/* ============================================================
   스마일캠프 전시회 — 전시회 입장 오프닝
   css/opening.css

   그림 파일을 쓰지 않는다. 도형과 SVG 로만 만든다.
   아이 얼굴을 그림으로 넣으면 파일이 무거워지고,
   해마다 캠프 사진을 바꿔 끼우기도 어렵다.
   ============================================================ */

.op {
  position: fixed; inset: 0; z-index: 9000;
  background: var(--stage);
  display: grid; place-items: center;
  overflow: hidden;
  font-family: var(--font-display);
}
.op[hidden] { display: none; }

/* 무대를 걷어 올리며 사라진다 */
.op.lift { animation: op-lift 800ms cubic-bezier(0.7, 0, 0.3, 1) forwards; }
@keyframes op-lift {
  to { transform: translateY(-100%); }
}

/* ---------- 배경 벽 ---------- */
.op-wall {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 50% 55%, #3B2E8C 0%, #241B5C 55%, #1A1444 100%);
}
.op-wall::after {                 /* 벽돌 결 — 아주 옅게 */
  content: ""; position: absolute; inset: 0; opacity: .16;
  background-image:
    linear-gradient(transparent 96%, rgba(255,255,255,.5) 96%),
    linear-gradient(90deg, transparent 97%, rgba(255,255,255,.4) 97%);
  background-size: 100% 46px, 92px 100%;
}

/* ---------- 떠다니는 아이콘 ---------- */
.op-float { position: absolute; inset: 0; pointer-events: none; }
.op-ic {
  position: absolute; font-size: 26px; line-height: 1;
  opacity: 0; color: #fff;
  animation: op-in 500ms var(--ease) forwards, op-bob 4.5s ease-in-out infinite;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,.35));
}
.op-ic.px {                        /* 픽셀 블록 */
  width: 20px; height: 20px; border-radius: 5px;
}
@keyframes op-in  { to { opacity: 1; } }
@keyframes op-bob {
  0%, 100% { transform: translateY(0) rotate(var(--rot, 0deg)); }
  50%      { transform: translateY(-14px) rotate(calc(var(--rot, 0deg) + 6deg)); }
}

/* ---------- 문 ---------- */
.op-doorway {
  position: relative; width: min(880px, 92vw); height: min(560px, 74vh);
  perspective: 1400px;
}

/* 문 안쪽에서 새어 나오는 빛 */
.op-glow {
  position: absolute; inset: 12% 18%;
  border-radius: 50%; opacity: 0;
  background: radial-gradient(circle, var(--glow) 0%, rgba(255,246,216,.55) 35%, transparent 70%);
  filter: blur(24px);
}
.op.go .op-glow { animation: op-glow 1400ms 300ms ease-out forwards; }
@keyframes op-glow {
  0%   { opacity: 0; transform: scale(.4); }
  60%  { opacity: .8; transform: scale(1.15); }
  100% { opacity: .35; transform: scale(1.4); }
}

.op-door {
  position: absolute; top: 0; bottom: 0; width: 50%;
  background: linear-gradient(160deg, var(--door-light), var(--door) 45%, var(--door-dark));
  border: 5px solid rgba(255,255,255,.22);
  transform-style: preserve-3d;
  transition: transform 1200ms cubic-bezier(0.65, 0, 0.2, 1);
  box-shadow: inset 0 0 60px rgba(0,0,0,.35);
}
.op-door.l { left: 0;  border-radius: 220px 12px 12px 220px; transform-origin: left center; }
.op-door.r { right: 0; border-radius: 12px 220px 220px 12px; transform-origin: right center; }
.op.go .op-door.l { transform: rotateY(-105deg); }
.op.go .op-door.r { transform: rotateY(105deg); }

/* 문에 새긴 글자 */
.op-carve {
  position: absolute; top: 42%; font-size: 15px; font-weight: 700;
  letter-spacing: .18em; line-height: 1.9; color: rgba(255,255,255,.55);
  text-shadow: 0 2px 0 rgba(0,0,0,.25);
}
.op-door.l .op-carve { left: 12%; }
.op-door.r .op-carve { right: 12%; text-align: right; }

/* 손잡이 */
.op-knob {
  position: absolute; top: 50%; width: 22px; height: 22px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #FFE9A8, #E0A53C);
  box-shadow: 0 2px 8px rgba(0,0,0,.4);
  margin-top: -11px;
}
.op-door.l .op-knob { right: 22px; }
.op-door.r .op-knob { left: 22px; }

