/* ------- HERO ------- */
  .pbsa-hero { padding: 80px 0 72px; background: var(--gradient-deep); color: #fff; position: relative; overflow: hidden; }
  .pbsa-hero::before {
    content: ""; position: absolute; inset: 0;
    background: radial-gradient(circle at 78% 18%, rgba(97,206,112,0.10), transparent 55%);
    pointer-events: none;
  }
  .pbsa-hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; position: relative; z-index: 1; }
  .pbsa-hero h1 { font-family: var(--font-display); font-weight: 600; font-size: 60px; letter-spacing: -0.025em; line-height: 1.04; color: #fff; margin: 18px 0 22px; }
  .pbsa-hero h1 em { font-style: normal; color: var(--green-100); }
  .pbsa-hero p.sub { color: rgba(255,255,255,0.75); font-size: 19px; line-height: 1.55; margin-bottom: 14px; max-width: 540px; }
  .pbsa-hero p.support { color: rgba(255,255,255,0.55); font-size: 15px; line-height: 1.55; max-width: 520px; margin-bottom: 30px; display: flex; align-items: center; gap: 10px; }
  .pbsa-hero p.support::before { content: ""; display: block; width: 18px; height: 1px; background: rgba(255,255,255,0.35); flex-shrink: 0; }

  /* Campus / building stack visual */
  .campus { position: relative; height: 520px; padding: 24px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.10); border-radius: 20px; overflow: hidden; }
  .campus::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 64px; background: linear-gradient(transparent, rgba(15,20,25,0.55)); pointer-events: none; }
  .campus-skyline { position: absolute; left: 24px; right: 24px; bottom: 24px; top: 90px; display: flex; align-items: flex-end; gap: 14px; }
  .building { flex: 1; background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12); border-bottom: none; border-radius: 8px 8px 0 0; position: relative; display: flex; flex-direction: column; justify-content: flex-end; padding: 8px 8px 12px; }
  .building.b1 { height: 62%; }
  .building.b2 { height: 88%; background: rgba(97,206,112,0.06); border-color: rgba(97,206,112,0.25); }
  .building.b3 { height: 74%; }
  .building.b4 { height: 96%; }
  .building.b5 { height: 56%; }
  .building.b6 { height: 80%; }
  .building .floors { display: grid; grid-template-rows: repeat(auto-fill, 14px); grid-auto-flow: row; gap: 4px; }
  .building .floor { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3px; }
  .building .unit { height: 14px; background: rgba(255,255,255,0.08); border-radius: 2px; }
  .building.b2 .unit { background: rgba(97,206,112,0.22); }
  .building .lbl { position: absolute; top: -22px; left: 0; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.5); }
  .building.b2 .lbl { color: var(--green-100); }
  .building .ct { position: absolute; bottom: -22px; left: 0; right: 0; text-align: center; font-family: var(--font-mono); font-size: 10px; color: rgba(255,255,255,0.4); letter-spacing: 0.06em; }

  .campus-overlay {
    position: absolute; right: 32px; top: 88px; width: 280px;
    background: rgba(15,20,25,0.85); backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 12px; padding: 16px; z-index: 3;
    box-shadow: 0 18px 40px rgba(0,0,0,0.4);
  }
  .campus-overlay .ovh { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
  .campus-overlay .ovh .t { font-size: 12px; color: rgba(255,255,255,0.6); font-family: var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
  .campus-overlay .ovh .live { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--green-100); font-family: var(--font-mono); }
  .campus-overlay .ovh .live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green-100); box-shadow: 0 0 0 4px rgba(97,206,112,0.18); }
  .campus-overlay .ot { font-family: var(--font-display); font-weight: 600; font-size: 17px; color: #fff; letter-spacing: -0.01em; line-height: 1.2; }
  .campus-overlay .om { font-size: 12px; color: rgba(255,255,255,0.55); margin-top: 4px; }
  .campus-overlay .ovrows { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
  .campus-overlay .ovrow { display: flex; align-items: center; gap: 10px; font-size: 12px; color: rgba(255,255,255,0.7); font-family: var(--font-mono); }
  .campus-overlay .ovrow .dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
  .campus-overlay .ovrow .dot.ok { background: var(--green-100); }
  .campus-overlay .ovrow .dot.w { background: #E0A62B; }
  .campus-overlay .ovrow .nm { flex: 1; color: rgba(255,255,255,0.85); }
  .campus-overlay .ovrow .v { color: rgba(255,255,255,0.5); }

