/* --------------------
   기본 스타일
-------------------- */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f9fbff;
}

header {
  color: #fff;
  text-align: center;
  padding-bottom: 40px;
}

/* --------------------
   Navbar
-------------------- */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: #ffffff;
  position: relative;
  z-index: 100;
  border-bottom: 1px solid #eaeaea;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.logo {
  width: 180px;
  height: auto;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: #333;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #145bb5;
}

/* 햄버거 버튼 */
.menu-toggle {
  display: none;
  font-size: 1.8rem;
  background: none;
  border: none;
  cursor: pointer;
  color: #333;
}

.nav-links.active {
  display: flex;
}

/* --------------------
   탭 & 박스
-------------------- */
h1,h2,h3 {
  margin:20px 0 10px;
}

.section {
  padding:40px 20px;
  max-width:1100px;
  margin:0 auto;
}

.tabs {
  display:flex;
  gap:4px;
  margin:20px 0;
  border-bottom:2px solid #eee;
}

.tab {
  flex:1;
  text-align:center;
  padding:12px;
  border:1px solid #eee;
  border-bottom:none;
  border-radius:6px 6px 0 0;
  background:#f8f8f8;
  font-size:14px;
  cursor:pointer;
  transition:background 0.2s,color 0.2s;
}

.tab.active {
  background:#0a5ff0;
  color:#fff;
  font-weight:600;
}

.content {
  display:none;
}

.content.active {
  display:block;
}

.box {
  background:#fafafa;
  border:1px solid #eee;
  border-radius:8px;
  padding:24px;
  margin:16px auto;
  width:100%;
  max-width:900px;
  height:300px;
  box-sizing:border-box;
  overflow-y:auto;
}

.box h3 {
  margin-top:0;
}

.pay_ul {
  padding-left:20px;
}

.pay_ul li {
  margin-bottom:6px;
}

.circle-steps {
  display:flex;
  justify-content:space-around;
  margin-top:40px;
  flex-wrap:wrap;
  gap:20px;
}

.circle {
  flex:1;
  min-width:200px;
  max-width:250px;
  text-align:center;
}

.circle div {
  width:160px;
  height:160px;
  margin:0 auto;
  border:2px dashed #0a5ff0;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:600;
  color:#444;
  text-align:center;
  padding:10px;
  line-height:1.4;
}

/* --------------------
   Footer
-------------------- */
footer {
  background:#f6f6f6;
  padding:32px 20px;
  color:#444;
  font-size:13px;
  margin-top:40px;
}

footer .footer-top {
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:20px;
}

footer .footer-bottom {
  margin-top:20px;
  text-align:center;
  font-size:12px;
  color:#777;
}

footer img {
  height:28px;
  margin-right:8px;
  vertical-align:middle;
}

/* --------------------
   반응형
-------------------- */

/* 태블릿 (1024px 이하) */
@media (max-width:1024px) {
  .section {
    padding:30px 15px;
  }
  .box {
    height:250px;
  }
  .circle-steps {
    gap:15px;
  }
}

/* 모바일 (768px 이하) */
@media (max-width:768px) {
  .navbar {
    flex-wrap:wrap;
  }

  .menu-toggle {
    display:block;
  }

  .nav-links {
    display:none;
    flex-direction:column;
    gap:10px;
    position:absolute;
    top:70px;
    right:20px;
    background:#fff;
    padding:1rem 1.5rem;
    border:1px solid #ddd;
    border-radius:8px;
    box-shadow:0 2px 6px rgba(0,0,0,0.15);
  }

  .nav-links.active {
    display:flex;
  }

  .tabs {
    flex-direction:column;
  }
  .tab {
    max-width:100%;
  }

  .section {
    padding:25px 10px;
  }

  .box {
    height:auto;
    padding:16px;
  }

  .circle div {
    width:120px;
    height:120px;
    font-size:14px;
  }
  .circle {
    min-width:150px;
    max-width:200px;
  }
}

/* 모바일 소형 (480px 이하) */
@media (max-width:480px) {
  .section {
    padding:20px 5px;
  }

  .box {
    padding:12px;
  }

  .circle div {
    width:100px;
    height:100px;
    font-size:12px;
  }

  .circle {
    min-width:120px;
    max-width:150px;
  }
}