/* 디자인 토큰 — 색이나 둥글기를 바꾸려면 여기만 고치면 된다. */
:root {
  --ink: #14161a;
  --ink-soft: #5c6470;
  --line: #e4e7ec;
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --accent: #2f5bea;
  --accent-ink: #ffffff;
  --radius: 14px;
  --font: system-ui, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --wrap: 68rem;
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(100% - 2.5rem, var(--wrap)); margin-inline: auto; }

a { color: inherit; }

/* 헤더 */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: 4rem; }
.brand { font-weight: 700; letter-spacing: -.02em; text-decoration: none; font-size: 1.05rem; }
.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a:not(.btn) { text-decoration: none; color: var(--ink-soft); font-size: .95rem; }
.nav a:not(.btn):hover { color: var(--ink); }

.btn {
  display: inline-block; padding: .7rem 1.35rem; border-radius: calc(var(--radius) - 6px);
  background: var(--accent); color: var(--accent-ink); text-decoration: none;
  font-weight: 600; font-size: .95rem; border: 0; cursor: pointer;
  transition: transform .15s ease, filter .15s ease;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink-soft); filter: none; }

/* 히어로 */
.hero { padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5rem); }
.hero-inner { display: grid; gap: 3rem; grid-template-columns: 1.05fr .95fr; align-items: center; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 600; letter-spacing: .06em;
  text-transform: uppercase; color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding: .35rem .7rem; border-radius: 99px; margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.4rem); line-height: 1.15;
  letter-spacing: -.03em; margin: 0 0 1.1rem;
}
.hero p { font-size: 1.1rem; color: var(--ink-soft); margin: 0 0 2rem; max-width: 34rem; }
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; }

/* 히어로 그림 — 외부 이미지 없이 CSS 로만 그린다 */
.visual {
  aspect-ratio: 4 / 3; border-radius: var(--radius); border: 1px solid var(--line);
  background:
    radial-gradient(circle at 22% 28%, color-mix(in srgb, var(--accent) 24%, transparent), transparent 55%),
    radial-gradient(circle at 78% 72%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 52%),
    var(--bg-soft);
  display: grid; place-items: center; padding: 1.75rem; overflow: hidden;
}
.visual-card {
  width: 100%; background: var(--bg); border: 1px solid var(--line);
  border-radius: calc(var(--radius) - 4px); padding: 1.15rem 1.25rem;
  box-shadow: 0 18px 40px -22px rgba(16, 22, 40, .5);
  display: grid; gap: .7rem;
}
.visual-row { display: flex; align-items: center; gap: .7rem; }
.dot { width: .6rem; height: .6rem; border-radius: 50%; background: var(--accent); flex: none; }
.bar { height: .5rem; border-radius: 99px; background: var(--line); }

/* 지표 */
.stats { border-block: 1px solid var(--line); background: var(--bg-soft); }
.stats .wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; padding: 2.5rem 0; }
.stat strong { display: block; font-size: clamp(1.7rem, 3.4vw, 2.4rem); letter-spacing: -.02em; }
.stat span { color: var(--ink-soft); font-size: .95rem; }

/* 특징 */
.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section-head { max-width: 40rem; margin-bottom: 2.75rem; }
.section-head h2 { font-size: clamp(1.6rem, 3.6vw, 2.2rem); letter-spacing: -.025em; margin: 0 0 .75rem; }
.section-head p { color: var(--ink-soft); margin: 0; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
.card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.75rem 1.5rem;
  background: var(--bg); transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-icon {
  width: 2.5rem; height: 2.5rem; border-radius: 10px; margin-bottom: 1.1rem;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  display: grid; place-items: center; color: var(--accent); font-weight: 700;
}
.card h3 { margin: 0 0 .5rem; font-size: 1.1rem; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* 마무리 CTA */
.cta-band {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-soft); padding: clamp(2.25rem, 5vw, 3.5rem);
  display: flex; gap: 2rem; align-items: center; justify-content: space-between; flex-wrap: wrap;
}
.cta-band h2 { margin: 0 0 .4rem; font-size: clamp(1.4rem, 3vw, 1.9rem); letter-spacing: -.02em; }
.cta-band p { margin: 0; color: var(--ink-soft); }

/* 푸터 */
.site-footer { border-top: 1px solid var(--line); padding: 3rem 0 2.5rem; margin-top: 1rem; }
.footer-grid { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.footer-grid p { margin: .2rem 0; color: var(--ink-soft); font-size: .95rem; }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--ink-soft); text-decoration: none; font-size: .95rem; }
.footer-links a:hover { color: var(--ink); }
.copyright { margin-top: 2rem; color: var(--ink-soft); font-size: .875rem; }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: 1fr; text-align: center; }
  .nav a:not(.btn) { display: none; }
}