/* ========================================================================
   Bund Wall Calculator - Apple-Inspired Premium Design
   WattWorks Design - Caribbean Engineering Excellence
   ======================================================================== */

/* Using system fonts for subtle, refined typography */

/* ===== CSS Variables - Refined Industrial Palette ===== */
:root {
  /* Light Mode - Premium Construction */
  --bg-primary: #F5F1E8;
  --bg-secondary: #FDFCFA;
  --bg-tertiary: #FFFFFF;
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;

  /* Refined Earth Tones */
  --earth: #C85A28;
  --earth-light: #E07944;
  --steel: #3E5266;
  --steel-light: #5B7A9D;
  --concrete: #8B7355;
  --concrete-light: #A68A6D;

  /* Status Colors */
  --success: #5A8F5A;
  --warning: #E6A23C;
  --danger: #D64545;

  /* Shadows - Apple Style */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.08);

  /* Border */
  --border: rgba(0, 0, 0, 0.06);
  --border-hover: rgba(200, 90, 40, 0.2);

  /* Transition */
  --transition: cubic-bezier(0.4, 0.0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1C1C1E;
  --bg-tertiary: #2C2C2E;
  --text-primary: #F5F5F7;
  --text-secondary: #A1A1A6;
  --text-tertiary: #6E6E73;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(224, 121, 68, 0.3);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.6);
}

/* ===== Global Reset ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Roboto", "Helvetica Neue", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.4s var(--transition), color 0.4s var(--transition);
}

/* ===== Container ===== */
.container {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 max(24px, env(safe-area-inset-left));
}

/* ===== Header/Navigation ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 241, 232, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s var(--transition);
}

[data-theme="dark"] .header {
  background: rgba(0, 0, 0, 0.8);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 24px;
}

.header h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  font-size: 19px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* ===== Theme Toggle (Apple Style) ===== */
.theme-toggle {
  position: relative;
  width: 51px;
  height: 31px;
  background: var(--bg-tertiary);
  border-radius: 16px;
  cursor: pointer;
  border: 1.5px solid var(--border);
  transition: all 0.3s var(--transition);
  box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
  border-color: var(--border-hover);
}

.theme-toggle::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 25px;
  height: 25px;
  background: linear-gradient(135deg, var(--earth) 0%, var(--earth-light) 100%);
  border-radius: 50%;
  transition: all 0.3s var(--transition);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .theme-toggle::before {
  left: 21px;
  background: linear-gradient(135deg, var(--steel-light) 0%, var(--steel) 100%);
}

.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 20px;
  transition: all 0.3s var(--transition);
}

.back-link:hover {
  background: rgba(200, 90, 40, 0.08);
  color: var(--earth);
}

/* ===== Grid Layout ===== */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

@media (max-width: 1024px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Cards - Apple Premium Style ===== */
.card {
  background: var(--bg-tertiary);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.4s var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.card-header {
  padding: 24px 32px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.card-header h2 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  line-height: 1.3;
}

/* ===== Tabs - Apple Style ===== */
.tabs {
  display: flex;
  gap: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  background: transparent;
  border: none;
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s var(--transition);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  letter-spacing: 0;
  line-height: 1.4;
}

.tab:hover {
  color: var(--text-primary);
  background: rgba(200, 90, 40, 0.04);
}

.tab.active {
  color: var(--earth);
  border-bottom-color: var(--earth);
}

.tab-content {
  display: none;
  padding: 32px;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s var(--transition);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== Form Elements - Apple Premium ===== */
label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0;
  line-height: 1.4;
}

input,
select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 400;
  font-family: inherit;
  line-height: 1.5;
  transition: all 0.3s var(--transition);
  margin-bottom: 20px;
  -webkit-appearance: none;
  appearance: none;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--earth);
  background: var(--bg-tertiary);
  box-shadow: 0 0 0 4px rgba(200, 90, 40, 0.08);
}

input:hover,
select:hover {
  border-color: var(--border-hover);
}

input.error {
  border-color: var(--danger);
  animation: shake 0.3s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

select {
  background-image: url('data:image/svg+xml,<svg width="14" height="8" viewBox="0 0 14 8" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M1 1L7 7L13 1" stroke="%236E6E73" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/></svg>');
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

