/* index.css - 디자인 시스템 및 메인 레이아웃 스타일 */

/* 1. 글로벌 웹 폰트 로드 */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;800&family=Inter:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

/* 2. 디자인 토큰 (CSS variables) */
:root {
  /* 색상 테마: A안 - Royal Gold & Deep Navy (골드 테마 스위칭) */
  --bg-color: #060B19;
  --bg-gradient: radial-gradient(circle at 50% 30%, #0d162d 0%, #060b19 70%);
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  /* Gold 테마 색상 정의 */
  --primary-gold: #C5A880;
  --primary-gold-rgb: 197, 168, 128;
  --accent-gold: #E5C158;
  --accent-gold-rgb: 229, 193, 88;
  --dark-gold: #9E7D55;
  
  /* 기존 틸 변수명에 골드 변수들을 매핑하여 CSS 전반의 대대적 수정 없이 테마 전환 */
  --primary-teal: var(--primary-gold);
  --primary-teal-rgb: var(--primary-gold-rgb);
  --accent-teal: var(--accent-gold);
  --accent-teal-rgb: var(--accent-gold-rgb);
  --dark-teal: var(--dark-gold);
  
  --card-bg: rgba(15, 23, 42, 0.55);
  --card-border: rgba(255, 255, 255, 0.05);
  --card-hover-border: rgba(var(--accent-teal-rgb), 0.4);
  --glass-blur: blur(16px);
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 25px rgba(var(--accent-teal-rgb), 0.25);
  
  /* 폰트 및 레이아웃 */
  --font-title: 'Outfit', 'Noto Sans KR', sans-serif;
  --font-body: 'Inter', 'Noto Sans KR', sans-serif;
  --max-width: 1200px;
  --nav-height: 80px;
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;

  /* 디자인 시스템 별칭 토큰: 신규 UI는 아래 의미 기반 토큰을 우선 사용 */
  --color-brand-navy-950: #060B19;
  --color-brand-navy-900: #080E1E;
  --color-brand-navy-800: #0D162D;
  --color-gold: var(--accent-gold);
  --color-gold-muted: var(--primary-gold);
  --color-gold-deep: var(--dark-gold);
  --color-teal: #00A896;
  --color-teal-bright: #02C39A;
  --color-ink-900: #0F172A;
  --color-ink-800: #1E293B;
  --color-ink-700: #334155;
  --color-ink-600: #475569;
  --color-ink-500: #64748B;
  --color-ink-400: #94A3B8;
  --color-line: #E2E8F0;
  --color-line-soft: #F1F5F9;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F8FAFC;
  --color-success: #00A896;
  --color-info: #3B82F6;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;

  --surface-page: var(--bg-color);
  --surface-page-gradient: var(--bg-gradient);
  --surface-panel: var(--card-bg);
  --surface-panel-border: var(--card-border);
  --surface-panel-hover-border: var(--card-hover-border);
  --text-strong: var(--text-primary);
  --text-body: var(--text-secondary);
  --text-subtle: var(--text-muted);
  --accent-primary: var(--primary-teal);
  --accent-primary-rgb: var(--primary-teal-rgb);
  --accent-emphasis: var(--accent-teal);
  --accent-emphasis-rgb: var(--accent-teal-rgb);
  --focus-ring: 0 0 0 3px rgba(var(--accent-emphasis-rgb), 0.18);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-section: 120px;

  --radius-xs: 4px;
  --radius-sm: var(--border-radius-sm);
  --radius-md: var(--border-radius-md);
  --radius-lg: var(--border-radius-lg);
  --radius-pill: 999px;
}

/* 세이지 틸 & 딥네이비 테마 (B안) 오버라이드 */
body.theme-teal {
  --bg-color: #080E1E;
  --bg-gradient: radial-gradient(circle at 50% 30%, #0c1836 0%, #080e1e 70%);
  --primary-teal: #00A896;
  --primary-teal-rgb: 0, 168, 150;
  --accent-teal: #02C39A;
  --accent-teal-rgb: 2, 195, 154;
  --dark-teal: #028090;
  --card-border: rgba(255, 255, 255, 0.06);
}

