:root {
  --paper: #f7edda;
  --paper-deep: #efe0c4;
  --ink: #30281f;
  --ink-soft: #6f6253;
  --line: #4b3928;
  --orange: #e88724;
  --gold: #f2bd32;
  --coral: #e99579;
  --moss: #78805a;
  --cream: #fff8ea;
  --shadow: rgba(83, 55, 27, 0.16);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --display: "M PLUS Rounded 1c", "Hiragino Maru Gothic ProN", sans-serif;
  --body: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
}

* { box-sizing: border-box; }

html { min-width: 320px; background: #efe3cf; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(255,255,255,.66), transparent 24rem),
    radial-gradient(circle at 88% 92%, rgba(216,177,117,.19), transparent 30rem),
    var(--paper);
  font-family: var(--body);
}

button, summary { font: inherit; }
button { color: inherit; }

.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  z-index: 100;
  background-image:
    repeating-radial-gradient(circle at 20% 30%, rgba(80,49,22,.17) 0 .6px, transparent .7px 4px),
    repeating-linear-gradient(102deg, transparent 0 8px, rgba(90,61,30,.035) 9px 10px);
  mix-blend-mode: multiply;
}

.app-shell {
  width: min(1420px, calc(100% - 40px));
  margin: 0 auto;
  padding: 20px 0 18px;
}

.topbar {
  min-height: 70px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  border-bottom: 2px solid var(--ink);
}

.brand {
  width: max-content;
  position: relative;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
}

.brand-word {
  font: 800 31px/1 var(--display);
  letter-spacing: .04em;
}

.brand-paw {
  position: absolute;
  right: -9px;
  top: -7px;
  font-size: 8px;
  box-shadow: -6px -4px 0 -1px var(--ink), 0 -7px 0 -1px var(--ink), 6px -4px 0 -1px var(--ink);
  transform: rotate(10deg);
}

.title-lockup { text-align: center; display: grid; gap: 1px; }
.title-lockup .work-no { font: 700 9px/1 var(--display); letter-spacing: .24em; color: var(--ink-soft); }
.title-lockup strong { font: 800 19px/1.2 var(--display); letter-spacing: .08em; }

.sound-button {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 13px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: rgba(255,248,234,.72);
  font: 800 11px/1 var(--display);
  box-shadow: 2px 3px 0 var(--shadow);
  cursor: pointer;
}

.sound-button:focus-visible,
.primary-button:focus-visible,
.secondary-button:focus-visible,
.share-button:focus-visible,
.result-view-actions button:focus-visible,
.playfield:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 286px;
  gap: 18px;
  padding-top: 16px;
}

.game-card {
  min-width: 0;
  border: 2px solid var(--ink);
  border-radius: var(--radius-lg);
  background: rgba(255,248,234,.56);
  box-shadow: 6px 8px 0 rgba(75,57,40,.09);
  overflow: hidden;
}

.game-heading {
  min-height: 86px;
  padding: 14px 20px 12px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 2px dashed rgba(75,57,40,.38);
}

.eyebrow {
  margin: 0 0 2px;
  color: var(--orange);
  font: 800 10px/1 var(--display);
  letter-spacing: .18em;
}

h1 {
  margin: 0;
  font: 800 clamp(23px, 2.2vw, 34px)/1.22 var(--display);
  letter-spacing: .025em;
}

h1 em { color: var(--orange); font-style: normal; }
.micro-rule { margin: 0; flex: 0 0 auto; color: var(--ink-soft); text-align: right; font-size: 12px; line-height: 1.65; }

.playfield-wrap { padding: 12px; }

.playfield {
  --stage-h: min(66vh, 660px);
  position: relative;
  height: var(--stage-h);
  min-height: 480px;
  overflow: hidden;
  border: 2px solid var(--ink);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.3), transparent 45%),
    repeating-linear-gradient(0deg, transparent 0 39px, rgba(112,91,64,.045) 40px 41px),
    #f5e9d3;
  cursor: crosshair;
  touch-action: none;
  isolation: isolate;
}

