/*--- 글로벌 ---*/
body {
  background: #e0e7ef;
  min-height: 100vh;
  margin: 0;
  font-family: 'Pretendard', 'Noto Sans KR', sans-serif;
}
.iqtest-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 30px;
}

/*--- 메인 페이지 컨테이너 ---*/
.main-container {
  background: #fff;
  border-radius: 32px;
  box-shadow: 0 8px 44px #7dd3fc22, 0 1.5px 8px #6366f122;
  padding: 40px 32px 32px;
  max-width: 530px;
  width: 98vw;
  margin: 0 auto;
  text-align: center;
}
.title {
  font-size: 2.2rem;
  font-weight: 800;
  color: #4f46e5;
  letter-spacing: 1.5px;
  margin-bottom: 4px;
}
.subtitle {
  font-size: 1.13rem;
  color: #64748b;
  margin-bottom: 30px;
}

/*--- 퍼즐 카드 그리드 ---*/
.puzzle-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  width: 390px;
  max-width: 98vw;
  margin: 10px auto;
  aspect-ratio: 1/1;
  gap: 0;
  perspective: 900px;
  position: relative;
  background: #e0e7ef;
  border-radius: 27px;
  box-shadow: 0 6px 26px #38bdf81a, 0 1.5px 8px #6366f122;
}

/*--- 퍼즐 카드(애니/hover 포함) ---*/
.puzzle-card {
  position: relative;
  aspect-ratio: 1/1;
  overflow: hidden;
  background: #fff;
  cursor: pointer;
  box-shadow: 0 2px 11px #0001;
  border-radius: 17px;
  z-index: 1;
  transition:
    box-shadow 0.19s,
    filter 0.17s,
    z-index 0.17s,
    transform 0.38s cubic-bezier(.18,1.3,.49,1.02);
}
.puzzle-bg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  background-image: url('../img/main2.jpg');
  background-size: 200% 200%;
  background-repeat: no-repeat;
  background-position: center center;
  z-index: 1;
  filter: brightness(0.96) saturate(1.04);
  transition: filter 0.23s, transform 0.18s;
}
/* 4조각별 이미지 위치 */
.piece-tl .puzzle-bg { background-position: left top; }
.piece-tr .puzzle-bg { background-position: right top; }
.piece-bl .puzzle-bg { background-position: left bottom; }
.piece-br .puzzle-bg { background-position: right bottom; }

/* hover/touch 효과 */
.puzzle-card:hover, .puzzle-card:focus-visible, .puzzle-card.touch {
  z-index: 10;
  box-shadow: 0 20px 58px #6366f177, 0 2px 12px #38bdf833;
  filter: brightness(1.09) contrast(1.11);
  transform: perspective(650px) rotateX(-14deg) scale(1.04);
}
.puzzle-card:hover .puzzle-bg,
.puzzle-card.touch .puzzle-bg {
  filter: brightness(1.10) blur(0.08px);
  transform: scale(1.06) rotate(-0.7deg);
}

/*--- 카드 내용(슬라이드다운) ---*/
.puzzle-content {
  position: absolute; left: 0; right: 0; bottom: 0;
  z-index: 2;
  background: linear-gradient(0deg, #fffbeeb8 85%, #f4f8ff00 100%);
  padding: 18px 10px 12px;
  border-radius: 0 0 16px 16px;
  font-size: 1.09rem;
  box-shadow: 0 6px 32px #6366f122;
  transform: translateY(92%) scale(0.97);
  opacity: 0;
  pointer-events: none;
  transition: 
    opacity 0.34s cubic-bezier(.31,1.7,.53,1),
    transform 0.36s cubic-bezier(.34,1.6,.48,1);
  will-change: opacity, transform;
}
.puzzle-card:hover .puzzle-content,
.puzzle-card:focus .puzzle-content,
.puzzle-card:focus-visible .puzzle-content,
.puzzle-card.touch .puzzle-content {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1.04);
  transition-delay: 0.05s;
}

/*--- 카드 텍스트 fade-in ---*/
.card-title, .card-desc, .card-time {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.42s cubic-bezier(.34,1.6,.48,1),
    transform 0.41s cubic-bezier(.34,1.6,.48,1);
}
.puzzle-card:hover .card-title,
.puzzle-card:hover .card-desc,
.puzzle-card:hover .card-time,
.puzzle-card:focus .card-title,
.puzzle-card:focus .card-desc,
.puzzle-card:focus .card-time {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0s;
}

/* 모바일: 카드에 .touch 붙으면 순차 fade-in */
@media (hover:none) and (pointer:coarse), (max-width:600px) {
  .puzzle-card .card-title,
  .puzzle-card .card-desc,
  .puzzle-card .card-time {
    opacity: 0; transform: translateY(22px);
    transition:
      opacity 0.42s cubic-bezier(.34,1.6,.48,1),
      transform 0.41s cubic-bezier(.34,1.6,.48,1);
  }
  .puzzle-card.touch .card-title {
    opacity: 1; transform: translateY(0); transition-delay: 0.12s;
  }
  .puzzle-card.touch .card-desc {
    opacity: 1; transform: translateY(0); transition-delay: 0.40s;
  }
  .puzzle-card.touch .card-time {
    opacity: 1; transform: translateY(0); transition-delay: 0.60s;
  }
  .title { margin-bottom: 5vw !important; }
}

/* 텍스트 스타일 */
.card-title {
  font-weight: 800;
  font-size: 1.17rem;
  color: #312e81;
  margin-bottom: 7px;
  text-shadow: 0 2px 7px #fff3;
}
.card-desc {
  font-size: 1.01rem;
  color: #475569;
  line-height: 1.43;
  font-weight: 500;
}
.card-time {
  font-size: 0.93rem;
  color: #0ea5e9;
  margin-left: 6px;
  font-weight: 700;
}

/* 파티클 효과(모바일만) */
.puzzle-content .particle {
  position: absolute; width: 8px; height: 8px; border-radius: 50%;
  pointer-events: none; z-index: 4; background: #a5b4fc; box-shadow: 0 0 7px #fff8;
  opacity: 0.9; transition: transform 0.75s cubic-bezier(.32,1.6,.59,1), opacity 0.7s;
  will-change: transform, opacity;
}

/*--- 반응형 ---*/
@media (max-width:600px) {
  .iqtest-wrap { padding: 20px 15px 0 10px;}
  .main-container { padding: 10px 3vw; max-width: 89vw;}
  .puzzle-cards-grid { width: 89vw; }
  .title {padding-top: 30px;}
}
@media (max-width:400px) {
  .puzzle-cards-grid { border-radius: 18px;}
}

/* --- 푸터 --- */
.iqtest-footer {
  margin: 10px 0; font-size: 0.97rem; color: #94a3b8; text-align: center; letter-spacing: 0.05em;
}
@media (max-width: 500px) { .iqtest-footer { font-size: .9rem; padding: 10px 0; } }
.no-underline { text-decoration: none; color: inherit; }