:root{
  --void:#0a0a0a; --panel:#121212; --panel2:#181818; --panel3:#1e1e1e;
  --line:#272727; --line-soft:#1c1c1c;
  --red:#ff1f3d; --red-dim:#c21230; --red-deep:#5c0a18; --red-glow:rgba(255,31,61,.35);
  --white:#f3f1ec; --paper:#e9e6de; --muted:#8d8d8a; --muted2:#5a5a58;
  --amber:#e8a33d;
  --display: "Arial Narrow","Helvetica Neue Condensed","Roboto Condensed",Arial,sans-serif;
  --body: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono: ui-monospace,"SF Mono","Cascadia Code","Courier New",monospace;
  --sidebar-w: 308px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--void);color:var(--white);font-family:var(--body);
  -webkit-font-smoothing:antialiased; overflow-x:hidden;}
::selection{background:var(--red);color:#0a0a0a}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--red);outline-offset:2px}
button:focus-visible, .chip:focus-visible, .fcard:focus-visible{outline:2px solid var(--red);outline-offset:2px}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--void)}
::-webkit-scrollbar-thumb{background:#2b2b2b;border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:var(--red-dim)}

/* ---------- Background grid atmosphere ---------- */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,31,61,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,31,61,.045) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse 80% 60% at 30% 20%, black 10%, transparent 75%);
}
.bg-glow{position:fixed;top:-20%;left:-10%;width:60vw;height:60vw;z-index:0;pointer-events:none;
  background:radial-gradient(circle, var(--red-glow) 0%, transparent 65%);
  filter:blur(40px); opacity:.5;}

/* ---------- App shell ---------- */
.app{position:relative;z-index:1;display:grid;grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh}

/* ---------- Sidebar ---------- */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
  background:linear-gradient(180deg,#0d0d0d, #0a0a0a 60%);
  border-right:1px solid var(--line);display:flex;flex-direction:column;z-index:40;}
.brand{padding:26px 22px 18px;border-bottom:1px solid var(--line-soft)}
.brand-mark{font-family:var(--display);font-weight:900;font-size:27px;letter-spacing:.5px;line-height:.9;text-transform:uppercase}
.brand-mark .d{color:var(--red)}
.brand-mark .c{color:var(--white)}
.brand-sub{margin-top:6px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--muted2);text-transform:uppercase}

.viewtabs{display:flex;gap:2px;padding:14px 14px 8px;border-bottom:1px solid var(--line-soft)}
.viewtab{flex:1;padding:9px 4px;text-align:center;background:var(--panel);border:1px solid var(--line);
  color:var(--muted);font-family:var(--mono);font-size:10px;letter-spacing:.08em;text-transform:uppercase;
  cursor:pointer;transition:.15s;border-radius:3px}
.viewtab:hover{color:var(--white);border-color:#3a3a3a}
.viewtab.active{background:var(--red);border-color:var(--red);color:#0a0a0a;font-weight:700}

.lang-switch{display:flex;gap:2px;padding:0 14px 12px}
.lang-btn{flex:1;padding:7px 4px;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font-family:var(--mono);font-size:10.5px;font-weight:700;letter-spacing:.05em;cursor:pointer;border-radius:3px}
.lang-btn:hover{color:var(--white);border-color:#3a3a3a}
.lang-btn.active{background:var(--white);border-color:var(--white);color:#0a0a0a}

.sidebar-scroll{flex:1;overflow-y:auto;padding:10px 0 30px}

.nav-part{padding:16px 22px 6px;display:flex;flex-direction:column;gap:1px}
.nav-part-label{font-family:var(--mono);font-size:10px;color:var(--red);letter-spacing:.15em}
.nav-part-title{font-family:var(--display);font-size:13px;letter-spacing:.3px;color:var(--muted);text-transform:uppercase}
.nav-link{display:flex;align-items:baseline;gap:10px;padding:7px 22px;font-size:13.5px;color:#c9c9c6;
  border-left:2px solid transparent;cursor:pointer;transition:.12s;}
.nav-link:hover{background:var(--panel);color:var(--white)}
.nav-link.active{border-left-color:var(--red);background:var(--panel2);color:var(--white);font-weight:600}
.nav-num{font-family:var(--mono);font-size:11px;color:var(--muted2);min-width:16px}
.nav-link.active .nav-num{color:var(--red)}

