:root {
  --chalk: #e9edeb;
  --chalk-deep: #dde3e0;
  --ink: #22292e;
  --ink-soft: #4b565c;
  --schist: #9aa6a3;
  --basalt: #2e5e7e;
  --olivine: #5f7a2e;
  --amethyst: #6b4f86;
  --measure: 34rem;
  --font: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--chalk);
  color: var(--ink);
  font-family: var(--font);
  font-size: 100%;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--chalk-deep);
  padding: 0.05em 0.3em;
  border-radius: 3px;
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--ink);
  color: var(--chalk);
  padding: 0.5rem 0.75rem;
  z-index: 10;
}

/* Site header */

.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem clamp(1.25rem, 5vw, 4rem);
}

.wordmark {
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9375rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
}

main {
  flex: 1;
}

/* Lithology patterns, after geological map symbols */

.litho-basalt {
  --tone: var(--basalt);
  background-color: var(--basalt);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='24'%3E%3Cpath d='M4 6l4 4M8 6l-4 4M18 16l4 4M22 16l-4 4' stroke='%23ffffff' stroke-opacity='.16' stroke-width='1.4' fill='none'/%3E%3C/svg%3E");
}

.litho-olivine {
  --tone: var(--olivine);
  background-color: var(--olivine);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='22' height='18'%3E%3Ccircle cx='4' cy='5' r='1.3' fill='%23ffffff' fill-opacity='.18'/%3E%3Ccircle cx='15' cy='13' r='1.3' fill='%23ffffff' fill-opacity='.18'/%3E%3C/svg%3E");
}

.litho-amethyst {
  --tone: var(--amethyst);
  background-color: var(--amethyst);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='16'%3E%3Cpath d='M2 5h14M22 5h16M10 12h18' stroke='%23ffffff' stroke-opacity='.16' stroke-width='1.4' fill='none'/%3E%3C/svg%3E");
}

/* Home */

.home {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.25rem, 5vw, 4rem) clamp(3rem, 6vw, 5rem);
}

.home-intro h1 {
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.045em;
  margin: 0 0 1.75rem;
}

.home-intro .lede {
  font-size: clamp(1.125rem, 1.6vw, 1.3125rem);
  line-height: 1.45;
  max-width: var(--measure);
  margin: 0 0 1.25rem;
}

.home-intro .note {
  color: var(--ink-soft);
  max-width: var(--measure);
  margin: 0;
}

.column {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--ink);
  padding-left: 1rem;
}

.stratum {
  display: block;
  color: #fff;
  text-decoration: none;
  padding: 1.5rem 1.5rem 1.375rem;
  border-bottom: 2px solid var(--chalk);
}

.stratum:hover {
  filter: brightness(1.08);
}

.stratum:hover .stratum-name {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.12em;
}

.stratum-thick {
  padding-block: 2.25rem 2rem;
}

.stratum-name {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.375rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 0.5rem;
}

.stratum-desc {
  display: block;
  max-width: 30rem;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.stratum-status {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.9375rem;
  opacity: 0.86;
}

@media (prefers-reduced-motion: no-preference) {
  .column .stratum {
    animation: settle 700ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
  }
  .column li:nth-child(2) .stratum {
    animation-delay: 140ms;
  }
  .column li:nth-child(3) .stratum {
    animation-delay: 280ms;
  }
}

@keyframes settle {
  from {
    opacity: 0;
    transform: translateY(-14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Product pages */

.product-band {
  color: #fff;
  padding: clamp(3rem, 8vw, 6rem) clamp(1.25rem, 5vw, 4rem) clamp(2.5rem, 5vw, 3.5rem);
}

.product-band h1 {
  font-size: clamp(3rem, 8vw, 6.25rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.045em;
  margin: 0 0 1.25rem;
}

.product-band p {
  font-size: clamp(1.125rem, 1.8vw, 1.375rem);
  line-height: 1.4;
  max-width: 38rem;
  margin: 0;
}

.product-body {
  display: grid;
  grid-template-columns: minmax(0, 40rem) minmax(0, 14rem);
  justify-content: space-between;
  gap: 3rem;
  padding: clamp(2.5rem, 5vw, 4rem) clamp(1.25rem, 5vw, 4rem) 4rem;
}

.product-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.75rem;
}

.product-body section:first-child h2 {
  margin-top: 0;
}

.product-body p,
.product-body li {
  max-width: var(--measure);
}

.product-body ul {
  padding-left: 1.2rem;
}

.product-body li + li {
  margin-top: 0.35rem;
}

.status {
  border-left: 6px solid var(--tone, var(--ink));
  padding: 0.25rem 0 0.25rem 1rem;
}

.matrix {
  border-collapse: collapse;
  width: 100%;
  max-width: 40rem;
  font-size: 0.9375rem;
}

.matrix th,
.matrix td {
  text-align: left;
  vertical-align: top;
  padding: 0.6rem 0.75rem 0.6rem 0;
  border-bottom: 1px solid var(--schist);
}

.matrix th {
  font-weight: 600;
}

.button {
  display: inline-block;
  background: var(--ink);
  color: var(--chalk);
  text-decoration: none;
  font-weight: 600;
  padding: 0.7rem 1.1rem;
  border-radius: 4px;
}

.button:hover {
  background: var(--tone, var(--ink));
}

.mini-column {
  font-size: 0.9375rem;
}

.mini-column h2 {
  font-size: 1rem;
  margin-top: 0;
}

.mini-column ul {
  list-style: none;
  padding: 0 0 0 0.75rem;
  border-left: 2px solid var(--ink);
  margin: 0;
}

.mini-column li + li {
  margin-top: 0;
}

.mini-column ul a {
  display: block;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.6rem 0.75rem;
  border-bottom: 2px solid var(--chalk);
}

.mini-column ul a:hover {
  text-decoration: underline;
}

.mini-column ul a[aria-current="page"] {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

.home-link {
  display: inline-block;
  margin-top: 0.75rem;
}

/* Footer */

.site-footer {
  padding: 1.5rem clamp(1.25rem, 5vw, 4rem) 2rem;
  color: var(--ink-soft);
  font-size: 0.875rem;
  border-top: 1px solid var(--schist);
}

.site-footer p {
  margin: 0;
}

/* Not found */

.not-found {
  padding: clamp(3rem, 8vw, 6rem) clamp(1.25rem, 5vw, 4rem);
}

.not-found h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  letter-spacing: -0.04em;
  margin: 0 0 1rem;
}

@media (max-width: 52rem) {
  .home {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .product-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 30rem) {
  .site-header {
    flex-direction: column;
    gap: 0.5rem;
  }
}