/* Dedicated case fishbone styles. All rules are scoped to the D4 module. */
.d4c { --d4c-bg: var(--surface, #121215); --d4c-ink: var(--ink, #f4f4f5); --d4c-muted: var(--muted, #d4d4d8); --d4c-line: var(--line, #27272a); --d4c-soft: var(--surface-soft, #121215); color: var(--d4c-ink); background: var(--d4c-bg); border: 1px solid var(--d4c-line); border-radius: 16px; padding: clamp(16px, 2.3vw, 28px); margin: 20px 0; min-width: 0; }
.d4c *, .d4c *::before, .d4c *::after { box-sizing: border-box; }
.d4c .d4c-heading, .d4c .d4c-toolbar, .d4c .d4c-inspector-heading, .d4c .d4c-branch-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.d4c .d4c-heading { align-items: flex-start; margin-bottom: 18px; }
.d4c .d4c-eyebrow { font-size: 10px; font-weight: 800; letter-spacing: .13em; color: var(--accent-ink, #34d399); margin: 0 0 7px; }
.d4c h3 { font-size: clamp(19px, 2vw, 24px); letter-spacing: -.035em; line-height: 1.25; margin: 0; }
.d4c h4 { font-size: 14px; line-height: 1.45; margin: 0; }
.d4c h5 { font-size: 12px; margin: 0 0 10px; }
.d4c .d4c-total { flex-shrink: 0; font-size: 11px; color: var(--d4c-muted); border: 1px solid var(--d4c-line); border-radius: 20px; padding: 5px 9px; }
.d4c .d4c-toolbar { flex-wrap: wrap; }
.d4c .d4c-legend { display: flex; flex-wrap: wrap; gap: 7px; }
.d4c .d4c-status { display: inline-flex; align-items: center; gap: 5px; font-size: 10px; font-weight: 650; line-height: 1.4; border-radius: 12px; padding: 3px 7px; white-space: normal; }
.d4c .d4c-status::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; flex-shrink: 0; }
.d4c .d4c-status-hypothesis { color: var(--blue-ink, #fbbf24); background: var(--blue-soft, rgba(245, 158, 11, 0.12)); }
.d4c .d4c-status-pending { color: var(--warning-ink, #fbbf24); background: var(--warning-soft, rgba(245, 158, 11, 0.12)); }
.d4c .d4c-status-refuted { color: var(--danger-ink, #991b1b); background: var(--danger-soft, rgba(255, 26, 92, 0.12)); }
.d4c .d4c-status-verified { color: var(--success-ink, #34d399); background: var(--success-soft, rgba(16, 185, 129, 0.12)); }
.d4c .d4c-button { font: inherit; font-size: 12px; font-weight: 600; padding: 8px 11px; min-height: 36px; color: var(--d4c-ink); border: 1px solid var(--d4c-line); background: var(--d4c-bg); border-radius: 7px; cursor: pointer; line-height: 1.4; }
.d4c .d4c-button:hover:not(:disabled) { border-color: var(--accent, #10b981); background: var(--accent-soft, rgba(16, 185, 129, 0.12)); }
.d4c .d4c-button:disabled { opacity: .5; cursor: not-allowed; }
.d4c .d4c-save { background: var(--accent-fill, #059669); color: #f4f4f5; border-color: transparent; }
.d4c .d4c-save:hover:not(:disabled) { background: var(--accent-fill-hover, #059669); color: #f4f4f5; }
.d4c .d4c-notice, .d4c .d4c-unlinked { font-size: 11px; line-height: 1.6; color: var(--d4c-muted); margin: 12px 0 18px; }
.d4c .d4c-unlinked { color: var(--warning-ink, #fbbf24); }
.d4c .d4c-viewport { max-width: 100%; overflow-x: auto; border: 1px solid var(--d4c-line); border-radius: 12px; background: var(--d4c-soft); }
.d4c .d4c-diagram { min-width: 700px; padding: 20px; }
.d4c .d4c-branches { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px; align-items: start; }
.d4c .d4c-branch { min-width: 0; }
.d4c .d4c-branch-heading { padding-bottom: 10px; border-bottom: 2px solid var(--d4c-line); margin-bottom: 12px; }
.d4c .d4c-branch-occurrence .d4c-branch-heading { border-color: var(--accent, #10b981); }
.d4c .d4c-branch-escape .d4c-branch-heading { border-color: #f59e0b; }
.d4c .d4c-branch-systemic .d4c-branch-heading { border-color: #52525b; }
.d4c .d4c-branch-count { font-size: 11px; color: var(--d4c-muted); }
.d4c .d4c-nodes { display: flex; flex-direction: column; gap: 9px; }
.d4c .d4c-cause { width: 100%; display: flex; flex-direction: column; align-items: stretch; gap: 9px; text-align: left; padding: 12px; background: var(--d4c-bg); border-radius: 9px; font-weight: 400; box-shadow: 0 2px 4px rgb(9 9 11 / 3%); }
