@import url("https://fonts.googleapis.com/css2?family=DotGothic16&display=swap");

:root {
  --bg-deep: #14101e;
  --bg-panel: #241a33;
  --bg-panel-light: #342547;
  --border-dark: #0d0a15;
  --gold: #ffc93c;
  --gold-dark: #b8890a;
  --parchment: #f2e4c4;
  --parchment-dark: #d8c299;
  --ink: #2b2033;
  --ink-soft: #cbb8e8;
  --hp-red: #ff3b3b;
  --hp-green: #4cbf6d;
  --hero-blue: #3fa8f5;
  --add: #ff6b6b;
  --sub: #3fa8f5;
  --mul: #9269f0;
  --div: #4cbf6d;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: "Hiragino Maru Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg-deep);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(146, 105, 240, 0.18), transparent 40%),
    radial-gradient(circle at 85% 30%, rgba(255, 201, 60, 0.10), transparent 35%);
  color: var(--parchment);
}

.pixel-font { font-family: "DotGothic16", "Hiragino Maru Gothic ProN", sans-serif; letter-spacing: 0.02em; }

button { font-family: inherit; cursor: pointer; }
.icon { width: 1em; height: 1em; stroke: currentColor; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; vertical-align: -0.15em; }
.sprite { display: inline-block; image-rendering: pixelated; }
.sprite svg { display: block; width: 100%; height: 100%; }

/* ---------- ヘッダー ---------- */

.app-header {
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-deep) 100%);
  border-bottom: 3px solid var(--border-dark);
  box-shadow: 0 3px 0 rgba(255,201,60,0.15);
  color: var(--parchment);
  padding: 10px 14px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.app-header h1 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--gold);
  text-shadow: 1px 1px 0 var(--border-dark);
}

.streak-pill {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-panel-light);
  border: 2px solid var(--border-dark);
  padding: 4px 9px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: bold;
  color: var(--gold);
  white-space: nowrap;
}

.streak-pill .icon { color: #ff9d3c; }

.tab-nav {
  display: flex;
  gap: 6px;
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 7px 4px;
  border: 2px solid var(--border-dark);
  border-radius: 4px;
  background: var(--bg-panel);
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: bold;
}

.tab-btn .icon { width: 18px; height: 18px; }

.tab-btn.active {
  background: var(--gold);
  color: var(--border-dark);
  border-color: var(--gold-dark);
}

main#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 14px;
  padding-bottom: 60px;
}

.screen { display: none; }
.screen.active { display: block; }

h2 { font-size: 1.05rem; margin: 4px 0 12px; color: var(--gold); }
h2 .icon { width: 18px; height: 18px; vertical-align: -3px; margin-right: 4px; }

/* 汎用パネル（RPGダイアログ風） */
.rpg-panel {
  background: var(--bg-panel);
  border: 3px solid var(--border-dark);
  border-radius: 6px;
  box-shadow: inset 0 0 0 2px rgba(255,201,60,0.15), 0 3px 0 var(--border-dark);
  padding: 14px;
}

.hidden { display: none !important; }

button.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.primary-btn {
  width: 100%;
  padding: 14px;
  font-size: 1.05rem;
  font-weight: bold;
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-dark) 100%);
  color: var(--border-dark);
  box-shadow: 0 4px 0 var(--border-dark);
}

.primary-btn .icon { width: 20px; height: 20px; }
.primary-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--border-dark); }
.primary-btn:disabled { opacity: 0.55; }

.secondary-btn {
  width: 100%;
  padding: 12px;
  margin-top: 10px;
  font-size: 0.95rem;
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  background: var(--bg-panel-light);
  color: var(--parchment);
  box-shadow: 0 3px 0 var(--border-dark);
}

.secondary-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--border-dark); }
.secondary-btn .icon { width: 18px; height: 18px; }

/* ---------- ホーム：ダンジョン選択 ---------- */

.op-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 14px;
}

.op-card {
  aspect-ratio: 1.5 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  color: #fff;
  box-shadow: 0 4px 0 var(--border-dark);
  font-weight: bold;
  position: relative;
  overflow: hidden;
}

.op-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.12), transparent 60%);
}

.op-card .op-symbol { font-size: 1.9rem; line-height: 1; text-shadow: 1px 1px 0 rgba(0,0,0,0.35); }
.op-card .op-label { font-size: 0.82rem; }
.op-card .op-progress { font-size: 0.68rem; opacity: 0.85; }

.op-card[data-op="add"] { background: var(--add); }
.op-card[data-op="sub"] { background: var(--sub); }
.op-card[data-op="mul"] { background: var(--mul); }
.op-card[data-op="div"] { background: var(--div); }

.op-card.selected { outline: 3px solid var(--gold); outline-offset: 1px; }

/* ---------- 冒険マップ ---------- */

.map-wrap { margin-top: 6px; }

.map-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  margin: 0 0 10px;
  color: var(--gold);
}

.map-path {
  position: relative;
  padding: 10px 0 4px;
}

.map-node-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  position: relative;
}