/* ---------- 문 위에 얹히는 안내 ---------- */
.op-front {
  position: absolute; inset: 0; display: grid; place-content: center;
  text-align: center; gap: 18px; padding: 20px;
  transition: opacity 400ms var(--ease), transform 400ms var(--ease);
}
.op.go .op-front { opacity: 0; transform: scale(.94); pointer-events: none; }

.op-front .kicker {
  font-size: 13px; letter-spacing: .32em; color: #C9BFFF; font-weight: 700;
}
.op-front h1 {
  font-size: clamp(26px, 5.2vw, 46px); line-height: 1.25; color: #fff;
  text-shadow: 0 4px 0 rgba(0,0,0,.28);
}
.op-front h1 em { font-style: normal; }
.op-front .sub { font-size: clamp(13px, 2.4vw, 16px); color: #D9D2FF; font-family: var(--font-body); }

.op-enter {
  justify-self: center; margin-top: 6px;
  background: linear-gradient(180deg, #8B6BFF, #6B3AF0);
  color: #fff; border: 0; border-radius: 40px;
  padding: 17px 38px; font-family: var(--font-display);
  font-size: clamp(16px, 2.6vw, 20px); font-weight: 700; cursor: pointer;
  box-shadow: 0 8px 0 #4B2AB8, 0 14px 28px rgba(0,0,0,.4);
  transition: transform 120ms var(--ease), box-shadow 120ms var(--ease);
}
.op-enter:hover  { transform: translateY(-2px); box-shadow: 0 10px 0 #4B2AB8, 0 18px 32px rgba(0,0,0,.45); }
.op-enter:active { transform: translateY(6px); box-shadow: 0 2px 0 #4B2AB8, 0 6px 14px rgba(0,0,0,.4); }

/* ---------- 문 안쪽 코딩 세계 ---------- */
.op-inner {
  position: absolute; inset: 4%;
  border-radius: 200px 200px 18px 18px;
  overflow: hidden; opacity: 0;
  box-shadow: inset 0 0 80px rgba(36,27,92,.45);
}
.op.go .op-inner { animation: op-in 500ms 550ms forwards; }

/* 그림이 살짝 다가오면서 안으로 빨려 들어가는 느낌을 만든다 */
.op-hall {
  width: 100%; height: 100%; object-fit: cover; object-position: center 62%;
  transform: scale(1.28);
}
.op.go .op-hall { animation: op-zoom 2400ms 550ms cubic-bezier(0.2, 0, 0.1, 1) forwards; }
@keyframes op-zoom {
  to { transform: scale(1.02); }
}

/* 그림 위로 톡톡 튀어나오는 말풍선 */
.op-scene { position: absolute; inset: 0; pointer-events: none; }
.op-out { position: absolute; }
.op-pop {
  opacity: 0;
  animation: op-pop 620ms cubic-bezier(0.2, 1.5, 0.4, 1) forwards;
}
@keyframes op-pop {
  0%   { opacity: 0; transform: translateY(34px) scale(.4); }
  60%  { opacity: 1; transform: translateY(-10px) scale(1.08); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
.op-chip {
  border-radius: 14px; padding: 9px 14px; font-size: clamp(11px, 1.7vw, 14px);
  font-weight: 700; color: #2A1E63; background: #fff; white-space: nowrap;
  box-shadow: 0 8px 20px rgba(36,27,92,.35);
}

@media (max-width: 640px) {
  .op-doorway { height: 78vh; }
  .op-carve   { font-size: 11px; letter-spacing: .12em; }
  .op-knob    { width: 16px; height: 16px; margin-top: -8px; }
}

/* 건너뛰기 */
.op-skip {
  position: absolute; right: 18px; bottom: 18px; z-index: 2;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.28);
  color: #E4DEFF; border-radius: 30px; padding: 9px 18px;
  font-size: 13px; font-family: var(--font-body); cursor: pointer;
}
.op-skip:hover { background: rgba(255,255,255,.24); }

/* 다시 보기 — 홈 Hero 구석 */
.op-replay {
  position: absolute; right: 18px; top: 18px;
  background: rgba(255,255,255,.7); border: 1px solid var(--line);
  color: var(--ink-2); border-radius: 30px; padding: 7px 14px;
  font-size: 12.5px; cursor: pointer;
}
.op-replay:hover { background: #fff; color: var(--ink); }

/* 동작 최소화를 켠 사람에게는 오프닝을 보여주지 않는다 */
@media (prefers-reduced-motion: reduce) {
  .op { display: none !important; }
}