:root {
  --bg: #120a1f;
  --orange: #ff7518;
  --purple: #6b2fa0;
  --green: #9be564;
  --text: #f6eeff;
  --text-dim: #b9a9cf;
  --cell: #21133a;
  --cell-edge: rgba(255, 117, 24, 0.38);
  --title-font: "Creepster", Impact, "Arial Narrow", sans-serif;
  --body-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 480px;
}

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

html {
  background: var(--bg);
  -webkit-text-size-adjust: 100%;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  padding-top: env(safe-area-inset-top);
  background:
    radial-gradient(120% 340px at 50% 0, rgba(107, 47, 160, 0.5), transparent 100%),
    var(--bg);
  background-repeat: no-repeat;
  color: var(--text);
  font-family: var(--body-font);
}

button {
  font: inherit;
  color: inherit;
}

/* Header */

.site-header {
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: var(--max-width);
  margin: auto auto 0;
  padding: 14px 16px 10px;
  text-align: center;
}

h1 {
  position: relative;
  margin: 0;
  color: var(--orange);
  font-family: var(--title-font);
  font-size: clamp(2.4rem, 12vw, 3.25rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.05;
  text-shadow: 0 0 18px rgba(255, 117, 24, 0.5), 0 2px 0 #000;
}

.title-emoji {
  font-size: 0.8em;
  letter-spacing: 0;
  text-shadow: none;
}

.subtitle {
  position: relative;
  margin: 4px 0 0;
  color: var(--green);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.hashtag {
  position: relative;
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.75rem;
}

.hashtag strong {
  color: var(--orange);
  font-weight: 600;
}

.bats {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.bat {
  position: absolute;
  top: 12%;
  left: 0;
  font-size: 16px;
  opacity: 0.32;
  animation: flit 19s linear infinite;
}

.bat:nth-child(2) {
  top: 56%;
  font-size: 12px;
  animation-duration: 27s;
  animation-delay: -11s;
}

.bat:nth-child(3) {
  top: 30%;
  font-size: 10px;
  animation-duration: 23s;
  animation-delay: -18s;
}

@keyframes flit {
  0% { transform: translate(-30px, 0); }
  25% { transform: translate(25vw, -7px); }
  50% { transform: translate(50vw, 6px); }
  75% { transform: translate(75vw, -5px); }
  100% { transform: translate(calc(100vw + 30px), 0); }
}

@media (min-width: 480px) {
  @keyframes flit {
    0% { transform: translate(-30px, 0); }
    50% { transform: translate(240px, 6px); }
    100% { transform: translate(510px, 0); }
  }
}

/* Board */

main {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto auto;
  padding: 0 8px;
}

.board {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 4px;
}

.cell {
  position: relative;
  aspect-ratio: 1;
  min-width: 0;
  padding: 2px 1px;
  overflow: hidden;
  border: 1px solid var(--cell-edge);
  border-radius: 9px;
  background: linear-gradient(160deg, #2a1847, var(--cell));
  color: var(--text);
  font-size: clamp(9px, 2.8vw, 13px);
  font-weight: 600;
  line-height: 1.16;
  text-align: center;
  overflow-wrap: anywhere;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform 80ms ease-out, background-color 120ms ease;
}

.cell:active {
  transform: scale(0.96);
}

.cell:focus-visible,
.action:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* Sits above the stamp so a stamped square stays readable. */
.cell-text {
  position: relative;
  z-index: 1;
  display: block;
}

/* The stamp is drawn entirely in CSS and tilted a little differently per cell. */
.cell::after {
  content: "🎃";
  content: "🎃" / "";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: clamp(32px, 10.5vw, 46px);
  line-height: 1;
  opacity: 0;
  transform: rotate(var(--tilt, -8deg)) scale(1.5);
  pointer-events: none;
}

.cell:nth-child(3n) { --tilt: 9deg; }
.cell:nth-child(4n + 1) { --tilt: -14deg; }
.cell:nth-child(5n + 2) { --tilt: 5deg; }
.cell:nth-child(7n) { --tilt: 15deg; }

.cell[aria-pressed="true"] {
  border-color: var(--orange);
  background: #33190f;
  box-shadow: inset 0 0 12px rgba(255, 117, 24, 0.3);
}

.cell[aria-pressed="true"] .cell-text {
  color: #e2d8ee;
  text-shadow: 0 0 3px #000, 0 0 3px #000, 0 1px 2px #000;
}

.cell[aria-pressed="true"]::after {
  opacity: 0.6;
  transform: rotate(var(--tilt, -8deg)) scale(1);
  animation: stamp 180ms cubic-bezier(0.3, 1.5, 0.6, 1);
}

