.qta-cols{background: var(--surface);border: 1px solid var(--line);border-radius: var(--rad-l);padding: 14px 20px;box-shadow: var(--lift-1)}.qta-cols .oklist__list li{border-top: 1px solid var(--line);padding: 11px 0}.qta-cols .oklist__list li:first-child{border-top: 0}@media (min-width: 720px){.qta-cols{padding: 10px 28px}.qta-cols .oklist__list{grid-template-columns: repeat(2,minmax(0,1fr));column-gap: 40px}.qta-cols .oklist__list li:nth-child(2){border-top: 0}}.qta-links{display: flex;flex-wrap: wrap;gap: 14px 28px;margin: 28px 0 0}.qt-stack>.qta-links{margin-top: 0}.qta-sum{margin: 0;background: var(--surface);border: 1px solid var(--line);border-radius: var(--rad-l);padding: 20px 22px;box-shadow: var(--lift-2)}.qta-sum__title{margin: 0 0 8px;font-weight: 700;color: var(--tx);letter-spacing: -.015em;line-height: 1.35}.qta-sum__rows{margin: 0;font-variant-numeric: tabular-nums}.qta-sum__row{display: flex;justify-content: space-between;align-items: baseline;gap: 16px;padding: 11px 0;border-top: 1px dashed var(--line-2)}.qta-sum__row:first-child{border-top: 0}.qta-sum__row dt{display: flex;align-items: baseline;gap: 10px;color: var(--tx-2);line-height: 1.4;min-width: 0}.qta-sum__row dd{margin: 0;font-weight: 650;color: var(--tx);white-space: nowrap}.qta-sum__op{display: inline-grid;place-items: center;flex: none;width: 22px;height: 22px;border-radius: 6px;background: var(--well);color: var(--tx-soft);font-weight: 700;font-size: .875rem;line-height: 1;transform: translateY(-1px)}.qta-sum__row--plain dd{font-variant-numeric: proportional-nums}.qta-sum__row--total{margin-top: 2px;border-top: 2px solid var(--tx)}.qta-sum__row--total dt,.qta-sum__row--total dd{color: var(--tx);font-weight: 750;font-size: 1.0625rem}.qta-sum__row--total .qta-sum__op{background: var(--tx);color: var(--surface)}.qta-sum__vs{display: flex;flex-wrap: wrap;justify-content: space-between;align-items: baseline;gap: 4px 16px;margin: 14px 0 0;padding: 12px 14px;background: var(--well);border-radius: var(--rad-s);color: var(--tx-2);line-height: 1.4}.qta-sum__vs strong{color: var(--tx);font-weight: 750;font-variant-numeric: tabular-nums;white-space: nowrap}.qta-sum__note{margin: 12px 0 0;font-size: .875rem;line-height: 1.5;color: var(--tx-soft)}@media (max-width: 479px){.qta-sum{padding: 18px 16px}.qta-sum__row{flex-direction: column;gap: 2px}.qta-sum__row dd{white-space: normal}.qta-sum__row--op dd{padding-left: 32px}}.qta-pair{margin: 0;display: grid;gap: 24px;align-items: start}@media (min-width: 960px){.qta-pair{grid-template-columns: minmax(0,1.12fr) minmax(0,1fr);gap: clamp(36px,4vw,56px)}}.qta-pair__art{background: var(--surface);border: 1px solid var(--line);border-radius: var(--rad-l);padding: clamp(12px,2vw,22px);box-shadow: var(--lift-2)}@media (min-width: 960px){.qta-pair__art{position: sticky;top: calc(var(--hdr-h) + 24px)}}.qta-pair__art svg{width: 100%;height: auto;color: var(--tx);fill: none;stroke: currentColor;stroke-width: 2.5;stroke-linecap: round;stroke-linejoin: round}.qta-pair__art .qta-p-fill{fill: var(--ifill)}.qta-pair__art .qta-p-well{fill: var(--well);stroke: var(--line-2)}.qta-pair__art .qta-p-wall{stroke: var(--line-2);stroke-width: 6}.qta-pair__art .qta-p-ground{stroke: var(--line-2);stroke-width: 3}.qta-pair__art .qta-p-line{stroke: var(--tx);stroke-width: 4}.qta-pair__art .qta-p-line--b{stroke: var(--tx-soft)}.qta-pair__art .qta-p-wire{stroke: var(--faint);stroke-width: 2;stroke-dasharray: 5 6}.qta-pair__art .qta-p-lbl{fill: var(--tx-soft);stroke: none;font: 600 15px var(--font);letter-spacing: .01em}@media (max-width: 559px){.qta-pair__art .qta-p-lbl{font-size: 24px}}.qta-pair__art .qta-p-mk circle{fill: var(--tx);stroke: var(--surface);stroke-width: 3}.qta-pair__art .qta-p-mk text{fill: var(--surface);stroke: none;font: 700 17px var(--font);font-variant-numeric: tabular-nums}.qta-pair__key{list-style: none;display: grid}.qta-pair__key li{display: grid;grid-template-columns: 30px minmax(0,1fr);gap: 14px;padding: 14px 0;border-top: 1px solid var(--line)}.qta-pair__key li:first-child{border-top: 0;padding-top: 0}.qta-pair__key p{margin: 0;color: var(--tx-soft);font-size: .9688rem;line-height: 1.55}.qta-pair__key .qta-pair__t{color: var(--tx);font-weight: 650;font-size: 1.0313rem;margin-bottom: 2px}.qta-n{display: inline-grid;place-items: center;width: 28px;height: 28px;border-radius: 50%;background: var(--tx);color: var(--surface);font-weight: 700;font-size: .875rem;font-variant-numeric: tabular-nums;line-height: 1}.qta-spec{list-style: none;display: grid;gap: 12px}@media (min-width: 900px){.qta-spec{grid-template-columns: repeat(3,minmax(0,1fr));gap: 16px}}.qta-spec__card{background: var(--surface);border: 1px solid var(--line);border-radius: var(--rad-l);padding: 18px 20px 8px;box-shadow: var(--lift-1)}.qta-spec__head{display: flex;align-items: center;gap: 14px;padding-bottom: 14px;border-bottom: 2px solid var(--tx)}.qta-spec__head .glyph{flex: none}.qta-spec__t{margin: 0;font-size: 1.1563rem;letter-spacing: -.02em;line-height: 1.2}.qta-spec__sub{display: block;margin: 3px 0 0;font-size: .8438rem;font-weight: 500;letter-spacing: 0;color: var(--tx-soft)}.qta-spec__list{list-style: none}.qta-spec__list li{display: grid;grid-template-columns: 14px minmax(0,1fr);gap: 10px;padding: 10px 0;border-top: 1px solid var(--line);color: var(--tx-2);font-size: .9688rem;line-height: 1.45}.qta-spec__list li:first-child{border-top: 0}.qta-spec__list li::before{content: "";width: 8px;height: 8px;margin-top: .48em;border-radius: 2px;background: var(--tx)}.qt-fit .tbl table{min-width: 0}@media (max-width: 479px){.qt-fit .tbl th,.qt-fit .tbl td{padding: 10px 12px}}.qt-diagram{margin: 0;background: var(--surface);border: 1px solid var(--line);border-radius: var(--rad-l);padding: 18px 14px 16px;box-shadow: var(--lift-1);min-width: 0}@media (min-width: 560px){.qt-diagram{padding: 22px 24px 20px}}.qt-diagram svg{display: block;width: 100%;height: auto}.qt-diagram__title{margin: 0 0 12px;font-weight: 