  .campus-stat-strip { position: absolute; left: 24px; top: 24px; right: 24px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; z-index: 2; }
  .campus-stat { padding: 10px 14px; background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.10); border-radius: 8px; }
  .campus-stat .l { font-size: 10px; color: rgba(255,255,255,0.5); font-family: var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; }
  .campus-stat .v { font-family: var(--font-display); font-weight: 700; font-size: 22px; color: #fff; letter-spacing: -0.02em; margin-top: 2px; }
  .campus-stat .v.green { color: var(--green-100); }

  /* ------- Section heading shared ------- */
  .pbsa-section { padding: 96px 0; }
  .pbsa-section h2 { font-family: var(--font-display); font-weight: 600; font-size: 40px; letter-spacing: -0.02em; line-height: 1.1; margin: 16px 0; max-width: 780px; }
  .pbsa-section .lead { font-size: 19px; color: var(--color-text-muted); line-height: 1.55; max-width: 720px; margin-bottom: 48px; }
  .alt-bg { background: var(--off-white-60); }
  .dark-bg { background: var(--anthracite-100); color: #fff; }
  .dark-bg h2 { color: #fff; }
  .dark-bg .lead { color: rgba(255,255,255,0.72); }

  /* ------- Problem cards ------- */
  .prob-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .prob-card { padding: 32px; background: #fff; border: 1px solid var(--color-border); border-radius: 16px; position: relative; }
  .prob-card .num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; color: var(--color-text-subtle); text-transform: uppercase; }
  .prob-card .ic { width: 44px; height: 44px; border-radius: 10px; background: rgba(217, 90, 80, 0.10); color: #C04032; display: flex; align-items: center; justify-content: center; margin: 16px 0 18px; }
  .prob-card .ic svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
  .prob-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 20px; margin-bottom: 8px; letter-spacing: -0.01em; }
  .prob-card p { font-size: 16px; color: var(--color-text-muted); line-height: 1.55; }

  /* ------- Solution: features + UI mock ------- */
  .sol-grid { display: grid; grid-template-columns: 0.85fr 1.1fr; gap: 64px; align-items: center; }
  .feat-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 4px; }
  .feat-list li { display: flex; align-items: flex-start; gap: 16px; padding: 18px 0; border-top: 1px solid var(--color-border); }
  .feat-list li:last-child { border-bottom: 1px solid var(--color-border); }
  .feat-list .check { flex-shrink: 0; width: 28px; height: 28px; border-radius: 8px; background: var(--green-20); color: #1E7A2B; display: flex; align-items: center; justify-content: center; }
  .feat-list .check svg { width: 16px; height: 16px; stroke: currentColor; fill: none; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
  .feat-list .ft { font-family: var(--font-display); font-weight: 600; font-size: 17px; color: var(--color-text); letter-spacing: -0.005em; }
  .feat-list .fd { font-size: 14px; color: var(--color-text-muted); margin-top: 2px; line-height: 1.5; }

  /* Inspection UI mock */
  .ui-mock { background: #fff; border: 1px solid var(--color-border); border-radius: 18px; box-shadow: var(--shadow-lg); overflow: hidden; }
  .ui-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--off-white-60); border-bottom: 1px solid var(--color-border); }
  .ui-bar .d { width: 10px; height: 10px; border-radius: 50%; background: var(--anthracite-20); }
  .ui-bar .url { flex: 1; margin-left: 8px; padding: 6px 12px; background: #fff; border: 1px solid var(--color-border); border-radius: 6px; font-family: var(--font-mono); font-size: 11px; color: var(--color-text-subtle); }
  .ui-body { display: grid; grid-template-columns: 200px 1fr; min-height: 480px; }
  .ui-side { background: var(--off-white-60); border-right: 1px solid var(--color-border); padding: 18px 14px; }
  .ui-side .lab { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-subtle); margin: 12px 8px 8px; }
  .ui-side .nav-i { padding: 8px 10px; border-radius: 6px; font-size: 13px; color: var(--color-text-muted); display: flex; align-items: center; gap: 8px; }
  .ui-side .nav-i.active { background: #fff; color: var(--color-text); font-weight: 600; box-shadow: var(--shadow-sm); }
  .ui-side .nav-i .b { width: 6px; height: 6px; border-radius: 50%; background: var(--anthracite-40); }
  .ui-side .nav-i.active .b { background: var(--green-100); }