/* 라이트 도구/콘텐츠 화면 토큰 */
body.rpa-light-theme {
  --bg-color: #FFFFFF;
  --bg-gradient: none;
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --primary-teal: #00A896;
  --primary-teal-rgb: 0, 168, 150;
  --accent-teal: #02C39A;
  --accent-teal-rgb: 2, 195, 154;
  --dark-teal: #028090;
  --card-bg: #FFFFFF;
  --card-border: #E2E8F0;
  --card-hover-border: rgba(2, 195, 154, 0.45);
  --surface-page: #FFFFFF;
  --surface-page-gradient: none;
  --surface-panel: #FFFFFF;
  --surface-panel-border: #E2E8F0;
  --text-strong: #0F172A;
  --text-body: #475569;
  --text-subtle: #64748B;
}

/* 3. 기본 리셋 스타일 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
  word-break: keep-all;
  overflow-wrap: break-word;
}

body {
  background-color: var(--bg-color);
  background-image: var(--bg-gradient);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
  transition: background-color 0.4s ease, color 0.3s ease;
}

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

ul {
  list-style: none;
}

/* 4. 공통 유틸리티 클래스 */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: -0.02em;
}

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

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto 64px auto;
  text-align: center;
}

/* 5. 배경 플로팅 기하학 도형 (CSS GPU 가속 적용) */
.bg-decorations {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
  z-index: 1;
}

.decor-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.15;
  will-change: transform;
}

.shape-1 {
  top: 10%;
  right: 15%;
  width: 350px;
  height: 350px;
  background: var(--primary-teal);
  animation: floatA 16s ease-in-out infinite;
}

.shape-2 {
  top: 40%;
  left: 10%;
  width: 400px;
  height: 400px;
  background: var(--dark-teal);
  animation: floatB 20s ease-in-out infinite;
}

.shape-3 {
  bottom: 15%;
  right: 20%;
  width: 300px;
  height: 300px;
  background: var(--accent-teal);
  animation: floatC 14s ease-in-out infinite;
}

@keyframes floatA {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(30px, -40px) scale(1.1); }
}

@keyframes floatB {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(-25px, 35px) scale(0.95); }
}

@keyframes floatC {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(20px, -20px) scale(1.05); }
}

/* 6. 헤더 및 네비게이션 */
#header {
  height: var(--nav-height);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(8, 14, 30, 0.7);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  transition: all 0.3s ease;
}

#header.scrolled {
  background: rgba(8, 14, 30, 0.95);
  box-shadow: var(--shadow-sm);
  height: 70px;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-family: 'Pretendard', sans-serif;
  font-size: 1.45rem;
  font-weight: 700; /* Pretendard Bold */
  letter-spacing: -0.04em;
  display: inline-flex;
  align-items: center;
  gap: 8px; /* 정렬 및 크기 밸런스 최적화 */
}

.logo .logo-symbol {
  height: 26px;
  width: 26px;
  flex-shrink: 0; /* 찌그러짐 방지 */
  object-fit: contain;
  transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  filter: drop-shadow(0 2px 6px rgba(var(--primary-teal-rgb), 0.25));
  /* 미세 수직 정렬 보정: 폰트의 한글 베이스라인 특성 보정 */
  transform: translateY(0.5px);
}

.logo:hover .logo-symbol {
  transform: rotate(45deg) scale(1.08) translateY(0.5px);
  filter: drop-shadow(0 4px 10px rgba(var(--accent-teal-rgb), 0.5));
}

.logo span {
  color: var(--text-primary);
}

.logo span strong {
  background: linear-gradient(135deg, var(--accent-teal), var(--primary-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800; /* Pretendard ExtraBold */
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.25s ease;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-teal);
  transition: width 0.25s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}

.nav-link.nav-cta {
  padding: 9px 14px;
  border-radius: 8px;
  background: var(--accent-teal);
  color: #fff;
  font-weight: 700;
}

.nav-link.nav-cta::after {
  display: none;
}

.menu-toggle {
  display: none;
  padding: 4px;
  border: 0;
  background: transparent;
  color: inherit;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 7. Hero Section */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

