:root {
  --navy: #0d1b2a;
  --navy-2: #1b2a41;
  --accent: #2f6fed;
  --accent-soft: #e8f0fe;
  --text: #22303e;
  --text-muted: #5b6b7b;
  --bg: #ffffff;
  --bg-alt: #f5f8fb;
  --border: #e3e9f0;
  --radius: 14px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  font-family: "Noto Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── 내비게이션 ─────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--navy);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #1a4fc4);
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
}

.brand-text {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text small {
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent);
}

/* ── 히어로 ─────────────────────────────── */
.hero {
  background:
    radial-gradient(ellipse at 20% 0%, rgba(47, 111, 237, 0.28), transparent 55%),
    radial-gradient(ellipse at 90% 100%, rgba(47, 111, 237, 0.18), transparent 50%),
    linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%);
  color: #fff;
  padding: 120px 0 130px;
  text-align: center;
}

.hero-eyebrow {
  color: #8fb4ff;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.35;
  margin-bottom: 22px;
}

.hero-sub {
  color: #c4d2e3;
  font-size: 1.05rem;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(47, 111, 237, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(47, 111, 237, 0.5);
}

.btn-ghost {
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* ── 섹션 공통 ──────────────────────────── */
.section {
  padding: 90px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-title {
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--navy);
  text-align: center;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 18px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 44px;
  height: 4px;
  border-radius: 2px;
  background: var(--accent);
}

.section-lead {
  text-align: center;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 52px;
}

/* ── 회사소개 ───────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.about-item {
  text-align: center;
  padding: 32px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.about-item h3 {
  color: var(--accent);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.about-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ── 사업영역 카드 ──────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(13, 27, 42, 0.1);
}

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.93rem;
  margin-bottom: 16px;
}

.card ul {
  list-style: none;
}

.card li {
  font-size: 0.9rem;
  color: var(--text);
  padding: 5px 0 5px 20px;
  position: relative;
}

.card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 14px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── 문의 ───────────────────────────────── */
.contact-box {
  max-width: 520px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 40px;
  background: #fff;
  box-shadow: 0 8px 26px rgba(13, 27, 42, 0.06);
}

.contact-row {
  display: flex;
  align-items: baseline;
  gap: 20px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-label {
  flex: 0 0 80px;
  font-weight: 700;
  color: var(--navy);
  font-size: 0.92rem;
}

.contact-row a {
  color: var(--accent);
  text-decoration: none;
}

.contact-row a:hover {
  text-decoration: underline;
}

/* ── 푸터 ───────────────────────────────── */
.footer {
  background: var(--navy);
  color: #9fb0c3;
  text-align: center;
  padding: 40px 0;
  font-size: 0.88rem;
}

.footer-sub {
  margin-top: 6px;
  font-size: 0.8rem;
  color: #6b7f95;
}

/* ── 반응형 ─────────────────────────────── */
@media (max-width: 820px) {
  .about-grid,
  .cards {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 90px 0 100px;
  }

  .nav-links {
    gap: 16px;
  }

  .brand-text small {
    display: none;
  }

  .contact-box {
    padding: 28px 24px;
  }
}