/* ===== 기본 세팅 ===== */
:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #d1fae5;
  --secondary: #6366f1;
  --dark: #0f172a;
  --gray-900: #111827;
  --gray-800: #1f2937;
  --gray-700: #374151;
  --gray-600: #4b5563;
  --gray-500: #6b7280;
  --gray-400: #9ca3af;
  --gray-300: #d1d5db;
  --gray-200: #e5e7eb;
  --gray-100: #f3f4f6;
  --gray-50: #f9fafb;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

* {
  box-sizing: border-box;
}

.rc-main-wrap {
  background: var(--gray-50);
  color: var(--gray-900);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR",
    "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 공통 섹션 */
.rc-section {
  padding: 80px 20px;
}

.rc-section-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.rc-section-header {
  text-align: center;
  margin-bottom: 48px;
}

.rc-section-title {
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

.rc-section-title span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rc-section-desc {
  font-size: 16px;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 3개 게시판 최신글 영역 (SEO 최적화 - 최상단 배치) ===== */
.rc-board-highlight {
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
  padding-top: 100px;
}

.rc-board-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* 카드 전체 */
.rc-board-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 28px 24px 24px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.rc-board-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.rc-board-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

/* 카드 헤더 */
.rc-board-header {
  margin-bottom: 20px;
}

.rc-board-header h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--gray-900);
  display: flex;
  align-items: center;
  gap: 8px;
}

.rc-board-header p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.5;
}

/* latest 스킨 목록 */
.rc-board-list {
  flex: 1;
}

/* latest 스킨 자체 헤더 숨김 (중복 방지) */
.rc-board-list .lt_title,
.rc-board-list > h2,
.rc-board-list > h3,
.rc-board-list > .tit,
.rc-board-list > div:first-child:not(.lt_ul):not(ul) {
  display: none !important;
}

/* basic 스킨 헤더 숨김 */
.rc-board-list .basic_tit,
.rc-board-list .lt_tit {
  display: none !important;
}

.rc-board-list ul {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.rc-board-list li {
  font-size: 14px;
  border-bottom: 1px solid var(--gray-100);
  padding: 12px 0;
  transition: background 0.2s ease;
}

.rc-board-list li:last-child {
  border-bottom: none;
}

.rc-board-list li:hover {
  background: var(--gray-50);
  margin: 0 -12px;
  padding-left: 12px;
  padding-right: 12px;
  border-radius: 8px;
}

.rc-board-list a {
  color: var(--gray-700);
  text-decoration: none;
  display: block;
  transition: color 0.2s ease;
}

.rc-board-list a:hover {
  color: var(--primary-dark);
}

/* 카드 하단 링크 */
.rc-board-footer {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
}

.rc-board-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  text-decoration: none;
  transition: gap 0.2s ease;
}

.rc-board-link:hover {
  gap: 10px;
}

.rc-board-link::after {
  content: "→";
}

/* ===== HERO ===== */
.rc-hero {
  padding: 60px 20px 80px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--gray-800) 100%);
  position: relative;
  overflow: hidden;
}

.rc-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.rc-hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.rc-hero-content {
  color: var(--white);
}

.rc-hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 24px;
}

.rc-hero-title {
  font-size: clamp(32px, 6vw, 48px);
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.rc-hero-title span {
  display: block;
  margin-top: 8px;
  font-size: clamp(18px, 3vw, 22px);
  font-weight: 500;
  color: var(--gray-400);
}

.rc-hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--gray-300);
  margin-bottom: 16px;
}

.rc-hero-slogan {
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray-400);
  margin-bottom: 32px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius);
  border-left: 3px solid var(--primary);
}

.rc-hero-slogan strong {
  color: var(--primary);
}

/* Hero 우측 장식 */
.rc-hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.rc-hero-badge {
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(99, 102, 241, 0.2));
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  border: 2px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.rc-hero-badge-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.rc-hero-badge-text {
  font-size: 14px;
  color: var(--gray-300);
  text-align: center;
  line-height: 1.6;
}

/* 버튼 */
.rc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.rc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.rc-btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
}

.rc-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
  color: var(--white);
}

.rc-btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.3);
  color: var(--white);
  background: transparent;
}

.rc-btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--white);
}

/* ===== INTRO ===== */
.rc-intro {
  background: var(--white);
}

.rc-intro-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.rc-intro-text {
  font-size: 16px;
  line-height: 1.9;
  color: var(--gray-600);
  margin-bottom: 12px;
}

