body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f7f9;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.card {
    background: #ffffff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    text-align: center;
}

.icon {
    font-size: 50px;
    margin-bottom: 15px;
}

h1 {
    color: #333;
    margin-bottom: 5px;
    font-size: 1.8rem;
}

p {
    color: #777;
    font-size: 0.9rem;
}

.hwid-box {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    padding: 15px;
    border-radius: 12px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.2rem;
    font-weight: bold;
    color: #007bff;
    margin: 25px 0;
    word-break: break-all;
    min-height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.btn {
    background: #007bff;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #0056b3;
}

/* Loading Animation */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid #ddd;
    border-bottom-color: #007bff;
    border-radius: 50%;
    display: inline-block;
    animation: rotation 1s linear infinite;
}

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