/* =====================================================
   안전보건 AI 검색 시스템 - 메인 스타일시트
   ===================================================== */

/* CSS 변수 */
:root {
  --primary: #1a56db;
  --primary-dark: #1341b5;
  --primary-light: #e8f0fe;
  --secondary: #0f766e;
  --secondary-light: #e8fdf8;
  --accent: #dc2626;
  --accent-light: #fef2f2;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.25s ease;
  --font: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* 리셋 & 기본 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button { cursor: pointer; font-family: var(--font); }
input, textarea { font-family: var(--font); }
img { max-width: 100%; }

/* =====================================================
   레이아웃
   ===================================================== */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}
#main-content { flex: 1; }
.tab-panel { display: none; padding-bottom: 60px; }
.tab-panel.active { display: block; }

/* =====================================================
   헤더
   ===================================================== */
#main-header {
  background: var(--white);
  border-bottom: 2px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 20px;
}
.logo-text { display: flex; flex-direction: column; }
.logo-title { font-size: 17px; font-weight: 700; color: var(--gray-900); line-height: 1.3; }
.logo-sub { font-size: 11px; color: var(--gray-500); }
.header-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  color: var(--gray-600);
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-btn:hover { background: var(--primary-light); color: var(--primary); }
.nav-btn.active { background: var(--primary); color: var(--white); }
.mobile-menu-btn {
  display: none;
  border: none;
  background: transparent;
  font-size: 22px;
  color: var(--gray-700);
  padding: 4px 8px;
}
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 8px 16px 12px;
  gap: 4px;
  border-top: 1px solid var(--gray-200);
}
.mobile-nav.open { display: flex; }
.mobile-nav .nav-btn {
  justify-content: flex-start;
  font-size: 15px;
  padding: 10px 14px;
}

/* =====================================================
   히어로 배너
   ===================================================== */
.hero-banner {
  background: linear-gradient(135deg, #0f2a6e 0%, #1a56db 45%, #0f766e 100%);
  color: var(--white);
  padding: 52px 20px 48px;
}
.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--white);
  font-size: 12.5px;
  font-weight: 500;
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 16px;
  backdrop-filter: blur(4px);
}
.hero-title {
  font-size: clamp(26px, 5vw, 40px);
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.25;
  letter-spacing: -0.5px;
}
.hero-desc {
  font-size: clamp(14px, 2.5vw, 17px);
  color: rgba(255,255,255,0.85);
  margin-bottom: 22px;
  line-height: 1.7;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.hero-badges span {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 99px;
}

/* =====================================================
   검색 카드
   ===================================================== */
.search-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  margin-top: -28px;
  position: relative;
  z-index: 10;
}

/* 검색 모드 선택 */
.search-mode-selector {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.mode-option {
  flex: 1;
  min-width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-600);
  transition: var(--transition);
  text-align: center;
  background: var(--white);
}
.mode-option input[type="radio"] { display: none; }
.mode-option:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.mode-option.selected {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.mode-option i { font-size: 20px; margin-bottom: 2px; }
.mode-desc { font-size: 11px; font-weight: 400; color: var(--gray-400); }
.mode-option.selected .mode-desc { color: var(--primary); opacity: 0.8; }

/* 검색 입력 */
.search-input-wrap {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 16px;
}
.search-textarea {
  flex: 1;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 15px;
  color: var(--gray-800);
  resize: none;
  outline: none;
  transition: border-color 0.2s;
  line-height: 1.6;
}
.search-textarea:focus { border-color: var(--primary); }
.search-textarea::placeholder { color: var(--gray-400); }
.search-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  height: 54px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
  white-space: nowrap;
}
.search-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(26, 86, 219, 0.4);
}
.search-btn:disabled { background: var(--gray-300); cursor: not-allowed; box-shadow: none; }

