:root{--build-id:"f72e270f-a479-49fe-8a40-6192144bc973";}
@charset "UTF-8";

/* 변수 정의: C39, F6, H19, S07 */
:root {
  --primary: #1c1917;
  --bg: #fafaf9;
  --text: #0c0a09;
  --accent: #57534e;
  --heading: var(--text);
  --link: var(--text);
  --section-padding: 5.5rem 0;
  --container-width: 1250px;
  --gap: 3.25rem;
}

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

body {
  font-family: Roboto, system-ui, "Noto Sans KR", "Malgun Gothic", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--text);
  background: var(--bg);
}

/* Skip Link */
.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;
}

/* 헤딩 스타일: H19 */
h1 {
  font-size: clamp(2.5rem, 5vw, 4.125rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.025em;
  color: var(--heading);
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(1.875rem, 4vw, 3.094rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--heading);
  margin-bottom: 1.5rem;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2.32rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--heading);
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1rem;
}

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

a:hover {
  text-decoration: underline;
}

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

/* 헤더: N11 */
header {
  background: var(--bg);
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.25rem 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%);
}

.logo:hover {
  text-decoration: none;
}

.menu-checkbox {
  display: none;
}

.menu-toggle {
  display: none;
  font-size: 1.75rem;
  cursor: pointer;
  color: var(--primary);
  position: absolute;
  left: 2rem;
}

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

nav a {
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--primary);
  text-decoration: none;
}

nav a[aria-current="page"] {
  color: var(--primary);
  font-weight: 700;
}

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

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

  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid #e5e7eb;
  }

  nav ul {
    flex-direction: column;
    padding: 1rem 2rem;
    gap: 1rem;
  }

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

/* 섹션 공통: S07 */
section {
  padding: var(--section-padding);
}

.section-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* 히어로: L10 */
.hero-section {
  background: linear-gradient(135deg, var(--bg) 0%, #f5f5f4 100%);
  text-align: center;
  padding: 7rem 0 5rem;
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero-text {
  font-size: 1.125rem;
  color: var(--text);
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-section svg {
  margin-top: 3rem;
}

/* 버튼: B19 */
.btn-primary,
.btn-secondary {
  display: inline-block;
  border-radius: 0.375rem;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  font-size: 0.875rem;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: var(--bg);
  border: 2px solid var(--primary);
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--bg);
  text-decoration: none;
}

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

/* 그리드: L10 6열 */
.grid-6 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

/* 카드: K19 */
.card {
  border-radius: 0.25rem;
  background: #f9fafb;
  padding: 1.5rem;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-4px);
}

.card .icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.75rem;
}

/* 섹션 배경 */
.intro-section {
  background: var(--bg);
}

.features-section {
  background: #f5f5f4;
}

.content-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

.column {
  padding: 1.5rem;
}

/* 통계: L10 */
.stats-section {
  background: var(--primary);
  color: var(--bg);
}

.stats-section h2 {
  color: var(--bg);
  text-align: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--gap);
  margin-top: 3rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  color: var(--bg);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  color: var(--bg);
  opacity: 0.9;
}

/* CTA: L10 중앙 */
.cta-section {
  background: var(--bg);
  text-align: center;
}

.cta-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.cta-section svg {
  margin-top: 2rem;
}

/* 페이지 헤더 */
.page-header {
  background: #f5f5f4;
  text-align: center;
  padding: 4rem 0 3rem;
}

.page-intro {
  font-size: 1.125rem;
  color: var(--text);
  opacity: 0.85;
  max-width: 700px;
  margin: 0 auto;
}

/* 콘텐츠 섹션 */
.content-section {
  background: var(--bg);
}

.content-section.alt {
  background: #f5f5f4;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

.value-item {
  padding: 1rem;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 2rem;
}

.feature-item {
  padding: 1.5rem;
  border-left: 4px solid var(--accent);
  background: #f9fafb;
}

.connection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

/* 방법 단계 */
.method-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

.step {
  background: #f9fafb;
  padding: 1.5rem;
  border-radius: 0.25rem;
  position: relative;
}

.step-number {
  display: inline-block;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: var(--bg);
  border-radius: 50%;
  text-align: center;
  line-height: 40px;
  font-weight: 700;
  margin-bottom: 1rem;
}

.maintenance-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

/* 팁 */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

.troubleshooting {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
}

.problem {
  background: #f9fafb;
  padding: 1.5rem;
  border-radius: 0.25rem;
  border-top: 3px solid var(--accent);
}

/* 연락처 */
.contact-section {
  background: var(--bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap);
  margin-top: 2rem;
  margin-bottom: 3rem;
}

.contact-card {
  background: #f9fafb;
  padding: 2.5rem;
  border-radius: 0.25rem;
  text-align: center;
}

.contact-card .icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 1rem;
}

.info-section {
  background: #f5f5f4;
}

/* 문서 페이지 */
.doc-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 4rem 2rem;
  text-align: center;
}

/* 푸터 */
footer {
  background: var(--primary);
  color: var(--bg);
  padding: 3rem 0;
  margin-top: 4rem;
}

.footer-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.footer-brand p {
  margin-bottom: 0.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--bg);
  opacity: 0.9;
}

.footer-links a:hover {
  opacity: 1;
}

.footer-contact p {
  margin-bottom: 0.5rem;
  opacity: 0.9;
}

/* 반응형 */
@media (max-width: 768px) {
  :root {
    --section-padding: 3rem 0;
    --gap: 2rem;
  }

  .hero-section {
    padding: 4rem 0 3rem;
  }

  .grid-6,
  .stats-grid,
  .connection-grid,
  .method-steps,
  .tips-grid,
  .troubleshooting {
    grid-template-columns: 1fr;
  }

  .content-columns {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-links {
    align-items: center;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .section-container,
  .hero-container,
  .cta-container {
    padding: 0 1.25rem;
  }

  .header-container {
    padding: 1rem 1.25rem;
  }
}