/* === Tokens === */
:root {
  --color-primary: #0369A1;
  --color-secondary: #0EA5E9;
  --color-accent: #CA8A04;
  --color-neutral-dark: #0C4A6E;
  --color-neutral-light: #F0F9FF;
  --color-bg: #ffffff;
  --color-text: #0C4A6E;
  --color-muted: #4A6478;
  --font-heading: 'Noto Serif KR', serif;
  --font-body: 'Noto Sans KR', sans-serif;
  --wrap: 1120px;
  --wrap-narrow: 720px;
  --radius: 12px;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
ul { padding: 0; margin: 0; list-style: none; }
h1, h2, h3 { font-family: var(--font-heading); font-weight: 700; line-height: 1.25; margin: 0 0 1rem; color: var(--color-neutral-dark); }
h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }

/* === Layout === */
.container { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 1.25rem; }
.container--narrow { max-width: var(--wrap-narrow); }

/* === Header === */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(12,74,110,0.08);
  z-index: 50;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: .75rem;
}
.logo { display: inline-flex; align-items: center; }
.logo img { height: 72px; width: auto; display: block; }
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid rgba(12,74,110,0.15);
  border-radius: 8px;
  cursor: pointer;
  padding: 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--color-neutral-dark); border-radius: 2px; }
.primary-nav { display: none; }
.primary-nav.is-open { display: block; position: absolute; top: 100%; left: 0; right: 0; background: #fff; border-bottom: 1px solid rgba(12,74,110,0.08); padding: 1rem 1.25rem; }
.primary-nav ul { display: flex; flex-direction: column; gap: .75rem; }
.primary-nav a { color: var(--color-neutral-dark); font-weight: 500; }
.primary-nav a[aria-current="page"] { color: var(--color-primary); text-decoration: underline; text-underline-offset: 4px; }

/* === Hero === */
.hero { padding-block: 3rem; text-align: center; background: linear-gradient(180deg, var(--color-neutral-light) 0%, #ffffff 100%); }
.hero h1 { max-width: 22ch; margin-inline: auto; letter-spacing: -0.01em; }
.hero__sub { max-width: 48ch; margin: 0 auto 2rem; color: var(--color-muted); font-size: 1.125rem; }
.hero__cta { margin-bottom: 2.5rem; }
.hero__image { margin: 2.5rem 0 0; }
.hero__image img { border-radius: var(--radius); aspect-ratio: 16/9; object-fit: cover; width: 100%; }

/* === Buttons === */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  padding: .85rem 1.6rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  font-size: 1rem;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-neutral-dark); text-decoration: none; }
.btn--accent { background: var(--color-accent); color: #fff; }
.btn--accent:hover { filter: brightness(0.94); text-decoration: none; }

/* === Sections === */
.section { padding-block: 3rem; }
.section--intro { text-align: left; }
.section--intro.alt { background: var(--color-neutral-light); }
.section__title { text-align: center; margin-bottom: 2rem; }
.section__lede { text-align: center; max-width: 60ch; margin: 0 auto 2rem; color: var(--color-muted); }

/* === Grids === */
.grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; }

/* === Cards === */
.card {
  background: #fff;
  border: 1px solid rgba(12,74,110,0.08);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--color-neutral-light);
  color: var(--color-primary);
  margin-bottom: .75rem;
}
.card h3 { color: var(--color-neutral-dark); }
.card p { color: var(--color-muted); margin: 0; }
a.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}
a.card-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -30px rgba(12,74,110,0.35);
  text-decoration: none;
}

/* === Testimonial === */
.testimonial {
  text-align: center;
  font-family: var(--font-heading);
  margin: 0;
  padding: 2rem 0;
  border-top: 1px solid rgba(12,74,110,0.1);
  border-bottom: 1px solid rgba(12,74,110,0.1);
}
.testimonial p {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--color-neutral-dark);
  max-width: 40ch;
  margin: 0 auto 1rem;
}
.testimonial cite {
  font-style: normal;
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--color-muted);
}

/* === CTA band === */
.cta-band {
  background: var(--color-primary);
  color: #fff;
  padding-block: 3rem;
  text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.9); }

