/* ===== Pretendard ===== */
@font-face {
  font-family: 'Pretendard';
  src: url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/woff2/Pretendard-Regular.woff2') format('woff2');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'Pretendard';
  src: url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/woff2/Pretendard-Medium.woff2') format('woff2');
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: 'Pretendard';
  src: url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/woff2/Pretendard-Bold.woff2') format('woff2');
  font-weight: 700;
  font-display: swap;
}

/* ===== Design tokens ===== */
:root {
  --bg: #FFFFFF;
  --bg-sub: #F4F6FA;
  --accent-btn: #A5B4FC;
  --accent-icon: #A5D6A7;
  --text: #0F172A;

  --space-side: 24px;
  --space-section: 48px;
  --gap-img-text: 16px;
  --radius-card: 12px;
  --touch-min: 44px;
  --icon-size: 24px;
  --btn-pad-x: 20px;

  --fs-body: 16px;
  --fs-h1: 29px;
  --fs-h2: 22px;
  --fs-h3: 18px;
  --lh: 1.6;
}

@media (min-width: 1024px) {
  :root {
    --space-side: 40px;
    --fs-h1: 44px;
    --fs-h2: 30px;
    --fs-h3: 22px;
  }
}

/* ===== Reset ===== */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Malgun Gothic', sans-serif;
  font-size: var(--fs-body);
  line-height: var(--lh);
  color: var(--text);
  background: var(--bg);
  word-break: keep-all;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }

h1, h2, h3, h4 { font-weight: 700; line-height: 1.35; margin: 0 0 12px; }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
p { margin: 0 0 16px; }
.subtitle { font-weight: 400; color: #475569; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--space-side);
}
.section { padding: var(--space-section) 0; }
.section-sub { background: var(--bg-sub); }
.section-head { margin-bottom: 32px; text-align: center; }
.section-head h2 { margin-bottom: 8px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--touch-min);
  padding: 10px var(--btn-pad-x);
  border-radius: var(--radius-card);
  background: var(--accent-btn);
  color: var(--text);
  font-weight: 700;
  border: none;
  white-space: nowrap;
}
.btn:active { filter: brightness(0.94); }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--accent-btn);
  color: var(--text);
}
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ===== Icons ===== */
.icon {
  width: var(--icon-size);
  height: var(--icon-size);
  flex-shrink: 0;
  fill: var(--accent-icon);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid #ECEBE3;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.site-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; }
.site-logo svg { width: 32px; height: 32px; }

.nav-pc { display: none; }
@media (min-width: 1024px) {
  .nav-pc { display: flex; align-items: center; gap: 28px; margin-left: auto; }
  .nav-pc a { display: flex; align-items: center; gap: 6px; font-weight: 500; min-height: var(--touch-min); }
  .nav-pc .btn { margin-left: 8px; }
}

.hamburger {
  width: var(--touch-min);
  height: var(--touch-min);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--text); transition: transform .25s, opacity .25s; }
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
@media (min-width: 1024px) { .hamburger { display: none; } }

.nav-mobile {
  overflow: hidden;
  max-height: 0;
  transition: max-height .3s ease;
  background: var(--bg);
  border-bottom: 1px solid #ECEBE3;
}
.nav-mobile.is-open { max-height: 320px; }
.nav-mobile ul { padding: 8px var(--space-side) 16px; }
.nav-mobile a { display: flex; align-items: center; gap: 10px; min-height: var(--touch-min); font-weight: 500; }
@media (min-width: 1024px) { .nav-mobile { display: none; } }

/* ===== Hero ===== */
.hero { position: relative; color: var(--text); }
.hero-media {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-body { padding: 28px var(--space-side) var(--space-section); }
.hero-body .subtitle { margin-bottom: 6px; display: block; }
.hero-body h1 { margin-bottom: 14px; }

@media (min-width: 1024px) {
  .hero-media { aspect-ratio: 21 / 9; }
  .hero-body {
    position: absolute;
    left: 60px;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 32px 36px;
    max-width: 480px;
    background: var(--bg);
    border-radius: var(--radius-card);
  }
}

/* ===== Cards / grid ===== */
.grid { display: grid; gap: 20px; 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); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-6 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  position: relative;
  display: block;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: #fff;
}
.card-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.card:hover .card-media img { transform: scale(1.06); }
.card-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(15,23,42,0) 40%, rgba(15,23,42,.72) 100%);
  opacity: 0;
  transition: opacity .3s ease;
  display: flex;
  align-items: flex-end;
  padding: var(--gap-img-text);
}
.card:hover .card-overlay, .card:focus-visible .card-overlay { opacity: 1; }
.card-overlay-title {
  color: #fff;
  font-weight: 700;
  transform: translateY(10px);
  transition: transform .3s ease;
}
.card:hover .card-overlay-title { transform: translateY(0); }
.card-body { padding: var(--gap-img-text); }
.card-body h3 { margin-bottom: 4px; }

.link-indicator {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
.link-indicator svg { width: 16px; height: 16px; fill: none; stroke: var(--text); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ===== Mobile swipe carousel ===== */
.swipe {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: var(--gap-img-text);
  padding-bottom: 4px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.swipe::-webkit-scrollbar { display: none; }
.swipe > * { flex: 0 0 100%; scroll-snap-align: start; }
@media (min-width: 900px) {
  .swipe { display: grid; overflow: visible; }
}
.dots { display: flex; justify-content: center; gap: 8px; margin-top: 16px; }
.dots span { width: 7px; height: 7px; border-radius: 50%; background: #D8DCE5; }
.dots span.is-active { background: var(--accent-btn); width: 18px; border-radius: 4px; }
@media (min-width: 900px) { .dots { display: none; } }

