/* =========================================================
   01 — ZÁKLAD WEBU
   ---------------------------------------------------------
   Globální pravidla pro celou stránku:
   - plynulé posouvání po kliknutí na kotvy
   - odstranění výchozích okrajů
   - základní písmo
   - zákaz vodorovného přetékání
   ========================================================= */

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
  background: #000099;
  font-family: Arial, sans-serif;
  color: #111;
}

* {
  box-sizing: border-box;
}


/* =========================================================
   02 — SPOLEČNÝ OBAL OBSAHU
   ---------------------------------------------------------
   Jednotná maximální šířka obsahu.
   ========================================================= */

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}


/* =========================================================
   03 — HORNÍ FIXNÍ MENU
   ---------------------------------------------------------
   Pruh menu nahoře.
   - poloprůhledné bílé pozadí jako hero box
   - modrá linka nahoře i dole
   - fixní pozice
   ========================================================= */

.topMenu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;

  background: rgba(255, 255, 255, 0.75);

  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  border-top: 2px solid #000099;
  border-bottom: 2px solid #000099;

  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}


/* =========================================================
   04 — VNITŘEK HORNÍHO MENU
   ---------------------------------------------------------
   Značka vlevo, odkazy vpravo.
   ========================================================= */

.topMenuInner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;

  display: flex;
  justify-content: space-between;
  align-items: center;
}


/* =========================================================
   05 — NÁZEV V MENU
   ========================================================= */

.brand {
  font-weight: bold;
  color: #000099;
  font-size: 18px;
}


/* =========================================================
   06 — ODKAZY V MENU
   ---------------------------------------------------------
   Hover: modré tlačítko, bílý text.
   ========================================================= */

.menuLinks {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 15px;
}

.menuLinks a {
  color: #111;
  text-decoration: none;
  font-weight: 600;
  padding: 9px 15px;
  border-radius: 9px;
  background: transparent;
  transition: all 0.2s ease;
}

.menuLinks a:hover {
  background: #000099;
  color: #fff;
}


/* =========================================================
   07 — HERO SEKCE
   ---------------------------------------------------------
   Úvodní fotografie.
   Obrázek: hero.jpg
   ========================================================= */

.hero {
  width: 100vw;
  height: 55vh;
  min-height: 420px;

  background-image: url("hero.jpg");
  background-size: cover;
  background-position: center;

  display: flex;
  align-items: flex-start;
  padding-top: 58px;
}


/* =========================================================
   08 — VNITŘEK HERO SEKCE
   ========================================================= */

.heroInner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px 20px 20px;
}


/* =========================================================
   09 — HERO BOX
   ---------------------------------------------------------
   Světlý průhledný box se sloganem.
   ========================================================= */

.heroBox {
  background: rgba(255, 255, 255, 0.75);
  padding: 34px 40px;
  border-radius: 14px;
  width: fit-content;
}

.heroBox h1 {
  margin: 0;
  white-space: nowrap;
  font-size: 58px;
  line-height: 1.05;
}

.heroSub {
  margin-top: 12px;
  font-size: 18px;
}


/* =========================================================
   10 — KOTVA PRO SLUŽBY
   ---------------------------------------------------------
   Neviditelný prvek před sekcí služeb.
   Řeší polohu po kliknutí na „Služby“ v menu.
   Čím větší záporné číslo v margin-top, tím níž se po kliknutí
   zobrazí dlaždice.
   ========================================================= */

.anchorServices {
  display: block;
  position: relative;
  top: -170px;
  visibility: hidden;
}


/* =========================================================
   11 — SLUŽBY: POZADÍ POD DLAŽDICEMI
   ---------------------------------------------------------
   Modrá sekce s technickým motivem.
   Motiv je v souboru pozadi-sluzby.svg.
   ========================================================= */

.services {
  padding: 24px 0;

  background-color: #0a3476;

  background-image:
    url("pozadi-sluzby.svg"),
    linear-gradient(
      180deg,
      #2d6fd4 0%,
      #1852aa 45%,
      #0a3476 100%
    );

  background-repeat: repeat;
}


/* =========================================================
   12 — MŘÍŽKA DLAŽDIC SLUŽEB
   ---------------------------------------------------------
   Desktop: 4 sloupce.
   Tablet: 2 sloupce.
   Mobil: 1 sloupec.
   ========================================================= */

.cardGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}


/* =========================================================
   13 — JEDNA DLAŽDICE SLUŽBY
   ========================================================= */

