/* Product & Technology section — page components (frames, diagrams, tables, layer explorer). */
.ba-callout { padding: 30px; border: 1px solid #cfdbf3; border-radius: 26px; background: linear-gradient(135deg,#eaf2ff,#f4edff 55%,#fff3f8); box-shadow: var(--shadow-soft); }
    .ba-callout h3 { margin: 8px 0 10px; font-size: 1.6rem; letter-spacing: -.03em; }
    .ba-callout p { margin: 0; color: #536079; }
    .ba-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; margin-top: 20px; }
    .ba-card { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.94); box-shadow: var(--shadow-soft); }
    .ba-card > span { display: inline-flex; padding: 5px 9px; border-radius: 999px; color: var(--primary-dark); background: #eaf1ff; font-size: .7rem; font-weight: 900; text-transform: uppercase; letter-spacing: .06em; }
    .ba-card h3 { margin: 15px 0 8px; font-size: 1.25rem; letter-spacing: -.025em; }
    .ba-card p { margin: 0; color: var(--muted); }
    .ba-card ul { margin: 12px 0 0; padding-left: 18px; color: var(--muted); }
    .ba-card li::marker { color: var(--primary); }
    .value-stream { display: grid; grid-template-columns: repeat(7,minmax(112px,1fr)); gap: 10px; padding: 22px; overflow-x: auto; border: 1px solid var(--line); border-radius: 24px; background: rgba(255,255,255,.86); box-shadow: var(--shadow-soft); }
    .value-step { position: relative; min-width: 112px; padding: 18px 15px; border-radius: 17px; background: linear-gradient(145deg,#eef3ff,#fff); }
    .value-step:not(:last-child)::after { content: "→"; position: absolute; right: -9px; top: 50%; z-index: 2; color: var(--primary); font-weight: 950; transform: translate(50%,-50%); }
    .value-step b { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 10px; color: #fff; background: linear-gradient(135deg,var(--primary),var(--purple)); font-size: .7rem; }
    .value-step strong { display: block; margin-top: 13px; }
    .value-step small { display: block; margin-top: 5px; color: var(--muted); line-height: 1.35; }
    .ba-definition { margin-top: 20px; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow-soft); }
    .ba-definition-row { display: grid; grid-template-columns: 170px 1fr; gap: 20px; padding: 16px 20px; }
    .ba-definition-row + .ba-definition-row { border-top: 1px solid var(--line); }
    .ba-definition-row dt { color: var(--primary-dark); font-size: .76rem; font-weight: 900; letter-spacing: .06em; text-transform: uppercase; }
    .ba-definition-row dd { margin: 0; color: #536079; }
    .safe-map { display: grid; gap: 10px; padding: 28px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(145deg,#fff,#f8faff); box-shadow: var(--shadow-soft); }
    .safe-level { display: grid; grid-template-columns: 145px 1fr; gap: 18px; align-items: start; }
    .safe-level > span { padding: 8px 11px; border-radius: 10px; color: var(--level-colour); background: var(--level-bg); font-size: .72rem; font-weight: 900; letter-spacing: .06em; text-align: center; text-transform: uppercase; }
    .safe-level > div { padding: 14px 17px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
    .safe-level strong { display: block; }
    .safe-level small { color: var(--muted); }
    .safe-connector { width: 2px; height: 13px; margin-left: 72px; background: #cbd6f6; }
    .safe-theme { --level-colour:#174fc4; --level-bg:#eaf1ff; }
    .safe-epic { --level-colour:#6841d9; --level-bg:#f1eaff; }
    .safe-capability { --level-colour:#087c7b; --level-bg:#e9fbf6; }
    .safe-feature { --level-colour:#b53173; --level-bg:#fff0f6; }
    .safe-story { --level-colour:#9a6700; --level-bg:#fff7df; }
    .domain-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
    .domain-card { padding: 20px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
    .domain-card b { color: var(--primary); font-size: .76rem; }
    .domain-card strong { display: block; margin: 10px 0 5px; }
