:root {
  --ink: #102b2c;
  --ink-2: #183b3c;
  --ink-3: #265354;
  --paper: #f5f0e5;
  --paper-2: #fffdf7;
  --paper-3: #ebe4d6;
  --text: #142423;
  --muted: #63706b;
  --line: #d4cdbf;
  --power: #f4b51d;
  --power-dark: #6f4400;
  --power-soft: #fff1b9;
  --warning: #fff0d3;
  --warning-text: #5e3e00;
  --white: #ffffff;
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--power); outline-offset: 3px; }
[hidden] { display: none !important; }
.container { width: min(var(--max), calc(100% - 36px)); margin-inline: auto; }

.site-header {
  border-bottom: 1px solid rgba(255,255,255,.16);
  position: sticky;
  top: 0;
  z-index: 30;
}
.site-header-dark { background: rgba(16,43,44,.96); backdrop-filter: blur(12px); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; color: var(--white); }
.brand-mark {
  width: 34px;
  height: 34px;
  display: block;
  border-radius: 8px;
  background:
    linear-gradient(var(--power), var(--power)) 5px 21px / 6px 8px no-repeat,
    linear-gradient(var(--power), var(--power)) 14px 13px / 6px 16px no-repeat,
    linear-gradient(var(--power), var(--power)) 23px 5px / 6px 24px no-repeat;
  border-bottom: 2px solid rgba(255,255,255,.42);
}
.brand-copy { font-weight: 850; letter-spacing: -.025em; line-height: 1; }
.brand-copy small { display: block; font-size: .66rem; font-weight: 650; letter-spacing: .13em; text-transform: uppercase; margin-top: 4px; opacity: .7; }
.header-nav { display: flex; align-items: center; gap: 26px; }
.header-nav a { color: rgba(255,255,255,.78); text-decoration: none; font-size: .92rem; font-weight: 650; }
.header-nav a:hover { color: var(--white); }

.hero { overflow: hidden; }
.hero-dark {
  color: var(--white);
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
    var(--ink);
  background-size: 48px 48px;
  padding: 88px 0 104px;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); gap: 70px; align-items: center; }
.eyebrow, .section-kicker {
  margin: 0 0 12px;
  color: var(--power);
  font-size: .76rem;
  line-height: 1;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(3rem, 7vw, 6.8rem);
  line-height: .92;
  letter-spacing: -.065em;
  font-weight: 900;
}
.hero-copy > p { max-width: 700px; margin: 28px 0 0; color: rgba(255,255,255,.76); font-size: clamp(1.08rem, 2vw, 1.35rem); }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.hero-note { font-size: .88rem; color: rgba(255,255,255,.6); }
.button { border: 0; border-radius: 999px; min-height: 48px; padding: 0 21px; display: inline-flex; align-items: center; justify-content: center; text-decoration: none; font-weight: 800; transition: transform .14s ease, background .14s ease, color .14s ease; }
.button:hover { transform: translateY(-1px); }
.button.power { background: var(--power); color: #2d2207; }
.button.power:hover { background: #ffc943; }
.button.power:disabled { opacity: .38; cursor: not-allowed; transform: none; }
.button.quiet { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.button.light { background: var(--paper-2); color: var(--ink); }
.button.text-button { min-height: auto; padding: 0; border-radius: 0; color: var(--ink); background: transparent; text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }

.hero-guide { border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius-lg); background: rgba(255,255,255,.065); padding: 26px; }
.guide-label { margin-bottom: 8px; color: rgba(255,255,255,.58); text-transform: uppercase; font-weight: 800; letter-spacing: .12em; font-size: .72rem; }
.hero-guide ol { list-style: none; padding: 0; margin: 0; }
.hero-guide li { display: grid; grid-template-columns: 44px 1fr; gap: 0 12px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.13); }
.hero-guide li:last-child { border-bottom: 0; padding-bottom: 0; }
.hero-guide li > span { grid-row: 1 / 3; color: var(--power); font-size: .78rem; font-weight: 900; letter-spacing: .08em; }
.hero-guide strong { font-size: 1.02rem; }
.hero-guide small { color: rgba(255,255,255,.6); margin-top: 3px; }

