/* ============================================================
   けいさんカード — 絵本 × さんすうノート(方眼紙)テーマ
   ============================================================ */

:root {
  --paper: #fff6e9;
  --ink: #453a2f;
  --grid: rgba(69, 58, 47, 0.08);
  --white: #fffdf8;
  --add: #ff8a5c;
  --add-soft: #ffe3d6;
  --sub: #62b6e8;
  --sub-soft: #ddf0fc;
  --sun: #ffd34e;
  --maru: #ff5252;
  --batsu: #5a8fd0;
  --shadow: 0 5px 0 var(--ink);
  --font-ui: 'Zen Maru Gothic', 'Hiragino Maru Gothic ProN', sans-serif;
  --font-num: 'M PLUS Rounded 1c', 'Zen Maru Gothic', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* hidden属性は、要素側でdisplayを明示指定していても常に優先する
   (CSSの仕様上、同じ詳細度なら後勝ちになりhidden属性が無視されてしまうため) */
[hidden] {
  display: none !important;
}

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-ui);
  font-weight: 700;
  color: var(--ink);
  background-color: var(--paper);
  /* さんすうノートの方眼 */
  background-image:
    linear-gradient(var(--grid) 1.5px, transparent 1.5px),
    linear-gradient(90deg, var(--grid) 1.5px, transparent 1.5px);
  background-size: 28px 28px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  overflow: hidden;
}

.num {
  font-family: var(--font-num);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

#confetti {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
}

main {
  height: 100dvh;
  max-width: 460px;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
}

/* ---------- 画面切替 ---------- */
.screen {
  display: none;
  height: 100%;
  flex-direction: column;
}
.screen.active {
  display: flex;
  animation: screen-in 0.25s ease-out;
}
@keyframes screen-in {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- ステッカー(共通部品) ---------- */
.sticker {
  background: var(--white);
  border: 3px solid var(--ink);
  border-radius: 22px;
  box-shadow: var(--shadow);
  color: var(--ink);
  font-family: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}
button.sticker:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 var(--ink);
}

/* ---------- ホーム ---------- */
#screen-home {
  justify-content: center;
  gap: 22px;
  text-align: center;
}

.title {
  font-size: clamp(2.2rem, 11vw, 3rem);
  letter-spacing: 0.04em;
  line-height: 1.1;
}
.title span {
  display: inline-block;
  animation: bob 2.4s ease-in-out infinite;
}
.title span:nth-child(1) { color: var(--add);  animation-delay: 0s;    }
.title span:nth-child(2) { color: var(--sub);  animation-delay: 0.12s; }
.title span:nth-child(3) { color: #e8a33d;     animation-delay: 0.24s; }
.title span:nth-child(4) { color: #7ed957;     animation-delay: 0.36s; }
.title span:nth-child(5) { color: var(--maru); animation-delay: 0.48s; }
.title span:nth-child(6) { color: var(--sub);  animation-delay: 0.6s;  }
.title span:nth-child(7) { color: var(--add);  animation-delay: 0.72s; }
@keyframes bob {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50%      { transform: translateY(-6px) rotate(2deg); }
}

.tagline {
  font-size: 1.05rem;
  background: var(--sun);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 6px 18px;
  align-self: center;
  transform: rotate(-2deg);
  box-shadow: 0 3px 0 var(--ink);
}

.mode-buttons {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.mode-btn {
  display: grid;
  grid-template-columns: 76px 1fr;
  grid-template-rows: auto auto;
  align-items: center;
  text-align: left;
  padding: 18px 22px;
  gap: 2px 14px;
}
.mode-btn .mode-icon {
  grid-row: 1 / 3;
  font-family: var(--font-num);
  font-size: 3.2rem;
  line-height: 1;
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  color: var(--white);
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.15);
}
.mode-add .mode-icon { background: var(--add); }
.mode-sub .mode-icon { background: var(--sub); }
.mode-add { background: var(--add-soft); }
.mode-sub { background: var(--sub-soft); }
.mode-btn .mode-label { font-size: 1.7rem; }
.mode-btn .mode-best {
  font-size: 0.95rem;
  opacity: 0.75;
  font-weight: 700;
}

