@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@700&family=Inter:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');

:root {
  --bg:       #111111;
  --surface:  #1A1A1A;
  --surface2: #2E2E2E;
  --border:   #2E2E2E;
  --text:     #F5F5F5;
  --muted:    #6B7280;
  --muted2:   #4B5563;
  --accent:   #F5F5F5;
  --accent2:  #D1D5DB;
  --success:  #10B981;
  --error:    #EF4444;
  --warning:  #F5F5F5;
  --radius:   8px;
}

*,*::before,*::after { margin:0; padding:0; box-sizing:border-box }
html { scroll-behavior:smooth }
body {
  font-family: 'Inter', 'Noto Sans SC', 'Noto Sans KR', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color:inherit; text-decoration:none }

.navbar {
  display:flex; align-items:center; justify-content:space-between;
  padding:.875rem 2rem;
  background: rgba(17,17,17,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position:sticky; top:0; z-index:100;
}
.logo { font-family:'Orbitron',sans-serif; font-size:1.1rem; font-weight:700; letter-spacing:.1em; color:var(--text); }
.lang-switcher { display:flex; gap:.25rem }
.lang-btn { padding:.3rem .7rem; border:1px solid var(--border); background:transparent; color:var(--muted); border-radius:3px; cursor:pointer; font-size:.75rem; font-weight:500; transition:all .15s; font-family:inherit; }
.lang-btn:hover,.lang-btn.active { background:var(--text); border-color:var(--text); color:var(--bg); }

main { flex:1; max-width:1100px; margin:0 auto; padding:2rem; width:100% }

.hero { text-align:center; padding:4.5rem 1rem 3rem }
.hero h1 { font-family:'Orbitron',sans-serif; font-size:clamp(1.4rem,3.5vw,2.2rem); font-weight:700; letter-spacing:.05em; color:var(--text); margin-bottom:.75rem; line-height:1.3; }
.hero p { font-size:.95rem; color:var(--muted) }
.hero p strong { color:var(--text) }
.hero p + p { font-size:.85rem; color:var(--muted2); margin-top:.4rem }

.products { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:0; margin-top:1.5rem; border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }
.product-card { background:var(--surface); border:none; border-right:1px solid var(--border); border-bottom:1px solid var(--border); padding:1.75rem; display:flex; flex-direction:column; gap:.75rem; transition:background .2s; overflow:visible; }
.product-card:hover { background:var(--surface2); }
.product-card h2 { font-size:.95rem; font-weight:600; color:var(--text); letter-spacing:-.01em; }
.product-card p { color:var(--muted); font-size:.83rem; flex:1; line-height:1.6 }

.price { font-size:1.9rem; font-weight:800; color:var(--text); letter-spacing:-.02em; }
.price-block { display:flex; flex-direction:column; gap:.3rem }
.price-row { display:flex; align-items:center; gap:.75rem }
.price-original { font-size:.9rem; color:var(--muted2); text-decoration:line-through; font-weight:400; }

.sale-label { display:inline-block; background:transparent; border:1px solid var(--muted2); color:var(--muted); font-size:.68rem; font-weight:600; padding:.15rem .55rem; border-radius:3px; width:fit-content; letter-spacing:.04em; }
.price-badge { display:inline-block; background:transparent; border:1px solid var(--muted2); color:var(--muted); font-size:.68rem; font-weight:600; padding:.15rem .55rem; border-radius:3px; letter-spacing:.04em; }
.paywall-price { margin:.5rem 0 }

