:root{
  --bg:#ffffff;
  --bg-soft:#f5f5f7;
  --ink:#1d1d1f;
  --ink-soft:#6e6e73;
  --accent:#0071e3;
  --accent-dark:#0058b0;
  --hairline:rgba(0,0,0,.07);
  --radius:20px;
  --shadow-hover:0 30px 60px rgba(0,0,0,.12);
}
*{box-sizing:border-box; -webkit-font-smoothing:antialiased;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.5;
  letter-spacing:-.01em;
}
a{color:var(--accent); text-decoration:none;}
img{max-width:100%;display:block;}
h1,h2,h3{font-weight:600; letter-spacing:-.02em;}

/* Header - translucent blur, Apple style */
header.site-header{
  position:sticky; top:0; z-index:100;
  border-bottom:1px solid var(--hairline);
}
header.site-header::before{
  content:"";
  position:absolute; inset:0;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  z-index:-1;
}
.header-inner{
  max-width:1120px; margin:0 auto; padding:0 1.5rem;
  height:48px;
  display:flex; align-items:center; justify-content:space-between; gap:1rem;
}
.brand{display:inline-flex; align-items:center; gap:.45rem; font-weight:600; font-size:1rem; color:var(--ink); letter-spacing:-.01em;}
.brand-logo{height:18px; width:auto; display:block; flex:none;}
nav.main-nav{display:flex; gap:2rem; align-items:center;}
nav.main-nav a{color:var(--ink); font-size:.8rem; font-weight:400; opacity:.85;}
nav.main-nav a:hover{opacity:1;}
nav.main-nav a.current{opacity:1; font-weight:600;}
.menu-toggle{
  display:none; background:none; border:none; color:var(--ink); font-size:1.3rem; cursor:pointer;
  width:32px; height:32px;
}

/* Hero - big Apple-style headline over blurred background photo */
.hero{
  position:relative;
  background:linear-gradient(135deg,#ff8a3d 0%,#ff4d8d 35%,#a855f7 68%,#3b82f6 100%);
  color:#fff;
  padding:5rem 1.5rem 4rem;
  text-align:center;
  overflow:hidden;
  isolation:isolate;
}
.hero.hero-compact{padding:3.25rem 1.5rem 2.75rem;}
.hero::before{
  content:"";
  position:absolute; inset:-8%;
  background-image: url('https://wizjadlaciebie.pl/assets/images/ksiazkaaa-1-492x238.png');
  background-size:cover;
  background-position:center;
  filter:blur(14px) saturate(.9) brightness(.78) contrast(1.05);
  transform:scale(1.15);
  z-index:-2;
}
.hero::after{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(ellipse at center, rgba(0,0,0,.04) 0%, rgba(0,0,0,.34) 78%),
    linear-gradient(180deg, rgba(0,0,0,.22) 0%, rgba(0,0,0,.08) 35%, rgba(0,0,0,.4) 100%);
  z-index:-1;
}
.hero-inner{max-width:760px; margin:0 auto; position:relative;}
.hero .eyebrow{
  font-size:.9rem; color:#f2f2f3; font-weight:600; letter-spacing:.02em; margin-bottom:.9rem;
  text-shadow:0 1px 3px rgba(0,0,0,.55), 0 1px 14px rgba(0,0,0,.6);
}
.hero h1{
  font-size:clamp(2.4rem, 6vw, 4rem); margin:0 0 1.1rem; color:#fff; line-height:1.05;
  text-shadow:0 1px 4px rgba(0,0,0,.55), 0 2px 24px rgba(0,0,0,.6);
}
.hero p{
  font-size:1.15rem; color:#f4f4f5; margin:0 auto; max-width:620px; font-weight:400;
  line-height:1.5; text-shadow:0 1px 3px rgba(0,0,0,.55), 0 1px 16px rgba(0,0,0,.6);
}

/* Toolbar: search + segmented pills */
.toolbar{
  position:sticky; top:48px; z-index:90;
  max-width:1120px; margin:0 auto; padding:1.75rem 1.5rem 1rem;
}
.toolbar::before{
  content:"";
  position:absolute; inset:0 calc(-50vw + 50%);
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--hairline);
  z-index:-1;
}
#search-input{
  display:block; width:100%; max-width:420px; margin:0 auto 1.6rem;
  padding:.7rem 1.1rem; border:none; background:var(--bg-soft);
  border-radius:980px; font-size:.95rem; text-align:center; color:var(--ink);
}
#search-input:focus{outline:2px solid var(--accent); outline-offset:2px;}
#search-input::placeholder{color:var(--ink-soft);}

