:root {
  --ink: #17211e;
  --forest: #1c3b32;
  --forest-2: #285346;
  --orange: #f59e0b;
  --sky: #dceaf2;
  --paper: #f7f8f5;
  --white: #ffffff;
  --muted: #60706a;
  --line: #d7ddd9;
  --danger: #a93b2e;
  --radius: 6px;
  --shadow: 0 12px 30px rgba(23, 33, 30, .09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
a { color: inherit; }
button, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; color: var(--forest); background: var(--white); border: 2px solid var(--forest); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid #c76f00; outline-offset: 3px; }

.site-header { height: 68px; padding: 0 clamp(20px, 4vw, 64px); display: flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--white); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; text-decoration: none; font-size: 1.05rem; }
.brand-mark { width: 42px; height: 30px; display: block; flex: 0 0 auto; object-fit: contain; }
nav { display: flex; gap: clamp(16px, 3vw, 34px); }
nav a, .footer-links a { text-decoration: none; font-size: .92rem; color: #3f514a; }
nav a:hover, nav a:focus-visible, .footer-links a:hover { color: var(--forest); text-decoration: underline; text-underline-offset: 5px; }

.masthead { min-height: 330px; position: relative; display: grid; align-items: end; overflow: hidden; background: var(--forest); }
.masthead img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 58%; }
.masthead-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,31,27,.82), rgba(13,31,27,.28) 62%, rgba(13,31,27,.08)); }
.masthead-copy { position: relative; z-index: 1; max-width: 760px; padding: 48px clamp(20px, 6vw, 92px) 52px; color: var(--white); }
.eyebrow { margin: 0 0 8px; color: #f7bd4c; font-weight: 800; text-transform: uppercase; font-size: .78rem; letter-spacing: 0; }
.eyebrow.dark { color: #9a5e00; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 12px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.35rem, 5vw, 4.7rem); line-height: .98; max-width: 690px; letter-spacing: 0; }
.masthead-copy > p:last-child { max-width: 590px; margin: 0; font-size: 1.05rem; color: #eff6f2; }
.freshness { position: absolute; right: clamp(20px, 4vw, 64px); bottom: 22px; z-index: 2; color: var(--white); font-size: .78rem; padding: 7px 10px; border: 1px solid rgba(255,255,255,.48); border-radius: 4px; background: rgba(20,35,31,.46); }

.topic-band { padding: 48px clamp(20px, 4vw, 64px); background: var(--white); border-bottom: 1px solid var(--line); }
.topic-layout { display: grid; grid-template-columns: minmax(250px, .8fr) 2fr; gap: 52px; align-items: start; }
.topic-intro > p:last-child { max-width: 440px; margin: 12px 0 0; color: var(--muted); }
.topic-list { display: grid; grid-template-columns: repeat(3, 1fr); border-left: 1px solid var(--line); }
.topic-item { min-width: 0; padding: 4px 26px 2px; border-right: 1px solid var(--line); }
.topic-item span { color: #9a5e00; font-family: Georgia, serif; }
.topic-item h3 { margin: 8px 0 7px; font-size: 1rem; }
.topic-item p { margin: 0; color: var(--muted); font-size: .86rem; }
.topic-link { display: inline-block; margin-top: 12px; color: var(--forest-2); font-size: .82rem; font-weight: 800; text-underline-offset: 4px; }

