:root {
  /* Luxury Corporate Light Palette - High Contrast Refinement */
  --bg-color: #f8f8fa; 
  --card-bg: #ffffff;
  --primary: #005bb5; /* Slightly deeper sapphire for better contrast */
  --primary-hover: #003d7a;
  --primary-light: rgba(0, 91, 181, 0.08);
  --secondary: #c92a2a; /* Stronger red/orange for visibility */
  --text-main: #111111; /* Absolute high-contrast charcoal */
  --text-muted: #4b4b4e; /* Much darker gray for high legibility */
  --border-radius: 12px;
  --border-color: rgba(0, 0, 0, 0.15);
  --shadow-soft: 0 4px 15px rgba(0, 0, 0, 0.04);
  --shadow-premium: 0 12px 48px rgba(0, 0, 0, 0.08);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro KR", "Pretendard", "Inter", sans-serif;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 80px 20px;
}

header {
  text-align: center;
  margin-bottom: 80px;
  animation: fadeInDown 1s cubic-bezier(0.16, 1, 0.3, 1);
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.04em;
}

.subtitle {
  color: var(--text-muted);
  font-size: 1.25rem;
  font-weight: 400;
}

/* Formal Corporate Cards */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 40px;
  box-shadow: var(--shadow-soft);
  margin-bottom: 30px;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-premium);
}

.grid-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

/* Ensure consistent width for all main sections */
.content-width-sync {
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 992px) {
  .grid-layout { grid-template-columns: 1fr; }
}

/* Internal Size Selector in Result Section */
.result-size-selector {
  display: flex;
  gap: 5px;
  background: #f0f4ff;
  padding: 5px;
  border-radius: 12px;
  border: 1.5px solid var(--primary-light);
}

.size-btn {
  padding: 8px 15px;
  border: none;
  background: transparent;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.result-size-selector button.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 10px rgba(0, 91, 181, 0.2);
}

.result-tabs .res-tab {
  flex: 1;
  padding: 10px 5px;
  border: none;
  background: transparent;
  color: #666;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.result-tabs .res-tab.active {
  background: white;
  color: var(--primary);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* AI Certification Vault hover */
#certVault a:hover {
  transform: translateY(-4px);
  border-color: var(--primary) !important;
}

.size-btn:hover:not(.active) {
  background: rgba(10, 84, 247, 0.1);
}

/* Bottom Action Bar */
.bottom-action-bar {
  display: flex;
  gap: 15px;
  justify-content: center;
  padding: 30px 20px 60px;
  border-top: 1px solid #eee;
  margin-top: 50px;
}

.bottom-action-bar .btn {
  min-width: 200px;
}

/* Clean Form Styles */
.form-group {
  margin-bottom: 24px;
}

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-muted);
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid #d2d2d7;
  background: #fff;
  color: var(--text-main);
  font-size: 1.05rem;
  transition: all 0.2s ease;
}

input[readonly] {
  background: #fbfbfd !important;
  color: var(--text-muted) !important;
  border-color: #e5e5e7 !important;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
}

input[type="checkbox"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* Buttons - High Contrast */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  font-size: 1.1rem;
  gap: 8px;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: scale(1.01);
}

.btn-secondary {
  background: #f5f5f7;
  color: var(--primary);
  border: 1px solid #d2d2d7;
}

.btn-secondary:hover {
  background: #e8e8ed;
}

.btn-drive {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #c8e6c9;
}

.btn-drive:hover {
  background: #c8e6c9;
  transform: scale(1.01);
}

.btn-email {
  background: linear-gradient(135deg, #1a73e8, #0d47a1);
  color: white;
}

.btn-email:hover {
  background: linear-gradient(135deg, #1557b0, #0a3375);
  transform: scale(1.01);
}

/* AI Sketch Area - Precise & Light */
.sketch-container {
  width: 100%;
  min-height: 400px;
  background: #fbfbfd;
  border-radius: 12px;
  border: 1px solid #e5e5e7;
  padding: 30px;
}

/* Result Dashboard - Legible & Direct */
.result-box {
  background: #ffffff;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
  transition: all 0.3s ease;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result-box:last-child {
  border: 2px solid var(--primary);
  background: #fcfdfe; /* Very subtle blue tint for emphasis */
}

