/* Introductory pages extend the existing shell without implementing steps 1–12. */
@layer components {
.intro-heading{margin-bottom:25px;max-width:980px}.intro-heading>.eyebrow{color:var(--accent);margin-bottom:13px}.intro-heading>p:last-child{color:var(--muted);max-width:780px;line-height:1.7}
.intro-heading h1{font-size:clamp(1.9rem,3vw,2.6rem)}
.intro-nav{margin-bottom:16px;padding-bottom:15px;border-bottom:1px solid #ffffff17}.intro-nav .step-link{min-height:48px}.intro-nav .nav-number{font-family:Georgia,serif;font-size:1rem;color:#a19cdc}.intro-nav .step-link[aria-current]{background:#5a1e3c;border-color:#783456}
.overview-summary{display:flex;align-items:center;gap:25px;padding:22px 25px;border:1px solid var(--line);border-radius:12px;background:white;margin-bottom:27px}.overview-number{font-family:Georgia,serif;font-size:2.5rem;line-height:1;color:#233f64;text-align:center;padding-right:25px;border-right:1px solid var(--line)}.overview-number span{display:block;font: .75rem/1.4 "Segoe UI",sans-serif;margin-top:7px;white-space:nowrap;color:var(--muted)}.overview-summary>div{flex:1}.overview-summary math{font-size:1.3rem}.overview-summary p{margin:7px 0 0;font-size:.875rem;color:var(--muted)}.text-link{font-size:.875rem;font-weight:550;color:var(--accent);text-decoration:none}.text-link:hover{text-decoration:underline}
.protocol-board{border:1px solid var(--line);border-radius:12px;background:white;overflow:hidden}.board-heading{padding:24px 25px 12px;display:flex;justify-content:space-between;align-items:center;gap:20px}.board-heading h2{margin:0 0 7px}.board-heading p{font-size:.875rem;color:var(--muted);margin:0}.flow-controls{display:flex;gap:8px;flex-shrink:0}.protocol-scroll{overflow-x:auto;padding:15px 25px 12px;scrollbar-width:thin;scrollbar-color:#bac8de #f3f6fa;scroll-snap-type:x proximity}.protocol-flow{list-style:none;padding:0;margin:0;display:flex;gap:0;width:max-content}.flow-item{display:flex;align-items:center;scroll-snap-align:start}.flow-node{width:218px;min-height:242px;display:flex;flex-direction:column;text-align:left;align-items:stretch;border:1px solid var(--tone-line);border-top:3px solid var(--tone);border-radius:9px;background:var(--tone-bg);padding:16px 14px 14px;color:var(--ink);position:relative}.flow-node:hover{filter:brightness(.98)}.flow-node[aria-pressed=true]{box-shadow:0 0 0 2px var(--tone);border-color:var(--tone)}.flow-node>strong{font-size:1rem;line-height:1.35;margin:13px 0 16px}.flow-top{display:flex;gap:9px;font-size:.7rem;line-height:1.3;align-items:center;color:var(--muted)}.flow-count{font-size:.75rem;background:#ffffffb3;border:1px solid var(--tone-line);border-radius:4px;padding:3px 5px;font-variant-numeric:tabular-nums;color:var(--tone)}.flow-symbol{margin-bottom:15px;display:block;overflow-x:auto;overflow-y:hidden;max-width:100%;flex-shrink:0;padding:4px 0 8px}.flow-symbol math{font-size:1.17rem}.flow-value{margin-top:auto;flex-shrink:0;font-size:.82rem;border-top:1px solid var(--tone-line);padding-top:10px}.flow-value math{font-size:.94rem}.flow-arrow{width:30px;text-align:center;font-size:1.25rem;color:#8899b0}.branch-tag{font-size:.67rem;color:#365c9c;margin-top:8px}
.tone-purple{--tone:#7756ac;--tone-line:#d4c5ea;--tone-bg:#f8f5fd}.tone-violet{--tone:#4338ca;--tone-line:#bebbe2;--tone-bg:#f4f3fa}.tone-blue{--tone:#406dcc;--tone-line:#bfd0ee;--tone-bg:#f3f7ff}.tone-coral{--tone:#b9515a;--tone-line:#edc4c8;--tone-bg:#fff6f7}.tone-orange{--tone:var(--palette-deeppink);--tone-line:#e2a8c5;--tone-bg:#fffaf0}.tone-ink{--tone:#314a69;--tone-line:#b9c6d7;--tone-bg:#f3f6fa}
