:root {
  --ink: #163328;
  --ink-soft: #355747;
  --leaf: #2f7a4f;
  --leaf-deep: #184a31;
  --moss: #6fbf7a;
  --sun: #ffd166;
  --accent: #1f8a7a;
  --sky-top: #7ec8e3;
  --sky-mid: #bfe6f2;
  --board: #246344;
  --board-edge: #174530;
  --tile-back: #1f8a7a;
  --tile-face: #f3fffb;
  --panel: rgba(243, 255, 251, 0.88);
  --shadow: 0 18px 40px rgba(22, 51, 40, 0.18);
  --radius-tile: 999px;
  --font-display: "Fredoka", sans-serif;
  --font-body: "Nunito", sans-serif;
}

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

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

body {
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--sky-mid);
  overflow-x: hidden;
}

button {
  font: inherit;
  cursor: pointer;
  border: 0;
}

.is-hidden {
  display: none !important;
}

.sky,
.meadow {
  pointer-events: none;
}

.sky {
  position: fixed;
  inset: 0 0 42% 0;
  background:
    radial-gradient(circle at 18% 22%, rgba(255, 255, 255, 0.7), transparent 28%),
    radial-gradient(circle at 78% 18%, rgba(255, 244, 180, 0.55), transparent 26%),
    linear-gradient(180deg, var(--sky-top), var(--sky-mid));
  z-index: 0;
  animation: sky-drift 18s ease-in-out infinite alternate;
}

.meadow {
  position: fixed;
  inset: 48% 0 0 0;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(255, 255, 255, 0.18), transparent 40%),
    linear-gradient(180deg, #7ec47a 0%, #3f8f57 42%, #2d6b42 100%);
  z-index: 0;
}

.meadow::before,
.meadow::after {
  content: "";
  position: absolute;
  left: -5%;
  right: -5%;
  height: 90px;
  background: radial-gradient(ellipse at center, #8fd08a 0%, #8fd08a 45%, transparent 46%);
  background-size: 70px 50px;
  opacity: 0.55;
}

.meadow::before {
  top: -28px;
}

.meadow::after {
  top: 18px;
  opacity: 0.35;
  transform: scaleX(-1);
}

.shell {
  position: relative;
  z-index: 1;
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(1.25rem, 4vw, 2.5rem) 0 3rem;
  min-height: 100dvh;
  display: grid;
  align-content: start;
  gap: 1.25rem;
}

.brand-block {
  text-align: center;
  animation: rise-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.8rem, 10vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--leaf-deep);
  text-shadow: 0 2px 0 rgba(255, 255, 255, 0.35);
}

.headline {
  margin: 0.55rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.25rem, 3.6vw, 1.8rem);
  color: var(--ink);
}

.support {
  margin: 0.45rem auto 0;
  max-width: 34rem;
  color: var(--ink-soft);
  font-weight: 700;
  font-size: 1.02rem;
}

.setup {
  display: grid;
  gap: 1rem;
  justify-items: center;
  animation: rise-in 0.8s 0.08s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.difficulty {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
  width: min(560px, 100%);
}

.diff-btn-travel {
  grid-column: 1 / -1;
}

.diff-btn {
  display: grid;
  gap: 0.15rem;
  padding: 0.9rem 0.7rem;
  border-radius: 1.2rem;
  background: var(--panel);
  color: var(--ink);
  font-weight: 800;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, background 0.2s ease, outline-color 0.2s ease;
  outline: 3px solid transparent;
}

.diff-btn span {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.diff-btn:hover {
  transform: translateY(-2px);
}

.diff-btn.is-selected {
  background: var(--sun);
  outline-color: rgba(31, 82, 54, 0.25);
}

.cta,
.ghost-btn {
  border-radius: 999px;
  padding: 0.95rem 1.6rem;
  font-weight: 800;
  transition: transform 0.18s ease, filter 0.18s ease;
}

.cta {
  background: linear-gradient(180deg, #2aa894, var(--accent));
  color: white;
  box-shadow: 0 12px 24px rgba(31, 138, 122, 0.35);
  min-width: 12rem;
}

.cta:hover,
.ghost-btn:hover {
  transform: translateY(-2px) scale(1.02);
}

.ghost-btn {
  background: var(--panel);
  color: var(--leaf-deep);
  padding: 0.65rem 1rem;
}

