome */
.app-root[data-show-tabbar="false"] .tabbar { display: none; }

/* ─── Library: category cards ─────────────────────────────────────────── */
.cat-stack { display: flex; flex-direction: column; gap: 14px; padding: 4px 20px 24px; }
.cat-card {
  position: relative;
  border-radius: var(--r-xl);
  padding: 22px 22px 18px;
  overflow: hidden;
  border: 1px solid var(--border-hair);
  background: var(--bg-surface);
  display: block; cursor: pointer; color: inherit; text-align: left;
  font: inherit; width: 100%;
}
.cat-card::after {
  content: ''; position: absolute;
  inset: auto -20% -30% auto;
  width: 240px; height: 240px;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  opacity: 0.85; pointer-events: none;
}
.cat-card .eyebrow {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700;
  color: var(--accent);
}
.cat-card .h {
  font-family: var(--font-display); font-size: 32px;
  font-weight: 400; letter-spacing: -0.022em; line-height: 1.04;
  margin: 6px 0 4px;
}
.cat-card .h em { font-style: italic; color: var(--accent); font-weight: 300; }
.cat-card .desc { color: var(--text-secondary); font-size: 14px; line-height: 1.5; max-width: 36ch; }
.cat-card .meta { display: flex; gap: 14px; margin-top: 14px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-tertiary); font-weight: 700; }
.cat-card .bar { height: 5px; border-radius: 999px; background: var(--bg-inset); margin-top: 14px; overflow: hidden; }
.cat-card .bar > div { height: 100%; background: var(--accent); }

/* ─── Category Detail ─────────────────────────────────────────────────── */
.cat-hero {
  padding: 20px 20px 12px;
  position: relative;
}
.cat-hero::after {
  content: ''; position: absolute;
  inset: auto -10% -20% auto;
  width: 260px; height: 260px;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  pointer-events: none; opacity: 0.7;
}
.cat-hero .eyebrow { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.cat-hero .h {
  font-family: var(--font-display); font-size: 44px;
  font-weight: 400; letter-spacing: -0.026em; line-height: 1.02;
  margin: 8px 0 8px;
}
.cat-hero .h em { font-style: italic; color: var(--accent); font-weight: 300; }
.cat-hero .desc { color: var(--text-secondary); font-size: 15px; max-width: 36ch; line-height: 1.5; }

.cat-stats { display: flex; gap: 8px; padding: 4px 20px 18px; }
.cat-stats .stat { flex: 1; padding: 12px; }

.row-section { padding: 8px 0 16px; }
.row-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 12px 20px 10px;
}
.row-head h3 { margin: 0; font-family: var(--font-display); font-size: 22px; font-weight: 400; letter-spacing: -0.014em; }
.row-head h3 em { font-style: italic; color: var(--accent); font-weight: 300; }

.track-row {
  display: flex; gap: 12px; overflow-x: auto;
  padding: 4px 20px 8px;
  scrollbar-width: none;
}
.track-row::-webkit-scrollbar { display: none; }
.track-card {
  min-width: 240px; max-width: 280px;
  padding: 16px;
  border-radius: var(--r-l);
  border: 1px solid var(--border-hair);
  background: var(--bg-surface);
  cursor: pointer;
  display: block; color: inherit; text-align: left;
  font: inherit;
}
.track-card.is-locked { opacity: 0.55; }
.track-card .tag {
  display: inline-block; padding: 3px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
}
.track-card .name { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; margin: 10px 0 6px; line-height: 1.2; }
.track-card .sub { color: var(--text-secondary); font-size: 13px; line-height: 1.4; }
.track-card .progressrow { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.track-card .prog { flex: 1; height: 4px; border-radius: 999px; background: var(--bg-inset); overflow: hidden; }
.track-card .prog > div { height: 100%; background: var(--accent); }
.track-card .lvl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-tertiary); font-weight: 700; }

