/* =============================================
   p-book v3: Mobile-first adaptive UX
   ============================================= */
:root {
  --bg: #F8F8F5;
  --surface: #FFFFFF;
  --surface-raised: #FFFFFF;
  --text: #1C1917;
  --text-2: #57534E;
  --text-3: #A8A29E;
  --border: #E7E5E4;
  --border-light: #F5F5F4;
  --accent: #7C3AED;
  --accent-hover: #6D28D9;
  --accent-bg: #EDE9FE;
  --engineer: #2563EB;
  --engineer-bg: #EFF6FF;
  --product: #059669;
  --product-bg: #ECFDF5;
  --business: #D97706;
  --business-bg: #FFFBEB;
  --sidebar-color: #7C3AED;
  --sidebar-bg: #F5F3FF;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-ui: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', Consolas, monospace;
  --content-w: 680px;
  --topbar-h: 52px;
  --bottomnav-h: 56px;
  --fs: 1.1rem;
  --lh: 1.8;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}
[data-theme="dark"] {
  --bg: #171412; --surface: #231F1C; --surface-raised: #2C2724;
  --text: #F5F5F4; --text-2: #A8A29E; --text-3: #78716C;
  --border: #3D3632; --border-light: #2C2724;
  --engineer-bg: #1A2744; --product-bg: #0A3D2E; --business-bg: #3D2600; --sidebar-bg: #261450;
  --shadow: 0 1px 3px rgba(0,0,0,0.3); --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
}
[data-theme="sepia"] {
  --bg: #F5EFE4; --surface: #FAF5EC; --surface-raised: #FFF9F0;
  --text: #3D2E1C; --text-2: #8B7355; --border: #D4C8B0;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: var(--lh); overflow-x: hidden; }
button { font-family: var(--font-ui); cursor: pointer; border: none; background: none; color: inherit; }

/* Buttons */
.btn-primary { background: var(--accent); color: #fff; font-weight: 600; padding: .7em 2em; border-radius: var(--radius-sm); font-size: 1rem; transition: background var(--transition); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-large { padding: .9em 2.5em; font-size: 1.1rem; border-radius: var(--radius); }
.btn-ghost { color: var(--text-2); font-size: .9rem; padding: .5em 1em; }
.btn-ghost:hover { color: var(--accent); }

/* =============================================
   ONBOARDING
   ============================================= */
.overlay { position: fixed; inset: 0; background: var(--bg); z-index: 900; display: flex; align-items: flex-start; justify-content: center; overflow-y: auto; scrollbar-width: none; padding: 2em 1em; transition: opacity .4s; }
.overlay::-webkit-scrollbar { display: none; }
.overlay.hidden { opacity: 0; pointer-events: none; }
.onboarding-card { max-width: 480px; width: 90%; text-align: center; }
.onboarding-card h1 { font-family: var(--font-ui); font-size: 2rem; font-weight: 800; letter-spacing: -.03em; margin-bottom: .15em; }
.onboarding-card h2 { font-family: var(--font-ui); font-size: 1.3rem; font-weight: 600; margin-bottom: 1.2em; }
.onboarding-card .author { font-family: var(--font-ui); font-size: .8rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .06em; margin-bottom: 1.5em; }
.onboarding-card .subtitle { font-size: 1.05rem; color: var(--text-2); margin-bottom: 2em; }
.step { display: none; } .step.active { display: block; animation: fadeUp .3s ease; }

/* Intro layout */
.intro-subtitle { font-size: .92rem; color: var(--text-2); margin-bottom: 1.2em; }
.intro-features { display: grid; grid-template-columns: 1fr; gap: .35em; margin-bottom: 1.2em; text-align: left; }
.intro-feature { display: flex; gap: .5em; align-items: flex-start; font-size: .78rem; line-height: 1.4; padding: .45em .6em; background: var(--surface-raised); border-radius: var(--radius-sm); }
.intro-feature span:first-child { font-size: 1.1rem; flex-shrink: 0; }

/* Collapsible details sections */
.intro-details { text-align: left; margin-top: .6em; }
.intro-details summary { font-family: var(--font-ui); font-size: .78rem; font-weight: 600; color: var(--accent); cursor: pointer; padding: .4em .7em; list-style: none; border: 1px solid var(--border); border-radius: var(--radius-sm); transition: all .15s; text-align: center; }
.intro-details summary:hover { border-color: var(--accent); background: var(--accent-bg); }
.intro-details summary::-webkit-details-marker { display: none; }
.intro-details summary::after { content: ' \25BE'; font-size: .7rem; }
.intro-details[open] summary { border-color: var(--accent); background: var(--accent-bg); }
.intro-details[open] summary::after { content: ' \25B4'; }
.intro-details[open] { animation: fadeUp .2s ease; }

.intro-testimonials { display: flex; flex-direction: column; gap: .4em; margin-top: .4em; }
.intro-testimonial { padding: .5em .7em; background: var(--surface-raised); border-radius: var(--radius-sm); border: 1px solid var(--border-light); }
.intro-testimonial p { font-size: .78rem; line-height: 1.4; color: var(--text); font-style: italic; margin-bottom: .15em; }
.testimonial-author { font-family: var(--font-ui); font-size: .65rem; color: var(--text-3); font-style: normal; }

.intro-author-bio { margin-top: .4em; font-size: .8rem; line-height: 1.5; color: var(--text-2); text-align: left; }
.intro-author-bio p { margin-bottom: .5em; }
.intro-author-bio em { color: var(--text); }
.intro-section-title { font-family: var(--font-ui); font-size: .8rem; font-weight: 700; color: var(--text-2); margin: .8em 0 .4em; text-align: left; }

/* Title & tagline */
.intro-title { font-size: 1.8rem; letter-spacing: -.03em; margin-bottom: .2em; }
.intro-tagline { font-family: var(--font-ui); font-size: .88rem; font-weight: 400; color: var(--accent); margin-bottom: .6em; }

/* Hero image */
.intro-hero { width: 100%; max-width: 380px; margin: .3em auto .8em; display: block; border-radius: var(--radius); }

/* Author visible */
.intro-author-visible { text-align: center; margin-bottom: .8em; }
.intro-author-name { font-size: 1.1rem; font-weight: 800; margin-bottom: .1em; }
.intro-author-name a { color: var(--text); text-decoration: none; }
.intro-author-name a:hover { color: var(--accent); }
.intro-author-role { font-family: var(--font-ui); font-size: .72rem; color: var(--text-3); margin-bottom: .4em; }
.intro-author-role a { color: var(--text-2); }
.intro-author-text { font-size: .72rem; color: var(--text-3); line-height: 1.45; }

/* Inline voice selector */
.intro-voices { display: flex; gap: .4em; margin-bottom: .8em; }
.intro-voice { flex: 1; display: flex; align-items: center; justify-content: center; gap: .25em; padding: .45em .3em; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: .72rem; font-weight: 600; background: var(--surface); cursor: pointer; transition: all .15s; }
.intro-voice:hover { border-color: var(--accent); }
.intro-voice.selected { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); }
.intro-voice span:first-child { font-size: .9rem; }

/* Feature toggles */
.intro-toggles { display: flex; flex-direction: column; gap: .4em; padding: .4em 0; }
.intro-toggle { display: flex; align-items: flex-start; gap: .5em; font-size: .76rem; line-height: 1.35; cursor: pointer; }
.intro-toggle input { margin-top: .15em; flex-shrink: 0; }
.toggle-desc { color: var(--text-3); font-size: .68rem; }
.toggle-desc a { color: var(--accent); }
.toggle-hint { font-weight: 400; color: var(--text-3); font-size: .68rem; }

/* Credits */
.intro-credits { margin-top: .8em; text-align: center; font-family: var(--font-ui); font-size: .65rem; color: var(--text-3); line-height: 1.6; }
.intro-credits a { color: var(--text-2); }
.intro-credits p { margin-bottom: .15em; }
.onboard-opts { display: grid; grid-template-columns: 1fr 1fr; gap: .6em; margin: 0 auto; max-width: 360px; }
.opt-card { display: flex; flex-direction: column; align-items: center; gap: .4em; padding: 1.2em .8em; border: 1.5px solid var(--border); border-radius: var(--radius); background: var(--surface); transition: all var(--transition); }
.opt-card:hover, .opt-card.selected { border-color: var(--accent); background: var(--accent-bg); }
.opt-icon { font-size: 1.6rem; }
.opt-label { font-size: .82rem; color: var(--text-2); line-height: 1.3; }

/* =============================================
   TOPBAR
   ============================================= */
.topbar { position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h); background: var(--bg); border-bottom: 1px solid var(--border); display: flex; align-items: center; padding: 0 .8em; z-index: 200; gap: .6em; backdrop-filter: blur(10px); background: rgba(248,248,245,.9); }
[data-theme="dark"] .topbar { background: rgba(23,20,18,.9); }
.topbar-left { flex-shrink: 0; }
.topbar-title { font-family: var(--font-ui); font-size: .85rem; font-weight: 700; color: var(--accent); cursor: pointer; }
.topbar-search { flex: 1; display: flex; align-items: center; gap: .4em; padding: .4em .8em; background: var(--border-light); border-radius: 20px; color: var(--text-3); font-size: .85rem; transition: background var(--transition); }
.topbar-search:hover { background: var(--border); }
.search-placeholder { font-family: var(--font-ui); }
.topbar-right { display: flex; align-items: center; gap: .4em; flex-shrink: 0; }
.topbar-icon { font-size: 1.1rem; padding: .3em; color: var(--text-2); border-radius: 6px; }
.topbar-icon:hover { background: var(--border-light); }
/* XP badge in topbar */
.xp-badge { font-family: var(--font-ui); font-size: .65rem; font-weight: 800; padding: .2em .6em; border-radius: 12px; background: linear-gradient(135deg, var(--accent), #EC4899); color: #fff; cursor: pointer; transition: transform var(--transition); }
.xp-badge:hover { transform: scale(1.1); }

