:root {
  color-scheme: light;
  --sky: #e8edf0;
  --ground: #c7b99d;
  --ground-dark: #8b7f68;
  --text: #1d211d;
  --muted: #59645e;
  --moss: #4d6c55;
  --copper: #9b5535;
  --stone-a: #7b7f78;
  --stone-b: #555a54;
  --stone-c: #a4a49b;
  --shadow: rgb(37 32 24 / 24%);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --sky: #171b1c;
    --ground: #5f584a;
    --ground-dark: #373327;
    --text: #eef0ec;
    --muted: #b5bab1;
    --moss: #83a17e;
    --copper: #d08a58;
    --stone-a: #8d9189;
    --stone-b: #5b605a;
    --stone-c: #c1c0b6;
    --shadow: rgb(0 0 0 / 42%);
  }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    linear-gradient(180deg, transparent 0 68%, rgb(61 69 59 / 10%) 68% 100%),
    linear-gradient(160deg, var(--sky), #f8f5ed 54%, var(--ground));
}

body,
button {
  font: inherit;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 5;
  padding: 0.7rem 0.85rem;
  background: var(--text);
  color: var(--sky);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.rock-app {
  display: grid;
  grid-template-rows: auto minmax(24rem, 1fr) auto;
  width: min(1120px, calc(100% - 2rem));
  min-height: calc(100vh - 4.5rem);
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 1rem;
}

.brand {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.brand p {
  margin: 0.25rem 0 0;
  color: var(--copper);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(2.6rem, 9vw, 8rem);
  line-height: 0.86;
  letter-spacing: 0;
  text-align: right;
}

.rock-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 24rem;
  isolation: isolate;
}

.ground-line {
  position: absolute;
  bottom: 19%;
  left: 4%;
  width: 92%;
  height: clamp(1.2rem, 3vw, 2.4rem);
  border-radius: 50%;
  background: radial-gradient(ellipse, var(--ground-dark), transparent 68%);
  filter: blur(8px);
  opacity: 0.58;
  z-index: -1;
}

.rock-aura {
  display: grid;
  place-items: center;
  width: min(74vw, 34rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgb(255 255 255 / 52%) 0 28%, transparent 61%),
    conic-gradient(from 80deg, transparent, rgb(77 108 85 / 22%), transparent 38%);
  transition: transform 220ms ease, filter 220ms ease;
}

.rock-aura[data-mood="steady"] {
  filter: saturate(1.08);
}

.rock-aura[data-mood="absolute"] {
  transform: scale(1.02);
  filter: saturate(1.18) contrast(1.03);
}

.rock {
  position: relative;
  width: min(62vw, 26rem);
  aspect-ratio: 1.12;
  border: 0;
  border-radius: 45% 51% 39% 43% / 37% 42% 52% 48%;
  background:
    radial-gradient(circle at 34% 31%, rgb(255 255 255 / 24%), transparent 0.55rem),
    radial-gradient(circle at 64% 62%, rgb(0 0 0 / 15%), transparent 0.7rem),
    radial-gradient(circle at 42% 58%, var(--moss), transparent 1rem),
    linear-gradient(142deg, var(--stone-c), var(--stone-a) 36%, var(--stone-b) 78%);
  box-shadow:
    inset 1.1rem 1rem 1.4rem rgb(255 255 255 / 18%),
    inset -2rem -2.3rem 2.5rem rgb(0 0 0 / 22%),
    0 2.2rem 3.2rem var(--shadow);
  cursor: pointer;
  outline-offset: 1rem;
  transform: rotate(-2deg);
  transition: transform 140ms ease, box-shadow 140ms ease;
}

.rock::before,
.rock::after,
.rock-face {
  position: absolute;
  content: "";
  border-radius: 999px;
  pointer-events: none;
}

.rock::before {
  inset: 16% 24% auto 18%;
  height: 0.45rem;
  background: rgb(255 255 255 / 22%);
  transform: rotate(-13deg);
}

.rock::after {
  right: 17%;
  bottom: 18%;
  width: 34%;
  height: 0.55rem;
  background: rgb(0 0 0 / 18%);
  transform: rotate(-19deg);
}

.rock-face {
  left: 27%;
  top: 45%;
  width: 48%;
  height: 30%;
  background:
    radial-gradient(circle at 24% 28%, rgb(34 34 30 / 72%) 0 0.32rem, transparent 0.35rem),
    radial-gradient(circle at 73% 28%, rgb(34 34 30 / 72%) 0 0.32rem, transparent 0.35rem),
    radial-gradient(ellipse at 50% 70%, rgb(34 34 30 / 56%) 0 0.32rem, transparent 0.36rem);
  opacity: 0.38;
}

.rock:hover,
.rock:focus-visible {
  transform: rotate(-2deg) translateY(-0.2rem);
}

.rock:active {
  transform: rotate(-2deg) translateY(0.15rem) scale(0.99);
}

.rock[data-mood="steady"] {
  box-shadow:
    inset 1.1rem 1rem 1.4rem rgb(255 255 255 / 20%),
    inset -2rem -2.3rem 2.5rem rgb(0 0 0 / 20%),
    0 2.35rem 3.35rem var(--shadow),
    0 0 0 0.35rem rgb(77 108 85 / 12%);
}

.rock[data-mood="absolute"] {
  box-shadow:
    inset 1.1rem 1rem 1.4rem rgb(255 255 255 / 22%),
    inset -2rem -2.3rem 2.5rem rgb(0 0 0 / 18%),
    0 2.5rem 3.5rem var(--shadow),
    0 0 0 0.5rem rgb(155 85 53 / 14%);
}

.rock-readout {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.5rem;
}

.rock-readout p {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(2rem, 6vw, 5.2rem);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: 0;
}

.rock-readout dl {
  display: flex;
  gap: 1rem;
  margin: 0;
}

.rock-readout div {
  min-width: 6.5rem;
  padding-top: 0.8rem;
  border-top: 2px solid currentColor;
}

.rock-readout dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.rock-readout dd {
  margin: 0.2rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  font-weight: 900;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 0.25rem 0 1rem;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 800;
}

@media (max-width: 720px) {
  .rock-app {
    grid-template-rows: auto minmax(20rem, 1fr) auto;
    min-height: calc(100vh - 6rem);
  }

  .brand,
  .rock-readout {
    align-items: flex-start;
    flex-direction: column;
  }

  .brand h1 {
    text-align: left;
  }

  .rock-stage {
    min-height: 20rem;
  }

  .rock-aura {
    width: min(88vw, 27rem);
  }

  .rock {
    width: min(74vw, 21rem);
  }

  .rock-readout dl {
    width: 100%;
  }

  .rock-readout div {
    flex: 1;
  }
}