/* ──────────────────────────────────────────────
   "Вкусные истории" — Web Reader
   Optimus-light palette, Instrument Serif for body
   ────────────────────────────────────────────── */

:root{
  --bg: #fafaf7;
  --bg-2: #ffffff;
  --bg-soft: #f3f3ef;
  --fg: #0a0a0a;
  --fg-2: #2b2b2b;
  --mute: #6b6b6b;
  --mute-2: #9a9a9a;
  --line: rgba(10,10,10,0.08);
  --line-2: rgba(10,10,10,0.14);
  --ink: #0a0a0a;

  --read-size: 19px;
  --read-leading: 1.65;

  --sans: 'Geist', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --serif: 'Instrument Serif', 'Cormorant Garamond', Georgia, serif;
  --mono: 'Geist Mono', ui-monospace, monospace;
}

/* dark mode (toggle adds .reader--dark to body) */
.reader--dark{
  --bg: #0e0d0a;
  --bg-2: #131210;
  --bg-soft: #1a1916;
  --fg: #ebe7df;
  --fg-2: #cfcabd;
  --mute: #8a8578;
  --mute-2: #5e594d;
  --line: rgba(235,231,223,0.10);
  --line-2: rgba(235,231,223,0.18);
  --ink: #ebe7df;
}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body.reader{
  background:var(--bg);
  color:var(--fg);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
  transition:background .3s ease, color .3s ease;
}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
em{font-family:var(--serif);font-style:italic;font-weight:400}

.mono{font-family:var(--mono);font-size:.78em;letter-spacing:.06em;text-transform:uppercase}

/* ──────────────────────────────────────────────
   TOP BAR
   ────────────────────────────────────────────── */
.reader__topbar{
  position:sticky;top:0;z-index:30;
  display:flex;align-items:center;gap:14px;
  padding:14px 24px;
  border-bottom:1px solid var(--line);
  background:rgba(250,250,247,.82);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.reader--dark .reader__topbar{background:rgba(14,13,10,.82)}

.reader__brand{display:inline-flex;align-items:center;gap:10px}
.reader__brand-mark{
  width:30px;height:30px;border-radius:8px;
  background:var(--ink);color:var(--bg);
  display:grid;place-items:center;
}
.reader__brand-mark svg{width:18px;height:18px}
.reader__brand-name{font-weight:600;font-size:15px}
.reader__brand-name sup{font-size:9px;font-weight:400;color:var(--mute)}
.reader__brand-sub{color:var(--mute)}

.reader__toc-toggle{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);
  font-size:13px;color:var(--fg-2);
  transition:background .25s,border-color .25s;
}
.reader__toc-toggle:hover{background:var(--bg-soft);border-color:var(--line-2)}

.reader__topbar-right{margin-left:auto;display:flex;align-items:center;gap:6px}

.reader__btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);
  background:var(--bg-2);color:var(--fg);
  font-size:13px;
  transition:background .25s, border-color .25s, transform .25s;
}
.reader--dark .reader__btn{background:var(--bg-2)}
.reader__btn:hover{background:var(--bg-soft);border-color:var(--line-2);transform:translateY(-1px)}
.reader__btn--primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.reader__btn--primary:hover{background:var(--fg);color:var(--bg)}
.reader__btn--lg{padding:11px 18px;font-size:14px}

/* ──────────────────────────────────────────────
   PROGRESS BAR
   ────────────────────────────────────────────── */
.reader__progress{
  position:sticky;top:60px;z-index:29;
  height:1px;background:var(--line);
}
.reader__progress-bar{
  height:1px;width:0%;
  background:var(--ink);
  transition:width .35s ease;
}

/* ──────────────────────────────────────────────
   LAYOUT
   ────────────────────────────────────────────── */
.reader__layout{
  display:grid;grid-template-columns:280px 1fr;
  min-height:calc(100vh - 80px);
}
@media (max-width:980px){
  .reader__layout{grid-template-columns:1fr}
}

/* ──────────────────────────────────────────────
   TOC SIDEBAR
   ────────────────────────────────────────────── */
.reader__toc{
  position:sticky;top:81px;
  height:calc(100vh - 81px);
  overflow-y:auto;
  border-right:1px solid var(--line);
  padding:24px;
  background:var(--bg-2);
}
.reader__toc-head{margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.reader__toc-title{
  font-family:var(--serif);font-style:italic;font-weight:400;
  font-size:24px;letter-spacing:-.02em;line-height:1;
  margin:0 0 6px;color:var(--ink);
}
.reader__toc-sub{color:var(--mute);font-size:10.5px}