.playfield::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .28;
  background-image: radial-gradient(circle, rgba(70,50,30,.25) 0 .65px, transparent .8px);
  background-size: 7px 7px;
}

.sky-doodle {
  position: absolute;
  color: rgba(232,135,36,.7);
  font: 800 36px/1 var(--display);
  user-select: none;
}
.sky-doodle-left { left: 8%; top: 14%; transform: rotate(-12deg); }
.sky-doodle-right { right: 8%; top: 10%; transform: rotate(10deg); }

.danger-zone {
  position: absolute;
  left: 0;
  right: 0;
  bottom: var(--spill-line-bottom, 45px);
  height: 0;
  border-top: 2px dashed rgba(233,149,121,.58);
}
.danger-zone span {
  position: absolute;
  right: 10px;
  bottom: 7px;
  color: rgba(133,83,65,.68);
  font: 700 9px/1 var(--display);
  letter-spacing: .08em;
}

.cat-layer { position: absolute; inset: 0; z-index: 5; pointer-events: none; }

.physics-cat,
.preview-cat,
.next-cat,
.start-cat,
.evolution-cat {
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  opacity: 0;
  transition: opacity .18s ease;
}

.cats-ready .physics-cat,
.cats-ready .preview-cat,
.cats-ready .next-cat,
.cats-ready .start-cat,
.cats-ready .evolution-cat { opacity: 1; }

.physics-cat {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: center;
  filter: drop-shadow(2px 4px 1px rgba(63,41,20,.16));
  will-change: transform;
}

.cat-level-0 { background-image: var(--cat-0); }
.cat-level-1 { background-image: var(--cat-1); }
.cat-level-2 { background-image: var(--cat-2); }
.cat-level-3 { background-image: var(--cat-3); }
.cat-level-4 { background-image: var(--cat-4); }
.cat-level-5 { background-image: var(--cat-5); }

.drop-guide {
  position: absolute;
  z-index: 12;
  top: 3px;
  width: 86px;
  margin-left: -43px;
  display: grid;
  justify-items: center;
  pointer-events: none;
  transition: opacity .18s ease;
}
.guide-cat { width: 72px; height: 72px; }
.guide-line { width: 1px; height: 58px; margin-top: -6px; border-left: 2px dashed rgba(75,57,40,.42); }
.drop-guide span {
  margin-top: -2px;
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(255,248,234,.85);
  font: 700 9px/1 var(--display);
  white-space: nowrap;
}

.plate {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: 78px;
  width: min(64%, 650px);
  height: 44px;
  margin-left: calc(min(64%, 650px) / -2);
  transform-origin: center;
  filter: drop-shadow(0 9px 4px rgba(71,49,27,.14));
}
.plate-rim {
  position: absolute;
  inset: 0;
  border: 3px solid var(--ink);
  border-radius: 18px 18px 55% 55%;
  background: var(--cream);
  box-shadow: inset 0 7px 0 var(--paper-deep);
}
.plate-face {
  position: absolute;
  inset: 9px 20% 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #9b8264;
  font: 800 8px/1 var(--display);
  letter-spacing: .14em;
}
.plate-paw { font-size: 7px; }

.pivot {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 25px;
  width: 84px;
  height: 60px;
  margin-left: -42px;
  border: 3px solid var(--ink);
  border-radius: 50% 50% 14px 14px;
  background: var(--gold);
  box-shadow: inset -8px -8px 0 rgba(196,126,32,.2), 3px 4px 0 rgba(75,57,40,.13);
}
.pivot-pin {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 17px;
  height: 17px;
  margin-left: -8.5px;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--coral);
}

.effects-canvas { position: absolute; inset: 0; z-index: 20; width: 100%; height: 100%; pointer-events: none; }

