/* Gibato — specimen-sheet: světle šedá rýsovací plocha, modrý a žlutý akcent */

:root{
  --bg:#f4f5f7;
  --panel:#ffffff;
  --dark:#23262b;
  --ink:#16181d;
  --muted:#656b75;
  --onDark:#f4f5f7;
  --blue:#2d5bd6;
  --gold:#c9a00f;
  --line:#c9ccd2;
  --mono:ui-monospace,Consolas,'Liberation Mono',monospace;
  --sans:system-ui,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --gap:88px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.75;
  overflow-x:hidden;
}

/* ---------- rámec stránky ---------- */
.frame{
  max-width:1180px;
  margin:0 auto;
  padding:40px 40px 0;
}
.sheet{
  background:var(--panel);
  border:1px solid var(--line);
  padding:40px;
}
.sheet--tint{background:var(--bg)}

.grid{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  column-gap:24px;
  row-gap:24px;
}

/* ---------- typografie ---------- */
h1,h2,h3,.meta,.tag,.num,nav a,.tbl th{
  font-family:var(--mono);
  text-transform:uppercase;
  letter-spacing:.09em;
  font-weight:600;
}
h1{
  grid-column:span 8;
  font-size:clamp(25px,3.5vw,40px);
  line-height:1.24;
  margin:0;
  letter-spacing:.02em;
}
h2{
  font-size:clamp(16px,1.6vw,19px);
  line-height:1.45;
  margin:0 0 18px;
  letter-spacing:.11em;
}
h3{
  font-size:14px;
  letter-spacing:.13em;
  margin:26px 0 8px;
  color:var(--ink);
}
p{margin:0 0 18px}
a{color:var(--blue)}
a:hover{text-decoration-thickness:2px}
a:focus-visible,button:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
}
.num{
  color:var(--gold);
  font-size:12px;
  letter-spacing:.22em;
  display:block;
  margin-bottom:10px;
}
.meta{
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--muted);
}
.lead{font-size:19px;line-height:1.7}
.caption{
  font-family:var(--mono);
  font-size:11.5px;
  line-height:1.6;
  letter-spacing:.06em;
  color:var(--muted);
  text-transform:none;
}

/* ---------- hlavička a navigace ---------- */
.topbar{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:12px 24px;
  padding-bottom:18px;
  margin-bottom:26px;
  border-bottom:1px solid var(--line);
}
.brand{
  font-family:var(--mono);
  font-size:17px;
  letter-spacing:.3em;
  text-transform:uppercase;
  font-weight:700;
  color:var(--ink);
  text-decoration:none;
}
.brand span{color:var(--gold)}
nav ul{
  display:flex;
  flex-wrap:wrap;
  gap:6px 22px;
  list-style:none;
  margin:0;padding:0;
}
nav a{
  font-size:11.5px;
  letter-spacing:.16em;
  color:var(--muted);
  text-decoration:none;
  padding:4px 0;
  border-bottom:1px solid transparent;
}
nav a:hover{color:var(--blue);border-bottom-color:var(--blue)}
nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--gold)}

/* ---------- hero ---------- */
.hero-head{align-items:start;margin-bottom:34px}
.hero-card{
  grid-column:span 4;
  border:1px solid var(--line);
  padding:16px 18px;
}
.hero-card dl{margin:0}
.hero-card div{
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding:7px 0;
  border-bottom:1px dotted var(--line);
  font-size:13px;
}
.hero-card div:last-child{border-bottom:0}
.hero-card dt{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0;
}
.hero-card dd{margin:0;text-align:right;color:var(--ink)}

.figure-main{grid-column:span 5;margin:0}
.figure-main img{
  display:block;
  width:100%;
  height:auto;
  border:1px solid var(--line);
}
.figure-side{
  grid-column:span 3;
  align-self:end;
  border-left:1px solid var(--gold);
  padding-left:14px;
}
.hero-text{grid-column:span 4}