.link-btn {
  align-self: center;
  font-size: 1rem;
  padding: 12px 26px;
  border-radius: 999px;
}

.child-name {
  font-size: 1rem;
  opacity: 0.75;
}

.logout-btn {
  font-size: 0.85rem;
  opacity: 0.6;
  padding: 8px 20px;
  box-shadow: 0 3px 0 var(--ink);
}

/* ---------- 読み込み中 ---------- */
#screen-loading {
  background-color: var(--paper);
}

/* ---------- ログイン・サインアップ ---------- */
#screen-login,
#screen-signup {
  justify-content: center;
  align-items: center;
  gap: 22px;
  text-align: center;
}
.auth-title {
  margin-bottom: 4px;
}
.auth-form {
  width: 100%;
  max-width: 320px;
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  cursor: default;
}
.auth-heading {
  font-size: 1.4rem;
  margin-bottom: 4px;
}
.auth-input {
  font-family: inherit;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 12px 16px;
  outline: none;
}
.auth-input:focus {
  background: var(--white);
  box-shadow: 0 0 0 3px var(--sun);
}
.auth-input::placeholder {
  color: var(--ink);
  opacity: 0.4;
}
.auth-submit {
  font-size: 1.2rem;
  padding: 14px 0;
  border-radius: 999px;
  background: var(--sun);
  margin-top: 4px;
}
.auth-error {
  font-size: 0.9rem;
  color: var(--maru);
  background: var(--white);
  border: 2px solid var(--maru);
  border-radius: 12px;
  padding: 8px 12px;
}

/* ---------- プレイ ---------- */
#screen-play {
  gap: 10px;
  padding-top: 10px;
}

.play-header {
  display: flex;
  align-items: center;
  gap: 12px;
}
.quit-btn {
  font-size: 0.85rem;
  padding: 8px 14px;
  border-radius: 999px;
  box-shadow: 0 3px 0 var(--ink);
}
.progress {
  font-size: 1rem;
  opacity: 0.8;
}
.timer {
  margin-left: auto;
  font-size: 1.5rem;
  background: var(--sun);
  border: 3px solid var(--ink);
  border-radius: 14px;
  padding: 2px 12px;
  box-shadow: 0 3px 0 var(--ink);
}

.card-area {
  position: relative;
  flex: 1;
  display: grid;
  place-items: center;
  min-height: 0;
}

.card {
  width: 100%;
  padding: clamp(20px, 6vh, 48px) 12px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.35em;
  font-size: clamp(2.6rem, 15vw, 4.6rem);
  background:
    linear-gradient(var(--white), var(--white)) padding-box,
    var(--white);
  border-radius: 30px;
  cursor: default;
}
.card-answer {
  color: #c9bfae;
}

/* ○ / × / カウントダウン のオーバーレイ */
.judge {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  pointer-events: none;
  z-index: 10;
}
.judge.maru::before {
  content: '';
  width: min(46vw, 210px);
  height: min(46vw, 210px);
  border: 14px solid var(--maru);
  border-radius: 50%;
  animation: maru-pop 0.55s ease-out forwards;
  filter: drop-shadow(0 3px 0 rgba(0, 0, 0, 0.12));
}
@keyframes maru-pop {
  0%   { transform: scale(0.3); opacity: 0; }
  35%  { transform: scale(1.08); opacity: 1; }
  70%  { transform: scale(1); opacity: 1; }
  100% { transform: scale(1); opacity: 0; }
}

.judge.batsu {
  flex-direction: column;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  animation: batsu-shake 0.4s ease;
}
.batsu-mark {
  font-size: min(38vw, 170px);
  line-height: 1;
  color: var(--batsu);
  font-weight: 900;
  filter: drop-shadow(0 3px 0 rgba(0, 0, 0, 0.12));
}
.batsu-text {
  font-size: 1.4rem;
  background: var(--white);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 4px 18px;
  box-shadow: 0 3px 0 var(--ink);
}
@keyframes batsu-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  50% { transform: translateX(10px); }
  75% { transform: translateX(-6px); }
}

