* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: #fbf3e6;
  color: #4a3a30;
  font-family: -apple-system, "Hiragino Maru Gothic ProN", "Hiragino Sans", sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) 12px max(12px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* 上の帯（戻る・やり直す）の下の部分を、残りの場所の真ん中に置く。
   盤が画面の上に寄って、下半分が空かないようにするため（T04） */
.app { min-height: 100vh; min-height: 100dvh; }
.app > .top + * { margin-top: auto; }
.app > :last-child { margin-bottom: auto; }

.top { display: flex; justify-content: space-between; align-items: center; }
.info { font-size: 15px; }

.btn {
  font: inherit;
  font-size: 15px;
  padding: 8px 16px;
  border: none;
  border-radius: 999px;
  background: #e0884a;
  color: #fff;
}
.btn-sub { background: #b9a08a; }

.cat { width: 100%; height: 100%; display: block; overflow: visible; }

/* 盤。マスの大きさ --cell は main.js が画面に合わせて決める */
.play { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.board {
  --cell: 64px;
  --n: 4;
  padding: 8px;
  border-radius: 16px;
  background: #e6d3b8;
  box-shadow: inset 0 0 0 3px #d2b994;
}
.grid {
  width: calc(var(--cell) * var(--n));
  height: calc(var(--cell) * var(--n));
  display: grid;
  grid-template-columns: repeat(var(--n), 1fr);
}
.sq {
  position: relative;
  margin: 3px;
  border-radius: 12px;
  background: #f6ead8;
  touch-action: none;
  -webkit-touch-callout: none;
}
.sq.has { cursor: grab; }
/* 段階ごとの床の色（育つほど濃く・あたたかく） */
.sq.lv1 { background: #f7f1e6; }
.sq.lv2 { background: #fbe3c6; }
.sq.lv3 { background: #dfe8ef; }
.sq.lv4 { background: #f6d7df; }
.sq.lv5 { background: #e0d6f2; }
.sq.lv6, .sq.lv7 { background: #ffe58f; box-shadow: inset 0 0 0 3px #e6b422; }
.sq.dragging-src .unit { opacity: 0.25; }
.sq.can { box-shadow: inset 0 0 0 3px #7cb97a; }
.sq.hover-ok { box-shadow: inset 0 0 0 4px #3f8a3c; background: #d9efcf; }
.sq.hover-move { box-shadow: inset 0 0 0 3px #b9a08a; background: #efe2cc; }
.sq.hover-bad { box-shadow: inset 0 0 0 3px #e06a6a; }
.sq .unit { position: absolute; inset: 0; }
.sq.appear .unit { animation: appear 0.3s ease-out; }
@keyframes appear { from { transform: scale(0.2); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.grid.cleared .sq.goal-cat .unit { animation: hop 0.7s ease-in-out 2; }
@keyframes hop {
  0%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10%); }
}

/* 猫1匹（大きさは段階で変わる。右上に段階の数字） */
.unit svg { display: block; width: 100%; height: 100%; overflow: visible; }

/* 引っぱっている猫（タッチでは指の少し上に出す） */
.floating {
  position: fixed;
  z-index: 5;
  pointer-events: none;
  filter: drop-shadow(0 6px 6px rgba(0, 0, 0, 0.3));
}
.floating svg { display: block; width: 100%; height: 100%; overflow: visible; }

/* 盤の下: 段階の並び */
.ladder { display: flex; align-items: flex-end; justify-content: center; gap: 2px; flex-wrap: nowrap; }
.ladder .step { display: flex; flex-direction: column; align-items: center; width: 46px; font-size: 11px; line-height: 1.2; opacity: 0.45; }
.ladder .step.got { opacity: 1; }
.ladder .step.target { opacity: 1; }
.ladder .step.target .step-name { font-weight: bold; color: #c0661f; }
.ladder .step .step-art { width: 40px; height: 40px; }
.ladder .arrow { font-size: 12px; opacity: 0.5; padding-bottom: 18px; }

.below { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.goal { font-size: 15px; }
.btn-undo { background: #8fb3c9; white-space: nowrap; }
.btn:disabled { opacity: 0.45; }

/* 結果 */
.overlay {
  position: fixed; inset: 0;
  z-index: 10; /* 盤の上の部品より上に重ねる */
  background: rgba(60, 40, 30, 0.45);
  display: flex; align-items: center; justify-content: center;
}
.overlay[hidden] { display: none; }
.overlay-card {
  background: #fffaf2;
  padding: 24px 32px;
  border-radius: 16px;
  text-align: center;
}
.overlay-card p { font-size: 22px; margin: 0 0 16px; }
.overlay-card .overlay-sub { font-size: 15px; margin: -8px 0 14px; opacity: 0.8; }
.overlay-stuck { margin-bottom: 10px; }
.overlay-stuck[hidden], .overlay-stamp[hidden], .overlay-cat[hidden] { display: none; }
.overlay-cat { width: 96px; height: 96px; margin: -4px auto 12px; }
.overlay-buttons { display: flex; gap: 10px; justify-content: center; }
.overlay-stamp { font-size: 15px; margin: 0 0 18px; }
.overlay-paws { display: flex; justify-content: center; gap: 6px; margin-bottom: 6px; }
.overlay-paws .paw { width: 40px; height: 40px; fill: #e5728a; transform: rotate(-12deg); }
.back-link { display: block; margin-top: 8px; font-size: 15px; color: #8a6f5a; text-decoration: none; padding: 8px; }

/* ホーム・遊び方画面（難易度はホーム画面で選ぶ） */
.screen { background: #fbf3e6; }
.screen .overlay-card { background: transparent; width: min(320px, 100%); }
.title-name { font-size: 32px !important; font-weight: bold; margin-bottom: 8px !important; white-space: nowrap; }
.title-name + .menu-buttons { margin-top: 28px; }
.home-modes { margin: 6px 0 0; }
.screen-title { font-size: 24px !important; font-weight: bold; }
.menu-buttons { display: flex; flex-direction: column; gap: 14px; }
.btn-big { font-size: 20px; padding: 14px 0; width: 100%; }
.option-group { margin-bottom: 28px; text-align: left; }
.option-label { font-size: 15px; margin-bottom: 8px; }
.modes { display: flex; gap: 8px; }
.mode-choice {
  flex: 1;
  font: inherit;
  font-size: 15px;
  padding: 12px 2px;
  white-space: nowrap;
  border-radius: 12px;
  border: 3px solid transparent;
  background: #eadfd2;
  color: #6b5a4c;
}
.mode-choice.selected { color: #fff; border-color: #4a3a30; }
.mode-easy.selected { background: #7cb97a; }
.mode-normal.selected { background: #e0884a; }
.mode-hard.selected { background: #c95a5a; }
.mode-choice small { display: block; font-size: 12px; opacity: 0.85; }
.howto-card { width: min(400px, 100%) !important; text-align: left; }
.howto-card .screen-title { text-align: center; }
.howto-list { margin: 0 0 16px; padding-left: 1.4em; font-size: 15px; line-height: 1.6; }
.howto-list li { margin-bottom: 8px; }
.howto-tip { font-size: 14px !important; margin: 0 0 10px !important; opacity: 0.85; }
.howto-card .btn-big { margin-top: 12px; }