/* =================================================================
   넌센스 OX 퀴즈 — style.css
   디자인 토큰 + 레이아웃 + 애니메이션
   레퍼런스: docs/02-design/features/nonsense-quiz-mvp.design.md §10, _refs/screenshots-description.md
   저작권 자체 인증: 퀴즈스틱맨 자산 미사용. 컬러·메커니즘 컨셉만 차용.
   ================================================================= */

/* ── DESIGN TOKENS ── */
:root {
  --bg-primary: #3a3a3a;
  --bg-card: #fff5e6;
  --bg-victory: #fdd835;
  --bg-error: #2a2a3a;

  --color-o: #29b6f6;
  --color-o-shadow: #0277bd;
  --color-x: #ef5350;
  --color-x-shadow: #c62828;

  --text-primary: #ffffff;
  --text-dark: #1a1a1a;
  --text-muted: #d0d0d0;
  --text-outline: #000000;

  --font-title: "Black Han Sans", system-ui, sans-serif;
  --font-body: "Jua", system-ui, sans-serif;

  --radius-pill: 999px;
  --radius-card: 16px;
  --radius-chip: 8px;

  --shadow-btn: 0 6px 0 rgba(0,0,0,0.25);
  --shadow-btn-active: 0 2px 0 rgba(0,0,0,0.25);

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;

  --duration-fast: 0.2s;
  --duration-normal: 0.5s;
  --duration-slow: 1s;
}

/* ── BASE RESET ── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; min-height: 100%; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  /* 가로는 잠그고 세로는 인트로가 viewport 보다 클 때만 자연 스크롤 */
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}
button { font-family: inherit; cursor: pointer; }

/* ── INTRO BG · 레트로 버블버블 톤 ── */
.view--intro {
  background:
    /* 떠다니는 거품 글로우들 */
    radial-gradient(circle at 12% 18%, rgba(255,95,162,0.18) 0, transparent 6%),
    radial-gradient(circle at 82% 14%, rgba(0,224,208,0.20) 0, transparent 6%),
    radial-gradient(circle at 26% 76%, rgba(255,240,102,0.20) 0, transparent 5%),
    radial-gradient(circle at 88% 64%, rgba(74,142,255,0.18) 0, transparent 7%),
    radial-gradient(circle at 50% 50%, rgba(106,62,161,0.18) 0, transparent 14%),
    /* 픽셀 그리드 (희미) */
    repeating-linear-gradient(0deg, transparent 0 40px, rgba(255,240,102,0.06) 40px 41px),
    repeating-linear-gradient(90deg, transparent 0 40px, rgba(0,224,208,0.05) 40px 41px),
    /* 베이스: 밤 하늘 톤 */
    radial-gradient(ellipse at top, #2b1b3a 0%, #1a1428 60%, #0d0a1a 100%);
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

/* 떠다니는 큰 거품 2개 — 8비트 글로우 */
.view--intro::before,
.view--intro::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.view--intro::before {
  top: 8%; left: 6%;
  width: 64px; height: 64px;
  background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.95), rgba(0,224,208,0.55) 40%, rgba(0,224,208,0.2) 75%, transparent 85%);
  box-shadow: 0 0 24px rgba(0,224,208,0.45);
  animation: bubble-float 6s ease-in-out infinite;
}
.view--intro::after {
  bottom: 14%; right: 6%;
  width: 88px; height: 88px;
  background: radial-gradient(circle at 32% 28%, rgba(255,255,255,0.95), rgba(255,95,162,0.55) 40%, rgba(255,95,162,0.2) 75%, transparent 85%);
  box-shadow: 0 0 28px rgba(255,95,162,0.45);
  animation: bubble-float 7.5s ease-in-out infinite reverse;
}

@keyframes bubble-float {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.85; }
  50% { transform: translate(14px, -30px) scale(1.08); opacity: 1; }
}

/* 인트로 내부 요소는 거품 위 z-index */
.view--intro > * { position: relative; z-index: 1; }

/* ── VIEW (4개 화면 공용) ── */
#app { min-height: 100vh; min-height: 100dvh; }
.view {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-3);
  gap: var(--space-3);
  text-align: center;
  position: relative;
}
/* 인트로는 컨텐츠가 viewport 초과 시 위에서 시작해 스크롤 */
.view--intro {
  justify-content: flex-start;
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  gap: var(--space-2);
}
/* 게임 화면: 사막 배경 풀스크린 */
.view--game {
  background-image: url('_refs/sprites/bg-desert.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: var(--space-2);
  gap: var(--space-2);
}
.view[hidden] { display: none; }

