:root{
  /* pozadí */
  --bg0:#f6f3ee;        /* hlavní písek */
  --bg1:#efe9df;        /* lehký přechod */
  --card:#ffffff;
  --card2:#f9f7f3;

  /* text */
  --text:#1f2a44;       /* tmavě modrá */
  --muted:#5f6c85;      /* tlumená modrošedá */

  /* linky & akcent */
  --line:#d6d1c8;
  --accent:#3b6ea5;     /* studená modrá */
  --accent2:#5a8fc7;

  /* stín */
  --shadow: 0 10px 22px rgba(30,40,60,.12);
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family: system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 420px at 20% 0%, rgba(90,143,199,.12), transparent 55%),
    linear-gradient(180deg,var(--bg0),var(--bg1));
}

.wrap{
  max-width:1200px;
  margin:0 auto;
  padding:0 18px;
}

.muted{color:var(--muted)}

/* HERO */
.hero{
  padding:48px 0 28px;
  border-bottom:1px solid var(--line);
}
.hero-inner{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:22px;
}
.kicker{
  color:var(--accent);
  font-size:.85rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  margin-bottom:8px;
}
.kicker a{
  color:var(--accent);
  text-decoration: none;
}
.hero h1{
  margin:0 0 10px;
  font-size:2.25rem;
  line-height:1.15;
}
.hero p{
  margin:0;
  color:var(--muted);
  line-height:1.65;
  max-width:62ch;
}

.hero-actions{
  margin-top:16px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.btn{
  padding:10px 14px;
  border-radius:12px;
  background:linear-gradient(180deg,#ffffff,#f1f4f8);
  border:1px solid var(--line);
  color:var(--text);
  text-decoration:none;
  box-shadow:var(--shadow);
}
.btn.ghost{
  background:transparent;
}

/* TOC */
.hero-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px;
  box-shadow:var(--shadow);
}
.hero-card-title{
  font-weight:650;
  margin-bottom:10px;
}
.toc{
  display:grid;
  gap:8px;
}
.toc a{
  text-decoration:none;
  color:var(--muted);
  padding:10px;
  border-radius:10px;
  border:1px solid transparent;
}
.toc a:hover{
  color:var(--text);
  border-color:var(--accent);
  background:#eef4fb;
}

/* CONTENT */
.content{
  padding:26px 18px 60px;
  display:grid;
  gap:26px;
}

/* SECTIONS */
.section-head h2{
  margin:0;
  font-size:1.6rem;
}
.section-head p{
  margin:0;
  color:var(--muted);
}

/* SECTION HEADER CARD */
.card-head{
  background: #c2d2e3;
  border: 1px solid #969b9f;
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.card-head h2{
  margin: 0;
  font-size: 1.55rem;
}

.card-head p{
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.55;
}

/* ARCHITECTURE */
.architecture{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px;
  box-shadow:var(--shadow);
  margin-top: 26px;
}
.arch-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  align-items:center;
  padding:8px 0;
}
.pill{
  padding:10px 12px;
  border-radius:999px;
  background:#f3f6fb;
  border:1px solid var(--line);
  font-size:.95rem;
}
.arrow{
  color:var(--muted);
}
.arch-note{
  margin-top:8px;
  color:var(--muted);
  font-size:.9rem;
}

/* BLOCKS */
.block{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:18px;
  padding:18px;
  border-radius:18px;
  background:var(--card);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.block.reverse{
  grid-template-columns:.95fr 1.05fr;
}
.block.reverse .block-text{order:2}
.block.reverse .block-media{order:1}

.block-text h2{
  margin:0 0 6px;
  font-size:1.45rem;
}
.block-text p{
  margin-top:10px;
  color:var(--muted);
  line-height:1.65;
}

/* TAGS */
.tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:6px;
}
.tags span{
  padding:6px 10px;
  border-radius:999px;
  background:#eef4fb;
  border:1px solid rgba(59,110,165,.35);
  color:#2c4f7a;
  font-size:.85rem;
}

/* SPEC BOX */
.spec{
  margin-top:12px;
  padding:12px;
  border-radius:14px;
  background:#f7f9fc;
  border:1px solid var(--line);
  font-size:.95rem;
}
.spec b{color:var(--text)}

/* MEDIA */
.block-media{
  border-radius:16px;
  border:1px solid var(--line);
  overflow:hidden;
  background:#f2f4f7;
}
.block-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  min-height:240px;
}
.block-media figcaption{
  padding:10px 12px;
  font-size:.85rem;
  color:var(--muted);
  border-top:1px solid var(--line);
}

/* PLACEHOLDER */
.placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
}
.ph{
  border:1px dashed var(--line);
  border-radius:14px;
  padding:14px;
  background:#fafbfc;
}
.ph-title{
  font-weight:650;
}
.ph-text{
  color:var(--muted);
}

/* FOOTER */
.footer{
  border-top:1px solid var(--line);
  padding:18px 0;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
}
.top{
  text-decoration:none;
  color:var(--muted);
}
.top:hover{color:var(--text)}

/* RESPONSIVE */
@media (max-width:920px){
  .hero-inner{grid-template-columns:1fr}
  .block,
  .block.reverse{grid-template-columns:1fr}
  .block.reverse .block-text,
  .block.reverse .block-media{order:unset}
}