  .ui-main { padding: 22px 24px; }
  .ui-main-h { display: flex; justify-content: space-between; align-items: center; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); margin-bottom: 18px; }
  .ui-main-h h5 { font-family: var(--font-display); font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
  .ui-main-h .meta { font-family: var(--font-mono); font-size: 11px; color: var(--color-text-subtle); }
  .ui-section-h { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-subtle); margin: 14px 0 10px; display: flex; justify-content: space-between; }
  .ui-section-h .pg { color: var(--green-100); font-weight: 700; }
  .ui-q { padding: 12px 14px; border: 1px solid var(--color-border); border-radius: 10px; margin-bottom: 8px; display: flex; align-items: center; gap: 12px; }
  .ui-q .qn { flex: 1; font-size: 13px; color: var(--color-text); }
  .ui-q .qstat { display: inline-flex; align-items: center; gap: 5px; padding: 4px 9px; border-radius: 999px; font-size: 11px; font-weight: 600; font-family: var(--font-body); }
  .ui-q .qstat.pass { background: var(--color-success-soft); color: #2C7C3E; }
  .ui-q .qstat.fail { background: var(--color-warning-soft); color: #8A6518; }
  .ui-q .qphoto { display: flex; gap: 4px; }
  .ui-q .qphoto span { width: 24px; height: 24px; border-radius: 5px; background: linear-gradient(135deg, #CBD5DE, #E3E8ED); }
  .ui-q .qphoto span:nth-child(2) { background: linear-gradient(135deg, #D3D8C4, #E7EADC); }
  .ui-q .qphoto span:nth-child(3) { background: linear-gradient(135deg, #D8CFC4, #ECE5DB); }

  /* ------- How it works ------- */
  .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
  .step-card { padding: 26px 24px 28px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.10); border-radius: 14px; }
  .step-card .n { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.5); }
  .step-card .ic { width: 38px; height: 38px; border-radius: 8px; background: rgba(97,206,112,0.14); display: flex; align-items: center; justify-content: center; margin: 18px 0 16px; }
  .step-card .ic svg { width: 20px; height: 20px; stroke: var(--green-100); fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
  .step-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 18px; color: #fff; letter-spacing: -0.01em; margin-bottom: 8px; }
  .step-card p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.55; }

  /* ------- Use cases (Built for PBSA) ------- */
  .uc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .uc-card { padding: 28px; background: #fff; border: 1px solid var(--color-border); border-radius: 16px; transition: transform 200ms var(--ease-standard), box-shadow 200ms var(--ease-standard); }
  .uc-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
  .uc-card .ic { width: 42px; height: 42px; border-radius: 10px; background: var(--off-white-100); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
  .uc-card .ic svg { width: 22px; height: 22px; stroke: var(--anthracite-100); fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
  .uc-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 18px; margin-bottom: 8px; letter-spacing: -0.01em; }
  .uc-card p { font-size: 15px; color: var(--color-text-muted); line-height: 1.55; }

  /* ------- Scale section: bullets + portfolio map ------- */
  .scale-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 64px; align-items: center; }
  .scale-bullets { list-style: none; padding: 0; margin: 32px 0 0; display: flex; flex-direction: column; gap: 14px; }
  .scale-bullets li { display: flex; align-items: flex-start; gap: 14px; font-size: 17px; color: var(--color-text); line-height: 1.5; }
  .scale-bullets .arr { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--green-100); color: #fff; display: flex; align-items: center; justify-content: center; margin-top: 2px; }
  .scale-bullets .arr svg { width: 12px; height: 12px; stroke: currentColor; fill: none; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

  .portfolio-viz { background: #fff; border: 1px solid var(--color-border); border-radius: 18px; padding: 28px; box-shadow: var(--shadow-md); }
  .pv-h { display: flex; justify-content: space-between; align-items: center; padding-bottom: 18px; border-bottom: 1px solid var(--color-border); margin-bottom: 18px; }
  .pv-h .t { font-family: var(--font-display); font-weight: 600; font-size: 16px; }
  .pv-h .pill { padding: 4px 10px; background: var(--green-20); color: #1E7A2B; border-radius: 999px; font-size: 11px; font-weight: 600; letter-spacing: 0.04em; }
  .pv-row { display: grid; grid-template-columns: 1.4fr 0.8fr 1.6fr 0.7fr; gap: 16px; align-items: center; padding: 12px 4px; border-bottom: 1px dashed var(--color-border); }
  .pv-row:last-child { border-bottom: none; }
  .pv-row .nm { font-size: 14px; font-weight: 600; color: var(--color-text); }
  .pv-row .nm .city { display: block; font-weight: 400; font-size: 12px; color: var(--color-text-subtle); margin-top: 2px; font-family: var(--font-mono); }
  .pv-row .ct { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-muted); }
  .pv-bar { height: 8px; background: var(--off-white-100); border-radius: 4px; overflow: hidden; position: relative; }
  .pv-bar .fill { height: 100%; background: var(--green-100); border-radius: 4px; }
  .pv-row .pct { font-family: var(--font-mono); font-size: 12px; color: var(--color-text); text-align: right; font-weight: 600; }