/* ── TITLE ── */
.title {
  font-family: var(--font-title);
  font-weight: 400;
  margin: 0;
  line-height: 1.1;
  -webkit-text-stroke: 3px var(--text-outline);
  text-shadow:
    4px 4px 0 var(--text-outline),
    -1px -1px 0 var(--text-outline);
}
.title--intro {
  font-size: clamp(32px, 9vmin, 56px);
  color: var(--color-o);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  white-space: nowrap;
  text-shadow:
    4px 4px 0 var(--text-outline),
    -1px -1px 0 var(--text-outline),
    0 0 22px rgba(0,224,208,0.55);  /* 네온 글로우 */
}
.title__line--small {
  font-size: clamp(20px, 6vmin, 36px);
  color: var(--text-primary);
}
.title--end {
  font-size: clamp(48px, 16vmin, 96px);
  color: var(--text-primary);
  position: relative;
  z-index: 2;
}
.title--error {
  font-size: clamp(24px, 7vmin, 40px);
  color: var(--text-primary);
  -webkit-text-stroke: 2px var(--text-outline);
}

/* ── CROWD (인트로 PNG 캐릭터 군중) — 버블버블 capsule ── */
.crowd {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  max-width: 360px;
  width: 100%;
  justify-items: center;
  padding: 12px 10px;
  border-radius: 22px;
  background:
    radial-gradient(ellipse at center top, rgba(0,224,208,0.14), transparent 70%),
    rgba(255,255,255,0.04);
  border: 2px solid rgba(0,224,208,0.28);
  box-shadow:
    inset 0 0 24px rgba(0,224,208,0.14),
    0 6px 22px rgba(0,0,0,0.4);
}
.crowd__char {
  width: clamp(40px, 10vmin, 58px);
  height: clamp(40px, 10vmin, 58px);
  filter: drop-shadow(0 3px 0 rgba(0,0,0,0.55));
  image-rendering: pixelated;
  animation: crowd-bob 2.4s ease-in-out infinite;
}
.crowd__char:nth-child(odd)  { animation-delay: -0.6s; }
.crowd__char:nth-child(3n)   { animation-delay: -1.2s; }
.crowd__char:nth-child(4n)   { animation-delay: -1.8s; }

.crowd__char.is-me {
  animation: crowd-bob-me 1.4s ease-in-out infinite;
  filter:
    drop-shadow(0 0 10px var(--bg-victory))
    drop-shadow(0 3px 0 rgba(0,0,0,0.55));
}

@keyframes crowd-bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-5px); }
}
@keyframes crowd-bob-me {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-9px) scale(1.07); }
}

/* ── CATEGORY PICK (v4) ── */
.category-pick {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: var(--space-2) 0;
}
.category-pick__label {
  font-family: var(--font-title);
  font-size: clamp(13px, 3.5vmin, 16px);
  color: var(--text-primary);
}
.category-pick__select {
  font-family: var(--font-body);
  font-size: clamp(13px, 3.8vmin, 16px);
  padding: 10px 14px;
  border-radius: 12px;
  border: 2px solid rgba(255,255,255,0.15);
  background: rgba(0,0,0,0.4);
  color: var(--text-primary);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23ffffff' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 32px;
  cursor: pointer;
}
.category-pick__select:focus {
  outline: 2px solid var(--bg-victory);
  outline-offset: 2px;
}
.category-pick__select option,
.category-pick__select optgroup {
  background: var(--bg-primary);
  color: var(--text-primary);
}
.category-pick__meta {
  font-size: clamp(11px, 3vmin, 13px);
  color: var(--text-muted);
  margin: 0;
  min-height: 1.4em;
  text-align: center;
}

/* ── HINT / STATUS ── */
.hint {
  font-size: clamp(14px, 4vmin, 18px);
  color: var(--text-muted);
  margin: 0;
}
.intro-status {
  font-size: clamp(12px, 3vmin, 14px);
  color: var(--text-muted);
  margin: 0;
  min-height: 1.5em;
}

/* ── BUTTONS ── */
.btn {
  font-family: var(--font-title);
  font-size: clamp(18px, 5vmin, 24px);
  border: 3px solid var(--text-outline);
  border-radius: var(--radius-pill);
  padding: var(--space-2) var(--space-4);
  min-width: 200px;
  box-shadow: var(--shadow-btn);
  transition: transform var(--duration-fast), box-shadow var(--duration-fast);
}
.btn:active:not([disabled]) {
  transform: translateY(4px);
  box-shadow: var(--shadow-btn-active);
}
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }
.btn--primary { background: var(--color-o); color: var(--text-primary); }
.btn--secondary { background: var(--bg-card); color: var(--text-dark); }