/* 예시 질문 */
.example-questions {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
}
.example-label {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--gray-500);
  white-space: nowrap;
  padding-top: 3px;
}
.example-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.example-list button {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(26,86,219,0.2);
  padding: 5px 12px;
  border-radius: 99px;
  font-size: 12.5px;
  font-weight: 500;
  transition: var(--transition);
}
.example-list button:hover {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* =====================================================
   검색 진행 상태
   ===================================================== */
.search-status {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 28px 24px 20px;
  box-shadow: var(--shadow-md);
  margin-top: 20px;
}
.status-steps {
  display: flex;
  gap: 0;
  margin-bottom: 20px;
  overflow-x: auto;
}
.step {
  flex: 1;
  min-width: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  position: relative;
  padding: 0 8px;
}
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -10%;
  top: 18px;
  width: 20%;
  height: 2px;
  background: var(--gray-200);
}
.step.done:not(:last-child)::after { background: var(--success); }
.step-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--gray-400);
  transition: var(--transition);
}
.step.active .step-icon {
  background: var(--primary-light);
  color: var(--primary);
  animation: pulse-icon 1.2s infinite;
}
.step.done .step-icon { background: var(--success-light); color: var(--success); }
.step-text { font-size: 11.5px; font-weight: 500; color: var(--gray-400); text-align: center; }
.step.active .step-text { color: var(--primary); font-weight: 600; }
.step.done .step-text { color: var(--success); }
.step-bar {
  width: 100%;
  height: 3px;
  background: var(--gray-200);
  border-radius: 99px;
  overflow: hidden;
}
.step.active .step-bar::after {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  background: var(--primary);
  animation: progress-bar 1.2s ease-in-out infinite;
}
.step.done .step-bar { background: var(--success); }
@keyframes pulse-icon {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}
@keyframes progress-bar {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}
.status-msg {
  text-align: center;
  font-size: 14px;
  color: var(--gray-500);
  font-style: italic;
}

/* =====================================================
   결과 영역
   ===================================================== */
.result-area {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.result-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 8px;
}
.result-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 99px;
  font-size: 12px;
  font-weight: 600;
}
.meta-badge.type-law { background: var(--primary-light); color: var(--primary); }
.meta-badge.type-msds { background: var(--secondary-light); color: var(--secondary); }
.meta-badge.type-both { background: #f3e8ff; color: #7c3aed; }
.meta-badge.type-general { background: var(--gray-100); color: var(--gray-600); }
.meta-badge.confidence-high { background: var(--success-light); color: var(--success); }
.meta-badge.confidence-med { background: var(--warning-light); color: var(--warning); }

/* AI 답변 카드 */
.answer-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.answer-content {
  padding: 24px 28px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray-800);
}
.answer-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin: 18px 0 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.answer-content h4:first-child { margin-top: 0; }
.answer-content p { margin-bottom: 10px; }
.answer-content ul, .answer-content ol {
  padding-left: 22px;
  margin-bottom: 12px;
}
.answer-content li { margin-bottom: 5px; }
.answer-section {
  padding: 14px 18px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  border-left: 4px solid;
}
.answer-section.summary { background: #f0f7ff; border-color: var(--primary); }
.answer-section.detail { background: var(--gray-50); border-color: var(--gray-400); }
.answer-section.source { background: var(--primary-light); border-color: var(--primary); }
.answer-section.caution { background: var(--warning-light); border-color: var(--warning); }
.answer-section .section-label {
  font-weight: 700;
  font-size: 14px;
  margin-bottom: 6px;
  display: block;
}
.answer-section.summary .section-label { color: var(--primary); }
.answer-section.detail .section-label { color: var(--gray-600); }
.answer-section.source .section-label { color: var(--primary-dark); }
.answer-section.caution .section-label { color: var(--warning); }
.no-data-answer {
  padding: 36px;
  text-align: center;
  color: var(--gray-400);
}
.no-data-answer i { font-size: 40px; margin-bottom: 12px; display: block; }

/* 소스 섹션 */
.source-section {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.source-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-700);
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--gray-50);
}
.source-tabs {
  display: flex;
  border-bottom: 1px solid var(--gray-200);
}
.src-tab {
  flex: 1;
  padding: 10px;
  border: none;
  background: transparent;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--gray-500);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.src-tab:hover { background: var(--gray-50); color: var(--gray-700); }
.src-tab.active { color: var(--primary); border-bottom: 2px solid var(--primary); background: var(--white); }
.src-panel { display: none; padding: 16px 20px; }
.src-panel.active { display: block; }
.no-data { text-align: center; color: var(--gray-400); font-size: 13.5px; padding: 20px 0; }

/* 법령 소스 카드 */
.law-source-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 12px;
}
.law-source-item:last-child { margin-bottom: 0; }
.law-src-header {
  background: var(--primary-light);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.law-src-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-dark);
}
.law-src-type {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--primary);
  color: var(--white);
  border-radius: 99px;
}
.law-src-body { padding: 12px 14px; font-size: 13px; color: var(--gray-600); line-height: 1.6; }
.law-src-body a { color: var(--primary); font-size: 12px; }

