:root {
  --bg: #FBF7EF;
  --panel: #FFFFFF;
  --panel-2: #F5EFE3;
  --ink: #1F2233;
  --muted: #6B6F80;
  --line: #E8E1D3;
  --saffron: #F29E38;
  --saffron-ink: #9A5A0C;
  --teal: #1B9C8F;
  --violet: #6C5CE7;
  --done: #2E9E5B;
  --shadow: 0 1px 2px rgba(31,34,51,.06), 0 8px 24px rgba(31,34,51,.07);
  --radius: 18px;
  --nav-w: 288px;
  --buddy-w: 360px;
  --head: "Baloo 2", "Nunito", system-ui, sans-serif;
  --body: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15161E; --panel: #1E2030; --panel-2: #262839; --ink: #EEF0F7; --muted: #A2A6B8;
    --line: #2F3246; --saffron-ink: #F7B866; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
  }
}
:root[data-theme="dark"] {
  --bg: #15161E; --panel: #1E2030; --panel-2: #262839; --ink: #EEF0F7; --muted: #A2A6B8;
  --line: #2F3246; --saffron-ink: #F7B866; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body { background: var(--bg); color: var(--ink); font: 16px/1.55 var(--body); -webkit-font-smoothing: antialiased; }
button { font: inherit; color: inherit; }
h1, h2, h3 { font-family: var(--head); line-height: 1.15; margin: 0; }

.shell { display: grid; grid-template-columns: var(--nav-w) minmax(0, 1fr) var(--buddy-w); height: 100vh; transition: grid-template-columns .25s ease; }
.shell.nav-collapsed { --nav-w: 68px; }

/* ---------- left nav ---------- */
.nav { background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.nav-head { display: flex; gap: 10px; align-items: flex-start; padding: 18px 14px 12px; }
.icon-btn { border: 0; background: var(--panel-2); width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center; cursor: pointer; flex: none; transition: transform .25s; }
.nav-collapsed .icon-btn { transform: rotate(180deg); }
.eyebrow { font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.chapter-name { font-family: var(--head); font-weight: 800; font-size: 22px; }
.nav-collapsed .nav-title, .nav-collapsed .cp-text, .nav-collapsed .nav-foot { display: none; }

.cp-list { list-style: none; margin: 4px 0 0; padding: 0 10px; overflow-y: auto; flex: 1; }
.cp { display: flex; gap: 12px; align-items: center; width: 100%; text-align: left; border: 0; background: none; padding: 10px 8px; border-radius: 14px; cursor: pointer; position: relative; }
.cp:hover:not(:disabled) { background: var(--panel-2); }
.cp:disabled { cursor: not-allowed; opacity: .55; }
.cp.current { background: color-mix(in srgb, var(--saffron) 16%, transparent); }
.cp-badge { flex: none; width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; font-family: var(--head); font-weight: 800; font-size: 15px; background: var(--panel-2); border: 2px solid var(--line); }
.cp.current .cp-badge { border-color: var(--saffron); background: var(--panel); color: var(--saffron-ink); }
.cp.done .cp-badge { background: var(--done); border-color: var(--done); color: #fff; }
.cp-text { min-width: 0; }
.cp-title { font-weight: 700; line-height: 1.25; }
.cp-meta { font-size: 13px; color: var(--muted); display: flex; gap: 8px; align-items: center; margin-top: 3px; }
.pips { display: inline-flex; gap: 4px; }
.pip { width: 18px; height: 5px; border-radius: 3px; background: var(--line); }
.pip.on { background: var(--saffron); }
.cp.done .pip { background: var(--done); }
.lock { font-size: 12px; }

.nav-foot { padding: 14px 16px 18px; border-top: 1px solid var(--line); display: grid; gap: 10px; }
.overall { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); font-weight: 700; }
.overall-bar { flex: 1; height: 8px; border-radius: 4px; background: var(--panel-2); overflow: hidden; }
.overall-bar i { display: block; height: 100%; width: 0; background: var(--done); transition: width .4s; }
.link-btn { border: 0; background: none; color: var(--muted); text-decoration: underline; cursor: pointer; justify-self: start; padding: 0; font-size: 13px; }

/* ---------- centre stage ---------- */
.stage { overflow-y: auto; padding: 28px clamp(16px, 4vw, 56px) 40px; min-width: 0; }
.stage-inner { max-width: 820px; margin: 0 auto; }
.step-tabs { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.step-tab { font-size: 13px; font-weight: 700; padding: 5px 12px; border-radius: 999px; background: var(--panel-2); color: var(--muted); }
.step-tab.on { background: var(--ink); color: var(--bg); }
.step-tab.done { background: color-mix(in srgb, var(--done) 18%, transparent); color: var(--done); }
.sec-label { color: var(--saffron-ink); font-weight: 800; font-family: var(--head); font-size: 15px; letter-spacing: .02em; }
.sec-title { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; margin: 2px 0 18px; }