#bg-canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 2; /* 배경 데코 도형(1) 위, 텍스트 콘텐츠(10) 아래에 배치 */
  pointer-events: none;
  opacity: 0.32; /* 전체 페이지 배경이므로 눈의 피로를 최소화하기 위해 살짝 투명화 */
  mix-blend-mode: screen;
}

#bg-canvas-container canvas {
  display: block;
  width: 100vw !important;
  height: 100vh !important;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 10;
}

.hero-content {
  text-align: left;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(2, 195, 154, 0.1);
  border: 1px solid rgba(2, 195, 154, 0.25);
  border-radius: 50px;
  color: var(--accent-teal);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-title);
  font-size: clamp(1.85rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 28px;
  letter-spacing: -0.03em;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.hero-title span {
  display: block;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #ffffff, var(--accent-teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  color: var(--text-secondary);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.25s ease;
  cursor: pointer;
  gap: 8px;
}

.btn-primary {
  background-color: var(--primary-teal);
  color: var(--text-primary);
  border: 1px solid var(--primary-teal);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--accent-teal);
  border-color: var(--accent-teal);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

/* 히어로 우측 카드형 프로필 래퍼 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-profile-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: var(--glass-blur);
  padding: 24px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  width: 100%;
  transition: border-color 0.3s ease;
  will-change: transform;
}

.hero-profile-card:hover {
  border-color: var(--card-hover-border);
}

.profile-img-box {
  width: 100%;
  height: 380px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background-color: rgba(8, 14, 30, 0.3);
}

.profile-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-profile-card:hover .profile-img-box img {
  transform: scale(1.05);
}

.profile-info h3 {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.profile-info h3 span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.profile-info p {
  color: var(--accent-teal);
  font-size: 0.9rem;
  font-weight: 600;
}

.profile-bullets {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  padding-left: 0;
}

.profile-bullets li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  text-align: left;
}

.profile-bullets li i {
  color: var(--accent-teal);
  font-size: 0.85rem;
  flex-shrink: 0;
  margin-top: 1px;
}

/* 스크롤 다운 가이드 */
.scroll-down {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-column: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  opacity: 0.8;
  z-index: 10;
  pointer-events: none;
}

.scroll-down i {
  font-size: 1.2rem;
  animation: bounce 2s ease-in-out infinite;
}

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

/* 8. Biography Section */
.bio-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
  align-items: flex-start;
}

.bio-images {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.bio-img-wrapper {
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  height: 280px;
  border: 1px solid var(--card-border);
  background-color: rgba(15, 23, 42, 0.4);
}

.bio-img-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.bio-img-wrapper:hover img {
  transform: scale(1.05);
}

.bio-img-span-2 {
  grid-column: span 2;
  height: 300px;
}

.bio-text h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.4;
}

.bio-text h3 span {
  color: var(--accent-teal);
}

.bio-text p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.timeline {
  border-left: 2px solid rgba(2, 195, 154, 0.25);
  padding-left: 24px;
  position: relative;
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -31px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-color);
  border: 2.5px solid var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
}

.timeline-time {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-teal);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.timeline-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 9. Core Strengths Section (Why Us?) - Accordion UI */
.strengths-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  backdrop-filter: var(--glass-blur);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.accordion-item:hover {
  border-color: var(--card-hover-border);
}

.accordion-item.active {
  border-color: var(--card-hover-border);
  box-shadow: var(--shadow-glow);
}

.accordion-header {
  padding: 24px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.accordion-title-box {
  display: flex;
  align-items: center;
  gap: 20px;
}

.accordion-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background: rgba(2, 195, 154, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-teal);
  font-size: 1.25rem;
  border: 1px solid rgba(2, 195, 154, 0.15);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.accordion-item.active .accordion-icon {
  background: var(--primary-teal);
  color: var(--text-primary);
  box-shadow: 0 0 10px rgba(2, 195, 154, 0.3);
}

.accordion-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
}

.accordion-arrow {
  color: var(--text-muted);
  transition: transform 0.3s ease;
  font-size: 1.1rem;
}

