/* ─── CSS 변수 ─── */
:root {

  /* 배경색 */
  --color-bg-primary:    #0A0A0A;
  --color-bg-secondary:  #111111;
  --color-bg-tertiary:   #1A1A1A;

  /* 포인트 컬러 */
  --color-red:           #a51f1f;
  --color-red-dark:      #df2825;
  --color-red-dim:       rgba(255, 69, 0, 0.15);

  /* 텍스트 */
  --color-text-primary:   #FFFFFF;
  --color-text-secondary: #CCCCCC;
  --color-text-muted:     #888888;

  /* 테두리 */
  --color-border:        rgba(255, 69, 0, 0.3);
  --color-border-subtle: rgba(255, 255, 255, 0.07);

  /* 오버레이 */
  --color-overlay-dark:  rgba(0, 0, 0, 0.55);

  /* 폰트 패밀리 */
  --font-heading: 'Barlow Condensed', sans-serif;
  --font-body:    'Barlow', 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:     700;
  --fw-black:    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;
  font-family: var(--font-heading);
  font-size: var(--text-md);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  line-height: 1;
}
.btn--kakao {
  background: #FEE500;
  color: #191919;
  font-weight: var(--fw-bold);
}
.btn--kakao:hover {
  background: #F5D800;
  transform: translateY(-3px);
}


/* ─────────────────────────────────────────────
   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-base);
  font-weight: var(--fw-regular);
  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 v
───────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section-header {
  text-align: center;
  margin-bottom: 10rem;
}
.section-label {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-widest);
  color: var(--color-red);
  margin-bottom: 3rem;
}
.section-title {
  font-family: var(--font-heading);
  font-size: 4.5rem;
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  margin-bottom: 2rem;
  color: var(--color-text-primary);
}
.section-desc {
  margin-top: 2rem;
  color: var(--color-text-secondary);
  font-size: var(--text-md);
  font-weight: var(--fw-regular);
  line-height: 2;
}
.red-line {
  width: 5rem;
  height: 0.3rem;
  background: var(--color-red);
  margin: 4rem 0;
}
.red-line--center {
  margin-left: auto;
  margin-right: auto;
}


/* ─────────────────────────────────────────────
   네비게이션 v
───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: var(--banner-h);
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 2.5rem 0;
  transition: var(--transition-slow);
}

.nav.scrolled {
  padding: 1.5rem 0;
  background: rgba(10, 10, 10, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  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-wrap {
  position: relative;
  display: inline-block;
  line-height: 1;
}
.nav__logo-target {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  user-select: none;
}

.nav__logo {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-normal);
  color: var(--color-red);
  text-transform: uppercase;
  line-height: 1;
}
.nav__logo span {
  color: var(--color-text-primary);
  opacity: 0.5; 
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4rem;
}
.nav__link {
  font-family: var(--font-heading);
  font-size: var(--text-md);
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}
.nav__link:hover {
  color: var(--color-red);
}


/* ─────────────────────────────────────────────
   푸터 v
───────────────────────────────────────────── */
.footer {
  background: #050505;
  padding: 5rem 0 3rem;
  border-top: 1px solid var(--color-border-subtle);
}

.footer__inner {
  display: grid;
  grid-template-columns: 3fr 1fr;
  margin-bottom: 3rem;
  align-items: end;
}

.footer__logo {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--fw-black);
  letter-spacing: var(--ls-normal);
  color: var(--color-red);
  margin-bottom: 1.6rem;
  text-transform: uppercase;
}
.footer__logo span {
  color: var(--color-text-primary);
  opacity: 0.5; 
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.footer__info-item {
  display: flex;
  gap: 2.5rem;
}
.footer__info-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  min-width: 8rem;
  flex-shrink: 0;
}
.footer__info-value {
  font-size: var(--text-xs);
  color: var(--color-text-muted);

}
.footer__socials {
  display: flex;
  gap: 1.6rem;
  align-items: center;
}
.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  border: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
  font-size: var(--text-lg);
  transition: var(--transition);
  border-radius: 5px;
}
.footer__social-link:hover {
  border-color: var(--color-red);
  color: var(--color-red);
  transform: translateY(-3px);
}


.footer__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-end;
}

.footer__bottom {
  padding-top: 3rem;
  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-normal);
}


/* ─────────────────────────────────────────────
   스크롤 리빌 애니메이션
───────────────────────────────────────────── */
[data-reveal] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

[data-reveal="left"] {
  transform: translateX(-40px);
}

[data-reveal="right"] {
  transform: translateX(40px);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translate(0, 0);
}


/* ─────────────────────────────────────────────
   모바일 반응형
───────────────────────────────────────────── */
.nav__hamburger {
  display: none;
}

/* Laptop 1024px */
@media (max-width: 1024px) {
  
  /* 네비게이션 v */
  .container,
  .nav__container {
    padding: 0 5rem;
  }
  .nav__logo {
    font-size: 3.5rem;
  }
  .nav__menu {
    gap: 2.4rem;
  }
  .nav__link {
    font-size: var(--text-sm);  
  }
  /* 푸터 */
  .footer{
    padding: 4rem 0 3rem;
  }
  .footer__inner {
    margin-bottom: 2rem;
  }
  .footer__bottom {
    padding-top: 2rem;
  }
}

/* Tablet 768px */
@media (max-width: 768px) {
  
  /* 네비게이션 v */
  .nav {
    padding: 0;
  }
  .nav.scrolled {
    padding: 0;
  }
  .nav__container {
    padding: 0 4rem;
    height: 7rem;
  }
  .nav__logo {
    font-size: 3rem;
  }
  .nav__menu {
    gap: 1.4rem;
  }
  .nav__link {
    font-size: var(--text-xs);  
    letter-spacing: var(--ls-normal);
  }

  .container {
    padding: 0 3rem;
  }

/* 푸터 */
  .footer__logo {
  font-size: var(--text-2xl);
  }
  .footer__info-item {
    gap: 1rem;
  }
  .footer__info-label, .footer__info-value, .footer__bottom p {
    font-size: var(--text-2xs);
  }
  .footer__info-label {
    min-width: 7rem;
  }
  .footer__socials {
    gap: 1.2rem;
  }
  .footer__social-link {
    width: 3.5rem;
    height: 3.5rem;
    font-size: var(--text-md);
  }
  .footer__bottom {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
}

/* Tablet 520px */
@media (max-width: 520px) {

  /* 네비게이션 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: 22px;
    height: 2px;
    background: var(--color-text-primary);
    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(5, 5, 5, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .nav__menu.open {
    max-height: 50rem;
  }
  .nav__menu li {
    width: 100%;
  }
  .nav__link {
    display: block;
    padding: 1.5rem 2.4rem;
    border-bottom: 1px solid var(--color-red-dim);
    text-align: center;
  }
}

/* Mobile L 430px */
@media (max-width: 430px) {

  .nav__container {
    padding: 0 3rem;
  }

  .container {
    padding: 0 2.5rem;
  }
  .footer{
    padding: 3rem 0 2rem;
  }
  .footer__inner {
    margin-bottom: 1.5rem;
  }
  .footer__bottom {
    padding-top: 1.5rem;
  }
  .footer__logo {
    font-size: 2.8rem;
  }
  .footer__socials {
    gap: 0.8rem;
    flex-direction: column;
  }
  .footer__bottom {
    gap: 0.5rem;
  }
}

/* Mobile S 360px */
@media (max-width: 360px) {

}