/* ---------- textové sekce ---------- */
main section{margin-top:var(--gap)}
.col-text{grid-column:span 7}
.col-note{grid-column:8/13}

.tbl{
  width:100%;
  border-collapse:collapse;
  border:1px solid var(--line);
  font-size:13.5px;
}
.tbl caption{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  text-align:left;
  padding-bottom:8px;
}
.tbl th,.tbl td{
  border-bottom:1px solid var(--line);
  padding:9px 12px;
  text-align:left;
  vertical-align:top;
  line-height:1.55;
}
.tbl th{
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
  width:38%;
}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:0}

.note{
  border:1px solid var(--line);
  border-top:2px solid var(--gold);
  padding:16px 18px;
  font-size:14.5px;
  line-height:1.7;
}
.note p:last-child{margin-bottom:0}

ul.checks,ol.steps{
  margin:0 0 18px;
  padding-left:0;
  list-style:none;
}
ul.checks li{
  position:relative;
  padding-left:22px;
  margin-bottom:9px;
}
ul.checks li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:9px;height:1px;
  background:var(--blue);
}
ol.steps{counter-reset:s}
ol.steps li{
  counter-increment:s;
  position:relative;
  padding-left:38px;
  margin-bottom:12px;
}
ol.steps li::before{
  content:counter(s,decimal-leading-zero);
  position:absolute;left:0;top:2px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--gold);
}

/* ---------- oddělovač s vrypy ---------- */
.rule{
  position:relative;
  height:1px;
  background:var(--line);
  border:0;
  margin:var(--gap) 0 0;
}
.rule::before,.rule::after{
  content:"";
  position:absolute;
  top:-5px;
  width:1px;height:11px;
  background:var(--gold);
}
.rule::before{left:0}
.rule::after{right:0}

/* ---------- kontrastní sekce ---------- */
.dark{
  background:var(--dark);
  color:var(--onDark);
  padding:56px 40px;
  margin-top:var(--gap);
}
.dark h2,.dark h3{color:var(--onDark)}
.dark .caption,.dark .meta{color:#a8adb7}
.dark a{color:#9db6f5}
.dark .figure-detail{grid-column:1/6;margin:0}
.dark .figure-detail img{
  display:block;width:100%;height:auto;
  border:1px solid #3a3f47;
}
.dark .dark-text{grid-column:7/13}
.dark ul.checks li::before{background:var(--gold)}
.dark .note{border-color:#3a3f47;background:#282c32}

/* ---------- patička ---------- */
footer{
  max-width:1180px;
  margin:64px auto 0;
  padding:0 40px 48px;
}
.foot-inner{border-top:1px solid var(--line);padding-top:22px}
.foot-top{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  align-items:baseline;
  gap:10px 24px;
}
.foot-line{height:1px;background:var(--line);margin:18px 0}
.foot-nav ul{
  display:flex;flex-wrap:wrap;
  gap:8px 22px;
  list-style:none;margin:0 0 14px;padding:0;
}
.foot-nav a{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  text-decoration:none;
}
.foot-nav a:hover{color:var(--blue)}
.foot-note{
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  max-width:64ch;
  margin:0;
}

/* ---------- about ---------- */
.about-side{
  grid-column:8/13;
  display:flex;
  flex-direction:column;
  gap:18px;
}

/* ---------- responzivita ---------- */
@media (max-width:900px){
  :root{--gap:52px}
  .frame{padding:20px 18px 0}
  .sheet{padding:22px 18px}
  .dark{padding:36px 18px}
  footer{padding:0 18px 36px;margin-top:44px}
  .grid{grid-template-columns:1fr;row-gap:20px}
  h1,.hero-card,.hero-text,.figure-main,.figure-side,
  .col-text,.col-note,.about-side,
  .dark .figure-detail,.dark .dark-text{grid-column:1 / -1}
  .figure-main{max-width:420px}
  .dark .figure-detail{max-width:380px}
  .figure-side{border-left:0;border-top:1px solid var(--gold);padding:12px 0 0}
  body{font-size:16px}
}