/* XP toast notification */
.xp-toast { position: fixed; top: calc(var(--topbar-h) + .5em); right: .8em; font-family: var(--font-ui); font-size: .8rem; font-weight: 700; padding: .4em .8em; border-radius: 10px; color: #fff; z-index: 500; opacity: 0; transform: translateY(-10px); transition: all .3s ease; pointer-events: none; }
.xp-toast.show { opacity: 1; transform: translateY(0); }
.xp-toast.xp { background: linear-gradient(135deg, var(--accent), #EC4899); }
.xp-toast.achievement { background: linear-gradient(135deg, #F59E0B, #EF4444); font-size: .85rem; padding: .5em 1em; }
.xp-toast.levelup { background: linear-gradient(135deg, #10B981, #3B82F6); font-size: .9rem; padding: .6em 1em; }
.xp-toast.info { background: linear-gradient(135deg, #6B7280, #4B5563); }

/* Certificate */
.cert-btn { background: linear-gradient(135deg, var(--accent), #EC4899); color: #fff; border: none; border-radius: 8px; padding: .6em 1.2em; font-size: .85rem; font-weight: 700; cursor: pointer; font-family: var(--font-ui); }
.cert-btn:hover { opacity: .9; transform: translateY(-1px); }
.cert-locked { opacity: .8; }
.cert-progress { height: 6px; background: var(--border); border-radius: 3px; margin-top: .5em; overflow: hidden; }
.cert-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #EC4899); border-radius: 3px; transition: width .5s; }

.voice-badge { font-family: var(--font-ui); font-size: .65rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; padding: .2em .5em; border-radius: 4px; color: #fff; }
.voice-badge.engineer, .voice-badge.explorer { background: var(--engineer); }
.voice-badge.product, .voice-badge.creator { background: var(--product); }
.voice-badge.business, .voice-badge.thinker { background: var(--business); }
.voice-badge.universal { background: var(--text-3); }
.voice-badge:empty { display: none; }

/* =============================================
   SEARCH OVERLAY
   ============================================= */
.search-overlay { position: fixed; inset: 0; background: var(--bg); z-index: 300; display: none; flex-direction: column; }
.search-overlay.open { display: flex; }
.search-header { display: flex; align-items: center; gap: .5em; padding: .6em .8em; border-bottom: 1px solid var(--border); }
.search-input-wrap { flex: 1; display: flex; align-items: center; gap: .4em; padding: .4em .6em; background: var(--border-light); border-radius: 10px; }
.search-input-wrap input { flex: 1; border: none; background: none; font-family: var(--font-ui); font-size: 1rem; color: var(--text); outline: none; }
.search-icon { font-size: 1rem; color: var(--text-3); }
.search-results { flex: 1; overflow-y: auto; padding: .5em; }
.search-empty { text-align: center; padding: 3em 1em; color: var(--text-3); font-family: var(--font-ui); font-size: .9rem; }

/* =============================================
   BOTTOM NAV
   ============================================= */
.bottom-nav { position: fixed; bottom: 0; left: 0; right: 0; height: var(--bottomnav-h); background: var(--surface); border-top: 1px solid var(--border); display: flex; z-index: 200; padding-bottom: env(safe-area-inset-bottom); }
.tab { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: .15em; color: var(--text-3); transition: color var(--transition); }
.tab.active { color: var(--accent); }
.tab-icon { font-size: 1.2rem; }
.tab-label { font-family: var(--font-ui); font-size: .65rem; font-weight: 600; }

/* =============================================
   VIEWS
   ============================================= */
#appMain { padding-top: var(--topbar-h); padding-bottom: calc(var(--bottomnav-h) + 42px); min-height: 100vh; }
.view { display: none; }
.view.active { display: block; }

/* =============================================
   HOME VIEW
   ============================================= */
/* Hero */
.home-hero { text-align: center; padding: 1.5em 1em 0; }
.home-title { font-family: var(--font-ui); font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; margin-bottom: .1em; }
.home-author { font-family: var(--font-ui); font-size: .75rem; color: var(--text-3); margin-bottom: .3em; }
.home-slogan { font-size: .85rem; color: var(--text-2); margin-bottom: .6em; }
.home-progress-mini { font-family: var(--font-ui); font-size: .7rem; color: var(--accent); font-weight: 600; margin-bottom: .3em; }

/* Reading modes grid */
.home-modes { display: grid; grid-template-columns: 1fr 1fr; gap: .5em; padding: .5em 1em 1em; max-width: 400px; margin: 0 auto; }
.home-mode { display: flex; flex-direction: column; align-items: center; gap: .2em; padding: .7em .5em; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: all var(--transition); }
.home-mode:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.home-mode-icon { font-size: 1.3rem; }
.home-mode-label { font-family: var(--font-ui); font-size: .78rem; font-weight: 700; }
.home-mode-desc { font-family: var(--font-ui); font-size: .62rem; color: var(--text-3); }

/* Mission progress in topbar */
.mission-bar-inline { display: flex; align-items: center; gap: 4px; margin: 0 .3em; }
.mission-bar-back { background: none; border: none; font-size: 1rem; cursor: pointer; padding: 0 2px; line-height: 1; }
.mission-bar-back:hover { transform: scale(1.15); }
.mission-bar-dots { display: flex; gap: 3px; align-items: center; }
.mission-bar-inline .mission-dot { width: 7px; height: 7px; }
.mission-bar-inline .mission-dot.done { background: var(--product); }
.mission-bar-inline .mission-dot.current { background: var(--accent); box-shadow: 0 0 0 2px var(--accent-bg); }

/* Shelves */
.home-inner { padding: 1em 0; }
.shelf { margin-bottom: 1.8em; }
.shelf-head { padding: 0 1em; margin-bottom: .4em; }
.shelf-title { font-family: var(--font-ui); font-size: 1rem; font-weight: 700; }
.shelf-wrap { position: relative; }
.shelf-scroll { display: flex; gap: .6em; overflow-x: auto; padding: 0 1em .5em; scroll-snap-type: x proximity; scroll-padding-inline-start: 1em; -webkit-overflow-scrolling: touch; scrollbar-width: none; scroll-behavior: smooth; }
.shelf-scroll::-webkit-scrollbar { display: none; }
.shelf-btn { position: absolute; top: 0; bottom: .5em; width: 2.8em; z-index: 5; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: 300; color: var(--text); transition: opacity var(--transition); opacity: 0; }
.shelf-wrap:hover .shelf-btn:not(.arrow-hidden) { opacity: 1; }
.shelf-btn-left { left: 0; background: linear-gradient(to right, var(--bg) 50%, transparent); border-radius: var(--radius) 0 0 var(--radius); }
.shelf-btn-right { right: 0; background: linear-gradient(to left, var(--bg) 50%, transparent); border-radius: 0 var(--radius) var(--radius) 0; }
.shelf-btn:hover { color: var(--accent); }
.shelf-btn.arrow-hidden { opacity: 0 !important; pointer-events: none !important; }
.shelf-wrap.no-scroll .shelf-btn { display: none; }
.shelf-wrap.no-scroll .shelf-scroll { padding: 0 1em .5em; }
@media (max-width: 600px) { .shelf-btn:not(.arrow-hidden) { opacity: .5; width: 2em; font-size: 1.5rem; } .shelf-scroll { padding: 0 1em .5em; } }

/* Content cards */
.card { flex: 0 0 260px; scroll-snap-align: start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1em; display: flex; flex-direction: column; gap: .5em; transition: all var(--transition); cursor: pointer; min-height: 140px; }
.card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-2px); }
.card-chapter { font-family: var(--font-ui); font-size: .65rem; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .04em; }
.card-title { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; line-height: 1.25; flex: 1; }
.card-meta { display: flex; align-items: center; gap: .5em; }
.card-time { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); }
.card-badge { font-family: var(--font-ui); font-size: .6rem; font-weight: 700; text-transform: uppercase; padding: .15em .4em; border-radius: 3px; color: #fff; }
.card-badge.engineer, .card-badge.explorer { background: var(--engineer); }
.card-badge.product, .card-badge.creator { background: var(--product); }
.card-badge.business, .card-badge.thinker { background: var(--business); }
.card-badge.spine { background: var(--text-3); }
.card-badge.sidebar { background: var(--sidebar-color); }
.card-teaser { font-size: .8rem; color: var(--text-2); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-read { position: relative; opacity: .55; border-color: var(--border-light); }
.card-read::after { content: '✓ Read'; position: absolute; top: 6px; right: 8px; font-size: .6rem; font-family: var(--font-ui); font-weight: 700; color: #fff; background: var(--product); padding: .15em .4em; border-radius: 4px; }
.card-read:hover { opacity: .8; }
.card-read .card-title { text-decoration: line-through; text-decoration-color: var(--border); }

/* Card content tags (diagram, math, table, code indicators) */
.card-tags { display: flex; gap: .3em; flex-wrap: wrap; margin-bottom: .3em; }
.card-tag { font-family: var(--font-ui); font-size: .6rem; font-weight: 600; padding: .15em .4em; border-radius: 4px; }
.tag-diagram { background: #DBEAFE; color: #1E40AF; }
.tag-math { background: #FCE7F3; color: #9D174D; }
.tag-table { background: #D1FAE5; color: #065F46; }
.tag-code { background: #E5E7EB; color: #374151; }

