:root {
  --bg: #0A0B17;
  --bg-2: #11132A;
  --surface: #161936;
  --surface-2: #1E2246;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.16);
  --text: #F3F1FF;
  --text-2: #B7B4D6;
  --text-3: #7F7CA3;
  --accent: #B9A2FF;
  --accent-ink: #12102A;
  --gold: #FFD98A;
  --radius: 18px;
  --gutter: 20px;
  --max: 1200px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
img, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* 배경: 영상과 같은 밤하늘 흐름선 느낌 */
.sky {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 85% -10%, rgba(123, 92, 255, 0.28), transparent 70%),
    radial-gradient(50vw 40vh at -10% 30%, rgba(255, 138, 61, 0.10), transparent 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
}
.sky svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.5; }

/* 헤더 */
.top {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  background: rgba(10, 11, 23, 0.72);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; letter-spacing: 0.08em; font-size: 15px; }
.brand img { display: block; height: 20px; width: auto; }
.nav { display: flex; gap: 4px; }
.nav a { text-decoration: none; color: var(--text-2); padding: 8px 12px; border-radius: 999px; font-size: 14px; font-weight: 600; }
.nav a:hover { color: var(--text); background: var(--surface); }
.nav a[aria-current="page"] { color: var(--accent-ink); background: var(--accent); }

/* 히어로 */
.hero { padding-top: 64px; padding-bottom: 28px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: 0.12em; color: var(--accent); text-transform: uppercase; }
.eyebrow::before { content: ''; width: 18px; height: 2px; background: currentColor; border-radius: 2px; }
.hero h1 { margin: 14px 0 12px; font-size: clamp(32px, 6vw, 60px); line-height: 1.15; letter-spacing: -0.02em; font-weight: 800; }
.hero h1 em { font-style: normal; background: linear-gradient(90deg, #FFD98A, #FF9C6B 45%, #B9A2FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p { margin: 0; max-width: 560px; color: var(--text-2); font-size: clamp(15px, 2vw, 18px); }
.stats { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.stat { padding: 10px 16px; border: 1px solid var(--line-2); border-radius: 999px; font-size: 14px; color: var(--text-2); background: rgba(22, 25, 54, 0.6); }
.stat b { color: var(--text); font-weight: 700; }

/* 툴바 */
.toolbar { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; padding: 20px 0 18px; }
.search { position: relative; flex: 1 1 260px; max-width: 380px; }
.search input {
  width: 100%; height: 46px; padding: 0 16px 0 44px; border-radius: 999px;
  border: 1px solid var(--line-2); background: var(--surface); color: var(--text); font: inherit; font-size: 15px; outline: none;
}
.search input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(185, 162, 255, 0.2); }
.search svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-3); }
.count { color: var(--text-3); font-size: 14px; }

/* 제품 카드 그리드 */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 18px; padding-bottom: 40px; }
.card {
  position: relative; display: block; width: 100%; padding: 0; border: 0; cursor: pointer; text-align: left;
  border-radius: var(--radius); overflow: hidden; background: var(--surface);
  aspect-ratio: 9 / 16; isolation: isolate;
  box-shadow: 0 0 0 1px var(--line) inset;
  transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s;
}
.card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform .5s cubic-bezier(.2,.8,.2,1); }
.card::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(10,11,23,0) 40%, rgba(10,11,23,0.92) 88%); }
.card:hover, .card:focus-visible { transform: translateY(-4px); box-shadow: 0 0 0 2px var(--c, var(--accent)) inset, 0 18px 40px -16px var(--c, var(--accent)); outline: none; }
.card:hover img { transform: scale(1.04); }
.card .meta { position: absolute; left: 0; right: 0; bottom: 0; padding: 16px; }
.card .cat { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 0.04em; padding: 3px 9px; border-radius: 999px; background: var(--c, var(--accent)); color: #111; margin-bottom: 8px; }
.card h3 { margin: 0; font-size: 18px; line-height: 1.3; font-weight: 800; }
.card .tag { margin: 4px 0 0; font-size: 13px; color: var(--text-2); line-height: 1.45; }
.card .dur { position: absolute; top: 12px; right: 12px; font-size: 12px; font-weight: 700; padding: 4px 9px; border-radius: 999px; background: rgba(10,11,23,0.7); backdrop-filter: blur(6px); font-variant-numeric: tabular-nums; }
.card .play { position: absolute; top: 50%; left: 50%; width: 58px; height: 58px; margin: -29px 0 0 -29px; border-radius: 50%; background: rgba(255,255,255,0.16); backdrop-filter: blur(8px); display: grid; place-items: center; opacity: 0; transform: scale(.85); transition: .25s; }
.card:hover .play, .card:focus-visible .play { opacity: 1; transform: scale(1); }
.empty { grid-column: 1 / -1; text-align: center; color: var(--text-3); padding: 60px 0; }

/* 강의 배너 */
.band { margin: 20px 0 56px; border-radius: 24px; padding: 32px; background: linear-gradient(120deg, #1E2246, #2A1E4A 60%, #3A2340); border: 1px solid var(--line-2); display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between; }
.band h2 { margin: 0 0 6px; font-size: 24px; }
.band p { margin: 0; color: var(--text-2); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 20px; border-radius: 999px; border: 0; cursor: pointer; text-decoration: none; font-weight: 700; font-size: 15px; background: var(--accent); color: var(--accent-ink); white-space: nowrap; }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--text); box-shadow: 0 0 0 1px var(--line-2) inset; }
.btn.ghost:hover { background: var(--surface); }
.btn.sm { height: 38px; padding: 0 14px; font-size: 14px; }