.play {
  display: grid;
  gap: 1rem;
  animation: rise-in 0.55s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
  align-items: center;
}

.stat {
  min-width: 5.5rem;
  padding: 0.55rem 0.85rem;
  border-radius: 1rem;
  background: var(--panel);
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 800;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
}

.board-wrap {
  padding: clamp(0.85rem, 2.5vw, 1.35rem);
  border-radius: 2rem;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.12), transparent 35%),
    linear-gradient(160deg, #2f8a56, var(--board) 55%, var(--board-edge));
  box-shadow: var(--shadow), inset 0 0 0 4px rgba(255, 255, 255, 0.08);
}

.board-wrap[data-theme="travel"] {
  padding: clamp(0.55rem, 2vw, 1rem);
  border-radius: 1.4rem;
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.35), transparent 40%),
    linear-gradient(165deg, #d7e0c8 0%, #b7c6a4 48%, #9aaf87 100%);
  box-shadow:
    var(--shadow),
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    inset 0 -10px 24px rgba(70, 90, 55, 0.12);
}

.travel-frame {
  display: grid;
  gap: 0.55rem;
  width: min(100%, 560px);
  margin: 0 auto;
  padding: clamp(0.7rem, 2.4vw, 1.1rem);
  background:
    linear-gradient(160deg, #cfd9bd 0%, #b4c4a0 42%, #9eb18a 100%);
  clip-path: polygon(18% 0, 82% 0, 100% 18%, 100% 82%, 82% 100%, 18% 100%, 0 82%, 0 18%);
  box-shadow:
    inset 0 0 0 3px rgba(255, 255, 255, 0.28),
    inset 0 0 0 8px rgba(120, 140, 95, 0.18),
    0 16px 28px rgba(60, 80, 45, 0.18);
}

.travel-row {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr) 2.6rem;
  gap: 0.45rem;
  align-items: center;
}

.travel-pocket {
  min-height: 2.4rem;
  border-radius: 0.7rem;
  background: rgba(84, 104, 70, 0.18);
  box-shadow: inset 0 2px 6px rgba(50, 70, 40, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  position: relative;
  overflow: hidden;
}

.travel-pocket-top,
.travel-pocket-bottom {
  min-height: 2.7rem;
}

.travel-pocket-side {
  min-height: 8.5rem;
  flex-direction: column;
  writing-mode: horizontal-tb;
}

.hex-board {
  display: grid;
  gap: 0.28rem;
  justify-items: center;
  padding: 0.2rem 0;
}

.hex-row {
  display: grid;
  grid-template-columns: repeat(var(--row-count), minmax(0, 1fr));
  gap: 0.28rem;
  width: min(100%, calc(var(--row-count) * 3.1rem));
}

.hex-well {
  aspect-ratio: 1;
  border-radius: 999px;
  background:
    radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.14), transparent 40%),
    radial-gradient(circle at 50% 55%, #8fa57a 0%, #7d9470 70%, #6d8462 100%);
  box-shadow:
    inset 0 3px 7px rgba(40, 55, 30, 0.35),
    inset 0 -1px 0 rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  padding: 7%;
}

.hex-well.is-empty::after {
  content: "";
  width: 58%;
  height: 58%;
  border-radius: 999px;
  background: rgba(55, 70, 40, 0.16);
  box-shadow: inset 0 2px 4px rgba(30, 40, 20, 0.25);
}

.hex-well .tile {
  width: 100%;
  filter: drop-shadow(0 2px 2px rgba(40, 50, 30, 0.2));
}

.board-wrap[data-theme="travel"] .tile-back {
  background:
    radial-gradient(circle at 50% 45%, #c9b6e0 0%, #b79dcf 48%, #9f82bb 100%);
}

.board-wrap[data-theme="travel"] .tile-back::after {
  content: "";
  width: 42%;
  height: 42%;
  border-radius: 999px;
  background: radial-gradient(circle at 40% 35%, #a888c4, #8e6aad 70%, #7a5898);
  box-shadow:
    inset 0 1px 2px rgba(255, 255, 255, 0.35),
    0 0 0 2px rgba(255, 255, 255, 0.18);
}

.board-wrap[data-theme="travel"] .tile-face {
  box-shadow: 0 3px 6px rgba(50, 40, 30, 0.2);
}

.tile.is-collected {
  opacity: 0;
  transform: scale(0.4);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

