/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400;1,600&family=Noto+Sans+KR:wght@300;400;500&display=swap');

/* ─── CSS 변수 ─── */
:root {

  /* 배경색 */
  --color-bg-primary:    #0a0a0a;
  --color-bg-secondary:  #111111;
  --color-bg-tertiary:   #1a1a1a;

  /* 골드 포인트 */
  --color-gold:          #c9a84c;
  --color-gold-mid:      #e0c068;
  --color-gold-light:    #f5d98b;
  --color-gold-dim:      rgba(201, 168, 76, 0.25);

  /* 텍스트 */
  --color-text-primary:   #ffffff;
  --color-text-secondary: #cccccc;
  --color-text-muted:     #888888;

  /* 테두리 */
  --color-border:        rgba(201, 168, 76, 0.25);
  --color-border-subtle: rgba(255, 255, 255, 0.07);

  /* 오버레이 */
  --color-overlay-dark:  rgba(0, 0, 0, 0.65);

  /* ─── 폰트 패밀리 ─── */
  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Noto Sans KR', 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 ─── */
  --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;
  --max-width-narrow: 900px;
  --container-pad:    7rem;
  --banner-h:         5rem;

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

/* ─────────────────────────────────────────────
   버튼
───────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 15px 40px;
  font-size: var(--text-lg);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wide);
  transition: var(--transition);
  cursor: pointer;
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-bg-primary);
}
.btn--gold:hover {
  background: var(--color-gold-mid);
}

.btn--outline {
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
}
.btn--outline:hover {
  background: var(--color-gold);
  color: var(--color-bg-primary);
}

.btn--sm {
  padding: 10px 24px;
  font-size: var(--text-2xs);
}

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

html {
  scroll-behavior: smooth;
  font-size: 62.5%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--fw-light);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-body);
}

input, select, textarea {
  font-family: var(--font-body);
}


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

.section-header {
  text-align: center;
  margin-bottom: 8rem;
}

.section-label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-widest);
  color: var(--color-gold);
  margin-bottom: 3.2rem;
}
.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--fw-light);
  line-height: 1.5;
  color: var(--color-text-primary);
}
.section-desc {
  margin-top: 2rem;
  color: var(--color-text-secondary);
  font-weight: var(--fw-light);
  line-height: 1.9;
}

.gold-line {
  width: 50px;
  height: 1px;
  background: var(--color-gold);
  margin: 2.4rem 0;
}

.gold-line--center {
  margin-left: auto;
  margin-right: auto;
}


/* ─────────────────────────────────────────────
   네비게이션
───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: var(--banner-h);
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 25px 0;
  transition: var(--transition);
}

.nav.scrolled {
  padding: 20px 0;
  background: rgba(10, 10, 10, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

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

.nav__logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.nav__logo-en {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  color: var(--color-gold);
  padding-right: 1.5rem;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.nav__link {
  font-size: var(--text-xs);
  font-weight: var(--fw-regular);
  color: var(--color-text-secondary);
  letter-spacing: var(--ls-normal);
}
.nav__link:hover {
  color: var(--color-gold);
}

/* ─────────────────────────────────────────────
   푸터
───────────────────────────────────────────── */
.footer {
  background: rgba(10, 10, 10, 0.9);
  padding: 5rem 0 3rem;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 64px;
  margin-bottom: 40px;
  align-items: start;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  color: var(--color-gold);
  margin-bottom: 0.4rem;
}

.footer__tagline {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: var(--ls-widest);
  color: var(--color-gold);
  margin-bottom: 2.2rem;
  opacity: 0.8;
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.footer__info-item {
  display: flex;
  gap: 5rem;
}
.footer__info-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  min-width: 90px;
  flex-shrink: 0;
  opacity: 0.8;
}
.footer__info-value {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  flex-shrink: 0;
  opacity: 0.8;
}

.footer__contact {
  align-self: end;
  display: flex;
  justify-content: flex-end;
}
.footer__sns {
  display: flex;
  gap: 20px;
}
.footer__sns-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  transition: var(--transition);
  opacity: 0.5;
}
.footer__sns-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  object-fit: contain;
  transition: var(--transition);
  filter: brightness(0) saturate(100%) invert(57%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%);  /* #888888 */
}
.footer__sns-item:hover {
  color: var(--color-gold);
}
.footer__sns-item:hover .footer__sns-icon {
  filter: brightness(0) saturate(100%) invert(72%) sepia(44%) saturate(600%) hue-rotate(5deg) brightness(95%);
}

.footer__bottom {
  padding-top: 30px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer__bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--ls-wide);
}


/* ─────────────────────────────────────────────
   스크롤 리빌 애니메이션
───────────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.85s ease, transform 0.85s ease;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}


/* ─────────────────────────────────────────────
   모바일 반응형
───────────────────────────────────────────── */

.nav__hamburger {
  display: none;
}

/* Laptop 1024px */
@media (max-width: 1024px) {
  .container,
  .nav__container {
    padding: 0 5rem;
  }
  .nav__menu{
    gap: 3rem;
  }
}

/* Tablet 768px */
@media (max-width: 768px) {
  .nav {
    padding: 0;
  }
  .nav.scrolled {
    padding: 0;
  }
  .nav__container {
    padding: 0 3rem;
    height: 7rem;
  }
  .nav__logo-en {
    font-size: 2.8rem;
  }
  .nav__menu {
    gap: 2rem;
  }
  .nav__link {
    font-size: var(--text-2xs);
  }
  .container {
    padding: 0 3rem;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  .footer__logo{
    font-size: 2.8rem;
  }
  .footer__info-label {
  font-size: var(--text-2xs);
  }
  .footer__contact {
    justify-content: flex-start;
  }
  .footer__bottom {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
  .footer__bottom p {
  font-size: var(--text-2xs);  
  }
}

/* 565px */
@media (max-width: 565px) {
  .nav__menu {
    gap: 1.5rem;
  }
}

/* Mobile L 430px */
@media (max-width: 430px) {
  .nav__container {
    padding: 0 2.5rem;
  }

  /* 햄버거 버튼 */
  .nav__hamburger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 10;
  }
  .nav__hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-gold);
    border-radius: 1px;
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
  }
  .nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav__hamburger.open span:nth-child(2) { opacity: 0; }
  .nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* 드롭다운 메뉴 */
  .nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(10, 10, 10, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .nav__menu.open {
    max-height: 40rem;
  }
  .nav__menu li {
    width: 100%;
  }
  .nav__link {
    display: block;
    padding: 1.6rem 2.4rem;
    font-size: var(--text-xs);
    letter-spacing: var(--ls-normal);
    text-transform: uppercase;
    border-bottom: 1px solid var(--color-border-subtle);
  }
  .nav__menu li:last-child .nav__link {
    border-bottom: none;
  }

  .container {
    padding: 0 2.5rem;
  }
}

/* Mobile S 360px */
@media (max-width: 360px) {
  .nav__container,
  .container {
    padding: 0 2rem;
  }
  .footer__info-item {
    display: flex;
    gap: 3rem;
  }
}