    .domain-card p { margin: 0; color: var(--muted); font-size: .9rem; }
    .ai-flow { display: flex; align-items: stretch; gap: 9px; padding: 22px; overflow-x: auto; border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg,#eef4ff,#faf7ff); }
    .ai-flow div { min-width: 132px; flex: 1; padding: 16px; border: 1px solid rgba(203,214,246,.9); border-radius: 15px; background: rgba(255,255,255,.9); }
    .ai-flow b { display: block; color: var(--primary); font-size: .7rem; }
    .ai-flow strong { display: block; margin: 8px 0 4px; }
    .ai-flow small { color: var(--muted); }
    .ai-flow > span { align-self: center; color: var(--purple); font-weight: 950; }
    .ba-table-wrap { margin-top: 24px; overflow-x: auto; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow-soft); }
    .ba-table { width: 100%; min-width: 760px; border-collapse: collapse; font-size: .9rem; }
    .ba-table th { padding: 13px 15px; color: #536079; background: #f5f7fb; font-size: .72rem; letter-spacing: .055em; text-align: left; text-transform: uppercase; }
    .ba-table td { padding: 15px; vertical-align: top; border-top: 1px solid var(--line); color: #536079; }
    .ba-table td strong { color: var(--text); }
    .status { display: inline-flex; padding: 5px 8px; border-radius: 999px; color: #087c5f; background: #e9fbf6; font-size: .7rem; font-weight: 900; text-transform: uppercase; }
    .status.conditional { color: #9a6700; background: #fff7df; }
    .ac-list { counter-reset: ac; display: grid; gap: 10px; margin: 20px 0 0; padding: 0; list-style: none; }
    .ac-list li { counter-increment: ac; display: grid; grid-template-columns: 38px 1fr; gap: 12px; align-items: start; padding: 15px 17px; border: 1px solid var(--line); border-radius: 15px; color: #536079; background: #fff; }
    .ac-list li::before { content: "AC" counter(ac); display: grid; place-items: center; width: 34px; height: 28px; border-radius: 9px; color: var(--primary-dark); background: #eaf1ff; font-size: .66rem; font-weight: 900; }
    .trace-note { display: flex; align-items: flex-start; gap: 15px; margin-top: 20px; padding: 18px 20px; border: 1px solid #bfdbfe; border-radius: 16px; color: #536079; background: #eff6ff; }
    .trace-note b { color: var(--primary-dark); }
    .architecture-responsibilities { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; }
    .architecture-responsibilities span { padding: 11px 13px; border: 1px solid var(--line); border-radius: 12px; background: #fff; font-weight: 800; }
    .architecture-responsibilities b { color: var(--primary); }
    .ba-review-actions { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 22px; padding: 26px; border: 1px solid #cfdbf3; border-radius: 24px; background: linear-gradient(135deg,#eaf2ff,#f4edff 55%,#fff3f8); }
    .ba-review-actions h3 { margin: 0 0 7px; font-size: 1.45rem; }
    .ba-review-actions p { margin: 0; color: var(--muted); }
    .ba-review-actions .button { flex: none; }
    .ba-proof { display: grid; grid-template-columns: minmax(0,1fr) minmax(280px,.76fr); gap: 26px; align-items: center; margin-bottom: 22px; padding: 26px; border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(145deg,#fff,#f7f9ff); box-shadow: var(--shadow-soft); }
    .ba-proof.reverse { grid-template-columns: minmax(280px,.76fr) minmax(0,1fr); }
    .ba-proof img { width: 100%; max-height: 430px; object-fit: contain; border-radius: 20px; background: linear-gradient(145deg,#eef3ff,#faf7ff); }
    .ba-proof-copy h3 { margin: 10px 0 10px; font-size: clamp(1.8rem,3.5vw,3rem); line-height: 1; letter-spacing: -.045em; }
    .ba-proof-copy p { margin: 0; color: var(--muted); }
    .ba-proof-copy ul { margin: 17px 0 0; padding-left: 19px; color: #536079; }
    .ba-proof-copy li::marker { color: var(--primary); }
    .layer-model { position: relative; display: grid; grid-template-columns: minmax(0,1fr); gap: 12px; width: 100%; }
