:root {
  --c-primary: #0B1120;
  --c-second: #1E293B;
  --c-bg: #0F172A;
  --c-text: #E2E8F0;
  --c-accent: #38BDF8;
  --c-muted: #94A3B8;
  --radius: 8px;
  --maxw: 720px;
  --leading: 1.60;
  --header-h: 72px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: "Noto Sans KR", -apple-system, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: var(--leading);
  padding-top: var(--header-h);
}

h1, h2, .h2-num, .brandmark span {
  font-family: "Do Hyeon", "Noto Sans KR", sans-serif;
}

a { color: inherit; }
img { max-width: 100%; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--c-accent);
  color: #0B1120;
  padding: 10px 16px;
  z-index: 300;
  font-weight: 700;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
}

/* ---------- Header: translucent blur ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-h);
  background: rgba(11, 17, 32, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--c-text);
  z-index: 200;
}

.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brandmark {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  color: var(--c-accent);
}
.brandmark span {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--c-muted);
  white-space: nowrap;
}

.header-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.header-nav a {
  text-decoration: none;
  color: #CBD5E1;
  font-size: 0.88rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.header-nav a:hover,
.header-nav a:focus-visible {
  border-bottom-color: var(--c-accent);
  color: var(--c-text);
}

.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--c-text);
  cursor: pointer;
  padding: 6px;
}

/* ---------- Main / full-screen section stack ---------- */
.main {
  width: 100%;
}

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 68px 24px 44px;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(56,189,248,0.14), transparent);
}
.hero-eyebrow {
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 700;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 2.7rem);
  margin: 0 0 16px;
  color: var(--c-text);
}
.hero-sub {
  font-size: 1.02rem;
  color: #CBD5E1;
  margin: 0 0 32px;
  max-width: 560px;
}

/* Hero visual: night time-axis line */
.night-axis {
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: var(--radius);
  padding: 26px 22px 20px;
  margin-bottom: 8px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}
.axis-track {
  position: relative;
  height: 3px;
  background: rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  margin: 6px 6px 0;
}
.axis-highlight {
  position: absolute;
  top: -3px;
  left: 22%;
  width: 56%;
  height: 9px;
  background: linear-gradient(90deg, var(--c-accent), #7DD3FC);
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(56,189,248,0.55);
  display: block;
}
.axis-points {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
}
.axis-points span {
  font-size: 0.78rem;
  color: var(--c-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
}
.axis-points span::before {
  content: "";
  width: 2px;
  height: 10px;
  background: #475569;
}
.axis-points span.on { color: var(--c-text); font-weight: 700; }
.axis-points span.on::before { background: var(--c-accent); }
.axis-caption {
  font-size: 0.8rem;
  color: var(--c-muted);
  margin: 16px 0 0;
}

/* CTA group */
.cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 28px 0 8px;
}
.cta-group--mid {
  max-width: var(--maxw);
  margin: 44px auto;
  padding: 0 24px;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.92rem;
  box-shadow: 0 8px 22px rgba(0,0,0,0.4);
  transition: transform 0.2s ease, background 0.2s ease;
}
.cta--call {
  background: var(--c-accent);
  color: #0B1120;
}
.cta--call:hover { background: #7DD3FC; }
.cta--sms {
  background: rgba(30, 41, 59, 0.7);
  color: var(--c-text);
  border: 1.5px solid rgba(148, 163, 184, 0.4);
}
.cta--sms:hover { background: rgba(30, 41, 59, 0.95); }
.cta:hover { transform: translateY(-2px); }

/* ---------- Full-bleed alternating section stack ---------- */
section.content-block {
  width: 100%;
  padding: 56px 0;
  position: relative;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
section.content-block.in-view {
  opacity: 1;
  transform: translateY(0);
}
section.content-block:nth-of-type(even) {
  background: var(--c-second);
}
section.content-block::before {
  content: "";
  display: block;
  height: 2px;
  max-width: var(--maxw);
  margin: 0 auto 40px;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
}

