@import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css");

/* ============================================================ 페이로 결제지식 — 라이트 테마 */
:root {
  --ink: #102338;
  --navy: #07182f;
  --blue: #2478e7;
  --blue-dark: #145fc8;
  --sky: #eaf4ff;
  --mint: #e9faf6;
  --line: #dbe4ed;
  --muted: #64748b;
  --bg: #f7faff;
  --surface: #ffffff;
  --surface-2: #f1f7fe;
  --text: #102338;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  line-height: 1.75;
  letter-spacing: -.02em;
  word-break: keep-all;
  overflow-wrap: break-word;
}

a { color: inherit; }
img { max-width: 100%; }

/* ---------------------------------------------------------- 상단 내비게이션 */
.kb-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
}

.kb-nav__inner {
  width: min(var(--max), calc(100% - 32px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.kb-brand {
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: -.05em;
}

.kb-brand span { color: var(--blue); }

.kb-nav__links {
  display: flex;
  align-items: center;
  gap: 20px;
  color: #526176;
  font-size: 13px;
  font-weight: 700;
}

.kb-nav__links a { text-decoration: none; }
.kb-nav__links a:hover,
.kb-nav__links a:focus-visible { color: var(--blue); }

.kb-phone {
  padding: 8px 13px;
  border-radius: 7px;
  background: var(--blue);
  color: #fff !important;
  font-weight: 800;
}

/* ---------------------------------------------------------- 허브 히어로 */
.kb-hero {
  padding: 82px 20px 66px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(circle at 84% 22%, rgba(83, 170, 255, .22), transparent 34%),
    linear-gradient(118deg, #f7fbff 0%, #eaf4ff 62%, #e6f2ff 100%);
}

.kb-hero__inner { width: min(var(--max), 100%); margin: 0 auto; }

.kb-eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .12em;
}

.kb-hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(38px, 6vw, 62px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.07em;
}

.kb-hero h1 span { color: var(--blue); }

.kb-hero__inner > p:not(.kb-eyebrow) {
  max-width: 680px;
  margin: 20px 0 0;
  color: #5d7188;
  font-size: 17px;
  line-height: 1.85;
}

.kb-hero__stats { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 28px; }

.kb-hero__stats span,
.kb-hero__stats a {
  padding: 9px 13px;
  border: 1px solid #cfe1f5;
  border-radius: 7px;
  background: rgba(255, 255, 255, .86);
  color: #35506b;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.kb-hero__stats strong { color: var(--blue); }
.kb-hero__stats a:hover { border-color: var(--blue); color: var(--blue); }

/* ---------------------------------------------------------- 섹션 */
.kb-section { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 62px 0; }

.kb-section--light {
  width: 100%;
  padding-inline: max(16px, calc((100% - var(--max)) / 2));
  border-top: 1px solid var(--line);
  background: #fff;
}

.kb-section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 26px;
}

.kb-section__head h2 { margin: 0; font-size: 29px; font-weight: 900; letter-spacing: -.05em; }
.kb-section__head > p { margin: 0; color: var(--muted); font-size: 13px; }

/* ---------------------------------------------------------- 카테고리 허브 */
.kb-category-hero {
  padding: 70px 16px 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(118deg, #f7fbff, #eaf4ff);
}

.kb-category-hero > div { width: min(var(--max), 100%); margin: 0 auto; }
.kb-category-hero h1 { margin: 8px 0 12px; font-size: 42px; font-weight: 900; letter-spacing: -.06em; }
.kb-category-hero p:last-child { margin: 0; color: var(--muted); font-size: 15px; }

.kb-main,
.kb-article-wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 60px 0 96px; }

.kb-breadcrumb { margin: 0 0 28px; color: #8a9aaf; font-size: 13px; }
.kb-breadcrumb a { text-decoration: none; }
.kb-breadcrumb a:hover { color: var(--blue); }
.kb-breadcrumb span { margin: 0 8px; }

/* ---------------------------------------------------------- 클러스터 카드 */
.kb-cluster-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 68px;
}

.kb-cluster-card {
  min-height: 148px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.kb-cluster-card:hover,
.kb-cluster-card:focus-visible {
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(36, 120, 231, .1);
  outline: none;
}

.kb-cluster-card span { color: var(--blue); font-size: 12px; font-weight: 900; }
.kb-cluster-card strong { margin-top: 14px; font-size: 18px; font-weight: 900; letter-spacing: -.04em; }
.kb-cluster-card small { margin-top: auto; padding-top: 12px; color: var(--muted); font-size: 12px; }

/* ---------------------------------------------------------- 글 카드 */
.kb-post-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }

.kb-post-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.kb-post-card:hover { border-color: #b9d3f0; box-shadow: 0 14px 30px rgba(16, 35, 56, .08); }

