:root{
  /* Základ */
  --bg: #0c0f14;
  --paper: rgba(255,255,255,0.92);
  --text: #14171c;
  --muted: #5d6672;
  --line: rgba(20,23,28,0.12);

  /* Akcenty */
  --accent: #2c77ff;      /* modrá */
  --accent2: #13c2c2;     /* tyrkys */
  --link: #2c77ff;
  --linkHover: #1d59c8;

  /* Typografie / layout */
  --radius: 18px;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --maxw: 980px;          /* širší plocha pro text */
}

*{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  color: var(--text);
  font-family: ui-serif, Georgia, "Times New Roman", Times, serif;
  font-size: 18px;
  line-height: 1.75;

  /* Jemně barevnější pozadí (noc + nádech modré/tyrkys) */
  background:
    radial-gradient(1200px 800px at 18% 0%, rgba(44,119,255,0.22), transparent 55%),
    radial-gradient(1000px 700px at 82% 18%, rgba(19,194,194,0.18), transparent 60%),
    radial-gradient(900px 700px at 50% 110%, rgba(255,109,0,0.10), transparent 60%),
    var(--bg);
}

a{ color: var(--link); text-decoration: none; }
a:hover{ color: var(--linkHover); text-decoration: underline; }

.wrapper{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 34px 18px 72px;
}

.paper{
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 34px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

/* Duhová „nit“ nahoře (decentní) */
.paper::before{
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 12px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg,
    rgba(44,119,255,0.85),
    rgba(19,194,194,0.85),
    rgba(168,255,96,0.65),
    rgba(255,200,0,0.65),
    rgba(255,109,0,0.65),
    rgba(255,70,160,0.65)
  );
  opacity: .55;
}

header.site{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.site-title{
  font-size: 22px;
  letter-spacing: .2px;
  margin: 0;
}

.site-title a{
  color: #f2f4f7; /* v hlavičce na tmavém pozadí */
  text-decoration: none;
}

.site-meta{
  color: rgba(242,244,247,0.75);
  font-size: 14px;
  white-space: nowrap;
}

main.paper h1{
  font-size: 38px;
  line-height: 1.18;
  margin: 6px 0 12px;
  letter-spacing: .2px;
}

.subtitle{
  margin: 0 0 18px;
  color: var(--muted);
  font-style: italic;
}

hr{
  border: none;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}

/* Text */
.prose p{
  margin: 0 0 16px;
}

/* Navigace kapitol */
.nav{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 16px;
}

.nav a{
  display: inline-block;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 10px 24px rgba(0,0,0,.08);
}

.nav a:hover{
  text-decoration: none;
  border-color: rgba(44,119,255,0.35);
  box-shadow: 0 14px 30px rgba(44,119,255,.12);
}

.nav a[aria-disabled="true"]{
  opacity: .45;
  pointer-events: none;
}

/* Seznam kapitol na indexu */
.chapter-list{
  list-style: none;
  padding: 0;
  margin: 0;
}

.chapter-list li{
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.chapter-list li:first-child{
  border-top: none;
}

.chapter-list .title{
  display: inline-block;
  font-size: 18px;
  padding: 6px 10px;
  border-radius: 12px;
  background: rgba(44,119,255,0.08);
  border: 1px solid rgba(44,119,255,0.12);
}

.chapter-list .title:hover{
  background: rgba(44,119,255,0.13);
  border-color: rgba(44,119,255,0.22);
  text-decoration: none;
}

.chapter-list .date{
  display: block;
  color: var(--muted);
  font-size: 14px;
  margin-top: 6px;
}

.footer{
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

/* Mobile jemné úpravy */
@media (max-width: 560px){
  main.paper h1{ font-size: 32px; }
  .paper{ padding: 28px 18px; }
  .site-title{ font-size: 20px; }
}


.chapter-figure{
  margin: 18px 0 26px;
}

.chapter-figure.is-book{
  max-width: 680px;     /* knižní šířka */
  margin-left: auto;
  margin-right: auto;
}

.chapter-figure img{
  display: block;
  width: 100%;
  height: 360px;        /* důležité: limit výšky */
  object-fit: cover;    /* ořez, aby to nevypadalo roztaženě */
  object-position: center 35%;
  border-radius: 16px;
  border: 1px solid rgba(20,23,28,0.12);
  box-shadow: 0 14px 30px rgba(0,0,0,.12);
  background: rgba(255,255,255,0.6);
}

.chapter-figure figcaption{
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  font-style: italic;
  text-align: center;
}

/* mobil: ještě menší výška */
@media (max-width: 560px){
  .chapter-figure img{
    height: 240px;
  }
}


.chapter-figure.is-intro{
  max-width: 560px;          /* menší než kapitola */
  margin: 14px auto 20px;
}

.chapter-figure.is-intro img{
  height: 260px;             /* nízký, klidný */
  object-fit: cover;
  object-position: center 55%;
  opacity: 0.96;             /* jemné ztišení */
}

.chapter-figure.is-intro figcaption{
  font-size: 13px;
  opacity: 0.85;
}
@media (max-width: 560px){
  .chapter-figure.is-intro img{
    height: 180px;
  }
}