.editorial-header{border-bottom:1px solid var(--border-line);padding-bottom:24px}.meta-row{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-muted);margin-bottom:14px;flex-wrap:wrap}.crumb{color:var(--text-muted);text-decoration:none}.crumb:hover{color:var(--text-main)}.pill{font-size:12px;padding:3px 10px;border-radius:999px;border:1px solid var(--border-line);background:var(--bg-surface);text-decoration:none;color:var(--text-muted)}.pill-green{background:var(--sage-bg);border-color:var(--sage-border);color:var(--sage);font-weight:600}.problem-heading{font-family:var(--font-display);font-size:32px;font-weight:600;letter-spacing:-.02em;line-height:1.25;margin:0 0 12px}.problem-intro{font-size:16px;color:#44403c;max-width:760px;margin:0;line-height:1.7}.article-wrap{background:var(--bg-surface);border:1px solid var(--border-line);border-radius:12px;padding:28px 32px;display:flex;flex-direction:column;gap:16px}.article-title{font-family:var(--font-display);font-size:22px;font-weight:600;margin:0;border-bottom:1px solid var(--border-line);padding-bottom:10px}.prose-content{font-size:15px;color:#44403c;line-height:1.8;display:flex;flex-direction:column;gap:14px}.prose-content p{margin:0}.prose-content ul,.prose-content ol{margin:0;padding-left:1.2rem}.prose-content li+li{margin-top:.35em}.prose-content h2{font-family:var(--font-display);font-size:22px;font-weight:600;letter-spacing:-.01em;margin:10px 0 0;color:var(--text-main)}.prose-content h3{font-family:var(--font-display);font-size:18px;font-weight:600;margin:6px 0 0;color:var(--text-main)}.prose-content a{color:var(--sage);text-decoration:underline;text-underline-offset:2px}.prose-content strong{color:var(--text-main);font-weight:600}.prose-content hr{border:0;border-top:1px solid var(--border-line);margin:8px 0}.prose-content pre{margin:0;font-family:var(--font-mono);font-size:12.5px;line-height:1.55;background:#f7f6f2;border:1px solid var(--border-line);border-radius:8px;padding:14px 16px;overflow-x:auto}.prose-content pre code{background:transparent;padding:0;border-radius:0;font-size:inherit}.prose-content table{width:100%;border-collapse:collapse;font-size:14px;overflow-x:auto;display:block}.prose-content th,.prose-content td{border:1px solid var(--border-line);padding:8px 10px;text-align:left;vertical-align:top}.prose-content th{background:#f7f6f2;font-weight:600;color:var(--text-main)}.prose-content blockquote{margin:0;border-left:3px solid var(--sage);background:#f7faf7;padding:12px 16px;border-radius:0 6px 6px 0;color:#57534e}.formula-box{font-family:var(--font-mono);font-size:13px;background:#f7f6f2;border:1px solid var(--border-line);border-radius:8px;padding:14px 16px;overflow-x:auto}.callout{border-left:3px solid var(--sage);background:#f7faf7;padding:14px 18px;border-radius:0 6px 6px 0;font-size:14px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.info-card{border:1px solid var(--border-line);border-radius:8px;padding:16px;background:#faf9f6}.info-card h3{font-size:14px;font-weight:600;margin:0 0 8px}.info-card p{margin:0;font-size:13px;color:var(--text-muted);line-height:1.6}.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.cta-link{color:var(--sage);font-weight:600;text-decoration:none}.cta-link:hover{text-decoration:underline}.faq-list{display:flex;flex-direction:column;gap:8px}.faq-item{border:1px solid var(--border-line);border-radius:8px;background:#faf9f6;padding:0 14px}.faq-item summary{cursor:pointer;font-weight:600;font-size:14px;padding:12px 0;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:before{content:"+ ";color:var(--sage);font-family:var(--font-mono)}.faq-item[open] summary:before{content:"− "}.faq-item p{margin:0 0 14px;font-size:14px;color:#57534e;line-height:1.7}.hint-list{margin:0;padding-left:1.2rem;font-size:14px;color:#44403c;line-height:1.8}.practice-workspace{padding-top:24px;gap:20px;max-width:1080px}.practice-page-header{padding-bottom:8px;border-bottom:none}.practice-page-header .meta-row{margin-bottom:0}.sr-only,.seo-static-hints{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.term-out{background:#e8f8ff;border-radius:3px;padding:1px 4px}.term-in{background:#f3f3f3;border-radius:3px;padding:1px 4px}.arg-list{display:flex;flex-direction:column;gap:12px}.arg-card{border:1px solid var(--border-line);border-radius:10px;background:#faf9f6;padding:16px 20px;display:flex;flex-direction:column;gap:8px}.arg-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.arg-title-group{display:flex;align-items:center;gap:10px}.arg-num{font-family:var(--font-mono);font-size:12px;color:var(--text-muted);width:20px;height:20px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;border:1px solid var(--border-line);background:var(--bg-surface)}.arg-name{font-family:var(--font-mono);font-size:14px;font-weight:600;color:#1c1917}.arg-badge{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;padding:2px 8px;border-radius:4px}.arg-badge-req{background:var(--sage-bg);border:1px solid var(--sage-border);color:var(--sage)}.arg-badge-opt{background:#f3f2ee;border:1px solid var(--border-line);color:var(--text-muted)}.arg-desc{font-size:14px;color:#44403c;line-height:1.6;margin:0}.arg-options{margin:4px 0 0;padding-left:1.2rem;font-size:13px;color:#57534e;line-height:1.6}.arg-options code{font-family:var(--font-mono);font-size:12px;background:#eeebe3;padding:1px 4px;border-radius:3px}.practice-embed-box{border:1px solid var(--border-line);border-radius:12px;background:var(--bg-surface);overflow:hidden;display:flex;flex-direction:column}.practice-embed-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 24px;background:#faf9f6;border-bottom:1px solid var(--border-line);flex-wrap:wrap}.practice-embed-header h2{font-family:var(--font-display);font-size:20px;font-weight:600;margin:0 0 4px;color:var(--text-main)}.practice-embed-sub{margin:0;font-size:14px;color:var(--text-muted)}.open-full-btn{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--sage);background:#edf7ee;border:1px solid #d4edd6;padding:8px 14px;border-radius:6px;text-decoration:none;white-space:nowrap;transition:all .15s ease}.open-full-btn:hover{background:#e1f2e3;border-color:#bfe5c2;text-decoration:none}.related-practice-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.practice-card{display:flex;flex-direction:column;text-decoration:none;border:1px solid var(--border-line);border-radius:12px;padding:18px 20px;background:var(--bg-surface);transition:border-color .15s ease,box-shadow .15s ease}.practice-card:hover{border-color:var(--sage-border);box-shadow:0 4px 12px #0000000a}.practice-card h3{font-family:var(--font-display);font-size:18px;margin:0 0 8px;color:var(--text-main);line-height:1.35}.practice-card p{margin:0;color:#57534e;font-size:13px;line-height:1.6}.practice-card code{font-family:var(--font-mono);font-size:12px;background:#f0eee6;padding:1px 4px;border-radius:3px}@media (max-width: 768px){.problem-heading{font-size:26px}.article-wrap{padding:20px}.grid-2{grid-template-columns:1fr}}