    .layer-visual { position: static; padding: 28px 28px 10px; border: 1px solid var(--line); border-radius: 26px; background: linear-gradient(145deg,#eef3ff,#faf7ff); box-shadow: var(--shadow); }
    .layer-visual img { width: 100%; max-height: 560px; object-fit: contain; border-radius: 18px; }
    .layer-visual p { margin: 16px 2px 0; color: var(--muted); font-size: .9rem; }
    .exploded-heading h3 { margin: 8px 0 7px; font-size: clamp(1.8rem,3vw,2.7rem); line-height: 1; letter-spacing: -.045em; }
    .exploded-heading p { margin: 0; }
    .exploded-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; padding: 5px; margin: 20px 0 10px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.72); }
    .exploded-controls button { min-height: 40px; border: 0; border-radius: 10px; color: var(--muted); background: transparent; cursor: pointer; font-weight: 850; }
    .exploded-controls button[aria-pressed="true"] { color: #fff; background: linear-gradient(135deg,var(--primary),var(--purple)); }
    .layer-picker { display: grid; grid-template-columns: repeat(7,minmax(0,1fr)); gap: 7px; margin: 14px 0 4px; }
    .layer-picker button { min-height: 48px; padding: 7px 5px; border: 1px solid var(--line); border-radius: 12px; color: var(--muted); background: rgba(255,255,255,.82); cursor: pointer; font-size: .72rem; font-weight: 900; }
    .layer-picker button:hover { border-color: #aebff1; background: #fff; }
    .layer-picker button[aria-pressed="true"] { color: #fff; border-color: transparent; background: linear-gradient(135deg,var(--primary),var(--purple)); box-shadow: 0 9px 20px rgba(36,107,253,.2); }
    .together-tile { position: relative; min-height: 112px; overflow: hidden; border: 1px solid var(--line); border-left: 4px solid var(--tile-colour); border-radius: 14px; background: #fff; box-shadow: 0 9px 20px rgba(40,72,126,.08); transition: opacity .25s ease, transform .25s ease, box-shadow .25s ease; }
    .together-tile strong { position: absolute; left: 10px; bottom: 8px; z-index: 2; padding: 4px 7px; border-radius: 7px; color: #25314a; background: rgba(255,255,255,.92); font-size: .62rem; line-height: 1.15; }
    .tile-art { position: absolute; inset: 9px 9px 31px; overflow: hidden; border-radius: 8px; background: var(--tile-bg); }
    .tile-matte { --tile-colour:#64748b; --tile-bg:#f8fafc; }
    .tile-matte .tile-art { border: 6px solid #fff; box-shadow: inset 0 0 0 1px #cbd5e1; }
    .tile-frame { --tile-colour:#172033; --tile-bg:#f8fafc; }
    .tile-frame .tile-art { border: 9px solid #292b38; }
    .tile-base { --tile-colour:#246bfd; --tile-bg:linear-gradient(#78b9f5 0 55%,#477f52 55%); }
    .tile-base .tile-art::after { content:"☁️  🏔️"; position:absolute; inset:14px 0 0; text-align:center; font-size:1.1rem; }
    .tile-behind { --tile-colour:#0ea5a4; --tile-bg:linear-gradient(#78b9f5 0 55%,#477f52 55%); }
    .tile-behind .tile-art::after { content:"TEXT"; position:absolute; inset:50% 0 auto; color:#fff; text-align:center; font-size:1rem; font-weight:950; transform:translateY(-50%); }
    .tile-subject { --tile-colour:#7c4dff; --tile-bg:linear-gradient(#78b9f5 0 55%,#477f52 55%); }
    .tile-subject .tile-art::after { content:"🧍🏻‍♀️"; position:absolute; inset:6px 0 0; text-align:center; font-size:2.3rem; }
    .tile-front { --tile-colour:#ec4899; --tile-bg:linear-gradient(#78b9f5 0 55%,#477f52 55%); }
    .tile-front .tile-art::after { content:"✨  DATE"; position:absolute; right:7px; top:7px; color:#fff; font-size:.75rem; font-weight:900; }
    .tile-fx { --tile-colour:#c47b00; --tile-bg:linear-gradient(135deg,#dbeafe,#f5d0fe); }
    .tile-fx .tile-art::after { content:"✨  •  ✦  •  ✨"; position:absolute; inset:50% 0 auto; color:#b45309; text-align:center; font-size:1rem; transform:translateY(-50%); }
    .layer-visual[data-exploded="false"] .exploded-scene { display: grid; }
    .layer-visual[data-layer-focus] .together-tile { opacity: .22; }
    .layer-visual[data-layer-focus="matte"] .tile-matte,
