:root {
  --bg: #edf2f1;
  --bg-soft: #f8fbfa;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --line: #d6e2df;
  --line-strong: #c3d4d0;
  --text: #14303f;
  --muted: #5c6f79;
  --accent: #135a70;
  --accent-strong: #0f4658;
  --accent-soft: #dceff0;
  --shadow: 0 18px 45px rgba(20, 48, 63, 0.08);
  --shadow-soft: 0 10px 24px rgba(20, 48, 63, 0.05);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max-width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Noto Sans KR", sans-serif;
  line-height: 1.7;
  background:
    radial-gradient(circle at top left, rgba(19, 90, 112, 0.08), transparent 24%),
    radial-gradient(circle at 88% 10%, rgba(192, 216, 210, 0.2), transparent 20%),
    linear-gradient(180deg, #eef4f2 0%, #f6f8f7 32%, #edf1ef 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 48, 63, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 48, 63, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.35), transparent 88%);
}

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

img {
  max-width: 100%;
}

button,
input,
textarea {
  font: inherit;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Outfit", "Noto Sans KR", sans-serif;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

p {
  margin: 0;
}

.skip-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus,
.skip-link:focus-visible {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 30;
  width: auto;
  height: auto;
  margin: 0;
  padding: 0.8rem 1rem;
  clip: auto;
  clip-path: none;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow);
}

.site-shell {
  position: relative;
  z-index: 1;
}

.site-header,
.hero,
.page-hero,
.section,
.site-footer {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-soft);
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.site-header.is-scrolled {
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.9rem;
  height: 2.9rem;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 22px rgba(19, 90, 112, 0.2);
}

.brand-copy {
  display: grid;
  gap: 0.05rem;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0 0.25rem;
}

.nav-link,
.header-cta,
.text-link,
.button {
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}

.nav-link {
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 0.75rem 1rem;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
}

.header-cta:hover,
.header-cta:focus-visible,
.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.hero,
.page-hero {
  padding-top: clamp(3rem, 6vw, 5rem);
}

.hero-home {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 1.25rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.card,
.cta-band,
.policy-article,
.contact-card,
.form-card,
.content-block {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 250, 249, 0.94));
  box-shadow: var(--shadow);
}

.hero-copy,
.hero-panel,
.page-hero,
.cta-band,
.policy-article,
.content-block {
  border-radius: var(--radius-lg);
}

.hero-copy,
.hero-panel,
.page-hero,
.policy-article,
.content-block {
  padding: clamp(1.6rem, 4vw, 2.8rem);
}

.page-hero {
  display: grid;
  gap: 1rem;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero-copy h1,
.page-hero h1 {
  max-width: 16ch;
  font-size: clamp(2.6rem, 5vw, 4.8rem);
}

.article-hero h1 {
  max-width: 18ch;
  font-size: clamp(2.4rem, 4.6vw, 4rem);
}

.lead {
  max-width: 60rem;
  color: var(--text);
  font-size: 1.08rem;
}

.hero-copy .lead {
  max-width: 38rem;
  margin-top: 1rem;
}

.hero-panel {
  display: grid;
  gap: 1rem;
}

.hero-panel h2,
.section-heading h2,
.cta-band h2,
.policy-article h1 {
  font-size: clamp(1.75rem, 3vw, 2.7rem);
}

.compact-grid,
.card-grid,
.article-layout,
.stack-section,
.split-list,
.footer-grid,
.contact-layout,
.project-meta-group {
  display: grid;
  gap: 1rem;
}

.compact-grid {
  grid-template-columns: repeat(1, minmax(0, 1fr));
  margin-top: 0.5rem;
}

.section {
  padding: 4.4rem 0 0;
}

.section-heading {
  display: grid;
  gap: 0.65rem;
  max-width: 56rem;
}

.section-heading.with-link {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
}

.section-heading.with-link > div {
  display: grid;
  gap: 0.65rem;
}

.card-grid {
  margin-top: 1.8rem;
}

.card-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  position: relative;
  overflow: hidden;
  padding: 1.35rem;
  border-radius: var(--radius-md);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.card:hover,
.card:focus-within {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 32px rgba(20, 48, 63, 0.09);
}

.card::before,
.hero-copy::before,
.hero-panel::before,
.cta-band::before {
  content: "";
  position: absolute;
  inset: auto -12% 72% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(19, 90, 112, 0.08), transparent 72%);
  pointer-events: none;
}

.card h2,
.card h3,
.cta-band h2,
.policy-section h2,
.article-section h2 {
  margin-bottom: 0.7rem;
}

