* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #f5f5f5;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-container { width: 100%; max-width: 400px; padding: 20px; }
.login-box {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    text-align: center;
}
.login-box h1 { font-size: 28px; margin-bottom: 30px; color: #333; }
.google-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    color: #333;
    text-decoration: none;
    transition: all 0.2s;
}
.google-btn:hover { background: #f8f8f8; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
#error-message { color: #c0392b; font-size: 14px; margin-top: 20px; }