    .layer-visual[data-layer-focus="frame"] .tile-frame,
    .layer-visual[data-layer-focus="base"] .tile-base,
    .layer-visual[data-layer-focus="behind"] .tile-behind,
    .layer-visual[data-layer-focus="subject"] .tile-subject,
    .layer-visual[data-layer-focus="front"] .tile-front,
    .layer-visual[data-layer-focus="fx"] .tile-fx { opacity: 1; transform: translateY(-3px); box-shadow: 0 12px 26px rgba(40,72,126,.16); }
    .exploded-scene { display: grid; place-items: center; min-height: 380px; overflow: hidden; perspective: 1100px; }
    .exploded-stack { position: relative; width: clamp(360px,46vw,500px); aspect-ratio: 392/340; transform-style: preserve-3d; transform: rotateX(58deg) rotateZ(-31deg) translateY(-2%); }
    .exploded-layer { position: absolute; inset: 0; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.88); border-radius: 15px; box-shadow: 0 17px 28px rgba(40,72,126,.13); transition: transform .5s cubic-bezier(.2,.8,.2,1), opacity .3s ease; }
    .exploded-layer span { position: absolute; left: 10px; top: 9px; padding: 4px 7px; border-radius: 7px; color: #25314a; background: rgba(255,255,255,.9); font-size: .56rem; font-weight: 900; letter-spacing: .04em; text-transform: uppercase; }
    .x-matte { background: rgba(255,255,255,.96); transform: translateZ(0); }
    .x-frame { inset: 5%; border: 13px solid #292b38; background: #f8f8f8; transform: translateZ(26px); }
    .x-photo { inset: 12%; overflow: hidden; background: linear-gradient(#78b9f5 0 54%,#477f52 54%); transform: translateZ(52px); }
    .x-photo::before { content: "☁️  ☀️"; position: absolute; top: 16%; left: 12%; font-size: 1.8rem; letter-spacing: 1.5em; }
    .x-behind { inset: 12%; color: #fff; background: transparent; border-color: rgba(14,165,164,.8); transform: translateZ(78px); }
    .x-behind::after { content: "MAGIC TEXT"; font-size: 2.15rem; font-weight: 950; text-shadow: 0 3px 7px rgba(0,0,0,.4); }
    .x-subject { inset: 12%; background: transparent; border-color: rgba(124,77,255,.82); transform: translateZ(104px); }
    .x-subject::after { content: "🧍🏻‍♀️"; position: absolute; left: 25%; bottom: -4%; font-size: 7rem; filter: drop-shadow(0 10px 8px rgba(0,0,0,.3)); }
    .x-front { inset: 12%; background: transparent; border-color: rgba(236,72,153,.8); transform: translateZ(130px); }
    .x-front::after { content: "✨"; position: absolute; right: 17%; top: 14%; font-size: 3rem; }
    .x-fx { inset: 12%; background: linear-gradient(135deg,transparent,rgba(255,255,255,.2)); border-color: rgba(245,158,11,.82); transform: translateZ(156px); }
    .layer-visual[data-exploded="false"] .x-frame { transform: translateZ(13px); }
    .layer-visual[data-exploded="false"] .x-photo { transform: translateZ(26px); }
    .layer-visual[data-exploded="false"] .x-behind { transform: translateZ(39px); }
    .layer-visual[data-exploded="false"] .x-subject { transform: translateZ(52px); }
    .layer-visual[data-exploded="false"] .x-front { transform: translateZ(65px); }
    .layer-visual[data-exploded="false"] .x-fx { transform: translateZ(78px); }
    .layer-visual[data-layer-focus] .exploded-layer { opacity: .16; }
    .layer-visual[data-layer-focus="matte"] .x-matte,
    .layer-visual[data-layer-focus="frame"] .x-frame,
    .layer-visual[data-layer-focus="base"] .x-photo,
    .layer-visual[data-layer-focus="behind"] .x-behind,
    .layer-visual[data-layer-focus="subject"] .x-subject,
    .layer-visual[data-layer-focus="front"] .x-front,
    .layer-visual[data-layer-focus="fx"] .x-fx { opacity: 1; }
    .layer-visual[data-exploded="false"][data-layer-focus] .exploded-layer { opacity: 1; }
    .layer-stack { display: block; }
    .layer-stack .layer-row { display: none; }
    .layer-stack .layer-row[aria-pressed="true"] { display: grid; }
