body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;     background: linear-gradient(135deg, #6EC1FF, #4AA3FF); display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; }
.container { background: #fff; padding: 40px; border-radius: 15px; box-shadow: 0 15px 25px rgba(0,0,0,0.3); width: 350px; text-align: center; animation: slideIn 1s ease-in-out; }
input, button { width: 100%; margin: 10px 0; padding: 12px; border-radius: 8px; border: 1px solid #ccc; }
button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background: #0095f6;
    border: none;
    border-radius: 4px;
    color: #fff;
    font-weight: bold;
    cursor: pointer;
}
button:hover {
    background: #1877f2;
}
.error {
    color: #ed4956;
    font-size: 14px;
    margin-bottom: 10px;
}
@keyframes slideIn { from {opacity:0; transform: translateX(-50px);} to {opacity:1; transform: translateX(0);} }