:root {
  color-scheme: light;
  --ink: #172126;
  --muted: #52616a;
  --paper: #f6f3ec;
  --surface: #ffffff;
  --line: #d8d2c5;
  --green: #1f5d50;
  --green-dark: #153f36;
  --gold: #8a5d12;
  --error: #a12622;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

a {
  color: var(--green);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid #d6a33c;
  outline-offset: 3px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem max(1.25rem, calc((100vw - 1120px) / 2));
  background: var(--green-dark);
  color: #fff;
}

.site-header a {
  color: #fff;
  text-decoration: none;
}

.brand {
  font-weight: 750;
  letter-spacing: 0.02em;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

nav a:hover {
  text-decoration: underline;
}

main,
footer {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.hero {
  padding: clamp(3rem, 8vw, 6rem) 0 2.5rem;
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 920px;
  margin-bottom: 1rem;
  font-size: clamp(2.25rem, 6vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: 0.6rem;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.025em;
}

.lede {
  max-width: 800px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.notice {
  max-width: 840px;
  padding: 1rem 1.2rem;
  border-left: 5px solid var(--gold);
  background: #fff8e7;
}

.panel {
  margin-bottom: 1.5rem;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: 0 12px 30px rgb(45 51 47 / 0.06);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 1.5rem;
}

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

.calculator-grid,
.record-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.4rem;
  color: #34444c;
  font-weight: 700;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  border: 1px solid #aeb9b4;
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
}

input {
  min-height: 48px;
  padding: 0.7rem 0.8rem;
}

textarea {
  padding: 0.8rem;
  resize: vertical;
}

.input-with-unit {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  border: 1px solid #aeb9b4;
  border-radius: 10px;
  overflow: hidden;
}

.input-with-unit input {
  border: 0;
  border-radius: 0;
}

.input-with-unit span {
  padding: 0 0.9rem;
  color: var(--muted);
  font-weight: 600;
}

button {
  min-height: 48px;
  padding: 0.75rem 1.2rem;
  border: 0;
  border-radius: 10px;
  background: var(--green);
  color: #fff;
  cursor: pointer;
  font-weight: 800;
}

button:hover {
  background: var(--green-dark);
}

.secondary {
  border: 1px solid var(--green);
  background: transparent;
  color: var(--green);
}

.secondary:hover {
  background: #edf6f2;
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.result-grid > div {
  padding: 1rem;
  border-radius: 12px;
  background: #edf6f2;
}

.result-label {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.result-grid strong {
  font-size: clamp(1.25rem, 3vw, 1.8rem);
}

.error {
  margin-top: 1rem;
  color: var(--error);
  font-weight: 700;
}

.full-width {
  grid-column: 1 / -1;
}

.checklist {
  display: grid;
  gap: 0.7rem;
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 12px;
  background: #f3f7f5;
}

.checklist h3 {
  margin-bottom: 0.2rem;
}

.checklist label {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-weight: 600;
}

.checklist input {
  width: 1.2rem;
  min-height: 1.2rem;
  margin-top: 0.2rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.guide ol {
  max-width: 820px;
  padding-left: 1.5rem;
}

.guide li + li {
  margin-top: 0.6rem;
}

.resources {
  padding: 2.5rem 0 4rem;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.resource-grid a {
  display: grid;
  gap: 0.4rem;
  padding: 1.3rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  text-decoration: none;
}

.resource-grid a:hover {
  border-color: var(--green);
  transform: translateY(-2px);
}

.resource-grid strong {
  color: var(--green);
  font-size: 1.05rem;
}

.resource-grid span,
footer {
  color: var(--muted);
}

footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
}

footer p {
  margin-bottom: 0.5rem;
}

@media (max-width: 720px) {
  .site-header,
  .calculator-grid,
  .record-grid,
  .result-grid,
  .resource-grid {
    grid-template-columns: 1fr;
  }

  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    font-size: 0.9rem;
  }

  .calculator-grid button,
  .full-width {
    grid-column: auto;
  }
}

@media print {
  .site-header,
  .hero,
  #calculator,
  .guide,
  .resources,
  footer,
  .actions {
    display: none !important;
  }

  body,
  .panel {
    background: #fff;
  }

  main {
    width: 100%;
  }

  #test-record {
    display: block;
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
  }

  input,
  textarea {
    border-color: #666;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}