.merge-toast {
  position: absolute;
  z-index: 26;
  left: 50%;
  top: 19%;
  padding: 9px 15px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--gold);
  font: 800 12px/1 var(--display);
  box-shadow: 3px 4px 0 rgba(75,57,40,.16);
  opacity: 0;
  transform: translate(-50%, 10px) rotate(-2deg) scale(.86);
  transition: opacity .18s ease, transform .24s cubic-bezier(.2,.8,.2,1.3);
  pointer-events: none;
}
.merge-toast.is-visible { opacity: 1; transform: translate(-50%, 0) rotate(-2deg) scale(1); }

.start-overlay,
.result-overlay {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  background: rgba(247,237,218,.74);
  backdrop-filter: blur(3px);
}
.start-overlay[hidden], .result-overlay[hidden] { display: none; }
.start-cat { width: 132px; height: 132px; margin-bottom: 4px; }
.start-overlay p { margin: 0 0 15px; font: 700 13px/1.6 var(--display); }
.start-overlay small { margin-top: 10px; color: var(--ink-soft); font-size: 10px; }

.primary-button {
  min-width: 194px;
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  padding: 0 22px;
  border: 3px solid var(--ink);
  border-radius: 18px;
  background: var(--gold);
  font: 800 17px/1 var(--display);
  letter-spacing: .06em;
  box-shadow: 4px 5px 0 rgba(75,57,40,.22), inset 0 3px 0 rgba(255,255,255,.3);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
.primary-button:hover { transform: translateY(-2px) rotate(-.4deg); box-shadow: 5px 7px 0 rgba(75,57,40,.2); }
.primary-button:active { transform: translateY(2px); box-shadow: 1px 2px 0 rgba(75,57,40,.22); }

.result-actions-stack { width: min(240px, 100%); display: grid; gap: 8px; }
.result-actions-stack .primary-button { width: 100%; min-width: 0; }
.secondary-button,
.share-button {
  width: 100%;
  min-height: 43px;
  border: 2px solid var(--ink);
  border-radius: 14px;
  font: 800 13px/1 var(--display);
  letter-spacing: .04em;
  box-shadow: 2px 3px 0 rgba(75,57,40,.16);
  cursor: pointer;
}
.secondary-button { background: var(--cream); }
.share-button { color: var(--cream); background: var(--ink); }
.share-button span { margin-right: 5px; font-size: 15px; }
.secondary-button:hover,
.share-button:hover { transform: translateY(-1px); }
.share-button:disabled { opacity: .48; cursor: wait; }
.share-note {
  margin: 2px -18px 0;
  padding-top: 8px;
  border-top: 1px dashed rgba(75,57,40,.34);
  color: var(--ink-soft);
  font-size: 9px;
  font-weight: 700;
  line-height: 1.55;
}

.result-view-actions {
  position: absolute;
  z-index: 31;
  left: 50%;
  bottom: 14px;
  display: flex;
  gap: 8px;
  padding: 7px;
  border: 2px solid var(--ink);
  border-radius: 16px;
  background: rgba(255,248,234,.9);
  box-shadow: 3px 4px 0 rgba(75,57,40,.17);
  backdrop-filter: blur(4px);
  transform: translateX(-50%);
}
.result-view-actions[hidden] { display: none; }
.result-view-actions button {
  min-height: 38px;
  padding: 0 13px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  font: 800 11px/1 var(--display);
  white-space: nowrap;
  cursor: pointer;
}
.result-view-actions button:last-child { color: var(--cream); background: var(--ink); }
.result-view-actions button:disabled { opacity: .48; cursor: wait; }

.result-kicker { margin: 0; color: var(--orange); font: 800 14px/1 var(--display); }
.result-overlay h2 { margin: 5px 0 0; font: 800 68px/1 var(--display); }
.result-overlay h2 small { margin-left: 6px; font-size: 16px; }
#resultMessage { margin: 8px 0 18px; color: var(--ink-soft); font-weight: 700; }