.calculator-section { padding: 82px 0 88px; }
.section-intro { display: grid; grid-template-columns: 74px minmax(0, 720px); gap: 22px; align-items: start; margin-bottom: 26px; }
.section-number { color: var(--power-dark); font-weight: 900; letter-spacing: .08em; padding-top: 5px; }
.section-intro h2, .results-head h2, .how-heading h2, .product-heading h2, .hawaii-band h2, .landing-hero h1 { margin: 0; letter-spacing: -.045em; line-height: 1; }
.section-intro h2, .results-head h2, .how-heading h2, .product-heading h2, .hawaii-band h2 { font-size: clamp(2rem, 5vw, 4.1rem); }
.section-intro p:not(.section-kicker) { margin: 12px 0 0; color: var(--muted); font-size: 1.02rem; }
.duration-intro { margin-top: 64px; }
.calculator-panel { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 22px 0 26px; }
.compact-panel { padding: 24px 0; }

.appliance-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.appliance-card { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: border-color .14s ease, background .14s ease; }
.appliance-card:hover { border-color: #a69c8a; }
.appliance-card.selected { background: var(--power-soft); border-color: #c99614; }
.appliance-select { width: 100%; display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: center; border: 0; background: transparent; color: var(--text); padding: 17px 18px; text-align: left; }
.appliance-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.appliance-select strong { display: block; font-size: 1.02rem; letter-spacing: -.015em; }
.appliance-select small { display: block; color: var(--muted); margin-top: 4px; font-size: .82rem; }
.appliance-type { font-size: .66rem; text-transform: uppercase; letter-spacing: .12em; color: var(--power-dark); font-weight: 850; }
.check { width: 28px; height: 28px; border: 1px solid var(--line); border-radius: 7px; display: grid; place-items: center; color: transparent; background: var(--white); font-weight: 900; }
.selected .check { color: var(--ink); background: var(--power); border-color: var(--power-dark); }
.appliance-controls { padding: 13px 18px 17px; border-top: 1px solid rgba(20,36,35,.12); }
.appliance-controls label { display: inline-flex; align-items: center; gap: 7px; margin: 0 16px 7px 0; font-size: .8rem; color: var(--muted); }
.appliance-controls input { width: 82px; border: 1px solid var(--line); border-radius: 8px; padding: 7px 8px; background: var(--paper-2); color: var(--text); }
.assumption-toggle { display: block; border: 0; background: transparent; color: var(--ink-3); padding: 6px 0 0; font-size: .8rem; text-decoration: underline; text-underline-offset: 3px; }
.assumption-copy { margin: 8px 0 0; color: var(--muted); font-size: .8rem; max-width: 580px; }
.medical-card { border-style: dashed; }
.custom-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 18px; }
.custom-chip { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: var(--paper-2); border-radius: 999px; padding: 7px 10px; font-size: .82rem; }
.custom-chip button { border: 0; background: transparent; font-size: 1rem; line-height: 1; }
.custom-form { margin-top: 20px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); }
.form-grid { display: grid; grid-template-columns: 1.7fr repeat(4, 1fr); gap: 14px; }
.form-grid label, .custom-duration-wrap { color: var(--muted); font-size: .78rem; font-weight: 700; }
.form-grid input, .form-grid select, .custom-duration-wrap input { width: 100%; margin-top: 7px; border: 1px solid var(--line); border-radius: 8px; background: var(--white); padding: 11px 12px; color: var(--text); }
.error { color: #922c20; font-size: .84rem; }

.duration-options { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.duration-btn { min-height: 58px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper-2); color: var(--text); font-weight: 800; }
.duration-btn:hover { border-color: #9c917d; }
.duration-btn.active { background: var(--ink); border-color: var(--ink); color: var(--white); }
.custom-duration-wrap { display: block; max-width: 180px; margin-top: 14px; }
.power-plan { margin: 24px 0 0; padding: 18px 0 0; border: 0; border-top: 1px solid var(--line); }
.power-plan legend { padding: 0; margin: 0 0 9px; font-size: .8rem; font-weight: 850; color: var(--text); }
.power-plan label { display: block; margin: 7px 0; color: var(--text); font-size: .88rem; }
.power-plan input { margin-right: 8px; accent-color: var(--ink); }
.power-plan small { display: block; margin-top: 9px; color: var(--muted); font-size: .78rem; }
.calculate-bar { margin-top: 34px; padding: 20px 22px; background: var(--ink); color: var(--white); border-radius: var(--radius); display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.bar-label { display: block; color: rgba(255,255,255,.55); text-transform: uppercase; font-size: .68rem; letter-spacing: .12em; font-weight: 800; margin-bottom: 4px; }
.selection-count { display: block; font-size: 1rem; }
.calculate-button { min-width: 245px; }