.tray-chip-stack {
  position: absolute;
  width: 2.1rem;
  height: 2.1rem;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(calc(var(--stack) * 7deg)) translateY(calc(var(--stack) * -3px));
  box-shadow: 0 2px 5px rgba(40, 50, 30, 0.25);
}

.board {
  display: grid;
  gap: clamp(0.45rem, 1.8vw, 0.8rem);
  justify-content: center;
}

.board[data-cols="4"] {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.board[data-cols="5"] {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.board[data-cols="6"] {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.tile {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-tile);
  background: transparent;
  padding: 0;
  position: relative;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  appearance: none;
  -webkit-appearance: none;
}

.tile:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 3px;
}

.tile-inner {
  display: block;
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
}

.tile.is-flipped .tile-inner,
.tile.is-matched .tile-inner {
  transform: rotateY(180deg);
  -webkit-transform: rotateY(180deg);
}

.tile-face {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.18);
  pointer-events: none;
}

.tile-back {
  background:
    radial-gradient(circle at 30% 25%, rgba(255, 255, 255, 0.28), transparent 40%),
    linear-gradient(145deg, #2db8a4, var(--tile-back) 60%, #14685c);
}

.tile-back::after {
  content: "🐾";
  font-size: clamp(1.1rem, 4vw, 1.7rem);
  filter: drop-shadow(0 2px 0 rgba(0, 0, 0, 0.12));
}

.tile-front {
  background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, 0.55), transparent 42%),
    var(--sticker-bg, var(--tile-face));
  transform: rotateY(180deg);
  -webkit-transform: rotateY(180deg);
  padding: 8%;
  overflow: hidden;
}

.sticker {
  width: 100%;
  height: 100%;
  display: block;
  filter: drop-shadow(0 2px 2px rgba(42, 37, 31, 0.12));
}

.tile.is-matched {
  pointer-events: none;
}

.tile.is-matched .tile-front {
  animation: match-pop 0.55s cubic-bezier(0.2, 0.9, 0.2, 1);
}

.tile.is-mismatch .tile-inner {
  animation: mismatch-shake 0.45s ease;
}

.tray {
  min-height: 3.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  align-items: center;
}

.tray-chip {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--sticker-bg, var(--panel));
  box-shadow: var(--shadow);
  padding: 0.15rem;
  overflow: hidden;
  animation: chip-in 0.35s cubic-bezier(0.2, 0.9, 0.2, 1) both;
}

.tray-chip .sticker {
  width: 100%;
  height: 100%;
}

.win {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(28, 46, 36, 0.42);
  backdrop-filter: blur(4px);
  z-index: 20;
  animation: fade-in 0.25s ease both;
}

.win-card {
  width: min(420px, 100%);
  padding: 1.8rem 1.4rem;
  border-radius: 1.6rem;
  text-align: center;
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 209, 102, 0.4), transparent 45%),
    linear-gradient(180deg, #f3fffb, #d9f3ea);
  box-shadow: var(--shadow);
  animation: rise-in 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.win-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--leaf-deep);
}

.win-card h2 {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-size: 1.55rem;
}

.win-card p:last-of-type {
  margin: 0.45rem 0 1.1rem;
  color: var(--ink-soft);
  font-weight: 700;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes match-pop {
  0% {
    transform: rotateY(180deg) scale(1);
  }
  45% {
    transform: rotateY(180deg) scale(1.12);
  }
  100% {
    transform: rotateY(180deg) scale(1);
  }
}

@keyframes mismatch-shake {
  0%,
  100% {
    transform: rotateY(180deg) translateX(0);
  }
  25% {
    transform: rotateY(180deg) translateX(-6px);
  }
  75% {
    transform: rotateY(180deg) translateX(6px);
  }
}

@keyframes chip-in {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes sky-drift {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.04) translateY(-1%);
  }
}

@media (max-width: 560px) {
  .difficulty {
    grid-template-columns: 1fr 1fr;
  }

  .board[data-cols="6"] {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .travel-row {
    grid-template-columns: 2.1rem minmax(0, 1fr) 2.1rem;
  }

  .hex-row {
    width: min(100%, calc(var(--row-count) * 2.55rem));
    gap: 0.22rem;
  }

  .tray-chip-stack {
    width: 1.7rem;
    height: 1.7rem;
  }

  .hud {
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}