/* ==========================================================================
   Triangle Calculator Stylesheet - Calculator Archive
   Exact replica of reference layout (Image 2) + Interactive Geometry Canvas,
   Fraction Arithmetic, Comprehensive Results, Step-by-Step Proofs & Multi-Language
   ========================================================================== */

:root {
  --tri-green: #2e7d32;
  --tri-green-hover: #1b5e20;
  --tri-gray-btn: #8e9ca8;
  --tri-gray-btn-hover: #788591;
  --tri-box-bg: #f4f6f9;
  --tri-box-border: #d4dde6;
  --tri-input-border: #7f9db9;
  --tri-blue-header: #2b5a88;
  --tri-blue-link: #0044aa;
  --tri-blue-hover: #002277;
  --tri-result-bg: #f0fdf4;
  --tri-result-border: #bbf7d0;
  --tri-result-text: #166534;
  --tri-font: Arial, Helvetica, sans-serif;
}

/* Page Layout */
.tri-page-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 12px 16px 48px;
  font-family: var(--tri-font);
  color: #333333;
}

/* Top Utility & Breadcrumb Bar */
.tri-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid #e2e8f0;
}

.tri-breadcrumbs {
  font-size: 13px;
  color: #666;
}

.tri-breadcrumbs a {
  color: var(--tri-blue-link);
  text-decoration: none;
}

.tri-breadcrumbs a:hover {
  text-decoration: underline;
}

.tri-breadcrumbs .sep {
  margin: 0 4px;
  color: #999;
}

.tri-breadcrumbs .current {
  color: #333;
  font-weight: 500;
}

.tri-top-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.tri-action-btn {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 12px;
  color: #334155;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.15s ease;
}

.tri-action-btn:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #0f172a;
}

.tri-print-link {
  background: none;
  border: none;
  color: var(--tri-blue-link);
  font-size: 12.5px;
  cursor: pointer;
  padding: 4px 6px;
  text-decoration: none;
}

.tri-print-link:hover {
  text-decoration: underline;
}

/* Main Heading */
.tri-page-title {
  font-size: 24px;
  font-weight: bold;
  color: #0a3871;
  margin: 0 0 10px 0;
}

.tri-instruction {
  font-size: 13.5px;
  color: #333;
  line-height: 1.5;
  margin: 0 0 16px 0;
}

/* 2-Column Main Layout matching Reference Image 2 */
.tri-main-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 28px;
  align-items: start;
}

.tri-content-col {
  min-width: 0;
}

/* Main Triangle Calculator Container (Exact Replica of Image 2) */
.tri-calc-box {
  background: var(--tri-box-bg);
  border: 1px solid var(--tri-box-border);
  border-radius: 4px;
  padding: 24px 20px 20px;
  margin-bottom: 24px;
}

/* Interactive Diagram Wrapper */
.tri-diagram-stage {
  position: relative;
  width: 100%;
  max-width: 520px;
  margin: 0 auto 16px;
  min-height: 270px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.tri-svg-canvas {
  width: 100%;
  height: auto;
  max-width: 440px;
  display: block;
  overflow: visible;
}

/* Input Fields Over/Around the Diagram */
.tri-input-field-wrap {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  background: #ffffff;
  border: 1px solid var(--tri-input-border);
  border-radius: 2px;
  padding: 2px 4px;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.08);
}

.tri-input-field-wrap:focus-within {
  border-color: #0066cc;
  box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

.tri-diagram-input {
  width: 54px;
  height: 22px;
  border: none;
  outline: none;
  font-size: 13px;
  font-family: Arial, sans-serif;
  text-align: center;
  color: #000;
  background: transparent;
}

.tri-unit-symbol {
  font-size: 12px;
  color: #555;
  user-select: none;
}

/* Absolute Positioning for Diagram Inputs */
.tri-pos-angle-c {
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

.tri-pos-angle-a {
  position: absolute;
  bottom: 46px;
  left: 8px;
  z-index: 10;
}

.tri-pos-angle-b {
  position: absolute;
  bottom: 46px;
  right: 8px;
  z-index: 10;
}

.tri-pos-side-b {
  position: absolute;
  top: 42%;
  left: 18px;
  transform: translateY(-50%);
  z-index: 10;
}