.map-node-row:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 27px;
  top: 100%;
  width: 4px;
  height: 14px;
  background: repeating-linear-gradient(to bottom, var(--gold-dark) 0 4px, transparent 4px 8px);
}

.map-node-row.offset-right { flex-direction: row; padding-left: 0; }
.map-node-row.offset-right .map-node-btn { margin-right: auto; }
.map-node-row.offset-left { flex-direction: row-reverse; }
.map-node-row.offset-left .map-node-btn { margin-left: auto; }
.map-node-row.offset-left::after { left: auto; right: 27px; }

.map-node-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  background: var(--bg-panel-light);
  padding: 6px 12px 6px 6px;
  min-width: 168px;
}

.map-node-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--bg-deep);
  border: 2px solid var(--border-dark);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
}

.map-node-icon.kind-boss { background: radial-gradient(circle, rgba(255,59,59,0.35), transparent 70%); border-color: var(--hp-red); }
.map-node-icon.kind-midboss { background: radial-gradient(circle, rgba(255,201,60,0.3), transparent 70%); border-color: var(--gold); }

.map-node-text { text-align: left; }
.map-node-label { font-size: 0.85rem; font-weight: bold; color: var(--parchment); }
.map-node-sub { font-size: 0.68rem; color: var(--ink-soft); }

.map-node-btn.current { border-color: var(--gold); box-shadow: 0 0 0 2px rgba(255,201,60,0.4); }
.map-node-btn.cleared { opacity: 0.85; }
.map-node-btn.cleared .map-node-icon { filter: grayscale(0.4); }
.map-node-btn.locked { opacity: 0.4; pointer-events: none; }

.map-node-hero {
  position: absolute;
  width: 26px;
  height: 26px;
  left: 15px;
  top: -6px;
  animation: hero-bob 1.4s ease-in-out infinite;
}

.map-node-row.offset-left .map-node-hero { left: auto; right: 15px; }

@keyframes hero-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.map-clear-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 18px;
  height: 18px;
  background: var(--hp-green);
  border: 2px solid var(--border-dark);
  border-radius: 50%;
  color: #fff;
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- バトル画面 ---------- */

.battle-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 10px;
  color: var(--ink-soft);
}

.enemy-stage {
  text-align: center;
  margin-bottom: 10px;
}

.enemy-sprite-wrap { width: 96px; height: 96px; margin: 0 auto 8px; }
.enemy-sprite-wrap.boss { width: 128px; height: 128px; }
.enemy-sprite-wrap.shake { animation: enemy-shake 0.4s ease; }

@keyframes enemy-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px) rotate(-3deg); }
  75% { transform: translateX(6px) rotate(3deg); }
}

.enemy-name { font-size: 0.85rem; color: var(--gold); margin-bottom: 4px; }

.hp-bar-track {
  width: 100%;
  height: 14px;
  background: var(--bg-deep);
  border: 2px solid var(--border-dark);
  border-radius: 4px;
  overflow: hidden;
}

.hp-bar-fill {
  height: 100%;
  background: linear-gradient(180deg, #ff6b6b, var(--hp-red));
  transition: width 0.35s ease;
}

.problem-box {
  background: var(--bg-panel);
  border: 3px solid var(--border-dark);
  border-radius: 10px;
  padding: 24px 14px;
  text-align: center;
  box-shadow: inset 0 0 0 2px rgba(255,201,60,0.12);
}

.problem-text {
  font-size: 2.1rem;
  font-weight: bold;
  margin-bottom: 16px;
  color: var(--parchment);
  word-break: break-word;
}

.answer-input {
  width: 60%;
  font-size: 1.8rem;
  text-align: center;
  padding: 8px;
  border: 3px solid var(--border-dark);
  border-radius: 6px;
  background: var(--parchment);
  color: var(--ink);
}

.answer-input:focus { border-color: var(--gold); outline: none; }

.feedback {
  text-align: center;
  font-size: 1.2rem;
  font-weight: bold;
  min-height: 2rem;
  margin: 10px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.feedback .icon { width: 22px; height: 22px; }
.feedback.correct { color: var(--hp-green); }
.feedback.wrong { color: var(--hp-red); }

/* ---------- 対戦前の準備画面 ---------- */

#battle-ready {
  text-align: center;
  padding-top: 8px;
}

#battle-ready .enemy-sprite-wrap { width: 120px; height: 120px; }

.ready-line {
  color: var(--parchment);
  font-size: 1rem;
  margin: 4px 0 16px;
}

.target-time-box {
  background: var(--bg-panel);
  border: 2px solid var(--border-dark);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 18px;
}

.target-time-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 3px 0;
}

.target-time-row.great { color: var(--gold); font-weight: bold; }

/* ---------- タイマー・キーパッド ---------- */

.battle-timer {
  font-weight: bold;
  color: var(--gold);
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 14px 0;
}