@media (max-width: 600px) {
  .row {
    grid-template-columns: 1fr;
  }
}

/* ===== Buttons - Apple Premium ===== */
button {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  line-height: 1.4;
  letter-spacing: 0;
  cursor: pointer;
  transition: all 0.3s var(--transition);
  box-shadow: var(--shadow-sm);
}

button:active {
  transform: scale(0.98);
}

#calcBtn,
button[type="button"]:first-of-type {
  background: linear-gradient(135deg, var(--earth) 0%, var(--earth-light) 100%);
  color: white;
  box-shadow: 0 4px 16px rgba(200, 90, 40, 0.25);
}

#calcBtn:hover {
  box-shadow: 0 8px 24px rgba(200, 90, 40, 0.35);
  transform: translateY(-1px);
}

#calcBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary,
.btn-ghost {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover,
.btn-ghost:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

/* ===== Tank Input Styling ===== */
.tank-input {
  padding: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 16px;
  transition: all 0.3s var(--transition);
}

.tank-header {
  font-size: 12px;
  font-weight: 600;
  color: var(--earth);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  line-height: 1.3;
  text-align: center;
}

/* ===== Results Display ===== */
.result {
  padding: 20px 24px;
  margin-bottom: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s var(--transition);
}

.result:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
  transform: translateX(2px);
}

.result .small {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  font-weight: 500;
  line-height: 1.3;
}

.result .val {
  font-size: 32px;
  font-weight: 600;
  color: var(--earth);
  letter-spacing: -0.015em;
  line-height: 1.2;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
}

/* ===== Info Boxes - Apple Style ===== */
.info,
.info-box,
.warning-box {
  padding: 16px 20px;
  border-radius: 16px;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0;
  margin-bottom: 16px;
  border-left: 3px solid;
}

.info {
  background: rgba(200, 90, 40, 0.06);
  border-color: var(--earth);
  color: var(--text-secondary);
}

.info-box {
  background: rgba(91, 122, 157, 0.06);
  border-color: var(--steel-light);
  color: var(--text-secondary);
}

.warning-box {
  background: rgba(230, 162, 60, 0.06);
  border-color: var(--warning);
  color: var(--text-secondary);
}

.error-msg,
.warning-msg {
  font-size: 12px;
  margin-top: -16px;
  margin-bottom: 16px;
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: 0;
  display: none;
}

.error-msg {
  color: var(--danger);
}

.warning-msg {
  color: var(--warning);
}

.error-msg.show,
.warning-msg.show {
  display: block;
}

/* ===== Canvas - Premium Style ===== */
canvas {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  height: auto;
}

/* ===== History Items ===== */
.history-item {
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 12px;
  cursor: pointer;
  transition: all 0.3s var(--transition);
  position: relative;
}

.history-item:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.history-item .delete-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--danger);
  color: white;
  border: none;
  padding: 4px 12px;
  border-radius: 8px;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.3s var(--transition);
}

.history-item:hover .delete-btn {
  opacity: 1;
}

/* ===== Footer ===== */
footer {
  margin-top: 48px;
  padding: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.6;
}

footer a {
  color: var(--earth);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s var(--transition);
}

footer a:hover {
  color: var(--earth-light);
}

/* ===== Storage Indicator ===== */
.storage-indicator {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.4;
  color: var(--text-secondary);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  display: none;
  animation: fadeIn 0.3s var(--transition);
  z-index: 1000;
}

.storage-indicator.error {
  background: rgba(213, 69, 69, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

/* ===== Scrollbar - Apple Style ===== */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--concrete);
  border-radius: 6px;
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--earth);
}

/* ===== Print-Only Section - Hidden on Screen ===== */
.print-only-section {
  display: none;
}

/* ===== Print Styles ===== */
@media print {
  /* Force light mode for all printed content - override dark theme if active */
  :root {
    --bg-primary: #ffffff !important;
    --bg-secondary: #f9f9f9 !important;
    --text-primary: #000000 !important;
    --text-secondary: #333333 !important;
    --text-muted: #666666 !important;
    --border-color: #e0e0e0 !important;
    --accent: #c85a28 !important;
    --concrete: #ddd !important;
    --earth: #999 !important;
  }

  /* Reset page styling for clean print */
  * {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    background: transparent !important;
  }

  @page {
    margin: 1.5cm;
    size: A4;
  }

  body {
    background: white !important;
    color: #000 !important;
    font-size: 11pt;
    line-height: 1.4;
    margin: 0;
    padding: 0;
  }

  /* Hide unnecessary elements and old results section */
  .header,
  .tabs,
  .actions,
  .back-link,
  .storage-indicator,
  .theme-toggle,
  .info-box,
  #calculatorTab,
  #historyTab,
  #infoTab,
  #diagramTab,
  footer,
  .btn-small,
  .btn-secondary,
  button,
  .grid,
  .card {
    display: none !important;
  }