/* Recall cards (spaced repetition) */
.recall-card { cursor: default; }
.recall-card .card-title { font-size: .85rem; line-height: 1.4; }
.recall-answer-text { font-size: .8rem; color: var(--text-2); line-height: 1.5; padding: .5em 0; border-top: 1px solid var(--border-light); margin-top: .4em; }
.recall-hint { font-size: .65rem; }
.recall-reveal { background: #F59E0B; color: #fff; border: none; border-radius: 6px; padding: .4em .8em; font-size: .75rem; font-weight: 600; cursor: pointer; width: 100%; margin-top: .4em; }
.recall-reveal:hover { background: #D97706; }
.recall-buttons { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: .3em; margin-top: .4em; }
.recall-btn { border: none; border-radius: 5px; padding: .35em .3em; font-size: .65rem; font-weight: 600; cursor: pointer; }
.recall-forgot { background: #FEE2E2; color: #991B1B; }
.recall-hard { background: #FEF3C7; color: #92400E; }
.recall-good { background: #D1FAE5; color: #065F46; }
.recall-easy { background: #DBEAFE; color: #1E40AF; }
.recall-btn:hover { opacity: .85; transform: translateY(-1px); }

/* Full-page recall session */
.recall-session { max-width: 480px; margin: 0 auto; padding: 1em; text-align: center; }
.recall-session h2 { font-size: 1.2rem; margin-bottom: .5em; }
.recall-summary-icon { font-size: 2.5rem; margin: .3em 0; }
.recall-summary-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; margin: .5em auto; max-width: 200px; }
.recall-progress-row { display: flex; align-items: center; gap: .5em; margin-bottom: 1em; }
.recall-progress-label { font-family: var(--font-ui); font-size: .75rem; font-weight: 600; color: var(--text-3); white-space: nowrap; }
.recall-progress-bar { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.recall-due-badge { font-family: var(--font-ui); font-size: .6rem; font-weight: 700; color: #fff; background: #F59E0B; padding: .15em .4em; border-radius: 4px; }
.recall-practice-badge { font-family: var(--font-ui); font-size: .6rem; font-weight: 700; color: var(--accent); background: var(--accent-bg); padding: .15em .4em; border-radius: 4px; }
.recall-card-big { padding: 1.5em; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); }
.recall-card-q { font-size: 1rem; font-weight: 600; line-height: 1.5; margin-bottom: .8em; }
.recall-card-answer { font-size: .88rem; color: var(--text-2); line-height: 1.5; margin-bottom: .5em; padding-top: .5em; border-top: 1px solid var(--border-light); }
.recall-card-source { font-size: .7rem; color: var(--text-3); margin-bottom: .6em; }
.recall-reveal-big { width: 100%; background: #F59E0B; color: #fff; border: none; border-radius: 8px; padding: .6em; font-family: var(--font-ui); font-size: .9rem; font-weight: 700; cursor: pointer; }
.recall-reveal-big:hover { opacity: .9; }

/* Hero card (continue reading) */
.card-hero { flex: 0 0 calc(100% - 2em); max-width: 500px; background: linear-gradient(135deg, var(--accent-bg), var(--surface)); border-color: var(--accent); min-height: 160px; }
.card-hero .card-title { font-size: 1.05rem; }

/* =============================================
   READ VIEW
   ============================================= */
.read-layout { max-width: 1100px; margin: 0 auto; }
.read-pane { max-width: var(--content-w); margin: 0 auto; padding: 1.5em 1em 3em; }

/* Chapter header */
.ch-head { margin-bottom: 2em; padding-bottom: 1.5em; border-bottom: 1px solid var(--border); }
.ch-label { font-family: var(--font-ui); font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--accent); margin-bottom: .3em; }
.ch-head h2 { font-family: var(--font-ui); font-size: 1.7rem; font-weight: 800; letter-spacing: -.02em; line-height: 1.2; margin-bottom: .3em; }
.ch-sub { font-size: 1rem; color: var(--text-2); }

/* Block articles (each block is a distinct card) */
.block-article { margin-bottom: 1.5em; padding: 1.5em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); position: relative; }

.block-header { margin-bottom: 1em; }
.block-header h3 { font-family: var(--font-ui); font-size: 1.35rem; font-weight: 800; line-height: 1.25; margin-bottom: .4em; color: var(--text); }
.block-meta { font-family: var(--font-ui); font-size: .72rem; color: var(--text-3); display: flex; gap: .8em; align-items: center; }
.meta-standalone { background: var(--accent-bg); color: var(--accent); padding: .1em .4em; border-radius: 3px; font-weight: 600; }

.block-status { position: absolute; top: 0; left: 0; width: 3px; height: 100%; border-radius: var(--radius) 0 0 var(--radius); background: var(--border); transition: background .3s; }
.block-status.seen { background: #fbbf24; }
.block-status.read { background: var(--product); }
.block-article:has(.block-status.read) { background: var(--border-light); border-color: var(--border-light); }
.block-article:has(.block-status.read) .block-header h3::after { content: ' ✓'; color: var(--product); font-size: .7em; }

/* Spine body */
.spine-body { font-size: var(--fs); line-height: var(--lh); }
.spine-body p { margin-bottom: 1em; }
.spine-body h2 { font-size: 1.1rem; font-weight: 700; margin: 1.5em 0 .5em; color: var(--text); }
.spine-body h3 { font-size: .95rem; font-weight: 700; margin: 1.2em 0 .4em; color: var(--text-2); }
.spine-body h4 { font-size: .88rem; font-weight: 600; margin: 1em 0 .3em; color: var(--text-2); }
.spine-body ul, .spine-body ol { margin-bottom: 1em; padding-left: 1.6em; }
.spine-body ul { list-style-type: disc; }
.spine-body ol { list-style-type: decimal; }
.spine-body li { margin-bottom: .4em; padding-left: .2em; }
.spine-body li::marker { color: var(--accent); }
.spine-body strong { font-weight: 700; color: var(--text); }
.spine-body em { font-style: italic; }
.spine-body code { font-family: var(--font-mono); font-size: .87em; background: rgba(0,0,0,.05); padding: .15em .35em; border-radius: 4px; }
.spine-body img { max-width: 100%; border-radius: var(--radius-sm); margin: 1em 0; }
.spine-body a { color: var(--accent); text-decoration: underline; }
.spine-body hr { border: none; border-top: 2px solid var(--border); margin: 1.5em 0; }
/* Same for depth and sidebar content */

/* Block footer with reactions and actions */
.block-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 1.2em; padding-top: .8em; border-top: 1px solid var(--border); }
.block-reactions { display: flex; gap: .3em; }
.like-btn { display: flex; align-items: center; gap: .3em; padding: .35em .8em; border-radius: 20px; border: 1.5px solid var(--border); font-size: .82rem; font-family: var(--font-ui); color: var(--text-3); transition: all var(--transition); }
.like-btn span { font-size: .72rem; }
.like-btn:hover { border-color: #ef4444; color: #ef4444; background: #fef2f2; }
.like-btn.liked { border-color: #ef4444; color: #ef4444; background: #fef2f2; font-weight: 600; }

.block-actions { display: flex; gap: .2em; }
.act-btn { padding: .3em .5em; border-radius: 6px; font-size: .9rem; color: var(--text-3); transition: all var(--transition); }
.act-btn:hover { background: var(--border-light); color: var(--text); }
.act-btn.active { color: var(--accent); }
.flag-btn:hover { color: #dc2626; }

/* Notes */
.block-note-display { display: flex; align-items: flex-start; gap: .5em; margin-top: .8em; padding: .6em .8em; background: #FFFBEB; border: 1px solid #FDE68A; border-radius: var(--radius-sm); font-size: .82rem; line-height: 1.4; }
.note-icon { font-size: .9rem; flex-shrink: 0; }
.note-edit { font-size: .7rem; color: var(--accent); margin-left: auto; flex-shrink: 0; }
.note-editor { margin-top: .5em; padding: .8em; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); animation: fadeUp .2s ease; }
.note-editor textarea { width: 100%; min-height: 60px; border: 1px solid var(--border); border-radius: 6px; padding: .5em; font-family: var(--font-ui); font-size: .82rem; resize: vertical; background: var(--surface); color: var(--text); }
.note-actions { display: flex; gap: .4em; margin-top: .4em; }
.note-save { font-size: .75rem; padding: .3em .8em; border-radius: 5px; background: var(--accent); color: #fff; font-weight: 600; }
.note-cancel { font-size: .75rem; padding: .3em .8em; border-radius: 5px; border: 1px solid var(--border); color: var(--text-2); }

/* Text highlight */
.highlight-popup { position: absolute; z-index: 200; display: flex; gap: .2em; padding: .3em; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow-lg); }
.highlight-popup button { font-size: 1rem; padding: .2em .4em; border-radius: 5px; transition: background var(--transition); }
.highlight-popup button:hover { background: var(--accent-bg); }
.user-highlight { background: #fef08a; border-radius: 2px; padding: 0 .1em; cursor: pointer; }
.user-highlight:hover { background: #fde047; }

