/* Noto Sans KR 폰트 불러오기 */
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;700;900&display=swap");

/* === 0. Reset & Defaults (신규 추가) === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* === 1. 기본 및 공통 스타일 === */
body {
  font-family: "Noto Sans KR", sans-serif;
  margin: 0;
  padding: 0;
  background-color: #121212;
  color: #e0e0e0;
  line-height: 1.8;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

section {
  padding: 80px 0;
}

h1,
h2,
h3 {
  color: #ffffff;
  letter-spacing: -1px;
  font-weight: 900;
}

h1 {
  font-size: 3.5em;
}
h2 {
  font-size: 2.5em;
  text-align: center;
  margin-bottom: 60px;
}
h3 {
  font-size: 1.6em;
}

p {
  font-size: 1.1em;
  color: #bdbdbd;
}

.highlight {
  color: #00a9ff;
  font-weight: 700;
}

/* === 2. 재사용 컴포넌트 (버튼, 카드 등) === */
.btn {
  display: inline-block;
  padding: 12px 30px;
  font-size: 1em;
  font-weight: 700;
  text-decoration: none;
  border-radius: 50px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: #00a9ff;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #0086cc;
  transform: translateY(-3px);
}

.btn-secondary {
  background-color: transparent;
  color: #e0e0e0;
  border: 2px solid #555;
}

.btn-secondary:hover {
  background-color: #e0e0e0;
  color: #121212;
  border-color: #e0e0e0;
}

/* === 3. 네비게이션 및 푸터 (모든 페이지 공통) === */
header {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  background-color: rgba(18, 18, 18, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #2a2a2a;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

nav .logo {
  font-size: 1.5em;
  font-weight: 900;
  color: #ffffff;
  text-decoration: none;
}

nav .nav-links a {
  color: #e0e0e0;
  text-decoration: none;
  margin-left: 30px;
  font-weight: 700;
  transition: color 0.3s ease;
}

nav .nav-links a:hover {
  color: #00a9ff;
}

nav .nav-cta {
  background-color: #00a9ff;
  color: #ffffff;
  padding: 8px 20px;
  border-radius: 20px;
}

nav .nav-cta:hover {
  color: #ffffff;
  background-color: #0086cc;
}

footer {
  background-color: #1a1a1a;
  text-align: center;
  padding: 40px 20px;
  font-size: 0.9em;
  color: #757575;
  border-top: 1px solid #2a2a2a;
}
footer strong {
  color: #bdbdbd;
}

/* === 4. 페이지별 스타일 === */

/* --- 메인 페이지 (index.html) --- */
.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
  color: #fff;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.8)),
    url("https://images.unsplash.com/photo-1520467795206-62e33627e6ce?q=80&w=1887&auto=format&fit=crop")
      no-repeat center center;
  background-size: cover;
}

.hero .hero-content {
  max-width: 800px;
}
.hero p {
  font-size: 1.3em;
  color: #cfd8dc;
  margin-bottom: 40px;
}
.hero .cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  text-align: center;
}
.feature-item {
  padding: 20px;
}
.feature-item .icon {
  font-size: 3em;
  color: #00a9ff;
}
.feature-item h3 {
  margin-top: 20px;
}

.b2b-promo {
  background-color: #1a1a1a;
  padding: 80px 0;
  text-align: center;
}

/* --- 제휴 페이지 (partnership.html) --- */
.page-header {
  padding-top: 150px;
  padding-bottom: 80px;
  text-align: center;
  background-color: #1a1a1a;
}
.benefit-item,
.process-item {
  background-color: #1e1e1e;
  padding: 30px;
  border-radius: 8px;
  border-left: 5px solid #00a9ff;
  margin-bottom: 20px;
}
.models {
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}
.model-card {
  background-color: #1e1e1e;
  padding: 30px;
  border-radius: 8px;
  width: 300px;
  text-align: center;
  border-top: 5px solid #00a9ff;
}
.model-card .price {
  font-size: 1.2em;
  color: #00a9ff;
  font-weight: 700;
}

/* --- 갤러리 페이지 (gallery.html) --- */
.gallery-grid {
  columns: 4 250px;
  column-gap: 15px;
}
.gallery-grid img {
  width: 100%;
  margin-bottom: 15px;
  border-radius: 8px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 30px rgba(0, 169, 255, 0.4);
}

/* --- 소개 페이지 (about.html) --- */
.vision-section {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-top: 60px;
}
.team-card {
  background-color: #1a1a1a;
  padding: 30px;
  text-align: center;
  border-radius: 8px;
}
.team-card img {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid #00a9ff;
}
.team-card h3 {
  margin-top: 20px;
}
.team-card .role {
  color: #00a9ff;
  font-weight: 700;
}

/* === (신규 추가) 5. 모바일 네비게이션 === */

/* 접근성을 위한 스크린 리더 전용 클래스 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mobile-nav-toggle {
  display: none; /* 데스크탑에서는 숨김 */
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
  z-index: 1001; /* 메뉴보다 위에 있도록 */
}

.mobile-nav-toggle .icon-bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: #ffffff;
  margin: 5px 0;
  transition: all 0.3s ease-in-out;
}

/* === 6. 모바일 반응형 (기존 섹션 수정) === */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5em;
  }
  h2 {
    font-size: 2em;
  }
  .hero .cta-buttons {
    flex-direction: column;
  }

  /* --- [수정] 모바일 햄버거 버튼 표시 --- */
  .mobile-nav-toggle {
    display: block;
  }

  /* --- [수정] 모바일 메뉴 스타일 (슬라이드 방식) --- */
  nav .nav-links {
    /* display: none; -> 이 줄 삭제 */

    position: fixed; /* 화면 전체를 덮도록 */
    top: 0;
    right: 0;
    width: 80%; /* 화면의 80% 너비 */
    height: 100vh; /* 화면 전체 높이 */
    background-color: #1e1e1e; /* 메뉴 배경색 */

    display: flex;
    flex-direction: column; /* 링크를 세로로 정렬 */
    align-items: center;
    justify-content: center;

    /* 기본적으로 화면 밖(오른쪽)으로 숨김 */
    transform: translateX(100%);
    transition: transform 0.3s ease-out;

    padding: 20px;
  }

  /* JavaScript로 .nav-active 클래스가 추가되면 메뉴가 보임 */
  nav .nav-links.nav-active {
    transform: translateX(0);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
  }

  nav .nav-links a {
    margin-left: 0;
    font-size: 1.4em; /* 링크 텍스트 크기 키움 */
    padding: 20px 0; /* 링크 간격 */
  }

  /* --- [추가] 햄버거 버튼 'X'자 애니메이션 --- */
  .mobile-nav-toggle.is-active .icon-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .mobile-nav-toggle.is-active .icon-bar:nth-child(2) {
    opacity: 0;
  }
  .mobile-nav-toggle.is-active .icon-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* --- [추가] 갤러리 모바일에서 2단으로 보이게 --- */
  .gallery-grid {
    columns: 2 150px; /* 모바일에서 2단으로 설정 */
  }
}