:root {
  --ink: #0e1a1f;
  --mist: #d7e4df;
  --foam: #f2f7f4;
  --teal: #1f6f6a;
  --teal-glow: #2f9a8f;
  --ember: #c45c26;
  --ember-glow: #e07a3a;
  --n: 3;
  --page-pad-x: clamp(0.85rem, 4vw, 2rem);
  --board-pad: clamp(0.7rem, 2.6vw, 1.5rem);
  --board-margin: clamp(0.4rem, 1.8vw, 0.85rem);
  --board-margin-y: clamp(0.15rem, 0.8vw, 0.35rem);
  --slot-cap: clamp(2rem, 8.5vmin, 6rem);
  --gap: clamp(0.18rem, 1.4vmin, 0.7rem);
  --chrome: 11.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --bg: var(--ink);
  --text: var(--foam);
  --tint: var(--mist);
  --heading-start: var(--foam);
  --atmosphere:
    radial-gradient(ellipse 80% 55% at 15% 10%, rgba(47, 154, 143, 0.28), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 85%, rgba(196, 92, 38, 0.18), transparent 50%),
    linear-gradient(165deg, #16343a 0%, #0e1a1f 45%, #1a1410 100%);
  --grain: 0.35;
  --board-bg: color-mix(in srgb, #0a1216 55%, transparent);
  --board-edge: rgba(255, 255, 255, 0.06);
  --board-shadow: rgba(0, 0, 0, 0.28);
  --rock-face: radial-gradient(circle at 50% 55%, #e88a4a, #8f3d14);
  --rock-reject: radial-gradient(circle at 50% 55%, #3cb8ab, #1a5c57);
  --rock-shade: rgba(0, 0, 0, 0.25);
}

:root[data-theme="light"] {
  --bg: var(--foam);
  --text: #16292f;
  --tint: #3d5b5f;
  --heading-start: var(--ink);
  --atmosphere:
    radial-gradient(ellipse 80% 55% at 15% 10%, rgba(47, 154, 143, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 90% 85%, rgba(224, 122, 58, 0.16), transparent 50%),
    linear-gradient(165deg, #eaf3ee 0%, #f6faf7 45%, #fbf3ec 100%);
  --grain: 0.18;
  --board-bg: color-mix(in srgb, #ffffff 62%, transparent);
  --board-edge: rgba(255, 255, 255, 0.85);
  --board-shadow: rgba(24, 47, 52, 0.14);
  --rock-face: radial-gradient(circle at 50% 55%, #eb925e, #ba6037);
  --rock-reject: radial-gradient(circle at 50% 55%, #2f9a8f, #17544f);
  --rock-shade: rgba(0, 0, 0, 0.18);
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  min-height: 100dvh;
  display: grid;
  place-items: center;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

button {
  touch-action: manipulation;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--atmosphere);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: var(--grain);
  /* background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.15'/%3E%3C/svg%3E"); */
  pointer-events: none;
  mix-blend-mode: soft-light;
}

.brand h1,
.count {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  background: linear-gradient(120deg, var(--heading-start) 20%, var(--teal) 55%, var(--ember) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

:root:not([data-theme="light"]) .brand h1,
:root:not([data-theme="light"]) .count {
  background-image: linear-gradient(120deg, var(--heading-start) 20%, var(--teal-glow) 55%, var(--ember-glow) 95%);
}

.chrome {
  display: contents;
}

.brand {
  position: fixed;
  top: max(clamp(1.1rem, 3vw, 2rem), env(safe-area-inset-top));
  left: max(clamp(1.1rem, 3vw, 2.25rem), env(safe-area-inset-left));
  z-index: 1;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.25rem, 3.2vw, 1.9rem);
}

.app {
  width: min(100%, 84rem);
  padding:
    clamp(4.5rem, 12vw, 6rem)
    max(var(--page-pad-x), env(safe-area-inset-right))
    clamp(2.5rem, 6vw, 3.5rem)
    max(var(--page-pad-x), env(safe-area-inset-left));
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1.25rem, 5vw, 3rem);
}