/* ── HUD (게임 화면 상단) ── */
.hud {
  width: 100%;
  display: grid;
  /* [v3] auto auto 1fr auto — pause / Q.X / ⭐K(primary, expands) / 👥N */
  grid-template-columns: auto auto 1fr auto;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: rgba(0,0,0,0.3);
  border-radius: var(--radius-card);
  font-size: clamp(14px, 3.5vmin, 18px);
}
.hud__pause {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5em;
  width: 32px;
  height: 32px;
  border-radius: 50%;
}
.hud__pause[disabled] { opacity: 0.4; cursor: default; }
.hud__progress { font-family: var(--font-title); }
/* [v3] 점수 primary (1.15em), 인원 보조 (0.9em) */
.hud__score { font-family: var(--font-title); color: var(--color-o); font-size: 1.15em; text-align: center; }
.hud__alive { font-family: var(--font-title); transition: color 0.3s; font-size: 0.9em; opacity: 0.85; }
.hud__alive.is-warning { color: var(--bg-victory); opacity: 1; }
.hud__alive.is-danger { color: var(--color-x); opacity: 1; animation: pulse-warn 0.6s ease-in-out infinite; }
@keyframes pulse-warn {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

/* ── QUESTION CARD — 긴 문제 내부 스크롤로 OX 버튼 영역 보호 ── */
.question {
  background: var(--bg-card);
  color: var(--text-dark);
  font-family: var(--font-title);
  font-size: clamp(18px, 4.5vmin, 28px);
  line-height: 1.4;
  padding: var(--space-2);
  border-radius: var(--radius-card);
  border: 3px solid var(--text-outline);
  box-shadow: var(--shadow-btn);
  min-height: 12vh;
  /* 화면의 35%만 차지하도록 상한 + 넘치면 내부 스크롤 */
  max-height: 35vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  word-break: keep-all;
  overflow-wrap: break-word;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
/* 긴 문제일 때 시각 단서 — 위/아래 fade */
.question.is-long {
  align-items: flex-start;  /* 위에서부터 읽기 */
  font-size: clamp(16px, 4vmin, 22px);  /* 살짝 작게 */
  line-height: 1.55;
  text-align: left;
  padding: var(--space-2) var(--space-3);
}

/* ── TIMER ── */
.timer {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,0,0,0.7);
  color: var(--text-primary);
  font-family: var(--font-title);
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--text-outline);
  font-size: clamp(18px, 5vmin, 28px);
  align-self: center;
}
.timer__icon { font-size: 0.85em; }
.timer__num { min-width: 1.5em; text-align: center; }
.timer.is-warning { background: rgba(239, 83, 80, 0.9); animation: timer-shake 0.4s ease-in-out infinite; }
@keyframes timer-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* ── ARENA (v2: 50인 서바이벌 — zone 분할 + 절대 위치 sprite) ── */
.arena {
  width: 100%;
  flex: 1 1 auto;
  min-height: 50vh;
  border-radius: var(--radius-card);
  border: 3px solid var(--text-outline);
  position: relative;
  overflow: hidden;
  background: rgba(0,0,0,0.25);
  box-shadow: inset 0 4px 12px rgba(0,0,0,0.3);
  contain: layout paint;
}

/* 위→아래 격자 러닝 BG */
.arena.is-running::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 8px 8px;
  animation: scroll-down 0.8s linear infinite;
  pointer-events: none;
  z-index: 0;
}
@keyframes scroll-down {
  from { background-position-y: 0; }
  to   { background-position-y: 8px; }
}

/* 좌·우 zone overlay (활성화는 .is-active로 토글) */
.arena__zone {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  pointer-events: none;
  transition: background var(--duration-fast), opacity var(--duration-fast);
  z-index: 1;
  opacity: 0;
}
.arena__zone--o { left: 0; background: rgba(41, 182, 246, 0.10); }
.arena__zone--x { right: 0; background: rgba(239, 83, 80, 0.10); }
.arena.is-zoning .arena__zone { opacity: 1; }
.arena__zone.is-correct-flash { background-color: rgba(124, 179, 66, 0.30); animation: zone-flash 0.3s ease-in-out 3; }
.arena__zone.is-wrong-darken { background: rgba(0, 0, 0, 0.45); }
@keyframes zone-flash {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* 가운데 점선 */
.arena__divider {
  position: absolute;
  left: 50%;
  top: 4%;
  bottom: 4%;
  width: 0;
  border-left: 2px dashed rgba(255,255,255,0.45);
  transform: translateX(-1px);
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity var(--duration-fast);
}
.arena.is-zoning .arena__divider { opacity: 1; }