.card-actions { display:flex; flex-direction:column; gap:.5rem; margin-top:.25rem }
.btn { display:inline-block; padding:.7rem 1.4rem; border-radius:3px; font-size:.83rem; font-weight:600; cursor:pointer; border:none; text-align:center; font-family:inherit; transition:all .15s; text-decoration:none; letter-spacing:.02em; }
.btn-primary { background:var(--text); color:var(--bg); border:1px solid var(--text); }
.btn-primary:hover { background:var(--accent2); border-color:var(--accent2); transform:translateY(-1px); }
.btn-secondary { background:transparent; border:1px solid var(--border); color:var(--muted); }
.btn-secondary:hover { border-color:var(--muted); color:var(--text); }
.btn-danger { background:rgba(239,68,68,.08); border:1px solid rgba(239,68,68,.2); color:var(--error); }
.btn-danger:hover { background:rgba(239,68,68,.15) }
.btn-lg { font-size:.92rem; padding:.875rem 2.5rem }
.btn:disabled { opacity:.4; cursor:not-allowed; transform:none !important }

.test-container { max-width:700px; margin:0 auto }
.test-header h1 { font-family:'Orbitron',sans-serif; font-size:1.1rem; font-weight:700; letter-spacing:.08em; }
.progress-bar { background:var(--surface2); border-radius:0; height:1px; margin:.75rem 0; overflow:hidden; }
.progress-fill { background:var(--text); height:100%; transition:width .3s; }
.progress-labels { display:flex; justify-content:space-between; font-size:.72rem; color:var(--muted); letter-spacing:.06em; text-transform:uppercase; }
.question-card { background:transparent; border:none; border-top:1px solid var(--border); padding:2rem 0; margin-bottom:1.25rem; }
.q-num { color:var(--muted); font-size:.7rem; font-weight:600; text-transform:uppercase; letter-spacing:.1em; margin-bottom:.875rem; }
.q-text { font-size:1.1rem; font-weight:600; line-height:1.6; margin-bottom:1.5rem; letter-spacing:-.01em; }
.question-image { text-align:center; margin:.75rem 0; min-height:10px }
.question-image svg { width:100%; max-width:180px; height:auto; display:block; margin:0 auto }
.options { display:flex; flex-direction:column; gap:.65rem }
.option-btn { display:flex; align-items:flex-start; gap:1rem; padding:1rem 1.25rem; background:transparent; border:1px solid var(--border); border-radius:4px; cursor:pointer; text-align:left; color:var(--text); font-size:.92rem; font-family:inherit; transition:all .15s; width:100%; line-height:1.5; }
.option-btn:hover:not(:disabled) { border-color:var(--muted); background:var(--surface); }
.opt-label { font-weight:700; color:var(--muted); min-width:1.2rem; flex-shrink:0; }
.option-btn.selected { border-color:var(--text); background:var(--surface) }
.option-btn.correct { border-color:var(--success); background:rgba(16,185,129,.08); color:var(--success); }
.option-btn.correct .opt-label { color:var(--success); }
.option-btn.wrong { border-color:var(--error); background:rgba(239,68,68,.08); color:var(--error); text-decoration:line-through; }
.option-btn.wrong .opt-label { color:var(--error); }
.option-btn.dimmed { opacity:.3; }
.explanation { margin-top:1rem; padding:1.25rem; background:var(--surface); border:none; border-left:2px solid var(--muted2); font-size:.87rem; color:var(--muted); line-height:1.7; display:none; }
.explanation.show { display:block }

.paywall { display:flex; flex-direction:column; align-items:center; text-align:center; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:3rem 2rem; margin-top:1.5rem; gap:.75rem; }
.paywall-icon { font-size:2.5rem }
.paywall h2 { font-family:'Orbitron',sans-serif; font-size:1.2rem; font-weight:700; letter-spacing:.06em; }
.paywall p { color:var(--muted); font-size:.9rem }
.paywall-note { font-size:.77rem; color:var(--muted2); margin-top:.25rem }

.score-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:3rem 2rem; text-align:center; margin-bottom:1.5rem; }
.score-number { font-family:'Orbitron',sans-serif; font-size:3.5rem; font-weight:700; color:var(--text); line-height:1; letter-spacing:-.02em; }
.score-label { color:var(--muted); font-size:.8rem; margin-top:.5rem; text-transform:uppercase; letter-spacing:.1em; }
.score-pct { font-size:1.3rem; font-weight:700; margin-top:.5rem }

