@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+KR:wght@400;500;700&family=Nanum+Gothic:wght@400;700&display=swap");

:root {
  --c-primary: #3730A3;
  --c-second: #818CF8;
  --c-bg: #F5F3FF;
  --c-text: #1E1B4B;
  --c-accent: #14B8A6;
  --radius: 0px;
  --maxw: 1280px;
  --leading: 1.75;
  --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: "Nanum Gothic", "Pretendard Variable", sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: var(--leading);
}

h1, h2, .brand-mark span {
  font-family: "IBM Plex Sans KR", "Nanum Gothic", sans-serif;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--c-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

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

/* ---------- Header: left logo + right CTA ---------- */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid #DDD6FE;
  z-index: 100;
}
.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: 100%;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-primary);
  flex-shrink: 0;
}
.brand-mark span {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.main-nav {
  display: flex;
  gap: 4px;
  margin-left: 12px;
  flex: 1;
}
.main-nav a {
  text-decoration: none;
  color: var(--c-text);
  font-size: 0.9rem;
  padding: 10px 12px;
  border-radius: var(--radius);
}
.main-nav a:hover,
.main-nav a:focus-visible {
  background: var(--c-bg);
  color: var(--c-primary);
}

.header-cta { flex-shrink: 0; }
.hamburger-btn { display: none; }

/* ---------- Main content ---------- */
.main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px 80px;
}

.hero {
  padding: 56px 0 36px;
}
.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 700;
  margin: 0 0 14px;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin: 0 0 18px;
  color: var(--c-primary);
}
.hero-sub {
  font-size: 1.05rem;
  color: #443F7A;
  max-width: 680px;
  margin: 0 0 32px;
}

/* ---------- Hero: proportional area-scale bars ---------- */
.area-scale {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0 0 28px;
  max-width: 780px;
}
.scale-row {
  display: flex;
  align-items: center;
  gap: 16px;
}
.scale-label {
  width: 96px;
  flex-shrink: 0;
  font-weight: 700;
  color: var(--c-primary);
  font-size: 0.92rem;
}
.scale-bar-track {
  flex: 1;
  background: #fff;
  border: 1px solid var(--c-second);
  height: 26px;
  display: block;
  border-radius: var(--radius);
}
.scale-bar-fill {
  display: block;
  height: 100%;
  background: var(--c-second);
}
.scale-10 .scale-bar-fill { width: 12%; }
.scale-30 .scale-bar-fill { width: 32%; }
.scale-50 .scale-bar-fill { width: 55%; }
.scale-100 .scale-bar-fill { width: 92%; background: var(--c-primary); }
.scale-desc {
  width: 180px;
  flex-shrink: 0;
  font-size: 0.82rem;
  color: #5B5599;
}

/* CTA group */
.cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 28px 0 8px;
}
.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.94rem;
}
.cta--call {
  background: var(--c-primary);
  color: #fff;
}
.cta--sms {
  background: #fff;
  color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}
.cta:hover { opacity: 0.86; }

/* Sections: hairline divider, uppercase-eyebrow h2 style */
section.content-block {
  padding: 44px 0;
  border-top: 1px solid #DDD6FE;
}
section.content-block:first-of-type { border-top: none; }

.content-block .eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  font-weight: 700;
  margin: 0 0 10px;
}
.content-block h2 {
  font-size: 1.5rem;
  color: var(--c-primary);
  margin: 0 0 16px;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}
.content-block p { margin: 0 0 14px; color: #2C2760; }
.content-block ul { margin: 0 0 14px; padding-left: 20px; }
.content-block li { margin-bottom: 8px; }

/* Box comparison grid (area-proportional layout) */
.area-box-grid {
  display: grid;
  grid-template-columns: 1fr 2fr 3fr 4fr;
  gap: 14px;
  margin: 20px 0 28px;
}
.area-box {
  background: #fff;
  border: 1px solid var(--c-second);
  border-radius: var(--radius);
  padding: 16px 14px;
}
.area-box .box-tag {
  display: block;
  font-weight: 700;
  color: var(--c-primary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}
.area-box p {
  margin: 0;
  font-size: 0.82rem;
  color: #443F7A;
}
.box-100 { background: #EEF2FF; }

table.area-table {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 20px;
  font-size: 0.92rem;
}
table.area-table th, table.area-table td {
  border: 1px solid #DDD6FE;
  padding: 12px 14px;
  text-align: left;
}
table.area-table th {
  background: #EEF2FF;
  color: var(--c-primary);
}

/* Photo row */
.photo-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin: 20px 0 8px;
}
.photo-row figure { margin: 0; }
.photo-row img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  display: block;
  border-radius: var(--radius);
}
.photo-row figcaption {
  font-size: 0.82rem;
  color: #5B5599;
  margin-top: 8px;
}

/* related links */
.related-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.related-links a {
  text-decoration: none;
  background: #fff;
  border: 1px solid #DDD6FE;
  color: var(--c-primary);
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 0.88rem;
}
.related-links a:hover { background: #EEF2FF; }

/* Footer */
.site-footer {
  border-top: 1px solid #DDD6FE;
  padding: 40px 0 60px;
}
.footer-inner { max-width: 640px; margin: 0 auto; padding: 0 32px; }
.footer-brand {
  font-weight: 700;
  color: var(--c-primary);
  margin: 0 0 12px;
}
.footer-biz {
  display: grid;
  grid-template-columns: 100px 1fr;
  row-gap: 6px;
  margin: 0 0 16px;
  font-size: 0.85rem;
  color: #4B4680;
}
.footer-biz dt { font-weight: 600; color: #6B65A0; }
.footer-biz dd { margin: 0; }
.footer-biz a { color: var(--c-primary); text-decoration: underline; }
.footer-copy { font-size: 0.78rem; color: #8B85B8; margin: 0; }

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

@media (max-width: 1024px) {
  .main-nav { display: none; }
  .header-cta { display: none; }
  .hamburger-btn {
    display: inline-flex;
    background: transparent;
    border: none;
    color: var(--c-primary);
    cursor: pointer;
    padding: 6px;
    margin-left: auto;
  }
  .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: #fff;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 14px 4px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
  }
  .mobile-overlay .close-btn {
    align-self: flex-end;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    margin-bottom: 12px;
  }
  .area-box-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .photo-row { grid-template-columns: repeat(2, 1fr); }
  .scale-desc { display: none; }
  .area-box-grid { grid-template-columns: 1fr; }
  .footer-biz { grid-template-columns: 90px 1fr; }
}

@media (max-width: 480px) {
  .hero { padding: 40px 0 24px; }
  .cta-group { flex-direction: column; }
  .cta { justify-content: center; }
  .photo-row { grid-template-columns: 1fr; }
  .scale-label { width: 72px; font-size: 0.82rem; }
}

/* Scroll reveal (single animation type for this page) */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}