.compare-shell { padding: 54px clamp(20px, 4vw, 64px) 70px; max-width: 1500px; margin: 0 auto; }
.section-heading { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 24px; }
h2 { margin-bottom: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(1.75rem, 3vw, 2.65rem); line-height: 1.08; }
.section-note { max-width: 480px; margin: 0; color: var(--muted); font-size: .92rem; }
.filter-bar { display: grid; grid-template-columns: minmax(380px, 1fr) 210px 210px; gap: 14px; padding: 16px; background: var(--white); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: var(--radius); }
.segmented { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; padding: 4px; background: #edf1ee; border-radius: 5px; }
.segment { min-height: 40px; border: 0; color: #405149; background: transparent; border-radius: 4px; cursor: pointer; }
.segment.active { color: var(--white); background: var(--forest); box-shadow: 0 2px 8px rgba(28,59,50,.2); }
.select-wrap { display: grid; gap: 4px; font-size: .74rem; font-weight: 800; color: var(--muted); text-transform: uppercase; }
select { min-height: 40px; border: 1px solid var(--line); border-radius: 4px; padding: 0 32px 0 10px; color: var(--ink); background: var(--white); text-transform: none; }
.result-line { min-height: 48px; display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: .9rem; }
.text-button { border: 0; background: none; color: var(--forest-2); font-weight: 750; cursor: pointer; text-decoration: underline; text-underline-offset: 4px; }

.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.product-card { min-width: 0; display: flex; flex-direction: column; background: var(--white); border: 1px solid var(--line); border-top: 4px solid var(--forest); border-radius: var(--radius); overflow: hidden; }
.product-card:hover { border-color: #aab8b1; box-shadow: var(--shadow); }
.product-top { padding: 18px 18px 14px; border-bottom: 1px solid var(--line); }
.product-label-line { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.product-brand { color: var(--muted); font-size: .75rem; font-weight: 800; text-transform: uppercase; }
.research-status { padding: 3px 6px; color: #5e4600; background: #fff0bd; border: 1px solid #e4c870; font-size: .64rem; font-weight: 800; text-transform: uppercase; }
.product-card h3 { margin: 4px 0 12px; font-size: 1.04rem; line-height: 1.25; }
.price { display: flex; align-items: baseline; gap: 7px; }
.price strong { font-size: 1.5rem; }
.price small { color: var(--muted); font-size: .72rem; }
.spec-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; padding: 16px 18px; margin: 0; }
.spec-list div { min-width: 0; }
.spec-list dt { color: var(--muted); font-size: .7rem; font-weight: 800; text-transform: uppercase; }
.spec-list dd { margin: 2px 0 0; font-weight: 750; }
.fit { padding: 0 18px 16px; color: #3d4d46; font-size: .87rem; min-height: 58px; }
.card-actions { margin-top: auto; display: grid; grid-template-columns: 1fr 44px; border-top: 1px solid var(--line); }
.compare-toggle, .source-link { min-height: 44px; display: grid; place-items: center; border: 0; background: #f4f7f5; cursor: pointer; color: var(--forest); font-weight: 800; text-decoration: none; }
.compare-toggle { border-right: 1px solid var(--line); }
.compare-toggle.selected { background: var(--forest); color: var(--white); }
.source-link:hover, .compare-toggle:hover { background: var(--sky); color: var(--forest); }
.compare-toggle.selected:hover { background: var(--forest-2); color: var(--white); }
.empty-state { grid-column: 1 / -1; padding: 52px; border: 1px dashed #9aa9a2; text-align: center; color: var(--muted); }

.comparison-panel { position: sticky; bottom: 0; z-index: 20; border-top: 1px solid #b4c1bb; background: rgba(255,255,255,.97); box-shadow: 0 -12px 34px rgba(23,33,30,.13); }
.comparison-inner { padding: 18px clamp(20px, 4vw, 64px) 22px; max-width: 1500px; margin: 0 auto; }
.comparison-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.comparison-title h2 { font-size: 1.35rem; }
.comparison-title .eyebrow { margin-bottom: 2px; }
.icon-button { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 50%; background: var(--white); font-size: 1.5rem; cursor: pointer; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 660px; }
th, td { padding: 9px 12px; border: 1px solid var(--line); text-align: left; font-size: .82rem; }
th { background: var(--forest); color: var(--white); }
td:first-child { font-weight: 800; background: #eef3f0; }

