:root{
  --ground:#F1F5F5; --surface:#FFFFFF; --surface-2:#E4EDEE;
  --ink:#0C1C22; --muted:#4E6166; --line:#CFDCDD;
  --primary:#0B4A5A; --primary-ink:#FFFFFF; --primary-soft:#D3E9EA;
  --logo-dark:#0B4A5A; --logo-light:#8EC5C7; --logo-light-text:#4A8F95;
  --red:#C23B2E; --red-soft:#F7E1DE; --ok:#1F7A4D; --ok-soft:#DDF0E5;
  --display:"Plus Jakarta Sans","Segoe UI",system-ui,sans-serif;
  --body:"Inter Tight","Segoe UI",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --shadow:0 1px 2px rgba(12,28,34,.06), 0 12px 32px -12px rgba(12,28,34,.18);
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --ground:#0A1417; --surface:#101E22; --surface-2:#16292E;
  --ink:#E6F0F1; --muted:#93A9AD; --line:#21393F;
  --primary:#8EC5C7; --primary-ink:#0A1417; --primary-soft:#123038;
  --logo-dark:#2B8898; --logo-light:#9CD3D5; --logo-light-text:#9CD3D5;
  --red:#F07A6D; --red-soft:#3A1E1D; --ok:#5CC48E; --ok-soft:#15302A;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 12px 32px -12px rgba(0,0,0,.6);
}}
:root[data-theme="dark"]{
  --ground:#0A1417; --surface:#101E22; --surface-2:#16292E;
  --ink:#E6F0F1; --muted:#93A9AD; --line:#21393F;
  --primary:#8EC5C7; --primary-ink:#0A1417; --primary-soft:#123038;
  --logo-dark:#2B8898; --logo-light:#9CD3D5; --logo-light-text:#9CD3D5;
  --red:#F07A6D; --red-soft:#3A1E1D; --ok:#5CC48E; --ok-soft:#15302A;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 12px 32px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}
body{margin:0;background:var(--ground);color:var(--ink);font:400 18px/1.7 var(--body);
  letter-spacing:-.003em;-webkit-text-size-adjust:100%;text-size-adjust:100%;
  -webkit-tap-highlight-color:rgba(11,74,90,.15);-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--display);margin:0;line-height:1.15;letter-spacing:-.03em;text-wrap:balance}
p{margin:0}
a{color:var(--primary)}
:focus-visible{outline:3px solid var(--logo-light);outline-offset:2px;border-radius:6px}
.wrap{max-width:760px;margin:0 auto;padding-inline:clamp(16px,4vw,32px)}
.wrap-wide{max-width:1080px;margin:0 auto;padding-inline:clamp(16px,4vw,32px)}
.eyebrow{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:20;
  background:color-mix(in srgb,var(--ground) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px;padding-block:8px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark{width:38px;height:38px;flex:none;display:block}
.wordmark{display:grid;font-family:"Montserrat",var(--display);font-weight:800;letter-spacing:.09em;line-height:1;font-size:.95rem;text-transform:uppercase}
.wordmark b{color:var(--logo-dark)}
.wordmark i{font-style:normal;color:var(--logo-light-text);font-weight:700;letter-spacing:.2em;margin-top:3px}
.navlinks{display:flex;gap:6px;align-items:center}
.navlinks a{white-space:nowrap;font-size:.94rem;font-weight:600;text-decoration:none;color:var(--muted);padding:12px 10px;min-height:44px;display:flex;align-items:center;border-radius:8px}
.navlinks a:hover{color:var(--primary);background:var(--surface-2)}
@media (max-width:520px){.navlinks a.hide-xs{display:none}.navlinks a{font-size:.88rem;padding:12px 8px}}

/* přehled článků */
.bloghead{padding-block:clamp(32px,6vw,64px) 8px}
.bloghead h1{font-size:clamp(2rem,5vw,3rem);font-weight:800;margin-top:12px}
.bloghead p{color:var(--muted);font-size:1.1rem;margin-top:16px;max-width:62ch}
.postlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));gap:20px;margin:36px 0 0}
.post{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:24px;
  display:grid;gap:10px;align-content:start;text-decoration:none;color:var(--ink);
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease}
.post:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--primary) 40%,var(--line));box-shadow:var(--shadow)}
.post .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--logo-light-text)}
.post h2{font-size:1.18rem;font-weight:700;line-height:1.3}
.post p{color:var(--muted);font-size:.97rem;line-height:1.6}
.post .more{font-weight:600;font-size:.94rem;color:var(--primary)}

/* článek */
article{padding-block:clamp(28px,5vw,56px)}
article h1{font-size:clamp(1.9rem,4.6vw,2.8rem);font-weight:800;margin-top:12px}
article .perex{font-size:1.15rem;color:var(--muted);margin-top:18px}
article h2{font-size:clamp(1.3rem,3vw,1.6rem);font-weight:700;margin-top:38px}
article h3{font-size:1.1rem;font-weight:700;margin-top:26px}
article p{margin-top:16px}
article ul,article ol{margin-top:16px;padding-left:22px;display:grid;gap:8px}
article li{padding-left:4px}
article strong{color:var(--ink)}
article table{width:100%;border-collapse:collapse;margin-top:22px;font-size:.96rem}
article th,article td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
article th{font-family:var(--display);font-weight:700;background:var(--surface-2)}
.tablewrap{overflow-x:auto;margin-top:22px}
.tablewrap table{margin-top:0}
article blockquote{margin:24px 0 0;padding:18px 20px;background:var(--surface);border-left:4px solid var(--primary);border-radius:0 10px 10px 0}
article blockquote p:first-child{margin-top:0}
.note{margin-top:24px;background:var(--surface-2);border-radius:10px;padding:18px 20px;font-size:.96rem;color:var(--muted)}
.warn{margin-top:24px;background:var(--red-soft);border-radius:10px;padding:18px 20px;font-size:.98rem}
.warn strong{color:var(--red)}

/* výzva k akci */
.cta{margin-top:44px;background:var(--primary);color:var(--primary-ink);border-radius:14px;padding:clamp(24px,4vw,34px);display:grid;gap:14px}
.cta h2{font-size:clamp(1.4rem,3.4vw,1.9rem);font-weight:800;margin-top:0;color:var(--primary-ink)}
.cta p{color:inherit;opacity:.9;margin-top:0}
.cta .btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5em;font:600 1rem/1 var(--body);
  padding:16px 22px;min-height:52px;border-radius:10px;text-decoration:none;border:1.5px solid transparent;cursor:pointer}
.btn-light{background:var(--primary-ink);color:var(--primary)}
.btn-outline{background:transparent;color:var(--primary-ink);border-color:color-mix(in srgb,var(--primary-ink) 45%,transparent)}
.btn-primary{background:var(--primary);color:var(--primary-ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
@media (max-width:520px){.cta .btns .btn{flex:1 1 100%}}

.related{margin-top:44px;border-top:1px solid var(--line);padding-top:26px}
.related h2{font-size:1.2rem;margin-top:0}
.related ul{list-style:none;padding:0;margin-top:14px;display:grid;gap:10px}
.related a{font-weight:600;text-decoration:none}
.related a:hover{text-decoration:underline}

footer.site{margin-top:48px;padding-block:28px;border-top:1px solid var(--line);color:var(--muted);font-size:.92rem}
footer.site .row{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between}
footer.site a{color:var(--muted)}