/* Read next (inline, appears after reading a block) */
.read-next { margin: .5em 0 1.5em; opacity: 0; max-height: 0; overflow: hidden; transition: all .4s ease; clear: both; position: relative; z-index: 1; }
.read-next.rn-visible { opacity: 1; max-height: none; }
.rn-item { display: flex; flex-wrap: wrap; align-items: baseline; gap: .3em .6em; padding: .6em .8em; margin-bottom: .3em; background: var(--accent-bg); border: 1px solid var(--accent); border-radius: var(--radius-sm); cursor: pointer; transition: all var(--transition); }
.rn-item:hover { background: #fde68a; transform: translateX(3px); }
.rn-label { font-family: var(--font-ui); font-size: .6rem; font-weight: 600; text-transform: uppercase; color: var(--accent); white-space: nowrap; }
.rn-title { font-family: var(--font-ui); font-size: .82rem; font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; }
.rn-time { font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); flex-shrink: 0; }

/* Flag/report form */
.flag-form { margin-top: .5em; padding: .8em; background: #FEF2F2; border: 1px solid #FECACA; border-radius: var(--radius-sm); animation: fadeUp .2s ease; }
.flag-header { font-family: var(--font-ui); font-size: .8rem; font-weight: 600; color: #991B1B; margin-bottom: .5em; }
.flag-form select { width: 100%; padding: .4em; border: 1px solid #FECACA; border-radius: 5px; font-family: var(--font-ui); font-size: .8rem; margin-bottom: .4em; background: #fff; }
.flag-form textarea { width: 100%; min-height: 50px; border: 1px solid #FECACA; border-radius: 5px; padding: .5em; font-family: var(--font-ui); font-size: .8rem; resize: vertical; }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1em 0; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.table-wrap table { width: 100%; border-collapse: collapse; font-family: var(--font-ui); font-size: .85rem; }
.table-wrap th { background: var(--border-light); font-weight: 600; text-align: left; padding: .6em .8em; border-bottom: 2px solid var(--border); white-space: nowrap; }
.table-wrap td { padding: .5em .8em; border-bottom: 1px solid var(--border); vertical-align: top; }
.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap tr:hover td { background: rgba(0,0,0,.02); }

/* Code blocks */
pre { margin: 1em 0; padding: 1em; background: var(--border-light); border-radius: var(--radius-sm); overflow-x: auto; border: 1px solid var(--border); }
pre code { font-family: var(--font-mono); font-size: .82rem; line-height: 1.5; background: none; padding: 0; }

/* Diagrams */
.diagram-wrap { margin: 1.2em 0; padding: .8em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow-x: auto; text-align: center; }
.diagram-wrap svg { max-width: 100%; height: auto; }

/* Math (KaTeX) */
.katex-display { margin: 1em 0; overflow-x: auto; overflow-y: hidden; padding: .3em 0; }
.katex { font-size: 1.05em; }

/* Depth tabs - adaptive */
/* depth-group, d-tab, d-content, sb-block removed — all content is now spine */

/* Question blocks */
.q-block { margin: 2em 0; padding: 1.2em; border: 1.5px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.q-block h4 { font-family: var(--font-ui); font-size: .95rem; font-weight: 700; margin-bottom: .2em; }
.q-desc { font-size: .85rem; color: var(--text-2); margin-bottom: 1em; }
.q-opts { display: flex; flex-direction: column; gap: .4em; }
.q-opt { display: flex; align-items: flex-start; gap: .6em; padding: .6em .8em; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: .85rem; background: var(--bg); transition: all var(--transition); text-align: left; }
.q-opt:hover { border-color: var(--accent); background: var(--accent-bg); }
.q-opt.selected { border-color: var(--accent); background: var(--accent-bg); font-weight: 600; }
.q-letter { font-weight: 700; color: var(--accent); width: 1.2em; flex-shrink: 0; }

/* Question recommendations (appear after answering) */
.q-recs { margin-top: 1.2em; padding-top: 1em; border-top: 1px solid var(--border); }
.q-feedback { font-size: .9rem; line-height: 1.55; padding: .8em 1em; background: var(--accent-bg); border-left: 3px solid var(--accent); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 1em; color: var(--text); }
.q-recs-title { font-family: var(--font-ui); font-size: .8rem; font-weight: 600; color: var(--accent); margin-bottom: .6em; }
.q-rec-item .card { flex: none; width: 100%; margin-bottom: .4em; min-height: auto; }

/* Chapter nav */
.ch-nav { display: flex; justify-content: space-between; padding: 1.5em 0; margin-top: 2em; border-top: 1px solid var(--border); gap: .8em; }
.ch-nav-btn { font-family: var(--font-ui); font-size: .85rem; font-weight: 600; padding: .6em 1.2em; border-radius: var(--radius-sm); border: 1.5px solid var(--border); background: var(--surface); color: var(--text); transition: all var(--transition); max-width: 48%; }
.ch-nav-btn:hover { border-color: var(--accent); color: var(--accent); }
.ch-nav-btn .nl { font-size: .65rem; font-weight: 400; color: var(--text-3); text-transform: uppercase; letter-spacing: .04em; display: block; margin-bottom: .15em; }
.ch-nav-btn.disabled { opacity: .3; pointer-events: none; }

/* Inline feedback after each spine block */
.block-feedback { display: flex; align-items: center; gap: .3em; margin: .5em 0 1.5em; padding: .4em 0; }
.bf-btn { font-size: 1.1rem; padding: .3em; border-radius: 6px; transition: all var(--transition); opacity: .4; }
.bf-btn:hover { opacity: 1; background: var(--border-light); }
.bf-btn.active { opacity: 1; transform: scale(1.2); }

/* =============================================
   LINEAR NAVIGATION BAR (prev/next DFS)
   ============================================= */
.linear-nav { position: fixed; bottom: var(--bottomnav-h); left: 0; right: 0; height: 38px; background: var(--surface); border-top: 1px solid var(--border); display: flex; align-items: center; z-index: 190; padding: 0 .5em; }
.ln-btn { width: 44px; height: 34px; border-radius: 6px; font-size: 1rem; color: var(--text-2); display: flex; align-items: center; justify-content: center; transition: all var(--transition); flex-shrink: 0; }
.ln-btn:hover { background: var(--accent-bg); color: var(--accent); }
.ln-btn:disabled { opacity: .2; pointer-events: none; }
.ln-info { flex: 1; text-align: center; font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; padding: 0 .3em; line-height: 1.2; }
.ln-info:hover { color: var(--accent); }

/* Tutor / Chat view */
.chat-view-inner { display: flex; flex-direction: column; height: calc(100vh - var(--topbar-h) - var(--bottomnav-h) - 38px); padding: 0; }
.chat-view-inner .chat-messages { flex: 1; overflow-y: auto; padding: .8em; display: flex; flex-direction: column; gap: .5em; }
.chat-view-inner .chat-input-wrap { padding: .5em .8em; border-top: 1px solid var(--border); display: flex; gap: .4em; flex-shrink: 0; }

/* Tutor header */
.tutor-header { display: flex; align-items: center; gap: .6em; padding: .5em .8em; border-bottom: 1px solid var(--border); background: var(--surface); flex-shrink: 0; }
.tutor-avatar { font-size: 1.5rem; }
.tutor-info { flex: 1; }
.tutor-name { font-family: var(--font-ui); font-size: .85rem; font-weight: 700; display: block; }
.tutor-status { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); }
.tutor-author-btn { font-family: var(--font-ui); font-size: .7rem; font-weight: 600; color: var(--accent); background: var(--accent-bg); border: 1px solid var(--accent); border-radius: 6px; padding: .3em .6em; cursor: pointer; white-space: nowrap; }
.tutor-author-btn:hover { background: var(--accent); color: #fff; }

/* Typing indicator */
.tutor-typing { display: flex; gap: 4px; padding: .3em .8em; }
.tutor-typing span { width: 8px; height: 8px; background: var(--text-3); border-radius: 50%; animation: typingDot 1.2s infinite ease-in-out; }
.tutor-typing span:nth-child(2) { animation-delay: .2s; }
.tutor-typing span:nth-child(3) { animation-delay: .4s; }
@keyframes typingDot { 0%, 80%, 100% { transform: scale(.6); opacity: .4; } 40% { transform: scale(1); opacity: 1; } }

/* System messages & escalation */
.chat-msg.system { background: #FEF3C7; color: #92400E; align-self: center; text-align: center; font-size: .78rem; border-radius: 8px; }
.tutor-escalate-btn { font-family: var(--font-ui); font-size: .72rem; color: var(--accent); background: none; border: 1px solid var(--accent); border-radius: 5px; padding: .25em .5em; cursor: pointer; }
.tutor-escalate-btn:hover { background: var(--accent); color: #fff; }

/* Suggested questions */
.tutor-suggestions { display: flex; flex-direction: column; gap: .3em; padding: .3em 0; }
.tutor-suggest-btn { font-family: var(--font-ui); font-size: .78rem; color: var(--accent); background: var(--accent-bg); border: 1px solid transparent; border-radius: 8px; padding: .4em .7em; cursor: pointer; text-align: left; }
.tutor-suggest-btn:hover { border-color: var(--accent); }