.accordion-item.active .accordion-arrow {
  transform: rotate(180deg);
  color: var(--accent-teal);
}

.accordion-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s cubic-bezier(0.25, 1, 0.5, 1);
  overflow: hidden; /* 접혀있을 때 내용 삐져나옴 방지 */
}

.accordion-item.active .accordion-content {
  grid-template-rows: 1fr;
}

.accordion-content p {
  overflow: hidden;
  padding: 0 32px 24px 96px; /* 아이콘 폭 + 좌우 패딩 감안한 마진 */
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* 10. Book Highlight Section */
.book-highlight {
  margin-top: 80px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.8) 0%, rgba(8, 14, 30, 0.8) 100%);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 48px;
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.book-visual {
  display: flex;
  justify-content: center;
  perspective: 1000px;
}

.book-cover {
  width: 200px;
  height: auto;
  border-radius: 4px 12px 12px 4px;
  box-shadow: -10px 15px 30px rgba(0, 0, 0, 0.5);
  transform: rotateY(-15deg) rotateX(5deg);
  transition: transform 0.5s ease;
}

.book-highlight:hover .book-cover {
  transform: rotateY(-5deg) rotateX(2deg) scale(1.03);
}

.book-badge {
  display: inline-block;
  padding: 6px 12px;
  background: linear-gradient(135deg, #D4AF37, #C5A880);
  border-radius: 4px;
  color: #080E1E;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.book-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.book-subtitle {
  font-family: var(--font-title);
  font-size: 1.125rem;
  color: var(--accent-teal);
  margin-bottom: 20px;
  font-weight: 600;
}

.book-desc {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.book-stats {
  display: flex;
  gap: 32px;
}

.book-stat-item h4 {
  font-family: var(--font-title);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-teal);
}

.book-stat-item p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* 11. Curriculum Section */
.curriculum-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.tab-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.25s ease;
  backdrop-filter: var(--glass-blur);
}

.tab-btn:hover {
  border-color: rgba(2, 195, 154, 0.25);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--primary-teal);
  border-color: var(--primary-teal);
  color: var(--text-primary);
  box-shadow: 0 0 15px rgba(0, 168, 150, 0.3);
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-in-out forwards;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to   { opacity: 1; transform: translateY(0); }
}

.curriculum-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.course-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: var(--glass-blur);
  padding: 40px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.3s ease;
}

.course-card:hover {
  border-color: var(--card-hover-border);
}

.course-header {
  margin-bottom: 24px;
}

.course-duration {
  font-family: var(--font-title);
  color: var(--accent-teal);
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.course-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.course-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.course-details {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  margin-top: 24px;
}

.detail-item {
  display: flex;
  margin-bottom: 16px;
  align-items: flex-start;
  gap: 12px;
}

.detail-item:last-child {
  margin-bottom: 0;
}

.detail-item i {
  color: var(--accent-teal);
  font-size: 1.1rem;
  margin-top: 2px;
}

.detail-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  width: 90px;
  flex-shrink: 0;
}

.detail-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* 12. References Section */
.journey-section { background: rgba(2,195,154,.035); }
.journey-grid { display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px; }
.journey-card { display:flex;flex-direction:column;min-width:0;padding:26px;border:1px solid var(--card-border);border-radius:var(--border-radius-md);background:var(--card-bg); }
.journey-card > span { color:var(--accent-teal);font-size:.76rem;font-weight:800;letter-spacing:.05em; }
.journey-card h3 { margin:12px 0;font-size:1.13rem;line-height:1.45; }
.journey-card p { margin:0 0 22px;color:var(--text-secondary);font-size:.9rem;line-height:1.65; }
.journey-card a { display:inline-flex;align-items:center;gap:7px;margin-top:auto;color:var(--accent-teal);font-weight:700; }
@media(max-width:1024px){.journey-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.journey-grid{grid-template-columns:1fr}}

.case-study-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.case-study-card {
  overflow: hidden;
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
}

.case-study-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.case-study-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 26px;
}