  /* ------- Output / reports ------- */
  .output-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
  .reports-stack { position: relative; height: 420px; }
  .doc { position: absolute; background: #fff; border: 1px solid var(--color-border); border-radius: 12px; box-shadow: 0 24px 50px rgba(54,62,72,0.18); padding: 22px 24px; display: flex; flex-direction: column; gap: 12px; }
  .doc .dh { display: flex; justify-content: space-between; align-items: center; padding-bottom: 10px; border-bottom: 1px solid var(--color-border); }
  .doc .dh .lo { display: flex; gap: 8px; align-items: center; }
  .doc .dh .lo .sq { width: 18px; height: 18px; background: var(--green-100); border-radius: 4px; }
  .doc .dh .lo .ln { width: 64px; height: 8px; background: var(--anthracite-100); border-radius: 2px; }
  .doc .dh .pg { font-family: var(--font-mono); font-size: 10px; color: var(--color-text-subtle); }
  .doc .dt { font-family: var(--font-display); font-weight: 600; font-size: 15px; }
  .doc .ds { font-size: 12px; color: var(--color-text-subtle); margin-top: -6px; }
  .doc .ph { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 5px; }
  .doc .ph span { aspect-ratio: 1; border-radius: 5px; background-color: #d6cfc1; background-size: cover; background-position: center; }
  .doc .ph span:nth-child(1) { background-image: url('../assets/inspection-photos/student-kitchen-communal.webp'); }
  .doc .ph span:nth-child(2) { background-image: url('../assets/inspection-photos/student-desk-bed.webp'); }
  .doc .ph span:nth-child(3) { background-image: url('../assets/inspection-photos/student-ensuite-shower.webp'); }
  .doc .rows { display: flex; flex-direction: column; gap: 6px; }
  .doc .rows .r { display: flex; gap: 8px; align-items: center; }
  .doc .rows .r .c { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
  .doc .rows .r .c.ok { background: var(--green-100); }
  .doc .rows .r .c.w { background: #E0A62B; }
  .doc .rows .r .l { flex: 1; height: 5px; background: var(--off-white-100); border-radius: 3px; }
  .doc .rows .r:nth-child(2) .l { width: 86%; flex: 0 0 auto; }
  .doc .rows .r:nth-child(3) .l { width: 70%; flex: 0 0 auto; }

  .doc.d1 { width: 64%; left: 4%; top: 6%; transform: rotate(-4deg); background: var(--off-white-90); opacity: 0.92; }
  .doc.d2 { width: 64%; left: 18%; top: 12%; transform: rotate(2deg); background: #FAFBFC; opacity: 0.96; }
  .doc.d3 { width: 70%; left: 22%; top: 22%; transform: none; }

  /* Compliance / confidence */
  .conf-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .conf-card { padding: 28px 30px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.1); border-radius: 14px; display: flex; gap: 18px; align-items: flex-start; }
  .conf-card .ic { flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px; background: rgba(97,206,112,0.14); display: flex; align-items: center; justify-content: center; }
  .conf-card .ic svg { width: 20px; height: 20px; stroke: var(--green-100); fill: none; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
  .conf-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 17px; color: #fff; margin-bottom: 6px; letter-spacing: -0.005em; }
  .conf-card p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.55; }

  /* ------- Multifamily relation banner ------- */
  .relation { padding: 96px 0; background: var(--off-white-60); }
  .relation-card { background: #fff; border: 1px solid var(--color-border); border-radius: 24px; padding: 56px; display: grid; grid-template-columns: 1fr 0.85fr; gap: 48px; align-items: center; box-shadow: var(--shadow-md); position: relative; overflow: hidden; }
  .relation-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--green-100); }
  .relation-card h2 { margin: 14px 0 14px; max-width: 100%; font-size: 36px; }
  .relation-card p { font-size: 17px; color: var(--color-text-muted); line-height: 1.55; }
  .relation-links { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
  .relation-link { display: inline-flex; align-items: center; gap: 8px; padding: 10px 14px; background: var(--off-white-60); border: 1px solid var(--color-border); border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--color-text); transition: all 150ms var(--ease-standard); }
  .relation-link:hover { background: var(--green-20); border-color: rgba(97,206,112,0.4); }
  .relation-link svg { width: 12px; height: 12px; stroke: currentColor; fill: none; stroke-width: 2; }

