:root {
  color-scheme: light;
  --bg: #f5f7f6;
  --surface: #ffffff;
  --surface-2: #eef5f1;
  --ink: #17211d;
  --muted: #5c6a63;
  --line: #d8ded7;
  --brand: #0f766e;
  --brand-strong: #0b4f49;
  --accent: #b45309;
  --blue: #285a9f;
  --danger: #a33b2f;
  --shadow: 0 10px 28px rgba(30, 42, 35, 0.08);
  --radius: 8px;
  --container: 1180px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}

a {
  color: var(--brand-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--accent);
}

img,
svg {
  max-width: 100%;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: 0;
  margin: 0 0 0.65rem;
}

h1 {
  font-size: clamp(2rem, 2rem + 1vw, 3rem);
}

h2 {
  font-size: 1.35rem;
}

p {
  margin: 0 0 1rem;
}

code {
  background: #eef0ed;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.12rem 0.35rem;
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 20;
  background: var(--ink);
  color: white;
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(245, 247, 246, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  min-width: fit-content;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--brand);
  color: white;
  font-weight: 800;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.main-nav,
.site-footer nav,
.site-footer div > a.nav-link {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0.45rem 0.65rem;
  border-radius: 7px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.94rem;
}

.nav-link:hover,
.nav-link.is-active {
  background: var(--surface-2);
  color: var(--brand-strong);
}

.hero {
  padding: 56px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 28px;
  align-items: center;
}

.hero-copy {
  max-width: 680px;
}

.hero .lede,
.page-shell > .lede,
.lede {
  color: var(--muted);
  font-size: 1.12rem;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  margin-top: 1.2rem;
}

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid var(--brand);
  border-radius: 7px;
  background: var(--brand);
  color: white;
  cursor: pointer;
  font-weight: 750;
  padding: 0.65rem 0.9rem;
  text-decoration: none;
}

.button:hover {
  background: var(--brand-strong);
  color: white;
}

.button.secondary {
  background: white;
  color: var(--brand-strong);
}

.button.secondary:hover {
  background: var(--surface-2);
}

.button.disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.section-tight {
  padding: 28px 0;
}

.band {
  background: var(--surface);
  border-block: 1px solid var(--line);
  margin: 24px 0;
  padding: 42px 0;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  gap: 28px;
}

.tool-list {
  display: grid;
  gap: 0.7rem;
}

.tool-list a {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  padding: 0.85rem;
  text-decoration: none;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin: 1.4rem 0 1rem;
}

.section-heading p {
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-height: 160px;
  padding: 1rem;
}

.card h2 {
  font-size: 1.1rem;
}

.card p:not(.eyebrow) {
  color: var(--muted);
}

.page-shell {
  padding: 32px 0 48px;
}

.page-shell.narrow {
  max-width: 780px;
}

.page-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}

.sidebar {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 92px;
}

.breadcrumbs {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 0.4rem;
  color: #98a39c;
}

.answer-box,
.rate-note,
.affiliate-box,
.cta-box,
.signup-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 1rem 0;
  padding: 1rem;
}

.answer-box {
  border-left: 5px solid var(--brand);
}

.rate-note {
  border-left: 5px solid var(--blue);
}

.calculator-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.72fr);
  gap: 1rem;
  background: #f0faf7;
  border: 1px solid #bfddd5;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 1.2rem 0;
  padding: 1rem;
  overflow: hidden;
}

.calculator-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.85rem;
  min-width: 0;
}

.calculator-form label:last-child {
  grid-column: 1 / -1;
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--ink);
  font-weight: 700;
}

input,
textarea {
  width: 100%;
  border: 1px solid #bfcac2;
  border-radius: 7px;
  color: var(--ink);
  font: inherit;
  padding: 0.7rem 0.75rem;
}

input:focus,
textarea:focus,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(15, 118, 110, 0.28);
  outline-offset: 2px;
}

.input-suffix {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(4.8rem, auto);
  align-items: center;
  width: 100%;
}