  /* Show the print-only section */
  .print-only-section {
    display: block !important;
  }

  /* Container and grid adjustments */
  .container {
    max-width: 100%;
    padding: 0;
    margin: 0;
  }

  .grid {
    display: block;
    gap: 0;
    margin: 0;
    padding: 0;
  }

  /* Card styling for print */
  .card {
    border: none;
    box-shadow: none;
    border-radius: 0;
    padding: 0;
    margin: 0;
    background: white;
    break-inside: avoid;
  }

  /* Page 1: Results Header */
  .card-header {
    text-align: center;
    margin-bottom: 20pt;
    padding-bottom: 10pt;
    border-bottom: 2pt solid #333;
  }

  .card-header h2 {
    font-size: 18pt;
    font-weight: 700;
    margin: 0 0 6pt 0;
    color: #000;
  }

  .card-header::after {
    content: "Generated: " attr(data-date);
    display: block;
    font-size: 9pt;
    color: #666;
    margin-top: 6pt;
    font-weight: normal;
  }

  /* Results Table - Professional Engineering Report Format */
  #results {
    display: table !important;
    width: 100% !important;
    border-collapse: collapse !important;
    padding: 0 !important;
    margin: 0 !important;
    border: 2pt solid #333 !important;
  }

  .result {
    display: table-row !important;
    page-break-inside: avoid;
  }

  /* Alternating row colors for readability */
  .result:nth-child(even) {
    background: #f9f9f9 !important;
  }

  .result:nth-child(odd) {
    background: #ffffff !important;
  }

  /* Table cell styling for labels (left column) */
  .result .small {
    display: table-cell !important;
    padding: 10pt 14pt !important;
    font-size: 10.5pt !important;
    color: #000 !important;
    font-weight: 600 !important;
    border-right: 1pt solid #ccc !important;
    border-bottom: 1pt solid #e0e0e0 !important;
    vertical-align: middle !important;
    width: 55% !important;
    text-transform: none !important;
    letter-spacing: normal !important;
    line-height: 1.4 !important;
  }

  /* Table cell styling for values (right column) */
  .result .val {
    display: table-cell !important;
    padding: 10pt 14pt !important;
    font-size: 11.5pt !important;
    font-weight: 700 !important;
    color: #000 !important;
    text-align: right !important;
    border-bottom: 1pt solid #e0e0e0 !important;
    vertical-align: middle !important;
    width: 45% !important;
    white-space: nowrap !important;
    line-height: 1.4 !important;
  }

  /* Remove border from last row */
  .result:last-of-type .small,
  .result:last-of-type .val {
    border-bottom: none !important;
  }

  /* Auto-correction banner */
  #autoCorrectionBanner {
    background: #fff3cd !important;
    border: 1.5pt solid #856404 !important;
    padding: 12pt !important;
    margin-bottom: 16pt !important;
    border-radius: 3pt;
    font-size: 9.5pt;
    page-break-inside: avoid;
    display: block !important;
  }

  /* Plinth section - Professional Table Format */
  .plinth-section {
    margin-top: 24pt !important;
    padding-top: 0 !important;
    border-top: none !important;
    page-break-inside: avoid;
    page-break-before: auto;
  }

  .plinth-section h3 {
    font-size: 14pt;
    font-weight: 700;
    margin: 0 0 12pt 0;
    padding: 8pt 12pt;
    color: #000;
    background: #e8e8e8 !important;
    border: 2pt solid #333 !important;
    border-bottom: none !important;
    text-align: center;
  }

  /* Plinth dimensions as a table */
  #plinthDimensions {
    display: table !important;
    width: 100% !important;
    border-collapse: collapse !important;
    border: 2pt solid #333 !important;
    border-top: none !important;
    margin-bottom: 8pt !important;
  }

  #plinthDimensions .result {
    display: table-row !important;
  }

  #plinthDimensions .result .small {
    display: table-cell !important;
    padding: 10pt 14pt !important;
    font-size: 10.5pt !important;
    color: #000 !important;
    font-weight: 600 !important;
    border-right: 1pt solid #ccc !important;
    border-bottom: 1pt solid #e0e0e0 !important;
    vertical-align: middle !important;
    width: 55% !important;
  }

  #plinthDimensions .result .val {
    display: table-cell !important;
    padding: 10pt 14pt !important;
    font-size: 11.5pt !important;
    font-weight: 700 !important;
    color: #000 !important;
    text-align: right !important;
    border-bottom: 1pt solid #e0e0e0 !important;
    vertical-align: middle !important;
    width: 45% !important;
  }

