body {
    background: rgb(240,255,255);
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
}
.calib-bg {
    /* Remove background color to match body background */
    background: transparent;
    border-radius: 16px;
    margin: 30px auto;
    max-width: 900px;
    padding: 32px 32px 24px 32px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.07);
}
.calib-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #222;
}
.calib-desc {
    text-align: center;
    color: #444;
    font-size: 1.1rem;
    margin-bottom: 30px;
}
.calib-rects-row {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: flex-start;
    margin-bottom: 30px;
}
.calib-rect-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.calib-rect-label {
    font-weight: 600;
    margin-bottom: 6px;
    color: #d32f2f;
}
.calib-rect-col:last-child .calib-rect-label {
    color: #0288d1;
}
.calib-rect {
    border-radius: 8px;
    /* Remove the border from the color rectangles */
    border: none;
    margin-bottom: 10px;
}
.calib-sliders {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 210px;
}
.calib-sliders label {
    display: flex;
    align-items: center;
    font-size: 1rem;
    color: #333;
    gap: 8px;
}
.calib-sliders input[type=range] {
    flex: 1;
    margin: 0 8px;
}
.calib-bg-row {
    margin: 30px 0 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.calib-bg-label {
    font-weight: 600;
    color: #666;
    margin-bottom: 8px;
}
.calib-bg-rect {
    border-radius: 8px;
    border: 2px solid #bbb;
    margin-bottom: 10px;
}
.calib-bg-sliders {
    width: 420px;
}
.calib-btn-row {
    display: flex;
    justify-content: flex-end;
    gap: 18px;
    margin-top: 18px;
}
.calib-btn {
    font-size: 1.1rem;
    padding: 8px 22px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
}
.calib-btn-primary {
    background: #00bcd4;
    color: #fff;
}
.calib-btn-primary:hover {
    background: #0097a7;
}
.calib-btn-secondary {
    background: #fff3e0;
    color: #ff7043;
    border: 1px solid #ff7043;
}
.calib-btn-secondary:hover {
    background: #ffe0b2;
}