.case-study-type {
  margin-bottom: 10px;
  color: var(--accent-teal);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.case-study-card h3 {
  margin-bottom: 22px;
  color: var(--text-primary);
  font-size: 1.25rem;
  line-height: 1.45;
}

.case-study-facts {
  display: grid;
  gap: 14px;
  margin: 0 0 24px;
}

.case-study-facts div {
  padding-top: 13px;
  border-top: 1px solid var(--card-border);
}

.case-study-facts dt {
  margin-bottom: 5px;
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 700;
}

.case-study-facts dd {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

.case-study-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  color: var(--accent-teal);
  font-weight: 700;
}

.case-study-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 64px;
  padding: 24px 28px;
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  background: rgba(2, 195, 154, 0.06);
}

.case-study-cta p {
  margin: 0;
  color: var(--text-primary);
  font-weight: 600;
}

@media (max-width: 900px) {
  .case-study-grid {
    grid-template-columns: 1fr;
  }

  .case-study-cta {
    align-items: stretch;
    flex-direction: column;
    text-align: center;
  }
}

.reference-categories {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.ref-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  padding: 8px 16px;
  position: relative;
  transition: color 0.25s ease;
}

.ref-tab-btn.active, .ref-tab-btn:hover {
  color: var(--text-primary);
}

.ref-tab-btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--accent-teal);
  transition: width 0.25s ease;
}

.ref-tab-btn.active::after {
  width: 60%;
}

.logo-sliders {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  overflow: hidden;
}

.logo-slider-container {
  width: 100%;
  overflow: hidden;
  position: relative;
  padding: 10px 0;
}

/* 좌우 페이드아웃 효과 그라데이션 마스크 */
.logo-slider-container::before,
.logo-slider-container::after {
  content: '';
  position: absolute;
  top: 0;
  width: 150px;
  height: 100%;
  z-index: 5;
  pointer-events: none;
}
.logo-slider-container::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-color) 0%, transparent 100%);
}
.logo-slider-container::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-color) 0%, transparent 100%);
}

.logo-slider-track {
  display: flex;
  width: max-content;
  gap: 20px;
  will-change: transform;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.logo-slider-track:active {
  cursor: grabbing;
}

.logo-item {
  background: #ffffff;
  border: 1px solid #f1f5f9;
  height: 140px;
  width: 180px;
  padding: 20px 16px;
  border-radius: var(--border-radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: all 0.3s ease;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

.logo-item:hover {
  border-color: rgba(var(--accent-teal-rgb), 0.6);
  background: #ffffff;
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15), 0 0 15px rgba(var(--accent-teal-rgb), 0.25);
}

.logo-symbol {
  height: 60px;
  max-width: 90%;
  object-fit: contain;
  opacity: 1;
  transition: all 0.3s ease;
}

.logo-item:hover .logo-symbol {
  transform: scale(1.08);
}

.logo-emoji {
  font-size: 2.8rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  user-select: none;
}

.logo-item:hover .logo-emoji {
  transform: scale(1.1);
}

.logo-item span {
  font-weight: 600;
  font-size: 0.9rem;
  color: #1e293b;
  text-align: center;
  transition: color 0.3s ease;
  white-space: normal;
  word-break: keep-all;
  line-height: 1.3;
  max-width: 100%;
}

.logo-item:hover span {
  color: #0f172a;
}



/* 13. Testimonials Section */
/* 13. Testimonials Section - 3-Card Center-focused Carousel */
.testimonials-slider-container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  padding: 40px 0;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}

.testimonials-slider-container.active-drag {
  cursor: grabbing;
}

.testimonials-track {
  display: flex;
  align-items: center;
  transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
  will-change: transform;
}

.testimonial-card {
  flex: 0 0 620px;
  width: 620px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  backdrop-filter: var(--glass-blur);
  padding: 48px;
  border-radius: var(--border-radius-md);
  position: relative;
  margin: 0 20px;
  opacity: 0.45;
  transform: scale(0.9);
  transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1), 
              transform 0.5s cubic-bezier(0.25, 1, 0.5, 1), 
              border-color 0.3s ease;
  will-change: transform, opacity;
}