.size {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  gap: clamp(0.75rem, 2.5vw, 1.4rem);
}

.count {
  margin: 0;
  font-size: clamp(2rem, 8vw, 3.6rem);
  min-width: 5.5ch;
}

.chev {
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--tint) 16%, transparent);
  border-radius: 50%;
  background: transparent;
  color: color-mix(in srgb, var(--tint) 62%, transparent);
  cursor: pointer;
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease),
    opacity 0.25s var(--ease);
}

.chev svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (hover: hover) and (pointer: fine) {
  .chev:hover:not(:disabled) {
    color: var(--ember-glow);
    border-color: color-mix(in srgb, var(--ember-glow) 45%, transparent);
    transform: scale(1.06);
  }
}

.chev:disabled {
  opacity: 0.28;
  cursor: default;
}

.board {
  --fit-w: calc(
    var(--n) * var(--slot-cap) + (var(--n) - 1) * var(--gap) + 2 * var(--board-pad)
  );
  --fit-h: calc(
    var(--n) * (100dvh - var(--chrome) - 2 * var(--board-pad) - var(--n) * var(--gap)) /
      (var(--n) + 1) + (var(--n) - 1) * var(--gap) + 2 * var(--board-pad)
  );
  width: min(calc(100% - 2 * var(--board-margin)), var(--fit-w), max(8rem, var(--fit-h)));
  min-width: 0;
  margin: var(--board-margin-y) var(--board-margin);
  display: flex;
  flex-direction: column;
  gap: var(--gap);
  padding: var(--board-pad);
  border-radius: clamp(0.85rem, 3vw, 1.35rem);
  background: var(--board-bg);
  box-shadow:
    inset 0 1px 0 var(--board-edge),
    0 24px 48px var(--board-shadow);
  transition: opacity 0.45s var(--ease), filter 0.45s var(--ease);
  user-select: none;
  -webkit-user-select: none;
}

.board.game-over {
  opacity: 0.72;
  filter: saturate(0.85);
}

.row {
  display: grid;
  grid-template-columns: repeat(var(--n), minmax(0, 1fr));
  gap: var(--gap);
}

.slot {
  width: auto;
  aspect-ratio: 1;
  height: auto;
  min-width: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: transparent;
  position: relative;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.slot:disabled {
  cursor: default;
}

.slot.ghost {
  visibility: hidden;
  pointer-events: none;
}

.slot::before {
  content: "";
  position: absolute;
  inset: 18%;
  border-radius: 50%;
  border: 1.5px solid color-mix(in srgb, var(--tint) 18%, transparent);
}

.rock {
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.35), transparent 42%),
    var(--rock-face);
  box-shadow:
    0 2px 4px var(--rock-shade),
    inset 0 -3px 6px var(--rock-shade);
  transition:
    transform 0.3s var(--ease),
    opacity 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.rock::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  opacity: 0;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.35), transparent 42%),
    var(--rock-reject);
  transition: opacity 0.4s var(--ease);
}

.slot.empty .rock {
  opacity: 0;
  transform: scale(0.35);
}

.slot.filled:focus-visible .rock {
  transform: scale(1.08);
  box-shadow:
    0 4px 12px var(--rock-shade),
    0 0 0 3px color-mix(in srgb, var(--tint) 24%, transparent),
    inset 0 -3px 6px var(--rock-shade);
}

@media (hover: hover) and (pointer: fine) {
  .slot.filled:hover .rock {
    transform: scale(1.08);
    box-shadow:
      0 4px 12px var(--rock-shade),
      0 0 0 3px color-mix(in srgb, var(--tint) 24%, transparent),
      inset 0 -3px 6px var(--rock-shade);
  }
}