    .layer-row { display: grid; grid-template-columns: 54px 1fr; gap: 15px; align-items: start; padding: 18px; border: 1px solid var(--line); border-left: 4px solid var(--layer-colour); border-radius: 17px; background: rgba(255,255,255,.94); box-shadow: var(--shadow-soft); }
    .layer-row[role="button"] { cursor: pointer; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease; }
    .layer-row[role="button"]:hover { transform: translateY(-3px); border-color: var(--layer-colour); box-shadow: var(--shadow); }
    .layer-row[role="button"]:focus-visible { outline: 3px solid rgba(36,107,253,.28); outline-offset: 3px; }
    .layer-row[aria-pressed="true"] { border-color: var(--layer-colour); background: var(--layer-bg); box-shadow: 0 15px 34px rgba(40,72,126,.16); }
    .layer-number { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; color: var(--layer-colour); background: var(--layer-bg); font-size: .72rem; font-weight: 950; }
    .layer-row h3 { margin: 0 0 5px; font-size: 1.14rem; }
    .layer-row p { margin: 0; color: var(--muted); font-size: .92rem; }
    .layer-row dl { display: grid; grid-template-columns: 112px 1fr; gap: 5px 12px; margin: 12px 0 0; padding-top: 11px; border-top: 1px solid var(--line); font-size: .82rem; }
    .layer-row dt { color: var(--text); font-weight: 850; }
    .layer-row dd { margin: 0; color: var(--muted); }
    .layer-matte { --layer-colour:#64748b; --layer-bg:#f1f5f9; }
    .layer-frame { --layer-colour:#172033; --layer-bg:#eef2f7; }
    .layer-base { --layer-colour:#246bfd; --layer-bg:#eaf1ff; }
    .layer-behind { --layer-colour:#0ea5a4; --layer-bg:#e9fbf6; }
    .layer-subject { --layer-colour:#7c4dff; --layer-bg:#f1eaff; }
    .layer-front { --layer-colour:#ec4899; --layer-bg:#fff0f6; }
    .layer-fx { --layer-colour:#c47b00; --layer-bg:#fff7df; }
    .pipeline-flow { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; margin-top: 22px; }
    .pipeline-step { position: relative; padding: 21px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow-soft); }
    .pipeline-step:not(:last-child)::after { content: "→"; position: absolute; right: -13px; top: 50%; z-index: 2; display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; color: #fff; background: var(--primary); font-weight: 950; transform: translateY(-50%); }
    .pipeline-step b { color: var(--primary); font-size: .72rem; letter-spacing: .06em; }
    .pipeline-step h3 { margin: 11px 0 7px; font-size: 1.12rem; }
    .pipeline-step p { margin: 0; color: var(--muted); font-size: .88rem; }
    .delivery-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 10px; margin-top: 18px; }
    .delivery-grid div { padding: 16px; border: 1px solid var(--line); border-radius: 15px; color: #536079; background: linear-gradient(145deg,#fff,#f7f9ff); text-align: center; font-weight: 850; }
    .build-map { display: grid; gap: 10px; margin-top: 24px; }
    .build-layer { display: grid; grid-template-columns: 190px 1fr; gap: 20px; align-items: center; padding: 18px 20px; border: 1px solid var(--line); border-left: 4px solid var(--build-colour); border-radius: 17px; background: #fff; box-shadow: var(--shadow-soft); }
    .build-layer > div:first-child { color: var(--build-colour); font-weight: 900; }
    .build-layer strong { display: block; color: var(--text); }
    .build-layer p { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }
    .build-experience { --build-colour:#246bfd; }
    .build-state { --build-colour:#0ea5a4; }
    .build-domain { --build-colour:#7c4dff; }
    .build-usecase { --build-colour:#ec4899; }
    .build-pipeline { --build-colour:#c47b00; }
    .build-render { --build-colour:#475569; }
    .build-delivery { --build-colour:#168a68; }
    .sfia-banner { display: grid; grid-template-columns: 150px 1fr; gap: 24px; align-items: center; padding: 28px; border: 1px solid #cbd6f6; border-radius: 24px; background: linear-gradient(135deg,#eef3ff,#f8f5ff 58%,#fff); box-shadow: var(--shadow-soft); }
