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

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

/* A HTML-ben lévő .card-container osztályhoz igazítva */
.card-container {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

h2 {
    color: #333;
    margin-bottom: 8px;
    font-size: 24px;
}

.subtitle {
    color: #666;
    font-size: 14px;
    margin-bottom: 24px;
}

/* Beviteli mezők csoportja */
.input-group {
    text-align: left;
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    font-size: 14px;
    color: #4a5568;
    margin-bottom: 6px;
    font-weight: 600;
}

.input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s ease;
    outline: none;
}

.input-group input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

/* Elsődleges gomb (#bTN és .btn-primary) */
.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s, opacity 0.2s;
    margin-bottom: 16px;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-primary:active {
    transform: scale(0.98);
}

/* Hibaüzenet */
#error-msg {
    color: #e53e3e;
    font-size: 13px;
    margin-bottom: 10px;
    font-weight: 500;
}

/* Dizájnos Regisztráció link */
.card-container p a {
    color: #764ba2;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.2s ease, border-bottom 0.2s ease;
    border-bottom: 2px solid transparent;
    padding-bottom: 2px;
}

.card-container p a:hover {
    color: #667eea;
    border-bottom: 2px solid #667eea;
}