article.single-treatment {
    padding: var(--space-xl) 0 var(--space-xl);
    background: #FAFAF8;
    min-height: 80vh;
}

article.single-treatment .container {
    display: grid;
    gap: var(--space-lg);
}

.single-treatment-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.single-treatment-tools a,
.single-treatment-tools button {
    background: transparent;
    border: 0;
    color: var(--color-text-muted);
    cursor: pointer;
    font: inherit;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.10em;
    text-decoration: none;
    text-transform: uppercase;
    padding: 0;
    transition: color var(--transition);
}

.single-treatment-tools a:hover,
.single-treatment-tools button:hover { color: var(--color-text); }

.single-treatment-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    align-items: start;
    border: 1px solid var(--color-border);
    background: #fff;
}

.single-treatment-content {
    border-right: 1px solid var(--color-border);
    min-width: 0;
}

.single-treatment-intro {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.single-treatment-kicker {
    display: block;
    margin-bottom: var(--space-md);
    color: var(--color-gold);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.20em;
    text-transform: uppercase;
}

.single-treatment-intro h1 {
    margin: 0 0 var(--space-md);
    font-size: clamp(36px, 4vw, 62px);
    line-height: 1.02;
    letter-spacing: -0.03em;
    font-weight: 400;
}

.single-treatment-intro > p {
    max-width: 54ch;
    color: var(--color-text-muted);
    font-size: 15px;
    line-height: 1.72;
    margin: 0;
}

.single-treatment-main {
    padding: var(--space-xl);
}

.single-treatment-diagnostic {
    display: grid;
    gap: 0;
}

.single-treatment-diagnostic > div {
    display: grid;
    grid-template-columns: 60px minmax(0, 1fr);
    column-gap: var(--space-lg);
    row-gap: var(--space-xs);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.single-treatment-diagnostic > div:first-child { padding-top: 0; }
.single-treatment-diagnostic > div:last-child  { border-bottom: 0; padding-bottom: 0; }

.single-treatment-diagnostic > div > span {
    grid-row: 1 / span 2;
    align-self: start;
    color: var(--color-text);
    font-family: var(--font-serif);
    font-size: 44px;
    font-weight: 400;
    letter-spacing: -0.05em;
    line-height: 1;
    opacity: 0.10;
}

.single-treatment-diagnostic h2 {
    align-self: end;
    margin: 0;
    color: var(--color-text);
    font-family: var(--font-serif);
    font-size: 21px;
    font-weight: 400;
    line-height: 1.15;
}

.single-treatment-diagnostic p {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.75;
}

.single-treatment-figure figcaption a:hover {
    color: var(--color-text);
}

.single-treatment-side {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    position: sticky;
    top: var(--header-height, 90px);
    align-self: start;
    background: #FAFAF8;
}

.single-treatment-block {
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.single-treatment-block:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.single-treatment-block > span:first-child {
    color: var(--color-gold);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.20em;
    text-transform: uppercase;
}

.single-treatment-block > strong {
    color: var(--color-text);
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 400;
    line-height: 1.4;
}

.single-treatment-tool-links {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.single-treatment-tool-links a {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-text-muted);
    font-size: 11px;
    text-decoration: none;
    transition: border-color var(--transition), color var(--transition);
}

.single-treatment-tool-links a:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

@media (max-width: 1100px) {
    .single-treatment-layout { grid-template-columns: 1fr 240px; }
}

@media (max-width: 860px) {
    .single-treatment-layout { grid-template-columns: 1fr; }
    .single-treatment-content { border-right: 0; }
    .single-treatment-side {
        position: static;
        border-top: 1px solid var(--color-border);
    }
}

@media (max-width: 640px) {
    .single-treatment-intro,
    .single-treatment-main,
    .single-treatment-side { padding: var(--space-lg) var(--space-md); }
    .single-treatment-diagnostic > div { grid-template-columns: 1fr; }
    .single-treatment-diagnostic > div > span { display: none; }
}

@media print {
    .site-header, .site-footer, .single-treatment-tools { display: none; }
    article.single-treatment { padding: 0; background: #fff; }
    .single-treatment-layout { border: 0; grid-template-columns: 1fr 220px; }
    .single-treatment-side { position: static; }
}