:root{--color-fg:#182339;--color-bg:#f5f7fb;--color-muted:#58677d;--color-accent:#1269cf;--color-on-accent:#fff;--color-border:#dce4ee;--color-accent-tint:#e5f2ff;--color-ok:#047857;--color-ok-tint:#d1fae5;--color-warn:#c2410c;--color-warn-tint:#ffedd5;--color-danger:#be123c;--color-danger-tint:#ffe4e6;--color-info:#0369a1;--color-info-tint:#e0f2fe;--color-neutral:#58677d;--color-neutral-tint:#eef2f8;--code-var:#2563eb;--code-const:#9333ea;--code-op:#0f766e;--code-unit:#c2410c;--code-result:#be185d;--code-term:#0369a1;--chart-1:#0891b2;--chart-2:#2563eb;--chart-3:#f97316;--chart-4:#a855f7;--chart-5:#16a34a;--chart-6:#ec4899;--surface-base:#f5f7fb;--surface-panel:#fff;--surface-raised:#fff;--surface-control:#f0f4fa;--surface-hover:#e8eff8;--border-default:#dce4ee;--border-strong:#a6b6c9;--border-subtle:#e8edf4;--border-control:#cbd8e7;--shadow-sm:0 1px 2px #1018280f;--shadow-flyout:0 6px 20px #1018281f;--shadow-overlay:0 12px 48px #1018282e;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-dialog:16px;--radius-xl:16px;--elevation-1:0 1px 2px #0f172a0d;--elevation-2:0 12px 28px -18px #0f172a47;--control-surface:var(--surface-control);--control-border:var(--border-control);--control-divider:var(--border-subtle);--menu-surface:var(--surface-raised);--menu-border:var(--border-default);--menu-shadow:0 16px 40px -12px #0f172a66;--menu-item-radius:8px;--segmented-track:var(--surface-control);--segmented-active-bg:var(--color-accent);--segmented-active-fg:var(--color-on-accent);--space-1:.25rem;--space-2:.5rem;--space-3:1rem;--space-4:1.5rem;--space-5:2rem;--space-6:3rem;--z-base:0;--z-sticky:100;--z-dropdown:200;--z-dialog:300;--z-toast:400;--motion-fast:.12s;--motion-base:.2s;--motion-slow:.32s;--ease-standard:cubic-bezier(.2,0,0,1);--ease-emphasized:cubic-bezier(.3,0,0,1);--font-size-base:16px;--font-size-xs:.75rem;--font-size-sm:.875rem;--font-size-lg:1.125rem;--font-size-xl:1.375rem;--font-size-2xl:1.75rem;--font-size-3xl:2.25rem;--font-size-display:2.75rem;--font-family-sans:system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-family-mono:ui-monospace, "SF Mono", Menlo, Consolas, monospace;--font-weight-regular:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--font-weight-extrabold:800;--font-leading-tight:1.1;--font-leading-snug:1.25;--font-leading-normal:1.5;--font-leading-relaxed:1.65}[data-theme=dark]{--color-fg:#f1f5fb;--color-bg:#111822;--color-muted:#b1bece;--color-accent:#7bbcff;--color-on-accent:#0b1113;--color-border:#3b4a5c;--color-accent-tint:#193a5b;--color-ok:#34d399;--color-ok-tint:#0d3325;--color-warn:#fb923c;--color-warn-tint:#3a2410;--color-danger:#fb7185;--color-danger-tint:#3a1620;--color-info:#38bdf8;--color-info-tint:#0c3048;--color-neutral:#b1bece;--color-neutral-tint:#283545;--code-var:#38bdf8;--code-const:#d8b4fe;--code-op:#2dd4bf;--code-unit:#fb923c;--code-result:#f0abfc;--code-term:#7dd3fc;--chart-1:#22d3ee;--chart-2:#3b82f6;--chart-3:#fb923c;--chart-4:#e879f9;--chart-5:#4ade80;--chart-6:#fb7185;--surface-base:#111822;--surface-panel:#1d2836;--surface-raised:#223043;--surface-control:#283545;--surface-hover:#304154;--border-default:#3b4a5c;--border-strong:#5e7187;--border-subtle:#334356;--border-control:#4b5d70;--shadow-sm:0 1px 2px #00000080;--shadow-flyout:0 6px 20px #00000080;--shadow-overlay:0 12px 48px #0009;--elevation-1:0 1px 2px #00000080;--elevation-2:0 18px 40px -18px #000000b3;--menu-shadow:0 20px 48px -12px #000000b3}[data-category=hvac]{--color-accent:#1d4ed8;--color-accent-tint:#eef4fe}[data-theme=dark][data-category=hvac]{--color-accent:#58a6ff;--color-accent-tint:#0f2436}[data-category=construction]{--color-accent:#b45309;--color-accent-tint:#fef3e2}[data-theme=dark][data-category=construction]{--color-accent:#f59e0b;--color-accent-tint:#2a1c07}[data-category=statistics]{--color-accent:#6d28d9;--color-accent-tint:#f3eefe}[data-theme=dark][data-category=statistics]{--color-accent:#a78bfa;--color-accent-tint:#1e1533}.p-field{gap:var(--space-1);flex-direction:column;display:flex}.p-field label,.p-field__label{color:var(--color-muted);font-size:.78rem;font-weight:600}.p-field__row{gap:var(--space-2);align-items:stretch;display:flex}.unit-menu{font:inherit;color:var(--color-fg);background:var(--control-surface);border:1px solid var(--control-border);border-radius:var(--radius-lg);padding:var(--space-2) var(--space-3);transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard)}.unit-menu:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-accent-tint);outline:none}.p-note{color:var(--color-muted);background:var(--control-surface);border:1px solid var(--control-border);border-radius:var(--radius-lg);padding:var(--space-2) var(--space-3);font-size:.9rem}.is-find-answer,label:has(.is-find-answer) .is-find-answer{color:var(--color-accent);font-family:var(--font-family-mono);font-weight:var(--font-weight-extrabold)}label:has(.is-find-answer) .is-find-answer{box-shadow:none;cursor:default;background:0 0;border-color:#0000}label:has(.is-find-answer){outline:2px solid var(--color-accent);outline-offset:4px;border-radius:var(--radius-lg);background:var(--color-accent-tint);transition:outline-color var(--motion-base) var(--ease-emphasized), background var(--motion-base) var(--ease-emphasized)}label:has(.is-find-answer)>span:after{content:"= the answer";border-radius:var(--radius-lg);font-family:var(--font-family-sans);font-size:.68rem;font-weight:var(--font-weight-bold);letter-spacing:.01em;color:var(--color-accent);background:var(--color-accent-tint);border:1px solid var(--color-accent);margin-left:.5ch;padding:.05rem .45rem}[data-find-mode=reverse] .results div:has(.is-find-target) dt:after{content:" — type your target here";color:var(--color-accent);font-weight:var(--font-weight-semibold)}[data-find-mode=reverse] .is-find-target{color:var(--color-fg);font-weight:var(--font-weight-semibold);outline:2px solid var(--color-accent);outline-offset:2px;border-radius:var(--radius-md)}.p-card{background:var(--surface-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--elevation-1), var(--elevation-2);padding:var(--space-4)}.p-btn{background:var(--accent-gradient,var(--color-accent));color:var(--color-on-accent);border-radius:var(--radius-lg);padding:var(--space-2) var(--space-3);font-size:var(--font-size-base);box-shadow:var(--elevation-1);transition:background var(--motion-fast) var(--ease-standard);cursor:pointer;border:0;font-weight:600}.p-btn:hover{filter:brightness(1.05)}.btn-share,.icon-btn{cursor:pointer;width:2.25rem;height:2.25rem;color:var(--color-accent);background:var(--control-surface);border:1px solid var(--control-border);border-radius:var(--radius-lg);justify-content:center;align-items:center;padding:0;line-height:0;display:inline-flex}.btn-share:hover,.icon-btn:hover{background:var(--surface-hover)}.btn-share:focus-visible,.icon-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}.p-btn--ghost{background:var(--control-surface);color:var(--color-fg);border:1px solid