/* ==========================================================================
   SITEA, s.r.o. — design tokens
   Paleta odvozená z reálného materiálu firmy: beton základů, reseda-zelený
   nátěr stožárů (RAL 6011) a žlutá výstražná signalizace na vedení VN.
   ========================================================================== */

:root{
  --concrete:        #EDECE4;
  --concrete-deep:   #DAD8CB;
  --paper:           #F7F6F1;
  --ink:             #1C2018;
  --ink-soft:        #454C40;
  --steel:           #6E7568;
  --pylon:           #4E5E44;
  --pylon-deep:      #34402C;
  --pylon-line:      #8A9A78;
  --hazard:          #E3AE2E;
  --hazard-deep:     #B9860F;

  --display: "Big Shoulders Display", sans-serif;
  --body: "IBM Plex Sans", sans-serif;
  --mono: "IBM Plex Mono", monospace;

  --edge: 1px solid rgba(28,32,24,0.14);
  --container: 1180px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--concrete);
  color:var(--ink);
  font-family:var(--body);
  font-size:16px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{
  font-family:var(--display);
  font-weight:700;
  letter-spacing:0.2px;
  line-height:0.95;
  margin:0 0 0.4em;
  color:var(--ink);
  text-transform:uppercase;
}
p{ margin:0 0 1em; }
.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}
.eyebrow{
  font-family:var(--mono);
  font-size:12.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--pylon-deep);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:18px; height:2px;
  background:var(--hazard);
  display:inline-block;
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline:2px solid var(--hazard-deep);
  outline-offset:3px;
}
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------------------------------------------------------------- header */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(237,236,228,0.92);
  backdrop-filter:blur(6px);
  border-bottom:var(--edge);
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
.logo{
  display:flex; align-items:center; gap:10px;
  font-family:var(--display);
  font-size:26px;
  font-weight:700;
  letter-spacing:0.5px;
  color:var(--ink);
}
.logo .mark{
  width:16px; height:16px;
  background:var(--pylon);
  position:relative;
  flex:none;
}
.logo .mark::after{
  content:"";
  position:absolute; inset:3px;
  background:var(--hazard);
}
nav.primary{ display:flex; gap:2px; align-items:center; }
nav.primary a{
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:0.06em;
  text-transform:uppercase;
  padding:10px 16px;
  color:var(--ink-soft);
  border-bottom:2px solid transparent;
  transition:color .15s ease, border-color .15s ease;
}
nav.primary a:hover{ color:var(--pylon-deep); }
nav.primary a.active{ color:var(--ink); border-bottom-color:var(--hazard); }
.nav-toggle{ display:none; }

@media (max-width:760px){
  nav.primary{
    position:fixed; inset:76px 0 auto 0;
    background:var(--paper);
    flex-direction:column; align-items:stretch;
    border-bottom:var(--edge);
    transform:translateY(-8px);
    opacity:0; pointer-events:none;
    transition:opacity .18s ease, transform .18s ease;
  }
  nav.primary.open{ opacity:1; pointer-events:auto; transform:translateY(0); }
  nav.primary a{ padding:16px 28px; border-bottom:var(--edge); }
  .nav-toggle{
    display:flex; flex-direction:column; gap:5px;
    width:34px; height:24px; justify-content:center;
    background:none; border:none; cursor:pointer;
  }
  .nav-toggle span{ height:2px; background:var(--ink); display:block; }
}

/* ----------------------------------------------------------------- lattice divider (signature motif) */
.lattice{
  width:100%; height:34px;
  display:block;
}

/* ------------------------------------------------------------------- hero */
.hero{
  position:relative;
  min-height:88vh;
  display:flex; align-items:flex-end;
  background:#20261b;
  overflow:hidden;
}
.hero img{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  opacity:0.82;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(20,24,16,0.15) 0%, rgba(15,18,12,0.55) 62%, rgba(12,14,10,0.88) 100%);
}
.hero-inner{
  position:relative; z-index:2;
  padding:64px 28px 56px;
  max-width:var(--container);
  margin:0 auto;
  width:100%;
}
.hero .eyebrow{ color:var(--hazard); }
.hero .eyebrow::before{ background:var(--hazard); }
.hero h1{
  color:var(--paper);
  font-size:clamp(40px, 7vw, 88px);
  max-width:16ch;
}
.hero p.lede{
  color:#D9DACE;
  font-size:18px;
  max-width:52ch;
  margin:18px 0 30px;
}
.hero-cta{ display:flex; gap:14px; flex-wrap:wrap; }