.side-panel { display: grid; align-content: start; gap: 12px; }
.score-card, .next-card, .tilt-card, .howto {
  border: 2px solid var(--ink);
  border-radius: var(--radius-md);
  background: rgba(255,248,234,.68);
  box-shadow: 3px 4px 0 rgba(75,57,40,.08);
}
.score-card { padding: 15px 17px 12px; }
.score-label { margin: 0; color: var(--orange); font: 800 10px/1 var(--display); letter-spacing: .16em; }
.score-value { margin: 2px 0 8px; font: 800 44px/1 var(--display); }
.score-value small { margin-left: 5px; font-size: 12px; }
.best-row { padding-top: 9px; display: flex; justify-content: space-between; border-top: 1px dashed rgba(75,57,40,.38); font-size: 12px; }
.best-row strong { font: 800 14px/1 var(--display); }

.next-card { padding: 14px 16px 8px; }
.card-labels { display: flex; align-items: center; justify-content: space-between; }
.card-labels p { margin: 0; color: var(--orange); font: 800 10px/1 var(--display); letter-spacing: .15em; }
.card-labels span { color: var(--ink-soft); font-size: 11px; font-weight: 700; }
.next-preview { height: 116px; position: relative; display: grid; place-items: center; }
.next-cat { width: 118px; height: 118px; }
.next-arrow { position: absolute; right: 8px; bottom: 14px; color: var(--orange); font: 800 22px/1 var(--display); }

.howto-evolution { padding: 13px 12px 12px; border-top: 1px dashed rgba(75,57,40,.38); }
.evolution-heading { display: flex; align-items: end; justify-content: space-between; gap: 10px; margin: 0 3px 10px; }
.evolution-heading p { margin: 0 0 3px; color: var(--orange); font: 800 9px/1 var(--display); letter-spacing: .16em; }
.evolution-heading h2 { margin: 0; font: 800 14px/1 var(--display); letter-spacing: .05em; }
.evolution-heading > span {
  padding: 4px 7px;
  border: 1px solid rgba(75,57,40,.48);
  border-radius: 999px;
  color: var(--ink-soft);
  background: rgba(247,237,218,.72);
  font: 700 8px/1 var(--display);
}
.evolution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}
.evolution-cell {
  position: relative;
  min-width: 0;
  height: 94px;
  padding: 5px 4px 4px;
  display: grid;
  grid-template-rows: 55px auto auto;
  place-items: center;
  border: 1.5px solid var(--ink);
  border-radius: 9px;
  background: rgba(255,248,234,.7);
  box-shadow: inset 0 -3px 0 rgba(168,108,73,.08);
}
.evolution-cell:nth-child(2),
.evolution-cell:nth-child(5) { background: rgba(242,189,50,.12); }
.evolution-cell.is-final { background: rgba(232,135,36,.17); border-width: 2px; }
.element-no { position: absolute; left: 5px; top: 4px; color: var(--ink-soft); font: 800 7px/1 var(--display); letter-spacing: .04em; }
.evolution-cat { width: 58px; height: 58px; }
.evolution-cell strong { max-width: 100%; overflow: hidden; font: 800 9px/1 var(--display); text-overflow: ellipsis; white-space: nowrap; }
.evolution-cell small { margin-top: 2px; color: var(--orange); font: 800 6px/1 var(--display); letter-spacing: .08em; }
.evolution-cell[data-merge-level].is-made { animation: table-discovered .65s ease both; }
.evolution-note { margin: 9px 2px 0; color: var(--ink-soft); font-size: 9px; line-height: 1.5; }
.evolution-note span { display: inline-grid; width: 19px; height: 19px; margin-right: 4px; place-items: center; border-radius: 5px; color: var(--cream); background: var(--orange); font: 800 7px/1 var(--display); }