var(--control-border);box-shadow:none}.p-input{background:var(--control-surface);color:var(--color-fg);border:1px solid var(--control-border);border-radius:var(--radius-lg);padding:var(--space-2) var(--space-3);font-size:var(--font-size-base);font-variant-numeric:tabular-nums;transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard)}.p-input:focus{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-accent-tint);outline:none}.p-dialog{background:var(--surface-raised);border:1px solid var(--border-strong);border-radius:var(--radius-dialog);box-shadow:var(--shadow-overlay);padding:var(--space-4);max-width:32rem}.p-table-scroll{border:1px solid var(--border-subtle);border-radius:var(--radius-lg);overflow-x:auto}.p-table{border-collapse:collapse;width:100%}.p-table th,.p-table td{border-bottom:1px solid var(--control-divider);padding:var(--space-2) var(--space-3);text-align:left}.p-table th{background:var(--control-surface);color:var(--color-muted);letter-spacing:.02em;font-size:.78rem;font-weight:600}.p-table td{color:var(--color-fg)}.p-table tbody tr:hover td{background:var(--surface-hover)}.p-table tbody tr:last-child td{border-bottom:0}.p-fieldgroup{background:var(--surface-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--elevation-1), var(--elevation-2);overflow:hidden}.p-fieldgroup+.p-fieldgroup{margin-top:var(--space-3)}.p-fieldgroup__summary{align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);cursor:pointer;color:var(--color-fg);user-select:none;transition:background var(--motion-fast) var(--ease-standard);list-style:none;display:flex}.p-fieldgroup__summary::-webkit-details-marker{display:none}.p-fieldgroup__summary:hover{background:var(--surface-hover)}.p-fieldgroup__summary:focus-visible{outline:2px solid var(--color-accent);outline-offset:-2px}.p-fieldgroup__accent{background:var(--color-accent);border-radius:999px;flex:none;width:4px;height:22px}.p-fieldgroup__label{letter-spacing:-.01em;flex:1;font-size:1rem;font-weight:650}.p-fieldgroup[open]>.p-fieldgroup__summary{border-bottom:1px solid var(--border-subtle)}.p-fieldgroup__chevron{color:var(--color-accent);transition:transform var(--motion-fast) var(--ease-standard);flex:none}.p-fieldgroup[open]>.p-fieldgroup__summary .p-fieldgroup__chevron{transform:rotate(180deg)}.p-fieldgroup__body{gap:var(--space-3);padding:var(--space-4);flex-direction:column;display:flex}@media 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.p-unitfield__input--part{flex:auto;width:auto;min-width:0}.p-unitfield__part-unit{color:var(--color-muted);white-space:nowrap;padding:0 6px 0 2px;font-size:.85em}.p-unitfield__sep{background:var(--control-divider);width:1px;margin:8px 0}.p-unitfield__unit{color:var(--color-fg);font:inherit;cursor:pointer;transition:background var(--motion-fast) var(--ease-standard);background:0 0;border:0;align-items:center;gap:8px;padding:0 16px 0 14px;font-size:.92rem;font-weight:600;display:inline-flex}.p-unitfield__unit svg{color:var(--color-muted);transition:transform var(--motion-fast) var(--ease-standard)}.p-unitfield__unit:hover,.p-unitfield__unit.is-open{background:var(--surface-hover)}.p-unitfield__unit.is-open svg{color:var(--color-accent);transform:rotate(180deg)}.p-unitfield__unit[hidden]{display:none}.p-unitfield__unit-static{color:var(--color-muted);font:inherit;align-items:center;padding:0 16px 0 14px;font-size:.92rem;font-weight:600;display:inline-flex}.p-menu{border:1px solid var(--menu-border);border-radius:var(--radius-lg);background:var(--menu-surface);box-shadow:var(--menu-shadow);margin-top:8px;padding:6px}.p-menu