:root {
  --bg: #f7faf9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --primary: #16a34a;
  --primary-700: #15803d;
  --ring: 0 0 0 3px rgba(22, 163, 74, 0.25);
  --border: #e2e8f0;
  --shadow: 0 10px 25px rgba(2, 6, 23, 0.08);
  --radius: 16px;
}
[data-theme="dark"] {
  --bg: #0b1321;
  --card: #0f172a;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --primary: #22c55e;
  --primary-700: #16a34a;
  --border: #1f2a44;
  --shadow: 0 12px 30px rgba(2, 6, 23, 0.35);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Apple SD Gothic Neo", "Malgun Gothic", "맑은 고딕", "Noto Sans KR", sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, rgba(34,197,94,0.08), transparent 60%), var(--bg);
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font: inherit; }
.container { width: min(1100px, 92%); margin: 0 auto; }

header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(1.2) blur(8px);
  background: color-mix(in srgb, var(--bg) 85%, transparent); border-bottom: 1px solid var(--border); }
.nav { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 10px; }
.logo { width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--primary), #34d399); color: white; box-shadow: var(--shadow); }
.brand h1 { font-size: 1.15rem; margin: 0; letter-spacing: -0.2px; }
.nav-links { display: flex; gap: 14px; justify-content: center; }
.nav-links a { padding: 8px 12px; border-radius: 999px; border: 1px solid transparent; color: var(--muted); }
.nav-links a:hover { border-color: var(--border); color: var(--text); background: color-mix(in srgb, var(--card) 70%, transparent); }
.actions { display: flex; align-items: center; gap: 10px; }
.ghost, .solid { padding: 8px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--card); }
.solid { background: linear-gradient(135deg, var(--primary), var(--primary-700)); color: #fff; border: none; }
.solid:hover { filter: brightness(1.05); box-shadow: var(--ring); }
.ghost:hover { box-shadow: var(--ring); }
.theme-toggle { border-radius: 50%; width: 40px; height: 40px; display: grid; place-items: center; border: 1px solid var(--border); background: var(--card); }

.hero { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 22px; padding: 28px 0 18px; }
.hero-card, .hero-illustration { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-card { padding: 22px; }
.kicker { color: var(--primary); font-weight: 700; font-size: .9rem; letter-spacing: .4px; }
.hero h2 { margin: 6px 0 10px; font-size: clamp(1.2rem, 2.2vw, 1.8rem); letter-spacing: -0.3px; }
.hero p { color: var(--muted); margin: 0 0 14px; }
.cta-row { display: flex; gap: 10px; flex-wrap: wrap; }
.hero-illustration { padding: 0; overflow: hidden; }
.banner { aspect-ratio: 16/9;
  background: conic-gradient(from 180deg at 70% 20%, rgba(34,197,94,.2), transparent),
              radial-gradient(400px 200px at 20% 90%, rgba(34,197,94,.3), transparent),
              linear-gradient(135deg, #0ea5e9 0%, #22c55e 100%);
  display: grid; place-items: center; color: white; font-weight: 800; letter-spacing: .4px; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin: 18px 0 28px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-hd { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--border); }
.card-hd h3 { margin: 0; font-size: 1rem; }
.card-bd { padding: 16px 18px; }
.mission-list { display: grid; gap: 12px; }
.mission { display: grid; grid-template-columns: 28px 1fr auto; gap: 10px; align-items: center;
  padding: 12px; border: 1px solid var(--border); border-radius: 14px; background: color-mix(in srgb, var(--card) 90%, transparent); }
.mission[data-done="true"] { opacity: .6; }
.mission .badge { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--primary) 28%, var(--card)); color: var(--primary-700); font-size: 14px; font-weight: 800; }
.mission .title { font-weight: 600; }
.mission .meta { color: var(--muted); font-size: .85rem; }
.mission .btn { padding: 8px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--card); }
.mission .btn.done { background: linear-gradient(135deg, var(--primary), var(--primary-700)); color: #fff; border: none; }
.progress { height: 10px; background: #e2e8f0; border-radius: 999px; overflow: hidden; }
.progress > i { display: block; height: 100%; width: 0%; background: linear-gradient(90deg, var(--primary), #34d399); transition: width .3s ease; }

/* Region & Rules */
.rules-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; }
.input-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
label { font-size: .9rem; color: var(--muted); }
select, input[type="text"] { padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); background: var(--card); color: var(--text); }
.rule { border: 1px dashed var(--border); padding: 12px; border-radius: 14px; }
.rule strong { color: var(--primary-700); }

/* AI / AR */
.ai-ar-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.upload { display: grid; gap: 10px; }
.preview { border: 1px dashed var(--border); border-radius: 14px; padding: 10px; min-height: 160px; display: grid; place-items: center; background: color-mix(in srgb, var(--card) 90%, transparent); }
.result { border: 1px solid var(--border); border-radius: 14px; padding: 12px; background: color-mix(in srgb, var(--card) 90%, transparent); }
.tag { display:inline-block; border:1px solid var(--border); padding:2px 8px; border-radius:999px; font-size:.8rem; color:var(--muted); margin-right:6px; }
.video-wrap { position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--border); }
.video-wrap video, .video-wrap canvas { width: 100%; display: block; }
.overlay-hint { position: absolute; top: 10px; left: 10px; background: rgba(15,23,42,.7); color:#fff; padding: 6px 10px; border-radius: 10px; font-size:.85rem; }
.overlay-ctrl { display:flex; gap:8px; flex-wrap:wrap; margin-top:8px; }
.pill { padding:6px 10px; border:1px solid var(--border); border-radius:999px; background:var(--card); }
.pill.active { background: linear-gradient(135deg, var(--primary), var(--primary-700)); color:#fff; border:none; }

footer { border-top: 1px solid var(--border); color: var(--muted); padding: 28px 0; margin-top: 24px; }

@media (max-width: 960px) {
  .hero, .grid-2, .rules-grid, .ai-ar-grid { grid-template-columns: 1fr; }
  .nav { grid-template-columns: auto auto 1fr; gap: 10px; }
  .nav-links { display: none; }
}