.d4c .d4c-cause[aria-pressed="true"] { border-color: var(--accent, #10b981); box-shadow: 0 0 0 1px var(--accent, #10b981); }
.d4c .d4c-cause-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px; }
.d4c .d4c-cause-id { font-size: 11px; letter-spacing: .02em; overflow-wrap: anywhere; }
.d4c .d4c-cause-text { font-size: 12px; line-height: 1.65; overflow-wrap: anywhere; white-space: pre-wrap; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.d4c .d4c-cause-meta { font-size: 10px; color: var(--d4c-muted); }
.d4c .d4c-add { display: block; margin: 10px 0 0; width: 100%; background: transparent; border-style: dashed; color: var(--d4c-muted); }
.d4c .d4c-empty-branch { font-size: 12px; color: var(--d4c-muted); line-height: 1.6; min-height: 74px; padding: 12px; }
.d4c .d4c-rail { height: 76px; }
.d4c .d4c-rail svg { width: 100%; height: 100%; overflow: visible; }
.d4c .d4c-rail path { fill: none; stroke: var(--accent, #34d399); stroke-width: 2; vector-effect: non-scaling-stroke; stroke-linecap: round; stroke-linejoin: round; opacity: .6; }
.d4c .d4c-problem { border: 1px solid var(--accent-line, #3f3f46); border-radius: 8px; padding: 12px 15px; background: var(--d4c-bg); margin-left: 12%; }
.d4c .d4c-problem strong { font-size: 10px; letter-spacing: .03em; color: var(--accent-ink, #34d399); }
.d4c .d4c-problem p { font-size: 12px; line-height: 1.7; margin: 5px 0 0; overflow-wrap: anywhere; white-space: pre-wrap; max-height: 120px; overflow-y: auto; }
.d4c .d4c-keyboard-note { font-size: 10px; color: var(--d4c-muted); line-height: 1.6; margin: 8px 0 20px; }
.d4c .d4c-inspector { border-top: 1px solid var(--d4c-line); padding-top: 18px; }
.d4c .d4c-inspector-heading { margin-bottom: 12px; flex-wrap: wrap; }
.d4c .d4c-statement-label { display: block; font-size: 11px; font-weight: 600; line-height: 1.5; }
.d4c .d4c-statement { display: block; width: 100%; min-height: 85px; font: inherit; font-size: 12px; font-weight: 400; line-height: 1.7; padding: 10px 12px; margin-top: 6px; resize: vertical; border: 1px solid var(--d4c-line); border-radius: 8px; background: var(--d4c-bg); color: var(--d4c-ink); }
.d4c .d4c-test-summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 12px 0; }
.d4c .d4c-test-summary details { border: 1px solid var(--d4c-line); border-radius: 7px; padding: 10px; font-size: 11px; }
.d4c summary { cursor: pointer; line-height: 1.6; overflow-wrap: anywhere; }
.d4c .d4c-inspector-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 18px; }
.d4c .d4c-evidence { padding: 14px; border-radius: 9px; background: var(--d4c-soft); }
.d4c .d4c-source { padding: 9px 0; border-top: 1px solid var(--d4c-line); font-size: 11px; }
.d4c .d4c-source-relation { color: var(--d4c-muted); margin-right: 8px; }
.d4c .d4c-source-locator, .d4c .d4c-derived { font-size: 11px; color: var(--d4c-muted); margin: 8px 0; overflow-wrap: anywhere; }
.d4c .d4c-source-text { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 12px; line-height: 1.7; margin: 8px 0; max-height: 220px; overflow-y: auto; }
.d4c .d4c-reasons { font-size: 11px; margin: 12px 0; }
.d4c .d4c-reasons ul { padding-left: 20px; margin-top: 8px; line-height: 1.7; }
.d4c .d4c-empty-selection, .d4c .d4c-muted { font-size: 12px; color: var(--d4c-muted); line-height: 1.7; margin: 0; }
.d4c .d4c-warning { font-size: 11px; line-height: 1.6; color: var(--warning-ink, #fbbf24); margin: 8px 0; }
.d4c :focus-visible { outline: 3px solid var(--accent, #10b981); outline-offset: 3px; }
.d4c .d4c-sr-only { position: absolute; height: 1px; width: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@media (max-width: 600px) { .d4c .d4c-test-summary { grid-template-columns: 1fr; } .d4c .d4c-toolbar { align-items: flex-start; } .d4c .d4c-heading { gap: 8px; } .d4c .d4c-status { font-size: 10px; } }
@media (prefers-reduced-motion: reduce) { .d4c *, .d4c *::before, .d4c *::after { scroll-behavior: auto !important; transition: none !important; } }

.d4c .d4c-source-locator, .d4c .d4c-source-title { white-space: pre-wrap; }