@keyframes stamp {
  from {
    opacity: 0;
    transform: rotate(var(--tilt, -8deg)) scale(1.7);
  }
}

.cell--free,
.cell--free[aria-pressed="true"] {
  border-color: var(--green);
  background: radial-gradient(circle, #3a2460, var(--cell));
  box-shadow: 0 0 12px rgba(155, 229, 100, 0.55);
  cursor: default;
}

.cell--free[aria-pressed="true"] .cell-text {
  color: var(--green);
  text-shadow: none;
  font-size: clamp(11px, 3.2vw, 15px);
  font-weight: 800;
  letter-spacing: 0.06em;
}

.cell--free:active {
  transform: none;
}

.cell--free::after,
.cell--free[aria-pressed="true"]::after {
  content: none;
}

.free-emoji {
  display: block;
  margin-bottom: 1px;
  font-size: clamp(20px, 6.4vw, 28px);
  line-height: 1;
}

.cell--win,
.cell--win[aria-pressed="true"] {
  border-color: var(--green);
  box-shadow: 0 0 0 1px var(--green), 0 0 12px rgba(155, 229, 100, 0.7);
}

.cell--win[aria-pressed="true"] {
  background: #23331a;
}

.status-row {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  margin-top: 4px;
}

.status {
  margin: 0;
  padding: 0 38px;
  color: var(--text-dim);
  font-size: 0.8rem;
  text-align: center;
}

.info-button {
  position: absolute;
  top: 50%;
  right: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  transform: translateY(-50%);
  -webkit-appearance: none;
  appearance: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.info-button span {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8125rem;
  font-style: italic;
  font-weight: 700;
  line-height: 1;
}

.info-button:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -2px;
}

.status--flash {
  color: var(--green);
  animation: flash 1.6s ease-out forwards;
}

@keyframes flash {
  0% { opacity: 0; }
  12%, 65% { opacity: 1; }
  100% { opacity: 0; }
}

/* Bottom bar */

.actions {
  position: sticky;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px 8px max(10px, env(safe-area-inset-bottom));
  background: linear-gradient(transparent, var(--bg) 22%);
}

.action {
  min-height: 48px;
  padding: 6px 4px;
  border: 1px solid var(--purple);
  border-radius: 11px;
  background: #2a1647;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.1;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.action:active {
  background: #3b2062;
}

.action--primary {
  border-color: var(--orange);
  background: var(--orange);
  color: #1c0d02;
}

.action--primary:active {
  background: #e4620d;
}

/* Dialogs */

dialog {
  color: var(--text);
}

dialog::backdrop {
  background: rgba(8, 4, 15, 0.78);
}

.confirm {
  width: min(340px, calc(100vw - 32px));
  padding: 20px 16px 16px;
  border: 1px solid var(--purple);
  border-radius: 16px;
  background: #1d1033;
}

.confirm-message {
  margin: 0 0 16px;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
  text-align: center;
}

.confirm-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.win {
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 24px;
  border: 0;
  background: radial-gradient(circle, rgba(107, 47, 160, 0.88), rgba(18, 10, 31, 0.97) 72%);
}

.win[open] {
  display: grid;
  place-items: center;
}

.win-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: win-in 420ms cubic-bezier(0.2, 1.5, 0.4, 1);
}

.win-title {
  margin: 0;
  color: var(--orange);
  font-family: var(--title-font);
  font-size: clamp(4rem, 21vw, 6.5rem);
  letter-spacing: 0.03em;
  line-height: 1;
  text-align: center;
  text-shadow: 0 0 28px rgba(255, 117, 24, 0.75), 0 3px 0 #000;
}

.win-detail {
  max-width: 340px;
  margin: 16px 0 28px;
  color: var(--text);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  white-space: pre-line;
}

.about {
  text-align: center;
}

.about-title {
  margin: 0 0 12px;
  color: var(--orange);
  font-family: var(--title-font);
  font-size: 2.25rem;
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1.1;
}

.about p {
  margin: 0 0 12px;
  font-size: 1rem;
  line-height: 1.4;
}

.about .about-credit {
  margin: 16px 0;
  color: var(--text-dim);
  font-size: 0.875rem;
  line-height: 1.7;
}

.about a {
  display: inline-block;
  padding: 2px 6px;
  color: var(--green);
  font-weight: 600;
}

.about-close {
  width: 100%;
}

.win-dismiss {
  min-width: 180px;
  min-height: 52px;
  font-size: 1.0625rem;
}

@keyframes win-in {
  from {
    opacity: 0;
    transform: scale(0.6) rotate(-4deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .bat,
  .cell[aria-pressed="true"]::after,
  .win-content {
    animation: none;
  }

  .cell {
    transition: none;
  }
}