.sidebar-foot{padding:14px 22px;border-top:1px solid var(--line-soft);font-family:var(--mono);
  font-size:9.5px;color:var(--muted2);letter-spacing:.06em}

/* ---------- Main ---------- */
.main{grid-column:2;margin-left:var(--sidebar-w);min-height:100vh;position:relative}
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  padding:14px 44px;background:rgba(10,10,10,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft)}
.topbar-crumb{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.topbar-crumb b{color:var(--red)}
.lang-switch-top{display:flex;gap:2px}
.lang-btn-top{padding:6px 10px;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font-family:var(--mono);font-size:10px;font-weight:700;cursor:pointer;border-radius:3px}
.lang-btn-top:hover{color:var(--white);border-color:#3a3a3a}
.lang-btn-top.active{background:var(--white);border-color:var(--white);color:#0a0a0a}
.progress-track{width:180px;height:3px;background:var(--line);border-radius:2px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--red-deep),var(--red));width:0%;transition:width .3s}

.view{display:none}
.view.active{display:block}

/* ---------- HOME / HERO ---------- */
#view-home{padding:0}
.hero{padding:110px 60px 80px;max-width:1180px}
.hero-eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.25em;color:var(--red);text-transform:uppercase;margin-bottom:22px}
.hero-title{font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(46px,7vw,96px);line-height:.88;letter-spacing:-.5px;margin:0}
.hero-title .line2{color:var(--muted2);-webkit-text-stroke:1px #4a4a4a;color:transparent}
.hero-desc{margin-top:30px;max-width:640px;font-size:17px;line-height:1.75;color:#c9c9c6}
.hero-cta{margin-top:40px;display:flex;gap:14px;flex-wrap:wrap}
.btn{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:15px 26px;
  border-radius:2px;cursor:pointer;border:1px solid var(--line);transition:.15s;display:inline-flex;align-items:center;gap:10px}
.btn-primary{background:var(--red);color:#0a0a0a;border-color:var(--red);font-weight:700}
.btn-primary:hover{background:#ff3d57;box-shadow:0 0 30px var(--red-glow)}
.btn-ghost{background:transparent;color:var(--white);border-color:#333}
.btn-ghost:hover{border-color:var(--red);color:var(--red)}

.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin:70px 60px 0;max-width:1180px;border:1px solid var(--line)}
.stat{background:var(--void);padding:26px 24px}
.stat-num{font-family:var(--display);font-size:38px;color:var(--red);font-weight:900}
.stat-label{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-top:4px}

/* ---------- Layers signature diagram ---------- */
.layers-section{padding:100px 60px;max-width:1180px}
.layers-head{margin-bottom:56px}
.layers-eyebrow{font-family:var(--mono);font-size:12px;color:var(--red);letter-spacing:.2em;text-transform:uppercase}
.layers-title{font-family:var(--display);font-weight:900;text-transform:uppercase;font-size:clamp(28px,4vw,46px);margin-top:10px}
.layers-title span{color:var(--red)}
.layers-p{max-width:620px;color:var(--muted);margin-top:16px;line-height:1.7;font-size:15px}

.stack{display:flex;flex-direction:column;gap:0;max-width:760px}
.layer{position:relative;display:grid;grid-template-columns:90px 1fr;gap:26px;padding:30px 28px;
  border:1px solid var(--line);border-top:none;background:var(--panel);
  opacity:0;transform:translateY(16px);animation:layerIn .7s forwards;}
.layer:first-child{border-top:1px solid var(--line)}
.layer:nth-child(1){animation-delay:.05s}
.layer:nth-child(2){animation-delay:.25s}
.layer:nth-child(3){animation-delay:.45s}
.layer:nth-child(4){animation-delay:.65s;background:linear-gradient(90deg, var(--red-deep), #120508)}
@keyframes layerIn{to{opacity:1;transform:translateY(0)}}
.layer-index{font-family:var(--mono);font-size:11px;color:var(--red);letter-spacing:.1em;align-self:start;padding-top:4px}
.layer-body h3{font-family:var(--display);font-size:20px;text-transform:uppercase;margin:0 0 8px;letter-spacing:.3px}
.layer-body p{margin:0;color:#b8b8b5;font-size:14px;line-height:1.6}
.layer:nth-child(4) .layer-body h3{color:var(--red)}
.layer-connector{position:absolute;left:44px;bottom:-1px;width:2px;height:1px;background:var(--red)}
.pulse-dot{position:absolute;left:41px;top:-4px;width:8px;height:8px;border-radius:50%;background:var(--red);
  box-shadow:0 0 12px var(--red);animation:pulseMove 3.2s ease-in-out infinite;opacity:0}
@keyframes pulseMove{
  0%{top:0%;opacity:0} 5%{opacity:1} 90%{opacity:1} 100%{top:100%;opacity:0}
}
@media (prefers-reduced-motion: reduce){
  .layer{animation:none;opacity:1;transform:none}
  .pulse-dot{animation:none;display:none}
}

