/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;900&family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap');

/* ─── CSS 변수 ─── */
:root {

  /* 배경색 */
  --color-bg-primary:    #ffffff;
  --color-bg-secondary:  #f4f6f9;
  --color-bg-dark:       #0a1628;
  --color-bg-darker:     #060e1c;

  /* 포인트 컬러 */
  --color-blue:          #0057a8;
  --color-blue-light:    #1a7fe8;
  --color-blue-dark:     #003d78;
  --color-blue-dim:      rgba(0, 87, 168, 0.12);
  --color-accent:        #00c2e0;

  /* 텍스트 */
  --color-text-primary:  #0a1628;
  --color-text-muted:    #6b7a99;
  --color-text-white:    #ffffff;
  --color-text-light:    rgba(255,255,255,0.75);

  /* 테두리 */
  --color-border:        rgba(0, 87, 168, 0.15);
  --color-border-subtle: rgba(0, 87, 168, 0.07);
  --color-border-white:  rgba(255,255,255,0.15);

  /* 오버레이 */
  --color-overlay-dark:  rgba(6, 14, 28, 0.72);

  /* ─── 폰트 패밀리 ─── */
  --font-en: 'Montserrat', sans-serif;
  --font-ko: 'Noto Sans KR', sans-serif;
  --font-display: 'Sora', 'Pretendard Variable', sans-serif;
  --font-body: 'Pretendard Variable', Pretendard, -apple-system,
               BlinkMacSystemFont, system-ui, sans-serif;

  /* ─── 폰트 크기 (1rem = 10px) ─── */
  --text-2xs:  1.2rem;    /* 12px */
  --text-xs:   1.4rem;    /* 14px */
  --text-sm:   1.6rem;    /* 16px */
  --text-base: 1.8rem;    /* 18px */
  --text-md:   1.8rem;    /* 18px */
  --text-lg:   2rem;      /* 20px */
  --text-xl:   2.4rem;    /* 24px */
  --text-2xl:  3.2rem;    /* 32px */
  --text-3xl:  4rem;      /* 40px */
  --text-4xl:  5.6rem;    /* 56px */
  --text-5xl:  8rem;      /* 80px */
  --text-6xl:  10.4rem;   /* 104px */

  /* ─── 폰트 굵기 ─── */
  --fw-light:    300;
  --fw-regular:  400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     900;

  /* ─── 자간 ─── */
  --ls-widest:  0.3em;
  --ls-wide:    0.15em;
  --ls-normal:  0.05em;

  /* ─── 간격 (1rem = 10px) ─── */
  --space-xs:  0.8rem;    /*  8px */
  --space-sm:  1.6rem;    /* 16px */
  --space-md:  3.2rem;    /* 32px */
  --space-lg:  6.4rem;    /* 64px */
  --space-xl:  9.6rem;    /* 96px */
  --space-2xl: 12.8rem;   /* 128px */
  --space-3xl: 19.2rem;   /* 192px */

  /* ─── 레이아웃 ─── */
  --max-width:     1320px;
  --container-pad: 8rem;
  --banner-h:      5rem;
  --nav-h:         8rem;

  /* ─── 전환 ─── */
  --transition:      all 0.3s ease;
  --transition-slow: all 0.65s ease;

  /* ─── 버튼 ─── */
  --btn-radius: 0.4rem;
}

/* ───── 리셋 ───── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul, ol { list-style: none; }

img {
  max-width: 100%;
  display: block;
}

/* ───── 공통 레이아웃 ───── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ───── 버튼 ───── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.2rem 2.8rem;
  font-family: var(--font-en);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  border-radius: var(--btn-radius);
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn--primary {
  background: var(--color-blue);
  color: var(--color-text-white);
}
.btn--primary:hover {
  background: var(--color-blue-light);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-white);
  border: 1px solid var(--color-border-white);
}
.btn--outline:hover {
  background: var(--color-blue);
  border-color: var(--color-blue);
}

/* ───── 네비게이션 ───── */
.nav {
  position: fixed;
  top: var(--banner-h);
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: var(--transition);
}

.nav.scrolled,
.nav.solid {
  background: rgba(6, 14, 28, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border-white);
}

.nav__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── 텍스트 로고 ─── */
.logo-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  user-select: none;
}
.logo-text__main {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  letter-spacing: 3px;
  color: #1E3A5F;
}
.logo-text__sub {
  font-family: var(--font-display);
  font-weight: var(--fw-light);
  font-size: 1rem;
  letter-spacing: 5px;
  margin-top: 5px;
  color: #8FA8C7;
}
/* 다크 배경(nav, footer) 위에서는 화이트 반전 */
.nav .logo-text__main,
.footer .logo-text__main { color: #FFFFFF; }
.nav .logo-text__sub,
.footer .logo-text__sub { color: rgba(255, 255, 255, 0.65); }

.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 1.6rem;
  font-family: var(--font-ko);
  font-size: 1.5rem;
  font-weight: var(--fw-medium);
  color: rgba(255,255,255,0.9);
  white-space: nowrap;
  transition: var(--transition);
}
.nav__link:hover {
  color: var(--color-accent);
}
.nav__link i {
  display: none;
}

/* 드롭다운 */
.nav__dropdown {
  position: absolute;
  top: calc(100% + 0.8rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 18rem;
  background: rgba(6, 14, 28, 0.97);
  border: 1px solid var(--color-border-white);
  border-radius: 0.4rem;
  padding: 0.8rem 0;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-0.8rem);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav__item:hover .nav__dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: 0.9rem 2rem;
  font-family: var(--font-ko);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
}
.nav__dropdown-link:hover {
  color: var(--color-accent);
  background: rgba(255,255,255,0.05);
}