/* MSDS 소스 카드 */
.msds-source-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 12px;
}
.msds-source-item:last-child { margin-bottom: 0; }
.msds-src-header {
  background: var(--secondary-light);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.msds-src-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--secondary);
}
.msds-src-cas {
  font-size: 11px;
  color: var(--gray-500);
}
.msds-src-body { padding: 12px 14px; }
.msds-prop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}
.msds-prop {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}
.msds-prop-label { font-size: 11px; color: var(--gray-400); font-weight: 500; margin-bottom: 2px; }
.msds-prop-value { font-size: 13px; color: var(--gray-800); font-weight: 600; word-break: break-all; }

/* =====================================================
   법적 면책 고지
   ===================================================== */
.legal-notice {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--warning-light);
  border: 1px solid #fde68a;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.6;
}
.legal-notice i { color: var(--warning); font-size: 18px; flex-shrink: 0; margin-top: 2px; }
.legal-notice strong { color: var(--gray-800); }
.data-source-info { font-size: 12px; color: var(--gray-500); margin-top: 4px; display: block; }

/* 에러 카드 */
.error-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background: var(--accent-light);
  border: 1px solid #fca5a5;
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin-top: 16px;
  color: var(--accent);
}
.error-card i { font-size: 20px; flex-shrink: 0; }
.error-card > div { flex: 1; }
.error-card strong { display: block; margin-bottom: 4px; }
.error-card p { font-size: 13.5px; color: var(--gray-700); margin: 0; }
.error-card > button { background: none; border: none; color: var(--accent); font-size: 18px; padding: 0; flex-shrink: 0; }

/* =====================================================
   법령 & MSDS 직접 검색 탭
   ===================================================== */
.page-header {
  padding: 36px 0 24px;
}
.page-header h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-800);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.page-header p { font-size: 14.5px; color: var(--gray-500); }

.input-group { margin-bottom: 14px; }
.input-label { display: block; font-size: 13.5px; font-weight: 600; color: var(--gray-600); margin-bottom: 8px; }
.input-row { display: flex; gap: 10px; }
.text-input {
  flex: 1;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 15px;
  color: var(--gray-800);
  outline: none;
  transition: border-color 0.2s;
}
.text-input:focus { border-color: var(--primary); }
.btn-primary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  font-weight: 600;
  transition: var(--transition);
  background: transparent;
}
.btn-outline:hover { background: var(--primary); color: var(--white); text-decoration: none; }

.quick-keywords {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.quick-keywords > span { font-size: 12.5px; color: var(--gray-500); font-weight: 600; }
.quick-keywords button {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  color: var(--gray-600);
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 12.5px;
  transition: var(--transition);
}
.quick-keywords button:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

/* 로딩 */
.loading-wrap {
  text-align: center;
  padding: 40px;
  color: var(--gray-500);
}
.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 결과 그리드 */
.results-grid { display: grid; gap: 14px; }
.result-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.result-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.result-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 16px 18px 12px;
  gap: 12px;
}
.result-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-800);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.result-card-title i { color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.result-card-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 99px;
  font-size: 11.5px;
  font-weight: 600;
  white-space: nowrap;
}
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }
.badge-gray { background: var(--gray-100); color: var(--gray-500); }
.badge-red { background: var(--accent-light); color: var(--accent); }
.result-card-body {
  padding: 0 18px 14px;
  font-size: 13.5px;
  color: var(--gray-600);
  line-height: 1.65;
}
.result-card-footer {
  padding: 10px 18px 14px;
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--gray-100);
  flex-wrap: wrap;
}
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn-sm-primary { background: var(--primary-light); color: var(--primary); }
.btn-sm-primary:hover { background: var(--primary); color: var(--white); }
.btn-sm-outline {
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
}
.btn-sm-outline:hover { border-color: var(--gray-400); color: var(--gray-700); }

/* MSDS 결과 카드 특화 */
.msds-card { border-left: 4px solid var(--secondary); }
.msds-props {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 0 18px 14px;
}
.msds-tag {
  background: var(--secondary-light);
  color: var(--secondary);
  font-size: 11.5px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 4px;
}