/* zone 라벨 (큰 O / X 워터마크) */
.arena__zone-label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-title);
  font-size: clamp(80px, 28vmin, 180px);
  -webkit-text-stroke: 4px var(--text-outline);
  text-shadow: 5px 5px 0 var(--text-outline);
  opacity: 0;
  pointer-events: none;
  z-index: 1;
  transition: opacity var(--duration-fast);
}
.arena__zone-label--o { left: 8%; color: var(--color-o); }
.arena__zone-label--x { right: 8%; color: var(--color-x); }
.arena.is-zoning .arena__zone-label { opacity: 0.18; }

/* sprites container — 절대 위치 sprite들의 부모 (좌표 100% 기준) */
.arena__sprites {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

/* === OX BUTTONS (arena 밖, 별도 row) === */
.ox-buttons {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  flex-shrink: 0;
  /* 모바일에서 viewport 하단 고정 — 문제가 길어도 항상 도달 가능 */
  position: sticky;
  bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-2));
  z-index: 5;
  /* 어두운 배경에 자연스럽게 — 카드 위에 떠 있는 느낌 */
  padding-top: var(--space-1);
  margin-top: var(--space-1);
}
/* arena가 OX 버튼에 가려지지 않게 하단 패딩 확보 */
.view--game .arena {
  margin-bottom: 0;
}
.view--game {
  padding-bottom: calc(env(safe-area-inset-bottom, 0px) + var(--space-2));
}
.box {
  position: relative;
  border: 4px solid var(--text-outline);
  border-radius: var(--radius-card);
  padding: var(--space-2);
  min-height: 14vh;
  font-family: var(--font-title);
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--duration-fast), box-shadow var(--duration-fast), filter var(--duration-fast);
  box-shadow: var(--shadow-btn);
  display: flex;
  align-items: center;
  justify-content: center;
}
.box:active:not([disabled]) {
  transform: translateY(4px);
  box-shadow: var(--shadow-btn-active);
}
.box[disabled] { cursor: not-allowed; opacity: 0.85; }
.box.is-selected { outline: 4px solid var(--text-primary); outline-offset: -8px; }
.box.is-correct-reveal { animation: bounce-soft 0.5s ease-in-out 2; }
.box.is-wrong-reveal { filter: grayscale(0.5) brightness(0.7); }
.box--o {
  background: radial-gradient(circle at 30% 20%, #4fc3f7 0%, var(--color-o) 60%, var(--color-o-shadow) 100%);
}
.box--x {
  background: radial-gradient(circle at 30% 20%, #ff7961 0%, var(--color-x) 60%, var(--color-x-shadow) 100%);
}
.box__label {
  font-size: clamp(48px, 14vmin, 88px);
  line-height: 1;
  color: var(--text-primary);
  -webkit-text-stroke: 3px var(--text-outline);
  text-shadow: 4px 4px 0 var(--text-outline);
}

/* ── CHARACTER base (intro crowd 호환 — grid item, 큰 사이즈) ── */
.character {
  width: clamp(40px, 10vmin, 64px);
  height: clamp(40px, 10vmin, 64px);
  display: inline-block;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center bottom;
  position: relative;
  animation: idle-jump 0.9s ease-in-out infinite;
  animation-delay: var(--jump-delay, 0s);
}
.character.is-me {
  filter: drop-shadow(0 0 6px var(--color-o)) drop-shadow(0 2px 4px rgba(0,0,0,0.4));
  z-index: 2;
}
.character.is-me::after {
  content: '나';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-o);
  color: var(--text-primary);
  font-size: 10px;
  padding: 1px 6px;
  border-radius: var(--radius-chip);
  font-family: var(--font-title);
  white-space: nowrap;
  border: 1.5px solid var(--text-outline);
  box-shadow: 0 1px 0 var(--text-outline);
  pointer-events: none;
}
.character.is-spawning { animation: spawn-pop 0.4s ease-out forwards; }

/* ── ARENA SPRITES (v2 — 절대 위치, transform 이동) ── */
.arena__sprites .character {
  position: absolute;
  width: clamp(20px, 5.5vmin, 32px);
  height: clamp(20px, 5.5vmin, 32px);
  left: var(--x, 50%);
  top: var(--y, 50%);
  transform: translate(-50%, -50%);
  transition: left 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              top 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: left, top;
  animation: idle-jump 0.9s ease-in-out infinite;
  animation-delay: var(--jump-delay, 0s);
  pointer-events: none;
}
.arena__sprites .character.is-me {
  width: clamp(24px, 6.5vmin, 38px);
  height: clamp(24px, 6.5vmin, 38px);
  z-index: 5;
}
.arena__sprites .character.is-me::after {
  top: -12px;
  font-size: 9px;
  padding: 1px 4px;
}
.arena__sprites .character.is-cheering { animation: cheer-jump 0.4s ease-in-out infinite; }