/* Tutor button in block footer */
.tutor-btn:hover { color: var(--accent); }

/* Reading Paths */
.paths-section { max-width: 500px; margin: 0 auto; }
.path-card { display: flex; align-items: flex-start; gap: .8em; padding: .8em; margin-bottom: .5em; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: all var(--transition); position: relative; }
.path-card:hover { border-color: var(--accent); transform: translateY(-1px); box-shadow: var(--shadow); }
.path-active { border-color: var(--accent); background: var(--accent-bg); }
.path-complete { border-color: var(--product); }
.path-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: .1em; }
.path-info { flex: 1; min-width: 0; }
.path-title { font-family: var(--font-ui); font-size: .85rem; font-weight: 700; }
.path-desc { font-family: var(--font-ui); font-size: .75rem; color: var(--text-2); margin: .15em 0 .4em; }
.path-progress { display: flex; align-items: center; gap: .5em; }
.path-progress-bar { flex: 1; height: 5px; background: var(--border); border-radius: 3px; overflow: hidden; }
.path-progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width .3s; }
.path-complete .path-progress-fill { background: var(--product); }
.path-progress-text { font-family: var(--font-ui); font-size: .65rem; color: var(--text-3); white-space: nowrap; }
.path-badge { position: absolute; top: .4em; right: .5em; font-family: var(--font-ui); font-size: .55rem; font-weight: 700; color: #fff; background: var(--accent); padding: .15em .4em; border-radius: 4px; text-transform: uppercase; }
.path-detail { margin-top: 1em; padding: .8em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.path-detail h4 { font-size: .85rem; margin-bottom: .6em; }
.path-step { display: flex; align-items: center; gap: .6em; padding: .4em .3em; border-bottom: 1px solid var(--border-light); cursor: pointer; font-size: .8rem; }
.path-step:hover { background: var(--accent-bg); }
.path-step:last-child { border-bottom: none; }
.path-step-done { opacity: .5; }
.path-step-done .path-step-title { text-decoration: line-through; }
.path-step-num { width: 1.5em; height: 1.5em; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-size: .7rem; font-weight: 700; background: var(--accent-bg); color: var(--accent); flex-shrink: 0; }
.path-step-done .path-step-num { background: var(--product-bg); color: var(--product); }
.path-step-title { flex: 1; font-weight: 500; }
.path-step-ch { font-size: .65rem; color: var(--text-3); }

/* =============================================
   MAP VIEW (redesigned)
   ============================================= */
.map-inner { padding: 1em; max-width: 700px; margin: 0 auto; }

/* Header */
.map-header { text-align: center; margin-bottom: 2em; }
.map-title { font-family: var(--font-ui); font-size: 1.4rem; font-weight: 800; margin-bottom: .6em; }
.map-progress-summary { margin-bottom: 1em; }
.map-progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin-bottom: .4em; }
.map-progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width .5s ease; }
.map-progress-text { font-family: var(--font-ui); font-size: .8rem; color: var(--text-2); }

/* Legend */
.map-legend { display: flex; justify-content: center; gap: 1.2em; flex-wrap: wrap; }
.map-legend-item { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); display: flex; align-items: center; gap: .3em; }
.map-dot-legend { width: 8px; height: 8px; border-radius: 50%; background: var(--border); display: inline-block; }
.map-dot-legend.done { background: var(--product); }
.map-dot-legend.next { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
.map-dot-legend.depth-leg { background: transparent; border: 2px solid var(--text-3); }

/* Chapter cards */
.map-chapter { margin-bottom: 1em; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); overflow: hidden; }
.map-ch-locked { opacity: .6; }
.map-ch-head { display: flex; align-items: center; gap: .8em; padding: .8em 1em; cursor: pointer; transition: background var(--transition); }
.map-ch-head:hover { background: var(--border-light); }
.map-ch-ring { position: relative; width: 36px; height: 36px; flex-shrink: 0; }
.map-ch-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.map-ch-ring .map-ch-num { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-family: var(--font-ui); font-size: .75rem; font-weight: 800; color: var(--accent); }
.map-ch-info { flex: 1; min-width: 0; }
.map-ch-title { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; line-height: 1.2; }
.map-ch-sub { font-family: var(--font-ui); font-size: .72rem; color: var(--text-3); margin-top: .1em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.map-ch-stats { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); margin-top: .2em; }
.map-prereq { color: var(--accent); font-weight: 600; }
.map-ch-arrow { font-size: 1.4rem; color: var(--text-3); }

/* Block list */
.map-blocks { padding: 0 1em .5em; border-top: 1px solid var(--border); }
.map-spine-group { padding: .2em 0; }

/* Spine blocks */
.map-block { display: flex; align-items: center; gap: .5em; padding: .4em .5em; font-family: var(--font-ui); font-size: .82rem; color: var(--text-2); cursor: pointer; transition: all var(--transition); border-radius: 6px; }
.map-block:hover { background: var(--border-light); color: var(--text); }
.map-spine { font-weight: 500; }
.map-block.seen { color: var(--text-2); }
.map-block.seen .map-dot { background: #fbbf24; }
.map-block.read { color: var(--text-3); text-decoration: line-through; text-decoration-color: var(--border); }
.map-block.read .map-dot { background: var(--product); }
.map-block.read .map-block-title::after { content: ' ✓'; color: var(--product); text-decoration: none; font-size: .75em; }
.map-block.suggested { color: var(--accent); font-weight: 600; }
.map-block.suggested .map-dot { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
.seen-dot { background: #fbbf24 !important; }
.map-signals { font-size: .65rem; display: flex; gap: .1em; margin-left: auto; flex-shrink: 0; }

/* Dots */
.map-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); flex-shrink: 0; transition: all var(--transition); }
.map-dot.done { background: var(--product); }
.map-dot.next { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
.depth-dot { background: transparent !important; border: 2px solid var(--text-3); width: 7px; height: 7px; }

.map-block-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.map-block-time { font-size: .68rem; color: var(--text-3); flex-shrink: 0; }
.map-core-badge { font-family: var(--font-ui); font-size: .55rem; font-weight: 700; color: var(--accent); background: var(--accent-bg); padding: .1em .3em; border-radius: 3px; flex-shrink: 0; }
.map-game-tag { font-size: .7rem; flex-shrink: 0; }

/* Knowledge cloud */
.knowledge-cloud { display: flex; flex-wrap: wrap; gap: .25em .5em; justify-content: center; align-items: baseline; padding: .6em; line-height: 1.8; }
.cloud-word { font-family: var(--font-ui); font-weight: 600; color: var(--accent); white-space: nowrap; padding: .1em .3em; border-radius: 4px; transition: all .2s; cursor: default; }
.cloud-word:hover { background: var(--accent-bg); transform: scale(1.05); }

/* Voice tags in map */
.map-voice-tag { font-family: var(--font-ui); font-size: .58rem; font-weight: 700; text-transform: uppercase; padding: .12em .35em; border-radius: 3px; color: #fff; flex-shrink: 0; margin-left: auto; }
.map-voice-tag.engineer, .map-voice-tag.explorer { background: var(--engineer); }
.map-voice-tag.product, .map-voice-tag.creator { background: var(--product); }
.map-voice-tag.business, .map-voice-tag.thinker { background: var(--business); }

/* Children (depth cards indented) */

/* Map signals bar */
.map-signals-bar { display: flex; gap: .8em; justify-content: center; flex-wrap: wrap; margin: .6em 0; font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); }
.map-signals-bar span { display: flex; align-items: center; gap: .2em; }

/* Map data transparency note */
.map-data-note { margin-top: .6em; font-family: var(--font-ui); font-size: .75rem; }
.map-data-note summary { cursor: pointer; color: var(--text-3); font-weight: 500; }
.map-data-note summary:hover { color: var(--accent); }
.map-data-explain { margin-top: .5em; padding: .8em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: .78rem; line-height: 1.5; color: var(--text-2); }
.map-reset-btn { display: inline-block; margin-top: .5em; font-family: var(--font-ui); font-size: .72rem; padding: .3em .7em; border-radius: 5px; border: 1.5px solid #dc2626; color: #dc2626; background: none; cursor: pointer; }
.map-reset-btn:hover { background: #fef2f2; }

/* Map mode toggle */
.map-mode-toggle { display: flex; gap: .3em; justify-content: center; margin-top: .8em; }
.map-mode-btn { font-family: var(--font-ui); font-size: .75rem; font-weight: 600; padding: .35em .9em; border-radius: 20px; border: 1.5px solid var(--border); color: var(--text-3); transition: all var(--transition); }
.map-mode-btn:hover { border-color: var(--text-2); color: var(--text-2); }
.map-mode-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Legend (SVG-based) */
.map-legend { display: flex; gap: 1em; justify-content: center; flex-wrap: wrap; margin: .8em 0; }
.ml-item { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); display: flex; align-items: center; gap: .3em; }

/* ===== VISUAL RPG MAP ===== */
.visual-map-wrap { margin-top: 1em; }
.visual-map { width: 100%; height: auto; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.visual-map .map-node:hover rect:first-of-type { filter: brightness(0.95); }
.visual-map text { user-select: none; }

.vmap-legend { display: flex; gap: 1em; justify-content: center; flex-wrap: wrap; margin: .8em 0; font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); align-items: center; }
.vmap-legend span { display: flex; align-items: center; gap: .25em; }

.vmap-detail { margin-top: 1em; }

/* Signal icons inline */
.sig-icon { font-size: .6rem; padding: .1em .2em; border-radius: 3px; }
.sig-dwell { background: var(--border-light); font-family: var(--font-ui); font-size: .55rem; font-weight: 600; }
.sig-read { color: var(--product); }
.sig-seen { color: #fbbf24; }
.sig-liked { color: #dc2626; }
.sig-saved { color: var(--accent); }

