:root {
  --primary: #212F45;
  --primary-light: #34456A;
  --accent: #D62828;
  --accent-dark: #A61E1E;
  --ink: #1B1F27;
  --paper: #FFFFFF;
  --bg: #F2F4F8;
  --line: #D8DCE4;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Malgun Gothic", sans-serif;
  font-display: swap;
  color: var(--ink);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--primary); }

h1, h2, h3 { color: var(--primary); line-height: 1.35; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Header */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  padding: 10px 4px;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.main-nav a {
  color: #E7EAF2;
  text-decoration: none;
  font-size: 0.92rem;
  padding: 12px 10px;
  min-height: 44px;
  display: flex;
  align-items: center;
  border-radius: 6px;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  background: rgba(255,255,255,0.12);
  color: #fff;
}

/* Hero */
.hero {
  background: linear-gradient(160deg, var(--primary) 0%, var(--primary-light) 100%);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  align-items: center;
  gap: 32px;
  padding: 48px 20px;
}

.hero-text {
  max-width: 560px;
  margin: 0 auto;
  padding-left: max(20px, calc(50vw - 600px));
}

.eyebrow {
  color: var(--accent);
  background: #fff;
  display: inline-block;
  font-weight: 700;
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: 999px;
  margin: 0 0 14px;
}

.hero h1 {
  color: #fff;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  margin: 0 0 14px;
}

.hero .lede {
  color: #DDE2ED;
  font-size: 1.02rem;
  margin: 0 0 22px;
}

.btn, .cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 26px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  border-radius: 8px;
  border: 2px solid var(--accent);
  transition: background 0.15s, color 0.15s;
}

.btn:hover, .btn:focus-visible,
.cta-button:hover, .cta-button:focus-visible {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.hero-media {
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(0,0,0,0.28);
  padding-right: max(20px, calc(50vw - 600px));
}

.hero-media img { width: 100%; }

/* Layout wrap */
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 28px 28px 30px;
  box-shadow: 0 2px 10px rgba(33,47,69,0.06);
}

.card h2 {
  font-size: 1.35rem;
  margin: 0 0 14px;
  padding-left: 14px;
  border-left: 5px solid var(--accent);
}

.card p { margin: 0 0 14px; }
.card p:last-child { margin-bottom: 0; }

.block-sub {
  color: #5B6578;
  font-size: 0.92rem;
}

/* Checklist cards */
.checklist-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.checklist-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 20px 22px;
}

.checklist-card h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  color: var(--primary);
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.checklist li {
  position: relative;
  padding-left: 30px;
  font-size: 0.96rem;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  border-radius: 5px;
  background: var(--accent);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' width='14' height='14'%3E%3Cpath fill='none' stroke='%23fff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M4 12l5 5L20 6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.gallery-grid picture {
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
}

/* CTA section */
.cta-section {
  background: var(--primary);
  border-radius: 14px;
  padding: 32px 28px;
  text-align: center;
  color: #fff;
}

.cta-section h2 {
  color: #fff;
  margin: 0 0 10px;
  font-size: 1.3rem;
}

.cta-section p {
  color: #DDE2ED;
  margin: 0 0 20px;
}

/* Footer */
footer {
  background: #16202F;
  color: #C9D0DE;
  padding: 40px 20px 30px;
}

footer nav {
  max-width: 1000px;
  margin: 0 auto 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 4px;
}

footer nav a {
  color: #C9D0DE;
  text-decoration: none;
  font-size: 0.88rem;
  padding: 10px 10px;
  min-height: 44px;
  display: flex;
  align-items: center;
  border-radius: 6px;
}

footer nav a:hover,
footer nav a:focus-visible {
  background: rgba(255,255,255,0.08);
  color: #fff;
}

footer address {
  max-width: 1000px;
  margin: 0 auto;
  font-style: normal;
  font-size: 0.88rem;
  line-height: 1.8;
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: 20px;
}

footer address a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

footer p {
  max-width: 1000px;
  margin: 16px auto 0;
  font-size: 0.8rem;
  color: #8A93A6;
}

/* Breakpoints */
@media (max-width: 1024px) {
  .hero-text { padding-left: 20px; }
  .hero-media { padding-right: 20px; }
}

@media (max-width: 768px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 36px 20px;
  }
  .hero-text, .hero-media { padding-left: 0; padding-right: 0; }
  .checklist-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .card { padding: 22px 18px 24px; }
  .hero h1 { font-size: 1.5rem; }
  .btn, .cta-button { width: 100%; }
}

@media (min-width: 1280px) {
  .wrap { max-width: 960px; }
}