.case-head .lede { max-width: 62ch; }
.case-head h1 { font-size: clamp(36px, 5vw, 64px); max-width: 20ch; }
.case-byline {
    margin: 24px 0; font-family: var(--font-mono);
    font-size: 12px; color: var(--ink-2);
}
.case-intro { max-width: 760px; }
.case-head .case-intro .lede { max-width: none; }
.case-intro .lede + .lede { margin-top: 18px; }
.case-cover { margin: 40px 0 0; }
.case-cover img {
    display: block; width: 100%; height: auto;
    border-radius: var(--radius); background: #1f2b3c;
}

.case-status {
    display: inline-block; margin-top: 22px;
    padding: 6px 12px;
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--ink-2); background: var(--accent-soft);
    border: 1px solid var(--rule); border-radius: 999px;
}

.case-body {
    display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 48px;
    max-width: var(--maxw); margin: 0 auto;
    padding: 0 var(--pad) 80px;
}
.case-content { min-width: 0; max-width: 760px; }
.case-toc {
    position: sticky; top: 88px; align-self: start; margin-top: 48px;
    display: flex; flex-direction: column; gap: 2px;
    max-height: calc(100dvh - 112px); overflow-y: auto;
    padding-left: 16px; margin-left: -16px;
    font-family: var(--font-mono); font-size: 11px; line-height: 1.6;
}
.case-toc .toc-item:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.case-section { max-width: 760px; padding-bottom: 8px; }
.case-section h2 {
    scroll-margin-top: 100px;
    margin: 48px 0 24px; padding-bottom: 16px;
    border-bottom: 1px solid var(--rule);
    font-family: var(--font-display); font-size: 28px; font-weight: 500; letter-spacing: -0.02em;
}
.case-section p, .case-outcomes li { font-size: 16px; line-height: 1.75; color: var(--ink-2); }
.case-section p + p { margin-top: 18px; }
.case-subheading {
    margin: 28px 0 12px;
    font-size: 19px; font-weight: 500; letter-spacing: -0.01em;
}
.case-section-group { margin-top: 56px; }
.case-section-group h2 { margin-top: 16px; }
.case-outcomes { list-style: none; padding: 0; margin: 0; }
.case-outcomes li { padding: 18px 0; border-bottom: 1px solid var(--rule); }
.case-outcomes li:first-child { padding-top: 0; }
.case-outcomes li:last-child { border-bottom: 0; padding-bottom: 0; }
.case-outcomes strong { color: var(--ink); font-weight: 500; }
.case-section p + .case-outcomes { margin-top: 24px; }

/* Before/after flow diagram: one lane per row, steps joined by arrows. */
.case-diagram { margin: 28px 0 8px; display: grid; gap: 12px; }
.cd-lane {
    padding: 16px 18px; border: 1px solid var(--rule); border-radius: var(--radius);
    background: var(--bg-2);
}
.cd-label {
    margin-bottom: 12px; font-family: var(--font-mono); font-size: 11px;
    letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3);
}
.cd-steps {
    list-style: none; padding: 0; margin: 0;
    display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px 28px;
}
.cd-steps li {
    position: relative; flex: 1 1 0; min-width: 0;
    padding: 10px 12px; border: 1px solid var(--rule); border-radius: 6px;
    background: var(--bg); font-size: 13px; line-height: 1.4; color: var(--ink);
}
.cd-steps li + li::before {
    content: "→"; position: absolute; left: -21px; top: 50%; transform: translateY(-50%);
    color: var(--ink-3); font-size: 14px;
}
.cd-after .cd-steps li { border-color: var(--accent); background: var(--accent-soft); }
.cd-loop { margin-top: 12px; font-size: 13px; line-height: 1.5; color: var(--ink-2); }
.cd-loop span { color: var(--ink-3); }
.case-diagram figcaption { font-size: 13px; line-height: 1.5; color: var(--ink-3); }

.case-covers { list-style: none; padding: 0; margin: 0; }
.case-covers li {
    position: relative; padding: 0 0 14px 22px;
    font-size: 15px; line-height: 1.6; color: var(--ink-2);
}
.case-covers li::before {
    content: ""; position: absolute; left: 0; top: 0.7em;
    width: 10px; height: 1px; background: var(--ink-3);
}

.case-outline { list-style: none; padding: 0; margin: 0; }
.case-outline li {
    display: grid; grid-template-columns: 48px 1fr; gap: 12px;
    padding: 16px 0; border-bottom: 1px solid var(--rule);
}
.case-outline li:last-child { border-bottom: 0; }
.case-outline .n { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); padding-top: 4px; }
.case-outline h3 { font-size: 17px; font-weight: 500; letter-spacing: -0.01em; }
.case-outline p { margin-top: 4px; font-size: 14px; color: var(--ink-2); line-height: 1.5; }

.case-note { margin-top: 16px; font-size: 13px; color: var(--ink-3); }

.case-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; }

@media (max-width: 900px) {
    .case-body { grid-template-columns: minmax(0, 1fr); gap: 0; }
    .case-toc {
        position: static; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0 20px; max-height: none; overflow: visible;
        margin: 16px 0 0; padding: 0 0 16px; border-bottom: 1px solid var(--rule);
    }
    .case-toc .toc-item { margin-left: 0; padding: 10px 0 10px 12px; }
}

@media (max-width: 560px) {
    .case-section h2 { font-size: 24px; margin-top: 36px; }
    .case-outline li { grid-template-columns: 36px 1fr; }
    .cd-steps { flex-direction: column; gap: 22px; }
    .cd-steps li + li::before { content: "↓"; left: 14px; top: -19px; transform: none; }
    .case-section-group { margin-top: 40px; }
    .case-section-group h2 { margin-top: 16px; }
}