/* Featured callout */
.featured {
  margin: 8px 20px 20px;
  padding: 18px;
  border-radius: var(--r-xl);
  background:
    radial-gradient(140% 90% at 100% 0%, var(--accent-glow) 0%, transparent 60%),
    var(--bg-surface);
  border: 1px solid var(--border-hair);
  cursor: pointer;
  position: relative; overflow: hidden;
  text-align: left; color: inherit; display: block;
  font: inherit; width: calc(100% - 40px);
}
.featured .eyebrow { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.featured .name { font-family: var(--font-display); font-size: 24px; font-weight: 400; letter-spacing: -0.018em; margin: 8px 0 6px; line-height: 1.1; }
.featured .name em { font-style: italic; color: var(--accent); font-weight: 300; }
.featured .sub { color: var(--text-secondary); font-size: 14px; }

/* ─── Track Detail ────────────────────────────────────────────────────── */
.track-hero {
  padding: 20px 20px 16px;
  position: relative;
}
.track-hero::after {
  content: ''; position: absolute;
  inset: auto -10% -20% auto;
  width: 280px; height: 280px;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  pointer-events: none; opacity: 0.8;
}
.track-hero .label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.track-hero .h {
  font-family: var(--font-display); font-size: 36px;
  font-weight: 400; letter-spacing: -0.024em; line-height: 1.04;
  margin: 8px 0 0;
}
.track-hero .h em { font-style: italic; color: var(--accent); font-weight: 300; }

.track-stats { display: flex; gap: 8px; padding: 8px 20px 20px; }
.track-stats .stat { flex: 1; padding: 10px 12px; display: block; }
.track-stats .stat .num { display: block; }
.track-stats .stat .lbl { display: block; margin-top: 4px; }

.intro-callout {
  margin: 0 20px 24px;
  padding: 16px 18px;
  border-radius: var(--r-l);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
}
.intro-callout .lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.intro-callout .ttl { font-family: var(--font-display); font-size: 22px; font-weight: 400; letter-spacing: -0.014em; margin: 6px 0; line-height: 1.1; }
.intro-callout .ttl em { font-style: italic; font-weight: 300; }
.intro-callout .body { color: var(--text-secondary); font-size: 14px; line-height: 1.5; }

.spine { padding: 0 20px 40px; position: relative; }
.spine::before {
  content: ''; position: absolute;
  left: calc(20px + 24px - 1px); top: 12px; bottom: 12px;
  width: 2px; background: var(--border-hair);
}
.chapter {
  padding: 16px 8px 8px; margin: 6px 0 8px 56px;
}
.chapter .lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.chapter .ttl { font-family: var(--font-display); font-size: 22px; font-weight: 400; letter-spacing: -0.014em; margin: 4px 0; line-height: 1.1; }
.chapter .ttl em { font-style: italic; font-weight: 300; }

.level {
  display: flex; gap: 16px; align-items: stretch;
  padding: 10px 0;
  cursor: pointer;
}
.level[data-locked="true"] { cursor: not-allowed; opacity: 0.45; }
.level .dot {
  flex-shrink: 0;
  width: 48px; height: 48px; border-radius: 999px;
  background: var(--bg-surface);
  border: 2px solid var(--border);
  display: grid; place-items: center;
  font-family: var(--font-display); font-weight: 600; font-size: 16px;
  color: var(--text-secondary);
  position: relative; z-index: 2;
  transition: transform var(--dur-2) var(--ease-spring), box-shadow var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}
.level:active:not([data-locked="true"]) .dot { transform: scale(0.92); }
.level[data-state="mastered"] .dot { background: var(--accent); color: var(--text-on-accent); border-color: var(--accent); }
.level[data-state="current"] .dot {
  background: var(--bg-surface); color: var(--accent); border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}
.level[data-state="unlocked"] .dot { border-color: var(--accent); color: var(--accent); }
.level[data-capstone="true"] .dot { border-radius: 14px; }

.level .body {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border-hair);
  border-radius: var(--r-m);
}
.level[data-state="current"] .body { border-color: var(--accent); box-shadow: var(--shadow-2); }

.level .ttl {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  font-family: var(--font-display); font-size: 17px; font-weight: 500; letter-spacing: -0.01em;
}
.level .xp { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.level .detail { color: var(--text-secondary); font-size: 13px; line-height: 1.45; margin-top: 4px; }
.level .lessonKind {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-tertiary); font-weight: 700; margin-top: 8px;
}
.level .lessonKind svg { width: 12px; height: 12px; }

