@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700;800&display=swap');

/* ============================================
   Design tokens — Construction/Architecture palette
   (industrial grey + safety orange), Trust & Authority style
   ============================================ */
:root {
  --color-primary: #334155;        /* 짙은 슬레이트 - 헤더/본문 강조 */
  --color-primary-dark: #1E293B;   /* 히어로/푸터 배경 */
  --color-on-primary: #FFFFFF;
  --color-secondary: #64748B;      /* 인더스트리얼 그레이 */
  --color-accent: #EA580C;         /* 세이프티 오렌지 - CTA 전용 */
  --color-accent-hover: #C2410C;
  --color-background: #F8FAFC;
  --color-foreground: #1E293B;
  --color-card: #FFFFFF;
  --color-muted: #EBF0F5;
  --color-muted-foreground: #64748B;
  --color-border: #E2E8F0;
  --color-destructive: #DC2626;
  --color-ring: #334155;

  --font-heading: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;
  --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --container-max: 1160px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #0F172A;
    --color-foreground: #E2E8F0;
    --color-card: #1E293B;
    --color-muted: #1E293B;
    --color-muted-foreground: #94A3B8;
    --color-border: #334155;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-background);
  color: var(--color-foreground);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden; /* 개별 요소가 실수로 뷰포트를 넘겨도 페이지 전체 가로 스크롤은 막음 */
}

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

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 var(--space-2);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(28px, 4.5vw, 44px); }
h2 { font-size: clamp(24px, 3.2vw, 32px); }
h3 { font-size: 20px; }

.section > .container > h2 {
  position: relative;
  padding-bottom: 14px;
}
.section > .container > h2::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 56px; height: 4px;
  border-radius: 2px;
  background: var(--color-accent);
}

p { margin: 0 0 var(--space-2); color: var(--color-foreground); }

.section { padding: var(--space-6) 0; }
.section-muted { background: var(--color-muted); }
.section-dark {
  background: var(--color-primary-dark);
  color: #F1F5F9;
}
.section-dark h1, .section-dark h2, .section-dark h3, .section-dark p { color: #F1F5F9; }
.section-dark .muted-text { color: #CBD5E1; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  background: rgba(234, 88, 12, 0.1);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-2);
}
.section-dark .eyebrow { background: rgba(234, 88, 12, 0.18); }

.muted-text { color: var(--color-muted-foreground); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 16px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease, transform 150ms ease;
  touch-action: manipulation;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
}
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-outline {
  background: transparent;
  border-color: rgba(241, 245, 249, 0.4);
  color: inherit;
}
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  font-weight: 800;
  font-size: 20px;
  color: var(--color-primary);
}
.brand span { color: var(--color-accent); }
.main-nav { display: none; gap: var(--space-4); }
.main-nav a {
  font-weight: 500;
  font-size: 15px;
  color: var(--color-foreground);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 200ms ease, color 200ms ease;
}
.main-nav a:hover { color: var(--color-accent); border-color: var(--color-accent); }
.header-cta { display: flex; align-items: center; gap: var(--space-2); }
.header-cta .btn { min-height: 44px; padding: 0 16px; font-size: 14px; white-space: nowrap; }

@media (min-width: 768px) {
  .main-nav { display: flex; }
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-7) 0 var(--space-6);
  background: var(--color-primary-dark); /* 이미지 로드 전/실패 시 대체 배경 */
  color: #F1F5F9;
}
.hero-bg {
  position: absolute;
  top: -90px; left: 0; right: 0; bottom: -90px; /* 패럴랙스 이동 시 가장자리가 비지 않도록 여유분 확보 */
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.08);
  animation: heroKenBurns 18s ease-out forwards;
  will-change: transform;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.55) 0%, rgba(15, 23, 42, 0.78) 55%, rgba(15, 23, 42, 0.94) 100%);
}
@keyframes heroKenBurns {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}
.hero > .container { position: relative; z-index: 1; }
.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 64px;
  background: var(--color-background);
  clip-path: polygon(0 100%, 100% 40%, 100% 100%);
  z-index: 2;
}
@media (prefers-reduced-motion: reduce) {
  .hero-bg img { animation: none; transform: scale(1); }
}
.hero-grid {
  display: grid;
  gap: var(--space-5);
}
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; align-items: center; }
}
.hero h1 { color: #FFFFFF; }
.hero h1 .word-wrap { display: inline-block; overflow: hidden; vertical-align: top; }
.hero h1 .word { display: inline-block; will-change: transform; }
.hero-sub { font-size: 18px; color: #CBD5E1; max-width: 46ch; }
.hero-sub strong { color: #FFFFFF; font-weight: 700; }
.hero-cta-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-3); }

/* Self-check card */
.check-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.check-card h3 { color: #FFFFFF; margin-bottom: var(--space-2); }
.check-list { list-style: none; margin: 0 0 var(--space-3); padding: 0; display: grid; gap: 12px; }
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
  color: #E2E8F0;
}
.check-list svg { flex: none; margin-top: 2px; color: var(--color-accent); }

/* Cards / grid */
.grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}
@media (min-width: 640px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 200ms ease, border-color 200ms ease;
  transform-style: preserve-3d;
  will-change: transform;
}
.card:hover { box-shadow: var(--shadow-lg); border-color: var(--color-accent); }

