:root{
  --ink:#0c0c11;
  --ink-deep:#050506;
  --paper:#f4f1e9;
  --paper-dim:#9a97a6;
  --cyan:#1f9c82;
  --magenta:#ef6f61;
  --gold:#f2cf5c;
  --line:#2a2a38;
}

body.theme-dark{
  --reader-bg:#050506;
  --reader-bg-elevated:#0c0c11;
  --reader-text:#f4f1e9;
  --reader-text-dim:#9a97a6;
  --reader-line:#2a2a38;
  --reader-overlay:rgba(5,5,6,.94);
}
body.theme-light{
  --reader-bg:#f4f1e9;
  --reader-bg-elevated:#ffffff;
  --reader-text:#141414;
  --reader-text-dim:#5c5a63;
  --reader-line:#dcd8cd;
  --reader-overlay:rgba(244,241,233,.94);
}
body.theme-true-black{
  --reader-bg:#000000;
  --reader-bg-elevated:#0a0a0a;
  --reader-text:#f4f1e9;
  --reader-text-dim:#8a8790;
  --reader-line:#1c1c1c;
  --reader-overlay:rgba(0,0,0,.96);
}

*{box-sizing:border-box;}

html,body{
  margin:0;
  padding:0;
  height:100%;
  background:var(--reader-bg);
  color:var(--reader-text);
  font-family:'Space Grotesk',sans-serif;
  overflow:hidden;
  overscroll-behavior:none;
  transition:background .2s ease, color .2s ease;
}

.grain{
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:.045;
  mix-blend-mode:overlay;
  z-index:1;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
body.theme-light .grain{opacity:.03;}

.reader-error{
  height:100vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  text-align:center;
  background:var(--ink-deep);
  color:var(--paper);
}
.reader-error a{
  color:var(--cyan);
  text-decoration:none;
  font-family:'JetBrains Mono',monospace;
  font-size:13px;
  border:1px solid var(--line);
  padding:8px 16px;
  border-radius:6px;
  transition:border-color .2s ease, background .2s ease;
}
.reader-error a:hover{
  border-color:var(--cyan);
  background:rgba(31,156,130,.08);
}

.reader{
  position:relative;
  z-index:2;
  display:flex;
  flex-direction:column;
  height:100dvh;
}

.reader-topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 12px;
  background:var(--reader-overlay);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--reader-line);
  z-index:5;
  flex-shrink:0;
}

.reader-topbar__actions{
  display:flex;
  align-items:center;
  gap:2px;
}

.reader-icon-btn{
  display:flex;
  align-items:center;
  justify-content:center;
  width:38px;
  height:38px;
  border-radius:8px;
  background:transparent;
  border:none;
  color:var(--reader-text);
  text-decoration:none;
  cursor:pointer;
  transition:background .15s ease, color .15s ease, transform .15s ease;
}
.reader-icon-btn:hover{
  background:rgba(128,128,128,.14);
  color:var(--cyan);
}
.reader-icon-btn:active{
  transform:scale(.9);
}

.reader-title{
  display:flex;
  flex-direction:column;
  align-items:center;
  line-height:1.25;
  flex:1;
  min-width:0;
  padding:0 6px;
}
.reader-title__code{
  font-weight:700;
  font-size:14px;
  letter-spacing:.02em;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  max-width:100%;
}
.reader-title__lang{
  font-family:'JetBrains Mono',monospace;
  font-size:10px;
  color:var(--reader-text-dim);
  letter-spacing:.03em;
}

.reader-stage{
  position:relative;
  flex:1;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  min-height:0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(31,156,130,.07), transparent 65%),
    var(--reader-bg);
  padding:10px;
}

.reader-spread{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:center;
  height:100%;
  width:100%;
  max-width:1400px;
  margin:0 auto;
  animation:book-flip-in .5s cubic-bezier(.2,.7,.3,1) backwards;
  perspective:1800px;
}

@keyframes book-flip-in{
  from{opacity:0;transform:rotateY(-10deg) scale(.97);}
  to{opacity:1;transform:rotateY(0deg) scale(1);}
}

.reader-page{
  position:relative;
  flex:1 1 0;
  min-width:0;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:auto;
}

.reader-page--left{justify-content:flex-end;}
.reader-page--right{justify-content:flex-start;}

.reader-image{
  max-width:100%;
  max-height:100%;
  width:auto;
  height:auto;
  object-fit:contain;
  user-select:none;
  -webkit-user-drag:none;
  border-radius:2px;
  box-shadow:0 18px 40px -14px rgba(0,0,0,.45);
}
body.theme-light .reader-image{
  box-shadow:0 12px 30px -12px rgba(0,0,0,.2);
}

.reader-spine{
  width:2px;
  align-self:stretch;
  margin:14px 0;
  background:linear-gradient(180deg, transparent, rgba(0,0,0,.4) 15%, rgba(0,0,0,.4) 85%, transparent);
  flex-shrink:0;
}

.reader-tap{
  position:absolute;
  top:0;
  bottom:0;
  width:30%;
  cursor:pointer;
  z-index:3;
}
.reader-tap--left{left:0;}
.reader-tap--right{right:0;}

