:root{--build-id:"d976c667-db59-46e2-a086-93b8943bae35";}
/* ====================================
   sivo28.site - 이보미로28 이어폰
   변수: L27, C25, T23, B13, N13, K13, S05, H13, F7, CS13
   ==================================== */

/* C25: 퍼플/인디고 색상 팔레트 */
:root {
  --primary: #8b5cf6;
  --bg: #faf5ff;
  --text: #3b0764;
  --accent: #a78bfa;
  --heading: var(--text);
  --link: var(--text);
}

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

/* F7: Neutral Core 시스템 폰트 */
body {
  font-family: system-ui, "Noto Sans KR", "Malgun Gothic", -apple-system, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0em;
  background: var(--bg);
  color: var(--text);
}

/* H13: 헤딩 스타일 */
h1 {
  font-size: 3.125rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0;
  color: var(--heading);
}

h2 {
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0;
  color: var(--heading);
}

h3 {
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0;
  color: var(--heading);
}

/* 링크 */
a {
  color: var(--link);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary);
}

a:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}

/* Skip to Content */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #000;
  color: #fff;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

/* N13: 상단 투명 + 좌측 메뉴 + 중앙 로고 + 우측 CTA + 햄버거 */
header {
  background: transparent;
  padding: 1.5rem 0;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(250, 245, 255, 0.9);
}

.header-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: var(--text);
  background: none;
  border: none;
  padding: 0.5rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 3rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

nav ul li a {
  font-weight: 500;
  transition: color 0.3s ease;
}

nav ul li a[aria-current="page"] {
  color: var(--primary);
  font-weight: 600;
}

.header-cta {
  margin-left: auto;
}

/* B13: 하단 테두리 미니멀 버튼 */
.btn {
  border: none;
  border-bottom: 3px solid var(--primary);
  padding: 0.75rem 0;
  font-weight: 700;
  text-transform: uppercase;
  background: transparent;
  color: var(--primary);
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
}

.btn:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.btn:focus-visible {
  outline: 3px solid #0066cc;
  outline-offset: 2px;
}

/* S05: 섹션 여백 */
section {
  padding: 7rem 0;
}

.container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* L27: 임팩트 히어로 */
.hero {
  text-align: center;
  padding: 10rem 0 7rem;
  background: linear-gradient(135deg, var(--bg) 0%, #f3e8ff 100%);
}

.hero h1 {
  margin-bottom: 2rem;
  font-size: 4rem;
}

.hero p {
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 3rem;
  line-height: 1.8;
}

/* 4열 그리드 */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5rem;
}

/* K13: 오프셋 그림자 카드 */
.card {
  border-radius: 0.5rem;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.1);
  padding: 2rem;
  background: #fff;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.15);
}

.card h3 {
  margin-bottom: 1rem;
  color: var(--primary);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

/* 케이스 스터디 섹션 */
.case-study {
  background: #fff;
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  margin-bottom: 3rem;
}

.case-study h3 {
  margin-bottom: 1.5rem;
}

/* 버튼 그룹 CTA */
.btn-group {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 섹션 헤딩 */
.section-heading {
  text-align: center;
  margin-bottom: 4rem;
}

.section-heading h2 {
  margin-bottom: 1rem;
}

.section-heading p {
  font-size: 1.125rem;
  color: var(--text);
  opacity: 0.8;
  max-width: 700px;
  margin: 0 auto;
}

/* 리스트 스타일 */
ul.feature-list {
  list-style: none;
  padding: 0;
}

ul.feature-list li {
  padding: 1rem 0;
  border-bottom: 1px solid rgba(59, 7, 100, 0.1);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

ul.feature-list li:last-child {
  border-bottom: none;
}

ul.feature-list li::before {
  content: "✓";
  color: var(--primary);
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

/* 푸터 */
footer {
  background: var(--text);
  color: #fff;
  padding: 3rem 0 2rem;
  margin-top: 7rem;
}

.footer-content {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-section h3 {
  color: #fff;
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

/* SVG 스타일 */
svg {
  max-width: 100%;
  height: auto;
}

/* 문서 컨테이너 (privacy, terms) */
.doc-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 5rem 2rem;
  text-align: center;
}

.doc-container h1 {
  margin-bottom: 2rem;
}

.doc-container p {
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
  }

  h1 {
    font-size: 2.5rem;
  }

  .hero h1 {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .logo {
    position: static;
    transform: none;
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(250, 245, 255, 0.98);
    padding: 2rem;
    display: none;
    flex-direction: column;
    gap: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  nav ul li {
    width: 100%;
    border-bottom: 1px solid rgba(59, 7, 100, 0.1);
  }

  nav ul li a {
    display: block;
    padding: 1rem 0;
  }

  .header-cta {
    margin-left: 0;
    margin-top: 1rem;
    width: 100%;
  }

  .menu-checkbox:checked ~ nav {
    display: flex;
  }

  .grid-4 {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  section {
    padding: 4rem 0;
  }

  .hero {
    padding: 6rem 0 4rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.5rem;
  }

  .btn-group {
    flex-direction: column;
    gap: 1rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

  .card {
    padding: 1.5rem;
  }
}