.filters{
  display:flex; align-items:center; gap:.15rem;
  width:100%; max-width:max-content; margin:0 auto;
  background:var(--bg-soft); padding:.3rem; border-radius:980px;
  overflow-x:auto; -webkit-overflow-scrolling:touch; scrollbar-width:none;
}
.filters::-webkit-scrollbar{display:none;}

.filters-mobile{display:none;}

@media (max-width:640px){
  .filters{display:none;}
  .filters-mobile{
    display:block; position:relative; max-width:420px; margin:0 auto;
  }
  .filters-mobile select{
    appearance:none; -webkit-appearance:none; -moz-appearance:none;
    width:100%; font:inherit; font-size:.95rem; font-weight:500; color:var(--ink);
    background:var(--bg-soft); border:none; border-radius:980px;
    padding:.75rem 2.6rem .75rem 1.3rem; text-align:center;
  }
  .filters-mobile::after{
    content:""; position:absolute; right:1.25rem; top:50%; width:8px; height:8px;
    border-right:2px solid var(--ink-soft); border-bottom:2px solid var(--ink-soft);
    transform:translateY(-65%) rotate(45deg); pointer-events:none;
  }
}
.filter-pill{
  font:inherit; font-size:.85rem; padding:.55rem 1.15rem; border-radius:980px;
  background:transparent; color:var(--ink); border:none; cursor:pointer;
  white-space:nowrap; flex:none;
  transition:background .2s ease, color .2s ease;
}
.filter-pill:hover{background:rgba(0,0,0,.05);}
.filter-pill.active{background:var(--ink); color:#fff;}
.filter-pill.active:hover{background:var(--ink);}
.filter-pill .count{opacity:.55; font-size:.85em;}

main{max-width:1120px; margin:0 auto; padding:1rem 1.5rem 1rem;}

.cat-section{margin:5rem 0; scroll-margin-top:4.5rem;}
.cat-header{margin-bottom:1.8rem; text-align:center;}
.cat-header h2{margin:0 0 .4rem; font-size:clamp(1.6rem,3vw,2.1rem); color:var(--ink);}
.cat-sub{margin:0 auto; color:var(--ink-soft); font-size:1rem; max-width:520px;}

.card-grid{
  display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:1.4rem;
}
.card{
  background:var(--bg-soft); border-radius:var(--radius);
  overflow:hidden; display:flex; flex-direction:column;
  transition:transform .3s cubic-bezier(.2,.8,.2,1), box-shadow .3s ease;
}
.card:hover{transform:translateY(-4px); box-shadow:var(--shadow-hover);}
.card-thumb{display:block; aspect-ratio:492/328; overflow:hidden; background:#e5e5e5;}
.card-thumb img{width:100%; height:100%; object-fit:cover; transition:transform .5s ease;}
.card:hover .card-thumb img{transform:scale(1.04);}
.card-body{padding:1.2rem 1.3rem 1.4rem; display:flex; flex-direction:column; gap:.5rem; flex:1;}
.card-body h3{margin:0; font-size:1.02rem; color:var(--ink); line-height:1.3;}
.card-body p{margin:0; font-size:.88rem; color:var(--ink-soft); flex:1;}
.btn-download{
  align-self:flex-start; margin-top:.4rem; font-size:.9rem; font-weight:500;
  color:var(--accent); display:inline-flex; align-items:center; gap:.15rem;
}
.btn-download .chev{transition:transform .15s ease;}
.btn-download:hover .chev{transform:translateX(3px);}

/* Books section */
.books{background:var(--bg-soft); padding:5rem 1.5rem; margin-top:2rem;}
.books-inner{max-width:1120px; margin:0 auto;}
.books h2{text-align:center; font-size:clamp(1.6rem,3vw,2.1rem); color:var(--ink); margin-bottom:.4rem;}
.books .lead{text-align:center; color:var(--ink-soft); margin-bottom:2.6rem; font-size:1rem;}
.book-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:1.6rem;}
.book-card{
  display:flex; gap:1.2rem; background:#fff; border-radius:var(--radius); padding:1.3rem;
  transition:box-shadow .3s ease, transform .3s ease;
}
.book-card:hover{box-shadow:var(--shadow-hover); transform:translateY(-3px);}
.book-card img{width:90px; height:135px; flex:none; border-radius:8px; object-fit:cover;}
.book-card h3{margin:.1rem 0 .5rem; font-size:1.05rem; color:var(--ink);}
.book-card p{margin:0 0 .8rem; font-size:.87rem; color:var(--ink-soft);}
.book-card a.more{font-size:.87rem; font-weight:500; color:var(--accent);}

footer{
  padding:2.8rem 1.5rem; font-size:.78rem; text-align:center; color:var(--ink-soft);
  border-top:1px solid var(--hairline);
}
footer a{color:var(--accent);}