/* ---------- Chapter content ---------- */
.chapter{padding:70px 60px 40px;max-width:820px}
.chapter-eyebrow{font-family:var(--mono);font-size:11.5px;color:var(--red);letter-spacing:.15em;text-transform:uppercase;margin-bottom:18px}
.chapter-title{font-family:var(--display);font-weight:900;text-transform:uppercase;
  font-size:clamp(28px,4vw,44px);line-height:1.05;margin:0 0 42px;letter-spacing:-.2px;
  border-bottom:2px solid var(--line);padding-bottom:28px}
.chapter-body{font-size:16.5px;line-height:1.85;color:#d8d6d1}
.chapter-body h2{font-family:var(--display);font-weight:800;text-transform:uppercase;font-size:24px;
  color:var(--white);margin:46px 0 16px;letter-spacing:.2px;position:relative;padding-left:18px}
.chapter-body h2::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;background:var(--red)}
.chapter-body h3{font-family:var(--mono);font-size:14px;color:var(--amber);text-transform:uppercase;
  letter-spacing:.05em;margin:30px 0 10px}
.chapter-body p{margin:0 0 20px}
.chapter-body strong{color:var(--white);font-weight:700}
.chapter-body em{color:var(--muted)}
.chapter-body ul{margin:0 0 22px;padding-left:0;list-style:none}
.chapter-body li{position:relative;padding:8px 0 8px 26px;border-bottom:1px solid var(--line-soft);font-size:15.5px}
.chapter-body li::before{content:"—";position:absolute;left:0;color:var(--red)}
.chapter-body hr.divider{border:none;border-top:1px solid var(--line);margin:46px 0}
.table-wrap{overflow-x:auto;margin:24px 0 30px;border:1px solid var(--line)}
.chapter-body table{width:100%;border-collapse:collapse;font-size:14px}
.chapter-body th{background:var(--panel2);color:var(--red);font-family:var(--mono);font-size:11px;
  text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:12px 14px;border-bottom:1px solid var(--line)}
.chapter-body td{padding:12px 14px;border-bottom:1px solid var(--line-soft);color:#c9c9c6}
.chapter-body tr:last-child td{border-bottom:none}

/* editorial callout boxes */
.edit-box{margin:28px 0;padding:20px 24px;border-left:3px solid var(--red);background:var(--panel2);
  border-radius:0 3px 3px 0}
.edit-box-label{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--red);margin-bottom:8px;font-weight:700}
.edit-box p{margin:0;font-size:14.5px;line-height:1.7;color:#d0cfc9}
.edit-box.box-key{border-left-color:var(--red)}
.edit-box.box-evidence{border-left-color:var(--amber)}
.edit-box.box-evidence .edit-box-label{color:var(--amber)}
.edit-box.box-practice{border-left-color:#4a9d8f}
.edit-box.box-practice .edit-box-label{color:#4a9d8f}
.edit-box.box-trivia{border-left-color:#7a7ad6}
.edit-box.box-trivia .edit-box-label{color:#9a9af0}

.glossary-body p{padding:12px 0;border-bottom:1px solid var(--line-soft);margin:0}
.glossary-body strong{color:var(--red)}

.chapter-nav{display:flex;justify-content:space-between;gap:16px;max-width:820px;margin:50px 60px 100px;padding-top:30px;border-top:1px solid var(--line)}
.chapnav-btn{flex:1;padding:18px 20px;border:1px solid var(--line);background:var(--panel);cursor:pointer;transition:.15s}
.chapnav-btn:hover{border-color:var(--red)}
.chapnav-btn .cn-label{font-family:var(--mono);font-size:10px;color:var(--muted2);letter-spacing:.1em;text-transform:uppercase}
.chapnav-btn .cn-title{font-family:var(--display);font-size:16px;margin-top:4px;text-transform:uppercase}
.chapnav-btn.next{text-align:right}