/* Item detail inspector */
.item-detail { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2em; margin-top: .8em; box-shadow: var(--shadow); }
.id-head { display: flex; justify-content: space-between; align-items: flex-start; gap: .8em; margin-bottom: .4em; }
.id-head h3 { font-family: var(--font-ui); font-size: 1rem; font-weight: 700; flex: 1; }
.id-read-btn { font-family: var(--font-ui); font-size: .75rem; font-weight: 600; padding: .35em .8em; border-radius: 6px; background: var(--accent); color: #fff; white-space: nowrap; flex-shrink: 0; }
.id-read-btn:hover { background: var(--accent-hover); }
.id-teaser { font-size: .82rem; color: var(--text-2); margin-bottom: .8em; font-style: italic; }
.id-table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.id-table td { padding: .35em .5em; border-bottom: 1px solid var(--border); vertical-align: top; }
.id-label { color: var(--text-3); font-weight: 500; width: 9em; white-space: nowrap; }
.id-value { color: var(--text); }
.id-value code { font-family: var(--font-mono); font-size: .72rem; background: var(--border-light); padding: .1em .3em; border-radius: 3px; }
.id-section { font-weight: 700; font-size: .68rem; text-transform: uppercase; letter-spacing: .04em; color: var(--accent); padding-top: .8em !important; border-bottom: none !important; }
.id-actions { display: flex; gap: .4em; margin-top: .8em; }
.id-actions button { font-family: var(--font-ui); font-size: .75rem; font-weight: 600; padding: .35em .8em; border-radius: 6px; border: 1.5px solid var(--border); color: var(--text-2); }
.id-actions button:hover { border-color: var(--accent); color: var(--accent); }

/* =============================================
   MISSIONS VIEW
   ============================================= */
.missions-inner { padding: 1em; max-width: 560px; margin: 0 auto; }
.missions-head { margin-bottom: 1.2em; }
.missions-head h2 { font-family: var(--font-ui); font-size: 1.3rem; font-weight: 800; margin-bottom: .2em; }
.missions-head p { font-size: .82rem; color: var(--text-2); }

/* Mission cards (list view) */
.mission-card { display: flex; gap: .8em; padding: .8em; margin-bottom: .6em; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: all var(--transition); }
.mission-card:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.mission-complete { border-color: var(--product); background: var(--product-bg); }
.mission-locked { opacity: .5; cursor: default; }
.mission-locked:hover { transform: none; box-shadow: none; border-color: var(--border); }
.mission-active { border-color: var(--accent); }
.mission-icon { font-size: 1.8rem; flex-shrink: 0; display: flex; align-items: center; }
.mission-info { flex: 1; min-width: 0; }
.mission-title-row { display: flex; align-items: center; gap: .4em; margin-bottom: .2em; }
.mission-title { font-family: var(--font-ui); font-size: .88rem; font-weight: 700; }
.mission-diff { font-family: var(--font-ui); font-size: .55rem; font-weight: 700; color: #fff; padding: .15em .4em; border-radius: 4px; text-transform: uppercase; }
.mission-story { font-family: var(--font-ui); font-size: .75rem; color: var(--text-2); line-height: 1.35; margin-bottom: .4em; }
.mission-progress-dots { display: flex; gap: 4px; flex-wrap: wrap; }
.mission-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border); transition: all .2s; flex-shrink: 0; }
.mission-dot.done { background: var(--product); }
.mission-dot.current { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
.mission-dot.branch-dot { border-radius: 3px; }
.mission-meta { display: flex; justify-content: space-between; align-items: center; margin-top: .4em; font-family: var(--font-ui); font-size: .65rem; color: var(--text-3); }
.mission-reward-preview { color: var(--accent); font-weight: 600; }
.mission-complete-badge { color: var(--product); font-weight: 700; }

/* Mission detail view */
.mission-detail-header { display: flex; gap: .8em; align-items: center; margin-bottom: .6em; }
.mission-detail-icon { font-size: 2.5rem; }
.mission-detail-title { font-family: var(--font-ui); font-size: 1.15rem; font-weight: 800; }
.mission-detail-goal { font-family: var(--font-ui); font-size: .8rem; color: var(--accent); font-weight: 600; }
.mission-detail-story { font-size: .85rem; line-height: 1.5; color: var(--text-2); margin-bottom: 1em; padding: .8em; background: var(--surface-raised); border-radius: var(--radius-sm); border-left: 3px solid var(--accent); }
.mission-detail-progress { margin-bottom: 1em; }

/* Steps */
.mission-steps { margin-bottom: 1em; }
.mission-steps-label { font-family: var(--font-ui); font-size: .72rem; font-weight: 700; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; margin-bottom: .4em; }
.mission-step { display: flex; gap: .6em; padding: .5em .4em; border-bottom: 1px solid var(--border-light); cursor: pointer; transition: background .15s; }
.mission-step:hover { background: var(--accent-bg); }
.mission-step:last-child { border-bottom: none; }
.step-done { opacity: .5; }
.step-done .step-title { text-decoration: line-through; text-decoration-color: var(--border); }
.step-marker { width: 1.6em; height: 1.6em; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-size: .7rem; font-weight: 700; background: var(--accent-bg); color: var(--accent); flex-shrink: 0; margin-top: .1em; }
.step-done .step-marker { background: var(--product-bg); color: var(--product); }
.step-branch .step-marker { border-radius: 4px; }
.step-content { flex: 1; }
.step-title { font-family: var(--font-ui); font-size: .82rem; font-weight: 600; }
.step-meta { font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); }

/* Branch point */
.mission-branch-point { padding: .8em; margin: .5em 0; background: linear-gradient(135deg, var(--accent-bg), var(--surface)); border: 1.5px dashed var(--accent); border-radius: var(--radius); }
.branch-label { font-family: var(--font-ui); font-size: .82rem; font-weight: 700; color: var(--accent); margin-bottom: .2em; }
.branch-desc { font-size: .75rem; color: var(--text-2); margin-bottom: .6em; }
.branch-options { display: flex; flex-direction: column; gap: .4em; }
.branch-option { display: flex; align-items: center; gap: .5em; padding: .5em .7em; background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius-sm); cursor: pointer; text-align: left; font-family: var(--font-ui); transition: all .15s; }
.branch-option:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.branch-option.explorer { border-left: 3px solid var(--engineer); }
.branch-option.creator { border-left: 3px solid var(--product); }
.branch-option.thinker { border-left: 3px solid var(--business); }
.branch-icon { font-size: 1.2rem; }
.branch-name { font-size: .78rem; font-weight: 700; min-width: 4em; }
.branch-desc-text { font-size: .72rem; color: var(--text-2); flex: 1; }
.branch-count { font-size: .62rem; color: var(--accent); font-weight: 600; }
.mission-branch-chosen { padding: .5em; margin: .3em 0; background: var(--accent-bg); border-radius: var(--radius-sm); }
.mission-branch-chosen .branch-label { margin: 0; }

/* Rewards */
.mission-reward-earned { text-align: center; padding: 1em; background: linear-gradient(135deg, var(--product-bg), var(--accent-bg)); border-radius: var(--radius); margin-top: .8em; }
.reward-icon { font-size: 2rem; margin-bottom: .3em; }
.reward-text { font-family: var(--font-ui); font-size: .85rem; }
.mission-complete-action { text-align: center; margin-top: .8em; }
.mission-complete-btn { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; color: #fff; background: linear-gradient(135deg, var(--accent), #EC4899); border: none; border-radius: 8px; padding: .6em 1.5em; cursor: pointer; }
.mission-complete-btn:hover { opacity: .9; transform: translateY(-1px); }

/* Mission Wizard Mode */
/* =============================================
   MINI-GAMES
   ============================================= */
.game-block { margin: 1.5em 0; padding: 1em; background: var(--surface); border: 2px solid var(--accent); border-radius: var(--radius); }
.game-header { display: flex; align-items: center; gap: .5em; margin-bottom: .6em; }
.game-icon { font-size: 1.3rem; }
.game-header h4 { flex: 1; font-size: .9rem; }
.game-timer { font-family: var(--font-mono); font-size: .8rem; color: var(--accent); font-weight: 700; }
.game-start-btn { width: 100%; background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: .5em; font-family: var(--font-ui); font-size: .9rem; font-weight: 700; cursor: pointer; }
.game-start-btn:hover { opacity: .9; }
.game-area { min-height: 60px; }
.game-over { text-align: center; padding: .8em; font-size: .85rem; color: var(--text); }
.game-prompt { font-size: .82rem; color: var(--text-2); margin-bottom: .6em; text-align: center; }
.game-score { font-size: .72rem; color: var(--text-3); text-align: center; margin-top: .4em; }

/* Signal Sort */
.game-signal-card { text-align: center; padding: .6em; margin-bottom: .5em; font-size: .88rem; font-weight: 600; background: var(--surface-raised); border-radius: var(--radius-sm); }
.game-buckets { display: grid; grid-template-columns: 1fr 1fr; gap: .4em; }
.game-bucket { padding: .5em; border: 2px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: .8rem; font-weight: 600; cursor: pointer; background: var(--surface); }
.game-bucket.strong { border-color: #10B981; color: #065F46; }
.game-bucket.weak { border-color: #F59E0B; color: #92400E; }
.game-bucket:hover { opacity: .8; }
.game-correct { background: #D1FAE5 !important; border-color: #10B981 !important; }
.game-wrong { background: #FEE2E2 !important; border-color: #EF4444 !important; }

/* Taste Match */
.game-table { width: 100%; border-collapse: collapse; font-size: .7rem; margin: .4em 0; }
.game-table th, .game-table td { padding: .3em .2em; text-align: center; border-bottom: 1px solid var(--border-light); }
.game-table th { font-weight: 600; color: var(--text-3); font-size: .6rem; }
.game-you td { background: var(--accent-bg); font-weight: 600; }