/* Floating action buttons: back-to-top + back-to-home */
.back-to-top, .home-fab{
  position:fixed; right:1.5rem; z-index:80;
  width:44px; height:44px; border-radius:50%; border:1px solid var(--hairline);
  display:flex; align-items:center; justify-content:center;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  box-shadow:0 8px 24px rgba(0,0,0,.14), 0 1px 2px rgba(0,0,0,.06);
  color:var(--ink); cursor:pointer; padding:0; text-decoration:none;
  opacity:0; visibility:hidden; transform:translateY(10px);
  transition:opacity .25s ease, transform .25s ease, visibility .25s, box-shadow .2s ease;
}
.back-to-top{bottom:1.5rem;}
.home-fab{bottom:calc(1.5rem + 44px + .75rem);}
.back-to-top.visible, .home-fab.visible{opacity:1; visibility:visible; transform:translateY(0);}
.back-to-top:hover, .home-fab:hover{box-shadow:0 10px 28px rgba(0,0,0,.18); transform:translateY(-2px);}
.back-to-top:active, .home-fab:active{transform:translateY(0);}
.back-to-top svg, .home-fab svg{width:18px; height:18px; display:block;}
@media (max-width:640px){
  .back-to-top, .home-fab{right:1rem; width:40px; height:40px;}
  .back-to-top{bottom:1rem;}
  .home-fab{bottom:calc(1rem + 40px + .55rem);}
}

.no-results{display:none; text-align:center; padding:3rem; color:var(--ink-soft);}

.reveal{opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease;}
.reveal.in-view{opacity:1; transform:translateY(0);}

/* ---------- Audio / timeline page ---------- */
.timeline{
  max-width:820px; margin:0 auto; padding:1rem 0 2rem;
  display:flex; flex-direction:column; gap:0;
}
.timeline-item{
  display:grid; grid-template-columns:96px 1fr; gap:1.6rem;
  padding:2.2rem 0; position:relative;
}
.timeline-item + .timeline-item{border-top:1px solid var(--hairline);}
.date-badge{text-align:right; padding-top:.15rem;}
.date-badge .day{display:block; font-size:2.1rem; font-weight:600; color:var(--ink); line-height:1;}
.date-badge .month{display:block; font-size:.8rem; color:var(--ink-soft); margin-top:.3rem;}
.timeline-body h3{margin:0 0 .5rem; font-size:1.2rem; color:var(--ink);}
.timeline-body p{margin:0 0 1rem; font-size:.95rem; color:var(--ink-soft); max-width:560px;}
.timeline-body audio{display:block; width:100%; max-width:420px; height:40px; margin-bottom:.9rem;}
.timeline-link{
  display:inline-flex; align-items:center; gap:.2rem; font-size:.9rem; font-weight:500; color:var(--accent);
}
.timeline-link .chev{transition:transform .15s ease;}
.timeline-link:hover .chev{transform:translateX(3px);}

.page-back{max-width:820px; margin:0 auto; padding:1.6rem 0 0;}
.page-back a{font-size:.88rem; font-weight:500; color:var(--accent); display:inline-flex; align-items:center; gap:.2rem;}

@media (max-width:640px){
  .timeline-item{grid-template-columns:64px 1fr; gap:1rem;}
  .date-badge .day{font-size:1.6rem;}
}

@media (max-width:760px){
  nav.main-nav{
    position:fixed; top:48px; left:0; right:0; bottom:0; background:rgba(255,255,255,.98);
    flex-direction:column; align-items:flex-start; padding:2rem 1.5rem; gap:1.4rem;
    display:none;
  }
  nav.main-nav.open{display:flex;}
  nav.main-nav a{font-size:1.1rem;}
  .hero{padding:2.75rem 1.25rem 2.25rem;}
  .hero.hero-compact{padding:2.25rem 1.25rem 1.75rem;}
  .hero h1{font-size:1.9rem; margin:0 0 .7rem;}
  .hero p{font-size:1rem; line-height:1.45;}
  .hero .eyebrow{margin-bottom:.6rem;}
  .menu-toggle{display:block;}
  .toolbar{padding:1.1rem 1.25rem .8rem;}
}