/* Základ */
html {
  scroll-behavior: smooth;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", sans-serif;
}
body {
  background-color: #050505;
  color: #fff;
  line-height: 1.6;
}
.container {
  width: 90%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Hlavička */
header {
  background: #000;
  padding: 15px 0;
  border-bottom: 2px solid #243663;
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo-nav {
  height: 40px;
}

nav ul {
  display: flex;
  list-style: none;
}
nav ul li {
  margin-left: 20px;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: 0.3s;
}
nav ul li a:hover {
  color: #243663;
}

/* Hero Sekce - Místo Nissanu elegantní gradient */
.hero {
  height: 80vh;
  background: radial-gradient(circle at center, #10182b 0%, #050505 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.logo-main {
  width: 300px;
  margin-bottom: 30px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.hero h1 {
  font-size: 3rem;
  margin-bottom: 10px;
  font-weight: 800;
}
.hero p {
  font-size: 1.2rem;
  color: #aaa;
  margin-bottom: 30px;
}

/* Tlačítka */
.btn {
  display: inline-block;
  background: #243663;
  color: white;
  padding: 15px 40px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  transition: 0.3s;
  border: none;
  cursor: pointer;
}
.btn:hover {
  background: #1a284a;
  transform: translateY(-2px);
}
.btn-full {
  width: 100%;
}

/* Sekce */
section {
  padding: 100px 0;
}
.section-title {
  text-align: center;
  margin-bottom: 50px;
  font-size: 2.2rem;
  color: #fff;
}

/* Karty */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
}
.service-card {
  background: #0f0f0f;
  padding: 40px;
  border-radius: 10px;
  border: 1px solid #1a1a1a;
  text-align: center;
}
.service-card h3 {
  color: #243663;
  margin-bottom: 15px;
}

/* Formulář */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: #0f0f0f;
  padding: 40px;
  border-radius: 10px;
  border: 1px solid #222;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  margin-bottom: 5px;
  color: #888;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 12px;
  background: #000;
  border: 1px solid #333;
  color: #fff;
  border-radius: 4px;
}
.cena-box {
  background: rgba(36, 54, 99, 0.2);
  padding: 20px;
  text-align: center;
  margin: 20px 0;
  border-radius: 4px;
  border: 1px solid #243663;
}
.cena-vysledek {
  font-size: 2.2rem;
  font-weight: bold;
}

/* Kontakt */
.contact {
  text-align: center;
  background: #080808;
}
footer {
  padding: 30px;
  text-align: center;
  color: #333;
  font-size: 0.8rem;
}