.results-section { background: var(--ink); color: var(--white); padding: 84px 0 92px; }
.results-head { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 28px; }
.results-head > p { max-width: 340px; margin: 0; color: rgba(255,255,255,.6); }
.result-layout { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: 14px; }
.result-primary { min-height: 320px; background: var(--power); color: #271e09; border-radius: var(--radius-lg); padding: 28px; display: flex; flex-direction: column; justify-content: flex-end; }
.result-primary > span { font-size: .76rem; text-transform: uppercase; letter-spacing: .11em; font-weight: 900; }
.result-primary > strong { display: block; font-size: clamp(4rem, 9vw, 8.2rem); line-height: .85; letter-spacing: -.07em; margin: 22px 0 16px; }
.result-primary > small { font-size: 1.02rem; font-weight: 750; }
.result-secondary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.metric { min-height: 153px; border: 1px solid rgba(255,255,255,.17); border-radius: var(--radius); padding: 20px; display: flex; flex-direction: column; justify-content: space-between; }
.metric span { color: rgba(255,255,255,.58); font-size: .8rem; }
.metric strong { font-size: clamp(1.8rem, 4vw, 3rem); letter-spacing: -.045em; }
.result-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.explanation, .breakdown-card { border: 1px solid rgba(255,255,255,.17); border-radius: var(--radius); padding: 24px; }
.explanation h3, .breakdown-card h3 { margin: 0 0 12px; font-size: 1.15rem; }
.explanation p { margin: 0; color: rgba(255,255,255,.68); }
.load-breakdown { list-style: none; padding: 0; margin: 0; }
.load-breakdown li { display: flex; justify-content: space-between; gap: 18px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: .88rem; }
.load-breakdown li:first-child { padding-top: 0; }
.load-breakdown li:last-child { border-bottom: 0; padding-bottom: 0; }
.load-breakdown li span:last-child { color: rgba(255,255,255,.58); text-align: right; }
.warning { margin-top: 14px; background: var(--warning); color: var(--warning-text); border-radius: var(--radius); padding: 18px 20px; }

.product-section { margin-top: 72px; }
.product-heading { display: flex; justify-content: space-between; gap: 32px; align-items: end; margin-bottom: 24px; }
.product-heading > p { max-width: 430px; margin: 0; color: rgba(255,255,255,.62); }
.product-results { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.product-card, .product-empty { background: var(--paper-2); color: var(--text); border-radius: var(--radius); padding: 22px; }
.product-label { color: var(--power-dark); font-size: .68rem; text-transform: uppercase; letter-spacing: .11em; font-weight: 900; }
.product-card h3 { margin: 9px 0 10px; font-size: 1.3rem; letter-spacing: -.025em; }
.product-card p { margin: 0 0 16px; }
.product-card .muted { color: var(--muted); font-size: .78rem; }
.product-card .button.quiet { width: 100%; }
.product-empty { grid-column: 1 / -1; }
.product-empty p { color: var(--muted); }
.affiliate-note { margin: 16px 0 0; color: rgba(255,255,255,.55); font-size: .78rem; max-width: 900px; }

.how-section { padding: 88px 0; background: var(--paper-2); }
.how-heading { max-width: 760px; margin-bottom: 30px; }
.how-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.how-grid article { padding: 24px 24px 28px 0; margin-right: 24px; border-right: 1px solid var(--line); }
.how-grid article:last-child { border-right: 0; margin-right: 0; }
.how-grid span { color: var(--power-dark); font-size: .72rem; font-weight: 900; letter-spacing: .1em; }
.how-grid h3 { margin: 28px 0 8px; font-size: 1.3rem; letter-spacing: -.025em; }
.how-grid p { margin: 0; color: var(--muted); }
.method-strip { margin-top: 46px; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 28px; padding: 26px 0 0; }
.method-strip h3 { font-size: 1.35rem; margin: 0 0 6px; }
.method-strip p { margin: 0; max-width: 760px; color: var(--muted); }
.method-strip a { font-weight: 800; text-decoration-thickness: 1px; text-underline-offset: 4px; }

.hawaii-band { background: var(--power); color: #271e09; padding: 56px 0; }
.hawaii-band-inner { display: flex; justify-content: space-between; gap: 40px; align-items: center; }
.hawaii-band .section-kicker { color: var(--power-dark); }
.hawaii-band h2 { max-width: 760px; }
.hawaii-band p:not(.section-kicker) { margin: 14px 0 0; max-width: 760px; }

.site-footer { background: #0a2021; color: rgba(255,255,255,.68); padding: 48px 0 56px; }
.footer-inner { display: grid; grid-template-columns: 1fr 1.6fr .7fr; gap: 38px; align-items: start; }
.brand-footer { color: var(--white); }
.footer-brand p, .footer-copy { margin: 14px 0 0; font-size: .82rem; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { color: rgba(255,255,255,.78); font-size: .84rem; }

