:root {
  color-scheme: light;
  --bg: #f5f7f2;
  --surface: #ffffff;
  --surface-soft: #f8f5ee;
  --surface-sage: #edf4ed;
  --text: #1f2a24;
  --muted: #55665c;
  --green: #2f7655;
  --green-dark: #245c43;
  --green-deep: #173e2f;
  --rust: #b85f2d;
  --rust-dark: #8f421b;
  --gold: #c7a65a;
  --border: #cbd8ce;
  --border-strong: #91a99a;
  --error: #a72e2e;
  --error-bg: #fff2f1;
  --warning: #8a5a06;
  --warning-bg: #fff8e7;
  --note-bg: #f1f4f2;
  --shadow: 0 12px 32px rgba(31, 42, 36, 0.08);
  --radius: 16px;
  --focus: #c2682f;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

button,
input,
select { font: inherit; }

button,
summary,
select { cursor: pointer; }

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

a { color: var(--green-dark); }
a:hover { color: var(--rust-dark); }

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--green-deep);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.15;
}

h1 { margin-bottom: 0.75rem; font-size: clamp(2rem, 7vw, 3.6rem); }
h2 { margin-bottom: 0.4rem; font-size: clamp(1.45rem, 4vw, 2rem); }
h3 { margin-bottom: 0.75rem; font-size: 1.25rem; }
p { margin-top: 0; }

.calculator-shell {
  width: min(1180px, calc(100% - 24px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.hero {
  padding: clamp(24px, 6vw, 58px);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at top right, rgba(199, 166, 90, 0.16), transparent 36%),
    linear-gradient(145deg, #f9f6ed, #edf4ed);
  box-shadow: var(--shadow);
}

.eyebrow,
.step-label {
  margin-bottom: 0.35rem;
  color: var(--rust-dark);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.hero-copy { max-width: 780px; color: #35463c; font-size: clamp(1.05rem, 2.4vw, 1.25rem); }
.planning-note { max-width: 760px; margin-bottom: 0; color: var(--muted); }

.panel,
.affiliate-module,
.calculator-footer {
  margin-top: 20px;
  padding: clamp(18px, 4vw, 32px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 6px 18px rgba(31, 42, 36, 0.045);
}

.section-heading { display: grid; gap: 8px; margin-bottom: 20px; }
.section-heading > p { max-width: 620px; margin-bottom: 0; color: var(--muted); }

.import-banner,
.notice {
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid #8cab96;
  border-radius: 12px;
  background: #eaf4ed;
}

.notice-error { border-color: #d59595; background: var(--error-bg); color: #6f1d1d; }

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: middle;
}

.chip-imported { margin-right: 8px; background: #d9e9dd; color: #214b37; }
.chip-aggregate { margin-top: 4px; background: var(--warning-bg); color: #704608; }
.chip-manufacturer { background: #e9ecea; color: #43564a; }
.chip-affiliate { margin-bottom: 10px; background: #fff0d4; color: #704608; }

.toolbar {
  display: grid;
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
  padding: 16px;
  border-radius: 12px;
  background: var(--surface-sage);
}

label { display: grid; gap: 6px; color: #2d3d33; font-weight: 700; }
label > span:first-child { display: inline-block; }

input,
select {
  width: 100%;
  min-height: 46px;
  padding: 10px 11px;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  background: #fff;
  color: var(--text);
}

input:hover,
select:hover { border-color: var(--green); }

[aria-invalid="true"] { border-color: var(--error); background: #fffafa; }

.field-grid { display: grid; gap: 16px; }
.field-hint,
.field-error { min-height: 1em; color: var(--muted); font-size: 0.82rem; font-weight: 500; }
.field-error:not(:empty) { color: var(--error); }

.check-label {
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: start;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-soft);
}

.check-label input,
.acknowledgment input,
.row-check input { width: 22px; min-height: 22px; margin: 0; }

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 800;
  text-decoration: none;
}

