/* ===== リセット & 基本 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0a0a0a;
  --fg: #f0f0f0;
  --muted: #666;
  --border: #333;
  --font-main: 'Noto Sans JP', 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --font-mono: 'Noto Sans Mono CJK JP', 'Courier New', monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-main);
  font-size: clamp(15px, 4vw, 18px);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ===== 画面共通 ===== */
.screen {
  min-height: 100%;
  min-height: 100dvh;
}

/* ===== タイトル画面 ===== */
#title-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: env(safe-area-inset-top, 16px) 16px env(safe-area-inset-bottom, 16px);
  min-height: 100dvh;
}

.title-content {
  width: 100%;
  max-width: 480px;
  text-align: center;
  position: relative;
}

.title-meteor {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #888, #1a1a1a 60%, #0a0a0a);
  box-shadow: -8px 8px 24px #444, 0 0 40px #333;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.title-main {
  font-size: clamp(22px, 6vw, 32px);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.title-sub {
  color: var(--muted);
  font-size: clamp(12px, 3vw, 14px);
  margin-bottom: 40px;
  font-family: var(--font-mono);
}

.title-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.title-btn {
  display: block;
  width: 100%;
  max-width: 280px;
  padding: 16px 24px;
  border: 1px solid var(--muted);
  font-size: clamp(14px, 3.5vw, 16px);
  letter-spacing: 0.1em;
  transition: background 0.2s, color 0.2s;
  min-height: 56px;
}

.title-btn:hover, .title-btn:active {
  background: var(--fg);
  color: var(--bg);
}

.endings-list {
  margin-top: 40px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.version-display {
  color: var(--muted);
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  margin-top: 24px;
  margin-bottom: 0;
}

.endings-label {
  color: var(--muted);
  font-size: 12px;
  font-family: var(--font-mono);
  margin-bottom: 12px;
  letter-spacing: 0.1em;
}

#endings-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.ending-badge {
  font-size: 11px;
  font-family: var(--font-mono);
  border: 1px solid var(--muted);
  padding: 4px 8px;
  color: var(--muted);
}

/* ===== ゲーム画面 ===== */
#game-screen {
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
  height: 100dvh;
  overflow: hidden;
  position: relative;
}

/* ヘッダー */
#game-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: calc(env(safe-area-inset-top, 8px) + 8px) 16px 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

#steps-display {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: clamp(13px, 3.5vw, 15px);
}

.meteor-icon {
  font-size: 18px;
}

#steps-count {
  font-weight: 700;
  min-width: 2.5ch;
  text-align: right;
}

.steps-slash, .steps-max {
  color: var(--muted);
}

#steps-bar {
  flex: 1;
  height: 6px;
  background: var(--border);
  overflow: hidden;
}

#steps-fill {
  height: 100%;
  background: var(--fg);
  transition: width 0.4s ease;
  width: 100%;
}

.mute-btn {
  font-size: 20px;
  padding: 4px 8px;
  line-height: 1;
  opacity: 0.7;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mute-btn:hover { opacity: 1; }
.mute-btn.muted { opacity: 0.3; }

.map-btn {
  font-size: 20px;
  padding: 4px 8px;
  line-height: 1;
  opacity: 0.7;
  min-height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg);
  background: transparent;
  border: none;
  cursor: pointer;
}

.map-btn:hover { opacity: 1; }

/* 隕石の影 */
.meteor-shadow {
  position: fixed;
  top: -60px;
  right: -60px;
  width: 120px;
  height: 120px;
  pointer-events: none;
  z-index: 200;
  transition: transform 0.5s ease, opacity 0.5s ease;
  opacity: 0.15;
  transform-origin: 65% 35%;
  filter: drop-shadow(0 0 12px rgba(0,0,0,0.7));
}

.meteor-circle {
  fill: url(#meteorGrad);
}

/* ノイズオーバーレイ */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 150;
  opacity: 0;
  transition: opacity 1s ease;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.08'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 200px 200px;
}

.noise-overlay.active {
  opacity: 1;
}

/* シーンエリア */
#scene-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.scene-fade {
  flex: 55 55 0;
  overflow-y: auto;
  min-height: 0;
  padding: 20px 16px 12px;
  transition: opacity 0.2s ease;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.scene-fade::-webkit-scrollbar { width: 4px; }
.scene-fade::-webkit-scrollbar-thumb { background: var(--border); }

.scene-fade.fading {
  opacity: 0;
}

.scene-name {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(11px, 3vw, 13px);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 2px 8px;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.scene-text {
  font-size: clamp(15px, 4vw, 17px);
  line-height: 1.8;
  white-space: pre-wrap;
}