.result-val {
  font-size: 3.2rem;
  font-weight: 800;
  display: block;
  color: var(--text-main); /* Standard result is charcoal */
  letter-spacing: -0.05em;
  margin-top: 5px;
}

/* Explicit sapphire color for the final price result */
#resTotal {
    color: var(--primary);
}

.result-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: none; /* Removed all caps for more formal feel */
  letter-spacing: -0.02em;
}

/* Review Links */
.review-link {
  background: #ffffff;
  border: 1px solid #d2d2d7;
  color: var(--text-main);
  margin-bottom: 12px;
  border-radius: 10px;
  transition: all 0.3s;
}

.review-link:hover {
  border-color: var(--primary);
  background: #fbfbfd;
  transform: translateX(6px);
}

/* Comparison Cards */
#comparisonSection {
    background: transparent;
}

/* Animations */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-40px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Preset Guide Styles */
.preset-chip {
  padding: 8px 16px;
  background: #f1f3f5;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #495057;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}
.preset-chip.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 10px rgba(10, 84, 247, 0.2);
}
.preset-btn {
  background: #fff;
  border: 1px solid #eef2ff;
  border-radius: 10px;
  padding: 12px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.4;
}
.preset-btn:hover {
  border-color: var(--primary);
  background: #f8faff;
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
}
.preset-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Futuristic AI Simulation (Nano Style) */
#sketchPad {
  background: #f8faff;
  border: 1.5px solid #eef2ff;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  padding: 40px !important;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 480px;
  box-shadow: inset 0 2px 20px rgba(10, 84, 247, 0.03);
}

#sketchPad::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: 
    linear-gradient(rgba(10, 84, 247, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 84, 247, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
  z-index: 0;
}

#sketchPad::after {
  content: "AI SPACE ANALYSIS ENGINE v2.5 - READY";
  position: absolute;
  top: 15px; left: 20px;
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.4;
  letter-spacing: 0.1em;
}

.scan-line {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, rgba(10, 84, 247, 0.4), transparent);
  animation: scan 4s linear infinite;
  z-index: 5;
  pointer-events: none;
}

@keyframes scan {
  0% { transform: translateY(0px); opacity: 0; }
  20% { opacity: 0.8; }
  80% { opacity: 0.8; }
  100% { transform: translateY(480px); opacity: 0; }
}

.ai-pulse {
  animation: pulse-ring 2.5s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
}

@keyframes pulse-ring {
  0% { transform: scale(0.98); opacity: 0.9; }
  50% { transform: scale(1.02); opacity: 1; }
  100% { transform: scale(0.98); opacity: 0.9; }
}

.summary-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #ffffff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-premium);
  border: 1px solid #eef2ff;
  margin-bottom: 25px;
}

.summary-table th {
  background: var(--primary);
  color: white;
  padding: 12px 10px;
  font-size: 0.8rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: 0.05em;
  border: none;
  white-space: nowrap;
}

.summary-table td {
  padding: 12px 10px;
  border-bottom: 1px solid #f0f4fa;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-main);
  transition: all 0.2s;
  white-space: nowrap;
}

.summary-row:hover td {
  background: #f8faff;
}

.summary-row.active td {
  background: #f0f4ff;
  font-weight: 800;
  color: var(--primary);
}

.financial-cell {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  color: var(--primary);
}

/* Model Tabs & Recommendation Chips */
.spec-tabs {
  margin-top: 10px;
}

.spec-tab {
  background: #f5f5f7;
  border: 1.5px solid #d2d2d7;
  color: var(--text-main);
  border-radius: 14px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-soft);
}

.spec-tab:hover {
  border-color: var(--primary);
  background: #fff;
  transform: translateY(-2px);
}

.spec-tab.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: 0 8px 16px rgba(10, 84, 247, 0.2);
}

.recommend-chip {
  cursor: pointer;
  padding: 10px 20px;
  background: #fff;
  border: 1.5px solid #eee;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  transition: all 0.2s;
  display: flex;
  align-items: center;
}

.recommend-chip:hover {
  border-color: var(--primary);
  background: #f8faff;
  transform: translateY(-1px);
}

