:root {
  --purple:  #7c3aed;
  --purple2: #6d28d9;
  --violet:  #8b5cf6;
  --bg:      #f5f3ff;
  --card:    #ffffff;
  --ink:     #0f172a;
  --muted:   #64748b;
  --line:    #e2d9f3;
  --red:     #ef4444;
  --green:   #22c55e;
  --shadow:  0 8px 28px rgba(124,58,237,.12);
  --radius:  16px;
  --radius2: 12px;
}

* { box-sizing: border-box }

body {
  margin-top: 70px;
  font-family: 'Pretendard', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 450px at 15% -10%, rgba(124,58,237,.12), transparent 60%),
    radial-gradient(700px 350px at 90% 5%, rgba(139,92,246,.08), transparent 55%),
    var(--bg);
}

.wrap { max-width: 100%; padding: 0 0 60px }

/* ── 헤더 ── */
.top { padding: 16px 0 20px }
.brand { display: flex; align-items: center; gap: 16px }
.logo {
  width: 48px; height: 48px; border-radius: 13px;
  background: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(124,58,237,.35);
}
.brand h1 { margin: 0; font-size: 22px; font-weight: 800; letter-spacing: -.03em }
.brand .sub { margin: 4px 0 0; font-size: 13px; color: var(--muted) }

/* ── 탭 ── */
.tab-nav { display: flex; gap: 8px; margin: 0 0 20px; flex-wrap: wrap }
.tab-btn {
  padding: 9px 20px; border-radius: 999px;
  border: 1.5px solid var(--line); background: var(--card);
  font-size: 13px; font-weight: 700; cursor: pointer; color: var(--muted);
  transition: all .18s;
}
.tab-btn:hover { border-color: var(--purple); color: var(--purple) }
.tab-btn.active { background: var(--purple); border-color: var(--purple); color: #fff }

/* ── 검사판 ── */
.plate-header {
  display: flex; justify-content: space-between; align-items: center;
  margin: 0 0 14px;
}
.plate-num { font-size: 14px; font-weight: 700; color: var(--muted) }
.plate-type-badge {
  font-size: 12px; font-weight: 700;
  padding: 3px 11px; border-radius: 999px;
}
.plate-type-badge.type-demo { background: #ede9fe; color: var(--purple) }
.plate-type-badge.type-rg   { background: #fef2f2; color: #b91c1c }

.plate-area { display: flex; justify-content: center; margin: 0 0 20px }
#plateCanvas {
  border-radius: 50%;
  box-shadow: var(--shadow);
  max-width: 100%;
}

.plate-question {
  text-align: center; font-size: 15px; font-weight: 700;
  margin: 0 0 16px; color: var(--ink);
}

/* ── 선택지 ── */
.option-grid {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center; margin: 0 0 14px;
}
.opt-btn {
  min-width: 80px; padding: 12px 20px; border-radius: 12px;
  border: 2px solid var(--line); background: var(--card);
  font-size: 18px; font-weight: 800; cursor: pointer; color: var(--ink);
  transition: all .15s; box-shadow: 0 2px 8px rgba(0,0,0,.06);
}
.opt-btn:hover {
  border-color: var(--purple); color: var(--purple);
  background: #f5f3ff; transform: translateY(-2px);
}

/* ── 힌트 ── */
.plate-hint {
  text-align: center; font-size: 12px; color: var(--muted);
  background: #f8f7ff; border-radius: 10px;
  padding: 10px 14px; min-height: 36px;
}

/* ── 결과 ── */
.result-card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 24px;
  box-shadow: var(--shadow); text-align: center;
}
.result-icon { font-size: 52px; margin: 0 0 12px }
.result-title { font-size: 22px; font-weight: 800; margin: 0 0 12px }
.result-title.good     { color: #16a34a }
.result-title.mild     { color: #d97706 }
.result-title.moderate { color: #ea580c }
.result-title.severe   { color: #dc2626 }
.result-title.warn     { color: var(--purple) }

.result-desc {
  font-size: 14px; color: var(--muted); line-height: 1.7;
  margin: 0 0 20px;
}

.ans-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px; margin: 0 0 20px; text-align: left;
}
.ans-table td { padding: 7px 10px; border-bottom: 1px solid var(--line) }
.ans-table tr.wrong td { color: var(--red); background: #fef2f2 }

.retry-btn {
  padding: 12px 28px; border-radius: 999px;
  border: none; background: var(--purple); color: #fff;
  font-size: 14px; font-weight: 700; cursor: pointer;
  transition: opacity .15s;
}
.retry-btn:hover { opacity: .85 }

/* ── 시뮬레이터 ── */
.sim-intro { font-size: 14px; color: var(--muted); margin: 0 0 16px }

.filter-btns { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px }
.filter-btn {
  padding: 8px 16px; border-radius: 10px;
  border: 1.5px solid var(--line); background: var(--card);
  font-size: 13px; font-weight: 700; cursor: pointer; color: var(--muted);
  transition: all .15s;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.filter-btn small { font-size: 11px; font-weight: 400 }
.filter-btn:hover  { border-color: var(--purple); color: var(--purple) }
.filter-btn.active { background: var(--purple); border-color: var(--purple); color: #fff }

.sim-label { font-size: 14px; font-weight: 700; margin: 0 0 12px; color: var(--ink) }

.sim-wrap {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius2); padding: 16px;
  box-shadow: var(--shadow); margin: 0 0 14px;
}
.sim-display {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
  gap: 4px;
  transition: filter .3s;
}
.swatch { aspect-ratio: 1; border-radius: 6px; min-height: 42px }

.sim-info {
  font-size: 13px; color: var(--muted); line-height: 1.7;
  background: #f8f7ff; border-radius: 10px; padding: 12px 14px;
}

/* ── 사용 안내 ── */
.guide-section {
  margin-top: 28px;
  background: rgba(246,248,255,.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.guide-section h2 { font-size: 15px; font-weight: 800; margin: 0 0 10px; color: var(--ink) }
.guide-section h2:not(:first-child) { margin-top: 18px }
.guide-steps, .guide-features, .guide-usecase {
  margin: 0; padding-left: 18px;
  color: var(--muted); font-size: 13px; line-height: 1.8;
}
.guide-steps li, .guide-features li, .guide-usecase li { margin-bottom: 4px }
.guide-steps strong, .guide-features strong { color: var(--ink) }
.guide-privacy {
  margin-top: 16px;
  background: #eff6ff; border: 1px solid rgba(37,99,235,.22);
  border-radius: 12px; padding: 12px 14px;
  font-size: 12px; color: #1e40af; line-height: 1.55;
}

/* ── 반응형 ── */
@media (max-width: 480px) {
  #plateCanvas { width: 240px !important; height: 240px !important }
  .opt-btn { min-width: 70px; font-size: 16px; padding: 10px 14px }
  .swatch { min-height: 34px }
}
@media (max-width: 360px) {
  #plateCanvas { width: 200px !important; height: 200px !important }
}