.rc-intro-text strong {
  color: var(--primary-dark);
  font-weight: 600;
}

.rc-intro-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.rc-intro-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--gray-50);
  border-radius: var(--radius);
  transition: background 0.2s ease;
}

.rc-intro-feature:hover {
  background: var(--primary-light);
}

.rc-intro-feature-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.rc-intro-feature-text {
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.5;
}

/* ===== 주요 섹션 카드 ===== */
.rc-sections-detail {
  background: var(--gray-50);
}

.rc-section-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.rc-section-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.rc-section-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.rc-section-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.rc-section-card p {
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.7;
  font-size: 14px;
  flex: 1;
}

.rc-section-card ul {
  margin: 0 0 16px;
  padding-left: 0;
  list-style: none;
}

.rc-section-card li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  font-size: 14px;
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

.rc-section-card li:last-child {
  border-bottom: none;
}

.rc-section-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.rc-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  text-decoration: none;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--gray-100);
  transition: gap 0.2s ease;
}

.rc-card-link:hover {
  gap: 10px;
}

.rc-card-link::after {
  content: "→";
}

/* ===== CTA ===== */
.rc-cta {
  background: linear-gradient(135deg, var(--dark) 0%, var(--gray-800) 100%);
  position: relative;
  overflow: hidden;
}

.rc-cta::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  animation: pulse 15s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20%, 20%); }
}

.rc-cta-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.rc-cta h2 {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.rc-cta p {
  font-size: 17px;
  color: var(--gray-400);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.rc-cta .rc-hero-actions {
  justify-content: center;
}

/* ===== Footer 요약 ===== */
.rc-footer-note {
  background: var(--white);
  border-top: 1px solid var(--gray-200);
  padding: 40px 20px;
}

.rc-footer-text {
  text-align: center;
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto;
}

.rc-footer-text strong {
  color: var(--primary-dark);
}

/* ===== 반응형 - 태블릿 ===== */
@media (max-width: 1024px) {
  .rc-section {
    padding: 60px 20px;
  }

  .rc-hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .rc-hero-visual {
    order: -1;
  }

  .rc-hero-badge {
    width: 200px;
    height: 200px;
  }

  .rc-hero-badge-icon {
    font-size: 48px;
  }

  .rc-hero-actions {
    justify-content: center;
  }

  .rc-hero-slogan {
    border-left: none;
    border-top: 3px solid var(--primary);
  }

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

  .rc-intro-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ===== 반응형 - 모바일 ===== */
@media (max-width: 640px) {
  .rc-section {
    padding: 48px 16px;
  }

  .rc-section-header {
    margin-bottom: 32px;
  }

  .rc-board-highlight {
    padding-top: 60px;
  }

  .rc-hero {
    padding: 40px 16px 60px;
  }

  .rc-hero-badge {
    width: 160px;
    height: 160px;
  }

  .rc-hero-badge-icon {
    font-size: 36px;
    margin-bottom: 8px;
  }

  .rc-hero-badge-text {
    font-size: 12px;
  }

  .rc-hero-actions {
    flex-direction: column;
  }

  .rc-btn {
    width: 100%;
    padding: 16px 24px;
  }

  .rc-board-grid,
  .rc-section-grid,
  .rc-intro-features {
    grid-template-columns: 1fr;
  }

  .rc-board-card,
  .rc-section-card {
    padding: 24px 20px;
  }

  .rc-intro-feature {
    padding: 14px;
  }

  .rc-cta .rc-hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .rc-cta .rc-btn {
    width: 100%;
    max-width: 300px;
  }
}

/* ===== 다크모드 지원 (선택사항) ===== */
@media (prefers-color-scheme: dark) {
  .rc-main-wrap {
    /* 다크모드 필요 시 여기에 추가 */
  }
}

/* ===== 접근성 개선 ===== */
@media (prefers-reduced-motion: reduce) {
  .rc-board-card,
  .rc-section-card,
  .rc-btn {
    transition: none;
  }

  .rc-board-card:hover,
  .rc-section-card:hover {
    transform: none;
  }

  @keyframes pulse {
    0%, 100% { transform: none; }
  }
}

/* 포커스 스타일 */
.rc-btn:focus,
.rc-board-link:focus,
.rc-card-link:focus,
.rc-board-list a:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* 스크린 리더 전용 */
.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;
}