/* ========================================
   밸류업 랜딩페이지 — 공통 스타일
   ======================================== */

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary: #4A9BF5;
  --color-primary-dark: #3A85E0;
  --color-primary-light: #EBF2FF;
  --color-accent: #FFD966;
  --color-accent-light: #FFF8E1;
  --color-text: #1A1A1A;
  --color-text-secondary: #6B7280;
  --color-text-muted: #9CA3AF;
  --color-bg: #F7F8FA;
  --color-bg-white: #FFFFFF;
  --color-bg-light: #FFFFFF;
  --color-border: #E5E8EB;
  --color-success: #34C759;
  --color-icon-bg: #EBF2FF;
  --max-width: 1080px;
  --header-height: 64px;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.06);
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: break-word;
  letter-spacing: -0.01em;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* Container */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* Typography */
h1, h2, h3, h4 { line-height: 1.35; font-weight: 800; letter-spacing: -0.02em; }
h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.375rem; }

strong, b { font-weight: 700; }

/* Highlight text */
.text-primary { color: var(--color-primary); }
.text-bold { font-weight: 800; }

/* ========================================
   Header / Navigation
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav__logo {
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-primary);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  transition: background var(--transition), transform var(--transition);
}

.nav__cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  margin: 5px 0;
  transition: all 0.3s ease;
  border-radius: 2px;
}

.nav__toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu Overlay */
.mobile-menu {
  display: none;
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: #FFFFFF;
  padding: 8px 20px 20px;
  z-index: 999;
  overflow-y: auto;
  animation: menuSlideDown 0.2s ease;
}

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

.mobile-menu__link {
  display: block;
  padding: 18px 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text) !important;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu__link:active {
  color: var(--color-primary) !important;
}

.mobile-menu__cta {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  padding: 16px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn--outline {
  background: var(--color-bg-white);
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn--large {
  padding: 18px 40px;
  font-size: 1.0625rem;
}

.btn--arrow::after {
  content: '\2192';
  font-size: 1.1em;
}

/* ========================================
   Sections
   ======================================== */
section { padding: 80px 0; }
section:nth-child(even):not(.cta-section) { background: var(--color-bg-light); }

.section__label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.section__title {
  font-size: 2.125rem;
  margin-bottom: 16px;
  font-weight: 800;
}

.section__desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.8;
}

.section__center { text-align: center; }
.section__center .section__desc { margin-left: auto; margin-right: auto; }

/* ========================================
   Hero Section
   ======================================== */
.hero {
  padding: 100px 0 80px;
  background: var(--color-bg-white);
}

.hero__content { max-width: 720px; margin: 0 auto; text-align: center; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--color-primary-light);
  border: none;
  border-radius: 100px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.hero h1 {
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  font-size: 2.75rem;
  font-weight: 800;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-primary);
}

.hero__sub {
  font-size: 1.1875rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 48px;
}

/* Trust Indicators */
.trust-bar {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.trust-bar__item {
  display: flex;
  flex-direction: column;
}

.trust-bar__number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.trust-bar__label {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-top: 4px;
}

/* ========================================
   Cards
   ======================================== */
.card-grid {
  display: grid;
  gap: 24px;
}

.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card-grid--6 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--color-bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 32px;
  transition: all var(--transition);
  text-align: center;
}

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

.card__icon {
  width: 56px;
  height: 56px;
  background: var(--color-icon-bg);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin: 0 auto 16px;
}

.card__title {
  font-size: 1.1875rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.card__highlight {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 12px;
}

.card__link:hover { text-decoration: underline; }
.card__link::after { content: '\2192'; }

/* Revenue Case Cards */
.case-card {
  background: var(--color-bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition);
}

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

.case-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-primary);
}

/* Case card image */
.case-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  filter: saturate(0.7) brightness(0.95);
  transition: filter var(--transition);
}

.case-card:hover .case-card__img {
  filter: saturate(1) brightness(1);
}

.case-card__type {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 10px;
  border-radius: 6px;
  display: inline-block;
  margin-bottom: 12px;
}

.case-card__revenue {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}

.case-card__revenue em {
  font-style: normal;
  color: var(--color-primary);
  font-weight: 800;
}

.case-card__location {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.case-card__detail {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========================================
   Process Steps
   ======================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  text-align: center;
  position: relative;
}

