.time-controls {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 600px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    padding: 15px 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 10;
}

.timeline-slider {
    width: 100%;
    height: 8px;
    -webkit-appearance: none;
    background: linear-gradient(90deg, #6e44ff, #00f7ff);
    border-radius: 4px;
    outline: none;
    margin: 10px 0;
    cursor: pointer;
}

.timeline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #f0f4ff;
    border: 4px solid #6e44ff;
    cursor: pointer;
    box-shadow: 0 0 15px rgba(0, 247, 255, 0.5);
    transition: all 0.2s;
}

.year-display {
    display: flex;
    justify-content: space-between;
    color: #f0f4ff;
    font-size: 0.9rem;
    margin-top: 5px;
}

#currentYear {
    font-size: 1.5rem;
    font-weight: bold;
    text-align: center;
    color: #00f7ff;
    text-shadow: 0 0 10px rgba(0, 247, 255, 0.5);
    margin-top: 5px;
}