* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  font-family: 'Inter', 'Noto Sans KR', system-ui, sans-serif;
  color: #fff;
}

/* Background wrapper */
.page-bg {
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
}

.page-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 0;
}

/* Page images */
.bg-index {
  background-image: url("../images/bg_index.jpg");
}

.bg-korea {
  background-image: url("../images/bg_korea.jpg");
}

.bg-usa {
  background-image: url("../images/bg_usa.jpg");
}

/* Content layer */
.page-content {
  position: relative;
  z-index: 1;
}

/* Cards */
.card {
  background: rgba(255, 255, 255, 0.95);
  color: #222;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

/* Buttons */
.btn-primary {
  border-radius: 999px;
}

/* Inputs */
.form-control {
  border-radius: 12px;
}