/* 햄버거 */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.4rem;
  background: none;
  border: none;
}
.nav__hamburger span {
  display: block;
  width: 2.4rem;
  height: 0.2rem;
  background: #fff;
  transition: var(--transition);
  border-radius: 2px;
}
.nav__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(0.5rem, 0.5rem);
}
.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(0.5rem, -0.5rem);
}

/* 모바일 풀스크린 메뉴 */
.nav__mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--color-bg-darker);
  z-index: 999;
  padding: calc(var(--banner-h) + var(--nav-h) + 2rem) var(--container-pad) 4rem;
  overflow-y: auto;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.nav__mobile-overlay.open {
  display: block;
  opacity: 1;
}
.nav__mobile-item {
  border-bottom: 1px solid var(--color-border-white);
}
.nav__mobile-link {
  display: block;
  padding: 2rem;
  font-family: var(--font-ko);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.8);
  font-weight: var(--fw-medium);
}


/* ───── 푸터 ───── */
.footer {
  background: var(--color-bg-darker);
  padding: 8rem var(--container-pad) 4rem;
  width: 100%;
}

/* 상단: 로고 + 네비 */
.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 6rem;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto 4rem;
  padding-bottom: 4.8rem;
  border-bottom: 1px solid var(--color-border-white);
  flex-wrap: wrap;
}

.footer__logo-wrap .logo-text {
  margin-bottom: 1.2rem;
}

.footer__tagline {
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  letter-spacing: var(--ls-wide);
  color: rgba(255,255,255,0.3);
  text-transform: uppercase;
  max-width: 28rem;
  line-height: 1.7;
}

/* 푸터 네비 */
.footer__nav {
  display: flex;
  gap: 6rem;
  flex-wrap: wrap;
}

.footer__nav-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer__nav-title {
  font-family: var(--font-ko);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: rgba(255,255,255,0.65);
  margin-bottom: 0.4rem;
  letter-spacing: var(--ls-normal);
}

.footer__nav-col a {
  font-family: var(--font-ko);
  font-size: var(--text-2xs);
  color: rgba(255,255,255,0.35);
  transition: color 0.2s ease;
}
.footer__nav-col a:hover {
  color: var(--color-accent);
}

/* 중단: 연락처 */
.footer__mid {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto 2.8rem;
  padding-bottom: 3.2rem;
  border-bottom: 1px solid var(--color-border-white);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.footer__contact-row {
  display: flex;
  gap: 3.2rem;
  flex-wrap: wrap;
}

.footer__contact-row span {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}
.footer__contact-row i {
  color: rgba(255, 255, 255, 0.5);
  font-size: 1.2rem;
}

.footer__address {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-ko);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
  line-height: 1.7;
}
.footer__address i {
  color: rgba(255, 255, 255, 0.5);
  font-size: 1.2rem;
  margin-top: 0.2rem;
  flex-shrink: 0;
}

/* 하단: Designed by + 카피라이트 */
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.2rem;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.footer__copy {
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.03em;
}

.footer__designed {
  font-family: var(--font-en);
  font-size: var(--text-2xs);
  color: rgba(255,255,255,0.2);
  letter-spacing: 0.03em;
}

/* ───── 페이지 헤더(배너) ───── */
.page-header {
  width: 100%;
  background: linear-gradient(135deg, #060e1c, #0d2b52);
  padding: calc(var(--banner-h) + var(--nav-h) + var(--space-lg)) 0 var(--space-lg);
}

.page-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* 브레드크럼 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: var(--space-md);
  font-family: var(--font-ko);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}
.breadcrumb a {
  color: rgba(255,255,255,0.45);
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--color-accent);
}
.breadcrumb i {
  font-size: 1rem;
  color: rgba(255,255,255,0.3);
}
.breadcrumb__current {
  color: rgba(255,255,255,0.85);
}

.page-header__eyebrow {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.page-header__title {
  font-family: var(--font-display);
  font-size: 4.5rem;
  font-weight: var(--fw-semibold);
  color: #fff;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.page-header__desc {
  font-family: var(--font-ko);
  font-size: var(--text-base);
  font-weight: var(--fw-light);
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

/* ───── 스크롤 리빌 애니메이션 ───── */
.reveal {
  opacity: 0;
  transform: translateY(2.4rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ───── 모바일 반응형 ───── */

/* Laptop 1024px */
@media (max-width: 1024px) {
  :root {
    --container-pad: 6rem;
  }
  html { font-size: 56.25%; }

  .footer { padding: 6rem var(--container-pad) 4rem; }
  .footer__nav { gap: 4rem; }
}

/* Tablet 768px */
@media (max-width: 768px) {
  :root {
    --container-pad: 4rem;
  }
  html { font-size: 50%; }

  .nav__menu { display: none; }
  .nav__hamburger { display: flex; }

  .footer__top { flex-direction: column; gap: 3.2rem; }
  .footer__nav { display: none; }
  .footer__contact-row { gap: 2rem; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 1.6rem; }
}

/* Mobile L 430px */
@media (max-width: 430px) {
  :root {
    --container-pad: 2.4rem;
  }
  html { font-size: 43.75%; }

  .footer { padding: 4.8rem var(--container-pad) 3.2rem; }

  .page-header__title {
    font-size: var(--text-3xl);
  }
}

/* Mobile S 360px */
@media (max-width: 360px) {
  :root {
    --container-pad: 2rem;
  }
  html { font-size: 37.5%; }
}



/* Mobile L 430px — 로고 축소 */
@media (max-width: 430px) {
  .logo-text__main { font-size: 20px; letter-spacing: 2.3px; }
  .logo-text__sub { font-size: 7px; letter-spacing: 4.2px; margin-right: -4.2px; }
}