@font-face {
  font-family: "Instrument Sans";
  src: url("option-01-groundstate/assets/fonts/instrument-sans-latin.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("option-01-groundstate/assets/fonts/ibm-plex-mono-600-latin.woff2") format("woff2");
  font-display: swap;
  font-weight: 600;
}
:root {
  --paper: #f4f2ea;
  --ink: #1d2522;
  --green: #315b45;
  --red: #ec1e27;
  --line: rgba(29,37,34,.18);
  --font-display: "Instrument Sans","Helvetica Neue",sans-serif;
  --font-signal: "IBM Plex Mono",monospace;
  --ease: cubic-bezier(.2,0,0,1);
}
*,
*::before,
*::after { box-sizing: border-box; }
html { background: var(--paper); scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-display);
}
img { display: block; max-width: 100%; }
header,
footer {
  min-height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem clamp(1rem,4vw,4.5rem);
  border-bottom: 1px solid var(--line);
  font: 600 .65rem/1.4 var(--font-signal);
  letter-spacing: .1em;
  text-transform: uppercase;
}
header img {
  width: 105px;
  height: 70px;
  object-fit: contain;
  mix-blend-mode: multiply;
}
main { padding: clamp(4rem,6vw,6.5rem) clamp(1rem,4vw,4.5rem); }
.intro {
  display: grid;
  grid-template-columns: minmax(0,1fr);
  column-gap: clamp(3rem,7vw,8rem);
  row-gap: clamp(2rem,3vw,3.5rem);
  align-items: end;
  margin-bottom: clamp(4.5rem,7vw,7rem);
}
.intro > p {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: .75rem;
  margin: 0;
  color: rgba(29,37,34,.68);
  font: 600 .68rem/1.4 var(--font-signal);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.intro > p::before {
  content: "";
  width: 2.4rem;
  height: 2px;
  flex: 0 0 auto;
  background: var(--red);
}
.intro h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(4rem,7vw,7.4rem);
  font-weight: 520;
  line-height: .88;
  letter-spacing: -.06em;
  text-transform: none;
  white-space: nowrap;
}
.intro h1 em {
  color: inherit;
  font-family: inherit;
  font-style: normal;
  font-weight: inherit;
}
.concepts { border-top: 1px solid var(--ink); }
.concept {
  display: grid;
  grid-template-columns: minmax(0,1.4fr) minmax(300px,.8fr);
  gap: clamp(2.5rem,5vw,6rem);
  padding: clamp(2.5rem,4vw,4.5rem) 0;
  border-bottom: 1px solid var(--ink);
  color: inherit;
  text-decoration: none;
}
.concept-image {
  position: relative;
  aspect-ratio: 16 / 10;
  height: auto;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}
.concept-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  filter: saturate(.94);
  transition: transform 900ms var(--ease),filter 350ms;
}
.concept-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,transparent 60%,rgba(19,37,26,.3));
  opacity: 0;
  transition: opacity 350ms;
}
.concept:hover .concept-image img,
.concept:focus-visible .concept-image img { transform: scale(1.035); filter: saturate(1.04); }
.concept:hover .concept-image::after,
.concept:focus-visible .concept-image::after { opacity: 1; }
.concept-copy { align-self: center; padding-block: 1rem; }
.concept-copy small {
  color: var(--red);
  font: 600 .65rem/1.4 var(--font-signal);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.concept-copy h2 {
  margin: 1.6rem 0;
  color: var(--ink);
  font-size: clamp(2.7rem,3.8vw,4.8rem);
  font-weight: 520;
  line-height: .88;
  letter-spacing: -.055em;
  text-transform: uppercase;
}
.concept-copy h2 em {
  color: inherit;
  font-family: inherit;
  font-style: normal;
  font-weight: inherit;
}
.concept-copy p {
  max-width: 38ch;
  margin-bottom: 0;
  color: rgba(29,37,34,.68);
  line-height: 1.65;
}
.concept-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
  padding: .9rem 1.15rem;
  color: white;
  background: var(--red);
  font: 600 .62rem/1.2 var(--font-signal);
  letter-spacing: .12em;
  text-transform: uppercase;
  transition: transform 280ms var(--ease), background-color 280ms;
}
.concept:hover .concept-action,
.concept:focus-visible .concept-action {
  transform: translateX(.35rem);
  background: #ce111a;
}
footer { border-top: 0; border-bottom: 0; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 5px; }
@media (max-width: 800px) {
  .intro { grid-template-columns: 1fr; }
  .intro > p,
  .intro h1 { grid-column: 1; }
  .concept { grid-template-columns: 1fr; }
  .concept-image { aspect-ratio: 16 / 10; }
  .concept-copy h2 { margin-block: 1.2rem; }
  .intro h1 { white-space: normal; }
}
@media (max-width: 520px) {
  header,footer { align-items: flex-start; flex-direction: column; }
  main { padding-top: 4rem; }
  .intro h1 { font-size: clamp(3.4rem,17vw,4.25rem); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { transition-duration: 1ms !important; }
}