.back-link {
    display: inline-block;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    text-decoration: none;
    margin-bottom: 1rem;
}

.back-link:hover {
    color: var(--color-white);
}

.piece-header {
    padding-top: calc(var(--nav-height) + 2rem);
    padding-bottom: 1rem;
}

.piece-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    color: var(--color-white);
    margin-bottom: 0.75rem;
}

.subtitle {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    max-width: 680px;
}

#chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem 0 3rem;
}

#chart svg {
    max-width: 100%;
    height: auto;
}

.label {
    pointer-events: none;
    font-size: 11px;
    fill: #333;
    font-weight: 500;
}

.label--theory {
    font-weight: 700;
    font-size: 9px;
}

.label--book {
    font-size: 9.5px;
    font-weight: 400;
    fill: #555;
}

.breadcrumb {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    height: 1.4em;
}

.breadcrumb span {
    color: var(--color-accent);
}