:root {
    --primary-blue: #4285f4;
    --primary-hover: #357abd;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --background: #f8fafc;
    --card-bg: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.brand-header h1 {
    color: var(--text-dark);
    font-size: 1.8rem;
    margin: 0 0 0.5rem;
    font-weight: 700;
}

.brand-header p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: 2.5rem;
}

.auth-content h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
    margin: 0 0 0.5rem;
}

.login-instruction {
    color: var(--text-gray);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.google-login-btn {
    background: var(--primary-blue);
    color: white !important;
    padding: 1rem;
    border-radius: 12px;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.google-login-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
}

.login-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e2e8f0;
    color: var(--text-gray);
    font-size: 0.8rem;
}

@media (max-width: 480px) {
    .login-card {
        padding: 1.5rem;
        border-radius: 12px;
        margin: 0 1rem;
    }
    
    .brand-header h1 {
        font-size: 1.5rem;
    }
    
    .auth-content h2 {
        font-size: 1.3rem;
    }
}