/* Supporting landing pages */
.landing-hero { background: var(--ink); color: var(--white); padding: 86px 0 80px; }
.landing-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 70px; align-items: end; }
.landing-hero h1 { font-size: clamp(3rem, 7vw, 6.2rem); max-width: 950px; }
.landing-hero .lead { max-width: 780px; font-size: 1.18rem; color: rgba(255,255,255,.72); margin: 24px 0 0; }
.landing-note { border-top: 1px solid rgba(255,255,255,.2); padding-top: 18px; color: rgba(255,255,255,.65); font-size: .9rem; }
.landing-actions { margin-top: 30px; }
.info-section { padding: 78px 0; }
.info-section.alt { background: var(--paper-2); }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.info-block h2 { margin: 0 0 18px; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1; letter-spacing: -.04em; }
.info-block p, .info-block li { color: var(--muted); }
.info-block ol, .info-block ul { padding-left: 1.2rem; }
.source-list { display: grid; gap: 10px; }
.source-list a { color: var(--ink-3); font-weight: 700; }
.callout-line { border-left: 5px solid var(--power); padding: 4px 0 4px 20px; margin-top: 26px; }
.callout-line p { margin: 0; }

@media (max-width: 1080px) {
  .form-grid { grid-template-columns: 1.5fr 1fr 1fr; }
}

@media (max-width: 920px) {
  .hero-grid, .landing-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-dark { padding: 70px 0 78px; }
  .hero-guide { max-width: 620px; }
  .duration-options { grid-template-columns: repeat(4, 1fr); }
  .result-layout { grid-template-columns: 1fr; }
  .result-primary { min-height: 260px; }
  .product-results { grid-template-columns: 1fr; }
  .how-grid { grid-template-columns: 1fr 1fr; }
  .how-grid article:nth-child(2) { border-right: 0; margin-right: 0; }
  .how-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .container { width: min(100% - 24px, var(--max)); }
  .header-inner { min-height: 64px; }
  .header-nav a:not(:first-child) { display: none; }
  .hero h1 { font-size: clamp(3rem, 14vw, 5rem); }
  .hero-copy > p { font-size: 1.05rem; }
  .calculator-section, .results-section, .how-section { padding: 64px 0; }
  .section-intro { grid-template-columns: 46px 1fr; gap: 10px; }
  .section-intro h2, .results-head h2, .how-heading h2, .product-heading h2, .hawaii-band h2 { font-size: clamp(2rem, 9vw, 3.2rem); }
  .appliance-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .duration-options { grid-template-columns: repeat(2, 1fr); }
  .calculate-bar { align-items: stretch; flex-direction: column; }
  .calculate-button { width: 100%; }
  .results-head, .product-heading, .hawaii-band-inner { align-items: flex-start; flex-direction: column; }
  .result-secondary-grid, .result-detail-grid { grid-template-columns: 1fr; }
  .result-primary > strong { font-size: clamp(4rem, 20vw, 6.5rem); }
  .how-grid { grid-template-columns: 1fr; }
  .how-grid article, .how-grid article:nth-child(2) { border-right: 0; margin-right: 0; border-bottom: 1px solid var(--line); }
  .how-grid article:last-child { border-bottom: 0; }
  .method-strip { grid-template-columns: 1fr; align-items: start; }
  .footer-inner, .info-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-links { grid-column: auto; }
  .landing-hero { padding: 66px 0 62px; }
}

@media (max-width: 470px) {
  .brand-copy { font-size: .9rem; }
  .brand-mark { width: 31px; height: 31px; }
  .header-nav a { font-size: .82rem; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-actions .button { width: 100%; }
  .hero-note { text-align: center; }
  .form-grid { grid-template-columns: 1fr; }
  .result-primary { min-height: 230px; padding: 22px; }
  .metric { min-height: 126px; }
  .load-breakdown li { flex-direction: column; gap: 3px; }
  .load-breakdown li span:last-child { text-align: left; }
}

.assumptions-panel { margin-top: 34px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 18px 0; }
.assumptions-panel summary { cursor: pointer; font-weight: 850; color: var(--text); }
.assumptions-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 28px; margin-top: 18px; }
.assumptions-grid p, .assumptions-note { margin: 0; color: var(--muted); font-size: .88rem; }
.assumptions-note { margin-top: 14px; max-width: 900px; }
@media (max-width: 720px) { .assumptions-grid { grid-template-columns: 1fr; } }

.form-help { margin: 12px 0 0; color: var(--muted); font-size: .8rem; max-width: 820px; }