/* GASKLIMAT s.r.o. — shared stylesheet
   Design concept: "Overiteľná dokumentácia" — technical drawing / stamped-document aesthetic */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root{
  --paper: #F6F5F1;
  --paper-2: #EFEDE6;
  --ink: #1E2224;
  --ink-soft: #4A5155;
  --blue: #1F4E5F;
  --blue-deep: #163A47;
  --orange: #C1521F;
  --orange-deep: #9E4318;
  --line: #D9D6CF;
  --line-strong: #BEBAAF;
  --white: #FFFFFF;
  --radius: 3px;
  --max: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.mono{ font-family: 'IBM Plex Mono', monospace; }

a{ color: var(--blue); text-decoration: none; }
a:hover{ text-decoration: underline; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

img{ max-width:100%; display:block; }

.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header{
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:16px;
  padding-bottom:16px;
  gap: 24px;
}
.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-weight:700;
  font-size:17px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand .mark{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  font-weight:600;
  color: var(--orange);
  border: 1px solid var(--orange);
  border-radius: var(--radius);
  padding: 2px 6px;
  letter-spacing: .04em;
}
nav.main-nav{ display:flex; gap: 28px; align-items:center; }
nav.main-nav a{
  color: var(--ink-soft);
  font-size: 14.5px;
  font-weight: 500;
}
nav.main-nav a:hover{ color: var(--blue); text-decoration:none; }
.nav-cta{
  background: var(--orange);
  color: #fff !important;
  padding: 9px 18px;
  border-radius: var(--radius);
  font-weight:600 !important;
  font-size: 13.5px !important;
}
.nav-cta:hover{ background: var(--orange-deep); text-decoration:none !important; }

/* mobile nav toggle (simple, no JS dependency needed beyond checkbox hack) */
.nav-toggle{ display:none; }
@media (max-width: 860px){
  nav.main-nav{
    display:none;
  }
  .nav-toggle{
    display:inline-block;
    background:none;border:1px solid var(--line-strong);
    border-radius:var(--radius);
    padding:8px 12px;
    font-family:'IBM Plex Mono',monospace;
    font-size:12px;
  }
}

/* ---------- Eyebrow / labels ---------- */
.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  text-transform:uppercase;
  letter-spacing:.12em;
  font-size:11.5px;
  color: var(--orange);
  margin-bottom:10px;
  display:block;
}

/* ---------- Hero ---------- */
.hero{
  padding: 64px 0 56px;
  border-bottom: 1px solid var(--line);
}
.hero h1{
  font-size: clamp(30px, 4.4vw, 46px);
  line-height:1.12;
  margin: 0 0 18px;
  font-weight:700;
  letter-spacing:-0.015em;
  max-width: 18ch;
}
.hero .sub{
  font-size: 18px;
  color: var(--ink-soft);
  max-width: 58ch;
  margin: 0 0 28px;
}
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight:600;
  font-size: 14.5px;
  border: 1px solid transparent;
  cursor:pointer;
}
.btn-primary{ background: var(--orange); color:#fff; }
.btn-primary:hover{ background: var(--orange-deep); text-decoration:none; }
.btn-secondary{ background:transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-secondary:hover{ border-color: var(--ink); text-decoration:none; }

/* ---------- Sections ---------- */
section{ padding: 56px 0; border-bottom: 1px solid var(--line); }
section:last-of-type{ border-bottom:none; }
section h2{
  font-size: clamp(22px, 3vw, 30px);
  margin: 0 0 28px;
  font-weight:700;
  letter-spacing:-0.01em;
}
section h3{ font-size:19px; margin: 0 0 8px; font-weight:600; }

/* ---------- Stamp / verification badge — signature element ---------- */
.stamp{
  border: 1.5px solid var(--blue);
  border-radius: var(--radius);
  padding: 16px 18px;
  position: relative;
  background: var(--white);
}
.stamp::before{
  content:"";
  position:absolute;
  top:6px; left:6px; right:6px; bottom:6px;
  border: 1px dashed var(--blue);
  border-radius: 2px;
  opacity:.35;
  pointer-events:none;
}
.stamp .stamp-label{
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px;
  text-transform:uppercase;
  letter-spacing:.1em;
  color: var(--blue);
  margin-bottom:6px;
}
.stamp .stamp-title{ font-weight:600; font-size:15.5px; margin-bottom:4px; }
.stamp .stamp-id{
  font-family:'IBM Plex Mono', monospace;
  font-size:14px;
  color: var(--ink-soft);
}
.stamp .stamp-verify{
  margin-top:10px;
  font-size:12.5px;
}
.stamp-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap:16px;
}
@media (max-width:640px){ .stamp-grid{ grid-template-columns:1fr; } }