.case-card-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-muted);
}
.case-card-media img { width: 100%; height: 100%; object-fit: cover; }
.case-card-body { padding: var(--space-3); }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.tag {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-secondary);
  background: var(--color-muted);
  padding: 3px 10px;
  border-radius: 999px;
}
.case-card-body h3 { font-size: 17px; margin-bottom: 6px; }
.case-card-body p { font-size: 14px; color: var(--color-muted-foreground); margin-bottom: 0; }

/* Process steps */
.process-list { display: grid; gap: var(--space-4); counter-reset: step; }
.process-item {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-card);
}
@media (min-width: 720px) {
  .process-item { grid-template-columns: 220px 1fr; align-items: start; }
}
.process-item-media { display: grid; gap: 8px; }
.process-item-media img { border-radius: var(--radius-md); aspect-ratio: 4/3; object-fit: cover; }
.process-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 999px;
  background: var(--color-accent);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 10px;
}

/* Comparison table — 넓은 표는 자체 스크롤 컨테이너 안에서만 가로 스크롤 */
.table-scroll { overflow-x: auto; border-radius: var(--radius-lg); -webkit-overflow-scrolling: touch; }
.compare-table { width: 100%; min-width: 480px; border-collapse: collapse; overflow: hidden; border-radius: var(--radius-lg); }
.compare-table th, .compare-table td {
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  text-align: left;
  font-size: 15px;
  vertical-align: top;
}
.compare-table th { background: var(--color-primary); color: #fff; font-weight: 700; }
.compare-table tr:nth-child(even) td { background: var(--color-muted); }

/* FAQ */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--color-card);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-3);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 22px;
  color: var(--color-accent);
  transition: transform 200ms ease;
  flex: none;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 var(--space-3) var(--space-3); color: var(--color-muted-foreground); }
.faq-item summary:focus-visible { outline: 3px solid var(--color-accent); outline-offset: -3px; }

/* Stats band */
.stats-band {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
  margin-top: 8px;
}
@media (min-width: 720px) { .stats-band { grid-template-columns: repeat(4, 1fr); } }
.stat-item { text-align: center; padding: var(--space-3) var(--space-2); }
.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.1;
}
.stat-label { margin-top: 6px; font-size: 14px; color: var(--color-muted-foreground); }
.section-dark .stat-label { color: #CBD5E1; }

/* Service area */
.area-list { display: flex; flex-wrap: wrap; gap: 10px; }
.area-pill {
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--color-muted);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--color-border);
}
.area-pill.active { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

/* Sticky mobile CTA bar */
.mobile-cta-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  gap: 10px;
  padding: 10px var(--space-2);
  padding-bottom: calc(10px + env(safe-area-inset-bottom));
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(15,23,42,0.08);
}
.mobile-cta-bar .btn { flex: 1; }
@media (min-width: 900px) { .mobile-cta-bar { display: none; } }
body { padding-bottom: 76px; }
@media (min-width: 900px) { body { padding-bottom: 0; } }

/* 스크롤을 따라다니는 우측 고정 문의 버튼 */
.float-actions {
  position: fixed;
  right: 20px;
  bottom: 96px;
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-btn {
  width: 52px;
  height: 52px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 18px;
  cursor: pointer;
  touch-action: manipulation;
  transition: transform 150ms ease, box-shadow 150ms ease;
}
.float-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.float-btn:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }
.float-btn-call { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.float-btn-blog { background: #03C75A; border-color: #03C75A; color: #fff; } /* 네이버 브랜드 그린 */

@media (max-width: 899px) {
  .float-actions { right: 14px; bottom: 84px; gap: 10px; }
  .float-btn { width: 46px; height: 46px; }
}
@media (prefers-reduced-motion: reduce) {
  .float-btn { transition: none; }
}

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: #CBD5E1;
  padding: var(--space-6) 0 var(--space-4);
  font-size: 14px;
}
.site-footer h4 { color: #fff; font-size: 15px; }
.footer-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; margin-bottom: var(--space-4); }
@media (min-width: 640px) { .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; } }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 1.3fr 1fr 1fr 1fr; } }
.footer-grid a { color: #CBD5E1; }
.footer-grid a:hover { color: var(--color-accent); }
.footer-grid p.muted-text { line-height: 2; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: var(--space-3);
  font-size: 13px;
  color: #94A3B8;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

/* Breadcrumb */
.breadcrumb { font-size: 13px; color: var(--color-muted-foreground); margin-bottom: var(--space-2); }
.breadcrumb a:hover { color: var(--color-accent); }

/* Filter bar (case list) */
.filter-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-4); }
.filter-btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-card);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-secondary);
  cursor: pointer;
  touch-action: manipulation;
  transition: all 150ms ease;
}
.filter-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.filter-btn.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.empty-state { text-align: center; padding: var(--space-6) 0; color: var(--color-muted-foreground); }

/* ============================================
   Scroll reveal — GSAP(js/main.js)이 opacity/transform을 직접 제어합니다.
   GSAP이 로드되지 않거나 prefers-reduced-motion이면 스크립트가 아예 실행되지
   않으므로 [data-reveal] 요소는 항상 기본 상태(완전히 보임)로 남습니다.
   ============================================ */