body {
    font-family: 'Roboto', sans-serif;
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
    padding: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%23ff0000' fill-opacity='0.1'%3E%3Cpath opacity='.5' d='M96 95h4v1h-4v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4h-9v4h-1v-4H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15v-9H0v-1h15V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h9V0h1v15h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9h4v1h-4v9zm-1 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm9-10v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-10 0v-9h-9v9h9zm-9-10h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9zm10 0h9v-9h-9v9z'/%3E%3Cpath d='M6 5V0H5v5H0v1h5v94h1V6h94V5H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #ff0000;
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-style: italic;
    color: #666;
    margin-bottom: 20px;
}

.upload-section {
    margin-bottom: 20px;
}

.file-label {
    display: inline-block;
    padding: 10px 20px;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.file-label:hover {
    background-color: #45a049;
}

.file-text {
    margin-right: 10px;
}

.input {
    display: none;
}

#uploadButton {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background-color: #ff0000;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1em;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#uploadButton:hover {
    background-color: #cc0000;
    animation: shake 0.82s cubic-bezier(.36,.07,.19,.97) both;
}

.result-container {
    margin-top: 20px;
    padding: 15px;
    background-color: #f0f0f0;
    border-radius: 5px;
    font-weight: bold;
}

.fun-fact {
    margin-top: 30px;
    padding: 15px;
    background-color: #ffe6e6;
    border-radius: 5px;
    font-style: italic;
}

.fun-fact h3 {
    color: #ff0000;
    margin-bottom: 10px;
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

.time-display {
    display: flex;
    justify-content: space-around;
    margin: 20px 0;
}

.time-unit {
    text-align: center;
}

.time-value {
    font-size: 2.5em;
    font-weight: bold;
    color: #ff0000;
    display: block;
}

.time-label {
    font-size: 0.9em;
    color: #666;
}

.total-time {
    font-size: 1.2em;
    font-weight: bold;
    margin: 20px 0;
}

.fun-fact {
    font-style: italic;
    background-color: #ffe6e6;
    padding: 10px;
    border-radius: 5px;
    margin-top: 20px;
}

.loading-bar {
    width: 100%;
    height: 20px;
    background-color: #f0f0f0;
    border-radius: 10px;
    overflow: hidden;
    margin-top: 20px;
    position: relative;
}

.loading-progress {
    width: 0;
    height: 100%;
    background-color: #ff0000;
    transition: width 0.5s ease-in-out;
}

.loading-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #333;
    font-size: 0.9em;
}

.date-range {
    background-color: #f0f0f0;
    border-radius: 5px;
    padding: 10px;
    margin-bottom: 20px;
    text-align: center;
}

.date-range p {
    margin: 5px 0;
    font-size: 0.9em;
    color: #666;
}

.file-name-display {
    margin-top: 10px;
    font-size: 0.9em;
    color: #666;
    font-style: italic;
}

#uploadButton:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#uploadButton:disabled:hover {
    background-color: #cccccc;
    animation: none;
}

.fun-fact-section {
    margin-top: 20px;
    text-align: center;
}

.new-fact-button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px 20px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 10px 2px;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.new-fact-button:hover {
    background-color: #45a049;
}

.tutorial-section {
    margin: 2rem 0;
    padding: 1rem;
    padding-bottom: 0;
    padding-top: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.tutorial-section h2 {
    color: #fff;
    margin-bottom: 1rem;
}

.tutorial-section p {
    margin: 0.5rem 0;
}

.tutorial-section a {
    color: #ff0000;
    text-decoration: none;
}

.tutorial-section a:hover {
    text-decoration: underline;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    margin: 1.5rem 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 8px;
}