.card { background: var(--panel); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.slide-media { aspect-ratio: 16 / 9; background: var(--panel-2); display: grid; place-items: center; overflow: hidden; }
.slide-media img { width: 100%; height: 100%; object-fit: cover; }
.slide-media.contain img { object-fit: contain; background: #fff; }
.slide-media svg { width: 100%; height: 100%; }
.slide-body { padding: 22px 26px 24px; }
.slide-body h3 { font-size: 26px; font-weight: 800; margin-bottom: 8px; }
.slide-body p { font-size: 18px; margin: 0; }
.credit { font-size: 12px; color: var(--muted); margin-top: 14px; }
.slide-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 18px; }
.dots { display: flex; gap: 6px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); border: 0; padding: 0; cursor: pointer; }
.dot.on { background: var(--saffron); width: 24px; border-radius: 5px; }

.btn { border: 0; border-radius: 14px; padding: 12px 20px; font-weight: 800; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-size: 16px; transition: transform .1s, filter .15s; }
.btn:active { transform: scale(.97); }
a.btn { text-decoration: none; color: var(--ink); }
a.btn.primary { color: #231404; }
a.btn.teal { color: #fff; }
.btn.primary { background: var(--saffron); color: #231404; }
.btn.primary:hover { filter: brightness(1.05); }
.btn.teal { background: var(--teal); color: #fff; }
.btn.ghost { background: var(--panel-2); }
.btn.small { padding: 8px 14px; font-size: 14px; }
.btn.big { padding: 16px 26px; font-size: 18px; border-radius: 18px; }
.btn:disabled { opacity: .5; cursor: default; }

/* read step */
.read-card { padding: 30px; display: grid; gap: 20px; }
.book-row { display: flex; gap: 22px; align-items: center; }
.book-icon { flex: none; width: 92px; height: 116px; border-radius: 6px 14px 14px 6px; background: linear-gradient(135deg, var(--teal), #137167); color: #fff; display: grid; place-items: center; text-align: center; font-family: var(--head); font-weight: 800; line-height: 1.05; font-size: 15px; box-shadow: inset 6px 0 0 rgba(0,0,0,.18), var(--shadow); padding: 8px; }
.pages-big { font-family: var(--head); font-weight: 800; font-size: clamp(30px, 4vw, 44px); line-height: 1.05; }
.think { background: color-mix(in srgb, var(--violet) 10%, var(--panel)); border-radius: 14px; padding: 16px 18px; border-left: 5px solid var(--violet); font-size: 17px; }
.think b { display: block; font-family: var(--head); color: var(--violet); margin-bottom: 2px; }
.timer { font-variant-numeric: tabular-nums; color: var(--muted); font-weight: 700; }
.read-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; }
.pdf-link { color: var(--muted); font-size: 14px; }

/* talk step */
.talk-card { padding: 26px 28px; }
.talk-card h3 { font-size: 22px; font-weight: 800; }
.talk-card .hint { color: var(--muted); margin: 4px 0 18px; }
.ideas { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.idea { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border-radius: 14px; background: var(--panel-2); transition: background .4s; }
.idea .star { flex: none; font-size: 22px; line-height: 1; filter: grayscale(1) opacity(.35); transition: filter .4s, transform .4s; }
.idea .txt { color: var(--muted); font-style: italic; }
.idea.got { background: color-mix(in srgb, var(--done) 13%, var(--panel)); }
.idea.got .star { filter: none; transform: scale(1.15); }
.idea.got .txt { color: var(--ink); font-style: normal; }
.idea.pop { animation: pop .6s ease; }
@keyframes pop { 30% { transform: scale(1.03); } }
.try { margin-top: 18px; padding: 16px 18px; border-radius: 14px; border: 2px dashed var(--line); }
.try b { font-family: var(--head); color: var(--saffron-ink); }

.done-card { padding: 30px; text-align: center; display: grid; gap: 14px; justify-items: center; }
.done-card .big-emoji { font-size: 56px; }
.parent-note { text-align: left; width: 100%; background: var(--panel-2); border-radius: 14px; padding: 14px 18px; }
.parent-note summary { cursor: pointer; font-weight: 800; }
.parent-note ul { margin: 8px 0 0; padding-left: 20px; }

