:root {
  --navy: #102a43;
  --deep: #071a2d;
  --sand: #f5f1ea;
  --paper: #fcfaf6;
  --gold: #c6a15b;
  --muted: #4f5d68;
  --line: #d9d5cd;
  --white: #fff;
  --max: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--sand);
  color: var(--deep);
  font-family: "DM Sans", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  font-family: "Manrope", sans-serif;
  line-height: 1.08;
  letter-spacing: 0;
}
h1 { max-width: 820px; margin-bottom: 14px; font-size: clamp(2.35rem, 4.6vw, 4.9rem); }
h2 { font-size: clamp(1.55rem, 2.5vw, 2.45rem); }
a { color: inherit; text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 74px;
  padding: 0 max(22px, calc((100vw - var(--max)) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(7, 26, 45, .1);
  background: rgba(245, 241, 234, .94);
  backdrop-filter: blur(14px);
}
.brand { width: 78px; height: 62px; overflow: hidden; position: relative; }
.brand img { position: absolute; width: 142px; height: 142px; left: -32px; top: -32px; }
.site-header nav { display: flex; align-items: center; gap: 24px; font-size: .86rem; font-weight: 700; }
.site-header nav a:hover { color: #806738; }

.page-shell {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 36px 0 70px;
}
.kicker {
  margin-bottom: 10px;
  color: #846a38;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.lead {
  max-width: 720px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 1.08rem;
}
.intro-panel {
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}
.reassurance-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.reassurance-list li {
  padding: 7px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .45);
  color: var(--muted);
  font-size: .86rem;
  font-weight: 700;
}

.input-panel,
.results-panel,
.next-step,
.supporting-info {
  margin-top: 24px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
}
.results-panel {
  scroll-margin-top: 102px;
}
.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.panel-head h2 { margin-bottom: 0; }
.panel-head > p {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
}

.required-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.advanced-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}
.field label {
  display: block;
  min-height: 44px;
  margin-bottom: 7px;
  font-weight: 800;
  line-height: 1.25;
}
.field input {
  width: 100%;
  min-height: 48px;
  padding: 11px 12px;
  border: 1px solid #aeb6bc;
  background: var(--paper);
  color: var(--deep);
  font: 600 1rem "DM Sans", sans-serif;
}
.field input[type="range"] {
  padding: 0;
  background: transparent;
  accent-color: var(--navy);
}
.field input[aria-invalid="true"] {
  border-color: #8f3027;
  box-shadow: 0 0 0 2px rgba(143, 48, 39, .1);
}
.helper {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: .86rem;
}
.target-date-readout:not(:empty) {
  color: var(--deep);
  font-weight: 800;
}
.error {
  min-height: 18px;
  margin: 5px 0 0;
  color: #8f3027;
  font-size: .84rem;
  font-weight: 800;
}
.advanced {
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.advanced summary,
.supporting-info summary {
  cursor: pointer;
  font-weight: 800;
}
.range-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
#target-percent-output {
  font-weight: 800;
  color: var(--navy);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 24px;
  padding: 14px 22px;
  border: 0;
  background: var(--navy);
  color: white;
  font: 800 .92rem "DM Sans", sans-serif;
  cursor: pointer;
}
.btn.gold {
  background: var(--gold);
  color: var(--deep);
}
.btn:hover { filter: brightness(.96); }
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 1px solid currentColor;
  font-weight: 800;
}