/* Bubble Pop */
.game-bubble-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: .4em; }
.game-bubble-item { padding: .5em; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-size: .78rem; cursor: pointer; background: var(--surface); font-family: var(--font-ui); }
.game-bubble-item:hover { border-color: var(--accent); }
.game-bubble-item.in-bubble { background: #FEF3C7; border-color: #F59E0B; }
.game-bubble-item.popped { background: #D1FAE5; border-color: #10B981; opacity: .6; }

/* Pipeline Builder */
.game-pipeline-selected { margin-bottom: .5em; }
.game-pipe-step { padding: .35em .5em; margin-bottom: .2em; background: #D1FAE5; border-radius: var(--radius-sm); font-size: .78rem; font-weight: 500; }
.game-pipeline-options { display: flex; flex-direction: column; gap: .3em; }
.game-pipe-btn { text-align: left; padding: .4em .6em; border: 1.5px solid var(--border); border-radius: var(--radius-sm); font-family: var(--font-ui); font-size: .78rem; cursor: pointer; background: var(--surface); }
.game-pipe-btn:hover { border-color: var(--accent); }

.wizard-container { max-width: 500px; margin: 0 auto; padding: 1em; }
.wizard-progress { height: 6px; background: var(--border); border-radius: 3px; margin-bottom: .3em; overflow: hidden; }
.wizard-progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #EC4899); border-radius: 3px; transition: width .4s ease; }
.wizard-progress-label { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); text-align: center; margin-bottom: 1em; }
.wizard-intro { font-size: .9rem; line-height: 1.55; color: var(--text); padding: .8em; background: linear-gradient(135deg, var(--accent-bg), var(--surface)); border-left: 3px solid var(--accent); border-radius: var(--radius-sm); margin-bottom: 1em; font-style: italic; }
.wizard-block-card { background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 1.2em; cursor: pointer; transition: all var(--transition); margin-bottom: 1em; }
.wizard-block-card:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.wizard-block-title { font-family: var(--font-ui); font-size: 1rem; font-weight: 700; margin-bottom: .3em; }
.wizard-block-teaser { font-size: .82rem; color: var(--text-2); line-height: 1.45; margin-bottom: .5em; }
.wizard-block-meta { font-family: var(--font-ui); font-size: .7rem; color: var(--text-3); margin-bottom: .6em; }
.wizard-read-btn { width: 100%; background: var(--accent); color: #fff; border: none; border-radius: 8px; padding: .5em; font-family: var(--font-ui); font-size: .85rem; font-weight: 600; cursor: pointer; }
.wizard-read-btn:hover { opacity: .9; }
.wizard-nav { display: flex; justify-content: space-between; align-items: center; margin-top: .5em; }
.wizard-nav-btn { font-family: var(--font-ui); font-size: .8rem; font-weight: 600; color: var(--accent); background: var(--accent-bg); border: 1px solid var(--accent); border-radius: 6px; padding: .35em .8em; cursor: pointer; }
.wizard-nav-btn:hover { background: var(--accent); color: #fff; }
.wizard-nav-next { background: var(--accent); color: #fff; }

/* Boss quiz */
.boss-card { text-align: center; padding: 1.2em; background: var(--surface); border: 2px solid var(--accent); border-radius: var(--radius); }
.boss-icon { font-size: 2.5rem; margin-bottom: .3em; }
.boss-title { font-family: var(--font-ui); font-size: 1rem; font-weight: 800; color: var(--accent); margin-bottom: .5em; }
.boss-question { font-size: .88rem; line-height: 1.5; margin-bottom: .8em; text-align: left; }
.boss-answer { width: 100%; border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: .6em; font-family: var(--font-body); font-size: .85rem; resize: vertical; background: var(--bg); color: var(--text); }
.boss-answer:focus { border-color: var(--accent); outline: none; }
.boss-actions { margin-top: .6em; }
.boss-submit { background: linear-gradient(135deg, #EF4444, #F59E0B); color: #fff; border: none; border-radius: 8px; padding: .5em 1.5em; font-family: var(--font-ui); font-size: .9rem; font-weight: 700; cursor: pointer; }
.boss-submit:hover { opacity: .9; transform: translateY(-1px); }
.boss-hint { margin-top: .6em; padding: .6em; border-radius: var(--radius-sm); font-size: .82rem; text-align: left; }
.boss-pass { background: #D1FAE5; color: #065F46; border: 1px solid #10B981; }
.boss-retry { background: #FEF3C7; color: #92400E; border: 1px solid #F59E0B; }

/* Mission intro banner in read view */
.mission-intro-banner { display: flex; align-items: flex-start; gap: .5em; padding: .6em .8em; margin-bottom: 1em; background: linear-gradient(135deg, var(--accent-bg), #F5F3FF); border: 1px solid var(--accent); border-radius: var(--radius-sm); font-size: .82rem; line-height: 1.4; color: var(--text); }
.mission-intro-text { flex: 1; font-style: italic; }
.mission-intro-close { background: none; border: none; font-size: 1.1rem; color: var(--text-3); cursor: pointer; padding: 0; line-height: 1; flex-shrink: 0; }

/* Topic tags on cards */
.card-topics { display: flex; gap: .2em; flex-wrap: wrap; }
.card-topic { font-family: var(--font-ui); font-size: .55rem; padding: .15em .4em; border-radius: 3px; background: var(--border-light); color: var(--text-3); cursor: pointer; transition: all var(--transition); }
.card-topic:hover { background: var(--accent-bg); color: var(--accent); }

/* =============================================
   CHAT (inline in context panel on desktop, slide-up on mobile)
   ============================================= */
/* Inline chat in context panel */
.ctx-chat-messages { max-height: 200px; overflow-y: auto; display: flex; flex-direction: column; gap: .3em; margin-bottom: .5em; }
.ctx-chat-input { display: flex; gap: .3em; }
.ctx-chat-input input { flex: 1; border: 1px solid var(--border); border-radius: 6px; padding: .35em .5em; font-family: var(--font-ui); font-size: .78rem; background: var(--bg); color: var(--text); outline: none; }
.ctx-chat-input input:focus { border-color: var(--accent); }
.ctx-chat-input button { background: var(--accent); color: #fff; border-radius: 6px; padding: .3em .6em; font-size: .85rem; }

/* Mobile chat panel (slide-up) */
/* old mobile chat removed — chat is now a tab view */
.chat-head { display: flex; justify-content: space-between; align-items: center; padding: .6em 1em; border-bottom: 1px solid var(--border); font-family: var(--font-ui); font-size: .85rem; font-weight: 700; }
.chat-head button { font-size: 1rem; color: var(--text-3); padding: .2em; }
.chat-messages { flex: 1; overflow-y: auto; padding: .8em; display: flex; flex-direction: column; gap: .5em; }
.chat-msg { font-family: var(--font-ui); font-size: .82rem; line-height: 1.45; padding: .6em .8em; border-radius: 12px; max-width: 85%; }
.chat-msg.bot { background: var(--border-light); color: var(--text); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg.user { background: var(--accent); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-msg a { color: var(--accent); font-weight: 600; }
.chat-msg.bot a { color: var(--accent); }
.chat-msg i { color: var(--text-2); font-size: .78rem; }
.chat-input-wrap { display: flex; gap: .4em; padding: .5em .8em; border-top: 1px solid var(--border); }
.chat-input-wrap input { flex: 1; border: 1px solid var(--border); border-radius: 8px; padding: .4em .7em; font-family: var(--font-ui); font-size: .82rem; background: var(--bg); color: var(--text); outline: none; }
.chat-input-wrap input:focus { border-color: var(--accent); }
.chat-input-wrap button { background: var(--accent); color: #fff; border-radius: 8px; padding: .4em .7em; font-size: .9rem; }
/* fab-chat removed — chat is a bottom tab now */

@media (min-width: 900px) {
  /* chat is a tab view, no special desktop handling needed */
}
@media (max-width: 500px) {
  .chat-view-inner { height: calc(100vh - var(--topbar-h) - var(--bottomnav-h) - 42px); }
  .topic-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}

/* Responsive visual map */
@media (max-width: 600px) {
  .visual-map { min-height: 200px; }
  .id-table { font-size: .72rem; }
}

/* =============================================
   PROFILE VIEW
   ============================================= */
.profile-inner { padding: 1em; max-width: 500px; margin: 0 auto; }
.profile-section { margin-bottom: 1.5em; }
.profile-section h3 { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; margin-bottom: .8em; }

/* Gamification */
.gami-hero { display: flex; align-items: center; gap: .8em; padding: 1em; background: linear-gradient(135deg, var(--accent-bg), var(--surface)); border: 2px solid var(--accent); border-radius: var(--radius); margin-bottom: 1em; }
.gami-level { font-family: var(--font-ui); font-size: 1.8rem; font-weight: 900; color: var(--accent); flex-shrink: 0; width: 3em; text-align: center; }
.gami-info { flex: 1; }
.gami-title { font-family: var(--font-ui); font-size: 1rem; font-weight: 800; margin-bottom: .3em; }
.gami-xp-bar { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; margin-bottom: .2em; }
.gami-xp-fill { height: 100%; background: linear-gradient(90deg, var(--accent), #EC4899); border-radius: 4px; transition: width .5s ease; }
.gami-xp-text { font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); }
.gami-streak { font-family: var(--font-ui); font-size: .82rem; font-weight: 700; color: #EF4444; text-align: center; flex-shrink: 0; }

.gami-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: .4em; margin-bottom: 1.2em; }
.gami-stat { text-align: center; padding: .5em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.gs-num { display: block; font-family: var(--font-ui); font-size: 1.2rem; font-weight: 800; color: var(--accent); }
.gs-label { font-family: var(--font-ui); font-size: .62rem; color: var(--text-3); text-transform: uppercase; letter-spacing: .04em; }