.testimonial-card.active {
  opacity: 1;
  transform: scale(1.02);
  border-color: var(--card-hover-border);
  box-shadow: var(--shadow-lg);
}

.quote-icon {
  position: absolute;
  top: 32px;
  left: 32px;
  font-size: 4rem;
  color: rgba(2, 195, 154, 0.08);
  pointer-events: none;
}

.testimonial-body {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 24px;
  position: relative;
  z-index: 2;
  font-weight: 400;
  color: var(--text-primary);
  word-break: keep-all;
}

.testimonial-author {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
}

.author-info h4 {
  font-size: 1.05rem;
  font-weight: 700;
}

.author-info p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.slider-controls {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 32px;
}

.ctrl-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.25s ease;
}

.ctrl-btn:hover {
  border-color: rgba(2, 195, 154, 0.3);
  color: var(--text-primary);
}

/* 14. Contact Section & CTA */
.contact-section {
  position: relative;
  z-index: 10;
}

.cta-box {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.7) 0%, rgba(8, 14, 30, 0.7) 100%);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  padding: 64px;
  backdrop-filter: var(--glass-blur);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.cta-box h3 {
  font-family: var(--font-title);
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-box p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px auto;
}

.contact-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--card-border);
  padding: 24px 16px;
  border-radius: var(--border-radius-md);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}

.contact-card:hover {
  border-color: var(--card-hover-border);
  background: var(--card-bg);
  transform: translateY(-4px);
}

.contact-card i {
  font-size: 1.75rem;
  color: var(--accent-teal);
  margin-bottom: 16px;
}

.contact-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  word-break: break-all;
}

.copy-btn {
  background: rgba(2, 195, 154, 0.1);
  border: 1px solid rgba(2, 195, 154, 0.2);
  color: var(--accent-teal);
  padding: 6px 12px;
  font-size: 0.75rem;
  border-radius: 4px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  background: var(--primary-teal);
  color: var(--text-primary);
  border-color: var(--primary-teal);
}

/* 통합 문의 및 견적 요청 폼 스타일 */
.contact-form-widget {
  max-width: 650px;
  margin: 0 auto 48px auto;
  background: rgba(15, 23, 42, 0.45);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 32px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--glass-blur);
}

.form-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 12px;
}

.form-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 600;
  padding: 8px 16px;
  cursor: pointer;
  position: relative;
  transition: all 0.25s ease;
}

.form-tab-btn:hover {
  color: var(--text-primary);
}

.form-tab-btn::after {
  content: '';
  position: absolute;
  bottom: -13px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-teal);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.form-tab-btn.active {
  color: var(--text-primary);
}

.form-tab-btn.active::after {
  transform: scaleX(1);
}

.contact-form {
  display: none;
}

.contact-form.active {
  display: block;
  animation: formFadeIn 0.4s ease-out;
}

@keyframes formFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group.full-width {
  grid-column: span 2;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-group .required {
  color: #ef4444;
  margin-left: 2px;
}
.form-group .optional { color: var(--text-muted); font-size: .78rem; font-weight: 500; }
.consent-row { display:flex;align-items:flex-start;gap:10px;color:var(--text-secondary);font-size:.84rem;line-height:1.55;text-align:left; }
.consent-row input { width:18px;height:18px;margin-top:2px;accent-color:var(--primary-teal);flex:0 0 auto; }
.consent-row a { color:var(--accent-teal);text-decoration:underline;text-underline-offset:2px; }

/* 스팸 봇 차단용 허니팟 필드. 화면에서 완전히 제거하되 봇이 읽는 DOM에는 남겨둡니다.
   display:none 은 일부 봇이 건너뛰므로 위치 이동 방식을 사용합니다. */
.hp-field { position:absolute;left:-9999px;width:1px;height:1px;opacity:0;pointer-events:none; }