.reader-nav-arrow{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  width:48px;
  height:48px;
  border-radius:50%;
  background:var(--reader-overlay);
  border:1px solid var(--reader-line);
  color:var(--reader-text);
  display:none;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  opacity:0;
  transition:opacity .18s ease, background .18s ease, border-color .18s ease, transform .15s ease;
  z-index:4;
}
.reader-nav-arrow--left{left:16px;}
.reader-nav-arrow--right{right:16px;}

.is-desktop .reader-nav-arrow{display:flex;}
.is-desktop .reader-stage:hover .reader-nav-arrow{opacity:1;}
.reader-nav-arrow:hover{background:rgba(31,156,130,.2);border-color:var(--cyan);color:var(--cyan);}
.reader-nav-arrow:active{transform:translateY(-50%) scale(.9);}

.reader-bottombar{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  padding:12px 14px;
  background:var(--reader-overlay);
  backdrop-filter:blur(6px);
  border-top:1px solid var(--reader-line);
  flex-shrink:0;
  padding-bottom:calc(12px + env(safe-area-inset-bottom));
}

.reader-page-btn{
  width:44px;
  height:44px;
  border-radius:10px;
  background:rgba(128,128,128,.08);
  border:1px solid var(--reader-line);
  color:var(--reader-text);
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:background .15s ease, border-color .15s ease, transform .15s ease, color .15s ease;
}
.reader-page-btn:hover:not(:disabled){
  border-color:var(--cyan);
  background:rgba(31,156,130,.1);
  color:var(--cyan);
}
.reader-page-btn:active:not(:disabled){
  transform:scale(.92);
}
.reader-page-btn:disabled{
  opacity:.3;
  cursor:default;
}

.reader-page-count{
  font-family:'JetBrains Mono',monospace;
  font-size:13px;
  color:var(--reader-text);
  background:rgba(128,128,128,.08);
  border:1px solid var(--reader-line);
  border-radius:10px;
  padding:0 18px;
  height:44px;
  min-width:96px;
  cursor:pointer;
  transition:border-color .15s ease, color .15s ease;
}
.reader-page-count:hover{
  border-color:var(--cyan);
  color:var(--cyan);
}

.reader-panel{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.55);
  z-index:10;
  display:flex;
  justify-content:flex-end;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease;
}
.reader-panel--open{
  opacity:1;
  pointer-events:auto;
}

.reader-panel__inner{
  width:82%;
  max-width:340px;
  height:100%;
  background:var(--reader-bg-elevated);
  border-left:1px solid var(--reader-line);
  display:flex;
  flex-direction:column;
  transform:translateX(100%);
  transition:transform .25s ease;
}
.reader-panel--open .reader-panel__inner{
  transform:translateX(0);
}

.reader-panel__header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:16px;
  border-bottom:1px solid var(--reader-line);
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;
  font-size:15px;
  color:var(--reader-text);
}
.reader-panel__close{
  background:none;
  border:none;
  color:var(--reader-text);
  font-size:22px;
  line-height:1;
  cursor:pointer;
  width:32px;
  height:32px;
  border-radius:8px;
  transition:background .15s ease;
}
.reader-panel__close:hover{
  background:rgba(128,128,128,.14);
}

.reader-panel__quicknav{
  display:flex;
  gap:8px;
  padding:12px 16px;
  border-bottom:1px solid var(--reader-line);
}
.reader-panel__quickbtn{
  flex:1;
  text-align:center;
  padding:10px 8px;
  border:1px solid var(--reader-line);
  border-radius:8px;
  color:var(--cyan);
  text-decoration:none;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:.03em;
  transition:border-color .15s ease, background .15s ease, transform .15s ease;
}
.reader-panel__quickbtn:hover{
  border-color:var(--cyan);
  background:rgba(31,156,130,.08);
}
.reader-panel__quickbtn:active{
  transform:scale(.96);
}
.reader-panel__quickbtn--disabled{
  color:var(--reader-text-dim);
  pointer-events:none;
  opacity:.4;
}

.reader-panel__list{
  overflow-y:auto;
  padding:10px;
  flex:1;
}

.reader-panel__item{
  display:block;
  padding:13px 14px;
  color:var(--reader-text);
  text-decoration:none;
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  letter-spacing:.03em;
  border-radius:8px;
  margin-bottom:4px;
  transition:background .15s ease, transform .15s ease;
  animation:panel-item-in .3s ease backwards;
}
.reader-panel__item:hover{
  background:rgba(128,128,128,.1);
}
.reader-panel__item:active{
  transform:scale(.97);
}
.reader-panel__item--active{
  background:rgba(31,156,130,.14);
  color:var(--cyan);
}

.reader-panel__pagegrid{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:8px;
  padding:14px;
  overflow-y:auto;
}