.center-page { max-width:600px; margin:3rem auto }
.info-card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:2.5rem }
.big-icon { font-size:2.5rem; margin-bottom:1rem }
.link-box { background:var(--bg); border:1px solid var(--border); border-radius:3px; padding:1.25rem; margin:1rem 0 }
.link-label { font-size:.68rem; font-weight:600; color:var(--muted); letter-spacing:.1em; text-transform:uppercase; margin-bottom:.4rem }
.center-msg { text-align:center; color:var(--muted); padding:3rem }
.empty-state { color:var(--muted); text-align:center; padding:3rem }
.badge { display:inline-block; padding:.2rem .55rem; border-radius:3px; font-size:.68rem; font-weight:600; margin-top:.4rem; letter-spacing:.03em; }
.badge-blue { background:rgba(245,245,245,.06); color:var(--muted); border:1px solid var(--border); }
.badge-green { background:rgba(16,185,129,.08); color:var(--success); border:1px solid rgba(16,185,129,.2); }
.badge-red { background:rgba(239,68,68,.08); color:var(--error); border:1px solid rgba(239,68,68,.2); }

.admin-wrap { max-width:1000px; margin:0 auto }
.tabs { display:flex; gap:0; border-bottom:1px solid var(--border); margin-bottom:1.75rem }
.tab { padding:.7rem 1.4rem; background:none; border:none; border-bottom:1px solid transparent; cursor:pointer; font-size:.8rem; font-weight:500; color:var(--muted); font-family:inherit; margin-bottom:-1px; transition:all .15s; letter-spacing:.04em; text-transform:uppercase; }
.tab.active { color:var(--text); border-bottom-color:var(--text); }
.tab-pane { display:none }
.tab-pane.active { display:block }
.prod-row { display:flex; justify-content:space-between; align-items:center; background:var(--surface); border:1px solid var(--border); border-radius:3px; padding:1rem 1.25rem; margin-bottom:.5rem; gap:1rem; }
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:.875rem }
.form-group { display:flex; flex-direction:column; gap:.3rem }
.form-group label { font-size:.72rem; font-weight:500; color:var(--muted); letter-spacing:.04em; text-transform:uppercase; }
.form-input { padding:.65rem .9rem; background:var(--bg); border:1px solid var(--border); border-radius:3px; color:var(--text); font-size:.88rem; font-family:inherit; width:100%; }
.form-input:focus { outline:none; border-color:var(--muted); }
.drop-zone { border:1px dashed var(--border); border-radius:3px; padding:2.5rem; text-align:center; cursor:pointer; transition:border-color .2s; color:var(--muted); font-size:.85rem; }
.drop-zone:hover,.drop-zone.drag-over { border-color:var(--muted) }
.table { width:100%; border-collapse:collapse; font-size:.83rem }
.table th { padding:.65rem; color:var(--muted); border-bottom:1px solid var(--border); text-align:left; font-weight:500; font-size:.7rem; letter-spacing:.06em; text-transform:uppercase; }
.table td { padding:.65rem; border-bottom:1px solid rgba(255,255,255,.03); vertical-align:top; color:var(--muted); }
.alert { padding:.7rem .9rem; border-radius:3px; font-size:.83rem }
.alert-success { background:rgba(16,185,129,.06); color:var(--success); border:1px solid rgba(16,185,129,.12) }
.alert-error { background:rgba(239,68,68,.06); color:var(--error); border:1px solid rgba(239,68,68,.12) }

.footer { text-align:center; padding:2rem; color:var(--muted2); font-size:.75rem; border-top:1px solid var(--border); letter-spacing:.03em; }

@media(max-width:640px) {
  .navbar { padding:.75rem 1rem }
  main { padding:1rem }
  .hero h1 { font-size:1.2rem }
  .form-grid { grid-template-columns:1fr }
  .prod-row { flex-direction:column; align-items:flex-start }
  .btn-lg { padding:.85rem 1.5rem }
  .products { border-radius:0; border-left:none; border-right:none; }
}