  #plinthDimensions .result:last-child .small,
  #plinthDimensions .result:last-child .val {
    border-bottom: none !important;
  }

  #plinthDimensions .result:nth-child(even) {
    background: #f9f9f9 !important;
  }

  #plinthDimensions .result:nth-child(odd) {
    background: #ffffff !important;
  }

  .plinth-height-note {
    font-size: 9pt;
    color: #666;
    font-style: italic;
    padding: 8pt 12pt;
    background: #f5f5f5 !important;
    border: 1pt solid #ddd !important;
    border-top: none !important;
  }

  /* Notes styling - now appearing within table cells */
  .result .small[id$="Note"],
  .result #lengthNote,
  .result #widthNote,
  .result #heightNote,
  .result #netVolNote,
  .result #sfNote {
    display: block !important;
    font-size: 8.5pt !important;
    color: #666 !important;
    font-weight: normal !important;
    font-style: italic !important;
    margin-top: 4pt !important;
    padding-top: 4pt !important;
    border-top: 0.5pt dashed #ccc !important;
    line-height: 1.3 !important;
  }

  /* Page 2: Diagram */
  #diagramTab {
    display: block !important;
    page-break-before: always;
    padding: 20pt 0;
  }

  #diagramTab h2 {
    font-size: 18pt;
    font-weight: 700;
    text-align: center;
    margin: 0 0 20pt 0;
    padding-bottom: 10pt;
    border-bottom: 2pt solid #333;
    color: #000;
  }

  #diagramContainer {
    background: white !important;
    border: 1px solid #ddd !important;
    padding: 20pt !important;
    text-align: center;
    page-break-inside: avoid;
  }

  #bundCanvas {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
    margin: 0 auto !important;
  }

  /* Diagram info box */
  #diagramTab .info-box {
    display: block !important;
    margin-top: 12pt;
    padding: 10pt;
    background: #f5f5f5 !important;
    border: 1px solid #ccc !important;
    border-radius: 4pt;
    font-size: 9pt;
    line-height: 1.5;
    page-break-inside: avoid;
  }

  #diagramTab .info-box strong {
    font-weight: 700;
    color: #000;
  }

  /* Footer branding */
  .card::after {
    content: "WattWorks Design - Bund Wall Calculator | wattworksdesign.com | EPA-Compliant Secondary Containment";
    display: block;
    text-align: center;
    font-size: 8pt;
    color: #999;
    margin-top: 20pt;
    padding-top: 10pt;
    border-top: 1px solid #ddd;
  }

  /* Ensure clean page breaks */
  .result,
  .plinth-section,
  #autoCorrectionBanner {
    page-break-inside: avoid;
  }

  /* ========================================
     NEW PRINT REPORT TABLE STYLES
     ======================================== */

  /* Print Header */
  .print-header {
    text-align: center;
    margin-bottom: 24pt;
    padding-bottom: 12pt;
    border-bottom: 3pt solid #000;
  }

  .print-header h1 {
    font-size: 22pt;
    font-weight: 700;
    margin: 0 0 8pt 0;
    color: #000;
    text-transform: uppercase;
    letter-spacing: 1pt;
  }

  .print-subtitle {
    font-size: 12pt;
    color: #666;
    margin: 0 0 8pt 0;
    font-weight: 400;
  }

  .print-date {
    font-size: 10pt;
    color: #999;
    margin: 0;
    font-style: italic;
  }

  /* Print Warnings */
  .print-warnings {
    background: #fff3cd !important;
    border: 2pt solid #856404 !important;
    padding: 12pt 16pt !important;
    margin-bottom: 20pt !important;
    border-radius: 4pt;
    font-size: 10pt;
    font-weight: 600;
    color: #856404 !important;
    page-break-inside: avoid;
  }

  /* Section Titles */
  .print-section-title {
    font-size: 16pt;
    font-weight: 700;
    color: #000;
    margin: 0 0 12pt 0;
    padding: 10pt 14pt;
    background: #e8e8e8 !important;
    border: 2pt solid #333 !important;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.5pt;
  }

  /* Table Container */
  .print-table-container {
    margin-bottom: 24pt;
    page-break-inside: avoid;
  }

  /* Professional Results Table */
  .print-results-table {
    width: 100%;
    border-collapse: collapse;
    border: 2pt solid #333 !important;
    margin-bottom: 0;
  }