.step__number {
  width: 52px;
  height: 52px;
  background: var(--color-icon-bg);
  color: var(--color-primary);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  font-weight: 800;
  margin: 0 auto 16px;
}

.step__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step__desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* Step connector line */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 24px;
  left: calc(50% + 32px);
  width: calc(100% - 64px);
  height: 2px;
  background: var(--color-border);
}

/* ========================================
   Comparison Table
   ======================================== */
.comparison {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-white);
}

.comparison table {
  width: 100%;
  border-collapse: collapse;
}

.comparison th,
.comparison td {
  padding: 16px 20px;
  text-align: left;
  font-size: 0.9375rem;
  border-bottom: 1px solid var(--color-border);
}

.comparison thead th {
  background: var(--color-bg-light);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.comparison th:first-child { width: 120px; white-space: nowrap; }
.comparison th:nth-child(2) { width: auto; }
.comparison th:nth-child(3) { width: auto; }

/* 항목 컬럼 — 줄바꿈 방지 */
.comparison td:first-child {
  white-space: nowrap;
  font-size: 0.875rem;
}

/* 직접 운영 컬럼 — 작고 흐리게 */
.comparison td:nth-child(2) {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* 밸류업 컬럼 — 크고 강조 */
.comparison .highlight-col {
  background: var(--color-primary-light);
  font-weight: 700;
  font-size: 1rem;
}

.comparison thead .highlight-col {
  background: var(--color-primary);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 800;
}

.comparison .check { color: var(--color-success); font-weight: 800; font-size: 1.125rem; }
.comparison .cross { color: var(--color-text-muted); }

/* Mobile comparison: hidden on desktop */
.comparison--mobile { display: none; }

/* Mobile comparison cards */
.compare-card {
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 12px;
}

.compare-card__label {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 12px;
}

.compare-card__row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.compare-card__row--old {
  color: var(--color-text-muted);
  background: var(--color-bg);
  margin-bottom: 8px;
  font-size: 0.875rem;
}

.compare-card__row--new {
  color: var(--color-text);
  background: var(--color-primary-light);
  font-weight: 600;
}

.compare-card__tag {
  flex-shrink: 0;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--color-border);
  color: var(--color-text-muted);
  margin-top: 2px;
}

.compare-card__tag--primary {
  background: var(--color-primary);
  color: #fff;
}

/* ========================================
   FAQ Accordion
   ======================================== */
.faq-list { max-width: 800px; margin: 0 auto; text-align: left; }

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child { border-top: 1px solid var(--color-border); }

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  line-height: 1.5;
  font-family: inherit;
  letter-spacing: -0.01em;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-text-muted);
  transition: transform var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.open .faq-question::after {
  content: '\2212';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer__inner {
  padding: 0 0 20px;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
  padding: 80px 0;
  background: var(--color-primary) !important;
  color: #fff !important;
  text-align: center;
}

.cta-section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}

.cta-section p {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.9);
  margin-bottom: 32px;
}

.cta-section .btn--primary {
  background: #fff;
  color: var(--color-primary);
  font-weight: 700;
}

.cta-section .btn--primary:hover {
  background: #f0f4ff;
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  padding: 40px 0;
  background: #F5F5F5;
  border-top: 1px solid var(--color-border);
}

.footer__info {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.footer__info strong {
  color: var(--color-text-secondary);
}

.footer__copyright {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ========================================
   Floating CTA (Mobile)
   ======================================== */
.floating-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 12px 20px calc(12px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
}

.floating-cta .btn { width: 100%; border-radius: var(--radius-sm); }

/* ========================================
   Breadcrumb
   ======================================== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb span { margin: 0 8px; }

/* ========================================
   Sub-page Hero (smaller)
   ======================================== */
.hero--sub {
  padding: 60px 0 40px;
}

.hero--sub h1 { font-size: 2rem; }

.hero--sub .hero__content {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.hero--sub .hero__actions {
  justify-content: center;
}

/* ========================================
   Content Sections for Sub-pages
   ======================================== */
.content-block {
  padding: 60px 0;
}

.content-block h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.content-block p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.info-box {
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}

.info-box p {
  color: var(--color-text);
  margin-bottom: 0;
  font-size: 0.9375rem;
}

.condition-list {
  margin: 16px auto;
  display: inline-block;
  text-align: left;
}