.reader-panel__pagebtn{
  display:flex;
  align-items:center;
  justify-content:center;
  aspect-ratio:1;
  border:1px solid var(--reader-line);
  border-radius:8px;
  color:var(--reader-text);
  text-decoration:none;
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  transition:background .15s ease, border-color .15s ease, transform .15s ease;
  animation:panel-item-in .3s ease backwards;
}
.reader-panel__pagebtn:hover{
  border-color:var(--cyan);
  background:rgba(31,156,130,.1);
}
.reader-panel__pagebtn:active{
  transform:scale(.94);
}
.reader-panel__pagebtn--active{
  background:var(--cyan);
  color:var(--ink-deep);
  border-color:var(--cyan);
  font-weight:700;
}

@keyframes panel-item-in{
  from{opacity:0;transform:translateY(6px);}
  to{opacity:1;transform:translateY(0);}
}

.reader-settings__body{
  padding:8px 16px 20px;
  overflow-y:auto;
  flex:1;
}

.reader-settings__group{
  padding:16px 0;
  border-bottom:1px solid var(--reader-line);
}
.reader-settings__group:last-child{
  border-bottom:none;
}

.reader-settings__label{
  display:block;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--reader-text-dim);
  margin-bottom:10px;
}

.reader-settings__options{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}

.reader-settings__opt{
  display:flex;
  align-items:center;
  gap:7px;
  padding:9px 13px;
  border:1px solid var(--reader-line);
  border-radius:999px;
  background:rgba(128,128,128,.06);
  color:var(--reader-text);
  font-family:'Space Grotesk',sans-serif;
  font-size:12.5px;
  font-weight:500;
  cursor:pointer;
  transition:border-color .15s ease, background .15s ease, transform .15s ease, color .15s ease;
}
.reader-settings__opt:hover{
  border-color:var(--cyan);
}
.reader-settings__opt:active{
  transform:scale(.95);
}
.reader-settings__opt--active{
  background:var(--cyan);
  border-color:var(--cyan);
  color:var(--ink-deep);
}
.reader-settings__opt--active .reader-settings__opt-icon{
  color:var(--ink-deep);
}

.reader-settings__opt-icon{
  display:flex;
  color:var(--reader-text-dim);
}
.reader-settings__opt--active .reader-settings__opt-icon{
  color:var(--ink-deep);
}

.reader-settings__swatch{
  width:16px;
  height:16px;
  border-radius:50%;
  border:1px solid rgba(128,128,128,.4);
  flex-shrink:0;
}
.reader-settings__swatch--dark{background:#0c0c11;}
.reader-settings__swatch--light{background:#f4f1e9;}
.reader-settings__swatch--true-black{background:#000000;}

.reader-instructions{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease;
}
.reader-instructions--open{
  opacity:1;
  pointer-events:auto;
}

.reader-instructions__card{
  width:100%;
  max-width:360px;
  background:var(--reader-bg-elevated);
  border:1px solid var(--reader-line);
  border-radius:14px;
  overflow:hidden;
  transform:scale(.95);
  transition:transform .2s ease;
}
.reader-instructions--open .reader-instructions__card{
  transform:scale(1);
}

.reader-instructions__body{
  padding:16px;
  display:flex;
  flex-direction:column;
  gap:14px;
}

.reader-instructions__row{
  display:flex;
  align-items:flex-start;
  gap:12px;
  font-size:13px;
  line-height:1.5;
  color:var(--reader-text-dim);
}
.reader-instructions__icon{
  font-size:18px;
  flex-shrink:0;
}

body.is-desktop .reader-instructions__row--touch{display:none;}
body.is-touch .reader-instructions__row--mouse{display:none;}
body.is-touch .reader-instructions__row--keys{display:none;}

.reader-instructions__dismiss{
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 16px 16px;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--reader-text-dim);
  cursor:pointer;
}

.reader-instructions__gotit{
  display:block;
  width:calc(100% - 32px);
  margin:0 16px 16px;
  padding:12px;
  background:var(--cyan);
  color:var(--ink-deep);
  border:none;
  border-radius:8px;
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;
  font-size:14px;
  cursor:pointer;
  transition:background .15s ease, transform .15s ease;
}
.reader-instructions__gotit:hover{
  background:#2fc0a1;
}
.reader-instructions__gotit:active{
  transform:scale(.97);
}

.reader-spine{display:none;}

body.view-split .reader-spine{display:block;}
body.view-split .reader-page--right{display:flex;}

body.view-single .reader-spine{display:none;}
body.view-single .reader-page--right{display:none;}
body.view-single .reader-page--left{justify-content:center;}

@media (min-width:900px){
  body.view-auto .reader-spine{display:block;}
  body.view-auto .reader-page--right{display:flex;}
  body.fit-contain .reader-image{max-height:88vh;}
}

@media (max-width:899px){
  body.view-auto .reader-page--right{display:none;}
  body.view-auto .reader-page--left{justify-content:center;}
  body.fit-contain .reader-image{max-height:calc(100dvh - 130px);}
}

body.fit-width .reader-image{
  width:100%;
  max-width:100%;
  height:auto;
  max-height:none;
}
body.fit-width .reader-page{
  overflow-y:auto;
  align-items:flex-start;
}

@media (prefers-reduced-motion:reduce){
  .reader-spread{animation:none;}
  .reader-panel__item,.reader-panel__pagebtn{animation:none;}
}