700;font-size: 1.0625rem;letter-spacing: -.02em;line-height: 1.3;color: var(--tx)}.qt-diagram figcaption{margin-top: 14px;padding-top: 12px;border-top: 1px solid var(--line);font-size: .875rem;line-height: 1.5;color: var(--tx-soft)}.qt-diagram__key{list-style: none;display: grid;gap: 8px;margin: 14px 0 0;padding: 0;font-size: .9063rem;line-height: 1.4;color: var(--tx-2)}.qt-diagram__key li{display: grid;grid-template-columns: 30px minmax(0,1fr);gap: 10px;align-items: center}.qt-diagram__sw{display: block;width: 30px;height: 0;border-top: 3.5px solid var(--good);border-radius: 2px}.qt-diagram__sw--loss{border-top: 2.5px dashed var(--tx)}.qt-diagram__sw--gap{height: 16px;border: 1px solid var(--warn);border-radius: 4px;background: var(--warn-bg)}.qt-bal text{font-family: var(--font)}.qt-bal__grid{stroke: var(--line);stroke-width: 1}.qt-bal__axis{stroke: var(--line-2);stroke-width: 1.5}.qt-bal__tick{fill: var(--tx-soft);font-size: 14px;font-weight: 500;font-variant-numeric: tabular-nums}.qt-bal__lbl{fill: var(--tx);font-size: 14.5px;font-weight: 650}.qt-bal__gap{fill: var(--warn-bg)}.qt-bal__gaplbl{fill: var(--warn);font-size: 15px;font-weight: 700}.qt-bal__loss{fill: none;stroke: var(--tx);stroke-width: 2.5;stroke-dasharray: 8 6}.qt-bal__cap{fill: none;stroke: var(--good);stroke-width: 3.5;stroke-linejoin: round;stroke-linecap: round}.qt-bal__spec{fill: var(--surface);stroke: var(--good);stroke-width: 2.5}.qt-bal__pt{fill: var(--tx);stroke: var(--surface);stroke-width: 2}.qt-bal__design{stroke: var(--tx-soft);stroke-width: 1.5;stroke-dasharray: 3 4}.qt-bal__lead{fill: none;stroke: var(--tx);stroke-width: 1.5}@media (max-width: 559px){.qt-bal__tick{font-size: 19px}.qt-bal__lbl,.qt-bal__gaplbl{font-size: 20px}}.qt-dl text{font-family: var(--font)}.qt-dl__room{fill: var(--well)}.qt-dl__wall{fill: var(--line-2)}.qt-dl__ground{stroke: var(--tx-2);stroke-width: 2;fill: none}.qt-dl__snow{fill: var(--surface);stroke: var(--line-2);stroke-width: 1.5}.qt-dl__snowline{stroke: var(--faint);stroke-width: 1.5;stroke-dasharray: 4 5;fill: none}.qt-dl__tag{fill: var(--tx-soft);font-size: 14px;font-weight: 600}.qt-dl__unit{fill: var(--surface);stroke: var(--tx);stroke-width: 2.5}.qt-dl__fan{fill: var(--ifill);stroke: var(--tx);stroke-width: 2}.qt-dl__detail{fill: none;stroke: var(--tx-2);stroke-width: 2;stroke-linecap: round}.qt-dl__line{fill: none;stroke: var(--tx-2);stroke-width: 5;stroke-linejoin: round}.qt-dl__cover{fill: var(--ifill);stroke: var(--tx);stroke-width: 2}.qt-dl__box{fill: var(--surface);stroke: var(--tx);stroke-width: 2}.qt-dl__stand{fill: none;stroke: var(--tx-2);stroke-width: 4;stroke-linecap: round}.qt-dl__air{fill: none;stroke: var(--faint);stroke-width: 2;stroke-dasharray: 2 6;stroke-linecap: round}.qt-dl__drain{fill: none;stroke: var(--tx-2);stroke-width: 2.5;stroke-dasharray: 5 4}.qt-dl__drop{fill: var(--tx-soft)}.qt-dl__n circle{fill: var(--tx);stroke: var(--surface);stroke-width: 2.5}.qt-dl__n text{fill: var(--surface);font-size: 13.5px;font-weight: 