.card3d {
  border: 1px solid #cfd6dd;
  border-radius: 14px;
  overflow: hidden;
  background: #dfe3e8;

  box-shadow:
    0 2px 0 #c9cfd6,
    0 14px 28px rgba(15, 23, 42, 0.10);

  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease;

  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card3d:hover {
  transform: translateY(-6px);
  box-shadow:
    0 4px 0 #b9c0c9,
    0 22px 42px rgba(15, 23, 42, 0.16);
}

.card3d:hover .cardImage {
  transform: scale(1.04);
}


/* =========================================================
   14 — OBRÁZEK V DLAŽDICI
   ========================================================= */

.cardImage {
  height: 180px;
  background-size: cover;
  background-position: center;
  transition: transform 0.28s ease;
}

.cardImage.grayscale {
  filter: grayscale(30%);
}


/* =========================================================
   15 — TEXTOVÝ PANEL V DLAŽDICI
   ========================================================= */

.cardText {
  min-height: 82px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.35;
  background: #2f3742;
  color: #fff;
  border-top: 1px solid #3e4752;
}

.cardText b {
  color: #fff;
}


/* =========================================================
   16 — DETAILNÍ SEKCE
   ---------------------------------------------------------
   Používá se pro služby a realizace.
   scroll-margin-top kompenzuje fixní menu.
   ========================================================= */

.detailSection {
  padding: 74px 20px;
  scroll-margin-top: 90px;
}

#kontakt,
#realizace,
#nove-rozvody,
#rekonstrukce,
#opravy,
#technologie {
  scroll-margin-top: 90px;
}

.detailInner {
  max-width: 1200px;
  margin: 0 auto;

  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
  align-items: start;
}

.detailImage {
  height: 320px;
  border-radius: 18px;
  background-size: cover;
  background-position: center;
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.20);
}

.detailText {
  font-size: 17px;
  line-height: 1.65;
}

.detailText h2,
.contactCard h2 {
  margin: 0 0 14px 0;
  font-size: 34px;
  color: #000099;
}

.sectionA {
  background: #f4f6f8;
  color: #111;
}

.sectionB {
  background: #e8edf7;
  color: #111;
}

.backTop {
  margin-top: 20px;
  display: inline-block;
  font-size: 14px;
  text-decoration: none;
  color: #000099;
  font-weight: 600;
}


/* =========================================================
   17 — KONTAKT
   ========================================================= */

.contactSection {
  background: #000099;
  padding: 40px 20px 50px 20px;
  scroll-margin-top: 90px;
}

.contactCard {
  border: 1px solid #cfd6dd;
  border-radius: 18px;
  padding: 38px 42px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(0, 0, 80, 0.24);

  display: grid;
  grid-template-columns: 0.85fr 1.45fr;
  gap: 54px;
  align-items: center;
}

.contactInfo {
  padding-right: 38px;
  border-right: 1px solid rgba(0, 0, 153, 0.18);
}

.contactName {
  font-size: 20px;
  font-weight: 700;
  color: #000066;
}

.email {
  margin-top: 10px;
}

.area {
  margin-top: 8px;
}

.contactCall {
  text-align: left;
}

.contactCallText {
  font-size: 23px;
  line-height: 1.35;
  font-weight: 700;
  color: #202633;
}

.contactCallSub {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.5;
  color: #4a5260;
}

.contactPhone {
  display: inline-block;
  margin-top: 18px;
  color: #000099;
  font-size: 42px;
  line-height: 1;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 1px;
  transition: transform 0.2s ease;
}

.contactPhone:hover {
  transform: translateY(-2px);
}


/* =========================================================
   18 — VIZUÁLNÍ OŽIVENÍ DETAILŮ SLUŽEB
   ---------------------------------------------------------
   Jemné technické prvky bez změny obsahu:
   - text do bloku
   - světlý panel pod textem
   - modrá akcentní linka
   - dekorativní technické kruhy v pozadí
   - výraznější práce s fotografiemi
   ========================================================= */

.detailSection {
  position: relative;
  overflow: hidden;
}

.detailSection::before,
.detailSection::after {
  content: "";
  position: absolute;
  border: 1px solid rgba(0, 0, 153, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.detailSection::before {
  width: 280px;
  height: 280px;
  top: -170px;
  right: -90px;
}

.detailSection::after {
  width: 150px;
  height: 150px;
  bottom: -95px;
  left: -45px;
}