.tri-pos-side-a {
  position: absolute;
  top: 42%;
  right: 18px;
  transform: translateY(-50%);
  z-index: 10;
}

.tri-pos-side-c {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
}

/* Controls Below Triangle */
.tri-unit-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 16px 0 18px;
  font-size: 13.5px;
  color: #333;
}

.tri-select-unit {
  border: 1px solid var(--tri-input-border);
  border-radius: 2px;
  padding: 3px 8px;
  font-size: 13px;
  font-family: Arial, sans-serif;
  background: #ffffff;
  color: #000;
  cursor: pointer;
}

/* Action Buttons */
.tri-btn-group {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
}

.tri-btn-green {
  background: var(--tri-green);
  color: #ffffff;
  border: none;
  border-radius: 3px;
  padding: 6px 18px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  transition: background 0.15s ease;
}

.tri-btn-green:hover {
  background: var(--tri-green-hover);
}

.tri-play-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  font-size: 9px;
  line-height: 1;
  padding-left: 2px;
}

.tri-btn-gray {
  background: var(--tri-gray-btn);
  color: #ffffff;
  border: none;
  border-radius: 3px;
  padding: 6px 16px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.tri-btn-gray:hover {
  background: var(--tri-gray-btn-hover);
}

/* Comprehensive Results Section */
.tri-results-wrap {
  margin-top: 24px;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 18px 20px;
}

.tri-results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  border-bottom: 1px solid #e2e8f0;
  padding-bottom: 8px;
}

.tri-results-title {
  font-size: 16px;
  font-weight: bold;
  color: #0a3871;
  margin: 0;
}

.tri-class-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 12px;
}

/* Results Data Table */
.tri-data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}

.tri-data-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 10px 14px;
}

.tri-data-label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #64748b;
  margin-bottom: 4px;
}

.tri-data-val {
  font-size: 16px;
  font-weight: bold;
  color: #0f172a;
}

.tri-data-sub {
  font-size: 12px;
  color: #64748b;
  margin-top: 2px;
}

/* Interactive Solved Triangle Visualizer & Toggles */
.tri-viz-section {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 18px;
}

.tri-viz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.tri-viz-title {
  font-size: 14px;
  font-weight: bold;
  color: #1e293b;
}

.tri-toggle-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tri-toggle-btn {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 3px;
  font-size: 11.5px;
  color: #475569;
  padding: 3px 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.tri-toggle-btn.active {
  background: #2b5a88;
  border-color: #2b5a88;
  color: #ffffff;
}

.tri-solved-canvas-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 220px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 12px;
}

/* Step-by-Step Proof Details */
.tri-steps-box {
  background: #fcfcfc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 14px 16px;
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #334155;
}

.tri-steps-title {
  font-size: 13.5px;
  font-weight: bold;
  color: #0a3871;
  margin-bottom: 8px;
}

.tri-formula-line {
  font-family: "Courier New", Courier, monospace;
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 3px;
  color: #0f172a;
}

/* Fraction Arithmetic Suite (Core Requirement 1 & 5) */
.tri-fraction-section {
  background: #ffffff;
  border: 1px solid var(--tri-box-border);
  border-radius: 4px;
  padding: 18px 20px;
  margin-top: 24px;
}

.tri-section-heading {
  font-size: 16px;
  font-weight: bold;
  color: #0a3871;
  margin: 0 0 8px 0;
}

.tri-section-desc {
  font-size: 13px;
  color: #555;
  margin-bottom: 14px;
  line-height: 1.5;
}

.tri-frac-form {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 14px 16px;
}

.tri-frac-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.tri-frac-input {
  width: 48px;
  height: 26px;
  border: 1px solid var(--tri-input-border);
  border-radius: 2px;
  text-align: center;
  font-size: 14px;
  font-weight: bold;
}

.tri-frac-bar {
  width: 100%;
  height: 2px;
  background: #334155;
}

.tri-op-select {
  border: 1px solid var(--tri-input-border);
  border-radius: 2px;
  padding: 4px 6px;
  font-size: 16px;
  font-weight: bold;
  background: #ffffff;
}