  .print-results-table thead {
    background: #333 !important;
    color: #fff !important;
  }

  .print-results-table thead th {
    padding: 12pt 14pt;
    font-size: 11pt;
    font-weight: 700;
    text-align: center;
    border-right: 1pt solid #555;
    text-transform: uppercase;
    letter-spacing: 0.5pt;
  }

  .print-results-table thead th:last-child {
    border-right: none;
  }

  /* Table Body Rows */
  .print-results-table tbody tr {
    page-break-inside: avoid;
  }

  .print-results-table tbody tr:nth-child(4n+1),
  .print-results-table tbody tr:nth-child(4n+2) {
    background: #ffffff !important;
  }

  .print-results-table tbody tr:nth-child(4n+3),
  .print-results-table tbody tr:nth-child(4n+4) {
    background: #f9f9f9 !important;
  }

  /* Parameter Column (left) */
  .print-results-table td.print-param {
    padding: 11pt 14pt;
    font-size: 10.5pt;
    font-weight: 600;
    color: #000;
    border-right: 1pt solid #ccc;
    border-bottom: 1pt solid #e0e0e0;
    vertical-align: middle;
    width: 50%;
  }

  /* Value Column (center) */
  .print-results-table td.print-value {
    padding: 11pt 14pt;
    font-size: 12pt;
    font-weight: 700;
    color: #000;
    text-align: right;
    border-right: 1pt solid #ccc;
    border-bottom: 1pt solid #e0e0e0;
    vertical-align: middle;
    width: 30%;
  }

  /* Unit Column (right) */
  .print-results-table td.print-unit {
    padding: 11pt 14pt;
    font-size: 10pt;
    font-weight: 500;
    color: #333;
    text-align: left;
    border-bottom: 1pt solid #e0e0e0;
    vertical-align: middle;
    width: 20%;
  }

  /* Note Rows */
  .print-note-row {
    background: #fffbf0 !important;
  }

  .print-note-cell {
    padding: 8pt 14pt !important;
    font-size: 9pt !important;
    font-style: italic;
    color: #666 !important;
    border-bottom: 1pt solid #e0e0e0 !important;
    font-weight: normal !important;
  }

  /* Remove border from last row */
  .print-results-table tbody tr:last-child td {
    border-bottom: none !important;
  }

  /* Print Notes Section */
  .print-notes {
    margin: 20pt 0;
    padding: 12pt 16pt;
    background: #f5f5f5 !important;
    border: 1pt solid #ccc !important;
    border-radius: 4pt;
    page-break-inside: avoid;
  }

  .print-note {
    font-size: 9.5pt;
    color: #333;
    margin: 6pt 0;
    line-height: 1.5;
  }

  .print-note strong {
    color: #000;
    font-weight: 700;
  }

  /* Print Footer */
  .print-footer {
    margin-top: 24pt;
    padding-top: 12pt;
    border-top: 2pt solid #333;
    text-align: center;
    page-break-inside: avoid;
  }

  .print-footer p {
    margin: 4pt 0;
    font-size: 9pt;
    color: #666;
    line-height: 1.5;
  }

  .print-footer p strong {
    color: #000;
    font-weight: 700;
  }

  .print-disclaimer {
    margin-top: 12pt !important;
    padding: 10pt;
    background: #fff3e0 !important;
    border: 1pt solid #ff9800 !important;
    font-size: 8.5pt !important;
    color: #e65100 !important;
    border-radius: 3pt;
  }

  /* Diagram Page */
  .print-diagram-page {
    page-break-before: always;
  }

  .print-diagram-wrapper {
    text-align: center;
    padding: 20pt;
    background: white !important;
    border: 1pt solid #ddd !important;
    border-radius: 4pt;
    page-break-inside: avoid;
  }

  #printCanvas {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
    margin: 0 auto !important;
  }

  .print-diagram-key {
    margin-top: 16pt;
    padding: 10pt 12pt;
    background: #f5f5f5 !important;
    border: 1pt solid #ccc !important;
    border-radius: 4pt;
    font-size: 9pt;
    text-align: left;
    line-height: 1.6;
  }

  .print-diagram-key strong {
    font-weight: 700;
    color: #000;
  }
}

/* ===== Mobile Responsive ===== */
@media (max-width: 768px) {
  .header-content {
    padding: 0 16px;
  }

  .card-header {
    padding: 20px 24px;
  }

  .tab-content {
    padding: 24px 20px;
  }

  .result .val {
    font-size: 28px;
  }

  button {
    min-height: 44px;
    touch-action: manipulation;
  }
}