@keyframes table-discovered {
  0%, 35% { transform: rotate(-2deg) scale(.93); background: var(--gold); }
  65% { transform: rotate(1deg) scale(1.04); }
  100% { transform: none; }
}

.tilt-card { padding: 14px 16px 12px; }
.tilt-copy { display: flex; justify-content: space-between; align-items: center; font-size: 11px; }
.tilt-copy strong { color: var(--moss); font: 800 11px/1 var(--display); }
.tilt-meter { height: 11px; margin-top: 14px; position: relative; border: 2px solid var(--ink); border-radius: 99px; background: linear-gradient(90deg, var(--coral), var(--gold) 26%, var(--moss) 42% 58%, var(--gold) 74%, var(--coral)); }
.tilt-safe { position: absolute; left: 40%; right: 40%; top: -4px; bottom: -4px; border-left: 1px solid var(--cream); border-right: 1px solid var(--cream); }
.tilt-meter i { position: absolute; left: 50%; top: -7px; width: 3px; height: 21px; border-radius: 2px; background: var(--ink); transform: translateX(-50%); transition: left .1s linear; }
.tilt-ends { display: flex; justify-content: space-between; margin-top: 6px; color: #9b8d7c; font: 700 8px/1 var(--display); letter-spacing: .12em; }

.howto { overflow: hidden; }
.howto summary { padding: 13px 16px; display: flex; justify-content: space-between; list-style: none; font: 800 12px/1 var(--display); cursor: pointer; }
.howto summary::-webkit-details-marker { display: none; }
.howto[open] summary span { transform: rotate(45deg); }
.howto ol { margin: 0; padding: 0 28px 15px 40px; color: var(--ink-soft); font-size: 11px; line-height: 1.75; }

.footer-note { min-height: 42px; display: flex; align-items: end; justify-content: space-between; padding: 12px 2px 0; color: var(--ink-soft); font-size: 10px; }
.footer-note span { font: 800 9px/1 var(--display); letter-spacing: .18em; }
.footer-note p { margin: 0; }

@media (max-width: 900px) {
  .app-shell { width: min(100% - 24px, 720px); padding-top: 10px; }
  .topbar { min-height: 58px; }
  .title-lockup { display: none; }
  .topbar { grid-template-columns: 1fr auto; }
  .brand-word { font-size: 27px; }
  .game-layout { grid-template-columns: 1fr; padding-top: 10px; }
  .side-panel { grid-template-columns: 1fr 1fr; }
  .next-card { grid-row: span 2; }
  .evolution-grid { grid-template-columns: repeat(6, 1fr); }
  .howto { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .app-shell { width: 100%; padding: 0; }
  .topbar { padding: 0 14px; border-bottom-width: 2px; }
  .sound-label { display: none; }
  .sound-button { min-width: 38px; justify-content: center; padding: 0; }
  .game-layout { padding: 0; gap: 10px; }
  .game-card { border-width: 0 0 2px; border-radius: 0 0 22px 22px; box-shadow: none; }
  .game-heading { min-height: 74px; padding: 10px 14px; }
  h1 { font-size: 20px; }
  .micro-rule { display: none; }
  .playfield-wrap { padding: 0 8px 8px; }
  .playfield { --stage-h: 58svh; min-height: 430px; border-radius: 16px; }
  .plate { width: 76%; margin-left: -38%; }
  .side-panel { padding: 0 10px 14px; grid-template-columns: 1fr 1fr; gap: 8px; }
  .score-card { padding: 12px 14px; }
  .score-value { font-size: 35px; }
  .next-card { padding: 11px 12px 5px; }
  .next-preview { height: 96px; }
  .next-cat { width: 98px; height: 98px; }
  .tilt-card { grid-column: 1 / -1; }
  .evolution-grid { grid-template-columns: repeat(3, 1fr); }
  .start-cat { width: 118px; height: 118px; }
  .footer-note { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}