.kb-post-card > a { display: block; height: 100%; text-decoration: none; }
.kb-post-card img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform .3s ease;
}
.kb-post-card:hover img { transform: scale(1.02); }
.kb-post-card__body { padding: 18px; }
.kb-post-card__body p { margin: 0; color: var(--blue); font-size: 11px; font-weight: 900; }
.kb-post-card__body h2 { margin: 10px 0 16px; font-size: 17px; line-height: 1.48; font-weight: 800; letter-spacing: -.035em; }
.kb-post-card__body time { color: var(--muted); font-size: 11px; }

.kb-post-card[hidden] { display: none; }

/* ---------------------------------------------------------- 페이지네이션 */
.kb-pagination {
  min-height: 44px;
  margin-top: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  flex-wrap: wrap;
}

.kb-pagination button {
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.kb-pagination button:hover:not(:disabled),
.kb-pagination button:focus-visible { border-color: var(--blue); outline: none; }

.kb-pagination button.is-active { border-color: var(--blue); background: var(--blue); color: #fff; }
.kb-pagination button:disabled { color: #a8b4c1; cursor: not-allowed; }

.kb-empty {
  padding: 40px;
  border: 1px dashed #c3d5e8;
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

/* ---------------------------------------------------------- 문서 페이지 */
.kb-article-wrap { max-width: 880px; }

.kb-article-header { margin-bottom: 32px; }

.kb-article-header h1 {
  margin: 12px 0 18px;
  font-size: clamp(32px, 5.4vw, 50px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.06em;
}

.kb-article-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; color: #8a9aaf; font-size: 13px; }

.kb-article-hero {
  width: 100%;
  height: auto;
  margin: 0 0 34px;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: block;
}

.kb-answer {
  margin: 0 0 26px;
  padding: 22px;
  border-left: 4px solid var(--blue);
  border-radius: 0 12px 12px 0;
  background: var(--sky);
  color: #1b334d;
  font-size: 17px;
}

.kb-summary {
  margin: 0 0 40px;
  padding: 22px;
  border: 1px solid #bfe6d6;
  border-radius: 12px;
  background: var(--mint);
}

.kb-summary strong { color: #0f766e; }
.kb-summary ol { margin: 12px 0 0; padding-left: 22px; }
.kb-summary li { color: #23544a; }

.kb-article h2 {
  margin: 54px 0 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 27px;
  font-weight: 900;
  letter-spacing: -.05em;
  line-height: 1.36;
}

.kb-article h3 { margin: 30px 0 10px; font-size: 20px; font-weight: 900; letter-spacing: -.04em; }
.kb-article p { color: #40556d; }
.kb-article strong { color: var(--ink); }

.kb-article table {
  width: 100%;
  margin: 24px 0;
  border-collapse: collapse;
  background: var(--surface);
  font-size: 14px;
}

.kb-article th,
.kb-article td { padding: 13px 14px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
.kb-article th { background: var(--surface-2); color: var(--ink); font-weight: 800; }
.kb-article td { color: #40556d; }

.kb-checklist,
.kb-steps {
  padding: 22px 22px 22px 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.kb-checklist li,
.kb-steps li { margin: 8px 0; color: #40556d; }

.kb-faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.kb-faq summary { cursor: pointer; color: var(--ink); font-weight: 800; }
.kb-faq details p { margin: 12px 0 0; }

.kb-sources { margin-top: 52px; padding: 22px; border-radius: 12px; background: var(--surface-2); }
.kb-sources h2 { margin-top: 0; border-top: 0; padding-top: 0; }
.kb-sources li { margin: 10px 0; color: #40556d; font-size: 13px; }
.kb-sources a { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 3px; }

.kb-related { margin-top: 38px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }

.kb-related a {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
}

.kb-related a:hover { border-color: var(--blue); color: var(--blue); }

/* ---------------------------------------------------------- 푸터 */
.kb-footer {
  padding: 40px 20px 104px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  text-align: center;
  font-size: 12.5px;
}

.kb-footer a { color: #35506b; font-weight: 700; }
.kb-footer a:hover { color: var(--blue); }
.kb-footer p { margin: 8px 0; }

/* ---------------------------------------------------------- 반응형 */
@media (max-width: 900px) {
  .kb-cluster-grid,
  .kb-post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kb-nav__links a:not(.kb-phone) { display: none; }
}

@media (max-width: 620px) {
  .kb-nav__inner { width: calc(100% - 24px); }
  .kb-brand { font-size: 15px; }
  .kb-phone { font-size: 12px; padding: 7px 10px; }
  .kb-hero { padding: 58px 16px 48px; }
  .kb-hero h1 { font-size: 36px; }
  .kb-hero__inner > p:not(.kb-eyebrow) { font-size: 15px; }
  .kb-main,
  .kb-article-wrap { width: calc(100% - 24px); padding-top: 44px; }
  .kb-cluster-grid,
  .kb-post-grid,
  .kb-related { grid-template-columns: 1fr; }
  .kb-section__head { align-items: flex-start; flex-direction: column; gap: 10px; }
  .kb-category-hero h1 { font-size: 32px; }
  .kb-article-header h1 { font-size: 30px; }
  .kb-article h2 { font-size: 23px; }
  .kb-article table { display: block; overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}