/* ---------- right buddy ---------- */
.buddy { background: var(--panel); border-left: 1px solid var(--line); display: flex; flex-direction: column; align-items: center; padding: 22px 20px; gap: 12px; min-height: 0; }
.buddy-head { text-align: center; }
.buddy-name { font-family: var(--head); font-weight: 800; font-size: 24px; line-height: 1; }
.buddy-sub { color: var(--muted); font-size: 13px; }
.orb-wrap { border: 0; background: none; padding: 0; width: min(280px, 100%); aspect-ratio: 1; cursor: pointer; border-radius: 50%; }
.orb-wrap canvas { width: 100%; height: 100%; display: block; }
.buddy-status { font-weight: 700; text-align: center; min-height: 1.5em; color: var(--muted); }
.captions { flex: 1; width: 100%; overflow-y: auto; display: flex; flex-direction: column; gap: 8px; padding: 4px 2px; min-height: 60px; mask-image: linear-gradient(to bottom, transparent, #000 24px); }
.cap { padding: 9px 13px; border-radius: 14px; font-size: 15px; max-width: 92%; }
.cap.ai { background: var(--panel-2); align-self: flex-start; border-bottom-left-radius: 4px; }
.cap.kid { background: color-mix(in srgb, var(--teal) 16%, var(--panel)); align-self: flex-end; border-bottom-right-radius: 4px; }
.cap.sys { align-self: center; font-size: 12px; color: var(--muted); background: none; padding: 2px 8px; }
.cap.err { background: #fde8e4; color: #8a2a17; align-self: stretch; }
.buddy-controls { width: 100%; display: grid; gap: 10px; justify-items: center; }
.buddy-controls .btn { width: 100%; }
.mic-settings { display: grid; gap: 8px; justify-items: center; width: 100%; }
.seg { display: inline-flex; background: var(--panel-2); border-radius: 12px; padding: 3px; }
.seg button { border: 0; background: none; padding: 6px 12px; border-radius: 9px; font-size: 13px; font-weight: 700; color: var(--muted); cursor: pointer; }
.seg button.on { background: var(--panel); color: var(--ink); box-shadow: var(--shadow); }
.toggle select { max-width: 200px; }
.toggle select { font: inherit; font-size: 13px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--ink); padding: 3px 6px; }
.orb-wrap.holding { transform: scale(.96); }
.orb-wrap { transition: transform .12s; touch-action: none; user-select: none; }
.toggle { font-size: 13px; color: var(--muted); display: flex; gap: 8px; align-items: center; cursor: pointer; }

dialog { border: 0; border-radius: 22px; padding: 0; box-shadow: var(--shadow); background: var(--panel); color: var(--ink); }
dialog::backdrop { background: rgba(20,20,30,.45); }
.name-form { padding: 30px; display: grid; gap: 12px; width: min(420px, 90vw); text-align: center; }
.dlg-emoji { font-size: 44px; }
.name-form input { font: inherit; font-size: 18px; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--line); background: var(--bg); color: var(--ink); text-align: center; }

/* ---------- narrow screens: nav becomes a top strip, buddy goes below ---------- */
@media (max-width: 1000px) {
  .shell { grid-template-columns: var(--nav-w) minmax(0, 1fr); grid-template-rows: 1fr auto; height: auto; min-height: 100vh; }
  .buddy { grid-column: 1 / -1; border-left: 0; border-top: 1px solid var(--line); }
  .orb-wrap { width: 180px; }
  .captions { max-height: 220px; }
}
@media (max-width: 700px) {
  .shell, .shell.nav-collapsed { grid-template-columns: 1fr; }
  .nav { border-right: 0; border-bottom: 1px solid var(--line); max-height: 60vh; }
  .shell.nav-collapsed .nav { max-height: 70px; }
  .stage { padding: 20px 16px 28px; }
  .book-row { flex-direction: column; align-items: flex-start; }
}

/* chapter page additions */
.back-link { display: inline-block; font-size: 13px; font-weight: 700; color: var(--muted); text-decoration: none; margin-bottom: 4px; }
.back-link:hover { color: var(--ink); }
.narr-row { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.slide-media.kenburns img { animation: kenburns 22s ease-out both; transform-origin: 60% 40%; }
@keyframes kenburns { from { transform: scale(1); } to { transform: scale(1.12); } }
@media (prefers-reduced-motion: reduce) { .slide-media.kenburns img { animation: none; } }
.slide-media.missing { background: repeating-linear-gradient(45deg, var(--panel-2), var(--panel-2) 14px, var(--bg) 14px, var(--bg) 28px); }
.slide-media.missing::after { content: "Picture coming soon"; color: var(--muted); font-weight: 700; }