.reader__toc-list{
  list-style:none;padding:0;margin:0;
  display:flex;flex-direction:column;gap:1px;
}
.reader__toc-item{
  display:flex;align-items:baseline;gap:10px;
  padding:8px 8px;
  border-radius:6px;
  cursor:pointer;
  transition:background .2s, color .2s;
  font-size:13.5px;line-height:1.35;color:var(--fg-2);
}
.reader__toc-item:hover{background:var(--bg-soft);color:var(--ink)}
.reader__toc-item.is-active{
  background:var(--ink);color:var(--bg);
  font-weight:500;
}
.reader__toc-item.is-active .reader__toc-no{color:var(--bg);opacity:.7}
.reader__toc-no{
  flex-shrink:0;
  font-family:var(--mono);font-size:10px;
  color:var(--mute);letter-spacing:.06em;
  min-width:24px;text-align:right;
}
.reader__toc-name{flex:1}

.reader__toc-foot{margin-top:24px;padding-top:18px;border-top:1px solid var(--line)}
.reader__toc-back{color:var(--mute);font-size:13px}
.reader__toc-back:hover{color:var(--ink)}

@media (max-width:980px){
  .reader__toc{
    position:fixed;top:0;left:0;
    width:min(320px, 88vw);height:100vh;
    transform:translateX(-100%);
    transition:transform .35s cubic-bezier(.22,.61,.36,1);
    z-index:50;
    box-shadow:0 0 0 9999px rgba(0,0,0,0);
  }
  .reader__toc.is-open{transform:translateX(0)}
}

.reader__overlay{
  position:fixed;inset:0;
  background:rgba(0,0,0,0.4);
  opacity:0;pointer-events:none;
  transition:opacity .35s;
  z-index:40;
}
.reader__overlay.is-open{opacity:1;pointer-events:auto}

/* ──────────────────────────────────────────────
   MAIN — COVER & CHAPTER
   ────────────────────────────────────────────── */
.reader__main{
  max-width:760px;
  margin:0 auto;
  padding:64px 32px 96px;
  width:100%;
}
@media (max-width:680px){.reader__main{padding:40px 22px 64px}}

/* COVER */
.reader__cover{
  text-align:center;
  padding:60px 0 80px;
}
.reader__cover-eyebrow{color:var(--mute);margin-bottom:24px;font-size:11px}
.reader__cover-title{
  font-family:var(--sans);font-weight:500;
  font-size:clamp(54px, 9vw, 120px);
  line-height:.95;letter-spacing:-.045em;
  margin:0 0 28px;color:var(--ink);
}
.reader__cover-title em{font-weight:400;letter-spacing:-.025em}
.reader__cover-sub{
  font-family:var(--serif);font-style:italic;font-size:22px;
  color:var(--mute);margin:0 0 32px;
  line-height:1.4;
}
.reader__cover-author{
  font-size:15px;color:var(--fg);margin:0 0 36px;
  letter-spacing:.02em;
}
.reader__cover-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.reader__cover-note{color:var(--mute);font-size:10.5px}

/* CHAPTER */
.reader__chapter{padding:40px 0}
.reader__chapter-no{
  display:inline-block;
  color:var(--mute);font-size:11px;
  margin-bottom:14px;letter-spacing:.1em;
}
.reader__chapter-title{
  font-family:var(--sans);font-weight:500;
  font-size:clamp(34px, 5.4vw, 56px);
  line-height:1.04;letter-spacing:-.035em;
  margin:0 0 36px;color:var(--ink);
}
.reader__chapter-body{
  font-family:var(--serif);
  font-size:var(--read-size);line-height:var(--read-leading);
  color:var(--fg-2);
}
.reader__chapter-body p{
  margin:0 0 1.1em;
}
.reader__chapter-body p:first-of-type::first-letter{
  font-size:3.4em;float:left;line-height:.9;
  padding:.08em .12em 0 0;
  color:var(--ink);
  font-style:italic;
}
.reader__chapter-body p.dialogue{font-style:italic;color:var(--fg-2);padding-left:1.2em;border-left:2px solid var(--line);}

.reader__nav{
  margin-top:64px;padding-top:32px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  flex-wrap:wrap;
}
.reader__nav-counter{color:var(--mute);font-size:11px}
.reader__nav .reader__btn[disabled]{
  opacity:.3;pointer-events:none;
}

.reader__footer{
  margin-top:80px;padding-top:24px;
  border-top:1px solid var(--line);
  display:flex;justify-content:space-between;
  color:var(--mute);font-size:10.5px;letter-spacing:.06em;
  flex-wrap:wrap;gap:8px;
}
.reader__footer-back{color:var(--mute)}
.reader__footer-back:hover{color:var(--ink)}

/* font-size controls add classes */
body.reader.fs-sm{--read-size:17px}
body.reader.fs-md{--read-size:19px}
body.reader.fs-lg{--read-size:22px}
body.reader.fs-xl{--read-size:25px}

/* loading state */
.reader__loading{
  padding:48px;text-align:center;color:var(--mute);
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
}