.diagram-hint{padding:4px 25px 17px;margin:0;font-size:.75rem;color:#75869d}.protocol-detail{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:32px;background:#f9fbfe;padding:26px;border-top:1px solid var(--line);min-height:230px}.protocol-detail .eyebrow{color:var(--accent);font-size:.7rem;margin-bottom:10px}.protocol-detail h2{font-size:1.2rem;margin-bottom:9px}.protocol-detail p:not(.eyebrow){font-size:.9375rem;color:#53667f;line-height:1.7}.stage-facts{align-self:center;display:flex;flex-direction:column;gap:18px;overflow:auto}.stage-facts>div{padding:10px 0}.stage-facts math{font-size:1.12rem}
.svd-branch{display:flex;gap:22px;align-items:center;border:1px dashed #aac1e9;border-radius:12px;background:#f5f8ff;margin:25px 0;padding:25px}.branch-source{display:flex;flex-direction:column;align-items:center;gap:8px;min-width:90px}.branch-source math{font-size:1.65rem}.branch-source>span{font-size:.75rem;color:#647ba0}.branch-connector{font-size:1.3rem;color:#8ba6cf;white-space:nowrap}.svd-branch .eyebrow{color:#4f77ba;font-size:.7rem;margin-bottom:7px}.svd-branch h2{font-size:1.12rem;margin:0 0 10px}.svd-branch p:not(.eyebrow){font-size:.875rem;color:#536983;margin:10px 0;max-width:740px}.branch-equation math{font-size:1.1rem}
.overview-bottom{display:grid;grid-template-columns:1.1fr 1fr;gap:30px}.overview-bottom>section,.overview-bottom>aside{padding:22px 0}.overview-bottom .eyebrow{color:#6c7f97;font-size:.7rem}.overview-bottom p:not(.eyebrow){font-size:.875rem;color:#5d6f85;line-height:1.7}.error-ledger>div{display:flex;align-items:center;gap:18px;padding:9px 0}.error-ledger math{min-width:72px;font-size:1.1rem}.error-ledger span{font-size:.875rem;color:#52657c}
.intro-footer{margin-top:32px;border-top:1px solid var(--line);padding-top:23px;display:flex;align-items:center;justify-content:space-between;gap:18px}.intro-footer-note{font-size:.8125rem;color:#7a8b9f}
.care-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0 36px}.care-card{display:flex;align-items:flex-start;gap:14px;padding:22px;background:white;border:1px solid #cfdcf1;border-radius:10px}.care-number{font:1.4rem Georgia,serif;color:#819dc5}.care-card h2{font-size:1rem;margin:0 0 10px}.care-card p{font-size:.875rem;color:#566b85;line-height:1.7;margin:0}.care-card math{font-size:1rem}.reference-section{padding:28px 0;border-top:1px solid var(--line)}.section-heading{display:flex;align-items:center;gap:14px;margin-bottom:19px}.section-heading>span{font-size:.75rem;color:#879bb8;letter-spacing:.04em}.section-heading h2{font-size:1.3rem;margin:0}.reference-section>p{font-size:.9375rem;line-height:1.75;color:#536780;margin:18px 0 0}.reference-section math{max-width:100%;vertical-align:middle}.definition-panel{padding:24px 27px;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:auto}.definition-panel>math{font-size:1.15rem}.squeeze-large{margin:20px 0}.squeeze-large math{font-size:1.5rem}.definition-panel p{font-size:.9375rem;line-height:1.7;color:#566a85;margin-bottom:0}.reference-bullets{padding-left:21px;margin:21px 0 0;color:#536780;font-size:.9375rem;line-height:1.75}.reference-bullets li{margin-bottom:10px}.assumption-spaces{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.assumption-spaces>div{padding:19px 17px;border:1px solid var(--line);border-radius:9px;background:#fff}.assumption-spaces h3{font-size:.875rem;margin:0 0 14px;line-height:1.4}.assumption-spaces math{font-size:1.2rem}.assumption-spaces p{font-size:.8125rem;line-height:1.6;color:#697e98;margin:12px 0 0}.convention-note{background:#eaf0f9;border-left:3px solid #afc2e4;padding:16px 20px;font-size:.875rem!important;line-height:1.7;color:#4f6582;margin-top:22px}.convention-note p{margin:7px 0 0}.math-surface{display:flex;flex-direction:column;align-items:flex-start;gap:25px;padding:25px;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:auto}.math-surface math{font-size:1.16rem}.math-line{display:flex;flex-wrap:wrap;gap:22px 40px;align-items:center}.math-surface mtable{padding:0 .2em}.frozen-data{border:1px solid var(--line);border-radius:10px;background:#fff;margin:20px 0}.frozen-data