/* ---------- Fórmulas view ---------- */
#view-formulas{padding:60px 60px 100px}
.formulas-head{max-width:900px;margin-bottom:14px}
.formulas-title{font-family:var(--display);font-weight:900;text-transform:uppercase;font-size:clamp(30px,4vw,50px);margin:0}
.formulas-title span{color:var(--red)}
.formulas-desc{color:var(--muted);max-width:680px;margin-top:14px;line-height:1.7;font-size:15px}
.disclaimer-banner{margin:26px 0 34px;max-width:900px;padding:16px 20px;border:1px solid var(--red-dim);
  background:rgba(255,31,61,.06);font-family:var(--mono);font-size:12px;color:#e7b3ba;line-height:1.6}
.disclaimer-banner b{color:var(--red)}

.filter-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:34px}
.chip{padding:8px 16px;border:1px solid var(--line);border-radius:20px;font-family:var(--mono);font-size:11.5px;
  letter-spacing:.04em;color:var(--muted);cursor:pointer;transition:.15s;text-transform:uppercase}
.chip:hover{border-color:var(--red);color:var(--white)}
.chip.active{background:var(--red);border-color:var(--red);color:#0a0a0a;font-weight:700}

.search-wrap{max-width:420px;margin-bottom:30px;position:relative}
.search-input{width:100%;padding:13px 16px 13px 40px;background:var(--panel);border:1px solid var(--line);
  color:var(--white);font-family:var(--body);font-size:14px;border-radius:3px}
.search-input:focus{outline:none;border-color:var(--red)}
.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--muted2);font-size:14px}

.formula-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:14px}
.fcard{background:var(--panel);border:1px solid var(--line);padding:22px 20px;cursor:pointer;transition:.18s;position:relative;overflow:hidden}
.fcard:hover{border-color:var(--red);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,0,0,.4)}
.fcard::before{content:"";position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--red);
  transform:scaleY(0);transform-origin:top;transition:.2s}
.fcard:hover::before{transform:scaleY(1)}
.fcard-num{font-family:var(--mono);font-size:10.5px;color:var(--red);letter-spacing:.1em}
.fcard-name{font-family:var(--display);font-size:19px;text-transform:uppercase;margin:8px 0 6px;letter-spacing:.2px}
.fcard-subtitle{font-size:12.5px;color:var(--muted);line-height:1.5;min-height:36px}
.fcard-tag{display:inline-block;margin-top:14px;font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--amber);border:1px solid #3a2f18;padding:4px 9px;border-radius:12px}
.no-results{color:var(--muted);font-family:var(--mono);font-size:13px;padding:40px 0}

