:root {
  --bg: #ffffff;
  --bg-alt: #f5f6fa;
  --text: #1b1d24;
  --muted: #5b6070;
  --accent: #c8322b;
  --accent-ink: #ffffff;
  --card: #ffffff;
  --border: #e3e5ec;
  --hero-from: #1a1c2e;
  --hero-to: #3a1d2a;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12131a;
    --bg-alt: #181a23;
    --text: #eceef4;
    --muted: #a3a8b8;
    --accent: #ef5a50;
    --card: #1e2029;
    --border: #2c2f3b;
    --hero-from: #0c0d16;
    --hero-to: #2a1019;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
section[id] { scroll-margin-top: 64px; }
body {
  margin: 0;
  font-family: "Noto Sans KR", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  word-break: keep-all;
}
a { color: inherit; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 1.15rem; text-decoration: none; }
.nav nav { display: flex; gap: 24px; }
.nav nav a { text-decoration: none; color: var(--muted); font-weight: 500; padding: 8px 0; }
.nav nav a:hover { color: var(--accent); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--hero-from), var(--hero-to));
  color: #fff;
  padding: 120px 0 110px;
}
.eyebrow { letter-spacing: .2em; font-size: .85rem; color: #ffb3ad; margin: 0 0 16px; font-weight: 700; }
.hero h1 { font-size: clamp(1.8rem, 4vw + 1rem, 3.4rem); line-height: 1.25; margin: 0 0 24px; font-weight: 900; }
.lead { font-size: clamp(1rem, 2vw, 1.15rem); color: #d6d8e2; margin: 0 0 36px; }
.btn {
  display: inline-block; padding: 14px 28px; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink);
  text-decoration: none; font-weight: 700;
  transition: transform .15s ease;
}

/* Sections */
.section { padding: 96px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: 1.9rem; margin: 0 0 28px; font-weight: 900; }
.section h2::after {
  content: ""; display: block; width: 40px; height: 4px;
  background: var(--accent); margin-top: 12px; border-radius: 2px;
}
.about p { font-size: 1.1rem; color: var(--muted); max-width: 760px; margin: 0; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px 28px;
  transition: transform .2s ease, box-shadow .2s ease;
}
/* 터치 기기에서 탭 후 hover 효과가 남지 않도록 */
@media (hover: hover) {
  .btn:hover { transform: translateY(-2px); }
  .card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,.08); }
}
.icon {
  width: 52px; height: 52px; border-radius: 12px;
  display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  margin-bottom: 20px;
}
.icon svg { width: 28px; height: 28px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linejoin: round; stroke-linecap: round; }
.card h3 { margin: 0 0 10px; font-size: 1.25rem; }
.card p { margin: 0; color: var(--muted); }

.preview { margin-top: 64px; text-align: center; }
.preview h3 { margin: 0 0 6px; font-size: 1.25rem; }
.preview p { margin: 0 0 24px; color: var(--muted); }
.preview-video {
  display: block; margin: 0 auto;
  /* 세로 영상: 화면 높이 안에 컨트롤까지 다 보이도록 폭을 제한 */
  width: min(100%, 360px, max(200px, calc((100vh - 120px) * 9 / 16)));
  width: min(100%, 360px, max(200px, calc((100svh - 120px) * 9 / 16)));
  height: auto;
  aspect-ratio: 9 / 16;
  background: #000;
  border-radius: 16px; border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(0,0,0,.12);
}
.preview .preview-note { margin: 16px 0 0; font-size: .9rem; }
.preview-note .warn { color: var(--accent); font-weight: 700; }

.contact > p { color: var(--muted); margin: 0 0 24px; }
.contact dl { margin: 0; display: grid; gap: 12px; }
.contact dl div { display: flex; gap: 24px; }
.contact dt { width: 150px; font-weight: 700; flex-shrink: 0; }
.contact dd { margin: 0; color: var(--muted); overflow-wrap: anywhere; }

.site-footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--muted); font-size: .9rem; }
.site-footer p { margin: 0; }
.site-footer .copyright { text-align: center; }

@media (max-width: 820px) {
  .cards { grid-template-columns: 1fr; }
  .br-wide { display: none; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .nav { height: 56px; }
  section[id] { scroll-margin-top: 56px; }
  .brand { gap: 8px; }
  .brand img { width: 28px; height: 28px; }
  .brand span { font-size: 1rem; }
  .nav nav { gap: 14px; font-size: .9rem; }
  .hero { padding: 72px 0 64px; }
  .lead { margin-bottom: 28px; }
  .section { padding: 64px 0; }
  .section h2 { font-size: 1.6rem; margin-bottom: 24px; }
  .card { padding: 26px 22px; }
  .preview { margin-top: 48px; }
  .preview h3 { font-size: 1.15rem; }
  .contact dl { gap: 16px; }
  .contact dl div { flex-direction: column; gap: 0; }
}
@media (max-width: 360px) {
  .brand span { font-size: .9rem; }
  .nav nav { gap: 12px; font-size: .85rem; }
}