summary{font-size:.875rem;font-weight:550;padding:16px 21px;cursor:pointer}.frozen-data pre{padding:22px;margin:0;border-top:1px solid var(--line);overflow:auto;color:#385573;background:#f8fafe;font-size:.8125rem;line-height:1.7}.allowance-comparison{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:17px}.allowance-comparison>div{display:flex;flex-direction:column;gap:13px;align-items:flex-start;border:1px solid var(--line);border-radius:9px;padding:19px;background:white;overflow:auto}.allowance-comparison span{font-size:.7rem;letter-spacing:.06em;color:#7b8da4}.allowance-comparison math{font-size:1.12rem}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:10px;background:white}.certificate-table{border-collapse:collapse;width:100%;font-size:.875rem}.certificate-table th{background:#edf2fa;text-align:left;color:#4c6481;font-weight:550;font-size:.8125rem}.certificate-table th,.certificate-table td{padding:15px 20px;border-bottom:1px solid #e4eaf3;vertical-align:middle}.certificate-table tr:last-child td{border-bottom:0}.certificate-table td:nth-child(2){white-space:nowrap;font-variant-numeric:tabular-nums;color:#294563}.certificate-table td:last-child{color:#64758d}.certificate-table math{font-size:1.15rem}.colour-key{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:23px 0}.colour-key>div{display:flex;gap:12px;align-items:flex-start}.colour-swatch{height:24px;width:24px;border-radius:6px;flex-shrink:0;margin-top:3px;border:1px solid #00000015}.colour-key strong{display:block;font-size:.875rem;margin-bottom:3px;font-weight:550}.colour-key span:not(.colour-swatch){display:block;font-size:.8125rem;color:#60768f;line-height:1.6}.swatch-blue{background:#4c79d5}.swatch-purple{background:#855eba}.swatch-deeppink{background:#b9b5e6;border-color:#4338ca}.swatch-orange{background:var(--palette-deeppink)}.swatch-coral{background:#e28186}.swatch-violet{background:#655dba}
}
@layer responsive {
@media(max-width:1250px){.assumption-spaces{grid-template-columns:repeat(2,minmax(0,1fr))}.care-grid{grid-template-columns:1fr}.overview-summary{flex-wrap:wrap}.overview-summary>.text-link{margin-left:auto}.protocol-detail{grid-template-columns:minmax(0,1fr);gap:15px}.stage-facts{flex-direction:row;flex-wrap:wrap;gap:15px 25px}.overview-bottom{grid-template-columns:1fr;gap:0}.overview-bottom>aside{border-top:1px solid var(--line)}.allowance-comparison{grid-template-columns:1fr}}
@media(max-width:760px){.intro-heading h1{font-size:1.85rem}.overview-summary{gap:17px;padding:19px}.overview-number{padding-right:17px;font-size:2rem}.overview-summary>div{min-width:180px}.overview-summary math{font-size:1.15rem}.board-heading{padding:21px 18px 12px;align-items:flex-start}.board-heading h2{font-size:1.12rem}.flow-controls{gap:5px}.flow-controls .icon-button{min-width:32px;height:32px;font-size:1rem}.protocol-scroll{padding-left:18px;padding-right:18px}.flow-node{width:211px}.protocol-detail{padding:22px 19px}.svd-branch{padding:21px 18px;gap:13px;flex-wrap:wrap}.svd-branch>div:last-child{flex:1;min-width:200px}.branch-source{min-width:54px}.branch-connector{font-size:1rem}.colour-key{grid-template-columns:1fr 1fr}.intro-footer{align-items:stretch;flex-direction:column}.intro-footer .page-button{justify-content:center;white-space:normal;text-align:center}.care-card{padding:20px 17px}.math-surface{padding:21px 17px}.math-surface math{font-size:1.05rem}.assumption-spaces>div{padding:17px 14px}.assumption-spaces math{font-size:1.05rem}.definition-panel{padding:22px 18px}.squeeze-large math{font-size:1.3rem}.certificate-table th,.certificate-table td{padding:13px 15px}.frozen-data pre{padding:17px;font-size:.75rem}.reference-section{padding:25px 0}.section-heading h2{font-size:1.17rem}}
@media(max-width:420px){.assumption-spaces{grid-template-columns:1fr}.colour-key{grid-template-columns:1fr}.flow-controls{display:none}}
}