.input-suffix input {
  min-width: 0;
  width: 100%;
}

.input-suffix input {
  border-radius: 7px 0 0 7px;
}

.input-suffix span {
  border: 1px solid #bfcac2;
  border-left: 0;
  border-radius: 0 7px 7px 0;
  background: var(--surface-2);
  padding: 0.7rem 0.75rem;
}

.result-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-width: 0;
  padding: 1rem;
}

.result-panel output {
  display: block;
  font-size: 2.3rem;
  font-weight: 850;
  line-height: 1;
  margin-bottom: 0.9rem;
}

.result-panel dl {
  display: grid;
  gap: 0.45rem;
  margin: 0;
}

.result-panel dl div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--line);
  padding-top: 0.45rem;
}

.result-panel dt {
  color: var(--muted);
}

.result-panel dd {
  font-weight: 750;
  margin: 0;
}

.formula,
.source-note,
.disclosure,
.assumption {
  color: var(--muted);
  font-size: 0.94rem;
}

.content-section {
  margin: 1.5rem 0;
}

.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 1rem 0;
  overflow-x: auto;
  background: var(--surface);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

caption {
  color: var(--muted);
  font-weight: 700;
  padding: 0.8rem;
  text-align: left;
}

th,
td {
  border-top: 1px solid var(--line);
  padding: 0.78rem;
  text-align: left;
  vertical-align: top;
}

thead th {
  background: var(--surface-2);
}

.wide-table {
  min-width: 900px;
}

.check-list,
.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.check-list li,
.link-list li {
  border-top: 1px solid var(--line);
  padding: 0.7rem 0 0.7rem 1.65rem;
  position: relative;
}

.check-list li::before,
.link-list li::before {
  color: var(--brand);
  content: "✓";
  font-weight: 900;
  left: 0;
  position: absolute;
}

details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin: 0.65rem 0;
  padding: 0.85rem 1rem;
}

summary {
  cursor: pointer;
  font-weight: 800;
}

.ad-slot {
  border: 1px dashed #b9c2bd;
  border-radius: var(--radius);
  color: var(--muted);
  margin: 1.4rem 0;
  min-height: 90px;
  padding: 1rem;
  text-align: center;
}

.filter-bar {
  margin: 1rem 0;
}

.filter-bar input {
  max-width: 540px;
}

.signup-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.8fr);
  gap: 1rem;
  align-items: end;
  background: var(--surface-2);
}

.signup-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.5rem;
}

.form-message {
  grid-column: 1 / -1;
  color: var(--brand-strong);
  font-weight: 700;
  margin: 0;
}

.contact-form {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.cookie-banner {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 30;
  width: min(420px, calc(100% - 32px));
  background: var(--ink);
  color: white;
  border-radius: var(--radius);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.22);
  padding: 1rem;
}

.cookie-banner p {
  margin-bottom: 0.7rem;
}

.site-footer {
  background: var(--ink);
  color: white;
  margin-top: 32px;
  padding: 36px 0;
}

.site-footer a {
  color: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.5fr) minmax(180px, 0.5fr);
  gap: 28px;
}

.footer-grid h2 {
  font-size: 1rem;
}

.footer-brand {
  color: white;
}

.footer-brand small,
.site-footer p {
  color: #d3dbd6;
}

.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

[hidden] {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 900px) {
  .header-inner,
  .main-nav {
    align-items: flex-start;
  }

  .header-inner {
    flex-direction: column;
    padding: 0.8rem 0;
  }

  .main-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero-grid,
  .page-grid,
  .split,
  .footer-grid,
  .signup-form {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 1120px) {
  .calculator-panel {
    grid-template-columns: 1fr;
  }

  .result-panel {
    max-width: none;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 22px, var(--container));
  }

  .calculator-form,
  .signup-controls {
    grid-template-columns: 1fr;
  }

  .nav-link {
    min-height: 34px;
    padding-inline: 0.5rem;
  }

  .result-panel output {
    font-size: 1.9rem;
  }
}