.button-primary { border-color: var(--green-dark); background: var(--green); color: #fff; }
.button-primary:hover { background: var(--green-dark); }
.button-secondary { border-color: var(--green); background: #fff; color: var(--green-dark); }
.button-secondary:hover { background: #edf4ed; }
.button-danger { border-color: #8e2525; background: #a72e2e; color: #fff; }

.text-button {
  min-height: 44px;
  padding: 6px 2px;
  border: 0;
  background: transparent;
  color: var(--green-dark);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.help-button {
  display: inline-grid;
  width: 44px;
  height: 44px;
  min-height: 44px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: #fff;
  color: var(--green-dark);
  font-size: 0.83rem;
  font-weight: 900;
}

.mobile-field-help { display: none; }

.tooltip,
.inline-help {
  margin: 10px 0;
  padding: 12px 14px;
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  background: var(--surface-soft);
  color: #425248;
  font-size: 0.92rem;
}

.table-wrap { width: 100%; overflow-x: auto; }
.appliance-table { width: 100%; border-collapse: collapse; }
.appliance-table th { padding: 10px 8px; border-bottom: 2px solid var(--border); color: var(--muted); font-size: 0.8rem; text-align: left; }
.appliance-table td { padding: 10px 7px; border-bottom: 1px solid #e1e8e2; vertical-align: top; }
.appliance-table input,
.appliance-table select { min-width: 76px; }
.appliance-table .appliance-name { min-width: 150px; }
.appliance-table .appliance-type { min-width: 76px; }
.appliance-table .remove-appliance { width: 44px; min-height: 44px; padding: 0; border: 1px solid #d7b4ae; border-radius: 8px; background: #fff; color: #8a2e24; font-size: 1.2rem; }
.appliance-table .row-error { display: block; max-width: 130px; margin-top: 4px; color: var(--error); font-size: 0.75rem; }
.row-check { display: flex; min-height: 44px; align-items: center; justify-content: center; }
.row-check-label { display: inline-grid; width: 44px; min-height: 44px; place-items: center; cursor: pointer; }

.running-totals {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.running-totals span {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface-sage);
}

.accordion-toggle,
.result-details > summary {
  display: flex;
  width: 100%;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--green-deep);
  font-weight: 900;
}

.accordion-toggle { padding: 0; border: 0; background: transparent; text-align: left; }
.accordion-toggle span { color: var(--muted); font-size: 0.82rem; font-weight: 600; }
.advanced-content { padding-top: 24px; }
.advanced-content section + section { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.section-note { margin-bottom: 16px; color: var(--muted); }

.acknowledgment {
  grid-template-columns: 24px 1fr;
  align-items: start;
  margin-top: 16px;
  padding: 14px;
  border: 1px solid #d2a755;
  border-radius: 10px;
  background: var(--warning-bg);
}

.action-bar { display: grid; gap: 10px; margin: 20px 0 0; }
.share-note { margin: 10px 0 0; color: var(--muted); font-size: 0.84rem; }

.results-panel { border-color: #8cab96; box-shadow: var(--shadow); }
.empty-state { padding: 28px 18px; border: 1px dashed var(--border-strong); border-radius: 12px; background: #fafcf9; color: var(--muted); text-align: center; }

.primary-result {
  padding: clamp(20px, 5vw, 34px);
  border-radius: 14px;
  background: linear-gradient(135deg, var(--green-deep), var(--green));
  color: #fff;
}

.primary-result h3 { margin-bottom: 8px; color: #fff; font-family: inherit; font-size: 1rem; text-transform: uppercase; letter-spacing: 0.08em; }
.primary-number { display: block; margin-bottom: 6px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 7vw, 3.2rem); font-weight: 800; line-height: 1.05; }
.primary-result p { margin-bottom: 0; color: #eef7f1; }
.primary-result.is-stale { opacity: .55; }

.blocking-card {
  padding: 18px;
  border: 2px solid var(--error);
  border-radius: 12px;
  background: var(--error-bg);
}

.blocking-card h3 { color: #771f1f; }
.blocking-card ul { padding-left: 22px; }
.fix-link { border: 0; background: transparent; color: #7c2020; font-weight: 800; text-decoration: underline; }

