/* 뱀 대전 — 아케이드 게임. 캔버스 1장 + 오버레이 구조.
   팔레트: 아레나 남색 #0F1E3D / 네온 라임 #B4FF39 (블루프린트 7절). */
:root {
  --bg: #0F1E3D;
  --bg2: #0a1429;
  --ink: #e8f0ff;
  --dim: #93a3c8;
  --lime: #B4FF39;
  --lime-dark: #6f9e15;
  --pill: #d5dcf5;
  --pill-ink: #22304f;
}

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

html, body {
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg2);
  color: var(--ink);
  font: 700 16px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  overscroll-behavior: none;
  touch-action: manipulation;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

/* ARCADE-FIT: 게임 프레임. 폰에선 화면 전체, 데스크톱에선 가운데 뜬 폰 모양(아래 미디어쿼리).
   오버레이는 전부 이 안에 `position:absolute` 로 갇힌다 — fixed 를 쓰면 프레임 밖으로 샌다. */
#app {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg);
}

main { position: absolute; inset: 0; }

/* 캔버스는 프레임을 꽉 채운다. 9:16 이 아닌 폰에서 남는 띠는 app.js 가
   아레나 바깥(어두운 바닥)을 이어 그려 메운다 — 검은 띠를 만들지 않는다. */
#stage {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
}

#deskHint { display: none; }

.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.4rem;
  background: rgba(5, 10, 24, .84);
}
.overlay[hidden] { display: none; }

.sheet {
  width: 100%;
  max-width: 22rem;
  max-height: 100%;
  overflow-y: auto;
  background: linear-gradient(180deg, #223357, #14203c);
  border-radius: 1.4rem;
  padding: 1.5rem 1.3rem;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .12), 0 1rem 2rem rgba(0, 0, 0, .55);
}

.sheet h1 { font-size: 1.15rem; margin-bottom: 1rem; color: var(--ink); }

.sheet button {
  width: 100%;
  padding: .95rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #d9ff8f, var(--lime));
  color: #1d2c06;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .8), inset 0 -3px 0 var(--lime-dark);
  margin-top: .6rem;
}

.sheet button.ghost {
  background: linear-gradient(180deg, #eef1ff, var(--pill));
  color: var(--pill-ink);
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .9), inset 0 -3px 0 #a9b3d8;
}
.sheet button.ghost[hidden] { display: none; }

/* ── 결과창 ───────────────────────────────────────── */
.result-sheet { text-align: center; }
.result-sheet h1 { margin-bottom: .5rem; }

.stars {
  display: flex;
  justify-content: center;
  gap: .35rem;
  margin: .2rem 0 .8rem;
  font-size: 2rem;
  line-height: 1;
}
.stars span { filter: grayscale(1) brightness(.55); }
.stars span.on { filter: none; text-shadow: 0 0 .7rem rgba(255, 200, 60, .8); }

#result-stats {
  display: flex;
  gap: .5rem;
  margin: .2rem 0 .9rem;
}
#result-stats .stat {
  flex: 1;
  padding: .6rem .3rem;
  border-radius: .8rem;
  background: rgba(0, 0, 0, .3);
}
#result-stats .stat b { display: block; font-size: 1.5rem; color: #fff; line-height: 1.1; }
#result-stats .stat span { font-size: .72rem; font-weight: 700; color: var(--dim); }

#result-why {
  margin-bottom: .9rem;
  color: var(--dim);
  font-size: .9rem;
  font-weight: 600;
}

/* 부활은 결과창의 주인공 버튼이다 — 금빛으로 강조. */
.sheet button#revive {
  background: linear-gradient(180deg, #ffe066, #ffb800);
  color: #4a3200;
  font-size: .98rem;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .85), inset 0 -3px 0 #c98a00,
    0 .35rem 1.1rem rgba(255, 179, 0, .45);
  animation: gold 1.8s ease-in-out infinite;
}
@keyframes gold {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.035); }
}

/* ── 홈 ───────────────────────────────────────────── */
#home {
  background:
    linear-gradient(180deg, rgba(15, 30, 61, .55), rgba(8, 16, 34, .92)),
    url("../assets/arena.webp") center / 220px repeat;
}

.home-sheet {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  align-items: center;
  justify-content: flex-end;
  text-align: center;
  max-width: 20rem;
  height: 100%;
  background: none;
  box-shadow: none;
  padding: 1rem .6rem;
  overflow: visible;
}