/* 플레이어 모달 */
.viewer { position: fixed; inset: 0; z-index: 50; display: none; background: rgba(5, 6, 14, 0.92); backdrop-filter: blur(10px); }
.viewer.open { display: flex; }
.viewer-in { margin: auto; display: grid; grid-template-columns: auto minmax(0, 380px); gap: 36px; align-items: center; padding: 24px; max-height: 100vh; }
.viewer video { height: min(88vh, 860px); aspect-ratio: 9 / 16; width: auto; border-radius: 20px; background: #000; box-shadow: 0 30px 80px -20px var(--c, #7B5CFF); }
.viewer .info .cat { display: inline-block; font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px; background: var(--c); color: #111; }
.viewer .info h2 { margin: 12px 0 2px; font-size: 32px; line-height: 1.2; }
.viewer .info .en { color: var(--text-3); font-weight: 600; letter-spacing: 0.04em; }
.viewer .info .tagline { margin: 18px 0 8px; font-size: 18px; font-weight: 700; color: var(--c); }
.viewer .info .summary { margin: 0 0 24px; color: var(--text-2); }
.viewer .actions { display: flex; flex-wrap: wrap; gap: 10px; }
.viewer .steps { display: flex; gap: 10px; margin-top: 28px; }
.viewer .note { margin-top: 26px; font-size: 12px; color: var(--text-3); }
.x { position: fixed; top: 16px; right: 16px; width: 44px; height: 44px; border-radius: 50%; border: 0; cursor: pointer; background: rgba(255,255,255,0.1); display: grid; place-items: center; z-index: 2; }
.x:hover { background: rgba(255,255,255,0.2); }

/* 강의자료 */
.chips { display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 14px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chip { flex: none; height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-2); background: transparent; color: var(--text-2); cursor: pointer; font-size: 14px; font-weight: 600; }
.chip:hover { color: var(--text); }
.chip[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.chip small { opacity: .7; margin-left: 4px; font-weight: 500; }
.list { list-style: none; margin: 0 0 140px; padding: 0; border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; gap: 14px; align-items: center; padding: 12px 4px; border-bottom: 1px solid var(--line); }
.row:hover { background: rgba(255,255,255,0.02); }
.row.now { background: rgba(185, 162, 255, 0.08); }
.pbtn { width: 44px; height: 44px; border-radius: 50%; border: 0; cursor: pointer; background: var(--surface-2); display: grid; place-items: center; color: var(--text); }
.row.now .pbtn, .pbtn:hover { background: var(--accent); color: var(--accent-ink); }
.row .t { font-weight: 700; line-height: 1.4; overflow-wrap: anywhere; }
.row .s { font-size: 13px; color: var(--text-3); }
.row .s .prog { color: var(--gold); margin-left: 6px; }
.dl { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; color: var(--text-3); text-decoration: none; }
.dl:hover { color: var(--text); background: var(--surface); }

.bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; display: none;
  background: rgba(17, 19, 42, 0.94); backdrop-filter: blur(14px); border-top: 1px solid var(--line-2);
  padding: 12px 0 calc(12px + env(safe-area-inset-bottom));
}
.bar.on { display: block; }
.bar .wrap { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 14px; align-items: center; }
.bar .ctl { display: flex; align-items: center; gap: 6px; }
.ibtn { width: 40px; height: 40px; border-radius: 50%; border: 0; background: transparent; cursor: pointer; display: grid; place-items: center; color: var(--text); }
.ibtn:hover { background: var(--surface-2); }
.ibtn.main { width: 48px; height: 48px; background: var(--accent); color: var(--accent-ink); }
.bar .now-t { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar .tl { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.bar input[type=range] { flex: 1; accent-color: var(--accent); min-width: 0; }
.rate { height: 34px; padding: 0 10px; border-radius: 999px; border: 1px solid var(--line-2); background: transparent; color: var(--text); cursor: pointer; font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--text-3); font-size: 13px; }
footer p { margin: 0 0 6px; }

@media (max-width: 860px) {
  .viewer-in { grid-template-columns: 1fr; gap: 18px; padding: 64px 16px 24px; overflow-y: auto; max-height: 100dvh; align-items: start; }
  .viewer { overflow-y: auto; }
  .viewer video { height: auto; width: min(100%, calc(72dvh * 9 / 16)); margin: 0 auto; }
  .viewer .info h2 { font-size: 26px; }
}
@media (max-width: 560px) {
  :root { --gutter: 16px; }
  .hero { padding-top: 40px; padding-bottom: 16px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .card .meta { padding: 12px; }
  .card h3 { font-size: 15px; }
  .card .tag { font-size: 12px; }
  .band { padding: 24px; }
  .nav a { padding: 8px 10px; }
  .bar .wrap { grid-template-columns: minmax(0, 1fr) auto; }
  .bar .ctl.left { grid-column: 1 / -1; order: 3; justify-content: center; }
  .row { grid-template-columns: 40px minmax(0, 1fr) auto; gap: 10px; }
  .pbtn { width: 40px; height: 40px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* 구매 문의 */
.contact { margin-top: 14px; padding: 18px 18px 16px; border-radius: 18px; background: var(--surface); box-shadow: 0 0 0 1px var(--line-2) inset; }
.contact .c-lead { margin: 0; color: var(--text-2); font-size: 15px; }
.contact .c-lead b { color: var(--text); }
.contact .c-num { display: block; margin: 6px 0 14px; font-size: 26px; font-weight: 800; letter-spacing: .01em; color: var(--text); text-decoration: none; font-variant-numeric: tabular-nums; }
.contact .c-acts { display: flex; gap: 8px; flex-wrap: wrap; }