.hover-only { display: none; }
@media (min-width: 900px) {
  .hover-only {
    position: absolute; inset: 0; display: flex; align-items: flex-end; padding: var(--gap-img-text);
    background: linear-gradient(180deg, rgba(15,23,42,0) 40%, rgba(15,23,42,.78) 100%);
    opacity: 0; transition: opacity .3s ease;
  }
  .card:hover .hover-only, .card:focus-visible .hover-only { opacity: 1; }
  .mobile-only-desc { display: none; }
}

/* ===== Fade in ===== */
.fade-in { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.is-visible { opacity: 1; transform: none; }

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid #E4E2D8;
  padding: 4px 0;
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--touch-min);
  padding: 12px 0;
  font-weight: 700;
  list-style: none;
  cursor: pointer;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '';
  flex-shrink: 0;
  width: 12px; height: 12px;
  border-right: 2px solid var(--text);
  border-bottom: 2px solid var(--text);
  transform: rotate(45deg);
  transition: transform .25s ease;
}
.faq-item[open] summary::after { transform: rotate(-135deg); }
.faq-item .faq-a { padding: 0 0 16px; color: #334155; }

/* ===== Table (product spec) ===== */
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table th, .spec-table td {
  padding: 10px 12px;
  border-bottom: 1px solid #E4E2D8;
  text-align: left;
  font-size: 15px;
}
.spec-table th { width: 34%; color: #64748B; font-weight: 500; }
.table-scroll { overflow-x: auto; }

/* ===== CTA section ===== */
.cta-section {
  background: var(--text);
  color: #fff;
  text-align: center;
}
.cta-section h2 { margin-bottom: 8px; color: #fff; }
.cta-section .subtitle { color: #CBD5E1; }
.cta-section .btn-row { justify-content: center; margin-top: 20px; }
.cta-section .btn-outline { border-color: var(--accent-btn); color: #fff; }

/* ===== Footer ===== */
.site-footer { background: #0A0F1C; color: #fff; padding: var(--space-section) 0 24px; }
.footer-top { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; margin-bottom: 24px; }
.footer-info p { margin: 0 0 4px; font-size: 14px; color: #CBD5E1; }
.footer-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-nav a { display: flex; align-items: center; gap: 6px; min-height: var(--touch-min); font-size: 14px; color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); padding-top: 16px; font-size: 13px; color: #94A3B8; }

/* ===== Misc page content ===== */
.page-hero { padding-top: 40px; padding-bottom: 8px; }
.page-hero .subtitle { display: block; margin-bottom: 6px; }
.prose p { max-width: 720px; }
.prose h2 { margin-top: 36px; }
.value-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--bg-sub);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px;
}

@media (min-width: 900px) {
  .card { position: relative; }
}

/* ===== Page hero (service/case/totalcare/contact) ===== */
.page-media { position: relative; aspect-ratio: 16 / 8; overflow: hidden; border-radius: 0 0 var(--radius-card) var(--radius-card); }
.page-media img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 900px) { .page-media { aspect-ratio: 21 / 6; } }

/* ===== Service variant A: feature list ===== */
.feature-list { display: flex; flex-direction: column; gap: 20px; margin: 28px 0; }
.feature-item { display: flex; gap: var(--gap-img-text); padding: 20px; background: var(--bg-sub); border-radius: var(--radius-card); }
.feature-item .num { flex-shrink: 0; width: 36px; height: 36px; border-radius: 50%; background: var(--accent-icon); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.feature-item h3 { margin-bottom: 6px; }

/* ===== Service variant B: timeline ===== */
.timeline { display: flex; flex-direction: column; gap: 0; margin: 28px 0; }
.timeline-step { position: relative; padding: 0 0 28px 32px; border-left: 2px solid var(--accent-btn); }
.timeline-step:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline-step::before { content: ''; position: absolute; left: -7px; top: 2px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent-btn); }
.timeline-step h3 { margin-bottom: 6px; }
@media (min-width: 900px) {
  .timeline { flex-direction: row; gap: 20px; }
  .timeline-step { flex: 1; border-left: none; border-top: 2px solid var(--accent-btn); padding: 20px 0 0; }
  .timeline-step::before { left: 0; top: -7px; }
}

/* ===== Service variant C: 2-column compare ===== */
.compare-2col { display: grid; gap: 20px; margin: 28px 0; grid-template-columns: 1fr; }
@media (min-width: 900px) { .compare-2col { grid-template-columns: 1fr 1fr; } }
.compare-item { padding: 24px; border-radius: var(--radius-card); background: var(--bg-sub); }
.compare-item h3 { margin-bottom: 8px; }

/* ===== Case detail layouts ===== */
.case-meta { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0 24px; }
.case-meta span { padding: 6px 14px; border-radius: 999px; background: var(--bg-sub); font-size: 14px; }
.case-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; margin: 24px 0; }
@media (min-width: 900px) { .case-stats { grid-template-columns: repeat(4,1fr); } }
.case-stat { padding: 18px; border-radius: var(--radius-card); background: var(--bg-sub); text-align: center; }
.case-stat strong { display: block; font-size: 20px; margin-bottom: 4px; }
.case-quote { border-left: 3px solid var(--accent-btn); padding: 4px 0 4px 18px; margin: 24px 0; color: #334155; }
.case-gallery { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--gap-img-text); margin: 24px 0; }
.case-gallery img, .case-gallery .card-media { border-radius: var(--radius-card); }

/* ===== Sitemap page ===== */
.sitemap-list { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .sitemap-list { grid-template-columns: repeat(2,1fr); } }
.sitemap-list a { display: flex; align-items: center; gap: 10px; min-height: var(--touch-min); padding: 12px 16px; background: var(--bg-sub); border-radius: var(--radius-card); font-weight: 500; }
.sitemap-group h2 { margin-top: 32px; }