:root {
  /* 색상 시스템: 사례집 팔레트 기반 */
  --color-primary: #E8765A;
  --color-primary-light: #F2A08A;
  --color-primary-pale: #FDE8E2;
  --color-accent: #4A9B7F;
  --color-bg: #F7F4F0;
  --color-bg-section: #FFFFFF;
  --color-bg-dark: #3D3530;
  --color-text: #2C2420;
  --color-text-muted: #7A6B63;
  --color-border: #E8DDD7;
  --color-white: #FFFFFF;

  /* 타이포그래피 */
  --font-base: 'Noto Sans KR', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;

  /* 간격 / 라운드 / 그림자 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.10);

  --max-width: 1100px;
  --transition: 0.25s ease;
}

/* CSS Reset (최소) */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

/* 포커스 가시성 */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 시각적 숨김 (스크린리더용) */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 레이아웃 유틸리티 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-primary);
  color: #ffffff;
  padding: 0.5rem 1rem;
  z-index: 9999;
}

.skip-link:focus {
  top: 1rem;
}

section {
  padding: var(--spacing-xl) 0;
}

section:nth-of-type(odd) {
  background-color: var(--color-bg);
}

section:nth-of-type(even) {
  background-color: var(--color-bg-section);
}

/* 헤더 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--font-size-sm);
}

.header-nav {
  display: flex;
  gap: 1.5rem;
  font-size: var(--font-size-sm);
}

.header-nav a {
  position: relative;
}

.header-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition);
}

.header-nav a:hover::after,
.header-nav a:focus-visible::after {
  width: 100%;
}

.header-nav a.active {
  font-weight: 700;
  color: var(--color-primary);
}

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}

.hamburger {
  display: none;
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  padding: 0;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  height: 2px;
  border-radius: 999px;
  background-color: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

/* 버튼 */
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition:
    background-color var(--transition),
    color var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.btn-primary {
  border: none;
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

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

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: var(--color-primary-pale);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

/* 공통 섹션 헤더 */
.section-header {
  margin-bottom: 2.5rem;
}

.section-header--center {
  text-align: center;
}

.section-header h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

.section-eyebrow {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0 0 0.25rem;
}

.section-description {
  margin: 0;
  color: var(--color-text-muted);
}

.section-accent {
  display: block;
  width: 48px;
  height: 4px;
  border-radius: 999px;
  background-color: var(--color-primary);
}

/* Hero 섹션 */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, #1B4332 0%, #2D6A4F 60%, #40916C 100%);
}

.hero-inner {
  position: relative;
  padding-top: 6rem;
  padding-bottom: 4rem;
}

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.9rem;
  margin-bottom: 1.25rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.hero-title {
  font-size: 3rem;
  line-height: 1.3;
  font-weight: 700;
  margin: 0 0 1rem;
}

.hero-subtitle {
  margin: 0 0 2rem;
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-outline {
  border-color: #ffffff;
  color: #ffffff;
}

.hero-outline:hover,
.hero-outline:focus-visible {
  background-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 2.5rem;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: default;
}

.hero-scroll-icon {
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(8px);
  }
}

/* About 섹션 */
#about {
  background-color: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: flex-start;
}

.about-text h3 {
  margin: 0 0 0.5rem;
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.about-text p {
  margin: 0 0 1.5rem;
  color: var(--color-text-muted);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.about-card {
  background-color: var(--color-white);
  border-left: 4px solid var(--color-primary);
  padding: 1.5rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.about-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.about-card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

/* Cases 섹션 */
.cases-inner {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.case-card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 1.75rem;
  border-top: 4px solid var(--color-primary);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.case-card__tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
  background-color: var(--color-accent);
  color: #ffffff;
}

.case-card__meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.case-card__quote {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-accent);
  font-style: italic;
  color: var(--color-text-muted);
}

.case-card__turning {
  margin-top: 0.25rem;
}

.turning-label {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.6rem;
  border-radius: 999px;
  background-color: var(--color-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.case-card__turning p {
  margin: 0.25rem 0 0;
  font-size: var(--font-size-sm);
}