ul{margin:0;padding:0;list-style:none}.p-menu li{border-radius:var(--menu-item-radius);color:var(--color-fg);cursor:pointer;justify-content:space-between;align-items:center;padding:9px 12px;font-size:.95rem;font-weight:600;display:flex}.p-menu li:hover{background:var(--surface-hover)}.p-menu li.is-active{color:var(--color-accent);background:var(--color-accent-tint)}.p-menu--unit{z-index:var(--z-dropdown);min-width:160px;max-width:200px;position:absolute;top:100%;right:0}@media (prefers-reduced-motion:reduce){.p-unitfield,.p-unitfield__unit,.p-unitfield__unit svg{transition:none}}.p-exportmenu{display:inline-block;position:relative}.p-datatable__toolbar{padding:var(--space-1) var(--space-2);background:var(--surface-raised);border:1px solid var(--border-subtle);border-radius:var(--radius-lg) var(--radius-lg) 0 0;border-bottom:0;justify-content:flex-end;align-items:center;display:flex}.p-datatable__toolbar+.p-table-scroll{border-top-left-radius:0;border-top-right-radius:0}.p-datatable__toolbar .p-exportmenu__trigger{color:var(--color-muted);box-shadow:none;border-radius:var(--radius-sm);background:0 0;padding:6px 8px;font-size:.8rem}.p-datatable__toolbar .p-exportmenu__trigger:hover{color:var(--color-fg);background:var(--surface-hover)}.p-exportmenu__trigger{font:inherit;color:var(--color-on-accent);background:var(--color-accent);border-radius:var(--radius-lg);cursor:pointer;box-shadow:var(--elevation-1);border:0;align-items:center;gap:8px;padding:10px 14px;font-size:.92rem;font-weight:600;display:inline-flex}.p-exportmenu__trigger svg:last-child{transition:transform var(--motion-fast) var(--ease-standard)}.p-exportmenu__trigger.is-open svg:last-child{transform:rotate(180deg)}.p-exportmenu__menu{width:280px;z-index:var(--z-dropdown);position:absolute;top:calc(100% + 8px);right:0}.p-menu__label{letter-spacing:.05em;text-transform:uppercase;color:var(--color-muted);padding:8px 10px 4px;font-size:.68rem;font-weight:700}.p-menu__ext{color:var(--color-muted);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.78rem;font-weight:600}@media (prefers-reduced-motion:reduce){.p-exportmenu__trigger svg:last-child{transition:none}}.p-recordtable .p-table{font-size:.92rem}.p-recordtable th,.p-recordtable td{white-space:nowrap}.p-recordtable td{font-variant-numeric:tabular-nums}.p-recordtable td.p-recordtable__out{background:var(--color-accent-tint);font-weight:700}.p-recordtable th.p-recordtable__out{color:var(--color-accent);background:var(--color-accent-tint)}.p-recordtable tr.is-latest td{box-shadow:inset 3px 0 0 var(--color-accent)}.p-recordtable tr.is-stale td{color:var(--color-muted)}.p-recordtable tr.is-stale .p-recordtable__out:after{content:"*"}.calc-history__actions button{font:inherit;font-size:.8rem}.p-select-wrap{position:relative}.p-select__trigger{background:var(--control-surface);border:1px solid var(--control-border);border-radius:var(--radius-lg);width:100%;min-height:var(--control-min-height,3.25rem);box-sizing:border-box;font:inherit;color:var(--color-fg);cursor:pointer;transition:border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);justify-content:space-between;align-items:center;padding:12px 14px;font-size:1rem;font-weight:600;display:flex}.p-select__trigger.is-open{border-color:var(--color-accent);box-shadow:0 0 0 3px var(--color-accent-tint)}.p-select__trigger svg{color:var(--color-muted);transition:transform var(--motion-fast) var(--ease-standard)}.p-select__trigger.is-open