.slot.filled:active .rock {
  transform: scale(0.94);
}

.slot.reject .rock::after {
  animation: refuse 0.75s var(--ease);
}

.slot:focus-visible {
  outline: none;
}

@keyframes refuse {
  0%,
  55% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}

.reset {
  margin-top: clamp(-1.25rem, -3vw, -0.5rem);
  font: inherit;
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--tint) 45%, transparent);
  background: transparent;
  border: none;
  padding: 0.4rem 0.2rem;
  cursor: pointer;
  transition: color 0.25s var(--ease);
}

@media (hover: hover) and (pointer: fine) {
  .reset:hover {
    color: var(--ember-glow);
  }
}

.reset:focus-visible {
  color: var(--ember-glow);
  outline: none;
}

.theme {
  position: fixed;
  bottom: max(clamp(1.1rem, 3vw, 2rem), env(safe-area-inset-bottom));
  left: max(clamp(1.1rem, 3vw, 2.25rem), env(safe-area-inset-left));
  z-index: 1;
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--tint) 16%, transparent);
  border-radius: 50%;
  background: transparent;
  color: color-mix(in srgb, var(--tint) 62%, transparent);
  cursor: pointer;
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.theme svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme svg:not([data-active]) {
  display: none;
}

@media (hover: hover) and (pointer: fine) {
  .theme:hover {
    color: var(--ember-glow);
    border-color: color-mix(in srgb, var(--ember-glow) 45%, transparent);
    transform: scale(1.06);
  }
}

.rules {
  position: fixed;
  bottom: max(clamp(1.1rem, 3vw, 2rem), env(safe-area-inset-bottom));
  right: max(clamp(1.1rem, 3vw, 2.25rem), env(safe-area-inset-right));
  z-index: 1;
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--tint) 16%, transparent);
  border-radius: 50%;
  background: transparent;
  color: color-mix(in srgb, var(--tint) 62%, transparent);
  cursor: pointer;
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.rules svg {
  width: 1.4rem;
  height: 1.4rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sheet-close svg {
  width: 1.15rem;
  height: 1.15rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (hover: hover) and (pointer: fine) {
  .rules:hover {
    color: var(--ember-glow);
    transform: scale(1.06);
  }

  .sheet-close:hover {
    color: var(--ember-glow);
    border-color: color-mix(in srgb, var(--ember-glow) 45%, transparent);
    transform: scale(1.06);
  }
}

.sheet {
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  padding: clamp(1rem, 5vw, 2.5rem);
  border: none;
  background: transparent;
  color: var(--text);
  display: none;
  place-items: center;
  overflow: auto;
  overscroll-behavior: contain;
}

.sheet[open] {
  display: grid;
}

.sheet::backdrop {
  background: color-mix(in srgb, var(--ink) 62%, transparent);
  backdrop-filter: blur(6px);
}

.sheet-body {
  width: min(100%, 34rem);
  padding: clamp(1.35rem, 4vw, 2.25rem);
  border-radius: clamp(0.9rem, 3vw, 1.35rem);
  background: var(--board-bg);
  box-shadow:
    inset 0 1px 0 var(--board-edge),
    0 24px 48px var(--board-shadow);
  backdrop-filter: blur(12px);
  text-align: left;
  animation: sheet-in 0.35s var(--ease);
}

:root[data-theme="light"] .sheet-body {
  background: color-mix(in srgb, #ffffff 88%, transparent);
}

:root:not([data-theme="light"]) .sheet-body {
  background: color-mix(in srgb, #0a1216 82%, transparent);
}

@keyframes sheet-in {
  from {
    opacity: 0;
    transform: translateY(0.75rem) scale(0.98);
  }
}

.sheet-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(0.5rem, 2vw, 1rem);
}

.sheet-head h2 {
  margin: 0;
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.4rem, 4.5vw, 1.9rem);
  letter-spacing: -0.03em;
  background: linear-gradient(120deg, var(--heading-start) 20%, var(--teal) 55%, var(--ember) 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