.content-block > .h2-row,
.content-block > p,
.content-block > ul,
.content-block > table,
.content-block > .related-links {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.h2-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 0 auto 18px;
}
.h2-num {
  font-size: 2rem;
  color: var(--c-accent);
  line-height: 1;
  flex-shrink: 0;
}
.content-block h2 {
  font-size: 1.4rem;
  color: var(--c-text);
  margin: 0;
}
.content-block p { margin: 0 auto 14px; color: #E2E8F0; }
.content-block ul { margin: 0 auto 14px; padding-left: 20px; padding-right: 24px; }
.content-block li { margin-bottom: 8px; color: #E2E8F0; }

table.night-table {
  width: calc(100% - 48px);
  border-collapse: collapse;
  margin: 8px auto 18px;
  font-size: 0.88rem;
  box-shadow: 0 10px 26px rgba(0,0,0,0.32);
  border-radius: var(--radius);
  overflow: hidden;
}
table.night-table th, table.night-table td {
  border: 1px solid rgba(148, 163, 184, 0.18);
  padding: 12px 14px;
  text-align: left;
}
table.night-table th {
  background: rgba(56, 189, 248, 0.14);
  color: var(--c-text);
}
table.night-table td { color: #CBD5E1; }

/* Photo row */
.photo-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1080px;
  margin: 8px auto 8px;
  padding: 0 24px;
}
.photo-row figure { margin: 0; }
.photo-row img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  border-radius: var(--radius);
  box-shadow: 0 10px 26px rgba(0,0,0,0.4);
}
.photo-row figcaption {
  font-size: 0.8rem;
  color: var(--c-muted);
  margin-top: 8px;
}

/* related links */
.related-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 20px auto 6px;
}
.related-links a {
  text-decoration: none;
  background: rgba(56, 189, 248, 0.12);
  color: var(--c-accent);
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 0.86rem;
  border: 1px solid rgba(56, 189, 248, 0.3);
}
.related-links a:hover { background: rgba(56, 189, 248, 0.22); }

/* Footer */
.site-footer {
  background: var(--c-primary);
  border-top: 1px solid rgba(148, 163, 184, 0.18);
  padding: 40px 0 60px;
}
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.footer-brand {
  font-weight: 700;
  color: var(--c-text);
  margin: 0 0 12px;
  font-family: "Do Hyeon", sans-serif;
}
.footer-biz {
  display: grid;
  grid-template-columns: 108px 1fr;
  row-gap: 6px;
  margin: 0 0 16px;
  font-size: 0.84rem;
  color: #CBD5E1;
}
.footer-biz dt { font-weight: 600; color: var(--c-muted); }
.footer-biz dd { margin: 0; }
.footer-biz a { color: var(--c-accent); text-decoration: underline; }
.footer-copy { font-size: 0.76rem; color: var(--c-muted); margin: 0; }

/* Mobile overlay nav */
.mobile-overlay { display: none; }

@media (max-width: 1024px) {
  .header-nav { display: none; }
  .hamburger-btn { display: inline-flex; }
  .mobile-overlay.open {
    display: flex;
    position: fixed;
    inset: 0;
    background: var(--c-primary);
    z-index: 300;
    flex-direction: column;
    padding: 28px 24px;
    gap: 6px;
  }
  .mobile-overlay a {
    color: var(--c-text);
    text-decoration: none;
    font-size: 1.1rem;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
  }
  .mobile-overlay .close-btn {
    align-self: flex-end;
    background: none;
    border: none;
    color: var(--c-text);
    cursor: pointer;
    margin-bottom: 12px;
  }
}

@media (max-width: 768px) {
  .photo-row { grid-template-columns: 1fr; max-width: 460px; }
  .footer-biz { grid-template-columns: 92px 1fr; }
  .brandmark span { display: none; }
  .axis-points span { font-size: 0.68rem; }
}

@media (max-width: 480px) {
  .hero { padding: 44px 20px 32px; }
  .cta-group { flex-direction: column; }
  .cta { justify-content: center; }
  section.content-block { padding: 40px 0; }
}