:root {
  color-scheme: light;
  --bg: #fbf8f3;
  --surface: #fffaf5;
  --ink: #2b2322;
  --muted: #6d605b;
  --line: #e7d7cf;
  --accent: #b96643;
  --accent-dark: #87462b;
  --olive: #7b8468;
  --shadow: 0 24px 60px rgba(59, 37, 24, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(185, 102, 67, 0.08), transparent 28rem),
    linear-gradient(180deg, #fff9f3 0%, var(--bg) 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header,
.site-footer {
  border-bottom: 1px solid rgba(43, 35, 34, 0.08);
  background: rgba(255, 251, 246, 0.88);
  backdrop-filter: blur(18px);
}

.site-footer {
  border-top: 1px solid rgba(43, 35, 34, 0.08);
  border-bottom: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.header-shell,
.page-shell {
  width: min(1160px, calc(100vw - 2rem));
  margin: 0 auto;
}

.header-shell {
  min-height: 4.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 700;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 0.9rem;
  background: linear-gradient(135deg, #3f2d29 0%, #9b5536 100%);
  color: #fff3e8;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.1rem;
  color: var(--muted);
  font-size: 0.94rem;
}

.header-nav a:hover,
.route-list a:hover {
  color: var(--accent-dark);
}

.page-shell {
  padding: 2rem 0 3rem;
}

.hero-band {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.5rem;
  align-items: stretch;
}

.hero-copy,
.hero-media,
.panel,
.reference-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 2rem;
}

.hero-media {
  overflow: hidden;
  min-height: 20rem;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.eyebrow {
  margin: 0 0 0.9rem;
  color: var(--accent-dark);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.5rem, 4vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.lead {
  max-width: 42rem;
  margin-bottom: 1.2rem;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.65;
}

.hero-tags,
.route-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.hero-tags span,
.route-list a {
  display: inline-flex;
  align-items: center;
  min-height: 2.6rem;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(185, 102, 67, 0.18);
  background: rgba(185, 102, 67, 0.07);
  font-size: 0.92rem;
}

.lab-grid,
.reference-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.panel,
.reference-card {
  padding: 1.6rem;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.15rem;
}

.panel-head p {
  max-width: 18rem;
  color: var(--muted);
  line-height: 1.5;
}

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

.calc-form label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.calc-form input,
.calc-form select {
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 0.9rem;
  border: 1px solid #d9c5ba;
  border-radius: 0.95rem;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

button {
  border: none;
  border-radius: 0.95rem;
  padding: 0.9rem 1.15rem;
  font: inherit;
  cursor: pointer;
}

.solid-action {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff8f2;
}

.ghost-action {
  background: #f5ece5;
  color: var(--ink);
}

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

.result-card {
  min-height: 9.5rem;
  padding: 1.15rem;
  border-radius: 1.2rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(243, 235, 227, 0.96));
  border: 1px solid rgba(123, 132, 104, 0.18);
}

.result-card span,
.result-card small {
  display: block;
  color: var(--muted);
}

.result-card strong {
  display: block;
  margin: 0.9rem 0 0.35rem;
  font-size: 2rem;
  line-height: 1;
}

.note-board {
  margin-top: 1rem;
  padding: 1.2rem;
  border-radius: 1.2rem;
  background: #2b2322;
  color: #f8eee7;
}

.note-board p {
  margin-bottom: 1rem;
  color: rgba(248, 238, 231, 0.84);
  line-height: 1.6;
}

.checklist {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.7rem;
}

.reference-card table {
  width: 100%;
  border-collapse: collapse;
}

.reference-card th,
.reference-card td {
  padding: 0.95rem 0;
  border-bottom: 1px solid rgba(43, 35, 34, 0.08);
  text-align: left;
  vertical-align: top;
}

.reference-card th {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.reference-card td {
  line-height: 1.5;
}

.subpage-shell {
  display: grid;
  grid-template-columns: 17rem minmax(0, 1fr);
  gap: 1.4rem;
}

.sub-nav {
  position: sticky;
  top: 1.4rem;
  align-self: start;
  padding: 1.3rem;
  border-radius: 1.25rem;
  border: 1px solid var(--line);
  background: rgba(255, 250, 245, 0.92);
  box-shadow: var(--shadow);
}

.sub-nav h2 {
  margin-bottom: 1rem;
  font-size: 1rem;
}

.sub-nav a {
  display: block;
  padding: 0.7rem 0.85rem;
  margin-bottom: 0.55rem;
  border-radius: 0.9rem;
  color: var(--muted);
}

.sub-nav a.active,
.sub-nav a:hover {
  background: rgba(185, 102, 67, 0.09);
  color: var(--accent-dark);
}

.subpage-main {
  display: grid;
  gap: 1.25rem;
}

.sub-hero,
.content-card {
  padding: 1.7rem;
  border-radius: 1.4rem;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.sub-hero h1 {
  font-size: clamp(2rem, 3.4vw, 3.5rem);
}

.content-card p,
.content-card li {
  color: var(--muted);
  line-height: 1.7;
}

.content-card ul {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.7rem;
}

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

.mini-tool {
  display: grid;
  gap: 0.9rem;
  padding: 1.1rem;
  border-radius: 1rem;
  border: 1px solid rgba(43, 35, 34, 0.08);
  background: #fff;
}

.mini-tool label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.mini-result {
  padding: 0.85rem 1rem;
  border-radius: 0.95rem;
  background: rgba(123, 132, 104, 0.12);
}

@media (max-width: 960px) {
  .hero-band,
  .lab-grid,
  .reference-grid,
  .subpage-shell,
  .inline-grid,
  .result-strip {
    grid-template-columns: 1fr;
  }

  .header-shell,
  .site-footer {
    width: min(1160px, calc(100vw - 1.25rem));
  }

  .page-shell {
    width: min(1160px, calc(100vw - 1.25rem));
  }
}