.product-description-content .study-section,
.study-section {
    padding: 64px 0;
    background:
        radial-gradient(circle at 90% 10%, rgba(51, 189, 213, 0.16), transparent 26%),
        linear-gradient(135deg, #eaf8fc 0%, #f8fdff 100%);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.study-wrap {
    display: grid;
    gap: 28px;
}

.study-copy {
    max-width: 620px;
}

.study-copy h2 {
    margin-bottom: 14px;
}

.study-copy p {
    color: var(--text-muted);
    font-size: 16px;
}

.study-note {
    margin-top: 16px;
    padding: 13px 14px;
    border: 1px solid #bfe7ef;
    border-radius: 15px;
    background: #fff;
    color: var(--text-muted) !important;
    font-size: 13px !important;
}

.study-bars {
    display: grid;
    gap: 16px;
}

.study-item {
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow-small);
}

.study-label {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 10px;
}

.study-label span {
    color: var(--navy);
    font-size: 14px;
    line-height: 1.4;
    font-weight: 800;
}

.study-label strong {
    flex: 0 0 auto;
    color: var(--brand);
    font-size: 24px;
    line-height: 1;
    font-weight: 950;
}

.study-track {
    position: relative;
    height: 13px;
    overflow: hidden;
    border-radius: 999px;
    background: #dceef4;
}

.study-progress {
    --progress: 0%;
    position: absolute;
    inset: 0 auto 0 0;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--brand), var(--accent));
    box-shadow: 0 0 18px rgba(51, 189, 213, 0.28);
    transition: width 900ms cubic-bezier(.2,.75,.25,1);
}

.study-progress.is-visible {
    width: var(--progress);
}

.study-placeholder {
    padding: 22px;
    border: 1px dashed var(--border-strong);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--text-muted);
    font-size: 14px;
}

.study-placeholder code {
    padding: 2px 6px;
    border-radius: 7px;
    background: var(--brand-soft);
    color: var(--navy);
    font-size: 13px;
}

.placeholder-bars {
    display: grid;
    gap: 10px;
    margin-bottom: 14px;
}

.placeholder-bars span {
    display: block;
    height: 12px;
    border-radius: 999px;
    background: linear-gradient(90deg, #dceef4, #edf8fb, #dceef4);
    background-size: 200% 100%;
    animation: study-shimmer 1.5s linear infinite;
}

.placeholder-bars .bar-one {
    width: 88%;
}

.placeholder-bars .bar-two {
    width: 72%;
}

.placeholder-bars .bar-three {
    width: 81%;
}

@keyframes study-shimmer {
    to {
        background-position: -200% 0;
    }
}

@media (min-width: 768px) {
    .product-description-content .study-section,
    .study-section {
        padding: 86px 0;
    }

    .study-wrap {
        grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
        align-items: start;
        gap: 52px;
    }

    .study-bars {
        gap: 18px;
    }

    .study-item {
        padding: 20px;
    }
}

@media (min-width: 1280px) {
    .product-description-content .study-section,
    .study-section {
        padding: 108px 0;
    }

    .study-wrap {
        gap: 76px;
    }

    .study-label span {
        font-size: 15px;
    }
}