/* ─── Lesson player ───────────────────────────────────────────────────── */
.lesson {
  display: flex; flex-direction: column; height: 100%;
}
.lesson-top {
  padding: 12px 16px 8px;
  display: flex; align-items: center; gap: 12px;
}
.lesson-bar {
  flex: 1; height: 4px; border-radius: 999px; background: var(--bg-inset); overflow: hidden;
}
.lesson-bar > div { height: 100%; background: var(--accent); transition: width var(--dur-3) var(--ease-out); }
.lesson-close {
  width: 36px; height: 36px; border-radius: 999px;
  border: 1px solid var(--border-hair); background: var(--bg-surface);
  display: grid; place-items: center; cursor: pointer; flex-shrink: 0;
  color: var(--text-primary);
}
.lesson-close svg { width: 14px; height: 14px; }
.lesson-content {
  flex: 1; overflow-y: auto; padding: 20px 20px 120px;
  -webkit-overflow-scrolling: touch;
}
.lesson-foot {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 12px 20px calc(20px + env(safe-area-inset-bottom));
  background: linear-gradient(to top, var(--bg-canvas) 60%, transparent);
}
.lesson-foot .btn {
  width: 100%; padding: 14px 20px;
  background: var(--accent); color: var(--text-on-accent);
  border: none; border-radius: 999px;
  font-family: var(--font-ui); font-size: 15px; font-weight: 700;
  cursor: pointer;
  transition: transform var(--dur-2) var(--ease-spring), opacity var(--dur-2) var(--ease-out);
}
.lesson-foot .btn:disabled { opacity: 0.4; cursor: not-allowed; }
.lesson-foot .btn:active:not(:disabled) { transform: scale(0.98); }

.lesson-eyebrow {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700;
  color: var(--accent);
}
.lesson-prompt {
  font-family: var(--font-display); font-size: 28px;
  font-weight: 400; letter-spacing: -0.018em; line-height: 1.15;
  margin: 8px 0 12px;
}
.lesson-help { color: var(--text-secondary); font-size: 13px; line-height: 1.5; margin-bottom: 16px; }

/* MCQ options */
.mcq-list { display: flex; flex-direction: column; gap: 10px; }
.mcq-opt {
  display: flex; gap: 12px; align-items: flex-start;
  width: 100%; padding: 14px 16px;
  border: 1px solid var(--border-hair); border-radius: var(--r-m);
  background: var(--bg-surface);
  cursor: pointer; text-align: left; color: inherit;
  font: inherit;
  transition: all var(--dur-2) var(--ease-out);
}
.mcq-opt:disabled { cursor: default; }
.mcq-opt .badge {
  width: 30px; height: 30px; border-radius: 999px;
  display: grid; place-items: center; flex-shrink: 0;
  background: var(--bg-inset); color: var(--text-secondary);
  font-family: var(--font-mono); font-size: 12px; font-weight: 700;
}
.mcq-opt .opt-ttl { font-size: 14px; font-weight: 600; line-height: 1.3; }
.mcq-opt .opt-detail { color: var(--text-secondary); font-size: 12px; line-height: 1.45; margin-top: 4px; }
.mcq-opt[data-state="correct"] {
  border-color: var(--accent); background: var(--accent-soft);
  box-shadow: 0 8px 24px var(--accent-glow);
}
.mcq-opt[data-state="correct"] .badge { background: var(--accent); color: var(--text-on-accent); }
.mcq-opt[data-state="incorrect"] {
  border-color: var(--danger);
  background: color-mix(in srgb, var(--danger) 10%, var(--bg-surface));
}
.mcq-opt[data-state="incorrect"] .badge { background: var(--danger); color: #fff; }
.mcq-opt[data-state="dimmed"] { opacity: 0.5; }

.mcq-explain {
  margin-top: 14px; padding: 14px;
  background: var(--bg-surface); border: 1px solid var(--border-hair);
  border-radius: var(--r-l);
}
.mcq-explain[data-feedback="correct"] { border-color: color-mix(in srgb, var(--accent) 30%, transparent); }
.mcq-explain[data-feedback="incorrect"] { border-color: color-mix(in srgb, var(--danger) 30%, transparent); }
.mcq-explain .hd { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; margin-bottom: 6px; }
.mcq-explain[data-feedback="correct"] .hd { color: var(--accent); }
.mcq-explain[data-feedback="incorrect"] .hd { color: var(--danger); }
.mcq-explain .txt { font-size: 14px; line-height: 1.5; color: var(--text-primary); }
.mcq-explain .src { font-family: var(--font-mono); font-size: 11px; color: var(--text-tertiary); margin-top: 8px; letter-spacing: 0.04em; }

