/* MathHaru 메인 홈페이지 전용 스타일. 색상 변수는 base.css의 :root를 그대로 사용한다.
   장식은 최소화한다: 카드/그림자/둥근 모서리/애니메이션을 쓰지 않고,
   문제지 미리보기 그림에만 은은한 그림자 하나를 둔다. */

.home-body {
  background: var(--bg);
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- 히어로 (2단) ---------- */

.hero-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  padding: 96px 0 100px;
}

.hero-eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.02em;
}

.hero-left h1 {
  margin: 0 0 20px;
  font-size: 40px;
  line-height: 1.35;
  font-weight: 900;
  color: var(--ink);
}

.hero-desc {
  max-width: 440px;
  margin: 0 0 32px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.hero-cta {
  display: inline-block;
  padding: 15px 32px;
  font-size: 16px;
  font-weight: 900;
  color: #fff;
  background: var(--accent);
  text-decoration: none;
}

.hero-cta:hover {
  background: #1d4fd1;
}

.grade-status {
  list-style: none;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 40px 0 0;
  padding: 0;
}

.grade-status-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: var(--paper);
  font-size: 13px;
}

.grade-status-name {
  font-weight: 700;
  color: var(--ink);
}

.grade-status-tag {
  font-size: 12px;
  font-weight: 700;
  color: #9a9ea5;
}

.grade-status-item.available .grade-status-tag {
  color: var(--accent);
}

.hero-right {
  display: flex;
  justify-content: center;
}

.hero-illustration {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 16px 28px rgba(30, 41, 59, 0.12));
}

/* ---------- 서비스 소개 ---------- */

.intro {
  padding: 72px 0;
  border-top: 1px solid var(--line-soft);
}

.intro h2 {
  margin: 0 0 18px;
  font-size: 24px;
  font-weight: 900;
  color: var(--ink);
}

.intro > p {
  max-width: 720px;
  margin: 0 0 48px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.benefits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.benefit h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 900;
  color: var(--ink);
}

.benefit p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 이용 방법 ---------- */

.usage {
  padding: 64px 0 96px;
  border-top: 1px solid var(--line-soft);
}

.usage h2 {
  margin: 0 0 32px;
  font-size: 24px;
  font-weight: 900;
  color: var(--ink);
}

.usage-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.usage-step {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 0 24px;
  border-left: 2px solid var(--line);
}

.usage-step:first-child {
  padding-left: 0;
  border-left: none;
}

.usage-step-num {
  font-size: 20px;
  font-weight: 900;
  color: var(--accent);
}

.usage-step-label {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

/* ---------- 모바일: 세로 배치 ---------- */

@media screen and (max-width: 860px) {
  main {
    padding: 0 20px;
  }

  .hero-split {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 56px 0 64px;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-left h1 {
    font-size: 30px;
  }

  .grade-status {
    justify-content: center;
  }

  .hero-illustration {
    max-width: 300px;
  }

  .intro,
  .usage {
    padding: 48px 0;
  }

  .benefits {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .usage-steps {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .usage-step,
  .usage-step:first-child {
    padding: 0 0 0 16px;
    border-left: 2px solid var(--line);
  }
}