.constrained { max-width: 1220px; margin-left: auto; margin-right: auto; }
.guide-band { padding: 68px clamp(20px, 4vw, 64px); background: var(--sky); }
.guide-list { border-top: 1px solid #9fb6c2; }
.guide-row { min-height: 112px; display: grid; grid-template-columns: 56px 1fr 34px; align-items: center; gap: 18px; border-bottom: 1px solid #9fb6c2; text-decoration: none; }
.guide-row:hover strong { color: #8b5200; }
.guide-number { font-family: Georgia, serif; font-size: 1.2rem; color: #566f7a; }
.guide-row strong { display: block; font-family: Georgia, serif; font-size: clamp(1.18rem, 2vw, 1.6rem); }
.guide-row small { display: block; margin-top: 5px; color: #52676f; font-size: .9rem; }
.arrow { font-size: 1.6rem; }
.featured-guide { background: rgba(255,255,255,.34); }
.featured-guide .guide-number { color: #8b5200; }

.method-band { padding: 74px clamp(20px, 4vw, 64px); color: var(--white); background: var(--forest); }
.method-layout { display: grid; grid-template-columns: .7fr 2fr; gap: 64px; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.method-grid span { color: var(--orange); font-family: Georgia, serif; font-size: 1.25rem; }
.method-grid h3 { margin: 12px 0 8px; font-size: 1.05rem; }
.method-grid p { margin: 0; color: #cfe0d9; font-size: .9rem; }
.method-link { grid-column: 2; width: fit-content; margin-top: 28px; color: var(--white); font-weight: 800; text-underline-offset: 5px; }

.feedback-band { padding: 56px clamp(20px, 4vw, 64px); background: var(--white); border-top: 1px solid var(--line); }
.feedback-layout { display: grid; grid-template-columns: minmax(280px, 1fr) minmax(420px, 1.15fr); gap: 56px; align-items: center; }
.feedback-layout p:last-child { max-width: 620px; margin: 12px 0 0; color: var(--muted); }
.feedback-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.feedback-actions a { min-height: 48px; display: grid; place-items: center; padding: 8px 12px; border: 1px solid #9eada6; color: var(--forest); background: var(--white); text-align: center; text-decoration: none; font-size: .86rem; font-weight: 800; }
.feedback-actions a:hover, .feedback-actions a:focus-visible { color: var(--white); background: var(--forest); border-color: var(--forest); }

footer { padding: 42px clamp(20px, 4vw, 64px) 24px; display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: start; background: #111816; color: #e6efeb; }
.footer-brand { color: var(--white); }
footer p { margin: 10px 0 0; color: #aebbb5; font-size: .85rem; }
.footer-links { max-width: 620px; display: flex; justify-content: flex-end; gap: 12px 22px; flex-wrap: wrap; }
.footer-links a { color: #d8e4df; }
.contact-link { display: inline-block; margin-top: 8px; color: #d8e4df; font-size: .85rem; text-underline-offset: 4px; }
.copyright { grid-column: 1 / -1; padding-top: 18px; border-top: 1px solid #33413c; }

.article-shell { min-height: calc(100vh - 68px); padding: 54px clamp(20px, 6vw, 100px) 80px; }
.article { max-width: 850px; margin: 0 auto; }
.article h1 { color: var(--forest); font-size: clamp(2.25rem, 5vw, 4.2rem); }
.article-lede { font-size: 1.2rem; color: #42544c; }
.article-meta { padding-bottom: 20px; margin-bottom: 32px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .85rem; }
.article h2 { margin-top: 42px; font-size: 1.8rem; }
.article h3 { margin-top: 28px; }
.article p, .article li { font-size: 1rem; }
.article table { margin: 24px 0; }
.callout { margin: 28px 0; padding: 20px; border-left: 4px solid var(--orange); background: #fff4dc; }
.formula { padding: 18px; border: 1px solid var(--line); background: var(--white); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.legal-list { padding-left: 1.2rem; }
.legal-note { margin-top: 30px; padding: 18px 20px; border: 1px solid var(--line); background: var(--white); color: #42544c; }
.feedback-template { margin: 24px 0; padding: 20px; border: 1px solid var(--line); background: var(--white); }
.feedback-template dt { margin-top: 14px; font-weight: 800; }
.feedback-template dt:first-child { margin-top: 0; }
.feedback-template dd { margin: 3px 0 0; color: var(--muted); }
.primary-link { min-height: 44px; width: fit-content; display: inline-flex; align-items: center; padding: 0 16px; color: var(--white); background: var(--forest); text-decoration: none; font-weight: 800; }
.primary-link:hover, .primary-link:focus-visible { background: var(--forest-2); }