/* Matching */
.match-source {
  padding: 12px; border: 1px solid var(--border-hair); border-radius: var(--r-l);
  background: var(--bg-surface);
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px;
  margin-bottom: 16px;
}
.match-source.is-empty { display: none; }
.match-card {
  padding: 10px 12px; border-radius: var(--r-m);
  background: var(--bg-canvas); border: 1px solid var(--border);
  text-align: left; cursor: pointer; color: inherit;
  display: block;
  font: inherit; width: 100%;
  transition: transform var(--dur-2) var(--ease-spring), background var(--dur-2) var(--ease-out);
}
.match-card[aria-pressed="true"] {
  background: var(--accent-soft); border-color: var(--accent);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.match-card .t { font-family: var(--font-display); font-size: 16px; font-weight: 500; letter-spacing: -0.01em; line-height: 1.15; }
.match-card .s { color: var(--text-secondary); font-size: 12px; margin-top: 2px; }

.match-targets { display: flex; flex-direction: column; gap: 8px; }
.match-target {
  padding: 12px 14px;
  border: 1px dashed var(--border); border-radius: var(--r-m);
  background: var(--bg-surface);
  cursor: pointer; color: inherit; text-align: left;
  font: inherit; width: 100%; display: block;
  transition: all var(--dur-2) var(--ease-out);
}
.match-target[data-state="active"] { border-color: var(--accent); background: var(--accent-soft); }
.match-target[data-state="filled"] { border-style: solid; border-color: var(--accent); background: var(--bg-surface); }
.match-target .ttl { font-family: var(--font-display); font-size: 16px; font-weight: 500; letter-spacing: -0.01em; }
.match-target .detail { color: var(--text-secondary); font-size: 12px; margin-top: 2px; }
.match-target .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.match-target .chip {
  padding: 4px 8px; border-radius: 999px;
  background: var(--accent); color: var(--text-on-accent);
  font-size: 11px; font-weight: 700;
}
.match-target .chip.is-wrong { background: var(--danger); }

.match-shake { animation: shake 320ms var(--ease-out); }
@keyframes shake {
  0% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
  100% { transform: translateX(0); }
}

/* Reading */
.reading-page { display: flex; flex-direction: column; gap: 16px; }
.reading-eyebrow { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.reading-ref { color: var(--text-tertiary); font-size: 13px; }
.reading-passage {
  font-family: var(--font-display); font-style: italic;
  font-size: 26px; line-height: 1.35; letter-spacing: -0.012em;
  font-weight: 400;
  padding: 22px; border-radius: var(--r-l);
  background: var(--bg-surface); border: 1px solid var(--border-hair);
}
.reading-key {
  padding: 12px 14px; border-radius: var(--r-m);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}
.reading-key .lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.reading-key .ttl { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; margin: 4px 0 2px; }
.reading-key .def { color: var(--text-primary); font-size: 14px; line-height: 1.5; }
.reading-reflection { color: var(--text-secondary); font-size: 14px; line-height: 1.6; }
.reading-reflection .ttl {
  display: block;
  font-family: var(--font-display); font-style: italic;
  font-size: 16px; color: var(--text-primary); margin-bottom: 6px;
  font-weight: 500;
}

.reading-pager { display: flex; gap: 6px; justify-content: center; padding: 8px 0 0; }
.reading-pager span {
  width: 18px; height: 4px; border-radius: 999px; background: var(--bg-inset);
  transition: background var(--dur-2) var(--ease-out), width var(--dur-2) var(--ease-out);
}
.reading-pager span.is-active { background: var(--accent); width: 28px; }