.recommend-chip.active {
  border-color: var(--primary);
  background: #f0f4ff;
  color: var(--primary);
}

/* Dynamic Review Cards */
.review-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.review-link {
  display: flex !important;
  align-items: center;
  padding: 16px;
  background: #ffffff;
  border: 1px solid #d2d2d7;
  color: var(--text-main) !important;
  border-radius: 14px;
  transition: all 0.3s;
  text-decoration: none;
}

.review-link:hover {
  border-color: var(--primary);
  background: #fbfbfd;
  transform: translateX(8px);
  box-shadow: 0 4px 12px rgba(10, 84, 247, 0.05);
}

.review-meta {
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 4px;
    display: block;
}

/* Mobile Optimization */
@media (max-width: 768px) {
  :root { --border-radius: 12px; }

  .container { padding: 18px 14px 60px; }

  h1 { font-size: 1.55rem !important; }
  h2 { font-size: 1.15rem !important; }

  .card { padding: 18px 14px !important; margin-bottom: 18px !important; }
  .grid-layout { grid-template-columns: 1fr !important; }

  /* Header: 좌우 → 세로 스택 */
  header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
    margin-bottom: 20px !important;
    padding-bottom: 14px !important;
  }
  header > div:last-child { text-align: left !important; }

  /* 고객 정보 2열 → 1열 */
  .cust-grid { grid-template-columns: 1fr !important; }

  /* 공간 입력 3열(고정폭) → 1열 공간구분 + 2열 가로세로 */
  .space-inner-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 12px !important;
  }
  .space-inner-grid > .form-group:first-child {
    grid-column: 1 / -1;
  }

  /* 가격 테이블: 가로 스크롤 */
  .pricing-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 12px;
  }
  .pricing-table-wrap > div { min-width: 520px; }

  /* 할인 헤더 행: 좌우 → 세로 */
  .discount-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 10px !important;
  }

  /* 프로모션 2열 → 1열 */
  .promo-grid { grid-template-columns: 1fr !important; }

  /* 체크박스 행: 세로 나열 */
  .checkbox-row {
    flex-direction: column !important;
    gap: 10px !important;
  }

  /* 비교 대시보드: 좌우 → 세로 스택 */
  .comparison-col-left,
  .comparison-col-right {
    min-width: 100% !important;
    width: 100% !important;
    flex: unset !important;
  }

  /* 분석 탭 */
  .analysis-tabs { gap: 5px !important; padding: 10px 8px !important; }
  .analysis-tab { padding: 8px 10px !important; font-size: 0.72rem !important; }

  /* 요약 테이블 */
  .summary-table { font-size: 0.72rem; }
  .summary-table th,
  .summary-table td {
    font-size: 0.7rem !important;
    padding: 8px 5px !important;
    white-space: normal !important;
  }

  /* 스케치패드 */
  #sketchPad { min-height: 260px !important; padding: 20px !important; }

  /* 하단 버튼 바 */
  .bottom-action-bar {
    flex-direction: column !important;
    gap: 10px !important;
    align-items: stretch !important;
  }
  .bottom-action-bar .btn { min-width: unset !important; width: 100% !important; }

  /* 스펙 탭 */
  .spec-tabs { grid-template-columns: 1fr 1fr !important; }

  /* iOS 줌 방지 */
  input[type="number"],
  input[type="text"],
  select { font-size: 16px !important; }

  /* 계약서 영역 */
  .document-section { padding: 30px 14px !important; }
  .document-section h1 { font-size: 1.3rem !important; }
  .document-section h2 { font-size: 1.05rem !important; }
  .document-section li { font-size: 0.85rem !important; line-height: 1.6 !important; }
}

/* Print Overrides */
@media print {
  .container { padding: 40px; }
  .no-print, .btn, #comparisonSection, .spec-tabs, .recommend-chip, .analysis-tabs { display: none !important; }
  .card { box-shadow: none !important; border: 1px solid #eee !important; margin-bottom: 20px; }
  h1 { font-size: 2.5rem; color: #000; }
  .result-val { color: #000 !important; }
}

body {
  background-color: #fcfcfd;
}