.system-shell { min-height: calc(100vh - 68px); }
.system-intro { padding: 56px clamp(20px, 6vw, 96px) 46px; color: var(--white); background: var(--forest); }
.system-intro > div { max-width: 1220px; margin: 0 auto; }
.system-intro h1 { max-width: 820px; }
.system-intro .article-lede { max-width: 760px; margin-bottom: 0; color: #dce9e4; }
.system-workspace { padding: 54px clamp(20px, 4vw, 64px) 70px; }
.system-heading { max-width: 1220px; margin: 0 auto 24px; display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.system-heading p:last-child { max-width: 520px; margin: 0; color: var(--muted); }
.system-tool { max-width: 1220px; margin: 0 auto; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); }
.flow-map { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.flow-stage { position: relative; min-width: 0; padding: 22px; border-right: 1px solid var(--line); }
.flow-stage:last-child { border-right: 0; }
.flow-stage:not(:last-child)::after { content: "→"; position: absolute; right: -13px; top: 30px; z-index: 2; width: 26px; height: 26px; display: grid; place-items: center; color: var(--forest); background: var(--white); font-weight: 900; }
.flow-stage > span { color: #9a5e00; font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.flow-stage h2 { margin: 5px 0 18px; font-family: inherit; font-size: 1rem; }
.map-node { width: 100%; min-height: 50px; margin-top: 8px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: #f5f7f5; text-align: left; cursor: pointer; }
.map-node:hover, .map-node:focus-visible { border-color: var(--forest-2); background: var(--sky); }
.map-node[aria-pressed="true"] { border-color: var(--forest); color: var(--white); background: var(--forest); }
.map-node strong, .map-node small { display: block; }
.map-node strong { font-size: .88rem; }
.map-node small { margin-top: 2px; color: var(--muted); font-size: .7rem; }
.map-node[aria-pressed="true"] small { color: #d9e7e1; }
.map-detail { display: grid; grid-template-columns: .9fr 2fr; gap: 40px; padding: 30px; border-top: 1px solid var(--line); background: #eef3f0; }
.map-detail h2 { font-size: 1.7rem; }
.detail-copy > p { color: #42534c; }
.detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 22px 0 0; }
.detail-grid div { padding-top: 12px; border-top: 2px solid #aebdb6; }
.detail-grid dt { color: var(--muted); font-size: .7rem; font-weight: 800; text-transform: uppercase; }
.detail-grid dd { margin: 6px 0 0; font-size: .88rem; }
.system-principles { padding: 62px clamp(20px, 4vw, 64px); background: var(--sky); }
.principle-grid { max-width: 1220px; margin: 28px auto 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #9fb6c2; }
.principle-grid div { padding: 22px 24px 0 0; }
.principle-grid h3 { margin-bottom: 7px; font-size: 1rem; }
.principle-grid p { margin: 0; color: #4d626b; font-size: .9rem; }

.scenario-intro { padding: 64px clamp(20px, 6vw, 96px) 54px; color: var(--white); background: var(--forest); }
.scenario-intro h1 { max-width: 970px; }
.scenario-intro .article-lede { max-width: 790px; margin-bottom: 26px; color: #dce9e4; }
.scenario-meta { display: flex; gap: 10px 24px; flex-wrap: wrap; color: #c5d8d0; font-size: .8rem; }
.scenario-meta span { padding-top: 8px; border-top: 1px solid #6d8c80; }

.assumption-band { padding: 56px clamp(20px, 4vw, 64px); background: var(--white); border-bottom: 1px solid var(--line); }
.compact-heading { align-items: center; }
.assumption-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.assumption-grid div { padding: 20px 24px 4px 0; }
.assumption-grid span, .stage-grid span { color: #9a5e00; font-family: Georgia, serif; }
.assumption-grid h3 { margin: 8px 0 6px; font-size: .98rem; }
.assumption-grid p { margin: 0; color: var(--muted); font-size: .86rem; }

