:root {
  --bg: #0f1220;
  --fg: #e8eaf3;
  --muted: #9aa0b8;
  --card: #181c30;
  --accent: linear-gradient(90deg, #ff5f6d, #ffc371, #47e0a0, #4facfe, #a06bff);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Pretendard", -apple-system, "Segoe UI", "Malgun Gothic", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
}

a { color: inherit; }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  max-width: 1080px;
  margin: 0 auto;
}

.logo { font-weight: 800; font-size: 1.3rem; text-decoration: none; }
nav a { margin-left: 20px; text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--fg); }

section { max-width: 1080px; margin: 0 auto; padding: 72px 24px; }
h2 { font-size: 1.6rem; margin-bottom: 16px; }

.hero { text-align: center; padding-top: 110px; padding-bottom: 110px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.3; }
.hero h1 span {
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--muted); margin: 20px 0 32px; }

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  background: var(--accent);
  color: #0f1220;
  font-weight: 700;
  text-decoration: none;
}

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.cards article { background: var(--card); padding: 24px; border-radius: 16px; }
.cards h3 { margin-bottom: 8px; }
.cards p { color: var(--muted); }

footer { text-align: center; padding: 40px 24px; color: var(--muted); font-size: 0.9rem; }