.key-btn {
  aspect-ratio: 1.4 / 1;
  font-size: 1.4rem;
  font-weight: bold;
  border: 2px solid var(--border-dark);
  border-radius: 8px;
  background: var(--bg-panel-light);
  color: var(--parchment);
  box-shadow: 0 3px 0 var(--border-dark);
}

.key-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--border-dark); }
.key-btn.key-blank { visibility: hidden; box-shadow: none; border: none; }
.key-btn.key-back { background: var(--bg-deep); color: var(--gold); font-size: 1.2rem; }

/* ---------- 勝利／けっか画面 ---------- */

.result-stage {
  text-align: center;
  margin-bottom: 10px;
}

.result-sprite-wrap { width: 110px; height: 110px; margin: 0 auto 6px; }

.result-title { font-size: 1.15rem; color: var(--gold); margin-bottom: 4px; }

.result-stars {
  text-align: center;
  font-size: 1.6rem;
  color: var(--gold);
  letter-spacing: 3px;
  margin: 4px 0 8px;
}

.result-summary {
  text-align: center;
  font-size: 0.95rem;
  margin-bottom: 4px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.result-time {
  text-align: center;
  font-size: 0.9rem;
  font-weight: bold;
  color: var(--gold);
  margin-bottom: 12px;
}

.loot-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
}

.loot-icon { width: 40px; height: 40px; }
.loot-text { font-size: 0.85rem; color: var(--parchment); text-align: left; }
.loot-text b { color: var(--gold); }

.result-mistakes {
  background: var(--bg-panel-light);
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: 0.85rem;
}

.result-mistakes .mistake-row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid var(--border-dark);
  color: var(--ink-soft);
}

/* ---------- かずのせかい ---------- */

.concept-desc { font-size: 0.9rem; color: var(--ink-soft); }

.concept-controls label { display: block; font-size: 0.9rem; margin-top: 10px; color: var(--parchment); }
.concept-controls input[type="range"] { width: 100%; accent-color: var(--gold); }

.concept-visual {
  min-height: 90px;
  background: var(--bg-panel);
  border: 2px solid var(--border-dark);
  border-radius: 8px;
  padding: 12px;
  margin: 14px 0;
  font-size: 1.5rem;
  line-height: 1.4;
}

.concept-equation { text-align: center; font-size: 1.6rem; font-weight: bold; color: var(--gold); }

/* ---------- せいせき ---------- */

.streak-box {
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-dark) 100%);
  border: 2px solid var(--border-dark);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
  font-size: 0.95rem;
  font-weight: bold;
  color: var(--border-dark);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.stats-list { display: flex; flex-direction: column; gap: 8px; }

.stats-card {
  background: var(--bg-panel);
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  padding: 10px 14px;
  border-left: 6px solid var(--gold);
}

.stats-card[data-op="add"] { border-left-color: var(--add); }
.stats-card[data-op="sub"] { border-left-color: var(--sub); }
.stats-card[data-op="mul"] { border-left-color: var(--mul); }
.stats-card[data-op="div"] { border-left-color: var(--div); }

.stats-card .stats-title { font-weight: bold; margin-bottom: 5px; color: var(--parchment); }
.stats-card .stats-row { display: flex; justify-content: space-between; font-size: 0.85rem; color: var(--ink-soft); }

.stats-card .warn-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
  background: #4a2e0a;
  color: #ffcf7a;
  font-size: 0.72rem;
  font-weight: bold;
  padding: 3px 8px;
  border-radius: 999px;
}

.stats-card .warn-badge .icon { width: 13px; height: 13px; }

.stats-empty { text-align: center; color: var(--ink-soft); padding: 20px 8px; }

.inventory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 8px;
}

.inventory-slot {
  aspect-ratio: 1;
  background: var(--bg-panel);
  border: 2px solid var(--border-dark);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6px;
}

.inventory-slot .sprite { width: 32px; height: 32px; }
.inventory-slot .inventory-count { font-size: 0.68rem; color: var(--gold); margin-top: 2px; }
.inventory-slot.empty { opacity: 0.25; }

/* ---------- 勝利演出（オーバーレイ） ---------- */

.celebrate-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 6, 18, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 24px;
  text-align: center;
  animation: fade-in 0.25s ease;
}

.celebrate-overlay.hidden { display: none; }

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

.celebrate-sprite-wrap { width: 140px; height: 140px; animation: celebrate-pop 0.6s ease; }

@keyframes celebrate-pop {
  0% { transform: scale(0.4) rotate(-8deg); opacity: 0; }
  60% { transform: scale(1.1) rotate(4deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); }
}

.celebrate-title { color: var(--gold); font-size: 1.4rem; font-weight: bold; margin: 12px 0 4px; }
.celebrate-sub { color: var(--parchment); opacity: 0.9; margin-bottom: 18px; font-size: 0.9rem; }

.confetti-field { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.confetti-piece { position: absolute; top: -10%; width: 8px; height: 8px; animation: confetti-fall linear forwards; }

@keyframes confetti-fall {
  to { transform: translateY(120vh) rotate(360deg); opacity: 0.3; }
}