.energy-path { padding: 62px clamp(20px, 4vw, 64px); background: var(--paper); }
.path-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 26px; border: 1px solid var(--line); background: var(--white); }
.path-strip div { position: relative; min-width: 0; padding: 20px; border-right: 1px solid var(--line); }
.path-strip div:last-child { border-right: 0; }
.path-strip div:not(:last-child)::after { content: "→"; position: absolute; top: 18px; right: -13px; z-index: 2; width: 26px; height: 26px; display: grid; place-items: center; color: var(--forest); background: var(--white); font-weight: 900; }
.path-strip span, .path-strip strong, .path-strip small { display: block; }
.path-strip span { color: #8b5200; font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.path-strip strong { margin: 8px 0 5px; font-size: .94rem; }
.path-strip small { color: var(--muted); font-size: .78rem; }
.energy-path .callout { margin-bottom: 0; }

.planner-section { padding: 66px clamp(20px, 4vw, 64px); background: var(--sky); }
.planner-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.planner-heading > p { max-width: 540px; margin: 0; color: #405760; }
.planner-tool { display: grid; grid-template-columns: minmax(0, 1.72fr) minmax(310px, .72fr); align-items: start; gap: 18px; }
.planner-inputs { min-width: 0; border: 1px solid #9fb6c2; background: var(--white); box-shadow: var(--shadow); }
.planner-group { min-width: 0; margin: 0; padding: 24px; border: 0; border-bottom: 1px solid var(--line); background: var(--white); }
.planner-group:last-child { border-bottom: 0; }
.group-heading { display: flex; align-items: start; justify-content: space-between; gap: 24px; margin-bottom: 18px; }
.group-heading > div { display: flex; align-items: baseline; gap: 12px; }
.group-heading h3 { margin: 0; font-size: 1.08rem; }
.group-heading p { max-width: 400px; margin: 0; color: var(--muted); font-size: .82rem; }
.group-number { color: #9a5e00; font-family: Georgia, serif; font-size: .86rem; }
.trip-presets { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-bottom: 18px; padding: 4px; background: #edf1ee; }
.preset-button { min-height: 40px; border: 0; color: #405149; background: transparent; cursor: pointer; font-weight: 750; }
.preset-button:hover, .preset-button:focus-visible { background: var(--sky); }
.preset-button.active { color: var(--white); background: var(--forest); }
.control-grid { display: grid; gap: 12px; }
.control-grid.three-up { grid-template-columns: repeat(3, 1fr); }
.control-grid.two-up { grid-template-columns: repeat(2, 1fr); }
.control-grid label, .custom-device-row label { min-width: 0; display: grid; gap: 5px; color: #405149; font-size: .75rem; font-weight: 750; }
.input-with-unit { min-width: 0; min-height: 39px; display: grid; grid-template-columns: minmax(50px, 1fr) auto; align-items: center; border: 1px solid var(--line); background: var(--white); }
.input-with-unit input { width: 100%; min-width: 0; height: 37px; padding: 0 8px; border: 0; color: var(--ink); background: transparent; font: inherit; text-align: right; }
.input-with-unit span { padding-right: 9px; color: var(--muted); font-size: .7rem; white-space: nowrap; }
.device-table { border-top: 1px solid var(--line); }
.device-row { min-height: 64px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, .65fr); align-items: center; gap: 18px; padding: 11px 0; border-bottom: 1px solid var(--line); }
.device-choice { min-width: 0; display: grid; grid-template-columns: 20px 1fr; align-items: center; gap: 10px; cursor: pointer; }
.device-choice input, .library-rows input[type="checkbox"] { width: 17px; height: 17px; margin: 0; accent-color: var(--forest); }
.device-choice strong, .device-choice small { display: block; }
.device-choice strong { font-size: .88rem; }
.device-choice small { margin-top: 2px; color: var(--muted); font-size: .73rem; }
.compact-control { min-width: 0; display: grid; gap: 4px; color: var(--muted); font-size: .68rem; font-weight: 800; text-transform: uppercase; }
.compact-control select, .compact-control input { width: 100%; min-height: 38px; padding: 0 9px; border: 1px solid var(--line); color: var(--ink); background: var(--white); font: inherit; text-transform: none; }
.device-estimate { justify-self: end; color: #41554d; font-size: .78rem; font-weight: 750; }
.device-library { border-top: 1px solid var(--line); }
.device-library details { border-bottom: 1px solid var(--line); }
.device-library summary, .advanced-group > summary { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; }
.device-library summary::-webkit-details-marker, .advanced-group > summary::-webkit-details-marker { display: none; }