/* ── ELIMINATION EFFECTS (4종 랜덤) ── */
.arena__sprites .character.is-eliminated {
  pointer-events: none;
  animation: none !important;
  transition: none;
  z-index: 4;
}

/* effect-fall — 추락 (회전 + 화면 아래) */
.arena__sprites .character.effect-fall {
  animation: eff-fall 0.6s ease-in forwards !important;
}
@keyframes eff-fall {
  0%   { transform: translate(-50%, -50%) rotate(0deg); opacity: 1; }
  100% { transform: translate(-50%, calc(-50% + 100vh)) rotate(540deg); opacity: 0; }
}

/* effect-poof — 주저앉으면서 사라짐 + ✦ 텍스트 burst */
.arena__sprites .character.effect-poof {
  animation: eff-poof 0.5s ease-out forwards !important;
}
.arena__sprites .character.effect-poof::before {
  content: '✦';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8em;
  color: var(--text-primary);
  -webkit-text-stroke: 2px var(--text-outline);
  animation: eff-poof-burst 0.5s ease-out forwards;
}
@keyframes eff-poof {
  0%   { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  60%  { transform: translate(-50%, -45%) scale(0.7); opacity: 0.8; }
  100% { transform: translate(-50%, -45%) scale(0); opacity: 0; }
}
@keyframes eff-poof-burst {
  0%   { transform: scale(0); opacity: 1; }
  60%  { transform: scale(1.4); opacity: 1; }
  100% { transform: scale(2); opacity: 0; }
}

/* effect-floor-crack — 0.2초 균열 후 추락 */
.arena__sprites .character.effect-floor-crack {
  animation: eff-crack-pause 0.2s steps(1) forwards,
             eff-fall 0.6s ease-in 0.2s forwards !important;
}
.arena__sprites .character.effect-floor-crack::after {
  content: '⚡';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8em;
  color: var(--bg-victory);
  animation: eff-crack-blink 0.2s ease-in-out 1;
}
@keyframes eff-crack-pause {
  0%, 100% { transform: translate(-50%, -48%); }
  50% { transform: translate(calc(-50% + 2px), -48%); }
}
@keyframes eff-crack-blink {
  0%, 100% { opacity: 0; }
  50% { opacity: 1; }
}

/* effect-rocket — 위로 솟구쳐 사라짐 */
.arena__sprites .character.effect-rocket {
  animation: eff-rocket 0.7s cubic-bezier(0.4, -0.2, 0.6, 1) forwards !important;
}
@keyframes eff-rocket {
  0%   { transform: translate(-50%, -50%) rotate(0deg) scale(1); opacity: 1; }
  20%  { transform: translate(-50%, -45%) rotate(-15deg) scale(1.1); opacity: 1; }
  100% { transform: translate(-50%, calc(-50% - 110vh)) rotate(180deg) scale(0.5); opacity: 0; }
}

/* 지속 점프 — translate(-50%, -50%) 중앙정렬 offset을 keyframe에서 유지해야
   sprite가 좌상단으로 튀지 않음 (.character의 base transform과 충돌 방지) */
@keyframes idle-jump {
  0%, 100% { transform: translate(-50%, -50%); }
  50%      { transform: translate(-50%, calc(-50% - 8px)); }
}
@keyframes cheer-jump {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%      { transform: translate(-50%, calc(-50% - 16px)) scale(1.1); }
}

@keyframes spawn-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}
@keyframes arrive-bounce {
  0%   { transform: translateY(40px) scale(0.6); opacity: 0; }
  60%  { transform: translateY(-8px) scale(1.1); opacity: 1; }
  100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* OX 버튼은 박스(.box--o/x)로 통합. 별도 .ox-btn 클래스 사용 안 함.
   라운드 테마 시각효과는 box--o/x · arena 배경에서 처리 (zone 클래스는 사용하지 않음). */

/* ── END VIEW (3분기: win / lose-survivor / lose-ranking) ── */
.view--end {
  background: var(--bg-victory);
  overflow: hidden;
}
.view--end[data-result="lose-survivor"] {
  background: linear-gradient(180deg, #2a2a3a 0%, #1a1a2e 100%);
  color: var(--text-primary);
}
.view--end[data-result="lose-ranking"] {
  background: linear-gradient(180deg, #4a3a4e 0%, #2a2a3a 100%);
  color: var(--text-primary);
}
.view--end[data-result="lose-survivor"] .burst,
.view--end[data-result="lose-ranking"] .burst,
.view--end[data-result="lose-survivor"] .coins,
.view--end[data-result="lose-ranking"] .coins {
  display: none;
}