/* === Article === */
.article {
  max-width: 65ch;
  margin-inline: auto;
  padding: 3rem 1.25rem;
}
.article__header .eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: .8rem;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.article__header h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.15; margin-bottom: 1.25rem; }
.article__sub { font-size: 1.15rem; color: var(--color-muted); }
.article__hero img { aspect-ratio: 16/9; object-fit: cover; border-radius: 8px; margin-block: 2rem; }
.article h2 { margin-top: 2.5rem; margin-bottom: 1rem; }
.article p { font-size: 1.075rem; line-height: 1.8; margin-block: 1.25rem; }
.article__footer { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid rgba(12,74,110,0.12); }
.back-link { font-weight: 500; }

/* === Form === */
.contact-form { display: grid; gap: 1rem; }
.form-row { display: grid; gap: .4rem; }
.form-row label { font-weight: 500; color: var(--color-neutral-dark); }
.form-row input, .form-row textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: .7rem .85rem;
  border: 1px solid rgba(12,74,110,0.2);
  border-radius: 8px;
  background: #fff;
  color: var(--color-text);
}
.form-row input:focus, .form-row textarea:focus { outline: 2px solid var(--color-secondary); outline-offset: 1px; border-color: var(--color-secondary); }
.form-consent { display: flex; gap: .6rem; align-items: flex-start; font-size: .9rem; color: var(--color-muted); flex-wrap: wrap; }
.form-consent input { margin-top: .25rem; }

/* === Footer === */
.site-footer {
  background: var(--color-neutral-dark);
  color: var(--color-neutral-light);
  padding-block: 3rem 1.5rem;
  margin-top: 3rem;
}
.site-footer a { color: var(--color-neutral-light); }
.site-footer a:hover { color: #fff; }
.site-footer__grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.footer__title { font-size: 1rem; color: #fff; margin-bottom: .75rem; }
.site-footer nav ul, .footer__legal { display: grid; gap: .5rem; }
.site-footer address { font-style: normal; margin-bottom: .75rem; line-height: 1.7; }
.site-footer__bottom { border-top: 1px solid rgba(240,249,255,0.15); margin-top: 2rem; padding-top: 1rem; text-align: center; font-size: .85rem; color: rgba(240,249,255,0.75); }
.logo--footer img { height: 60px; }

/* === Cookie banner === */
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: none;
  z-index: 9999;
  background: var(--color-neutral-dark);
  color: var(--color-neutral-light);
  padding: 1.25rem;
  border-radius: var(--radius);
  box-shadow: 0 30px 60px -20px rgba(0,0,0,0.4);
  max-width: 640px;
  margin-inline: auto;
}
.cookie-banner.is-visible { display: block; }
.cookie-banner p { margin: 0 0 .85rem; font-size: .92rem; }
.cookie-banner__actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.cookie-banner button {
  font-family: var(--font-body);
  font-size: .9rem;
  padding: .55rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(240,249,255,0.3);
  background: transparent;
  color: var(--color-neutral-light);
  cursor: pointer;
}
.cookie-banner [data-cookie-accept] { background: var(--color-accent); border-color: var(--color-accent); color: #fff; font-weight: 700; }
.cookie-banner__prefs { margin-top: .9rem; display: grid; gap: .5rem; }
.cookie-banner__prefs label { display: flex; gap: .5rem; align-items: center; font-size: .9rem; }
.cookie-banner__prefs [data-cookie-save] { justify-self: start; margin-top: .35rem; background: var(--color-neutral-light); color: var(--color-neutral-dark); border-color: var(--color-neutral-light); font-weight: 700; }

/* === Responsive === */
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .logo img { height: 96px; }
  .logo--footer img { height: 72px; }
  .hero { padding-block: 5rem; }
  .section { padding-block: 4.5rem; }
  .cta-band { padding-block: 4.5rem; }
  .nav-toggle { display: none; }
  .primary-nav { display: block; position: static; padding: 0; background: transparent; border: 0; }
  .primary-nav ul { flex-direction: row; gap: 1.75rem; }
  .site-footer__grid { grid-template-columns: 1.4fr 1fr 1.3fr; gap: 3rem; }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 1024px) {
  .hero { padding-block: 6rem; }
}