.card p,
.hero-panel p,
.section-heading p,
.content-block p,
.policy-section p,
.article-section p,
.article-meta,
.footer-summary,
.copyright,
.form-status {
  color: var(--muted);
}

.card-meta,
.article-meta {
  font-size: 0.9rem;
  color: var(--accent);
}

.check-list,
.bullet-list,
.tag-list,
.footer-links,
.article-bullets,
.toc-list {
  margin: 0;
  padding: 0;
}

.check-list,
.bullet-list,
.article-bullets {
  display: grid;
  gap: 0.7rem;
  padding-left: 1.2rem;
}

.check-list {
  margin-top: 1.4rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  margin-top: 1rem;
}

.tag-list li {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #eff6f5;
  color: var(--accent-strong);
  font-size: 0.86rem;
  line-height: 1.3;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.7rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.1rem;
  padding: 0.85rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
}

.button-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.button-secondary {
  background: #fff;
  color: var(--accent-strong);
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--accent);
  font-weight: 700;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--accent-strong);
}

.split-list,
.project-meta-group {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1rem;
}

.impact-box,
.note-box,
.intro-block {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
}

.faq-list {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

.faq-item {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-soft);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin-top: 0.8rem;
}

.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.8rem 2rem;
}

.blog-card h2,
.project-detail-card h2,
.service-detail-card h2 {
  font-size: 1.45rem;
}

.article-hero {
  width: min(calc(100% - 2rem), var(--max-width));
  margin-inline: auto;
  padding-top: clamp(3rem, 6vw, 5rem);
  display: grid;
  gap: 0.8rem;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.article-layout {
  grid-template-columns: minmax(250px, 300px) minmax(0, 1fr);
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 6.6rem;
  display: grid;
  gap: 1rem;
}

.sticky-card {
  box-shadow: var(--shadow-soft);
}

.article-body {
  display: grid;
  gap: 1.2rem;
}

.article-section {
  padding: 1.5rem 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.93);
  box-shadow: var(--shadow-soft);
}

.article-section h2 {
  margin-bottom: 0.8rem;
}

.article-section p + p,
.policy-section p + p {
  margin-top: 0.9rem;
}

.toc-list {
  padding-left: 1.2rem;
  color: var(--muted);
}

.toc-list li + li {
  margin-top: 0.45rem;
}

.toc-list a:hover,
.toc-list a:focus-visible {
  color: var(--accent);
}

.contact-layout {
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  margin-top: 1.8rem;
}

.contact-card,
.form-card {
  padding: 1.5rem;
  border-radius: var(--radius-md);
}

.contact-mail {
  margin-top: 1rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
}

.contact-form {
  display: grid;
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.45rem;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fdfefe;
  color: var(--text);
}

.contact-form input:focus,
.contact-form textarea:focus,
.button:focus-visible,
.nav-link:focus-visible,
.menu-toggle:focus-visible,
.header-cta:focus-visible,
.text-link:focus-visible,
.faq-item summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.policy-article {
  display: grid;
  gap: 1.5rem;
}

.policy-section + .policy-section {
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.footer-grid {
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  padding: 4rem 0 1.5rem;
}

.footer-eyebrow {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer-links {
  display: grid;
  gap: 0.55rem;
  list-style: none;
  margin-top: 0.9rem;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
}

.copyright {
  padding: 1rem 0 2.2rem;
  border-top: 1px solid rgba(20, 48, 63, 0.08);
  font-size: 0.92rem;
}

@media (max-width: 1100px) {
  .card-grid-3,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-home,
  .article-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

  .section-heading.with-link {
    flex-direction: column;
    align-items: start;
  }
}

@media (max-width: 920px) {
  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.7rem);
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    width: min(300px, calc(100vw - 2rem));
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .site-nav[data-open="true"] {
    display: flex;
  }

  .site-nav .nav-link {
    border-radius: 18px;
  }

  .header-cta {
    display: none;
  }

  .card-grid-2,
  .split-list,
  .project-meta-group {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .page-hero,
  .section,
  .site-footer,
  .article-hero {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .site-header {
    padding: 0.85rem 1rem;
  }

  .brand-copy span {
    display: none;
  }

  .hero-copy,
  .hero-panel,
  .page-hero,
  .cta-band,
  .policy-article,
  .card,
  .contact-card,
  .form-card {
    border-radius: 22px;
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: clamp(2.25rem, 12vw, 3.4rem);
  }

  .card-grid-3,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .cta-band,
  .hero-actions,
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button {
    width: 100%;
  }

  .section {
    padding-top: 3.2rem;
  }
}