.burst {
  position: absolute;
  inset: 0;
  background:
    conic-gradient(
      from 0deg,
      var(--bg-victory) 0deg, #ffec8b 10deg,
      var(--bg-victory) 20deg, #ffec8b 30deg,
      var(--bg-victory) 40deg, #ffec8b 50deg,
      var(--bg-victory) 60deg, #ffec8b 70deg,
      var(--bg-victory) 80deg, #ffec8b 90deg,
      var(--bg-victory) 100deg, #ffec8b 110deg,
      var(--bg-victory) 120deg
    );
  animation: spin var(--duration-slow) linear infinite;
  z-index: 0;
  opacity: 0.6;
}
.champion {
  font-size: clamp(64px, 18vmin, 120px);
  position: relative;
  z-index: 2;
  animation: bounce-soft 1.2s ease-in-out infinite;
}
.view--end[data-result^="lose"] .title--end {
  color: var(--text-primary);
  -webkit-text-stroke: 2px var(--text-outline);
  font-size: clamp(36px, 11vmin, 64px);
}
.end__primary {
  font-family: var(--font-title);
  font-size: clamp(20px, 5.5vmin, 30px);
  color: var(--text-dark);
  -webkit-text-stroke: 1px var(--text-primary);
  position: relative;
  z-index: 2;
  margin: 0;
  text-align: center;
}
.end__secondary {
  font-family: var(--font-body);
  font-size: clamp(15px, 4vmin, 20px);
  color: var(--text-dark);
  position: relative;
  z-index: 2;
  margin: 0;
  text-align: center;
  opacity: 0.85;
}
.view--end[data-result^="lose"] .end__primary,
.view--end[data-result^="lose"] .end__secondary {
  color: var(--text-primary);
  -webkit-text-stroke: 0;
}
.end__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  max-width: 360px;
  position: relative;
  z-index: 2;
}

/* ── INTRO V2 BADGE ── */
.badge {
  display: inline-block;
  font-family: var(--font-title);
  font-size: clamp(12px, 3vmin, 14px);
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--text-outline);
  box-shadow: 0 2px 0 var(--text-outline);
  white-space: nowrap;
}
.badge--v2 {
  background: var(--bg-victory);
  color: var(--text-dark);
  animation: bounce-soft 2s ease-in-out infinite;
}

/* ── ERROR VIEW ── */
.view--error { background: var(--bg-error); }
.error__icon { font-size: clamp(64px, 18vmin, 96px); }
.error__message { font-size: clamp(14px, 4vmin, 18px); color: var(--text-muted); margin: 0; }

/* ── TOAST ── */
.toast {
  position: fixed;
  left: 50%;
  bottom: 8vh;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.85);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: clamp(14px, 3.5vmin, 16px);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  border: 2px solid var(--text-primary);
  max-width: 90vw;
  text-align: center;
  z-index: 100;
  animation: toast-in var(--duration-fast) ease-out;
}
.toast[hidden] { display: none; }

/* ── COIN RAIN (END VIEW) ── */
.coins {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
.coin {
  position: absolute;
  top: -10vh;
  font-size: clamp(20px, 5vmin, 32px);
  animation: coin-fall linear infinite;
}
.coin:nth-child(1)  { left: 5%;  animation-duration: 2.4s; animation-delay: 0.0s; }
.coin:nth-child(2)  { left: 15%; animation-duration: 3.1s; animation-delay: 0.4s; }
.coin:nth-child(3)  { left: 25%; animation-duration: 2.7s; animation-delay: 0.8s; }
.coin:nth-child(4)  { left: 35%; animation-duration: 3.5s; animation-delay: 0.2s; }
.coin:nth-child(5)  { left: 45%; animation-duration: 2.9s; animation-delay: 1.0s; }
.coin:nth-child(6)  { left: 55%; animation-duration: 3.3s; animation-delay: 0.6s; }
.coin:nth-child(7)  { left: 65%; animation-duration: 2.5s; animation-delay: 1.2s; }
.coin:nth-child(8)  { left: 75%; animation-duration: 3.7s; animation-delay: 0.3s; }
.coin:nth-child(9)  { left: 85%; animation-duration: 2.8s; animation-delay: 0.9s; }
.coin:nth-child(10) { left: 92%; animation-duration: 3.2s; animation-delay: 0.1s; }
.coin:nth-child(11) { left: 30%; animation-duration: 4.0s; animation-delay: 1.5s; }
.coin:nth-child(12) { left: 70%; animation-duration: 3.6s; animation-delay: 1.8s; }