/* 選択肢エリア */
.choices-area {
  flex: 45 45 0;
  overflow-y: auto;
  min-height: 0;
  padding: 8px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--border);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.choices-area::-webkit-scrollbar { width: 4px; }
.choices-area::-webkit-scrollbar-thumb { background: var(--border); }

.choice-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-align: left;
  font-size: clamp(14px, 3.8vw, 16px);
  line-height: 1.4;
  transition: background 0.15s, color 0.15s;
  position: relative;
  overflow: hidden;
}

.choice-btn::before {
  content: '▸';
  color: var(--muted);
  flex-shrink: 0;
  margin-right: 4px;
}

.choice-btn:hover, .choice-btn:active {
  background: var(--fg);
  color: var(--bg);
}

.choice-btn:hover::before, .choice-btn:active::before {
  color: var(--bg);
}

.choice-label {
  flex: 1;
}

.choice-cost {
  font-family: var(--font-mono);
  font-size: clamp(11px, 3vw, 12px);
  color: var(--muted);
  flex-shrink: 0;
  white-space: nowrap;
}

.choice-btn:hover .choice-cost,
.choice-btn:active .choice-cost {
  color: var(--bg);
  opacity: 0.6;
}

.choice-btn:disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* 移動選択肢: 破線ボーダー + 矢印 */
.choice-btn.choice-move {
  border-style: dashed;
}

.choice-btn.choice-move::before {
  content: '→';
}

/* 「次へ」ボタン: 中央寄せ + 別アイコン */
.choice-btn.next-btn {
  justify-content: center;
}

.choice-btn.next-btn::before {
  content: '»';
}

.choice-btn.next-btn .choice-label {
  flex: 0 0 auto;
}

/* アイテムエリア */
.items-area {
  flex-shrink: 0;
  border-top: 1px solid var(--border);
  padding: 8px 16px calc(env(safe-area-inset-bottom, 0px) + 8px);
  min-height: 44px;
}

.items-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.items-scroll::-webkit-scrollbar { display: none; }

.item-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: clamp(11px, 3vw, 12px);
  border: 1px solid var(--muted);
  padding: 4px 10px;
  white-space: nowrap;
  color: var(--muted);
  flex-shrink: 0;
  background: transparent;
  cursor: pointer;
  min-height: 32px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.item-chip:hover, .item-chip:active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.items-empty {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* ===== エンディング画面 ===== */
#ending-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px env(safe-area-inset-bottom, 24px);
  padding-top: calc(env(safe-area-inset-top, 0px) + 24px);
  min-height: 100dvh;
}

.ending-content {
  max-width: 480px;
  width: 100%;
  animation: fadeIn 0.8s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.ending-category {
  font-family: var(--font-mono);
  font-size: clamp(10px, 3vw, 12px);
  color: var(--muted);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.ending-title {
  font-size: clamp(20px, 5.5vw, 28px);
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
}

.ending-text {
  font-size: clamp(14px, 3.8vw, 16px);
  line-height: 1.9;
  white-space: pre-wrap;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-bottom: 32px;
}

.ending-actions {
  display: flex;
  justify-content: center;
}

/* ===== アニメーション演出 ===== */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

@keyframes massiveQuake {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-7px, 4px); }
  20% { transform: translate(9px, -6px); }
  30% { transform: translate(-11px, 8px); }
  40% { transform: translate(6px, 10px); }
  50% { transform: translate(-9px, -7px); }
  60% { transform: translate(12px, 3px); }
  70% { transform: translate(-5px, -10px); }
  80% { transform: translate(7px, 8px); }
  90% { transform: translate(-9px, -3px); }
}

.steps-warning {
  animation: blink 1.2s ease-in-out infinite;
}

.game-quake {
  animation: massiveQuake 0.18s linear infinite;
}

/* 隕石落下演出 — 多段階で巨大感を出す */
@keyframes meteorApproach {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.18;
    filter: drop-shadow(0 0 12px rgba(0,0,0,0.7));
  }
  20% {
    transform: translate(-3vw, 3vh) scale(2.2);
    opacity: 0.45;
    filter: drop-shadow(0 0 28px rgba(0,0,0,0.85));
  }
  55% {
    transform: translate(-10vw, 12vh) scale(6);
    opacity: 0.78;
    filter: drop-shadow(0 0 44px rgba(255,255,255,0.15));
  }
  78% {
    transform: translate(-22vw, 26vh) scale(14);
    opacity: 0.95;
    filter: drop-shadow(0 0 80px rgba(255,255,255,0.35));
  }
  92% {
    transform: translate(-35vw, 40vh) scale(28);
    opacity: 1;
    filter: drop-shadow(0 0 140px rgba(255,255,255,0.6));
  }
  100% {
    transform: translate(-45vw, 55vh) scale(48);
    opacity: 1;
    filter: drop-shadow(0 0 200px rgba(255,255,255,0.9));
  }
}

