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

body {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
    overflow: hidden;
}

.header {
    background-color: #000;
    color: white;
    padding: 20px;
    text-align: center;
}

.form-content {
    padding: 30px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
    color: #000;
}

.form-group input {
    border: 1px solid #000;
    border-radius: 5px;
    font-size: 16px;
    padding: 10px;
    width: 100%;
}

button {
    background-color: #000;
    border: none;
    border-radius: 5px;
    color: white;
    cursor: pointer;
    font-size: 16px;
    padding: 12px;
    width: 100%;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #333;
}

.back-link {
    color: #000;
    display: block;
    font-size: 14px;
    margin-top: 20px;
    text-align: center;
    text-decoration: none;
}

.back-link:hover {
    text-decoration: underline;
}

.message {
    background-color: #f0f0f0;
    border: 1px solid #000;
    border-radius: 5px;
    color: #000;
    margin-bottom: 20px;
    padding: 10px;
    text-align: center;
}

.error {
    background-color: #fff;
    border: 1px solid #000;
    color: #000;
}

.hidden {
    display: none;
}