body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
}

h1 {
    margin: 20px 0;
}

.controls {
    margin: 10px;
}

.event-inputs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.event-inputs input[type="text"],
.event-inputs input[type="date"] {
    padding: 5px;
    font-size: 16px;
}

.timeline {
    width: 80%;
    position: relative;
}

.event {
    margin: 10px 0;
    background-color: white;
    padding: 10px;
    border-left: 5px solid #3498db;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    width: 100%;
    height: 20px;
    background-color: #ddd;
    margin-bottom: 20px;
    border-radius: 10px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: #3498db;
    width: 0;
    transition: width 0.5s ease-in-out;
}