body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Tahoma', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.container {
    padding: 20px;
}

h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* افکت لودر برای زیبایی بیشتر */
.loader {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid #ff7e5f;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
}