700;font-variant-numeric: tabular-nums}@media (max-width: 559px){.qt-dl__tag{font-size: 17px}.qt-dl__n text{font-size: 15px}}.qt-dl__key{list-style: none;display: grid;gap: 10px;margin: 16px 0 0;padding: 0}@media (min-width: 560px){.qt-dl__key{grid-template-columns: repeat(2,minmax(0,1fr));column-gap: 20px}}.qt-dl__key li{display: grid;grid-template-columns: 24px minmax(0,1fr);gap: 10px;align-items: start}.qt-dl__key p{margin: 0;font-size: .9063rem;line-height: 1.45;color: var(--tx-soft)}.qt-dl__key strong{color: var(--tx);font-weight: 650}.qt-dl__kn{display: grid;place-items: center;width: 24px;height: 24px;border-radius: 50%;background: var(--tx);color: var(--surface);font-size: .75rem;font-weight: 700;font-variant-numeric: tabular-nums;line-height: 1}.qt-wh-vs .vs__title{display: flex;align-items: center;gap: 12px}.qt-wh-vs .vs__title .glyph{flex: none;color: var(--tx)}.qt-wh-vs + .qt-duo{margin-top: clamp(32px,2vw + 20px,48px)}.qt-c .qt-copy + .tool{margin-top: 32px}.qt-c .tool + .qt-wh-how{margin-top: 14px}.qt-c .qt-wh-how + .strip{margin-top: 28px}[data-fq-tool="hot-water-sizer"] .tool__grid{align-items: start}[data-fq-tool="hot-water-sizer"] .field{align-content: start}.qt-wh-ticks{display: grid;column-gap: 20px}@media (min-width: 640px){.qt-wh-ticks{grid-template-columns: repeat(3,minmax(0,1fr))}}.qt-wh-out{display: grid;gap: 16px}.qt-wh-out .meter{margin: 18px 0 10px}.qt-wh-out .meter__band{opacity: .45}.qt-wh-key{font-size: .8125rem;color: var(--tx-soft)}.qt-wh-out .verdict__body .qt-wh-key{margin-top: 0}.qt-c .rcards + .callout,.qt-c .callout + .rich{margin-top: 24px}.qt-c .rich + .movers{margin-top: 12px}.qt-c .glance + .tbl,.qt-c .tbl + .rich{margin-top: 20px}.qt-c .vs + .rich,.qt-c .vs + .qt-duo,.qt-c .flags + .qt-copy,.qt-c .qt-duo + .callout{margin-top: 28px}.sec--paper + .qt-c.qt-wh-list{padding-top: var(--sec-y)}.hero + .qt-rp-alert{padding-top: clamp(24px,1rem + 2vw,48px)}.qt-rp-alert{padding-bottom: clamp(40px,2rem + 2vw,72px)}.qt-rp-alert .callout{font-size: 1rem;max-width: 880px}.qt-rp-list{margin: 6px 0 0;padding-left: 1.15em}.qt-rp-list li + li{margin-top: .4em}.hero__lead .qt-safe{color: var(--bad);font-weight: 650;text-decoration: underline;text-decoration-thickness: 1.5px;text-underline-offset: 3px}.qt-duo{display: grid;gap: 28px;align-items: start}@media (min-width: 960px){.qt-duo{grid-template-columns: minmax(0,1.1fr) minmax(0,1fr);gap: clamp(40px,5vw,72px)}}.qt-duo>*{min-width: 0}.qt-stack{display: grid;gap: 24px}.qt-stack>*{min-width: 0}.qt-h3{font-size: 1.1875rem;letter-spacing: -.02em;margin: 0 0 10px;color: var(--tx)}.qt-fine{margin: 0;font-size: .875rem;line-height: 1.5;color: var(--tx-soft);max-width: 72ch}.qt-fine a{color: var(--tx-2)}.qt-copy{color: var(--tx-2);font-size: 1.0625rem;line-height: 1.7;max-width: 68ch}.qt-copy>*{margin-block: 0}.qt-copy>* + *{margin-top: 1em}.qt-copy strong{color: var(--tx)}.qt-copy a{color: var(--tx)}.qt-copy ul{padding-left: 1.2em}.qt-copy li + li{margin-top: .4em}