/* General Resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
}

/* Breathing Tool Container */
.circle-container {
    width: 288px;
    height: 432px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* The Animated Circle */
.circle {
    width: 288px;
    height: 288px;
    border-radius: 50%;
    opacity: 0.85;
    background-color: #3b82f6; /* Tailwind Blue 500 */
    position: absolute;
    transform: scale(1);
    z-index: 1;
    /* Transition times are injected via JS based on selected level */
    transition: transform 4s ease-in-out, background-color 4s ease-in-out;
}

/* The Text Inside The Circle */
#breathingText {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    text-align: center;
    z-index: 10;
    font-size: 2.25rem;
    color: #ffffff;
    text-shadow: 0px 2px 8px rgba(0, 0, 0, 0.4);
    letter-spacing: 0.05em;
    pointer-events: none;
}

/* Media Query for smaller screens if necessary, but 288px base width fits most phones */
@media (max-width: 400px) {
    .circle-container {
        width: 240px;
        height: 360px;
    }
    .circle {
        width: 240px;
        height: 240px;
    }
}