/* --------------------------------------------------------------- buttons */
.btn{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--mono);
  font-size:13.5px;
  letter-spacing:0.05em;
  text-transform:uppercase;
  padding:14px 22px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .12s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-solid{ background:var(--hazard); color:var(--ink); }
.btn-solid:hover{ background:#EFC55A; transform:translateY(-1px); }
.btn-ghost{ border-color:rgba(247,246,241,0.5); color:var(--paper); }
.btn-ghost:hover{ border-color:var(--paper); background:rgba(247,246,241,0.08); }
.btn-dark{ background:var(--ink); color:var(--paper); }
.btn-dark:hover{ background:var(--pylon-deep); }

/* ------------------------------------------------------------- sections */
section{ padding:88px 0; }
section.tight{ padding:56px 0; }
.section-head{
  display:flex; justify-content:space-between; align-items:flex-end;
  gap:24px; margin-bottom:44px; flex-wrap:wrap;
}
.section-head h2{ font-size:clamp(30px,4vw,46px); margin:0; max-width:20ch; }
.section-head .lede{ max-width:44ch; color:var(--ink-soft); margin:0; }

.bg-paper{ background:var(--paper); }
.bg-deep{ background:var(--pylon-deep); color:var(--paper); }
.bg-deep h2, .bg-deep h3, .bg-deep .eyebrow{ color:var(--paper); }
.bg-deep .eyebrow::before{ background:var(--hazard); }
.bg-deep p{ color:#D6D9CC; }

/* -------------------------------------------------------- fact / stat row */
.facts{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:var(--edge);
}
.fact{
  padding:28px 22px;
  border-right:var(--edge);
  border-bottom:var(--edge);
}
.fact:last-child{ border-right:none; }
.fact .num{
  font-family:var(--mono);
  font-size:34px;
  color:var(--pylon-deep);
  display:block;
  margin-bottom:6px;
}
.fact .label{
  font-size:13.5px;
  color:var(--ink-soft);
}
@media (max-width:760px){
  .facts{ grid-template-columns:repeat(2,1fr); }
  .fact{ border-right:none; }
  .fact:nth-child(odd){ border-right:var(--edge); }
}

/* ----------------------------------------------------------- service cards */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:rgba(28,32,24,0.14);
  border:var(--edge);
}
.grid-4{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:rgba(28,32,24,0.14);
  border:var(--edge);
}
.card{
  background:var(--paper);
  padding:34px 28px;
  position:relative;
}
.card .idx{
  font-family:var(--mono);
  color:var(--pylon-line);
  font-size:13px;
  position:absolute; top:20px; right:24px;
}
.card h3{ font-size:22px; max-width:14ch; }
.card p{ color:var(--ink-soft); font-size:15px; margin-bottom:0; }
@media (max-width:900px){
  .grid-3, .grid-4{ grid-template-columns:1fr 1fr; }
}
@media (max-width:560px){
  .grid-3, .grid-4{ grid-template-columns:1fr; }
}

/* --------------------------------------------------------------- gallery / field tags */
.gallery{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
@media (max-width:900px){ .gallery{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .gallery{ grid-template-columns:1fr; } }

.shot{
  position:relative;
  background:var(--ink);
  overflow:hidden;
}
.shot img{
  width:100%; height:100%;
  aspect-ratio:3/4;
  object-fit:cover;
  transition:transform .5s ease;
}
.shot:hover img{ transform:scale(1.04); }
.field-tag{
  position:absolute; left:14px; bottom:14px; right:14px;
  font-family:var(--mono);
  font-size:12px;
  color:#EDECE4;
  background:rgba(20,24,16,0.72);
  padding:9px 12px;
  display:flex; flex-direction:column; gap:2px;
  border-left:3px solid var(--hazard);
}
.field-tag .site{ text-transform:uppercase; letter-spacing:0.05em; color:var(--paper); font-size:13px; }
.field-tag .meta{ color:#B7BCA9; }