/* ---------- Modal: educational document ---------- */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(4px);z-index:100;
  display:none;align-items:flex-start;justify-content:center;padding:40px 20px;overflow-y:auto}
.modal-overlay.open{display:flex}
.doc{width:100%;max-width:720px;background:var(--paper);color:#1a1a1a;position:relative;
  box-shadow:0 30px 80px rgba(0,0,0,.6);margin-bottom:60px}
.doc-stripe{position:absolute;left:0;top:0;bottom:0;width:34px;background:#0a0a0a;
  display:flex;align-items:center;justify-content:center}
.doc-stripe span{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--display);
  font-weight:900;letter-spacing:3px;font-size:15px;color:var(--red);text-transform:uppercase}
.doc-inner{margin-left:34px;padding:38px 40px 44px}
.doc-close{position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:50%;background:#0a0a0a;
  color:var(--white);border:none;cursor:pointer;font-size:16px;z-index:5}
.doc-close:hover{background:var(--red);color:#0a0a0a}
.doc-disclaimer{background:#1a1a1a;color:#e7b3ba;font-family:var(--mono);font-size:10.5px;line-height:1.6;
  padding:12px 16px;margin-bottom:26px;letter-spacing:.02em}
.doc-disclaimer b{color:var(--red)}
.doc-header{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:2px solid #1a1a1a;padding-bottom:18px;margin-bottom:22px}
.doc-brand{font-family:var(--display);font-weight:900;font-size:22px;text-transform:uppercase}
.doc-brand .d{color:var(--red)} .doc-brand .c{color:#1a1a1a}
.doc-meta{text-align:right;font-family:var(--mono);font-size:10px;color:#555}
.doc-formula-num{font-family:var(--mono);font-size:11px;color:var(--red-dim);letter-spacing:.1em}
.doc-formula-name{font-family:var(--display);font-size:32px;text-transform:uppercase;margin:6px 0 4px;line-height:1}
.doc-formula-subtitle{font-size:14px;color:#555;font-style:italic;margin-bottom:26px}
.doc-pending-note{background:#fff3cd;border:1px solid #e8a33d;color:#7a5a10;font-family:var(--mono);
  font-size:10.5px;padding:8px 12px;margin-bottom:20px;line-height:1.6}
.doc-listen-btn{background:#1a1a1a;color:#fff;border:none;padding:8px 16px;font-family:var(--mono);
  font-size:11px;letter-spacing:.04em;cursor:pointer;border-radius:20px;margin-bottom:18px}
.doc-listen-btn:hover{background:var(--red-dim)}
.doc-section-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--red-dim);margin:22px 0 10px;padding-bottom:6px;border-bottom:1px solid #d8d4c8}
.doc-comp-table{width:100%;border-collapse:collapse;font-size:14px}
.doc-comp-table td{padding:8px 4px;border-bottom:1px solid #d8d4c8}
.doc-comp-table td.qty{text-align:right;font-family:var(--mono);font-weight:700;color:#1a1a1a}
.doc-text{font-size:14px;line-height:1.75;color:#2a2a2a}
.doc-usemode{display:flex;gap:24px;margin-top:6px;flex-wrap:wrap}
.doc-usemode div{flex:1;min-width:180px}
.doc-usemode .k{font-family:var(--mono);font-size:10px;color:#8a8a8a;text-transform:uppercase;letter-spacing:.06em}
.doc-usemode .v{font-size:14px;margin-top:4px}
.doc-footer{margin-top:32px;padding-top:18px;border-top:1px solid #1a1a1a;display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:12px;font-family:var(--mono);font-size:9.5px;color:#777;letter-spacing:.04em}
.doc-footer-actions{display:flex;gap:10px;flex-wrap:wrap}
.doc-print-btn{font-family:var(--mono);font-size:11px;background:#1a1a1a;color:#fff;border:none;
  padding:10px 18px;cursor:pointer;letter-spacing:.06em;text-transform:uppercase}
.doc-print-btn:hover{background:var(--red)}
.doc-whatsapp-btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;
  background:#25D366;color:#08210f;border:none;padding:10px 18px;cursor:pointer;letter-spacing:.03em;
  font-weight:700;border-radius:2px}
.doc-whatsapp-btn:hover{background:#1ebe59}
.doc-whatsapp-note{margin:14px 34px 0;padding:10px 14px;background:#f0ece0;border-left:2px solid #25D366;
  font-family:var(--mono);font-size:10px;line-height:1.6;color:#555}

/* ---------- Glossary search view helper ---------- */
.gloss-search{max-width:420px;margin:0 60px 10px}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  :root{--sidebar-w:0px}
  .sidebar{transform:translateX(-100%);transition:.25s;width:280px;z-index:60}
  .sidebar.open{transform:translateX(0)}
  .main{margin-left:0}
  .hero,.chapter,.layers-section{padding-left:26px;padding-right:26px}
  .stat-row{margin-left:26px;margin-right:26px;grid-template-columns:repeat(2,1fr)}
  #view-formulas{padding-left:26px;padding-right:26px}
  .chapter-nav{margin-left:26px;margin-right:26px}
  .menu-btn{display:flex !important}
  .doc-inner{padding:30px 20px 34px}
  .topbar{padding:10px 14px;gap:8px}
  .topbar-crumb{display:none}
  .progress-track{width:60px}
  .tts-bar{max-width:92vw;padding:8px 14px;gap:10px}
  .tts-bar-label{max-width:120px;font-size:9.5px}
  .doc-footer{flex-direction:column;align-items:flex-start}
  .doc-footer-actions{width:100%}
  .doc-whatsapp-btn,.doc-print-btn{flex:1;justify-content:center}
}
.menu-btn{display:none;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);
  color:var(--white);padding:9px 14px;font-family:var(--mono);font-size:11px;cursor:pointer;border-radius:3px}