:root:not([data-theme="light"]) .sheet-head h2 {
  background-image: linear-gradient(120deg, var(--heading-start) 20%, var(--teal-glow) 55%, var(--ember-glow) 95%);
}

.sheet-close {
  flex: none;
  width: 2.4rem;
  height: 2.4rem;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--tint) 16%, transparent);
  border-radius: 50%;
  background: transparent;
  color: color-mix(in srgb, var(--tint) 62%, transparent);
  cursor: pointer;
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}

.sheet-body h3 {
  margin: 0 0 0.3rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--tint) 58%, transparent);
}

.sheet-body p {
  margin: 0;
  font-size: clamp(0.95rem, 2.6vw, 1.02rem);
  line-height: 1.6;
  color: color-mix(in srgb, var(--text) 88%, transparent);
}

.sheet-body section + section {
  margin-top: clamp(1rem, 3vw, 1.35rem);
}

.sheet-body em {
  font-family: "Fraunces", Georgia, serif;
  font-style: normal;
  color: var(--ember-glow);
}

.sheet-body strong {
  font-weight: 600;
  color: var(--teal-glow);
}

@media (max-width: 720px), (max-height: 540px) {
  :root {
    --slot-cap: 100vw;
    --chrome: 16.5rem;
    --page-pad-x: 0.85rem;
  }

  body {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    place-items: unset;
  }

  .chrome {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    padding:
      max(0.7rem, env(safe-area-inset-top))
      max(0.85rem, env(safe-area-inset-right))
      0
      max(0.85rem, env(safe-area-inset-left));
  }

  .brand {
    position: static;
  }

  .theme {
    position: fixed;
    bottom: max(1rem, env(safe-area-inset-bottom));
    left: max(0.85rem, env(safe-area-inset-left));
    width: 2.75rem;
    height: 2.75rem;
  }

  .rules {
    bottom: max(1rem, env(safe-area-inset-bottom));
    right: max(0.85rem, env(safe-area-inset-right));
    width: 2.75rem;
    height: 2.75rem;
  }

  .app {
    flex: 1 1 auto;
    justify-content: center;
    width: 100%;
    min-height: 0;
    padding:
      0.85rem
      max(var(--page-pad-x), env(safe-area-inset-right))
      max(4.25rem, calc(env(safe-area-inset-bottom) + 3.25rem))
      max(var(--page-pad-x), env(safe-area-inset-left));
    gap: 1.1rem;
  }

  .chev {
    width: 2.75rem;
    height: 2.75rem;
  }

  .reset {
    margin-top: 0;
    min-height: 2.75rem;
    padding: 0.55rem 0.4rem;
  }
}

@media (max-width: 720px) and (max-height: 480px) {
  :root {
    --chrome: 7.5rem;
  }

  .app {
    gap: 0.65rem;
    padding-top: 0.35rem;
    padding-bottom: max(3.5rem, calc(env(safe-area-inset-bottom) + 2.75rem));
  }

  .count {
    font-size: clamp(1.6rem, 7vw, 2.4rem);
  }

  .reset {
    min-height: 2.25rem;
    padding: 0.25rem 0.4rem;
  }
}

@media (max-height: 540px) and (min-width: 640px) {
  :root {
    --chrome: 7.25rem;
    --slot-cap: 100vw;
  }

  .chrome {
    padding-bottom: 0;
  }

  .app {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: clamp(0.75rem, 2vw, 1.5rem);
    padding:
      0.35rem
      max(1rem, env(safe-area-inset-right))
      max(3.25rem, calc(env(safe-area-inset-bottom) + 2.5rem))
      max(1rem, env(safe-area-inset-left));
  }

  .size {
    flex-direction: column;
    gap: 0.45rem;
  }

  .count {
    font-size: clamp(1.5rem, 6vh, 2.2rem);
    min-width: 0;
  }

  .reset {
    min-height: 2.5rem;
    padding: 0.4rem 0.35rem;
  }
}