:root {
  --primary: #2563EB;
  --accent: #06B6D4;
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --text: #0F172A;
  --radius: 16px;
  --max: 960px;
}

* { box-sizing: border-box; }

html { font-display: swap; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Pretendard Variable', 'Pretendard', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

h1, h2, h3 {
  font-family: 'Pretendard Variable', 'Pretendard', sans-serif;
  font-weight: 800;
  color: var(--text);
  line-height: 1.35;
}

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

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

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

.section-inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: 48px 20px;
  position: relative;
}

/* Header */
.site-header {
  border-bottom: 1px solid #E2E8F0;
  position: sticky;
  top: 0;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(6px);
  z-index: 20;
}

.header-inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.wordmark {
  font-weight: 800;
  color: var(--primary);
  font-size: 1.1rem;
  letter-spacing: 0.03em;
}

.hamburger {
  background: none;
  border: none;
  display: none;
  cursor: pointer;
  padding: 6px;
}

.main-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
}

.main-nav a:hover { color: var(--primary); }

@media (max-width: 720px) {
  .hamburger { display: block; }
  .main-nav {
    display: none;
    width: 100%;
    order: 3;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding-top: 10px;
  }
  .main-nav ul li {
    border-top: 1px solid #E2E8F0;
  }
  .main-nav ul li a {
    display: block;
    padding: 12px 4px;
  }
  .main-nav.is-open { display: block; }
}

/* Hero: text left, gradient blobs right */
.hero {
  position: relative;
  padding: 72px 20px 88px;
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max);
  margin-inline: auto;
  position: relative;
  z-index: 2;
  max-width: 620px;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(4px);
  z-index: 1;
}

.hero-blob--a {
  width: 420px;
  height: 420px;
  right: -120px;
  top: -80px;
  background: radial-gradient(circle at 30% 30%, #06B6D4, #2563EB 70%);
  opacity: 0.85;
}

.hero-blob--b {
  width: 240px;
  height: 240px;
  right: 60px;
  bottom: -60px;
  background: radial-gradient(circle at 40% 40%, #93C5FD, #06B6D4 80%);
  opacity: 0.6;
}

@media (max-width: 720px) {
  .hero-blob--a { width: 260px; height: 260px; right: -100px; top: -60px; }
  .hero-blob--b { display: none; }
}

.hero-eyebrow {
  display: inline-block;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  margin: 0 0 12px;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 2.6rem);
  margin: 0 0 18px;
}

.hero-lead {
  margin: 0 0 28px;
  font-size: 1.05rem;
  color: #334155;
}

/* CTA buttons */
.cta {
  display: inline-block;
  text-decoration: none;
  border: none;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 999px;
  padding: 14px 28px;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.32);
}

.cta--large {
  font-size: 1.05rem;
  padding: 16px 32px;
}

/* Section numbering */
.content-section { border-top: 1px solid #E2E8F0; }

.content-section--card .section-inner {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  margin: 32px auto;
  padding: 40px clamp(20px, 5vw, 48px);
}

.content-section--card { border-top: none; }

.section-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 800;
  margin-bottom: 12px;
}

.content-section h2 {
  font-size: 1.4rem;
  margin: 0 0 16px;
}

/* Table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  font-size: 0.95rem;
  border-radius: 12px;
  overflow: hidden;
}

.spec-table th, .spec-table td {
  border: 1px solid #E2E8F0;
  padding: 12px 14px;
  text-align: left;
}

.spec-table thead th {
  background: #EFF6FF;
  color: var(--primary);
}

/* Branch / callout boxes */
.branch-box {
  display: grid;
  gap: 16px;
  margin-top: 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.branch-item {
  background: var(--card);
  border-radius: 14px;
  padding: 20px 22px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  border-top: 3px solid var(--accent);
}

.branch-item h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--primary);
}

.branch-item p { margin: 0; color: #334155; }

/* Checklist */
.checklist {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 12px;
}

.checklist li {
  padding-left: 32px;
  position: relative;
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

/* FAQ */
.faq-list {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

.faq-list details {
  background: #F1F5F9;
  border-radius: 12px;
  padding: 16px 20px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--primary);
}

.faq-list p {
  margin: 12px 0 0;
  color: #334155;
}

/* Images */
.shot {
  margin-inline: auto;
  max-width: 480px;
  padding: 0 20px;
}

.shot img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
}

.shot figcaption {
  font-size: 0.9rem;
  color: #64748B;
  margin-top: 10px;
  text-align: center;
}

/* CTA block (bottom) */
.cta-block {
  background: linear-gradient(135deg, #EFF6FF, #ECFEFF);
  text-align: center;
}

.cta-heading {
  font-size: 1.5rem;
  margin: 0 0 12px;
  font-weight: 800;
}

.cta-block p { color: #334155; }

/* Related links */
.related-heading {
  font-size: 1.4rem;
  margin: 0 0 16px;
}

.related-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.related-list a {
  display: block;
  background: var(--card);
  border-radius: 12px;
  padding: 16px 20px;
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  transition: transform 0.15s ease;
}

.related-list a:hover { transform: translateY(-2px); }

/* Footer */
footer {
  background: #0F172A;
  color: #E2E8F0;
  margin-top: 24px;
}

footer address {
  font-style: normal;
  line-height: 1.8;
}

footer small {
  display: block;
  margin-top: 16px;
  opacity: 0.7;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}