/* ------------------------------------------------------------------ CTA band */
.cta-band{
  display:flex; align-items:center; justify-content:space-between;
  gap:28px; flex-wrap:wrap;
}
.cta-band h2{ margin:0; font-size:clamp(28px,4vw,44px); max-width:16ch; }

/* --------------------------------------------------------------- job list */
.job{
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;
  gap:20px;
  padding:26px 0;
  border-bottom:var(--edge);
}
.job:first-child{ border-top:var(--edge); }
.job h3{ font-size:22px; margin:0 0 6px; }
.job .tags{ display:flex; gap:8px; flex-wrap:wrap; }
.job .tag{
  font-family:var(--mono); font-size:11.5px; text-transform:uppercase;
  letter-spacing:0.05em; color:var(--pylon-deep);
  border:1px solid var(--pylon-line); padding:3px 9px;
}
.job .tag.open{ color:var(--hazard-deep); border-color:var(--hazard-deep); }

/* --------------------------------------------------------------------- table (O nás) */
.datasheet{ width:100%; border-collapse:collapse; }
.datasheet tr{ border-bottom:var(--edge); }
.datasheet tr:first-child{ border-top:var(--edge); }
.datasheet th, .datasheet td{
  text-align:left; padding:16px 4px; vertical-align:top;
}
.datasheet th{
  font-family:var(--mono); font-size:13px; letter-spacing:.04em;
  color:var(--ink-soft); font-weight:400; width:38%;
  text-transform:uppercase;
}
.datasheet td{ font-size:16px; }

/* ------------------------------------------------------------------ contact */
.contact-grid{
  display:grid; grid-template-columns:1fr 1fr; gap:56px;
}
@media (max-width:800px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-item{ margin-bottom:22px; }
.contact-item .label{
  font-family:var(--mono); font-size:12.5px; text-transform:uppercase;
  letter-spacing:.06em; color:var(--steel); margin-bottom:4px;
}
.contact-item a{ font-size:19px; }
.contact-item a:hover{ color:var(--pylon-deep); }

form.contact-form{ display:flex; flex-direction:column; gap:16px; }
.contact-form label{
  font-family:var(--mono); font-size:12.5px; text-transform:uppercase;
  letter-spacing:.05em; color:var(--ink-soft); margin-bottom:6px; display:block;
}
.contact-form input, .contact-form textarea, .contact-form select{
  width:100%;
  font-family:var(--body); font-size:15px;
  padding:13px 14px;
  border:var(--edge);
  background:var(--paper);
  color:var(--ink);
}
.contact-form textarea{ min-height:120px; resize:vertical; }

/* ------------------------------------------------------------------ footer */
footer{
  background:var(--ink);
  color:#B7BCA9;
  padding:56px 0 28px;
}
footer .wrap{
  display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px;
}
@media (max-width:760px){ footer .wrap{ grid-template-columns:1fr; gap:32px; } }
footer h4{ color:var(--paper); font-size:16px; margin-bottom:14px; }
footer a{ display:block; margin-bottom:8px; color:#B7BCA9; }
footer a:hover{ color:var(--paper); }
.footer-bottom{
  border-top:1px solid rgba(247,246,241,0.12);
  margin-top:40px; padding-top:20px;
  font-family:var(--mono); font-size:12px; color:#7E846F;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px;
}

/* -------------------------------------------------------------- page hero (inner pages) */
.page-hero{
  padding:64px 0 40px;
  border-bottom:var(--edge);
}
.page-hero h1{ font-size:clamp(36px,6vw,64px); max-width:18ch; }
.page-hero p.lede{ max-width:56ch; color:var(--ink-soft); font-size:17.5px; }

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