/* mobile view switcher (Início/Livro/Fórmulas always reachable, no drawer needed) */
.mobile-viewswitch{display:none;gap:6px;padding:10px 14px;background:var(--panel);border-bottom:1px solid var(--line)}
.mv-btn{flex:1;text-align:center;padding:9px 4px;background:var(--panel2);border:1px solid var(--line);
  color:var(--muted);font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;
  cursor:pointer;border-radius:3px}
.mv-btn.active{background:var(--red);border-color:var(--red);color:#0a0a0a;font-weight:700}
@media (max-width:980px){
  .mobile-viewswitch{display:flex}
}

@media print{
  body > *:not(.modal-overlay){display:none !important}
  .bg-grid,.bg-glow{display:none !important}
  .modal-overlay{position:static !important;inset:auto;background:#fff !important;padding:0 !important;
    display:block !important;backdrop-filter:none !important}
  .doc{box-shadow:none !important;margin:0 auto !important;max-width:100% !important}
  .doc-close,.doc-print-btn{display:none !important}
}

/* =====================================================================
   READING EXPERIENCE: sidebar quick actions, progress, favorites, notes,
   settings panel, glossary tooltips, global search
   ===================================================================== */

.sidebar-quickrow{display:flex;gap:6px;padding:12px 14px;border-bottom:1px solid var(--line-soft)}
.quick-btn{flex:1;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font-family:var(--mono);font-size:10.5px;padding:8px 6px;border-radius:3px;cursor:pointer;letter-spacing:.03em}
.quick-btn:hover{color:var(--white);border-color:var(--red)}
.quick-btn .kbd{opacity:.5;margin-left:3px}

/* home: continue reading + progress */
.btn-outline-progress{background:transparent;border:1px dashed var(--red);color:var(--red);font-weight:600}
.btn-outline-progress:hover{background:rgba(255,31,61,.08)}
.home-progress-wrap{margin:26px 60px 0;max-width:1180px}
.home-progress-label{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.06em;margin-bottom:8px;text-transform:uppercase}
.home-progress-track{height:6px;background:var(--panel2);border:1px solid var(--line);border-radius:3px;overflow:hidden;max-width:400px}
.home-progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--red-deep),var(--red));transition:width .4s}
.storage-warning{margin:20px 60px 0;max-width:900px;padding:12px 18px;border:1px solid var(--amber);
  background:rgba(232,163,61,.08);color:#e8c98d;font-family:var(--mono);font-size:11.5px;line-height:1.6}

/* chapter title row + tools */
.chapter-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  border-bottom:2px solid var(--line);padding-bottom:28px;margin-bottom:42px}
.chapter-title-row .chapter-title{border:none;padding:0;margin:0;flex:1}
.chapter-title-tools{display:flex;align-items:center;gap:10px;flex-shrink:0;padding-top:6px}
.fav-star{font-size:22px;color:#3a3a3a;cursor:pointer;user-select:none;transition:.15s;line-height:1}
.fav-star:hover{color:var(--amber)}
.fav-star.is-fav{color:var(--amber);text-shadow:0 0 12px rgba(232,163,61,.6)}
.tool-btn{background:var(--panel);border:1px solid var(--line);color:var(--muted);font-family:var(--mono);
  font-size:11px;padding:8px 12px;border-radius:3px;cursor:pointer;white-space:nowrap}
.tool-btn:hover{color:var(--white);border-color:var(--red)}

/* notes + complete button */
.chapter-notes{max-width:820px;margin:50px 0 0;padding:20px 22px;background:var(--panel);border:1px solid var(--line)}
.notes-label{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);
  margin-bottom:10px;display:flex;gap:8px;align-items:center}
.notes-status{color:var(--amber);font-size:10px}
.notes-box{width:100%;min-height:90px;background:var(--void);border:1px solid var(--line);color:var(--white);
  font-family:var(--body);font-size:14px;line-height:1.6;padding:12px;border-radius:3px;resize:vertical}
.notes-box:focus{outline:none;border-color:var(--red)}
.complete-btn{display:block;max-width:820px;width:100%;margin:16px 0 0;padding:15px;background:transparent;
  border:1px solid var(--line);color:var(--muted);font-family:var(--mono);font-size:12px;letter-spacing:.06em;
  text-transform:uppercase;cursor:pointer;border-radius:2px}
.complete-btn:hover{border-color:var(--red);color:var(--white)}
.complete-btn.is-done{background:rgba(74,157,143,.12);border-color:#4a9d8f;color:#7fd4c2}