.gami-badges { display: flex; flex-wrap: wrap; gap: .4em; margin-bottom: .8em; }
.gami-badge { display: flex; align-items: center; gap: .3em; padding: .3em .6em; border-radius: 20px; font-family: var(--font-ui); font-size: .72rem; border: 1.5px solid var(--border); transition: all var(--transition); }
.gami-badge.earned { background: var(--accent-bg); border-color: var(--accent); }
.gami-badge.locked { opacity: .4; }
.badge-icon { font-size: .85rem; }
.badge-name { font-weight: 600; }
.stat-row { display: flex; justify-content: space-between; padding: .4em 0; font-family: var(--font-ui); font-size: .85rem; }
.stat-val { font-weight: 600; color: var(--accent); }
.voice-bars { display: flex; flex-direction: column; gap: .4em; }
.voice-bar { display: flex; align-items: center; gap: .6em; font-family: var(--font-ui); font-size: .8rem; }
.voice-bar-fill { height: 6px; border-radius: 3px; transition: width .3s ease; }
.voice-bar-label { width: 5em; font-weight: 600; text-transform: uppercase; font-size: .7rem; }
.saved-list { display: flex; flex-direction: column; gap: .3em; }
.saved-item { font-family: var(--font-ui); font-size: .85rem; padding: .5em .7em; border-radius: var(--radius-sm); background: var(--border-light); cursor: pointer; transition: background var(--transition); }
.saved-item:hover { background: var(--accent-bg); }

/* =============================================
   FEEDBACK BAR
   ============================================= */
.feedback-bar { position: fixed; bottom: calc(var(--bottomnav-h) + .5em); left: 50%; transform: translateX(-50%); background: var(--surface-raised); border: 1px solid var(--border); border-radius: 30px; padding: .4em .6em .4em 1em; display: flex; align-items: center; gap: .6em; box-shadow: var(--shadow-lg); z-index: 150; animation: slideUp .3s ease; }
.fb-label { font-family: var(--font-ui); font-size: .78rem; color: var(--text-2); white-space: nowrap; }
.fb-buttons { display: flex; gap: .2em; }
.fb-btn { font-size: 1.2rem; padding: .3em .4em; border-radius: 8px; transition: all var(--transition); }
.fb-btn:hover { background: var(--border-light); transform: scale(1.15); }

/* =============================================
   SETTINGS DRAWER
   ============================================= */
.settings-drawer { position: fixed; inset: 0; z-index: 400; display: none; }
.settings-drawer.open { display: flex; }
.settings-drawer::before { content: ''; position: absolute; inset: 0; background: rgba(0,0,0,.3); }
.settings-inner { position: absolute; right: 0; top: 0; bottom: 0; width: 280px; background: var(--surface); padding: 1.2em; overflow-y: auto; animation: slideLeft .25s ease; z-index: 1; }
.settings-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5em; }
.settings-head h3 { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; }
.settings-head button { font-size: 1.2rem; color: var(--text-2); }
.sg { margin-bottom: 1.2em; }
.sg label { font-family: var(--font-ui); font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-3); display: block; margin-bottom: .4em; }
.sg-row { display: flex; gap: .3em; flex-wrap: wrap; }
.sg-opt { font-family: var(--font-ui); font-size: .78rem; padding: .35em .7em; border-radius: 6px; border: 1.5px solid var(--border); color: var(--text-2); transition: all var(--transition); }
.sg-opt:hover { border-color: var(--text-2); }
.sg-opt.active { border-color: var(--accent); background: var(--accent-bg); color: var(--accent); font-weight: 600; }
.sg-info { font-family: var(--font-ui); font-size: .8rem; color: var(--text-3); }

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translate(-50%, 10px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes slideLeft { from { transform: translateX(100%); } to { transform: translateX(0); } }
.fade-up { animation: fadeUp .3s ease; }

/* =============================================
   DESKTOP (> 900px)
   ============================================= */
@media (min-width: 900px) {
  #appMain { padding-bottom: var(--bottomnav-h); }
  .topbar { padding: 0 1.5em; }
  .card { flex: 0 0 280px; }
  .card-hero { flex: 0 0 380px; }
  .shelf-scroll { padding: 0 1.5em .5em; }
  .shelf-head { padding: 0 1.5em; }
  .read-layout { display: grid; grid-template-columns: 1fr 280px; gap: 2em; padding: 0 1.5em; }
  .read-pane { padding: 1.5em 0 4em; }
  .context-panel { display: block; padding-top: 1em; position: sticky; top: calc(var(--topbar-h) + .5em); max-height: calc(100vh - var(--topbar-h) - var(--bottomnav-h) - 50px); overflow-y: auto; overflow-x: hidden; scrollbar-width: none; }
  .context-panel::-webkit-scrollbar { display: none; }
  .ctx-section { margin-bottom: .8em; padding: .8em; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); display: none; }
  .ctx-section h4 { font-family: var(--font-ui); font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .03em; color: var(--text-3); margin-bottom: .5em; }
  .ctx-current-title { font-family: var(--font-ui); font-size: .9rem; font-weight: 700; margin-bottom: .4em; line-height: 1.2; }
  .ctx-meta-row { display: flex; gap: .5em; font-family: var(--font-ui); font-size: .68rem; color: var(--text-3); margin-bottom: .4em; flex-wrap: wrap; }
  .ctx-topics { display: flex; gap: .2em; flex-wrap: wrap; margin-bottom: .4em; }
  .ctx-topic { font-family: var(--font-ui); font-size: .6rem; padding: .15em .4em; border-radius: 3px; background: var(--border-light); color: var(--text-3); cursor: pointer; transition: all var(--transition); }
  .ctx-topic:hover { background: var(--accent-bg); color: var(--accent); }
  .ctx-depths { font-family: var(--font-ui); font-size: .68rem; display: flex; align-items: center; gap: .3em; flex-wrap: wrap; }
  .ctx-depths-label { color: var(--text-3); }
  .ctx-depth-badge { font-size: .58rem; font-weight: 700; text-transform: uppercase; padding: .12em .35em; border-radius: 3px; color: #fff; }
  .ctx-depth-badge.engineer, .ctx-depth-badge.explorer { background: var(--engineer); }
  .ctx-depth-badge.product, .ctx-depth-badge.creator { background: var(--product); }
  .ctx-depth-badge.business, .ctx-depth-badge.thinker { background: var(--business); }
  /* Quiz */
  .ctx-quiz { font-family: var(--font-ui); }
  .ctx-quiz-q { font-size: .82rem; font-weight: 500; margin-bottom: .5em; line-height: 1.4; }
  .ctx-quiz-reveal { font-size: .75rem; padding: .35em .8em; border-radius: 6px; background: var(--accent); color: #fff; font-weight: 600; }
  .ctx-quiz-a { font-size: .8rem; color: var(--product); margin-top: .5em; padding: .5em; background: var(--product-bg); border-radius: 6px; line-height: 1.4; }
  .ctx-item { display: flex; flex-direction: column; gap: .1em; padding: .4em .5em; border-radius: 6px; font-family: var(--font-ui); font-size: .8rem; cursor: pointer; transition: background var(--transition); }
  .ctx-item:hover { background: var(--border-light); }
  .ctx-item span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .ctx-note-item { border-left: 2px solid var(--accent); padding-left: .7em; }
  .ctx-note-title { font-weight: 600; font-size: .75rem; }
  .ctx-note-text { font-size: .68rem; color: var(--text-3); font-style: italic; }
  .ctx-next { display: block; padding: .6em .7em; background: var(--accent-bg); border-radius: 6px; font-family: var(--font-ui); font-size: .82rem; cursor: pointer; transition: background var(--transition); }
  .ctx-next:hover { background: #fde68a; }
  .ctx-next-label { display: block; font-size: .65rem; font-weight: 600; text-transform: uppercase; color: var(--accent); margin-bottom: .15em; }
  /* Desktop: show nav links in topbar instead of bottom */
  .topbar::after { content: ''; } /* placeholder */
  .feedback-bar { bottom: 1em; }
}
@media (max-width: 899px) {
  .context-panel { display: none; }
}
@media (max-width: 500px) {
  :root { --fs: 1rem; }
  .onboarding-card h1 { font-size: 1.6rem; }
  .card { flex: 0 0 220px; min-height: 120px; padding: .8em; }
  .card-hero { flex: 0 0 calc(100% - 2em); }
}
/* Larger screens */
@media (min-width: 600px) {
  .onboarding-card { max-width: 580px; }
  .intro-title { font-size: 2.2rem; }
  .intro-tagline { font-size: .95rem; }
  .intro-author-name { font-size: 1.3rem; }
  .intro-hero { max-width: 520px; }
  .home-modes { max-width: 520px; grid-template-columns: repeat(4, 1fr); }
  .intro-voices { max-width: 420px; margin-left: auto; margin-right: auto; }
}
@media (min-width: 900px) {
  .onboarding-card { max-width: 660px; }
  .intro-title { font-size: 2.5rem; }
  .intro-hero { max-width: 580px; }
  .home-modes { max-width: 580px; gap: .6em; }
  .home-mode { padding: .8em .5em; }
  .home-mode-label { font-size: .82rem; }
}
@media print { .topbar, .bottom-nav, .feedback-bar, .q-block, .settings-drawer, .search-overlay, .game-block { display: none !important; } #appMain { padding: 0; } .read-pane { max-width: 100%; } }