/* Čávoprint — vizitka. Systémová písma, žádné externí zdroje. */
:root {
  --bg: #0d1117;
  --panel: #161b22;
  --line: #2a313b;
  --text: #e6edf3;
  --muted: #9aa5b1;
  --orange: #ee7a2c;
  --orange-hover: #f48c44;
  --red: #ca2a32;
  --blue: #527d8e;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px 32px;
}
main.text { padding-top: 48px; }

/* ---------- Úvod s volitelnou smyčkou videa ---------- */
.uvod {
  position: relative;
  overflow: hidden;
  padding: 48px 16px 8px;
}
.uvod-video {
  /* ztmavení videa nahoře / uprostřed */
  --zatm-a: .30;
  --zatm-b: .60;
  position: absolute;
  inset: 0;
  background: center / cover no-repeat;
  z-index: 0;
}
.uvod-video video { width: 100%; height: 100%; object-fit: cover; display: block; }
/* ztmavení, ať je text čitelný; dole plynule do barvy stránky */
.uvod-video::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13,17,23,var(--zatm-a)) 0%, rgba(13,17,23,var(--zatm-b)) 55%, rgba(13,17,23,.85) 85%, var(--bg) 100%);
}
.uvod .hero { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.uvod h1, .uvod .sub, .uvod .lead { text-shadow: 0 1px 12px rgba(0,0,0,.6); }
.uvod .sub { color: var(--text); }

a { color: var(--orange); }
a:hover { color: var(--orange-hover); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Úvod ---------- */
.hero { text-align: center; }

.hero .logo {
  display: block;
  width: 210px;
  max-width: 60vw;
  height: auto;
  margin: 0 auto 28px;
  filter: drop-shadow(0 10px 28px rgba(0, 0, 0, .45));
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(30px, 7vw, 40px);
  line-height: 1.15;
  letter-spacing: -.01em;
  text-wrap: balance;
}

.sub {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.lead { margin: 0 0 14px; }

/* ---------- Kontakt ---------- */
.kontakt {
  margin-top: 40px;
  padding: 24px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  text-align: center;
}
.kontakt h2 { margin: 0 0 6px; font-size: 22px; }
.kontakt p { margin: 0 0 18px; color: var(--muted); }

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  background: var(--orange);
  color: #1a1206;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { background: var(--orange-hover); color: #1a1206; }

.adresa {
  margin: 18px 0 0;
  font-size: 18px;
  font-weight: 600;
  word-break: break-all;
}
.adresa a { color: var(--text); text-decoration: none; }

.btn-copy {
  margin-top: 10px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}
.btn-copy:hover { color: var(--text); border-color: var(--muted); }

/* ---------- Text stránky Soukromí ---------- */
.text h1 { font-size: clamp(26px, 6vw, 32px); margin-bottom: 20px; }
.text p { margin: 0 0 16px; }
.zpet { display: inline-block; margin-bottom: 28px; font-size: 15px; }
.zpet img { width: 44px; height: auto; vertical-align: middle; margin-right: 10px; }

/* ---------- Patička ---------- */
footer {
  padding: 24px 16px 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}
footer p { margin: 0 0 6px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--text); }

@media (min-width: 720px) {
  .uvod { padding-top: 72px; }
  main.text { padding-top: 72px; }
  .hero .logo { width: 240px; }
}

/* ---------- Dvě nohy nabídky ---------- */
.lead { color: var(--text); }
.nabidka {
  display: grid;
  gap: 14px;
  margin-top: 32px;
}
.karta {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  border-radius: 14px;
}
.karta + .karta { border-top-color: var(--red); }
.karta h2 { margin: 0 0 6px; font-size: 20px; }
.karta p { margin: 0; color: var(--muted); }

.materialy { margin-top: 32px; }
.materialy h2 { margin: 0 0 12px; font-size: 20px; text-align: center; }
.materialy ul { margin: 0; padding: 0; list-style: none; }
.materialy li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.materialy li strong { color: var(--text); }
.materialy .zkr { font-size: 13px; opacity: .75; white-space: nowrap; }
.materialy p { margin: 16px 0 0; color: var(--muted); font-size: 15px; text-align: center; }

/* Ukázky (teď rendery, později fotky) */
.ukazky {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-top: 28px;
}
.ukazky figure { margin: 0; }
.ukazky figure:first-child { grid-column: 1 / -1; }
.ukazky img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 12px; display: block; }
.ukazky figure:first-child img { aspect-ratio: 16 / 10; }
.ukazky figcaption { margin-top: 6px; color: var(--muted); font-size: 14px; line-height: 1.35; text-align: center; }
.ukazky-pozn { margin: 10px 0 0; color: var(--muted); font-size: 13px; text-align: center; opacity: .8; }

@media (min-width: 720px) {
  .nabidka { grid-template-columns: 1fr 1fr; }
  .ukazky { grid-template-columns: repeat(3, 1fr); }
  .ukazky figure:first-child { grid-column: auto; }
  .ukazky figure:first-child img { aspect-ratio: 1; }
}