/* collapsible references */
details.refs-collapsible{max-width:820px;margin:36px 0;border:1px solid var(--line);padding:0;background:var(--panel)}
details.refs-collapsible summary{cursor:pointer;padding:14px 20px;font-family:var(--mono);font-size:12px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--red);list-style:none;user-select:none}
details.refs-collapsible summary::-webkit-details-marker{display:none}
details.refs-collapsible summary::before{content:"▸ ";display:inline-block;transition:.15s}
details.refs-collapsible[open] summary::before{content:"▾ "}
details.refs-collapsible > *:not(summary){padding:0 20px}
details.refs-collapsible ul{padding:0 20px 18px}
details.refs-collapsible p:last-child{padding-bottom:18px;font-size:12.5px}

/* glossary tooltip terms */
.gloss-term{color:var(--amber);border-bottom:1px dotted var(--amber);cursor:help}
.gloss-popup{position:absolute;z-index:200;max-width:300px;background:#1a1a1a;border:1px solid var(--amber);
  padding:14px 16px;border-radius:4px;box-shadow:0 10px 30px rgba(0,0,0,.5);font-size:13px;line-height:1.6}
.gloss-popup-term{font-family:var(--mono);color:var(--amber);font-size:11px;text-transform:uppercase;
  letter-spacing:.06em;margin-bottom:6px}
.gloss-popup-def{color:#d8d6d1}

/* settings panel */
.settings-panel{position:fixed;top:70px;left:14px;width:280px;background:#141414;border:1px solid var(--line);
  border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,.6);padding:18px;z-index:80;display:none;
  max-height:80vh;overflow-y:auto}
.settings-panel.open{display:block}
.settings-group{margin-bottom:18px}
.settings-group:last-child{margin-bottom:0}
.settings-label{font-family:var(--mono);font-size:10.5px;color:var(--muted);text-transform:uppercase;
  letter-spacing:.06em;margin-bottom:8px}
.settings-row{display:flex;gap:6px}
.settings-opt{flex:1;padding:8px 4px;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font-family:var(--mono);font-size:11px;cursor:pointer;border-radius:3px}
.settings-opt.active{background:var(--red);border-color:var(--red);color:#0a0a0a;font-weight:700}
.settings-toggle{width:100%;padding:10px;background:var(--panel);border:1px solid var(--line);color:var(--muted);
  font-family:var(--mono);font-size:11px;cursor:pointer;border-radius:3px;text-align:left}
.settings-toggle.active{background:rgba(255,31,61,.12);border-color:var(--red);color:var(--white)}
.voice-select{width:100%;padding:9px 10px;background:var(--panel);border:1px solid var(--line);color:var(--white);
  font-family:var(--body);font-size:12.5px;border-radius:3px}
.settings-hint{font-size:10.5px;color:var(--muted2);margin-top:6px;line-height:1.5}
.settings-checkbox-row{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);cursor:pointer}
.settings-checkbox-row input{accent-color:var(--red);width:15px;height:15px}

/* floating TTS control bar */
.tts-bar{position:fixed;bottom:-70px;left:50%;transform:translateX(-50%);z-index:90;
  display:flex;align-items:center;gap:14px;background:#141414;border:1px solid var(--line);
  border-radius:30px;padding:10px 20px;box-shadow:0 20px 50px rgba(0,0,0,.5);transition:bottom .25s}
.tts-bar.open{bottom:24px}
.tts-bar-btn{width:38px;height:38px;border-radius:50%;background:var(--red);border:none;color:#0a0a0a;
  font-size:15px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.tts-bar-btn:hover{background:#ff3d57}
.tts-bar-btn-sm{width:30px;height:30px;background:var(--panel2);color:var(--white);border:1px solid var(--line);font-size:12px}
.tts-bar-btn-sm:hover{background:#2a2a2a}
#tts-stop-btn{background:var(--panel2);color:var(--white);border:1px solid var(--line)}
#tts-stop-btn:hover{background:#2a2a2a}
.tts-bar-label{font-family:var(--mono);font-size:11px;color:var(--muted);max-width:220px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.tts-selection-btn{position:fixed;bottom:24px;right:24px;z-index:85;background:var(--red);color:#0a0a0a;
  border:none;padding:12px 18px;border-radius:24px;font-family:var(--mono);font-size:12px;font-weight:700;
  cursor:pointer;box-shadow:0 10px 30px rgba(0,0,0,.4);display:none}
.tts-selection-btn.show{display:block}
.tts-selection-btn:hover{background:#ff3d57}