/* ── ANIMATIONS ── */
@keyframes coin-fall {
  0%   { transform: translateY(0) rotate(0deg); opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0.4; }
}
@keyframes bounce-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ── REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── DESKTOP BEST-EFFORT (1차 best-effort, 모바일 우선) ── */
@media (min-width: 768px) {
  .view { max-width: 480px; margin: 0 auto; }
}

/* === V3: GRAND SLAM EFFECTS === */
.end[data-result="win-grand-slam"] .title--end {
  background: linear-gradient(135deg, #ffd700 0%, #ffaa00 50%, #ffd700 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-stroke: 0;
  text-shadow: 0 2px 8px rgba(255, 215, 0, 0.6);
  font-size: clamp(36px, 9vmin, 64px);
}
.end[data-result="win-grand-slam"] .champion {
  position: relative;
  filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.8));
}
.end[data-result="win-grand-slam"] .champion::after {
  content: '';
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.4) 0%, transparent 70%);
  z-index: -1;
  animation: gs-glow 2s ease-in-out infinite;
}
@keyframes gs-glow {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50%      { transform: scale(1.3); opacity: 1; }
}
.end[data-result="win-grand-slam"] .end__primary::before {
  content: '⭐ ⭐ ⭐ ⭐ ⭐';
  display: block;
  font-size: 1.4em;
  letter-spacing: 4px;
  margin-bottom: var(--space-2);
}

/* === V3: ME LABEL ("나" 노란 캡슐) === */
.arena__sprites .character.is-me::before {
  content: '나';
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-victory);
  color: var(--bg-primary);
  font-family: 'Black Han Sans', sans-serif;
  font-size: 9px;
  padding: 1px 6px;
  border-radius: 8px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 6;
}

/* === V4: TIMER CLOCK IMAGE === */
.timer__clock {
  width: 1.6em;
  height: 1.6em;
  vertical-align: middle;
  margin-right: 4px;
  image-rendering: -webkit-optimize-contrast;
}
.timer.is-warning .timer__clock {
  animation: clock-shake 0.3s ease-in-out infinite;
}
@keyframes clock-shake {
  0%, 100% { transform: translateX(0) rotate(0); }
  25%      { transform: translateX(-2px) rotate(-3deg); }
  75%      { transform: translateX(2px) rotate(3deg); }
}

/* === V4: VIGNETTE RED (위급/오답 시 화면 가장자리) === */
#app.is-vignette::after {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url('_refs/sprites/fx-vignette-red.png');
  background-size: 100% 100%;
  pointer-events: none;
  z-index: 100;
  opacity: 0;
  animation: vignette-pulse 0.8s ease-out forwards;
}
@keyframes vignette-pulse {
  0%   { opacity: 0; }
  20%  { opacity: 0.8; }
  100% { opacity: 0; }
}

/* === V4: 판정 스탬프 (pass/fail/perfect) === */
.fx-stamp {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60%;
  max-width: 280px;
  transform: translate(-50%, -50%) scale(0) rotate(-25deg);
  pointer-events: none;
  z-index: 50;
  opacity: 0;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.4));
}
.fx-stamp.is-shown {
  animation: stamp-impact 0.45s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
.fx-stamp.is-fading {
  animation: stamp-fade 0.4s ease-out forwards;
}
@keyframes stamp-impact {
  0%   { transform: translate(-50%, -50%) scale(0) rotate(-25deg); opacity: 0; }
  60%  { transform: translate(-50%, -50%) scale(1.2) rotate(8deg); opacity: 1; }
  100% { transform: translate(-50%, -50%) scale(1) rotate(0); opacity: 1; }
}
@keyframes stamp-fade {
  to { transform: translate(-50%, -50%) scale(1.1) rotate(0); opacity: 0; }
}

/* === V4: 파티클 (정답/오답/grand slam 폭발) === */
.fx-particle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 32px;
  height: 32px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 40;
  animation: particle-burst 1.0s cubic-bezier(0.4, 0, 0.2, 1) var(--delay, 0s) forwards;
  opacity: 0;
}
.fx-particle--grandslam { width: 48px; height: 48px; }
@keyframes particle-burst {
  0%   { transform: translate(-50%, -50%) scale(0.3) rotate(0); opacity: 0; }
  20%  { transform: translate(calc(-50% + var(--px, 0px) * 0.3), calc(-50% + var(--py, 0px) * 0.3)) scale(1) rotate(calc(var(--rot, 0deg) * 0.3)); opacity: 1; }
  100% { transform: translate(calc(-50% + var(--px, 0px)), calc(-50% + var(--py, 0px) + 80px)) scale(0.6) rotate(var(--rot, 0deg)); opacity: 0; }
}