/* 무료 도구 페이지 하단의 상담 전환 블록.
   원래 csv-encoding-converter.css 에만 있어 다른 도구 페이지에서 재사용할 수 없었습니다.
   .csv-next-step 은 기존 페이지 호환을 위해 함께 둡니다. */
.tool-next-step, .csv-next-step { margin-top:28px;padding:22px;border:1px solid rgba(202,138,4,.25);border-radius:14px;background:#fffbeb;text-align:center; }
.tool-next-step h2, .csv-next-step h2 { margin:0 0 8px;color:#713f12;font-size:1.08rem; }
.tool-next-step p, .csv-next-step p { margin:0 0 14px;color:#854d0e;font-size:.9rem;line-height:1.6; }

.form-group input,
.form-group textarea,
.form-group select {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--border-radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: all 0.25s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-teal);
  box-shadow: 0 0 10px rgba(2, 195, 154, 0.15);
}

/* RPA Light Theme Form Control Overrides */
body.rpa-light-theme .form-group input,
body.rpa-light-theme .form-group textarea,
body.rpa-light-theme .form-group select {
  background: #F8FAFC;
  border: 1px solid #CBD5E1;
  color: #0F172A;
}

body.rpa-light-theme .form-group input::placeholder,
body.rpa-light-theme .form-group textarea::placeholder {
  color: #94A3B8;
}

body.rpa-light-theme .form-group input:focus,
body.rpa-light-theme .form-group textarea:focus,
body.rpa-light-theme .form-group select:focus {
  background: #FFFFFF;
  border-color: var(--color-gold);
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.2);
}

body.rpa-light-theme .submit-btn {
  color: #FFFFFF;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
  padding-right: 40px;
}

.submit-btn {
  width: 100%;
  background: var(--primary-teal);
  color: var(--text-primary);
  border: none;
  border-radius: var(--border-radius-sm);
  padding: 14px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 12px rgba(2, 195, 154, 0.2);
}

.submit-btn:hover {
  background: var(--accent-teal);
  box-shadow: 0 6px 16px rgba(2, 195, 154, 0.35);
  transform: translateY(-1px);
}

.submit-btn:disabled {
  background: #1e293b;
  color: var(--text-muted);
  box-shadow: none;
  transform: none;
  cursor: not-allowed;
}

/* 태블릿/모바일 반응형 최적화 */
@media (max-width: 900px) {
  .contact-form-widget {
    padding: 20px;
  }
  .form-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .form-group.full-width {
    grid-column: span 1;
  }
}

/* 테마별 액센트 컬러 보정 (골드 테마 대응) */
body:not(.theme-teal) .form-tab-btn::after {
  background-color: var(--accent-gold);
}
body:not(.theme-teal) .form-group input:focus,
body:not(.theme-teal) .form-group textarea:focus,
body:not(.theme-teal) .form-group select:focus {
  border-color: var(--accent-gold);
  box-shadow: 0 0 10px rgba(229, 193, 88, 0.15);
}
body:not(.theme-teal) .submit-btn {
  background: var(--primary-gold);
  color: #060B19;
  box-shadow: 0 4px 12px rgba(197, 168, 128, 0.2);
}
body:not(.theme-teal) .submit-btn:hover {
  background: var(--accent-gold);
  box-shadow: 0 6px 16px rgba(229, 193, 88, 0.35);
}
body:not(.theme-teal) .submit-btn:disabled {
  background: #1e293b;
  color: var(--text-muted);
  box-shadow: none;
}

/* 15. Footer */
footer {
  border-top: 1px solid var(--card-border);
  padding: 48px 0;
  text-align: center;
  background-color: rgba(8, 14, 30, 0.5);
  color: var(--text-muted);
  font-size: 0.9rem;
}

footer .footer-logo {
  font-family: 'Pretendard', sans-serif;
  font-weight: 700; /* Pretendard Bold */
  letter-spacing: -0.04em;
  color: var(--text-primary);
  font-size: 1.45rem; /* 헤더와 동일하게 통일 */
  margin-bottom: 16px;
  display: flex; /* flex 정렬 적용 */
  align-items: center;
  justify-content: center;
  gap: 8px; /* 헤더와 동일하게 통일 */
}

