.plan-details-back {
    align-items: center;
    border-radius: .25rem;
    color: #4b5563;
    display: inline-flex;
    gap: .45rem;
    margin-bottom: 1.5rem;
    padding: .25rem 0;
    text-decoration: none;
}

.plan-details-back:hover {
    color: #111827;
    text-decoration: underline;
    text-underline-offset: .2em;
}

.plan-details-back:focus-visible {
    outline: 2px solid #6b7280;
    outline-offset: 3px;
}

.plan-details-page {
    --plan-details-bg: #ffffff;
    --plan-details-text: #111827;
    --plan-details-muted: #374151;
    --plan-details-border: #d1d5db;
    min-height: 100vh;
    margin: 0 auto;
    max-width: 920px;
    padding: clamp(1.25rem, 3vw, 2.25rem) clamp(1rem, 4vw, 2.5rem);
    background: var(--plan-details-bg);
    color: var(--plan-details-text);
}

.plan-details-intro {
    margin-bottom: 2.5rem;
    max-width: 68ch;
}

.plan-details-back--bottom {
    margin: 2rem 0 0;
}

.plan-details-intro h1 {
    color: var(--plan-details-text);
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -.035em;
    line-height: 1.12;
    margin: .45rem 0 .9rem;
}

.plan-details-intro p,
.plan-details-empty {
    color: var(--plan-details-muted);
    font-size: 1.05rem;
    line-height: 1.7;
    margin: 0;
}

.plan-details-plan {
    border-top: 1px solid var(--plan-details-border);
    padding: 2rem 0 1.5rem;
}

.plan-details-plan > h2 {
    color: var(--plan-details-text);
    font-size: clamp(1.6rem, 4vw, 2.1rem);
    letter-spacing: -.02em;
    margin: 0 0 1.5rem;
}

.plan-details-plan-summary {
    color: var(--plan-details-muted);
    line-height: 1.65;
    margin: -.7rem 0 1.35rem;
    max-width: 70ch;
}

.plan-details-group {
    margin: 1.6rem 0 0;
}

.plan-details-group h3 {
    color: var(--plan-details-text);
    font-size: 1.08rem;
    font-weight: 700;
    margin: 0 0 .4rem;
}

.plan-details-group dl {
    margin: 0;
}

.plan-details-resource {
    border-bottom: 1px solid var(--plan-details-border);
    padding: .9rem 0;
}

.plan-details-resource dt {
    color: var(--plan-details-text);
    font-size: .98rem;
    font-weight: 650;
    margin-bottom: .2rem;
}

.plan-details-resource dd {
    color: var(--plan-details-muted);
    line-height: 1.65;
    margin: 0;
    max-width: 75ch;
}

@media (max-width: 575.98px) {
    .plan-details-intro { margin-bottom: 1.75rem; }
    .plan-details-plan { padding-top: 1.5rem; }
}