/* === V4: 말풍선 (NPC 탈락/환호 1초 표시) === */
.fx-bubble {
  position: absolute;
  top: -28px;
  left: 50%;
  width: 36px;
  height: auto;
  transform: translateX(-50%) scale(0);
  pointer-events: none;
  z-index: 7;
  animation: bubble-pop 1.1s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes bubble-pop {
  0%   { transform: translateX(-50%) translateY(8px) scale(0); opacity: 0; }
  20%  { transform: translateX(-50%) translateY(0) scale(1.1); opacity: 1; }
  35%  { transform: translateX(-50%) translateY(-2px) scale(1); }
  85%  { transform: translateX(-50%) translateY(-4px) scale(1); opacity: 1; }
  100% { transform: translateX(-50%) translateY(-12px) scale(0.9); opacity: 0; }
}

/* === V4: SPAWN COLUMN ANIMATION === */
.arena__sprites .character.is-spawning-column {
  animation: spawn-column-fall var(--spawn-duration, 1.5s) cubic-bezier(0.4, 0, 0.2, 1) var(--spawn-delay, 0s) both;
}
@keyframes spawn-column-fall {
  0%   { transform: translate(-50%, calc(-50% - 60vh)); opacity: 0; }
  20%  { opacity: 1; }
  100% { transform: translate(-50%, -50%); opacity: 1; }
}

/* ============================================================
   인트로 한정 — 버블버블 레트로 보강
   (다른 view는 건드리지 않도록 .view--intro 스코프)
   ============================================================ */
.view--intro .badge--v2 {
  background: linear-gradient(180deg, rgba(255,95,162,0.95), rgba(255,95,162,0.7));
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 0 0 18px rgba(255,95,162,0.5);
  padding: 6px 14px;
  border-radius: 999px;
  font-family: var(--font-title);
  font-size: clamp(11px, 2.8vmin, 13px);
  letter-spacing: 0.02em;
}
.view--intro .category-pick__label {
  color: var(--bg-victory);
  text-shadow: 0 0 8px rgba(253,216,53,0.4);
}
.view--intro .category-pick__select {
  border: 3px solid rgba(0,224,208,0.45);
  background-color: rgba(15,12,30,0.85);
  color: #fff;
  box-shadow:
    inset 0 0 14px rgba(0,224,208,0.20),
    0 0 20px rgba(0,224,208,0.28);
}
.view--intro .hint {
  color: #ffe89e;
  text-shadow: 0 0 8px rgba(255,232,158,0.35);
}
.view--intro .btn--primary {
  background: linear-gradient(180deg, #00d4c5 0%, #00a89d 100%);
  border: 3px solid #fff;
  color: #fff;
  box-shadow:
    var(--shadow-btn),
    inset 0 -4px 0 rgba(0,0,0,0.15),
    0 0 28px rgba(0,224,208,0.5);
  text-shadow: 0 2px 0 rgba(0,0,0,0.25);
}
.view--intro .btn--primary:active:not([disabled]) {
  box-shadow:
    var(--shadow-btn-active),
    inset 0 -2px 0 rgba(0,0,0,0.15),
    0 0 22px rgba(0,224,208,0.6);
}
.view--intro .intro-status {
  color: #b8a8d8;
}

/* 모션 줄이는 사용자 배려 */
@media (prefers-reduced-motion: reduce) {
  .crowd__char,
  .crowd__char.is-me,
  .view--intro::before,
  .view--intro::after {
    animation: none !important;
  }
}

/* ============================================================
   음소거 토글 FAB (전 화면 공용)
   ============================================================ */
.mute-fab {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0px) + 12px);
  right: calc(env(safe-area-inset-right, 0px) + 12px);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.25);
  font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  z-index: 100;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.mute-fab:hover { background: rgba(0, 0, 0, 0.7); transform: scale(1.06); }
.mute-fab:active { transform: scale(0.94); }
.mute-fab[data-muted="1"] {
  background: rgba(40, 30, 30, 0.55);
  border-color: rgba(239, 83, 80, 0.4);
}

/* ============================================================
   학습 모드 링크 (인트로 — 시작 버튼 아래)
   ============================================================ */
.study-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(0, 224, 208, 0.10);
  border: 2px solid rgba(0, 224, 208, 0.35);
  color: #d6f5ef;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: clamp(13px, 3.4vmin, 15px);
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
  cursor: pointer;
}
.study-link:hover {
  background: rgba(0, 224, 208, 0.18);
  border-color: rgba(0, 224, 208, 0.55);
}
.study-link:active { transform: scale(0.97); }
.study-link__label {
  font-family: var(--font-title);
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #fff;
}
.study-link__sub {
  font-size: 0.78em;
  color: rgba(255, 255, 255, 0.7);
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  padding-left: 8px;
  margin-left: 4px;
}