.warnings-stack { display: grid; gap: 10px; margin-top: 16px; }
.warning-card { padding: 13px 14px; border: 1px solid #d8b66d; border-radius: 10px; background: var(--warning-bg); color: #624207; }
.warning-card.note { border-color: var(--border); background: var(--note-bg); color: #425248; }
.warning-card strong { margin-right: 6px; }

.result-details,
.result-subsection { margin-top: 20px; }
.result-details { padding: 14px 16px; border: 1px solid var(--border); border-radius: 12px; background: #fbfcfa; }
.result-subsection { padding-top: 20px; border-top: 1px solid var(--border); }

.math-table,
.assumptions-table { width: 100%; border-collapse: collapse; }
.math-table th,
.math-table td,
.assumptions-table th,
.assumptions-table td { padding: 10px 8px; border-bottom: 1px solid #dfe7e0; text-align: left; vertical-align: top; }
.math-table th,
.assumptions-table th { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }
.math-table td:nth-child(2),
.assumptions-table td:nth-child(2) { white-space: nowrap; font-weight: 800; }

.metric-grid { display: grid; gap: 12px; }
.metric-card { padding: 15px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-sage); }
.metric-card strong { display: block; color: var(--green-deep); font-size: 1.35rem; }

.recharge-result { margin-top: 18px; padding: 16px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-sage); }
.margin-track { height: 12px; margin: 12px 0; overflow: hidden; border-radius: 999px; background: #e4e9e5; }
.margin-fill { width: 50%; height: 100%; background: var(--green); }
.margin-fill.deficit { background: var(--rust); }
.disclosure { margin: 14px 0 0; color: var(--muted); font-size: 0.88rem; }

.affiliate-module { border: 2px solid var(--gold); background: #fffaf0; }
.affiliate-heading { display: grid; gap: 10px; }
.affiliate-heading > p { color: var(--muted); }
.affiliate-disclosure { padding: 12px; border-left: 4px solid var(--rust); background: #fff; font-size: 0.9rem; }
.affiliate-grid { display: grid; gap: 14px; }
.affiliate-card { display: grid; gap: 10px; padding: 16px; border: 1px solid #dfca98; border-radius: 12px; background: #fff; }
.affiliate-card h3 { margin-bottom: 0; }
.affiliate-card p { margin-bottom: 0; color: var(--muted); }

.calculator-footer { background: #eaf1eb; }
.calculator-footer ul { padding-left: 22px; }
.calculator-footer li + li { margin-top: 8px; }

dialog { width: min(480px, calc(100% - 24px)); padding: 24px; border: 1px solid var(--border-strong); border-radius: 14px; box-shadow: 0 24px 60px rgba(0,0,0,.25); }
dialog::backdrop { background: rgba(15, 28, 20, 0.6); }
.dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }

.toast { position: fixed; right: 16px; bottom: 16px; z-index: 20; max-width: min(420px, calc(100% - 32px)); padding: 13px 16px; border-radius: 10px; background: var(--green-deep); color: #fff; box-shadow: var(--shadow); }

.imported-field { box-shadow: 0 0 0 2px #8cab96; }
.print-only { display: none; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
[hidden] { display: none !important; }

@media (min-width: 640px) {
  .calculator-shell { width: min(1180px, calc(100% - 40px)); padding-top: 36px; }
  .toolbar { grid-template-columns: minmax(220px, 1fr) auto auto; }
  .field-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .action-bar { grid-template-columns: auto auto auto 1fr; align-items: center; }
  .action-bar .text-button { justify-self: end; }
  .metric-grid,
  .affiliate-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section-heading,
  .affiliate-heading { grid-template-columns: minmax(260px, .8fr) minmax(300px, 1.2fr); align-items: end; }
}