/* ─── Lesson complete ─────────────────────────────────────────────────── */
.complete-wrap {
  display: flex; flex-direction: column; align-items: center; gap: 16px;
  padding: 64px 24px 24px; text-align: center;
}
.complete-glow {
  width: 140px; height: 140px; border-radius: 999px;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 75%);
  display: grid; place-items: center;
}
.complete-medal {
  width: 96px; height: 96px; border-radius: 999px;
  background: var(--accent); color: var(--text-on-accent);
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 36px; font-weight: 500;
  box-shadow: 0 16px 36px var(--accent-glow);
}
.complete-eyebrow { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.complete-title { font-family: var(--font-display); font-size: 36px; font-weight: 400; letter-spacing: -0.022em; line-height: 1.05; }
.complete-title em { font-style: italic; color: var(--accent); font-weight: 300; }
.complete-sub { color: var(--text-secondary); font-size: 14px; max-width: 32ch; line-height: 1.5; }
.complete-stats { display: flex; gap: 10px; margin: 8px 24px 20px; }
.complete-stats .stat { flex: 1; padding: 14px 12px; align-items: stretch; flex-direction: column; gap: 4px; }
.complete-actions { display: flex; flex-direction: column; gap: 10px; padding: 0 20px 24px; }
.btn-primary {
  width: 100%; padding: 14px 18px; border-radius: 999px;
  background: var(--accent); color: var(--text-on-accent);
  border: none; cursor: pointer;
  font-family: var(--font-ui); font-size: 15px; font-weight: 700;
}
.btn-secondary {
  width: 100%; padding: 14px 18px; border-radius: 999px;
  background: transparent; color: var(--text-primary);
  border: 1px solid var(--border); cursor: pointer;
  font-family: var(--font-ui); font-size: 15px; font-weight: 600;
}

/* ─── Onboarding ──────────────────────────────────────────────────────── */
.onb {
  display: flex; flex-direction: column; height: 100%;
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom);
}
.onb-top { padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; }
.onb-dots { display: flex; gap: 6px; }
.onb-dots span { width: 18px; height: 4px; border-radius: 999px; background: var(--bg-inset); transition: all var(--dur-2) var(--ease-out); }
.onb-dots span.is-active { background: var(--accent); width: 28px; }
.onb-skip { background: none; border: none; color: var(--text-tertiary); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; cursor: pointer; }
.onb-body {
  flex: 1; overflow-y: auto;
  padding: 8px 24px 16px;
  display: flex; flex-direction: column; gap: 16px;
}
.onb-eyebrow { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--accent); }
.onb-title {
  font-family: var(--font-display); font-size: 44px;
  font-weight: 400; letter-spacing: -0.026em; line-height: 1.02;
  margin: 4px 0 8px;
}
.onb-title em { font-style: italic; color: var(--accent); font-weight: 300; }
.onb-lede { color: var(--text-secondary); font-size: 15px; line-height: 1.55; }
.onb-input {
  width: 100%; padding: 14px 16px;
  border-radius: var(--r-m); border: 1px solid var(--border);
  background: var(--bg-surface); color: var(--text-primary);
  font-family: inherit; font-size: 16px;
  margin-top: 8px;
}
.onb-input:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

.onb-cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.onb-cat-card {
  position: relative;
  padding: 16px; border-radius: var(--r-l);
  background: var(--bg-surface); border: 1px solid var(--border-hair);
  cursor: pointer; text-align: left;
  font: inherit; color: inherit;
}
.onb-cat-card .swatch {
  width: 28px; height: 28px; border-radius: 9px;
  background: var(--cat-color);
}
.onb-cat-card .name { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; margin-top: 12px; }
.onb-cat-card[aria-pressed="true"] {
  border-color: var(--cat-color);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--cat-color) 24%, transparent);
}
.onb-cat-card[aria-pressed="true"]::after {
  content: '✓'; position: absolute; top: 12px; right: 12px;
  width: 22px; height: 22px; border-radius: 999px;
  background: var(--cat-color); color: #fff;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
}

.onb-goal-row { display: flex; gap: 10px; }
.onb-goal-row .goal {
  flex: 1; padding: 16px 8px;
  border-radius: var(--r-l); border: 1px solid var(--border-hair);
  background: var(--bg-surface); cursor: pointer;
  text-align: center; color: inherit;
  font: inherit;
  transition: all var(--dur-2) var(--ease-out);
}
.onb-goal-row .goal .n { font-family: var(--font-display); font-size: 32px; font-weight: 500; letter-spacing: -0.018em; color: var(--text-primary); }
.onb-goal-row .goal .l { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; color: var(--text-tertiary); margin-top: 4px; }
.onb-goal-row .goal[aria-pressed="true"] {
  border-color: var(--accent); background: var(--accent-soft);
  box-shadow: 0 4px 16px var(--accent-glow);
}
.onb-goal-row .goal[aria-pressed="true"] .n,
.onb-goal-row .goal[aria-pressed="true"] .l { color: var(--accent); }

