.countdown-content-container {
    margin: 30px 0;
    /* padding: 20px; */
    background-color: #f5f5f5;
    border-left: 4px solid #2271b1;
    border-radius: 4px;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.countdown-message {
    font-size: 16px;
    color: #3c434a;
    margin-bottom: 15px;
}

.countdown-display {
    font-size: 28px;
    font-weight: bold;
    color: #f52929;
    margin: 0 5px;
}

.progress-container {
    height: 6px;
    background-color: #e0e0e0;
    border-radius: 3px;
    margin: 15px auto;
    max-width: 300px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background-color: #2271b1;
    transition: width 0.5s ease;
}

.waiting-text {
    font-size: 14px;
    color: #666;
    margin: 5px 0;
}

.hidden-content {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.8s ease;
}

.hidden-content.show {
    max-height: 1000px;
    opacity: 1;
}

.content-box {
    /* background: white; */
    padding: 10px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    /* text-align: left; */
}

.restart-btn {
    background-color: #2271b1;
    color: white;
    /* border-radius: 13px; */
    border: none;
    padding: 8px 16px;
    border-radius: 18px;
    cursor: pointer;
    font-size: 14px;
    margin-top: 15px;
    transition: background-color 0.2s;
}

.restart-btn:hover {
    background-color: #135e96;
}

@media (max-width: 600px) {
    .countdown-display {
        font-size: 24px;
    }
}