footer .footer-logo .logo-symbol {
  height: 26px; /* 헤더와 동일하게 통일 (글자 크기의 약 90% 시각 밸런스) */
  width: 26px; /* 헤더와 동일하게 통일 */
  flex-shrink: 0; /* 찌그러짐 방지 */
  object-fit: contain;
  opacity: 0.8;
  transition: opacity 0.3s ease, transform 0.3s ease;
  transform: translateY(0.5px);
}

footer .footer-logo:hover .logo-symbol {
  opacity: 1;
  transform: scale(1.05) translateY(0.5px);
}

footer .footer-logo span {
  color: var(--text-primary);
}

footer .footer-logo span strong {
  color: var(--accent-teal);
  font-weight: 800;
}

/* 16. 반응형 대응 (Media Queries) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 56px;
    text-align: center;
  }
  
  .hero-content {
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .bio-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  
  .strengths-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .strength-card-span-2 {
    grid-column: span 1;
  }
  
  .contact-options {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-color);
    border-bottom: 1px solid var(--card-border);
    padding: 16px 24px;
    gap: 0;
    box-shadow: var(--shadow-lg);
    z-index: 99;
  }
  
  .nav-links.mobile-active {
    display: flex;
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .nav-link {
    display: block;
    padding: 12px 0;
    font-size: 1.05rem;
    width: 100%;
  }

  .nav-link.nav-cta {
    margin-top: 8px;
    padding: 12px;
  }
  
  .nav-link::after {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .section {
    padding: 80px 0;
  }
  
  .book-highlight {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    text-align: center;
  }
  
  .book-stats {
    justify-content: center;
  }
  
  .curriculum-cards {
    grid-template-columns: 1fr;
  }
  
  .testimonial-card {
    flex: 0 0 calc(100vw - 80px);
    width: calc(100vw - 80px);
    padding: 32px 24px;
    margin: 0 10px;
  }
}

@media (max-width: 500px) {
  .contact-options {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
}

/* 17. 테마 전환 토글 버튼 */
.theme-toggle-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(var(--accent-teal-rgb), 0.3);
  color: var(--accent-teal);
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle-btn:hover {
  background: rgba(var(--accent-teal-rgb), 0.15);
  border-color: var(--accent-teal);
  transform: scale(1.1) rotate(15deg);
  box-shadow: 0 0 15px rgba(var(--accent-teal-rgb), 0.4);
}

.theme-toggle-btn:active {
  transform: scale(0.95);
}

/* 모바일 반응형 여백 및 크기 보정 */
@media (max-width: 768px) {
  .theme-toggle-btn {
    bottom: 20px;
    left: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }
}

/* 데스크탑 뷰포트에서 5대 강점 아코디언 상시 전개 및 정렬 보정 */
@media (min-width: 1024px) {
  .strengths-accordion .accordion-item {
    cursor: default;
  }
  .strengths-accordion .accordion-item .accordion-arrow {
    display: none; /* 토글 화살표 숨김 */
  }
  .strengths-accordion .accordion-item .accordion-content {
    grid-template-rows: 1fr !important; /* 상시 펼침 */
    opacity: 1 !important;
    overflow: visible !important;
  }
  .strengths-accordion .accordion-item:hover {
    border-color: var(--card-hover-border);
    box-shadow: var(--shadow-glow);
  }
  .strengths-accordion .accordion-item .accordion-icon {
    background: var(--primary-teal);
    color: var(--text-primary);
    box-shadow: 0 0 10px rgba(var(--primary-teal-rgb), 0.3);
  }
}
.faq-container{max-width:900px}.faq-list{display:grid;gap:12px}.faq-list details{border:1px solid var(--card-border);border-radius:12px;background:var(--card-bg)}.faq-list summary{position:relative;padding:20px 52px 20px 22px;color:var(--text-primary);font-weight:700;cursor:pointer;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);color:var(--accent-teal);font-size:1.35rem}.faq-list details[open] summary::after{content:"−"}.faq-list details p{margin:0;padding:0 22px 22px;color:var(--text-secondary);line-height:1.75}.faq-list summary:focus-visible{outline:2px solid var(--accent-teal);outline-offset:3px;border-radius:10px}