.judge.count {
  font-family: var(--font-num);
  font-size: min(34vw, 150px);
  color: var(--ink);
  -webkit-text-stroke: 3px var(--ink);
  text-shadow: 0 5px 0 var(--sun);
}
.judge.count.pop {
  animation: count-pop 0.6s ease-out;
}
@keyframes count-pop {
  0%  { transform: scale(0.4); opacity: 0; }
  40% { transform: scale(1.15); opacity: 1; }
  70% { transform: scale(1); }
}

.mic-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 1.6em;
  font-size: 0.95rem;
}
.mic-status { opacity: 0.75; }
.heard {
  color: var(--sub);
  font-size: 1.1rem;
}

/* すうじボタン */
.numpad {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  padding-bottom: 12px;
}
.num-btn {
  font-size: 1.5rem;
  padding: 12px 0;
  border-radius: 16px;
  box-shadow: 0 4px 0 var(--ink);
}
.num-btn:nth-child(odd) { background: #fff1de; }

/* ---------- 結果 ---------- */
#screen-result {
  justify-content: center;
  gap: 24px;
  text-align: center;
}
.result-title {
  font-size: 2.2rem;
}
.result-card {
  padding: 28px 20px;
  cursor: default;
  border-radius: 30px;
}
.result-time {
  font-size: 3.6rem;
  line-height: 1.1;
}
.newbest {
  margin-top: 8px;
  display: inline-block;
  font-size: 1.2rem;
  background: var(--sun);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 4px 18px;
  transform: rotate(-2deg);
  animation: bob 1.6s ease-in-out infinite;
}
.result-detail {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  gap: 28px;
}
.result-detail div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.result-detail dt {
  font-size: 0.9rem;
  opacity: 0.7;
}
.result-detail dd {
  font-size: 1.3rem;
}
.result-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
}
.big-btn {
  font-size: 1.5rem;
  padding: 16px 44px;
  border-radius: 999px;
  background: var(--sun);
}

/* ---------- きろく ---------- */
#screen-records {
  padding-top: 24px;
  gap: 18px;
  overflow-y: auto;
}
.records-title {
  text-align: center;
  font-size: 1.8rem;
}
#records-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.records-block {
  padding: 16px 18px;
  cursor: default;
}
.records-add10 { background: var(--add-soft); }
.records-sub10 { background: var(--sub-soft); }
.records-block h3 {
  font-size: 1.3rem;
}
.records-best {
  font-size: 1.05rem;
  margin: 4px 0 10px;
}
.records-history {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.records-history li {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 12px;
  padding: 6px 12px;
  font-size: 0.95rem;
  font-weight: 700;
}
.rec-time { margin-left: auto; }
.rec-miss { opacity: 0.7; font-size: 0.85rem; }
.rec-empty { justify-content: center; opacity: 0.6; }
#screen-records .link-btn { margin: 4px auto 20px; flex-shrink: 0; }

/* ---------- グラフ ---------- */
#screen-graph {
  padding-top: 24px;
  gap: 18px;
  align-items: center;
}
.graph-title {
  text-align: center;
  font-size: 1.8rem;
}
.graph-card {
  width: 100%;
  flex: 1;
  min-height: 0;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  cursor: default;
}
.graph-legend {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}
.graph-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
}
.graph-swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  display: inline-block;
}
.graph-canvas-wrap {
  position: relative;
  flex: 1;
  min-height: 0;
}
#graph-canvas {
  width: 100%;
  height: 100%;
  display: block;
}
.graph-tooltip {
  position: absolute;
  transform: translate(-50%, -130%);
  background: var(--ink);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 8px;
  pointer-events: none;
  white-space: nowrap;
}
.graph-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
}
#screen-graph .link-btn { margin: 4px auto 20px; flex-shrink: 0; }

/* ---------- アニメーション弱者への配慮 ---------- */
@media (prefers-reduced-motion: reduce) {
  .title span,
  .newbest {
    animation: none;
  }
}