/* RESET + ZÁKLAD */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f9f9fb;
}

/* HLAVIČKA A NAVIGACE */
header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  flex-wrap: wrap;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.menu-toggle {
  display: none;
  font-size: 2rem;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: white;
  text-decoration: none;
  transition: opacity 0.3s;
}

.nav-links a:hover {
  opacity: 0.8;
}

/* RESPONSIVITA MENU */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    background-color: #667eea;
    padding: 1rem 2rem;
    display: none;
  }

  .nav-links.active {
    display: flex;
  }
}

/* OBSAH A SEKCÍ STYLY */
.hero {
  background: url("images/uvod.jpg") center top / cover no-repeat;
  color: white;
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
  min-height: 40vh;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.2); /* tmavší filtr */
  z-index: 0;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto;
}

section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

h2 {
  color: #667eea;
  margin-bottom: 2rem;
  font-size: 2rem;
}

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.service-card {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

.service-card:hover {
  transform: translateY(-5px);
}

.service-card h3 {
  color: #667eea;
  margin-bottom: 1rem;
}

.service-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

/* KONTAKT */
.contact-info {
  background: #f7fafc;
  padding: 2rem;
  border-radius: 10px;
  margin-bottom: 2rem;
}

.contact-info p {
  margin-bottom: 1rem;
}

.contact-form {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #4a5568;
}

input, textarea {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e2e8f0;
  border-radius: 5px;
  font-size: 1rem;
  transition: border-color 0.3s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: #667eea;
}

textarea {
  resize: vertical;
  min-height: 150px;
}

button {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 5px;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.3s;
}

button:hover {
  transform: scale(1.05);
}

footer {
  background: #2d3748;
  color: white;
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
}

.success-message {
  display: none;
  background: #48bb78;
  color: white;
  padding: 1rem;
  border-radius: 5px;
  margin-bottom: 1rem;
}