body {
    background: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.login-container {
    background: white;
    padding: 2.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
    text-align: center;
    position: relative;
    min-height: 230px;
}

h2 {
    color: #1a73e8;
    margin-bottom: 2rem;
    font-size: 1.8em;
}

.btn-google {
    background: #fff;
    border: 1px solid #dadce0;
    border-radius: 4px;
    padding: 12px 24px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
}

.btn-google:hover {
    background: #f8f9fa;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn-google img {
    transition: transform 0.2s ease;
}

.btn-google:hover img {
    transform: scale(1.1);
}

.spinner {
    display: none;
    justify-content: center;
    align-items: center;
    margin-top: 1.5rem;
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: absolute;
    left: 48%;
    transform: translate(-50%, -50%); 
    border-top-color: #007bff;
}

.spinner::after {
    content: "";
    width: 30px;
    height: 30px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #1a73e8;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}



@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 480px) {
    .login-container {
        padding: 1.5rem;
        margin: 1rem;
    }
}