/* ---------- Cards ---------- */
.card{
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.grid-3{ display:grid; grid-template-columns: repeat(3,1fr); gap:20px; }
.grid-2{ display:grid; grid-template-columns: repeat(2,1fr); gap:20px; }
@media (max-width:780px){ .grid-3, .grid-2{ grid-template-columns:1fr; } }

.service-card h3{ margin-bottom:10px; }
.service-card p{ color: var(--ink-soft); font-size:14.5px; margin:0 0 14px; }
.service-card a.more{ font-size:13.5px; font-weight:600; }

/* ---------- Table ---------- */
table{ width:100%; border-collapse: collapse; font-size:14.5px; }
th, td{ text-align:left; padding:10px 12px; border-bottom:1px solid var(--line); vertical-align:top; }
th{ font-family:'IBM Plex Mono',monospace; font-size:11.5px; text-transform:uppercase; letter-spacing:.06em; color:var(--ink-soft); font-weight:600; }

/* ---------- Timeline ---------- */
.timeline{ border-left: 2px solid var(--line-strong); padding-left: 24px; margin-left: 6px; }
.timeline-item{ position:relative; padding-bottom: 30px; }
.timeline-item::before{
  content:"";
  position:absolute;
  left:-30px; top:4px;
  width:10px;height:10px;
  border-radius:50%;
  background: var(--orange);
}
.timeline-item .period{ font-family:'IBM Plex Mono',monospace; font-size:12.5px; color:var(--blue); font-weight:600; }
.timeline-item h3{ margin:4px 0 6px; }
.timeline-item p{ color: var(--ink-soft); margin:0; font-size:14.5px; }

/* ---------- FAQ ---------- */
details.faq-item{
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
details.faq-item summary{
  cursor:pointer;
  font-weight:600;
  font-size:15.5px;
  list-style:none;
  display:flex;
  justify-content:space-between;
  gap:12px;
}
details.faq-item summary::-webkit-details-marker{ display:none; }
details.faq-item summary::after{
  content:"+";
  font-family:'IBM Plex Mono',monospace;
  color: var(--orange);
  font-size:18px;
  flex-shrink:0;
}
details.faq-item[open] summary::after{ content:"–"; }
details.faq-item .faq-answer{ margin-top:10px; color: var(--ink-soft); font-size:14.5px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb{
  font-size:13px;
  color: var(--ink-soft);
  padding: 14px 0;
}
.breadcrumb a{ color: var(--ink-soft); }

/* ---------- CTA band ---------- */
.cta-band{
  background: var(--blue);
  color: #fff;
  padding: 48px 0;
  text-align:center;
}
.cta-band h2{ color:#fff; margin-bottom:10px; }
.cta-band p{ color: #C9D8DC; margin: 0 0 24px; }
.cta-band .btn-primary{ background: var(--orange); }

/* ---------- Footer ---------- */
footer{
  background: var(--ink);
  color: #B9BEC0;
  padding: 40px 0 28px;
  font-size:13.5px;
}
footer a{ color:#fff; }
footer .foot-grid{ display:grid; grid-template-columns: 2fr 1fr 1fr; gap:32px; margin-bottom:24px; }
footer h4{ color:#fff; font-size:12.5px; text-transform:uppercase; letter-spacing:.08em; margin:0 0 12px; }
footer ul{ list-style:none; padding:0; margin:0; }
footer li{ margin-bottom:8px; }
footer .fine{ border-top:1px solid #33383A; padding-top:18px; font-size:12px; color:#7C8285; }
@media (max-width:780px){ footer .foot-grid{ grid-template-columns:1fr; } }

/* ---------- Poradňa list ---------- */
.topic-list{ list-style:none; padding:0; margin:0; }
.topic-list li{ border-bottom:1px solid var(--line); }
.topic-list a{
  display:flex; justify-content:space-between; gap:16px;
  padding: 16px 4px;
  color: var(--ink);
  font-weight:500;
}
.topic-list a:hover{ color:var(--blue); text-decoration:none; }
.topic-list .cat{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  color: var(--ink-soft);
  white-space:nowrap;
  padding-top:2px;
}

/* ---------- Misc ---------- */
.note-box{
  border-left: 3px solid var(--orange);
  background: var(--paper-2);
  padding: 16px 18px;
  font-size: 14px;
  color: var(--ink-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.small{ font-size: 13px; color: var(--ink-soft); }
ul.plain{ padding-left: 20px; }
ul.plain li{ margin-bottom:8px; color: var(--ink-soft); }