.material-symbols-outlined {
    font-family: 'Material Symbols Outlined';
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    vertical-align: middle;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden;
}

iframe {
    width: 100%;
    height: 100vh;
    border: none;
    display: block;
}

.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 10px 20px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-family: Arial, sans-serif;
    font-size: 14px;
    z-index: 9999;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.back-button:hover {
    background: rgba(0, 0, 0, 0.9);
    transform: scale(1.05);
}