.home-title {
  font-size: 2.9rem;
  font-weight: 800;
  letter-spacing: .02em;
  color: #fff;
  line-height: 1;
  margin: 0;
  text-shadow: 0 .16rem 0 #16264a, 0 0 1.6rem rgba(180, 255, 57, .45);
  cursor: pointer;
}
.home-sheet h1.home-title { font-size: 2.9rem; margin-bottom: 0; }
.home-sub {
  font-size: .88rem;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: .02em;
  opacity: .9;
}

#homeHero {
  width: 46%;
  max-width: 9.5rem;
  height: auto;
  margin: .2rem 0 -.2rem;
  cursor: pointer;
  filter: drop-shadow(0 .7rem 1.3rem rgba(0, 0, 0, .6));
  animation: bob 2.6s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

#homeMain { width: 100%; }

#tapToStart {
  display: block;
  width: 100%;
  padding: .95rem 1rem;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(180deg, #d9ff8f, var(--lime));
  color: #1d2c06;
  font: inherit;
  font-size: 1.25rem;
  font-weight: 800;
  cursor: pointer;
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .85), inset 0 -4px 0 var(--lime-dark),
    0 .4rem 1.2rem rgba(180, 255, 57, .35);
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.045); }
}

.carousel {
  display: flex;
  gap: .45rem;
  width: 100%;
  overflow-x: auto;
  padding: .3rem .1rem;
  scrollbar-width: none;
}
.carousel::-webkit-scrollbar { display: none; }

.home-sheet .skin-chip {
  flex: 0 0 auto;
  width: 2.9rem;
  height: 2.9rem;
  padding: 0;
  border: 2px solid rgba(255, 255, 255, .25);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, color-mix(in srgb, var(--chip) 55%, #fff), var(--chip));
  cursor: pointer;
  overflow: hidden;
  display: grid;
  place-items: center;
}
.home-sheet .skin-chip img { width: 106%; }
.home-sheet .skin-chip.on { border-color: #fff; box-shadow: 0 0 0 3px rgba(180, 255, 57, .75); }
.home-sheet .skin-chip.locked { opacity: .38; }

#homeTabs {
  display: flex;
  gap: .5rem;
  width: 100%;
  margin-top: .3rem;
}

.home-sheet .tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .15rem;
  padding: .5rem .3rem;
  border: 0;
  border-radius: .9rem;
  background: rgba(20, 34, 64, .72);
  color: #dfe5ff;
  font: inherit;
  font-size: .8rem;
  font-weight: 700;
  cursor: pointer;
  backdrop-filter: blur(4px);
}
.home-sheet .tab-btn b { font-size: 1.15rem; line-height: 1; font-weight: 400; }
.home-sheet .tab-btn:active, .home-sheet .tab-btn.active { background: var(--lime); color: #1d2c06; }

.panel { width: 100%; color: var(--ink); font-size: .9rem; }
.shop-row, .mission-row {
  display: flex;
  justify-content: space-between;
  padding: .5rem .7rem;
  margin-bottom: .3rem;
  border-radius: .6rem;
  background: rgba(20, 34, 64, .72);
}
.sheet .panel .back {
  width: 100%;
  margin-top: .5rem;
  padding: .7rem;
  border: 0;
  border-radius: 999px;
  background: var(--lime);
  color: #1d2c06;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

/* ── 데스크톱 = 가운데 뜬 폰 프레임 ─────────────────── */
@media (min-width: 768px) and (min-height: 600px) {
  body {
    background: radial-gradient(120% 90% at 50% 0%, #1e3566 0%, #0f1e3d 45%, #05080f 100%);
    gap: 1rem;
  }
  #app {
    width: min(420px, calc((100vh - 72px) * 360 / 640));
    height: min(calc(100vh - 72px), calc(420px * 640 / 360));
    border-radius: 32px;
    box-shadow: 0 0 0 10px #101828, 0 0 0 12px #253352, 0 40px 90px rgba(0, 0, 0, .65);
  }
  #stage { border-radius: 32px; }
  #deskHint {
    display: block;
    margin: 0;
    color: var(--dim);
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: .01em;
  }
}

/* 세로 전용 */
#rotate { display: none; }
@media (orientation: landscape) and (max-height: 520px) {
  #app, #deskHint { display: none !important; }
  #rotate {
    display: flex;
    position: fixed;
    inset: 0;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
    color: var(--dim);
    font-size: 1.05rem;
    line-height: 1.6;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}