.device-library summary::after, .advanced-group > summary::after { content: "+"; flex: 0 0 30px; width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--line); font-size: 1.2rem; }
.device-library details[open] summary::after, .advanced-group[open] > summary::after { content: "−"; }
.device-library summary > span:first-child { min-width: 0; }
.device-library summary strong, .device-library summary small { display: block; }
.device-library summary strong { font-size: .88rem; }
.device-library summary small { color: var(--muted); font-size: .73rem; }
.summary-count { margin-left: auto; color: #596d65; font-size: .72rem; white-space: nowrap; }
.library-rows { padding: 0 0 12px 30px; }
.medical-warning { margin: 0 0 10px 30px; padding: 10px 12px; border-left: 3px solid var(--danger); color: #603027; background: #fff2ef; font-size: .74rem; }
.library-rows label { min-height: 47px; display: grid; grid-template-columns: 18px minmax(150px, 1fr) minmax(180px, .8fr) 54px; align-items: center; gap: 10px; border-top: 1px solid #edf0ee; cursor: pointer; }
.library-rows label > span { font-size: .8rem; font-weight: 750; }
.library-rows label > small { color: var(--muted); font-size: .72rem; }
.device-quantity { width: 50px; min-height: 32px; border: 1px solid var(--line); text-align: center; }
.device-quantity:disabled { color: #87938e; background: #f0f2f0; }
.custom-device-list { border-top: 1px solid var(--line); }
.custom-device-row { display: grid; grid-template-columns: minmax(160px, 1fr) minmax(120px, .72fr) minmax(120px, .72fr) 38px; align-items: end; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.custom-name { width: 100%; min-height: 39px; padding: 0 9px; border: 1px solid var(--line); color: var(--ink); font: inherit; }
.remove-device { width: 38px; height: 39px; border: 1px solid var(--line); color: var(--danger); background: var(--white); cursor: pointer; font-size: 1.2rem; }
.remove-device:hover, .remove-device:focus-visible { color: var(--white); background: var(--danger); }
.add-device-button { margin-top: 12px; min-height: 38px; padding: 0 12px; border: 1px solid #9caea6; color: var(--forest); background: var(--white); cursor: pointer; font-weight: 800; }
.add-device-button:hover, .add-device-button:focus-visible { background: var(--sky); }
.advanced-line { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.advanced-group { padding-top: 0; padding-bottom: 0; }
.advanced-group > summary { min-height: 68px; }
.advanced-group > summary > span { display: flex; align-items: baseline; gap: 12px; }
.advanced-group > summary small { margin-left: auto; color: var(--muted); font-size: .73rem; }
.advanced-content { padding: 4px 0 24px; }
.advanced-note { margin: 14px 0 0; color: var(--muted); font-size: .76rem; }
.planner-results { position: sticky; top: 86px; padding: 26px; color: var(--white); background: var(--forest); border-radius: var(--radius); box-shadow: var(--shadow); }
.planner-results h2 { margin-bottom: 8px; font-size: 2rem; }
.planner-results > p:not(.eyebrow) { color: #cfe0d9; }
.energy-range { margin: 22px 0 14px; padding: 15px 0; border-top: 1px solid #55796c; border-bottom: 1px solid #55796c; }
.energy-range span, .energy-range strong, .energy-range small { display: block; }
.energy-range span { color: #bcd2c9; font-size: .68rem; font-weight: 800; text-transform: uppercase; }
.energy-range strong { margin: 3px 0; font-family: Georgia, serif; font-size: 1.65rem; }
.energy-range small { color: #cfe0d9; font-size: .73rem; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 0 0 18px; background: #4e7165; }
.result-grid div { min-width: 0; padding: 13px; background: #24483d; }
.result-grid dt { color: #bcd2c9; font-size: .67rem; font-weight: 800; text-transform: uppercase; }
.result-grid dd { margin: 4px 0 0; font-size: .9rem; font-weight: 850; overflow-wrap: anywhere; }
.result-fit { margin-bottom: 16px; padding: 13px; color: var(--forest); background: #f6bd4b; }
.result-fit strong, .result-fit span { display: block; }
.result-fit span { margin-top: 2px; font-size: .76rem; }
.result-note { padding: 14px 0; border-top: 1px solid #55796c; color: #dce9e4; font-size: .8rem; }
.reset-planner { width: 100%; min-height: 42px; border: 1px solid #90aa9f; color: var(--white); background: transparent; cursor: pointer; font-weight: 800; }
.reset-planner:hover, .reset-planner:focus-visible { color: var(--forest); background: var(--white); }
.planner-disclaimer { margin-top: 16px; padding: 14px 18px; border: 1px solid #9fb6c2; color: #405760; background: rgba(255,255,255,.55); font-size: .78rem; }

