body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #3F51B5 0%, #2196F3 100%);
    min-height: 100vh;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

h1 {
    text-align: center;
    color: #3F51B5;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #333;
}

input[type="text"], input[type="password"], input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

input[type="text"]:focus, input[type="password"]:focus, input[type="email"]:focus {
    outline: none;
    border-color: #3F51B5;
}

.btn {
    width: 100%;
    background: linear-gradient(135deg, #3F51B5 0%, #2196F3 100%);
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: linear-gradient(135deg, #2196F3 0%, #3F51B5 100%);
}

.error {
    background: #fdeaea;
    color: #b71c1c;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.success {
    background: #e6f9ec;
    color: #1e7e34;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}