body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background: #0077cc;
}
.login-container, .register-container {
    background: white;
    padding: 40px;
    border-radius: 14px;
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 400px;
}
h1 {
    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="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
}
input[type="email"]:focus,
input[type="password"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: #0077cc;
}
.btn {
    width: 100%;
    padding: 12px;
    background: #0077cc;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}
.btn:hover {
    background: #005fa3;
}
.error {
    color: #dc3545;
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 20px;
    display: none;
}
.success {
    color: #155724;
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 20px;
    display: none;
}
.links {
    text-align: center;
    margin-top: 20px;
}
.links a {
    color: #0077cc;
    text-decoration: none;
}
.links a:hover {
    text-decoration: underline;
}