/* paragraph highlight during read-aloud */
.tts-highlight{background:rgba(255,31,61,.1);border-left:2px solid var(--red);padding-left:14px !important;
  margin-left:-16px;border-radius:0 3px 3px 0;transition:background .2s}

/* global search */
.global-search-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);backdrop-filter:blur(3px);z-index:150;
  display:none;align-items:flex-start;justify-content:center;padding:90px 20px}
.global-search-overlay.open{display:flex}
.global-search-box{width:100%;max-width:620px;background:#131313;border:1px solid var(--line);border-radius:6px;
  box-shadow:0 30px 80px rgba(0,0,0,.6);overflow:hidden}
.global-search-input{width:100%;padding:20px 22px;background:transparent;border:none;border-bottom:1px solid var(--line);
  color:var(--white);font-size:16px;font-family:var(--body)}
.global-search-input:focus{outline:none}
.global-search-results{max-height:60vh;overflow-y:auto}
.search-result{padding:14px 22px;border-bottom:1px solid var(--line-soft);cursor:pointer}
.search-result:hover{background:var(--panel2)}
.sr-type{font-family:var(--mono);font-size:9.5px;color:var(--red);text-transform:uppercase;letter-spacing:.08em}
.sr-title{font-family:var(--display);font-size:16px;text-transform:uppercase;margin:3px 0}
.sr-snippet{font-size:12.5px;color:var(--muted)}

/* favorites view */
.fav-section-title{font-family:var(--display);font-size:18px;text-transform:uppercase;color:var(--muted);
  margin:32px 0 14px;letter-spacing:.3px}
.fav-list{display:flex;flex-direction:column;gap:2px}
.fav-item{display:flex;align-items:center;justify-content:space-between;gap:10px;
  background:var(--panel);border:1px solid var(--line-soft)}
.fav-item:hover{border-color:var(--amber)}
.fav-item-body{flex:1;padding:14px 18px;cursor:pointer;display:flex;align-items:center;gap:10px;font-size:14.5px}
.fav-item-star{color:var(--amber)}
.fav-item-remove{background:transparent;border:none;color:var(--muted2);font-size:15px;cursor:pointer;
  padding:14px 16px;line-height:1}
.fav-item-remove:hover{color:var(--red)}

/* font size / spacing / theme variants */
body.font-sm .chapter-body{font-size:14.5px}
body.font-md .chapter-body{font-size:16.5px}
body.font-lg .chapter-body{font-size:18.5px}
body.font-xl .chapter-body{font-size:21px}
body.spacing-tight .chapter-body{line-height:1.55}
body.spacing-normal .chapter-body{line-height:1.85}
body.spacing-loose .chapter-body{line-height:2.25}

body.theme-sepia{--void:#f4ecd8; --panel:#ece2c8; --panel2:#e6dbbe; --panel3:#e0d4b2;
  --line:#d8caa4; --line-soft:#e2d6b4; --white:#3b2f1f; --muted:#6b5c40; --muted2:#8a7a5c}
body.theme-sepia .chapter-body{color:#3f3423}
body.theme-sepia .bg-grid,body.theme-sepia .bg-glow{display:none}
body.theme-sepia .doc{background:#f4ecd8}

body.reading-mode .sidebar{transform:translateX(-100%)}
body.reading-mode .main{margin-left:0}
body.reading-mode .topbar{opacity:.25;transition:opacity .2s}
body.reading-mode .topbar:hover{opacity:1}
body.reading-mode .mobile-viewswitch{display:none !important}
body.reading-mode .chapter-notes,body.reading-mode .complete-btn,body.reading-mode .chapter-title-tools{opacity:.5}
body.reading-mode .chapter-notes:hover,body.reading-mode .complete-btn:hover,body.reading-mode .chapter-title-tools:hover{opacity:1}