:root {
  --content-max-width: 1400px;

  /* 섹션 세로 패딩 — 화면폭에 따라 가변 */
  --pad-section-sm: clamp(64px, 8vw, 88px);     /* 기존 52~72px */
  --pad-section: clamp(76px, 9vw, 104px);       /* 기존 60~88px */
  --pad-section-lg: clamp(88px, 10vw, 128px);   /* 기존 68~104px */
  --pad-hero: clamp(96px, 11vw, 144px);         /* 기존 80~120px */

  --color-purple-900: #26215C;
  --color-purple-600: #534AB7;
  --color-purple-200: #AFA9EC;
  --color-purple-tint-text: #CECBF6;
  --color-purple-bg-light: #F3F2FC;

  /* 액센트 — 로고 시안 */
  --color-accent: #0ACDE4;
  --color-accent-deep: #056A76;

  /* 타입 스케일 — 본문 17px 기준, 디스플레이는 화면폭에 따라 가변 */
  --fs-xs: 13px;
  --fs-sm: 15px;
  --fs-base: 17px;
  --fs-md: 20px;
  --fs-lg: clamp(20px, 2.2vw, 24px);
  --fs-xl: clamp(24px, 3vw, 30px);
  --fs-2xl: clamp(27px, 3.9vw, 36px);
  --fs-3xl: clamp(30px, 4.6vw, 44px);

  --color-white: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-secondary: #5F5E5A;
  --color-border: #E5E5E5;
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--color-text);
  font-size: var(--fs-base);
  line-height: 1.6;
  min-width: 320px;
  padding-top: 80px; /* 고정 헤더 높이만큼 확보 (14+50+14+1px 테두리) */
}

/* 헤더 */
/* 헤더 (화면 상단에 고정, 항상 화이트 배경) */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 14px 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo__img {
  height: 50px;
  width: auto;
  display: block;
}
/* 햄버거 버튼 (기본은 데스크톱에서 숨김) */
.header__menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

.header__menu-btn span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.2s, opacity 0.2s;
}

.header__menu-btn.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__menu-btn.is-active span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 모바일 드롭다운 nav */
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.mobile-nav.is-open {
  max-height: 400px;
}

.mobile-nav a {
  padding: 14px 24px;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}
.nav {
  display: flex;
  gap: 24px;
}

.nav a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--fs-sm);
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav a:hover {
  color: var(--color-purple-600);
}

/* 현재 보고 있는 페이지 */
.nav a.is-active {
  color: var(--color-purple-600);
  border-bottom-color: var(--color-purple-600);
}

/* 푸터 */
.footer {
  padding: 28px 24px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
}

.footer__inner a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer__inner a:hover {
  color: var(--color-purple-600);
}

@media (max-width: 768px) {
  .header__inner .nav {
    display: none;
  }
  .header__menu-btn {
    display: flex;
  }
}