.meteor-falling {
  animation: meteorApproach 3.4s cubic-bezier(0.55, 0.0, 0.85, 0.4) forwards;
}

/* 衝突フラッシュ — 白→黒に焼き付ける */
.impact-flash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 280;
  background: transparent;
  opacity: 0;
}

@keyframes impactFlash {
  0%   { background: transparent; opacity: 0; }
  2%   { background: #ffffff; opacity: 1; }
  35%  { background: #ffffff; opacity: 1; }
  55%  { background: #f0f0f0; opacity: 0.9; }
  80%  { background: #000000; opacity: 1; }
  100% { background: #000000; opacity: 1; }
}

.impact-flash.firing {
  animation: impactFlash 1.2s ease-out forwards;
}

/* 場面遷移フラッシュ */
@keyframes flashWhite {
  0% { background: transparent; }
  30% { background: rgba(240,240,240,0.12); }
  100% { background: transparent; }
}

.scene-flash {
  animation: flashWhite 0.4s ease;
}

/* マップオーバーレイ */
.map-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.92);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.map-overlay[hidden] {
  display: none;
}

.map-modal {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
  border: 1px solid var(--border);
  position: relative;
  background: var(--bg);
}

.map-title {
  position: absolute;
  top: 8px;
  left: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  z-index: 1;
}

.map-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.map-svg line {
  stroke: var(--border);
  stroke-width: 0.4;
}

.map-svg circle.node {
  fill: var(--fg);
  stroke: var(--fg);
  stroke-width: 0.3;
}

.map-svg circle.node-unvisited {
  fill: none;
  stroke: var(--muted);
  stroke-dasharray: 0.8 0.8;
}

.map-svg circle.node-current {
  fill: none;
  stroke: var(--fg);
  stroke-width: 0.6;
  animation: mapPulse 1.6s ease-in-out infinite;
}

@keyframes mapPulse {
  0%, 100% { opacity: 1; r: 4.5; }
  50%      { opacity: 0.4; r: 6; }
}

.map-svg text {
  font-size: 3.2px;
  fill: var(--fg);
  text-anchor: middle;
  font-family: var(--font-mono);
  pointer-events: none;
}

.map-svg text.label-unvisited {
  fill: var(--muted);
}

.map-close {
  position: absolute;
  top: 4px;
  right: 4px;
  font-size: 22px;
  line-height: 1;
  min-height: 40px;
  min-width: 40px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  cursor: pointer;
  z-index: 2;
}

.map-close:hover {
  background: var(--fg);
  color: var(--bg);
}

/* アイテム詳細モーダル */
.item-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.92);
  z-index: 320;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.item-overlay[hidden] {
  display: none;
}

.item-modal {
  width: 100%;
  max-width: 360px;
  border: 1px solid var(--border);
  background: var(--bg);
  padding: 28px 20px 20px;
  position: relative;
  text-align: center;
  animation: fadeIn 0.25s ease;
}

.item-close {
  position: absolute;
  top: 4px;
  right: 4px;
  font-size: 22px;
  line-height: 1;
  min-height: 40px;
  min-width: 40px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  cursor: pointer;
}

.item-close:hover {
  background: var(--fg);
  color: var(--bg);
}

.item-modal-icon {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 12px;
}

.item-modal-name {
  font-size: clamp(15px, 4vw, 17px);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.item-modal-desc {
  font-size: clamp(13px, 3.4vw, 14px);
  line-height: 1.8;
  color: var(--fg);
  white-space: pre-wrap;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  text-align: left;
}

/* アイテム取得トースト */
.item-toast-area {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  z-index: 250;
  padding: 0 16px;
}

.item-toast {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border: 1px solid var(--fg);
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: clamp(12px, 3.2vw, 14px);
  color: var(--fg);
  max-width: 360px;
  box-shadow: 0 0 0 1px var(--bg), 0 4px 16px rgba(0, 0, 0, 0.6);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.item-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.item-toast.hide {
  opacity: 0;
  transform: translateY(-8px);
}

.item-toast-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--bg);
  background: var(--fg);
  padding: 2px 6px;
}

.item-toast-body {
  white-space: nowrap;
}

/* エンディング badge を tap 可能に */
button.ending-badge {
  background: transparent;
  cursor: pointer;
  font-family: var(--font-mono);
  letter-spacing: 0;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

button.ending-badge:hover, button.ending-badge:active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}