.condition-list li {
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.condition-list li::before {
  content: '\2713';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
}

/* ========================================
   Responsive
   ======================================== */
/* ========================================
   Tablet (768px 이하)
   ======================================== */
@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.625rem; }
  h3 { font-size: 1.1875rem; }
  section { padding: 56px 0; }

  .container { padding: 0 20px; }

  /* Hero */
  .hero { padding: 48px 0 36px; }
  .hero h1 { font-size: 2rem; }
  .hero__sub { font-size: 1.0625rem; line-height: 1.75; margin-bottom: 28px; }
  .hero__actions { flex-direction: column; gap: 10px; }
  .hero__actions .btn { width: 100%; padding: 16px; font-size: 1rem; }
  .hero--sub { padding: 40px 0 28px; }
  .hero--sub h1 { font-size: 1.75rem; }

  /* Trust bar */
  .trust-bar { gap: 24px; }
  .trust-bar__number { font-size: 1.5rem; }

  /* Navigation */
  .nav__links { display: none; }
  .nav__toggle { display: block; }

  /* nav__links는 모바일에서 숨기고 mobile-menu 오버레이 사용 */

  /* Cards */
  .card-grid--3,
  .card-grid--6 { grid-template-columns: 1fr; }
  .card-grid--2 { grid-template-columns: 1fr; }
  .card { padding: 24px; }
  .card__title { font-size: 1.125rem; }
  .card__desc { font-size: 0.9375rem; line-height: 1.7; }

  /* Case cards */
  .case-card { padding: 24px; }
  .case-card__revenue { font-size: 1.625rem; }
  .case-card__detail { font-size: 0.875rem; line-height: 1.7; }

  /* Steps */
  .steps { grid-template-columns: 1fr 1fr; gap: 24px; }
  .step:not(:last-child)::after { display: none; }
  .step__title { font-size: 1rem; }
  .step__desc { font-size: 0.875rem; line-height: 1.6; }

  /* Comparison: 테이블 숨기고 카드 표시 */
  .comparison--desktop { display: none; }
  .comparison--mobile { display: block; }

  /* Section titles */
  .section__title { font-size: 1.625rem; }
  .section__desc { font-size: 1rem; margin-bottom: 36px; }

  /* CTA */
  .cta-section h2 { font-size: 1.625rem; }
  .cta-section p { font-size: 1rem; }

  /* FAQ */
  .faq-question { font-size: 1rem; padding: 18px 0; }
  .faq-answer__inner { font-size: 0.9375rem; }

  /* Floating CTA */
  .floating-cta { display: block; }
  body { padding-bottom: 80px; }

  /* Content blocks */
  .content-block { padding: 48px 0; }
  .content-block h2 { font-size: 1.5rem; }
}

/* ========================================
   Mobile (480px 이하)
   ======================================== */
@media (max-width: 480px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  section { padding: 44px 0; }

  .container { padding: 0 16px; }

  .hero { padding: 36px 0 28px; }
  .hero h1 { font-size: 1.75rem; }
  .hero__badge { font-size: 0.75rem; padding: 5px 12px; }
  .hero__sub { font-size: 1rem; }

  .trust-bar { flex-direction: row; gap: 0; justify-content: space-between; }
  .trust-bar__item { align-items: center; flex: 1; }
  .trust-bar__number { font-size: 1.625rem; }
  .trust-bar__label { font-size: 0.8125rem; }

  .card-grid--6 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .card-grid--6 .card { padding: 20px 16px; text-align: center; }
  .card-grid--6 .card__icon { margin: 0 auto 12px; width: 44px; height: 44px; font-size: 1.25rem; }
  .card-grid--6 .card__title { font-size: 0.9375rem; }
  .card-grid--6 .card__desc { font-size: 0.8125rem; }

  .card-grid--3 { gap: 12px; }

  .steps { grid-template-columns: 1fr 1fr; gap: 16px; }
  .step__number { width: 44px; height: 44px; font-size: 1rem; }

  .section__title { font-size: 1.375rem; }
  .section__label { font-size: 0.75rem; }

  .case-card__revenue { font-size: 1.375rem; }

  .cta-section { padding: 56px 0; }
  .cta-section h2 { font-size: 1.375rem; }

  .btn--large { padding: 16px 24px; font-size: 1rem; }

}