body {
    background: linear-gradient(-45deg, #0f2027, #203a43, #2c5364, #000000);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: #ffffff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    max-width: 420px;
    width: 100%;
    transition: transform 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
}

.btn-google {
    background-color: #ea4335;
    color: white;
    border: none;
    transition: all 0.3s;
}

.btn-google:hover {
    background-color: #c5221f;
    color: white;
    box-shadow: 0 4px 15px rgba(234, 67, 53, 0.4);
}

.btn-github {
    background-color: #24292e;
    color: white;
    border: none;
    transition: all 0.3s;
}

.btn-github:hover {
    background-color: #111416;
    color: white;
    box-shadow: 0 4px 15px rgba(36, 41, 46, 0.4);
}

.btn-logout {
    background-color: transparent;
    color: #ff6b6b;
    border: 1px solid #ff6b6b;
    transition: all 0.3s;
}

.btn-logout:hover {
    background-color: #ff6b6b;
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.text-muted-custom {
    color: #adb5bd !important;
}