  .triad { display: flex; gap: 14px; align-items: stretch; }
  .triad .col { flex: 1; padding: 20px; border-radius: 14px; min-height: 220px; display: flex; flex-direction: column; justify-content: space-between; position: relative; }
  .triad .col.mfam { background: var(--off-white-100); border: 1px solid var(--color-border); }
  .triad .col.btr { background: var(--off-white-100); border: 1px solid var(--color-border); }
  .triad .col.pbsa { background: var(--anthracite-100); color: #fff; }
  .triad .col .lab { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-subtle); }
  .triad .col.pbsa .lab { color: var(--green-100); }
  .triad .col .nm { font-family: var(--font-display); font-weight: 600; font-size: 17px; margin-top: 8px; letter-spacing: -0.005em; }
  .triad .col.pbsa .nm { color: #fff; }
  .triad .col .units { font-family: var(--font-display); font-weight: 700; font-size: 28px; letter-spacing: -0.02em; }
  .triad .col .desc { font-size: 12px; color: var(--color-text-subtle); margin-top: 4px; }
  .triad .col.pbsa .desc { color: rgba(255,255,255,0.6); }
  .triad .col .pat { display: flex; flex-wrap: wrap; gap: 3px; margin-top: 12px; }
  .triad .col .pat span { width: 10px; height: 10px; border-radius: 2px; background: var(--anthracite-20); }
  .triad .col.pbsa .pat span { background: rgba(255,255,255,0.18); }
  .triad .col.pbsa .pat span:nth-child(3n) { background: var(--green-100); }

  /* ------- Final CTA ------- */
  .final-cta { background: var(--gradient-primary); color: #fff; padding: 110px 0; text-align: center; position: relative; overflow: hidden; }
  .final-cta::before {
    content: ""; position: absolute; left: 50%; top: -20%; width: 720px; height: 720px;
    background: radial-gradient(circle, rgba(97,206,112,0.18), transparent 60%);
    transform: translateX(-50%); pointer-events: none;
  }
  .final-cta .inner { position: relative; z-index: 1; }
  .final-cta h2 { font-family: var(--font-display); font-weight: 600; font-size: 48px; letter-spacing: -0.02em; color: #fff; max-width: 900px; margin: 16px auto; }
  .final-cta p.sup { color: rgba(255,255,255,0.78); font-size: 18px; margin-top: 8px; max-width: 640px; margin-left: auto; margin-right: auto; line-height: 1.55; }
  .final-cta .btns { display: flex; gap: 12px; justify-content: center; margin-top: 32px; }

  /* ------- Related ------- */
  .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .related-card { padding: 28px; background: #fff; border: 1px solid var(--color-border); border-radius: 16px; display: flex; flex-direction: column; gap: 16px; transition: all 180ms var(--ease-standard); }
  .related-card:hover { border-color: var(--anthracite-40); transform: translateY(-2px); box-shadow: var(--shadow-md); }
  .related-card .tag { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-subtle); }
  .related-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 20px; letter-spacing: -0.01em; }
  .related-card p { font-size: 15px; color: var(--color-text-muted); line-height: 1.55; flex: 1; }
  .related-card .go { font-size: 14px; font-weight: 600; color: var(--anthracite-100); display: inline-flex; align-items: center; gap: 6px; }
  .related-card .go svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 2; transition: transform 150ms; }
  .related-card:hover .go svg { transform: translateX(3px); }

  /* SEO copy block */
  .seo-strip { padding: 32px 0; background: var(--off-white-60); border-top: 1px solid var(--color-border); }
  .seo-strip p { font-size: 13px; color: var(--color-text-subtle); max-width: 1080px; line-height: 1.6; }

  /* Responsive minimums */
  @media (max-width: 980px) {
    .pbsa-hero-grid, .sol-grid, .scale-grid, .output-grid, .relation-card { grid-template-columns: 1fr; gap: 40px; }
    .prob-grid, .uc-grid, .steps-grid, .conf-grid, .related-grid { grid-template-columns: 1fr 1fr; }
    .pbsa-hero h1 { font-size: 44px; }
    .pbsa-section h2 { font-size: 32px; }
    .campus { height: 440px; }
  }
  @media (max-width: 640px) {
    .prob-grid, .uc-grid, .steps-grid, .conf-grid, .related-grid { grid-template-columns: 1fr; }
    .triad { flex-direction: column; }
  }