/* =============================================
   시종설 실험 설문 사이트 - 글로벌 스타일시트
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&family=Inter:wght@400;500;600;700&display=swap');

/* CSS 커스텀 프로퍼티 */
:root {
  --primary: #4F6EF7;
  --primary-dark: #3A56D4;
  --primary-light: #EEF1FF;
  --accent: #7C3AED;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --bg: #F8F9FC;
  --surface: #FFFFFF;
  --surface-2: #F3F4F8;
  --border: #E2E5EF;
  --text-primary: #1A1D2E;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── 레이아웃 ─── */
.container { max-width: 960px; margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ─── 헤더 ─── */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header .logo {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
}
.site-header .step-badge {
  font-size: 0.78rem;
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 100px;
  font-weight: 600;
}

/* ─── 프로그레스 바 ─── */
.progress-bar-wrap {
  background: var(--border);
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
  margin-top: 10px;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transition: width 0.5s ease;
}

/* ─── 카드 ─── */
.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 28px 32px;
}
.card-lg { padding: 40px 48px; }

/* ─── 버튼 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all var(--transition);
  font-family: inherit;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #0DA271; transform: translateY(-1px); }
.btn-lg { padding: 16px 40px; font-size: 1.05rem; border-radius: var(--radius-md); }
.btn-full { width: 100%; }

/* ─── 폼 요소 ─── */
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,110,247,0.12);
}

/* ─── 라디오 선택 카드 ─── */
.radio-group { display: flex; flex-direction: column; gap: 10px; }
.radio-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface);
}
.radio-card:hover { border-color: var(--primary); background: var(--primary-light); }
.radio-card input[type=radio] { accent-color: var(--primary); width: 18px; height: 18px; flex-shrink: 0; }
.radio-card.selected { border-color: var(--primary); background: var(--primary-light); }
.radio-card .rc-label { font-size: 0.92rem; font-weight: 500; color: var(--text-primary); }

/* ─── 리커트 척도 ─── */
.likert-question {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
  transition: box-shadow var(--transition);
}
.likert-question:hover { box-shadow: var(--shadow-md); }
.likert-question.answered { border-color: var(--primary); border-left: 4px solid var(--primary); }
.likert-q-text { font-size: 0.95rem; font-weight: 500; color: var(--text-primary); margin-bottom: 16px; line-height: 1.5; }
.likert-q-num { display: inline-block; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; font-size: 0.78rem; font-weight: 700; text-align: center; line-height: 28px; margin-right: 8px; vertical-align: middle; }
.likert-scale { display: flex; align-items: center; gap: 0; }
.likert-labels { display: flex; justify-content: space-between; font-size: 0.72rem; color: var(--text-muted); margin-top: 6px; }
.likert-option { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.likert-option input[type=radio] { width: 20px; height: 20px; accent-color: var(--primary); cursor: pointer; }
.likert-option span { font-size: 0.78rem; color: var(--text-secondary); font-weight: 600; }

/* ─── AI 요약 박스 ─── */
.ai-summary-box {
  background: linear-gradient(135deg, #EEF2FF 0%, #F5F3FF 100%);
  border: 1.5px solid #C7D2FE;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.ai-summary-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
}
.ai-summary-title { font-size: 1rem; font-weight: 700; color: var(--text-primary); }
.ai-definition {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  background: rgba(255,255,255,0.7);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}
.ai-effects { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ai-effect-card {
  background: var(--surface);
  padding: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid #C7D2FE;
}
.ai-effect-card .effect-icon { font-size: 1.4rem; margin-bottom: 6px; }
.ai-effect-card .effect-title { font-size: 0.82rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 4px; }
.ai-effect-card .effect-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }

/* AI 추천 (과제2) */
.ai-reco-list { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }
.ai-reco-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid #C7D2FE;
}
.ai-reco-rank {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary); color: #fff;
  font-size: 0.82rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.ai-reco-rank.rank-1 { background: #F59E0B; }
.ai-reco-rank.rank-2 { background: var(--text-secondary); }
.ai-reco-rank.rank-3 { background: #CD7F32; }
.ai-reco-info .reco-name { font-size: 0.9rem; font-weight: 700; color: var(--text-primary); }
.ai-reco-info .reco-price { font-size: 0.8rem; color: var(--primary); font-weight: 600; }
.ai-reco-info .reco-reason { font-size: 0.78rem; color: var(--text-secondary); margin-top: 2px; }
.ai-tip {
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.7);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-top: 10px;
}

