* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 400px;
}
h2 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
}
.form-group {
    margin-bottom: 20px;
}
label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: bold;
}
input[type="text"],
input[type="password"],
input[type="email"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}
input[type="text"]:focus,
input[type="password"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: #667eea;
}
button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}
button:hover {
    background: #5568d3;
}
.toggle {
    text-align: center;
    margin-top: 20px;
    color: #666;
}
.toggle a {
    color: #667eea;
    text-decoration: none;
    font-weight: bold;
}
.toggle a:hover {
    text-decoration: underline;
}
.form-container {
    display: none;
}
.form-container.active {
    display: block;
}
.message {
    padding: 10px;
    margin-bottom: 20px;
    border-radius: 5px;
    text-align: center;
}
.error {
    background: #fee;
    color: #c33;
    border: 1px solid #fcc;
}
.success {
    background: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}