* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
}

body {
  background: #e6e6e6; /* bílé pozadí */
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Kontejner formuláře */
.login-container {
  background: white;
  padding: 2rem;
  border-radius: 1rem;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  text-align: center;
  border: 1px solid #eee;
}

.login-container h2 {
  margin-bottom: 1.5rem;
  color: #333;
}

/* Skupiny vstupů */
.input-group {
  text-align: left;
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  color: #555;
}

.input-group input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid #ccc;
  border-radius: 0.5rem;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.input-group input:focus {
  outline: none;
  border-color: #2575fc;
  box-shadow: 0 0 0 2px rgba(37,117,252,0.15);
}

/* Tlačítko */
button {
  margin-top: 1rem;
  width: 100%;
  padding: 0.8rem;
  background: #005fa3;
  color: white;
  font-size: 1rem;
  font-weight: bold;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: #1a5ed6;
}

 .page-title {
  position: absolute;
  top: 40px;
  text-align: center;
  width: 100%;
}

.page-title h1 {
  font-size: 1.6rem;
  color: #333;
  font-weight: 700;
} 

.error-message {
  color: #d32f2f; /* červená */
  background: #fdecea; /* jemné červené pozadí */
  border: 1px solid #f5c2c0;
  padding: 0.6rem;
  border-radius: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}