/* ─── 검색 결과 카드 ─── */
.search-result-item {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--primary-light); margin: 0 -16px; padding: 18px 16px; border-radius: var(--radius-sm); }
.search-result-domain { font-size: 0.78rem; color: var(--success); margin-bottom: 4px; }
.search-result-title { font-size: 1rem; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.search-result-title:hover { text-decoration: underline; }
.search-result-snippet { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.6; }

/* 이어폰 제품 카드 */
.product-card {
  display: flex;
  gap: 16px;
  padding: 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--surface);
  position: relative;
}
.product-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-2px); }
.product-card.selected { border-color: var(--success); background: #F0FDF4; }
.product-card.selected::after {
  content: '✓ 선택됨';
  position: absolute;
  top: 12px; right: 12px;
  background: var(--success);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
}
.product-icon { font-size: 2.5rem; flex-shrink: 0; display: flex; align-items: center; justify-content: center; width: 60px; height: 60px; background: var(--surface-2); border-radius: var(--radius-sm); }
.product-info { flex: 1; }
.product-name { font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.product-price { font-size: 1.05rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.product-rating { font-size: 0.78rem; color: var(--warning); margin-bottom: 6px; }
.product-specs { display: flex; flex-wrap: wrap; gap: 6px; }
.product-spec-tag { font-size: 0.72rem; background: var(--surface-2); color: var(--text-secondary); padding: 3px 10px; border-radius: 100px; font-weight: 500; }

/* ─── 메모장 ─── */
.memo-area {
  height: 100%;
  min-height: 300px;
  resize: none;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 0.9rem;
  font-family: inherit;
  line-height: 1.8;
  color: var(--text-primary);
  transition: border-color var(--transition);
  background: var(--surface);
}
.memo-area:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79,110,247,0.10); }
.memo-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ─── 과제 레이아웃 (검색결과 + 메모장) ─── */
.task-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 20px;
  align-items: start;
}
.task-pane { display: flex; flex-direction: column; }
.memo-pane { position: sticky; top: 80px; }

/* ─── 과제 지시문 배너 ─── */
.task-banner {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: #fff;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.task-banner-icon { font-size: 1.8rem; flex-shrink: 0; }
.task-banner-title { font-size: 0.78rem; font-weight: 700; opacity: 0.85; text-transform: uppercase; letter-spacing: 0.06em; }
.task-banner-desc { font-size: 0.97rem; font-weight: 600; margin-top: 2px; }

/* ─── 검색창 모의 ─── */
.mock-search-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 100px;
  padding: 10px 20px;
  margin-bottom: 16px;
  transition: border-color var(--transition);
}
.mock-search-bar:focus-within { border-color: var(--primary); }
.mock-search-icon { color: var(--text-muted); font-size: 1rem; }
.mock-search-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text-primary);
  background: transparent;
}
.mock-search-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 100px;
  padding: 6px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.mock-search-btn:hover { background: var(--primary-dark); }

/* ─── 섹션 제목 ─── */
.section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.section-subtitle {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ─── 완료 화면 ─── */
.complete-icon {
  font-size: 4rem;
  text-align: center;
  margin-bottom: 20px;
  animation: bounceIn 0.6s ease;
}
@keyframes bounceIn {
  0% { transform: scale(0.3); opacity: 0; }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

/* ─── 관리자 테이블 ─── */
.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.83rem; min-width: 1000px; }
.admin-table th {
  background: var(--primary);
  color: #fff;
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  position: sticky;
  top: 0;
  white-space: nowrap;
}
.admin-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); color: var(--text-primary); white-space: nowrap; }
.admin-table tr:nth-child(even) td { background: var(--surface-2); }
.admin-table tr:hover td { background: var(--primary-light); }
.badge-group-a { background: #DBEAFE; color: #1D4ED8; padding: 2px 8px; border-radius: 6px; font-weight: 600; font-size: 0.76rem; }
.badge-group-b { background: #FCE7F3; color: #9D174D; padding: 2px 8px; border-radius: 6px; font-weight: 600; font-size: 0.76rem; }

/* ─── 기타 유틸 ─── */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

/* ─── 반응형 ─── */
@media (max-width: 768px) {
  .task-layout { grid-template-columns: 1fr; }
  .memo-pane { position: static; }
  .ai-effects { grid-template-columns: 1fr; }
  .card-lg { padding: 24px 20px; }
  .container { padding: 0 16px; }
}