svg{color:var(--color-accent);transform:rotate(180deg)}.p-select__trigger[hidden]{display:none}.p-select__menu{width:100%;z-index:var(--z-dropdown);position:absolute;top:100%;left:0}.p-select__search 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.55rem;display:inline-flex}.p-status[hidden]{display:none}.p-status__dot{background:currentColor;border-radius:50%;flex:none;width:.5rem;height:.5rem}.p-status--ok{color:var(--color-ok);background:var(--color-ok-tint)}.p-status--warn{color:var(--color-warn);background:var(--color-warn-tint)}.p-status--danger{color:var(--color-danger);background:var(--color-danger-tint)}.p-status--info{color:var(--color-info);background:var(--color-info-tint)}.p-status--neutral{color:var(--color-neutral);background:var(--color-neutral-tint)}.p-segmented{background:var(--segmented-track);border:1px solid var(--control-border);border-radius:var(--radius-lg);gap:2px;padding:3px;display:inline-flex}.p-segmented--full{display:flex}.p-segmented--full .p-segmented__btn{flex:1}.p-segmented__btn{color:var(--color-muted);font:inherit;border-radius:var(--radius-md);cursor:pointer;transition:background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);background:0 0;border:0;padding:8px 14px;font-size:.9rem;font-weight:600}.p-segmented__btn:hover{color:var(--color-fg)}.p-segmented__btn.is-active{background:var(--segmented-active-bg);color:var(--segmented-active-fg);box-shadow:var(--elevation-1)}@media (prefers-reduced-motion:reduce){.p-segmented__btn{transition:none}}.p-align-left{text-align:left}.p-align-right{text-align:right}.p-align-center{text-align:center}.p-select-wrap>.p-select__native{clip-path:inset(50%);width:1px;height:1px;position:absolute;overflow:hidden}.p-select__menu ul{max-height:15rem;overflow-y:auto}:root{--accent-gradient:linear-gradient(110deg, var(--color-accent), var(--code-const));--page-glow:var(--color-accent-tint);--page-glow-second:var(--color-ok-tint)}html body{background:radial-gradient(circle at 8% 0%, var(--page-glow), transparent 32rem), radial-gradient(circle at 92% 13%, var(--page-glow-second), transparent 28rem), var(--color-bg)}html .site-header{background:color-mix(in srgb, var(--surface-panel) 92%, transparent);backdrop-filter:blur(16px)saturate(1.15)}html .site-header .brand{letter-spacing:-.035em;align-items:center;gap:.65rem;font-weight:800;display:inline-flex}html .site-header .brand:before{content:"";background:var(--accent-gradient);width:1.75rem;height:1.75rem;box-shadow:var(--elevation-2);border-radius:.6rem}html .calc-page>h1{border:1px solid var(--border-subtle);border-radius:calc(var(--radius-xl) + .5rem);background:radial-gradient(circle at 90% 15%, var(--color-accent-tint), transparent 40%), radial-gradient(circle at 5% 95%, var(--color-ok-tint), transparent 36%), var(--surface-raised);box-shadow:var(--elevation-1), var(--elevation-2);letter-spacing:-.045em;padding:clamp(1.25rem,3.5vw,2.5rem)}html .calc-main .calc{border-color:var(--border-default);background:linear-gradient(160deg, var(--color-accent-tint), var(--surface-raised) 10rem)}html .calc-main .result-card{border-color:var(--border-default);border-left-color:var(--color-accent);background:linear-gradient(125deg, var(--color-accent-tint), var(--surface-raised) 75%);box-shadow:var(--elevation-1), var(--elevation-2)}html :is(.p-card,.calc,.result-card){box-shadow:var(--elevation-1), var(--elevation-2)}@media (prefers-reduced-transparency:reduce){html .site-header{background:var(--surface-panel);backdrop-filter:none}}