body {
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: url("../Barvy/abstract-1780386_1920\ -\ kopie.png") no-repeat center center fixed;
  background-size: cover;
  color: #f0f0f0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center; 
  align-items: center;     
  text-align: center;
  gap: 1.5rem;
}


h1 {
  font-family: 'Pacifico', cursive;
  font-size: 3rem;
  color: #ffffff;
  text-shadow: 2px 2px 8px rgba(0,0,0,0.6);
}


button, nav a {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: #ffffff;
  background: #4a90e2;
  border: none;
  border-radius: 30px; 
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
}

header a {
    display: inline-block;
  padding: 0.8rem 1.6rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: #000000;
  background: #ffffff;
  border: none;
  border-radius: 30px; 
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;

}

button:hover, nav a:hover {
  background: #357abf;
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

header a:hover {
  background: #e0e0e0;
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}


.center {
  background: rgba(255, 255, 255, 0.15);
  padding: 2rem;
  border-radius: 30px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

#dnes {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: #ffffff;
}

.kalendar {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0.8rem;
}

.kalendar th {
  padding: 0.8rem;
  background: #4a90e2;
  color: #ffffff;
  border-radius: 30px;
  font-weight: 600;
}

.kalendar td {
  padding: 1rem;
  background: rgba(255,255,255,0.2);
  border-radius: 30px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.kalendar td:hover {
  background: #357abf;
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

.kalendar td.dnes {
  background: #4a90e2;
  color: #ffffff;
}