/* ==========================================================
   main.css - 메인 화면
   ========================================================== */

/* 메인 비주얼 */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100vh - var(--header-height));
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-primary-dark) 55%, var(--color-primary) 130%);
  color: #fff;
}
/* 배경 격자 패턴 (오른쪽으로 갈수록 진하게) */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(90deg, transparent 20%, #000 90%);
  mask-image: linear-gradient(90deg, transparent 20%, #000 90%);
}
/* 오른쪽 상단 빛 번짐 */
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  max-width: 820px;
  max-height: 820px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 120, 204, 0.55) 0%, transparent 65%);
}
.hero .container { position: relative; z-index: 1; }

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.25em;
  color: rgba(255, 255, 255, 0.75);
}
.hero__eyebrow::before { content: ''; width: 32px; height: 2px; background: var(--color-primary); }
.hero__title { margin: 20px 0; font-size: 3.75rem; font-weight: 800; line-height: 1.25; letter-spacing: -0.02em; }
.hero__title strong { color: #8cc2ff; }
.hero__desc { font-size: var(--fs-lg); opacity: 0.8; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 44px; }

/* 사업분야 카드 */
.card-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: card; }
.card {
  position: relative;
  padding: 48px 36px 40px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  counter-increment: card;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), opacity 0.6s;
}
/* 카드 번호 (01, 02, 03) */
.card::before {
  content: counter(card, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  border-radius: 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 800;
}
/* 하단 강조선 (hover 시 표시) */
.card::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.card:hover::after { transform: scaleX(1); }
.card__title { font-size: var(--fs-lg); font-weight: 700; margin-bottom: 8px; }
.card__text { color: var(--color-text-sub); }

.section__more { margin-top: 48px; text-align: center; }

/* 문의 안내 */
.cta { position: relative; padding: 80px 0; overflow: hidden; background: var(--color-primary-dark); color: #fff; }
.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 120, 204, 0.45) 0%, transparent 65%);
}
.cta__inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta__title { font-size: var(--fs-xl); font-weight: 700; }
.cta__desc { margin-top: 4px; opacity: 0.75; }
.cta__contact {
  display: grid;
  gap: 6px;
  padding: 20px 28px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.06);
  font-size: var(--fs-lg);
}
.cta__contact span { display: inline-block; width: 64px; font-size: var(--fs-sm); opacity: 0.6; }
.cta__contact a:hover { text-decoration: underline; }

@media (max-width: 768px) {
  .hero__title { font-size: 2.25rem; }
  .hero::after { width: 120vw; height: 120vw; right: -50%; }
  .card-list { grid-template-columns: 1fr; }
  .card { padding: 36px 28px 32px; }
  .cta__inner { flex-direction: column; align-items: flex-start; }
  .cta__contact { width: 100%; padding: 16px 20px; font-size: var(--fs-base); }
}