    .sfia-badge { display: grid; place-items: center; min-height: 124px; border-radius: 21px; color: #fff; background: linear-gradient(135deg,var(--primary),var(--purple)); box-shadow: 0 16px 35px rgba(36,107,253,.22); text-align: center; }
    .sfia-badge b { display: block; font-size: 2.5rem; line-height: 1; }
    .sfia-badge span { display: block; margin-top: 7px; font-size: .73rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
    .sfia-banner h3 { margin: 8px 0 8px; font-size: clamp(1.8rem,3vw,2.8rem); line-height: 1; letter-spacing: -.045em; }
    .sfia-banner p { margin: 0; color: var(--muted); }
    .sfia-map { display: grid; gap: 12px; margin-top: 22px; }
    .sfia-row { display: grid; grid-template-columns: minmax(230px,.8fr) minmax(0,1.2fr); gap: 18px; padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: #fff; box-shadow: var(--shadow-soft); }
    .sfia-row h3 { margin: 0 0 6px; font-size: 1.08rem; }
    .sfia-row p { margin: 0; color: var(--muted); font-size: .9rem; }
    .sfia-evidence { padding: 14px 16px; border-radius: 13px; color: #536079; background: #f5f8ff; }
    .sfia-evidence strong { display: block; margin-bottom: 5px; color: var(--primary-dark); font-size: .75rem; letter-spacing: .05em; text-transform: uppercase; }
    .bpmn-frame { margin-top: 20px; padding: 14px; overflow-x: auto; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.94); box-shadow: var(--shadow-soft); }
    .bpmn-frame svg { display: block; height: auto; }
    .bpmn-hint { margin: 10px 2px 0; color: var(--muted); font-size: .82rem; }
    .bpmn-legend { display: grid; grid-template-columns: repeat(auto-fit,minmax(210px,1fr)); gap: 10px 20px; margin-top: 20px; padding: 20px 24px; border: 1px solid var(--line); border-radius: 20px; background: linear-gradient(145deg,#fff,#f8faff); }
    .bpmn-legend div { display: flex; gap: 11px; align-items: center; color: #536079; font-size: .84rem; }
    .bpmn-legend svg { flex: none; }
    .bp-pool { fill: #f2f5fc; stroke: #4a5673; stroke-width: 1.4; }
    .bp-lane { fill: #fff; stroke: #4a5673; stroke-width: 1; }
    .bp-lane.alt { fill: #fbfcff; }
    .bp-poolLabel { fill: var(--primary-dark); font-size: 12.5px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
    .bp-laneLabel { fill: #6a7691; font-size: 11.5px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    .bp-task { fill: #fff; stroke: #4a5673; stroke-width: 1.5; }
    .bp-task.ai { fill: #eef3ff; }
    .bp-task.store { fill: #f5efff; }
    .bp-text { fill: var(--text); font-size: 11.5px; text-anchor: middle; }
    .bp-ev { fill: #fff; stroke: #4a5673; stroke-width: 2; }
    .bp-ev.end { stroke-width: 3.6; }
    .bp-evText { fill: #6a7691; font-size: 11px; text-anchor: middle; }
    .bp-gate { fill: #fff7df; stroke: #4a5673; stroke-width: 1.5; }
    .bp-gateGlyph { fill: none; stroke: #4a5673; stroke-width: 1.6; }
    .bp-flow { fill: none; stroke: #4a5673; stroke-width: 1.5; }
    .bp-msg { fill: none; stroke: #4a5673; stroke-width: 1.4; stroke-dasharray: 7 5; }
    .bp-flowLabel { fill: #6a7691; font-size: 10.5px; font-style: italic; text-anchor: middle; }
    .bp-glyph { fill: none; stroke: #4a5673; stroke-width: 1.4; }
    @media (max-width: 980px) {
      .domain-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .ba-proof, .ba-proof.reverse { grid-template-columns: 1fr; }
      .layer-visual { position: static; }
      .exploded-scene { place-items: center; }
      .pipeline-flow { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .pipeline-step:nth-child(2)::after { display: none; }
      .delivery-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
    }
    @media (max-width: 680px) {
    }
    @media (max-width: 680px) {
      .layer-picker { grid-template-columns: repeat(4,minmax(0,1fr)); }
      .exploded-scene { min-height: 340px; }
      .exploded-stack { width: min(360px,100%); }
      .ba-grid, .domain-grid { grid-template-columns: 1fr; }
      .ba-definition-row, .safe-level { grid-template-columns: 1fr; gap: 8px; }
