*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --primary: #1db8a8;
  --primary-dark: #159183;
  --secondary: #15a8c9;
  --text: #16222f;
  --text-body: #35434f;
  --text-secondary: #64748b;
  --bg: #f6faf9;
  --surface: #ffffff;
  --border: #e2edeb;
  --border-strong: #cfe3e0;
  --tint: #e9f6f4;
  --font: "Pretendard Variable", "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", sans-serif;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(180deg, #eef7f5 0%, var(--bg) 320px);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
}
.header {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 14px 0;
}
.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.logo img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}
.header-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.header-nav a:hover {
  color: var(--primary-dark);
}
.header-nav a.nav-download {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.85rem;
}
.header-nav a.nav-download:hover {
  color: #fff;
  opacity: 0.9;
}
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 44px 24px 80px;
}
.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--primary-dark);
}
.page-title {
  font-size: 1.95rem;
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding-bottom: 26px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-strong);
}
.category-chip {
  display: inline-block;
  background: var(--tint);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 100px;
}
.meta-dot::before {
  content: "\B7";
  margin: 0 2px;
  color: var(--border-strong);
}
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  margin-bottom: 40px;
}
.toc-title {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--primary-dark);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.toc ol {
  list-style: none;
  counter-reset: toc;
}
.toc li {
  counter-increment: toc;
  margin: 6px 0;
}
.toc a {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--text-body);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
}
.toc a:hover {
  color: var(--primary-dark);
}
article h2 {
  position: relative;
  font-size: 1.32rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 52px 0 16px;
  padding-left: 16px;
  scroll-margin-top: 84px;
}
article h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.32em;
  width: 5px;
  height: 1.05em;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--primary), var(--secondary));
}
article h3 {
  font-size: 1.06rem;
  font-weight: 700;
  margin: 30px 0 10px;
}
article p {
  font-size: 1.01rem;
  margin-bottom: 16px;
  color: var(--text-body);
}
article ul,
article ol {
  margin: 0 0 18px 4px;
  padding-left: 20px;
  color: var(--text-body);
}
article li {
  font-size: 1.01rem;
  margin-bottom: 8px;
  padding-left: 4px;
}
article li::marker {
  color: var(--primary);
  font-weight: 700;
}
article strong {
  color: var(--text);
  font-weight: 700;
  background: linear-gradient(transparent 68%, rgba(29, 184, 168, 0.18) 68%);
}
article a {
  color: var(--primary-dark);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(29, 184, 168, 0.4);
  text-underline-offset: 3px;
}
article a:hover {
  text-decoration-color: var(--primary-dark);
}
.table-scroll {
  overflow-x: auto;
  margin: 20px 0 26px;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(22, 34, 47, 0.04);
}
article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
  background: var(--surface);
}
article th {
  background: var(--tint);
  color: var(--primary-dark);
  font-weight: 700;
  text-align: left;
  padding: 12px 16px;
  white-space: nowrap;
}
article td {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  vertical-align: top;
  color: var(--text-body);
}
article tbody tr:nth-child(even) td {
  background: #fafdfc;
}
.tip-box {
  display: flex;
  gap: 14px;
  background: linear-gradient(135deg, rgba(29, 184, 168, 0.07), rgba(21, 168, 201, 0.05));
  border: 1px solid rgba(29, 184, 168, 0.25);
  border-radius: 14px;
  padding: 18px 22px;
  margin: 26px 0;
  font-size: 0.96rem;
  color: var(--text-body);
}
.tip-box::before {
  content: "\1F4A1";
  font-size: 1.15rem;
  line-height: 1.7;
}
.tip-box strong {
  color: var(--primary-dark);
  background: none;
}
.cta-box {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 20px;
  padding: 38px 32px;
  margin: 56px 0 8px;
  color: #fff;
  text-align: center;
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-box h2 {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 0 10px;
  color: #fff;
}
.cta-box p {
  font-size: 0.95rem;
  opacity: 0.94;
  margin: 0 auto 22px;
  max-width: 480px;
  color: #fff;
}
.cta-box .cta-btns {
  position: relative;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  z-index: 1;
}
.cta-box a {
  display: inline-block;
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 30px;
  border-radius: 100px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
  transition: transform 0.15s;
}
.cta-box a:hover {
  transform: translateY(-2px);
}
.related {
  margin-top: 44px;
}
.related h2 {
  font-size: 1.02rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}
.related ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.related a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 15px 20px;
  color: var(--text);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.related a::after {
  content: "\2192";
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
}
.related a:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 14px rgba(29, 184, 168, 0.1);
}
.index-hero {
  text-align: center;
  padding: 16px 0 8px;
  margin-bottom: 34px;
}
.index-hero h1 {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 12px;
}
.index-hero h1 .accent {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.index-hero p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 460px;
  margin: 0 auto;
}
.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  margin: 36px 0 14px;
}
.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-strong);
}
.guide-list {
  list-style: none;
  display: grid;
  gap: 12px;
}
.guide-card {
  display: block;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 26px;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.guide-card:hover {
  border-color: var(--primary);
  box-shadow: 0 10px 26px rgba(29, 184, 168, 0.12);
  transform: translateY(-2px);
}
.guide-card .card-top {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}
.guide-card h2 {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin: 0 0 6px;
}
.guide-card p {
  font-size: 0.89rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.65;
}
.guide-card .read-more {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary-dark);
}
.guide-card .read-more::after {
  content: " \2192";
}
.footer {
  text-align: center;
  padding: 36px 24px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.footer a {
  color: var(--text-secondary);
  text-decoration: none;
  margin: 0 8px;
}
.footer a:hover {
  color: var(--primary-dark);
}
.footer p + p {
  margin-top: 6px;
}
@media (max-width: 560px) {
  .container {
    padding: 32px 20px 64px;
  }
  .page-title {
    font-size: 1.5rem;
  }
  .index-hero h1 {
    font-size: 1.7rem;
  }
  article h2 {
    font-size: 1.18rem;
    margin-top: 42px;
  }
  article p,
  article li {
    font-size: 0.97rem;
  }
  .header-nav {
    gap: 14px;
  }
  .header-nav a.nav-download {
    padding: 7px 14px;
  }
  .cta-box {
    padding: 30px 22px;
  }
}