/* 全ゲーム共通のデザイン: 色・文字・ボタン・パネル */
:root {
  --ink: #2b2d42;
  --ink-soft: #5c5f77;
  --paper: #fffaf0;
  --paper-2: #fff1d6;
  --line: #2b2d42;
  --primary: #ff6b6b;
  --primary-dark: #d94b4b;
  --secondary: #2ec4b6;
  --secondary-dark: #1f9a8f;
  --accent: #ffd166;
  --good: #3bb273;
  --danger: #ef476f;
  --radius: 18px;
  --shadow: 0 5px 0 var(--line);
  --font: 'M PLUS Rounded 1c', 'Hiragino Maru Gothic ProN', 'Hiragino Sans', 'Yu Gothic', 'Meiryo', sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  -webkit-tap-highlight-color: transparent;
}

button {
  font-family: inherit;
  touch-action: manipulation; /* ダブルタップでの拡大を防ぐ */
}

/* ---------- スマホ縦画面のゲーム枠 ----------
   スマホでは画面いっぱい、PCでは中央に縦長の枠として表示する。
   中の要素は cqw / cqh（枠の幅・高さに対する%）でサイズを決められる。 */
.app {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  margin: 0 auto;
  overflow: hidden;
  container-type: size;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}
@media (min-aspect-ratio: 2/3) {
  .app {
    width: min(100vw, calc(100dvh * 0.5));
    box-shadow: 0 0 0 4px var(--line), 0 24px 60px rgba(0, 0, 0, 0.35);
  }
}
body.app-body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 209, 102, 0.25) 0, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(46, 196, 182, 0.25) 0, transparent 40%),
    #3a3d56;
}

/* スマホを横にしたときの案内（縦専用） */
.rotate-notice {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  place-items: center;
  align-content: center;
  gap: 8px;
  background: var(--paper);
  text-align: center;
  font-weight: 900;
  font-size: 20px;
}
.rotate-notice .icon {
  font-size: 56px;
  animation: rotate-hint 1.6s ease-in-out infinite;
}
@keyframes rotate-hint {
  0%, 30% { transform: rotate(-90deg); }
  60%, 100% { transform: rotate(0deg); }
}
@media (orientation: landscape) and (pointer: coarse) {
  .rotate-notice {
    display: grid;
  }
}

.panel {
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 6px 0 var(--line);
  padding: 24px;
}

.btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  width: 100%;
  min-height: 52px;
  padding: 12px 18px;
  border: 3px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.08s ease, box-shadow 0.08s ease, filter 0.15s;
  touch-action: manipulation;
  text-decoration: none;
}
.btn small {
  font-size: 12px;
  font-weight: 500;
  opacity: 0.85;
}
.btn:hover {
  filter: brightness(1.04);
}
.btn:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--line);
}
.btn:focus-visible {
  outline: 3px dashed var(--secondary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-secondary {
  background: var(--secondary);
  color: #fff;
}
.btn-accent {
  background: var(--accent);
}
.btn-ghost {
  background: transparent;
  box-shadow: none;
  border-style: dashed;
}
.btn-ghost:active {
  transform: none;
  box-shadow: none;
}

.link {
  background: none;
  border: none;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  padding: 6px 4px;
}
.link:hover {
  color: var(--ink);
  text-decoration: underline;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  border: 2px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  background: var(--accent);
}