      .safe-connector { margin-left: 20px; }
      .safe-level > span { justify-self: start; }
      .ba-callout, .safe-map { padding: 22px; }
      .layer-model { grid-template-columns: 1fr; }
      .layer-row dl { grid-template-columns: 1fr; gap: 2px; }
      .pipeline-flow, .delivery-grid { grid-template-columns: 1fr; }
      .pipeline-step::after { display: none !important; }
      .build-layer { grid-template-columns: 1fr; gap: 5px; }
      .exploded-scene { min-height: 390px; }
      .exploded-stack { transform: rotateX(58deg) rotateZ(-31deg) translateY(-3%) scale(.86); }
      .sfia-banner, .sfia-row { grid-template-columns: 1fr; }
      .sfia-badge { min-height: 100px; }
    }

/* ---- Section chrome: breadcrumb, sub-navigation, cards, pager, FAQ ---- */
.pt-breadcrumb { padding: 14px 0 0; color: var(--muted); font-size: .8rem; }
.pt-breadcrumb a { color: var(--muted); }
.pt-breadcrumb a:hover { color: var(--primary-dark); }
.pt-breadcrumb span { color: var(--text); font-weight: 700; }
.pt-shell { padding-bottom: 96px; }
.pt-subnav { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 34px; padding: 8px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.9); box-shadow: var(--shadow-soft); }
.pt-subnav a { padding: 9px 15px; border-radius: 999px; color: var(--muted); font-size: .86rem; font-weight: 800; }
.pt-subnav a:hover { color: var(--primary-dark); background: #eef3ff; }
.pt-subnav a[aria-current="page"] { color: #fff; background: linear-gradient(135deg,var(--primary),var(--purple)); }
.pt-cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 16px; }
.pt-card { display: block; padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.94); box-shadow: var(--shadow-soft); transition: border-color .2s ease, transform .2s ease; }
.pt-card:hover { border-color: #cbd6f6; transform: translateY(-2px); }
.pt-card > span { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 10px; color: #fff; background: linear-gradient(135deg,var(--primary),var(--purple)); font-size: .7rem; font-weight: 900; }
.pt-card h2 { margin: 14px 0 8px; font-size: 1.2rem; letter-spacing: -.025em; }
.pt-card p { margin: 0; color: var(--muted); font-size: .92rem; }
.pt-h2 { margin: 48px 0 14px; font-size: 1.7rem; letter-spacing: -.03em; }
.pt-faq { padding: 16px 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; box-shadow: var(--shadow-soft); }
.pt-faq + .pt-faq { margin-top: 9px; }
.pt-faq summary { color: var(--text); font-weight: 800; cursor: pointer; }
.pt-faq p { margin: 10px 0 0; color: var(--muted); }
.pt-pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--line); }
.pt-pager a { color: var(--primary-dark); font-weight: 800; font-size: .92rem; }
.pt-cta { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 26px; align-items: center; margin-top: 30px; padding: 30px; border: 1px solid #cfdbf3; border-radius: 26px; background: linear-gradient(135deg,#eaf2ff,#f4edff 55%,#fff3f8); box-shadow: var(--shadow-soft); }
.pt-cta h2 { margin: 8px 0 6px; font-size: 1.5rem; letter-spacing: -.03em; }
.pt-cta p { margin: 0; color: #536079; }
/* Topic-boundary spacers. These components (safe-map, sfia-banner, trace-note, domain-grid)
   were authored for a single tabbed page where a shared `.ba-section` wrapper supplied the gap
   between topics. Split across separate Technology pages, some topics are still concatenated on
   one page (e.g. how-the-app-is-built-and-tested.html), and at those specific boundaries neither
   component owns a margin, so they were touching with zero gap. Fix the exact pairs found. */
.trace-note + .safe-map,
.safe-map + .sfia-banner,
.bpmn-legend + .domain-grid { margin-top: 40px; }

@media (max-width: 980px) {
  .pt-cards { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .pt-cta { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .pt-cards { grid-template-columns: 1fr; }
  .pt-subnav { border-radius: 20px; }
}