.case-card__keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.5rem;
}

.keyword-chip {
  padding: 0.1rem 0.6rem;
  border-radius: 999px;
  background-color: var(--color-bg-section);
  border: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.cases-footer {
  text-align: right;
}

.cases-link {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
}

.cases-link:hover,
.cases-link:focus-visible {
  text-decoration: underline;
}

/* Stats 섹션 */
#stats {
  background-color: var(--color-primary);
  color: #ffffff;
}

.stats-inner {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.stats-header h2 {
  color: #ffffff;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-card {
  text-align: center;
  padding: 2rem 1.5rem;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-card:last-child {
  border-right: none;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.stat-label {
  margin: 0;
  font-weight: 500;
}

.stat-source {
  margin: 0.25rem 0 0;
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* 푸터 */
.site-footer {
  padding: var(--spacing-lg) 0;
  background-color: var(--color-text);
  color: var(--color-white);
  font-size: var(--font-size-sm);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 2fr 1.5fr;
  gap: 2rem;
  align-items: flex-start;
}

.footer-title {
  margin: 0 0 0.25rem;
  font-weight: 600;
}

.footer-subtitle {
  margin: 0;
  opacity: 0.8;
}

.footer-info p {
  margin: 0.1rem 0;
  opacity: 0.9;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-align: right;
}

.footer-links a {
  color: #fef3c7;
  font-size: var(--font-size-sm);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  text-decoration: underline;
}

/* 반응형 */
@media (max-width: 768px) {
  section {
    padding: var(--spacing-lg) 0;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .header-nav {
    position: absolute;
    inset: 64px 0 auto 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: 0.75rem 1.5rem 1rem;
    display: none;
    flex-direction: column;
    gap: 0.75rem;
  }

  .header-nav.open {
    display: flex;
  }

  .hamburger {
    display: inline-flex;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .footer-links {
    text-align: left;
  }

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

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat-card {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

  .stat-card:last-child {
    border-bottom: none;
  }
}

@media (max-width: 480px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }
}

/* Support 섹션 */
.support-inner {
  padding-top: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.support-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  border: 1.5px solid var(--color-accent);
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.support-card--emergency {
  border-color: #E63946;
}

.support-card__icon {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.support-card__name {
  margin: 0 0 0.25rem;
  font-size: var(--font-size-lg);
}

.support-card__number {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.support-card__service {
  margin: 0 0 0.75rem;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.support-card__link {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.support-card:hover,
.support-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

/* Download 섹션 */
#download {
  text-align: center;
  background-color: var(--color-bg-section);
}

.download-inner {
  padding-top: var(--spacing-xl);
  padding-bottom: var(--spacing-xl);
}

.download-icon {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.download-inner h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

.download-description {
  margin: 0 0 2rem;
  color: var(--color-text-muted);
}

.download-actions {
  margin-bottom: 1.75rem;
}

.download-btn {
  font-size: var(--font-size-lg);
}

.download-share-title {
  margin: 0 0 0.75rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.download-share-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: var(--radius-sm);
  padding: 0.6rem 1.2rem;
  border: none;
  font-size: var(--font-size-sm);
  cursor: pointer;
  color: #1a1a1a;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
}

.share-btn:hover,
.share-btn:focus-visible {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.share-btn--kakao {
  background-color: #FEE500;
  color: #1A1A1A;
}

.share-btn--facebook {
  background-color: #1877F2;
  color: #ffffff;
}

.share-btn--link {
  background-color: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.share-icon {
  font-size: 1rem;
}

.download-note {
  margin-top: 1.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* 스크롤 진입 애니메이션 공통 */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* 인쇄용 스타일 */
@media print {
  .site-header,
  .hamburger,
  .share-buttons,
  .site-footer {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
    background: #fff;
  }

  .case-card {
    break-inside: avoid;
    border: 1px solid #ccc;
  }

  a[href]::after {
    content: " (" attr(href) ")";
  }
}