:root {
  --bg: #e8f2fb;
  --panel: #ffffff;
  --ink: #0b2540;
  --ink-soft: #33506b;
  --line: #c9deef;
  --accent: #0b6fb8;
  --accent-dark: #084e82;
  --good: #0e7c4a;
  --bad: #b3261e;
  --mono: 'JetBrains Mono', monospace;
  --serif: 'Fraunces', serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  line-height: 1.5;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent-dark);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

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

:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 2px;
}

header.site {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.logo {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--ink);
}

.logo a {
  color: inherit;
  text-decoration: none;
}

.logo em {
  color: var(--accent-dark);
  font-style: normal;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 80px;
}

.hero-tag {
  max-width: 720px;
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--accent-dark);
  margin-bottom: 18px;
}

.hero-cta-wrap {
  margin: 0 0 28px;
}

.hero-cta {
  display: inline-block;
  background: var(--accent-dark);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  padding: 14px 24px;
  border-radius: 8px;
  border: 2px solid var(--accent-dark);
}

.hero-cta:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.hero-cta:focus-visible {
  outline: 3px solid var(--accent-dark);
  outline-offset: 3px;
}

.headline {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  font-weight: 600;
  line-height: 1.12;
  margin: 0 0 18px;
}

.headline em {
  font-style: italic;
  color: var(--accent-dark);
}

.sub {
  max-width: 640px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  margin-bottom: 28px;
}

section.hero {
  padding-top: 36px;
}

.calc-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  margin-top: 36px;
  box-shadow: 0 12px 30px -18px rgba(11, 37, 64, 0.25);
}

.calc-title {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  margin: 0 0 4px;
}

.calc-desc {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 22px;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 720px) {
  .calc-grid {
    grid-template-columns: 1fr 1fr;
  }
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

.field {
  margin-bottom: 18px;
}

label {
  display: block;
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.field-val {
  font-family: var(--mono);
  color: var(--accent-dark);
  font-weight: 700;
}

input[type='range'] {
  width: 100%;
  accent-color: var(--accent-dark);
}

input[type='number'] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.95rem;
  background: #fff;
  color: var(--ink);
}

select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 0.95rem;
  background: #fff;
  color: var(--ink);
}

.hint {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 4px;
}

.results {
  margin-top: 8px;
  border-top: 2px dashed var(--line);
  padding-top: 22px;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.result-row:last-child {
  border-bottom: none;
}

.result-label {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.result-value {
  font-weight: 700;
  font-size: 1.05rem;
}

.margin-block {
  margin-top: 18px;
  padding: 20px;
  border-radius: 12px;
  background: #f2f8fd;
  border: 1px solid var(--line);
}

.margin-block.positive {
  background: #eaf7f0;
  border-color: #bfe3cd;
}

.margin-block.negative {
  background: #fbeaea;
  border-color: #efc2c0;
}

.margin-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.margin-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.margin-value {
  font-family: var(--serif);
  font-size: 2rem;
  font-weight: 600;
}

.margin-value.positive {
  color: var(--good);
}

.margin-value.negative {
  color: var(--bad);
}

.margin-pct {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 4px;
}

.margin-pct.positive {
  color: var(--good);
}

.margin-pct.negative {
  color: var(--bad);
}

.gated {
  margin-top: 26px;
  padding: 22px;
  border-radius: 12px;
  background: var(--accent-dark);
  color: #fff;
}

.gated h3 {
  font-family: var(--serif);
  margin: 0 0 6px;
  font-size: 1.15rem;
}

.gated p {
  color: #cfe6f7;
  font-size: 0.9rem;
  margin: 0 0 16px;
}

.gated form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

@media (min-width: 560px) {
  .gated form {
    flex-direction: row;
  }
}

.gated input[type='email'],
.gated input[type='text'] {
  flex: 1;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-family: var(--mono);
}

.gated button {
  background: #fff;
  color: var(--accent-dark);
  font-weight: 700;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  cursor: pointer;
}

.gated button:hover {
  background: #eaf4fb;
}

.gated .status {
  font-size: 0.85rem;
  margin-top: 8px;
  color: #cfe6f7;
}

section.about,
section.faq {
  padding-top: 70px;
}

h2 {
  font-family: var(--serif);
  font-size: 1.8rem;
  font-weight: 600;
}

.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.faq-item h3 {
  font-size: 1.02rem;
  margin: 0 0 6px;
}

.faq-item p {
  color: var(--ink-soft);
  margin: 0;
  font-size: 0.94rem;
}

footer {
  border-top: 1px solid var(--line);
  margin-top: 80px;
  padding: 30px 20px;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

footer .wrap {
  max-width: 1100px;
  margin: 0 auto;
}

address {
  font-style: normal;
}

[aria-live] {
  scroll-margin-top: 20px;
}

section.benchmark {
  padding-top: 70px;
}

.benchmark-intro {
  max-width: 720px;
  color: var(--ink-soft);
  font-size: 0.98rem;
  margin-bottom: 24px;
}

.benchmark-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

table.benchmark {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

table.benchmark th,
table.benchmark td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

table.benchmark th {
  background: #f2f8fd;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

table.benchmark tr:last-child td {
  border-bottom: none;
}

table.benchmark td:first-child {
  font-weight: 700;
}

.benchmark-note {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-top: 14px;
  max-width: 720px;
}

.benchmark-callout {
  margin-top: 28px;
  padding: 20px 22px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  max-width: 720px;
}

.benchmark-callout p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.about-sub {
  color: var(--ink-soft);
}

section.build-log {
  padding-top: 70px;
}

.build-log-intro {
  max-width: 720px;
  color: var(--ink-soft);
  font-size: 0.98rem;
  margin-bottom: 20px;
}

.build-summary {
  margin: 28px 0;
  padding: 24px;
  border-radius: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  max-width: 900px;
}

.build-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
}

.build-stat {
  padding: 12px 14px;
  border-radius: 8px;
  background: #f2f8fd;
  border: 1px solid var(--line);
}

.build-stat-margin.negative {
  background: #fbeaea;
  border-color: #efc2c0;
}

.build-stat-label {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.build-stat-value {
  font-weight: 700;
  font-size: 1.05rem;
}

.build-stat-margin.negative .build-stat-value {
  color: var(--bad);
}

.build-log-note {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-top: 14px;
  max-width: 720px;
}

.build-load-btn {
  margin-top: 16px;
  background: var(--accent-dark);
  color: #fff;
  font-weight: 700;
  border: none;
  padding: 12px 18px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--mono);
}

.build-load-btn:hover {
  background: var(--accent);
}

.build-log-note code {
  font-size: 0.85em;
}

table.build-log-table td:last-child {
  font-weight: 700;
  white-space: nowrap;
}