body {
    background: linear-gradient(135deg, #74ebd5 0%, #ACB6E5 100%);
    font-family: 'Montserrat', sans-serif;
    min-height: 100vh;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container {
    background: rgba(255,255,255,0.98);
    border-radius: 20px;
    padding: 40px 32px;
    box-shadow: 0 6px 30px rgba(0,0,0,0.13);
    max-width: 400px;
    width: 100%;
}
h1 {
    text-align: center;
    background: linear-gradient(90deg, #ffaf7b, #d76d77, #3a8dde, #43cea2, #ffaf7b);
    -webkit-background-clip: text;
    color: transparent;
    background-clip: text;
    margin-bottom: 32px;
    font-weight: 700;
}
.teacher-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
label {
    font-weight: 600;
}
input[type="text"], input[type="email"], input[type="number"] {
    border-radius: 10px;
    border: 1px solid #c5d1e1;
    padding: 10px;
    font-size: 16px;
    outline: none;
    transition: border 0.2s;
}
input[type="text"]:focus, input[type="email"]:focus, input[type="number"]:focus {
    border: 1.5px solid #3a8dde;
}
button[type="submit"] {
    background: linear-gradient(90deg, #43cea2 0%, #185a9d 100%);
    color: white;
    font-size: 18px;
    font-weight: bold;
    border: none;
    padding: 13px;
    border-radius: 10px;
    margin-top: 10px;
    cursor: pointer;
    transition: background 0.2s;
}
button[type="submit"]:hover {
    background: linear-gradient(90deg, #185a9d 0%, #43cea2 100%);
}
.required {
    color: #e63946;
    font-weight: bold;
    margin-left: 4px;
}
.alert {
    color: #43cea2;
    font-size: 16px;
    margin-bottom: 20px;
    text-align: center;
}