body {
    font-family: 'Segoe UI', Arial, sans-serif; 
    text-align: center; 
    margin-top: 50px; 
    background: #1a1a1a; 
    color: #e0e0e0;
}
.container {
    width: 95%;
    max-width: 1200px;
    margin: 0 auto; 
    background: #2a2a2a; 
    padding: 30px; 
    border-radius: 10px; 
    box-shadow: 0 0 10px rgba(0,0,0,0.5); 
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.login-title {
    color: #007bff; 
    font-size: 28px; 
    font-weight: 300; 
    margin-bottom: 5px; 
    letter-spacing: 1px;
}
.login-subtitle {
    color: #007bff; 
    font-size: 14px; 
    font-weight: 300; 
    margin-bottom: 25px; 
    letter-spacing: 2px;
}
input, button {
    width: 80%; 
    padding: 12px; 
    margin: 8px; 
    font-size: 16px; 
    border-radius: 5px;
}
input {
    border: 1px solid #444; 
    background: #333; 
    color: #e0e0e0; 
    transition: border-color 0.3s;
}
input:focus {
    border-color: #007bff; 
    outline: none;
}
button {
    background: #007bff; 
    color: white; 
    border: none; 
    cursor: pointer; 
    font-weight: 500; 
    transition: background 0.3s;
}
button:hover {
    background: #0056b3;
}
.error {
    color: #ff6b6b; 
    margin-top: 10px;
}
.about-btn-login {
    position: fixed;
    top: 15px;
    right: 15px;
    background: #007bff;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    width: 40px;
    height: 40px;
    z-index: 1000;
}
.about-btn-login:hover {
    background: #0056b3;
}