@media (min-width: 960px) {
  .field-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .affiliate-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
  .mobile-field-help { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--muted); font-size: .85rem; font-weight: 800; }
  .mobile-field-help .help-button:last-child { width: auto; padding: 0 10px; border-radius: 999px; }
  #appliances-section > .table-wrap { overflow: visible; }
  .appliance-table,
  .appliance-table tbody,
  .appliance-table tr,
  .appliance-table td { display: block; width: 100%; }
  .appliance-table thead { display: none; }
  .appliance-table tr { margin-bottom: 14px; padding: 12px; border: 1px solid var(--border); border-radius: 12px; background: #fbfcfa; }
  .appliance-table td { display: grid; grid-template-columns: minmax(92px, 36%) minmax(0, 1fr); gap: 10px; align-items: center; padding: 7px 0; border: 0; }
  .appliance-table td::before { content: attr(data-label); color: var(--muted); font-size: 0.8rem; font-weight: 800; }
  .appliance-table td:last-child { display: flex; justify-content: flex-end; }
  .appliance-table td:last-child::before { display: none; }
  .appliance-table .appliance-name { min-width: 0; }
  .appliance-table .row-error { max-width: none; }
  .math-table,
  .math-table tbody,
  .math-table tr,
  .math-table td,
  .assumptions-table,
  .assumptions-table tbody,
  .assumptions-table tr,
  .assumptions-table td { display: block; width: 100%; }
  .math-table thead,
  .assumptions-table thead { display: none; }
  .math-table tr,
  .assumptions-table tr { margin-bottom: 10px; padding: 10px; border: 1px solid var(--border); border-radius: 9px; background: #fff; }
  .math-table td,
  .assumptions-table td { display: grid; grid-template-columns: minmax(80px, 36%) minmax(0, 1fr); gap: 8px; padding: 5px 0; border: 0; white-space: normal !important; }
  .math-table td::before,
  .assumptions-table td::before { color: var(--muted); font-size: .76rem; font-weight: 800; text-transform: uppercase; }
  .math-table td:nth-child(1)::before { content: "Stage"; }
  .math-table td:nth-child(2)::before { content: "Value"; }
  .math-table td:nth-child(3)::before { content: "Why"; }
  .assumptions-table td:nth-child(1)::before { content: "Assumption"; }
  .assumptions-table td:nth-child(2)::before { content: "Value"; }
  .assumptions-table td:nth-child(3)::before { content: "Basis"; }
  .assumptions-table td:nth-child(4)::before { content: "Status"; }
}

@media (max-width: 420px) {
  .calculator-shell { width: min(100% - 16px, 1180px); padding-top: 8px; }
  .hero,
  .panel,
  .affiliate-module,
  .calculator-footer { padding: 16px; border-radius: 12px; }
  .appliance-table td { grid-template-columns: 1fr; }
  .appliance-table td::before { margin-bottom: -4px; }
  .accordion-toggle { align-items: flex-start; flex-direction: column; }
  .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

