body {
    margin:0;
    /* padding:0; */
}

/* ============================
   HERO SECTION
============================ */
.hero-section {
  width: 100%;
  height: 35em;
  background-image: url('../img/main.jpg'); /* 당신이 넣을 메인 이미지 */
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-text {
  font-size: 3em;
  font-weight: 600;
  color: white;
  text-shadow: 0 0 0.4em rgba(0,0,0,0.4);
  text-align: center;
  padding: 0 2%;
}

/* ============================
   VIDEO SECTION
============================ */
.video-section {
  padding: 3em 5%;
  background: #f9fdf9;
}

.video-title {
  font-size: 2em;
  text-align: center;
  color: #2b593a;
  margin-bottom: 1.4em;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2em;
}

.video-box iframe {
  width: 100%;
  height: 20em;
  border-radius: 0.8em;
}

/* 반응형 */
@media (max-width: 900px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  .hero-section {
    height: 20em;
  }
}