.onb-foot { padding: 0 20px 24px; display: flex; gap: 10px; }
.onb-foot .btn-primary { flex: 1; }

/* ─── Profile ─────────────────────────────────────────────────────────── */
.profile-hero {
  display: flex; align-items: center; gap: 16px;
  padding: 24px 20px 20px;
}
.profile-av {
  width: 64px; height: 64px; border-radius: 999px;
  background: var(--accent); color: var(--text-on-accent);
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 28px; font-weight: 500;
}
.profile-hero .name { font-family: var(--font-display); font-size: 26px; font-weight: 400; letter-spacing: -0.018em; }
.profile-hero .meta { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; font-weight: 700; color: var(--text-tertiary); margin-top: 4px; }

.profile-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 4px 20px 20px; }
.profile-stats .stat { display: block; padding: 16px; }
.profile-stats .stat .num { font-size: 28px; display: block; }
.profile-stats .stat .lbl { display: block; margin-top: 8px; }

.profile-section {
  margin: 0 20px 20px;
  padding: 16px 18px;
  background: var(--bg-surface);
  border: 1px solid var(--border-hair);
  border-radius: var(--r-l);
}
.profile-section .hd { font-family: var(--font-display); font-size: 18px; font-weight: 500; letter-spacing: -0.01em; margin-bottom: 14px; }
.profile-row { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--border-hair); }
.profile-row:last-child { border-bottom: none; }
.profile-row .lbl { flex: 1; font-size: 14px; color: var(--text-primary); }
.profile-row .seg { display: flex; gap: 4px; padding: 2px; background: var(--bg-inset); border-radius: 999px; }
.profile-row .seg button {
  background: transparent; border: none; cursor: pointer;
  padding: 6px 14px; border-radius: 999px;
  font-family: inherit; font-size: 12px; font-weight: 600;
  color: var(--text-secondary);
}
.profile-row .seg button[aria-pressed="true"] {
  background: var(--bg-surface); color: var(--text-primary);
  box-shadow: var(--shadow-1);
}
.profile-row .swatches { display: flex; gap: 6px; }
.profile-row .sw {
  width: 26px; height: 26px; border-radius: 8px; border: 2px solid transparent;
  cursor: pointer;
}
.profile-row .sw[aria-pressed="true"] {
  border-color: var(--text-primary);
}

.profile-cat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.profile-cat-tile {
  padding: 12px; border-radius: var(--r-m);
  border: 1px solid var(--border-hair);
  background: var(--bg-canvas);
}
.profile-cat-tile .name { font-family: var(--font-display); font-size: 14px; font-weight: 500; }
.profile-cat-tile .num { font-family: var(--font-mono); font-size: 11px; color: var(--text-tertiary); margin-top: 4px; }

.achv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; padding-top: 4px; }
.achv-cell {
  aspect-ratio: 1; border-radius: var(--r-m);
  background: var(--bg-canvas); border: 1px solid var(--border-hair);
  display: grid; place-items: center;
  font-family: var(--font-display); font-size: 16px; font-weight: 600;
  color: var(--text-tertiary);
  position: relative;
}
.achv-cell.unlocked {
  background: var(--accent-soft); color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
}
.achv-cell.unlocked[data-rarity="rare"] { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent) 40%, transparent); }
.achv-cell.unlocked[data-rarity="epic"] { box-shadow: inset 0 0 0 2px var(--accent); }

.danger-btn {
  width: 100%; padding: 12px; border-radius: var(--r-m);
  border: 1px solid color-mix(in srgb, var(--danger) 30%, transparent);
  background: transparent; color: var(--danger);
  cursor: pointer; font-family: inherit; font-size: 13px; font-weight: 600;
}

/* ─── Misc ────────────────────────────────────────────────────────────── */
.spacer { height: 12px; }
.fade-in { animation: fadeIn var(--dur-3) var(--ease-out); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }