.tool-layout{gap:1.5rem;margin:1.5rem 0;display:grid}@media (width>=768px){.tool-layout{grid-template-columns:1fr 1fr;align-items:start}}.tool-form fieldset{border:1px solid var(--line-subtle);border-radius:var(--radius);background:var(--surface-raised);margin-bottom:1.25rem;padding:clamp(1rem,3.5vw,1.35rem);box-shadow:0 2px 8px #0000001f}.tool-form legend{color:var(--brand);padding:0 .5rem;font-weight:600}.tool-form label>span{margin-bottom:.25rem;font-weight:500;display:block}.tool-form input[type=number],.tool-form select{border:1px solid var(--line-subtle);border-radius:var(--radius);background:var(--surface-raised);width:100%;color:var(--text-primary);font:inherit;padding:.5rem}.tool-form label{margin-bottom:.9rem;display:block}.tool-form label:last-child{margin-bottom:0}.tool-form small{color:var(--text-secondary);margin-top:.25rem;font-size:.85rem;display:block}.radio-row{flex-wrap:wrap;gap:1rem;margin-bottom:.25rem;display:flex}.radio-label{cursor:pointer;align-items:center;gap:.35rem;margin-bottom:0;font-weight:400;display:flex}.results-panel{background:var(--surface-raised);border:1px solid var(--line-subtle);border-radius:var(--radius);padding:clamp(1rem,3.5vw,1.35rem);box-shadow:0 4px 16px -2px #0000002e}.results-panel h2{margin-top:0;font-size:1.1rem}.result-line{border-bottom:1px solid var(--line-subtle);justify-content:space-between;gap:1rem;padding:.5rem 0;display:flex}.result-line:last-of-type{border-bottom:none}.result-line.headline{font-size:1.05rem;font-weight:600}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-weight:600}.passfail{border-radius:var(--radius);text-align:center;background:var(--bg-base);margin-top:.75rem;padding:.65rem;font-weight:600}.passfail.pass{color:var(--status-in-force);background:#4ade801f}.passfail.fail{color:var(--status-upcoming);background:#f871711f}.passfail.warn{color:var(--accent-strong,#f5a524);background:#f5a5241f}.worked-example{border:1px solid var(--line-subtle);border-radius:var(--radius);background:var(--surface-raised);margin:1.5rem 0;padding:.75rem 1rem}.worked-example summary{cursor:pointer;color:var(--brand);font-weight:600}.example-content{margin-top:.75rem}.reg-ref{color:var(--text-secondary);margin-top:1.5rem;font-size:.9rem}.tool-note{border-left:3px solid var(--brand);background:var(--surface-raised);border-radius:0 var(--radius) var(--radius) 0;color:var(--text-secondary);margin:1.25rem 0;padding:.6rem .9rem;font-size:.92rem}.results-header-actions{flex-wrap:wrap;align-items:center;gap:.5rem;display:flex}.copy-calc-btn{background:var(--surface-raised,#1e293b);color:var(--text-primary,#f8fafc);border:1px solid var(--line-subtle,#334155);border-radius:var(--radius,6px);cursor:pointer;user-select:none;align-items:center;gap:.4rem;min-height:34px;padding:.35rem .75rem;font-size:.8rem;font-weight:600;line-height:1;transition:all .15s ease-in-out;display:inline-flex}.copy-calc-btn:hover{background:color-mix(in srgb, var(--brand) 15%, transparent);border-color:var(--brand);color:var(--brand)}.copy-calc-btn:active{transform:scale(.97)}.copy-calc-btn.copied{color:#22c55e!important;background:#4ade802e!important;border-color:#22c55e!important}.copy-calc-btn .copy-icon{font-size:.9rem}.print-calc-btn{background:var(--surface-raised,#1e293b);color:var(--text-primary,#f8fafc);border:1px solid var(--line-subtle,#334155);border-radius:var(--radius,6px);cursor:pointer;user-select:none;align-items:center;gap:.4rem;min-height:38px;padding:.35rem .75rem;font-size:.8rem;font-weight:600;line-height:1;transition:all .15s ease-in-out;display:inline-flex}.print-calc-btn:hover{background:color-mix(in srgb, var(--brand) 15%, transparent);border-color:var(--brand);color:var(--brand)}.print-calc-btn:active{transform:scale(.97)}@media (width<=640px){.tool-form input[type=number],.tool-form select{min-height:48px;font-size:1rem}.copy-calc-btn,.print-calc-btn{min-height:44px;padding:.5rem .85rem}}.print-certificate-header,.print-sign-off-block{display:none}@page{size:A4 portrait;margin:12mm 15mm}@media print{*{-webkit-print-color-adjust:exact!important;print-color-adjust:exact!important}body{color:#000!important;background:#fff!important;font-size:9.5pt!important;line-height:1.35!important}header,nav,footer,.site-header,.site-footer,.inst-back-bar,.results-header-actions,.site-nav,.theme-toggle,.related-links,.plant-room-badge,.preset-container,.tool-presets,.tool-intro,.tool-faqs,.worked-example,.cs-mobile-bar,#cs-mobile-bar,.installation-method-picker,.calc-history-drawer,.drawer-toggle-btn,button,.boundary-callout,.step-card--warning,.tool-provenance-footer,.reg-ref,.guide-toc,.tool-form{display:none!important}.tool-layout{margin:0!important;display:block!important}.results-container{width:100%!important;max-width:100%!important;margin:0!important;padding:0!important}.results-panel{color:#000!important;box-shadow:none!important;background:#fff!important;border:none!important;margin:0!important;padding:0!important}.results-header{display:none!important}.headline-box{break-inside:avoid;page-break-inside:avoid;background:#f8fafc!important;border:1px solid #cbd5e1!important;grid-template-columns:repeat(3,1fr)!important;gap:.5rem!important;margin-bottom:.65rem!important;padding:.5rem .75rem!important;display:grid!important}.headline-item{padding:0!important}.headline-label{color:#475569!important;font-size:7.5pt!important}.headline-value{color:#0f172a!important;font-size:12pt!important;font-weight:700!important}.headline-note{color:#64748b!important;font-size:7pt!important}.working-flow{margin:0!important}.working-title{color:#0f172a!important;border-bottom:1px solid #cbd5e1!important;margin:0 0 .4rem!important;padding-bottom:2px!important;font-size:9.5pt!important}.step-card{break-inside:avoid;page-break-inside:avoid;background:#fff!important;border:1px solid #e2e8f0!important;margin-bottom:.35rem!important;padding:.35rem .55rem!important}.step-num{font-size:7pt!important;font-weight:700!important}.step-body h4{color:#0f172a!important;margin:0 0 .15rem!important;font-size:8.5pt!important}.step-formula,.step-calc{color:#0f172a!important;background:#f1f5f9!important;margin:.15rem 0!important;padding:.15rem .35rem!important;font-size:8pt!important}.step-desc{color:#334155!important;margin:.15rem 0!important;font-size:7.5pt!important;line-height:1.25!important}.factors-table{grid-template-columns:repeat(2,1fr)!important;gap:.2rem .6rem!important;display:grid!important}.factor-row{background:#f8fafc!important;border:1px solid #e2e8f0!important;padding:.15rem .35rem!important;font-size:7pt!important}.vd-stats-grid{grid-template-columns:repeat(3,1fr)!important;gap:.3rem!important;margin-top:.2rem!important;display:grid!important}.vd-stat{background:#f8fafc!important;border:1px solid #e2e8f0!important;padding:.15rem .3rem!important;font-size:7pt!important}.table-ref-list{margin:.15rem 0!important;padding-left:1rem!important;font-size:7pt!important;line-height:1.25!important}.print-certificate-header{break-inside:avoid;page-break-inside:avoid;border-bottom:2px