.detailInner {
  position: relative;
  z-index: 1;
}

.detailText {
  position: relative;
  padding: 30px 34px 30px 38px;
  background: rgba(255, 255, 255, 0.56);
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 80, 0.07);
  text-align: justify;
}

.detailText::before {
  content: "";
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 0;
  width: 5px;
  background: #000099;
  border-radius: 0 5px 5px 0;
}

.detailText h2 {
  text-align: left;
  position: relative;
  padding-bottom: 14px;
}

.detailText h2::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 12px;
  background: #000099;
  border-radius: 3px;
}

.detailText strong {
  color: #000066;
  font-weight: 700;
}

.detailImage {
  margin-top: 0;
}

.detailImage {
  position: relative;
  border: 6px solid rgba(255, 255, 255, 0.72);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.detailImage:hover {
  transform: translateY(-5px);
  box-shadow: 0 24px 46px rgba(0, 0, 0, 0.26);
}

.sectionA {
  background-color: #e7edf5;
  background-image:
    linear-gradient(rgba(0, 0, 153, 0.065) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 153, 0.065) 1px, transparent 1px),
    radial-gradient(circle at 82% 24%, rgba(45, 111, 212, 0.22), transparent 30%),
    linear-gradient(135deg, #eef3f8 0%, #dce5ef 100%);
  background-size:
    42px 42px,
    42px 42px,
    auto,
    auto;
}

.sectionB {
  background-color: #d8e2f1;
  background-image:
    linear-gradient(135deg, rgba(0, 0, 153, 0.075) 1px, transparent 1px),
    linear-gradient(45deg, rgba(0, 0, 153, 0.050) 1px, transparent 1px),
    radial-gradient(circle at 18% 72%, rgba(45, 111, 212, 0.24), transparent 32%),
    linear-gradient(135deg, #e1e9f5 0%, #ccd9ea 100%);
  background-size:
    58px 58px,
    58px 58px,
    auto,
    auto;
}


/* =========================================================
   19 — TABLET: DO 980 PX
   ========================================================= */

@media (max-width: 980px) {
  .detailImage {
    margin-top: 0;
  }

  .cardGrid {
    grid-template-columns: repeat(2, 1fr);
  }

  .detailInner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .detailImage {
    height: 260px;
  }

  .reverseMobile .detailImage {
    order: 2;
  }

  .reverseMobile .detailText {
    order: 1;
  }

  .contactCard {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .contactInfo {
    padding-right: 0;
    padding-bottom: 28px;
    border-right: 0;
    border-bottom: 1px solid rgba(0, 0, 153, 0.18);
  }

  .contactCall {
    text-align: left;
  }
}


/* =========================================================
   20 — MOBIL: DO 700 PX
   ========================================================= */

@media (max-width: 700px) {
  .detailText {
    padding: 24px 24px 24px 29px;
    text-align: left;
  }

  .detailText::before {
    top: 24px;
    bottom: 24px;
    width: 4px;
  }

  .topMenuInner {
    flex-direction: column;
    gap: 10px;
    padding: 12px 16px;
  }

  .brand {
    font-size: 16px;
    text-align: center;
  }

  .menuLinks {
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
  }

  .menuLinks a {
    padding: 8px 12px;
    font-size: 14px;
  }

  .hero {
    min-height: 420px;
    padding-top: 92px;
  }

  .heroInner {
    padding: 46px 20px 20px 20px;
  }

  .heroBox {
    width: auto;
    max-width: 88vw;
    padding: 26px 28px;
  }

  .heroBox h1 {
    font-size: 40px;
    line-height: 1.08;
    white-space: normal;
  }

  .heroSub {
    font-size: 17px;
  }

  .anchorServices {
    top: -125px;
  }

  .services {
    padding: 58px 0 58px 0;
  }

  .cardGrid {
    grid-template-columns: 1fr;
  }

  .cardImage {
    height: 220px;
  }

  .detailSection {
    padding: 58px 18px;
  }

  .detailText h2,
  .contactCard h2 {
    font-size: 28px;
  }

  .detailText {
    font-size: 16px;
  }

  .detailImage {
    height: 220px;
  }

  .contactSection {
    padding: 36px 18px 46px 18px;
  }

  .contactCard {
    padding: 28px 24px;
  }

  .contactCallText {
    font-size: 20px;
  }

  .contactPhone {
    font-size: 34px;
  }
}