@media print {
  @page { margin: 0.55in; }
  html { scroll-behavior: auto; }
  body { background: #fff; color: #000; font-size: 10pt; line-height: 1.35; }
  .calculator-shell { width: 100%; padding: 0; }
  .hero { padding: 0 0 7pt; border: 0; box-shadow: none; background: none; }
  .hero .eyebrow { margin-bottom: 2pt; font-size: 7.5pt; }
  .hero h1 { margin-bottom: 3pt; font-size: 21pt; }
  .hero-copy { max-width: none; margin-bottom: 3pt; font-size: 10pt; line-height: 1.3; }
  .planning-note { max-width: none; font-size: 8.5pt; line-height: 1.3; }
  #calculator-form,
  #import-banner,
  #recharge-panel,
  #affiliate-module,
  .help-button,
  .toast { display: none !important; }
  .panel,
  .calculator-footer { margin-top: 8pt; padding: 9pt; border: 1px solid #999; box-shadow: none; }
  .results-panel { padding: 0; border: 0; box-shadow: none; break-inside: auto; page-break-inside: auto; }
  .section-heading { display: block; margin-bottom: 5pt; }
  .section-heading .step-label { margin-bottom: 1pt; font-size: 7.5pt; }
  .section-heading h2 { margin-bottom: 0; font-size: 16pt; }
  .primary-result { background: #fff; color: #000; border: 2px solid #333; }
  .primary-result { padding: 8pt 10pt; border-radius: 7pt; break-inside: avoid; page-break-inside: avoid; }
  .primary-result h3,
  .primary-result p { color: #000; }
  .primary-result h3 { margin-bottom: 2pt; font-size: 8.5pt; }
  .primary-number { margin-bottom: 2pt; font-size: 22pt; }
  .primary-result p { margin-bottom: 1pt; }
  h2,
  h3,
  .result-details > summary { break-after: avoid-page; page-break-after: avoid; }
  p,
  li { orphans: 3; widows: 3; }
  .warnings-stack { gap: 5pt; margin-top: 7pt; }
  .warning-card { padding: 6pt 7pt; border-radius: 5pt; break-inside: avoid; page-break-inside: avoid; }
  .result-details { display: block !important; }
  .result-details:not([open]) > *:not(summary) { display: block !important; }
  .result-details,
  .result-subsection { margin-top: 8pt; }
  .result-details { padding: 6pt 8pt; border-radius: 6pt; break-inside: auto; page-break-inside: auto; }
  .result-details > summary { min-height: 0; margin-bottom: 3pt; }
  .result-subsection { padding-top: 7pt; }
  #power-result { break-inside: avoid; page-break-inside: avoid; }
  .result-subsection > h3,
  .print-only > h3 { margin-bottom: 4pt; font-size: 12pt; }
  .table-wrap { overflow: visible; }
  .math-table,
  .assumptions-table { display: table !important; width: 100% !important; table-layout: fixed; border-collapse: collapse; font-size: 8.5pt; line-height: 1.25; }
  .math-table thead,
  .assumptions-table thead { display: table-header-group !important; }
  .math-table tbody,
  .assumptions-table tbody { display: table-row-group !important; width: auto !important; }
  .math-table tr,
  .assumptions-table tr { display: table-row !important; width: auto !important; margin: 0; padding: 0; border: 0; background: transparent; break-inside: avoid; page-break-inside: avoid; }
  .math-table th,
  .math-table td,
  .assumptions-table th,
  .assumptions-table td { display: table-cell !important; width: auto !important; padding: 3pt 4pt; border-bottom: 0.5pt solid #bbb; vertical-align: top; }
  .math-table td,
  .assumptions-table td { white-space: normal !important; }
  .math-table td::before,
  .assumptions-table td::before { display: none !important; content: none !important; }
  .math-table th:nth-child(1) { width: 25%; }
  .math-table th:nth-child(2) { width: 18%; }
  .math-table th:nth-child(3) { width: 57%; }
  .assumptions-table th:nth-child(1) { width: 30%; }
  .assumptions-table th:nth-child(2) { width: 16%; }
  .assumptions-table th:nth-child(3) { width: 39%; }
  .assumptions-table th:nth-child(4) { width: 15%; }
  .metric-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5pt; }
  .metric-card { padding: 6pt; border-radius: 5pt; break-inside: avoid; page-break-inside: avoid; }
  .metric-card strong { font-size: 12pt; }
  .metric-card small { line-height: 1.25; }
  .disclosure { margin-top: 5pt; font-size: 8.5pt; }
  .print-only { display: block !important; margin-top: 8pt; padding-top: 7pt; border-top: 1px solid var(--border); break-inside: auto; page-break-inside: auto; }
  .print-only ul,
  .calculator-footer ul { margin: 0; padding-left: 16pt; }
  .print-only li + li,
  .calculator-footer li + li { margin-top: 2pt; }
  .calculator-footer { background: #fff; break-inside: auto; page-break-inside: auto; }
  .calculator-footer h2 { margin-bottom: 4pt; font-size: 14pt; }
  .calculator-footer li { break-inside: avoid; page-break-inside: avoid; }
  .calculator-footer p { margin: 5pt 0 0; font-size: 8.5pt; }
  a { color: #000; text-decoration: none; }
}