/* =====================================================
   모달
   ===================================================== */
.detail-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  backdrop-filter: blur(4px);
}
.modal-content {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 640px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-wide { max-width: 800px; }
.modal-header {
  padding: 20px 22px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
}
.modal-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-800);
  flex: 1;
}
.modal-close {
  width: 34px;
  height: 34px;
  border: none;
  background: var(--gray-100);
  color: var(--gray-600);
  border-radius: 50%;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition);
}
.modal-close:hover { background: var(--gray-200); color: var(--gray-800); }
.modal-body {
  padding: 22px;
  overflow-y: auto;
  flex: 1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-700);
}
.modal-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: flex-end;
  flex-shrink: 0;
}

/* 법령 상세 내용 스타일 */
.law-detail-section { margin-bottom: 18px; }
.law-detail-section h4 {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}
.law-detail-section p {
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--gray-700);
  border-left: 3px solid var(--primary);
}

/* MSDS 상세 */
.msds-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.msds-detail-section {
  background: var(--gray-50);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}
.msds-detail-section.full-width { grid-column: 1 / -1; }
.msds-detail-section h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.msds-detail-section p, .msds-detail-section li {
  font-size: 13.5px;
  color: var(--gray-700);
}
.msds-detail-section ul { padding-left: 16px; }
.msds-detail-section li { margin-bottom: 3px; }

/* =====================================================
   소개 페이지
   ===================================================== */
.about-wrap { max-width: 860px; margin: 0 auto; padding: 40px 0 60px; }
.about-hero {
  text-align: center;
  margin-bottom: 40px;
}
.about-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--white);
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(26,86,219,0.3);
}
.about-hero h2 { font-size: 28px; font-weight: 800; color: var(--gray-900); margin-bottom: 8px; }
.about-hero p { font-size: 16px; color: var(--gray-500); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 32px;
}
.about-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.about-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 12px;
}
.about-card h3 { font-size: 15px; font-weight: 700; color: var(--gray-800); margin-bottom: 6px; }
.about-card p { font-size: 13.5px; color: var(--gray-500); line-height: 1.65; }

/* 데이터 소스 */
.data-sources {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 22px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}
.data-sources h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.source-list { display: flex; flex-direction: column; gap: 12px; }
.source-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-100);
}
.source-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.law-logo { background: var(--primary-light); color: var(--primary); }
.msds-logo { background: var(--secondary-light); color: var(--secondary); }
.ai-logo { background: #f3e8ff; color: #7c3aed; }
.source-info { display: flex; flex-direction: column; gap: 2px; }
.source-info strong { font-size: 14px; font-weight: 700; color: var(--gray-800); }
.source-info span { font-size: 12.5px; color: var(--gray-500); }
.source-info a { font-size: 12px; color: var(--primary); }
.about-notice { margin-top: 0; }

/* =====================================================
   푸터
   ===================================================== */
#main-footer {
  background: var(--gray-900);
  color: rgba(255,255,255,0.7);
  padding: 28px 20px;
  margin-top: auto;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--white);
  font-size: 15px;
  font-weight: 700;
}
.footer-brand i { color: var(--primary); }
.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--white); text-decoration: none; }
.footer-note {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 1.6;
  text-align: right;
}

/* =====================================================
   반응형 (모바일)
   ===================================================== */
@media (max-width: 768px) {
  .header-nav { display: none; }
  .mobile-menu-btn { display: block; }

  .hero-banner { padding: 36px 20px 40px; }
  .hero-badges { gap: 6px; }

  .search-card { padding: 18px; margin-top: -20px; }
  .search-mode-selector { gap: 6px; }
  .mode-option { min-width: 80px; padding: 9px 6px; font-size: 12px; }
  .mode-option .mode-desc { display: none; }

  .search-input-wrap { flex-direction: column; }
  .search-btn { width: 100%; justify-content: center; }

  .example-questions { flex-direction: column; align-items: flex-start; }

  .status-steps { gap: 0; }
  .step:not(:last-child)::after { display: none; }
  .step-text { font-size: 10px; }

  .about-grid { grid-template-columns: 1fr; }
  .msds-detail-grid { grid-template-columns: 1fr; }
  .msds-detail-section.full-width { grid-column: 1; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-note { text-align: center; }
  .footer-links { justify-content: center; }

  .modal-content { max-height: 90vh; }
}

@media (max-width: 480px) {
  .logo-sub { display: none; }
  .search-mode-selector { display: grid; grid-template-columns: 1fr 1fr; }
  .result-card-header { flex-direction: column; }
  .msds-prop-grid { grid-template-columns: 1fr 1fr; }
}

/* =====================================================
   유틸리티
   ===================================================== */
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.hidden { display: none !important; }
.fade-in { animation: fadeIn 0.4s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}