.fridge-model { padding: 68px clamp(20px, 4vw, 64px); background: var(--white); }
.stage-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 28px; border-top: 1px solid var(--line); }
.stage-grid article { padding: 22px 26px 8px 0; }
.stage-grid h3 { margin: 7px 0; font-size: 1rem; }
.stage-grid p { margin: 0; color: var(--muted); font-size: .86rem; }
.fridge-model .formula { max-width: 900px; margin: 34px 0 0; }

.decision-band { padding: 68px clamp(20px, 4vw, 64px); background: #f0e7d7; }
.decision-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 64px; }
.decision-layout > div:first-child p { max-width: 690px; color: #4e554f; }
.decision-checks { padding-left: 30px; border-left: 1px solid #b9aa91; }
.decision-checks h3 { margin-bottom: 14px; }
.decision-checks ol { margin: 0; padding-left: 1.2rem; }
.decision-checks li { padding: 7px 0; }

.evidence-band { padding: 64px clamp(20px, 4vw, 64px); background: var(--paper); }
.evidence-layout { display: grid; grid-template-columns: .8fr 1.5fr; gap: 60px; }
.evidence-list { border-top: 1px solid var(--line); }
.evidence-list p { display: grid; grid-template-columns: 180px 1fr; gap: 22px; margin: 0; padding: 15px 0; border-bottom: 1px solid var(--line); }
.evidence-list span { color: var(--muted); }

@media (max-width: 1100px) {
  .topic-layout { grid-template-columns: 1fr; gap: 28px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-bar { grid-template-columns: 1fr 1fr; }
  .segmented { grid-column: 1 / -1; }
  .method-layout { grid-template-columns: 1fr; gap: 34px; }
  .method-link { grid-column: auto; }
  .flow-map { grid-template-columns: repeat(2, 1fr); }
  .flow-stage { border-bottom: 1px solid var(--line); }
  .flow-stage:nth-child(2) { border-right: 0; }
  .flow-stage:nth-child(2)::after { display: none; }
  .map-detail { grid-template-columns: 1fr; gap: 18px; }
  .assumption-grid, .stage-grid { grid-template-columns: repeat(2, 1fr); }
  .planner-tool { grid-template-columns: 1fr; }
  .planner-results { position: static; }
}