solid #0f172a!important;margin-bottom:.6rem!important;padding-bottom:.4rem!important;display:block!important}.print-certificate-title{letter-spacing:.02em!important;color:#0f172a!important;margin:0 0 .1rem!important;font-size:12pt!important;font-weight:700!important}.print-certificate-subtitle{color:#334155!important;margin:0 0 .4rem!important;font-size:8.5pt!important;font-weight:500!important}.print-meta-grid{background:#f8fafc!important;border:1px solid #cbd5e1!important;grid-template-columns:repeat(3,1fr)!important;gap:.25rem .6rem!important;margin:0!important;padding:.35rem .5rem!important;display:grid!important}.print-meta-grid dt{text-transform:uppercase!important;color:#475569!important;font-size:6pt!important;font-weight:700!important}.print-meta-grid dd{color:#0f172a!important;margin:0 0 .15rem!important;font-size:7.5pt!important;font-weight:600!important}.print-sign-off-block{break-inside:avoid;page-break-inside:avoid;border-top:1.5px solid #0f172a!important;margin-top:.6rem!important;padding-top:.4rem!important;display:block!important}.print-compliance-statement{color:#334155!important;background:#f8fafc!important;border:1px solid #e2e8f0!important;margin-bottom:.4rem!important;padding:.3rem .45rem!important;font-size:7pt!important;line-height:1.3!important}.print-signatures-grid{grid-template-columns:1fr 1fr!important;gap:.35rem 1.25rem!important;display:grid!important}.sign-line{flex-direction:column!important;gap:2px!important;display:flex!important}.sign-label{text-transform:uppercase!important;color:#475569!important;font-size:6pt!important;font-weight:700!important}.sign-dotted{color:#0f172a!important;border-bottom:1px dotted #94a3b8!important;height:14px!important;font-size:7.5pt!important;display:block!important}.mono{color:#000!important;font-weight:700!important}.passfail.pass{color:#065f46!important;background:#ecfdf5!important;border:1px solid #10b981!important;padding:.2rem .4rem!important;font-size:7.5pt!important}.passfail.fail{color:#991b1b!important;background:#fef2f2!important;border:1px solid #ef4444!important;padding:.2rem .4rem!important;font-size:7.5pt!important}a{color:#000!important;text-decoration:none!important}}.preset-container{background:var(--surface-raised,#1c1c2b);border:1px solid var(--line-subtle,#26263a);border-radius:var(--radius,8px);margin-bottom:1.25rem;padding:.75rem 1rem}[data-theme=light] .preset-container{background:var(--surface-raised,#f1f0f7);border-color:var(--line-subtle,#e4e3ee)}.preset-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.6rem;display:flex}.preset-title{color:var(--text-primary);align-items:center;gap:.35rem;font-size:.85rem;font-weight:600;display:flex}.preset-icon{color:var(--accent)}[data-theme=light] .preset-icon{color:var(--brand)}.preset-hint{color:var(--text-secondary);font-size:.75rem}.preset-strip{scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:thin;gap:.5rem;padding-bottom:.35rem;display:flex;overflow-x:auto}.preset-chip{scroll-snap-align:start;background:var(--card-surface,#1a1a28);min-height:44px;color:var(--text-primary);border:1px solid var(--line-strong,#3b3b58);cursor:pointer;user-select:none;touch-action:manipulation;border-radius:22px;flex:none;align-items:center;gap:.4rem;padding:.35rem .85rem;font-size:.85rem;font-weight:500;transition:all .15s ease-in-out;display:inline-flex}[data-theme=light] .preset-chip{background:var(--card-surface,#fff);border-color:var(--line-strong,#c9c8da)}.preset-chip:hover{border-color:var(--accent);background:color-mix(in srgb, var(--accent) 12%, var(--card-surface))}.preset-chip[aria-pressed=true]{background:var(--brand);color:var(--brand-on-fill,#fff);border-color:var(--brand);font-weight:600}.preset-chip[aria-pressed=true] .chip-label:before{content:"✓ ";font-weight:700}.chip-badge{text-transform:uppercase;letter-spacing:.04em;background:var(--badge-bg,#ffffff14);color:var(--text-secondary);border-radius:4px;padding:.15rem .4rem;font-size:.65rem}.preset-chip[aria-pressed=true] .chip-badge{color:#fff;background:#ffffff40}.preset-active-info{color:var(--text-secondary);border-top:1px dashed var(--line-subtle);flex-wrap:wrap;justify-content:space-between;gap:.5rem;min-height:1.4rem;margin-top:.5rem;padding-top:.45rem;font-size:.8rem;display:flex}.preset-stat-ref{color:var(--brand);font-weight:500}.apprentice-tooltip-wrap{vertical-align:middle;align-items:center;margin-left:.35rem;display:inline-flex;position:relative}.apprentice-tip-btn{cursor:pointer;width:24px;min-width:44px;height:24px;min-height:44px;color:var(--text-secondary);touch-action:manipulation;user-select:none;background:0 0;border:none;outline:none;justify-content:center;align-items:center;padding:0;display:inline-flex}.tip-icon{color:var(--accent);font-size:.95rem;font-weight:700;line-height:1;transition:transform .15s,color .15s}.apprentice-tip-btn:hover .tip-icon,.apprentice-tip-btn:focus-visible .tip-icon{color:var(--brand);transform:scale(1.15)}.apprentice-popover{background:var(--surface-raised);border:1px solid var(--line-strong);z-index:50;text-align:left;width:min(280px,80vw);color:var(--text-primary);border-radius:8px;padding:.65rem .85rem;font-size:.82rem;line-height:1.4;display:none;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);box-shadow:0 10px 25px -5px #0006}.apprentice-popover:after{content:"";border:6px solid #0000;border-top-color:var(--line-strong);position:absolute;top:100%;left:50%;transform:translate(-50%)}.apprentice-popover.active{animation:.15s ease-out tipFade;display:block}@keyframes tipFade{0%{opacity:0;transform:translate(-50%,4px)}to{opacity:1;transform:translate(-50%)}}.popover-header{border-bottom:1px solid var(--line-subtle);justify-content:space-between;align-items:baseline;gap:.5rem;margin-bottom:.35rem;padding-bottom:.3rem;display:flex}.popover-title{color:var(--text-primary);font-size:.82rem;font-weight:600}.popover-symbol{color:var(--accent);font-size:.75rem;font-weight:700}.popover-body{color:var(--text-secondary);margin-bottom:.4rem;font-size:.78rem;display:block}.popover-ref{color:#eab308;text-transform:uppercase;letter-spacing:.03em;font-size:.7rem;font-weight:600;display:block}@media (width<=640px){.preset-container{margin-left:-.25rem;margin-right:-.25rem;padding:.6rem .75rem}.preset-chip{min-height:48px;font-size:.88rem}.apprentice-popover{width:260px;left:auto;right:-10px;transform:none}.apprentice-popover:after{left:auto;right:22px;transform:none}}.instrument-readout{border-radius:var(--radius,8px);background:#0c1017;border:1px solid #ffffff1f;margin:1rem 0;padding:clamp(.9rem,3vw,1.25rem);position:relative;overflow:hidden;box-shadow:inset 0 2px 6px #00000080,0 4px 14px #00000040}[data-theme=light] .instrument-readout{background:#f8fafc;border-color:#cbd5e1;box-shadow:inset 0 1px 3px #00000014,0 2px 8px #0000000d}.instrument-header{justify-content:space-between;align-items:center;gap:.5rem;margin-bottom:.4rem;display:flex}.instrument-label{letter-spacing:.05em;text-transform:uppercase;color:#94a3b8;font-size:.78rem;font-weight:700}[data-theme=light] .instrument-label{color:#475569}.instrument-display{flex-wrap:wrap;align-items:baseline;gap:.35rem;display:flex}.instrument-value{font-family:var(--font-mono,ui-monospace, monospace);color:#f8fafc;font-variant-numeric:tabular-nums;letter-spacing:-.02em;font-size:clamp(2rem,5.5vw,2.75rem);font-weight:700;line-height:1.1}[data-theme=light] .instrument-value{color:#0f172a}.instrument-unit{font-family:var(--font-mono,ui-monospace, monospace);color:#38bdf8;margin-left:.15rem;font-size:1.25rem;font-weight:600}[data-theme=light] .instrument-unit{color:#0369a1}.instrument-badge{letter-spacing:.02em;border-radius:6px;align-items:center;gap:.4rem;min-height:36px;margin-top:.65rem;padding:.35rem .75rem;font-size:.88rem;font-weight:700;line-height:1.2;display:inline-flex}.instrument-badge.pass{color:#4ade80;background:#22c55e26;border:1px solid #4ade8059}[data-theme=light] .instrument-badge.pass{color:#15803d;background:#dcfce7;border-color:#86efac}.instrument-badge.warn{color:#fbbf24;background:#f59e0b26;border:1px solid #fbbf2459}[data-theme=light] .instrument-badge.warn{color:#b45309;background:#fef3c7;border-color:#fde68a}.instrument-badge.fail{color:#f87171;background:#ef444426;border:1px solid #f8717159}[data-theme=light] .instrument-badge.fail{color:#b91c1c;background:#fee2e2;border-color:#fca5a5}.segmented-chip-group{margin-bottom:1.1rem}.segmented-chip-legend{color:var(--text-primary);margin-bottom:.45rem;font-size:.9rem;font-weight:600;display:block}.segmented-chips{background:var(--bg-base);border:1px solid var(--line-subtle);border-radius:var(--radius,8px);flex-wrap:wrap;gap:.5rem;padding:.35rem;display:flex}.segmented-chip-item{flex:calc(33.333% - .5rem);min-width:85px;margin:0;position:relative}.segmented-chip-input{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.segmented-chip-label{text-align:center;background:var(--surface-raised);min-height:48px;color:var(--text-secondary);cursor:pointer;user-select:none;border:1px solid #0000;border-radius:6px;flex-direction:column;justify-content:center;align-items:center;padding:.45rem .65rem;font-size:.88rem;font-weight:600;transition:all .15s ease-in-out;display:flex}.segmented-chip-label:hover{color:var(--text-primary);background:color-mix(in srgb, var(--surface-raised) 80%, var(--brand) 20%)}.segmented-chip-input:focus-visible+.segmented-chip-label{outline:2px solid var(--focus-ring,#22d3ee);outline-offset:2px}.segmented-chip-input:checked+.segmented-chip-label{background:var(--brand,#8b80cb);color:var(--brand-on-fill,#14141f);border-color:var(--brand-strong,#9a8fd9);box-shadow:0 2px 6px #00000040}[data-theme=light] .segmented-chip-input:checked+.segmented-chip-label{background:var(--brand,#4a3f8c);color:#fff;border-color:var(--brand-strong,#3b3273)}.segmented-chip-sub{opacity:.85;margin-top:.1rem;font-size:.72rem;font-weight:500}.device-context-pill{color:#38bdf8;background:#38bdf81f;border:1px solid #38bdf840;border-radius:9999px;align-items:center;gap:.35rem;padding:.2rem .55rem;font-size:.75rem;font-weight:600;line-height:1;display:inline-flex}[data-theme=light] .device-context-pill{color:#0369a1;background:#e0f2fe;border-color:#bae6fd}.device-context-pill--widescreen{color:#c084fc;background:#a855f71f;border-color:#a855f740}[data-theme=light] .device-context-pill--widescreen{color:#7e22ce;background:#f3e8ff;border-color:#d8b4fe}