body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    font-family: 'Roboto', 'Arial', sans-serif;
    -webkit-user-select: none;
    user-select: none;
    touch-action: none;
}

video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    pointer-events: none;
}

video::-webkit-media-controls {
    display: none !important;
}

video:fullscreen {
    controls: none;
}

#error-message {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #f1f1f1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

#redirect-box, #error-box {
    background-color: #fff;
    width: 450px;
    max-width: 90%;
    border: 1px solid #ccc;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.youtube-header {
    background-color: #ff0000;
    color: #fff;
    padding: 10px 15px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.youtube-error-header {
    background-color: #606060;
}

.youtube-logo {
    font-size: 18px;
    font-weight: bold;
}

.youtube-content {
    padding: 20px;
    text-align: center;
}

.youtube-content h2 {
    color: #030303;
    font-size: 20px;
    margin-bottom: 10px;
}

.youtube-content p {
    color: #606060;
    font-size: 14px;
    margin: 5px 0;
}

.progress-container {
    width: 100%;
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    margin: 15px 0;
}

#progress-bar {
    width: 0;
    height: 100%;
    background: linear-gradient(to right, #ff6666, #cc0000);
    border-radius: 4px;
    transition: width 0.2s ease;
}

#progress-percentage {
    color: #606060;
    font-size: 14px;
    margin: 5px 0;
}

.instruction {
    margin-top: 15px;
    font-size: 13px;
}

.instruction a {
    color: #065fd4;
    text-decoration: none;
    display: block;
}

.instruction a:hover {
    text-decoration: underline;
    cursor: pointer;
}

.spinner {
    margin: 15px auto 0;
    width: 30px;
    height: 30px;
    border: 3px solid #e0e0e0;
    border-top: 3px solid #ff0000;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.youtube-content input {
    width: 100%;
    max-width: 300px;
    padding: 10px;
    margin: 15px auto;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    display: block;
    outline: none;
    transition: border-color 0.3s ease;
    -webkit-appearance: none;
    touch-action: auto;
}

.youtube-content input:focus {
    border-color: #ff0000;
}

#error-box.hidden {
    display: none;
}

.error-cross {
    display: block;
    color: #606060;
    font-size: 32px;
    margin-bottom: 10px;
}

#error-box .youtube-content h2 {
    color: #606060;
}

#error-box .youtube-content p {
    color: #606060;
}

#error-box .instruction a {
    color: #ff0000;
}

#reference-link {
    position: fixed;
    bottom: 10px;
    right: 10px;
    color: rgba(255, 255, 255, 0.3);
    font-size: 12px;
    text-decoration: none;
    z-index: 5;
    display: none;
}

#reference-link:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
}

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