.empty-state h2 { margin-bottom: 12px; }
.empty-state p { max-width: 700px; color: var(--muted); }
.results {
  scroll-margin-top: 102px;
  transition: opacity .16s ease;
}
.result-conclusion {
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.result-conclusion h2 { margin-bottom: 12px; }
.result-conclusion p {
  max-width: 860px;
  margin-bottom: 0;
  color: var(--deep);
  font-size: clamp(1.15rem, 2.1vw, 1.55rem);
  font-weight: 800;
  line-height: 1.35;
}
.result-conclusion .supporting-result {
  margin-top: 12px;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 700;
}
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.context-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}
.context-grid .metric {
  padding: 14px;
  background: white;
}
.context-grid .metric strong {
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
}
.context-grid .metric small:empty { display: none; }
.metric {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.metric.primary {
  border-color: #c8aa68;
  background: #fff9ed;
}
.metric span {
  display: block;
  margin-bottom: 10px;
  color: #806738;
  font-size: .68rem;
  font-weight: 900;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.metric strong {
  display: block;
  color: var(--deep);
  font: 800 clamp(1.85rem, 3vw, 2.75rem) "Manrope", sans-serif;
  line-height: 1;
}
.metric small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: .88rem;
  font-weight: 700;
}

.status-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}
.status-row {
  display: grid;
  grid-template-columns: 185px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.status-row b {
  color: #806738;
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.status-row p {
  margin: 0;
  color: var(--muted);
}
.capacity-range {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--line);
}
.pace-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.pace-comparison div {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--paper);
}
.pace-comparison b,
.pace-comparison span,
.pace-comparison p {
  display: block;
}
.pace-comparison b {
  color: #806738;
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.pace-comparison strong {
  display: block;
  margin-top: 8px;
  font: 800 clamp(1.85rem, 3vw, 2.65rem) "Manrope", sans-serif;
  line-height: 1;
}
.pace-comparison span {
  margin-top: 5px;
  color: var(--muted);
  font-size: .9rem;
  font-weight: 700;
}
.pace-comparison p {
  margin: 12px 0 0;
  color: var(--deep);
  font-weight: 800;
}
.range-labels {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: .86rem;
  font-weight: 800;
}
.range-track {
  position: relative;
  height: 12px;
  margin: 14px 0;
  background: #e7e2d9;
}
.range-band {
  position: absolute;
  left: 30%;
  width: 10%;
  top: 0;
  bottom: 0;
  background: var(--gold);
}
.range-marker {
  position: absolute;
  top: -5px;
  left: var(--marker);
  width: 3px;
  height: 22px;
  background: var(--deep);
}
.range-text {
  margin: 0;
  color: var(--muted);
  font-size: .9rem;
}
.calculation-details {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.calculation-details dl {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 10px 18px;
  margin: 16px 0 0;
}
.calculation-details dt { font-weight: 800; }
.calculation-details dd { margin: 0; color: var(--muted); }

.next-step p { max-width: 760px; color: var(--muted); }
.next-step .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
}
.short-disclaimer {
  margin-bottom: 16px;
  color: var(--muted);
  font-weight: 700;
}
.supporting-info details + details { margin-top: 12px; }
.supporting-info details p {
  max-width: 900px;
  margin: 12px 0 0;
  color: var(--muted);
}

footer {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
  padding: 28px 0 42px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .82rem;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

@media (max-width: 920px) {
  .required-grid,
  .metric-grid,
  .context-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advanced-grid { grid-template-columns: 1fr; }
  .panel-head { display: block; }
  .panel-head > p { max-width: 680px; margin-top: 10px; }
}

@media (max-width: 640px) {
  .site-header {
    height: auto;
    min-height: 68px;
    padding: 6px 18px;
  }
  .site-header nav {
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 8px 14px;
    padding-top: 12px;
    font-size: .8rem;
  }
  .page-shell,
  footer {
    width: calc(100% - 32px);
  }
  .page-shell { padding-top: 26px; }
  .input-panel,
  .results-panel,
  .next-step,
  .supporting-info {
    padding: 20px;
  }
  .required-grid,
  .metric-grid,
  .context-grid,
  .pace-comparison,
  .status-row,
  .calculation-details dl {
    grid-template-columns: 1fr;
  }
  .field label { min-height: 0; }
  .metric.primary { order: -1; }
  .btn { width: 100%; }
  .next-step .actions { align-items: stretch; }
  .text-link { justify-content: center; }
  footer { flex-direction: column; }
}

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