@media (max-width: 700px) {
  .site-header { height: auto; min-height: 64px; align-items: flex-start; padding-top: 14px; padding-bottom: 12px; }
  .site-header nav { gap: 14px; flex-wrap: wrap; justify-content: flex-end; }
  nav a { font-size: .82rem; }
  .masthead { min-height: 420px; }
  .masthead-shade { background: linear-gradient(0deg, rgba(13,31,27,.88), rgba(13,31,27,.12) 80%); }
  .masthead-copy { padding-bottom: 62px; }
  .freshness { right: 20px; bottom: 18px; }
  .topic-band { padding-top: 40px; padding-bottom: 42px; }
  .topic-list { grid-template-columns: 1fr; border-left: 0; border-top: 1px solid var(--line); }
  .topic-item { padding: 20px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .section-heading { display: block; }
  .section-note { margin-top: 12px; }
  .filter-bar { grid-template-columns: 1fr; }
  .segmented { grid-column: auto; grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: 1fr; }
  .comparison-panel { position: static; }
  .comparison-inner { padding-top: 26px; padding-bottom: 32px; }
  .article table { min-width: 0; table-layout: fixed; }
  .article th, .article td { padding: 8px 7px; overflow-wrap: anywhere; font-size: .76rem; }
  .system-intro { padding-top: 46px; padding-bottom: 42px; }
  .system-heading { display: block; }
  .system-heading p:last-child { margin-top: 12px; }
  .flow-map { grid-template-columns: 1fr; }
  .flow-stage { border-right: 0; }
  .flow-stage:not(:last-child)::after { content: "↓"; right: 22px; top: auto; bottom: -13px; }
  .flow-stage:nth-child(2)::after { display: grid; }
  .map-detail { padding: 24px 20px; }
  .detail-grid { grid-template-columns: 1fr; }
  .principle-grid { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .feedback-layout { grid-template-columns: 1fr; gap: 24px; }
  .guide-row { grid-template-columns: 38px 1fr 24px; min-height: 130px; }
  footer { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .copyright { grid-column: auto; }
  .scenario-intro { padding-top: 46px; padding-bottom: 44px; }
  .assumption-grid, .stage-grid, .decision-layout, .evidence-layout { grid-template-columns: 1fr; }
  .path-strip { grid-template-columns: 1fr; }
  .path-strip div { border-right: 0; border-bottom: 1px solid var(--line); }
  .path-strip div:last-child { border-bottom: 0; }
  .path-strip div:not(:last-child)::after { content: "↓"; top: auto; right: 18px; bottom: -13px; }
  .planner-heading { display: block; }
  .planner-heading > p { margin-top: 12px; }
  .planner-group { padding: 20px 16px; }
  .group-heading { display: block; }
  .group-heading > div { margin-bottom: 6px; }
  .trip-presets { grid-template-columns: repeat(2, 1fr); }
  .control-grid.three-up, .control-grid.two-up { grid-template-columns: 1fr; }
  .device-row { grid-template-columns: 1fr; gap: 8px; padding: 14px 0; }
  .device-estimate { justify-self: start; padding-left: 30px; }
  .compact-control { padding-left: 30px; }
  .device-library summary { align-items: flex-start; padding: 14px 0; }
  .summary-count { display: none; }
  .library-rows { padding-left: 0; }
  .medical-warning { margin-left: 0; }
  .library-rows label { grid-template-columns: 18px 1fr 50px; gap: 9px; padding: 9px 0; }
  .library-rows label > small { grid-column: 2 / -1; grid-row: 2; }
  .device-quantity { grid-column: 3; grid-row: 1; }
  .custom-device-row { grid-template-columns: 1fr 1fr 38px; }
  .custom-device-row label:first-child { grid-column: 1 / -1; }
  .advanced-group > summary { align-items: flex-start; padding: 14px 0; }
  .advanced-group > summary > span { align-items: flex-start; }
  .advanced-group > summary small { display: none; }
  .input-with-unit { width: 100%; }
  .result-grid { grid-template-columns: 1fr; }
  .feedback-actions { grid-template-columns: 1fr; }
  .decision-checks { padding: 26px 0 0; border-left: 0; border-top: 1px solid #b9aa91; }
  .evidence-list p { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}