.tri-frac-result-box {
  background: var(--tri-result-bg);
  border: 1px solid var(--tri-result-border);
  border-radius: 4px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--tri-result-text);
  margin-bottom: 14px;
}

/* Fraction Charts Grid */
.tri-charts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 14px;
}

.tri-chart-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 12px;
  text-align: center;
}

.tri-chart-title {
  font-size: 12.5px;
  font-weight: bold;
  color: #475569;
  margin-bottom: 8px;
}

/* Right Sidebar (Exact Replica of Reference Image 2) */
.tri-sidebar-col {
  min-width: 0;
}

.tri-search-form {
  position: relative;
  display: flex;
  margin-bottom: 16px;
}

.tri-search-input {
  flex: 1;
  border: 1px solid #7f9db9;
  border-right: none;
  padding: 5px 8px;
  font-size: 13px;
  border-radius: 2px 0 0 2px;
  outline: none;
}

.tri-search-input:focus {
  border-color: #2b5a88;
}

.tri-search-btn {
  background: var(--tri-blue-header);
  color: #ffffff;
  border: 1px solid var(--tri-blue-header);
  border-radius: 0 2px 2px 0;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
}

.tri-search-btn:hover {
  background: #1e3f60;
}

.tri-search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-top: none;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  max-height: 240px;
  overflow-y: auto;
  z-index: 100;
  display: none;
}

.tri-search-item {
  padding: 6px 10px;
  font-size: 12.5px;
  color: #334155;
  cursor: pointer;
  border-bottom: 1px solid #f1f5f9;
}

.tri-search-item:hover {
  background: #f8fafc;
  color: #0f172a;
}

/* Math Calculators Card (Image 2 Replica) */
.tri-side-card {
  border: 1px solid #b0c4de;
  border-radius: 2px;
  background: #ffffff;
  overflow: hidden;
}

.tri-side-card-title {
  background: var(--tri-blue-header);
  color: #ffffff;
  font-weight: bold;
  font-size: 13.5px;
  padding: 6px 10px;
}

.tri-side-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 8px 10px;
  gap: 6px 12px;
  font-size: 12.5px;
}

.tri-side-card-grid a {
  color: var(--tri-blue-link);
  text-decoration: none;
}

.tri-side-card-grid a:hover {
  text-decoration: underline;
}

.tri-side-card-grid a.active {
  color: #333333;
  font-weight: bold;
  text-decoration: none;
  cursor: default;
}

.tri-side-card-footer {
  background: #eaeff5;
  border-top: 1px solid #d4dde6;
  padding: 6px 8px;
  font-size: 11.5px;
  text-align: center;
  color: #666;
}

.tri-side-card-footer a {
  color: var(--tri-blue-link);
  text-decoration: none;
}

.tri-side-card-footer a:hover {
  text-decoration: underline;
}

.tri-side-card-footer .sep {
  margin: 0 3px;
  color: #999;
}

/* SEO / AEO / GEO Deep Educational Content */
.tri-seo-content {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
  line-height: 1.65;
  color: #334155;
}

.tri-seo-content h2 {
  font-size: 20px;
  color: #0a3871;
  margin: 24px 0 12px;
}

.tri-seo-content h3 {
  font-size: 16px;
  color: #0a3871;
  margin: 18px 0 8px;
}

.tri-seo-content p {
  font-size: 14px;
  margin: 0 0 12px;
}

.tri-seo-content ul {
  padding-left: 20px;
  margin: 0 0 16px;
  font-size: 14px;
}

.tri-seo-content li {
  margin-bottom: 6px;
}

/* AEO Q&A Card */
.tri-aeo-card {
  background: #f8fafc;
  border-left: 3px solid #0044aa;
  padding: 12px 16px;
  margin: 14px 0;
  border-radius: 0 4px 4px 0;
}

.tri-aeo-q {
  font-weight: bold;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 4px;
}

.tri-aeo-a {
  font-size: 13.5px;
  color: #475569;
}

/* Comparison Table */
.tri-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.tri-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.tri-table th {
  background: #f1f5f9;
  color: #0f172a;
  font-weight: 600;
  padding: 8px 10px;
  border: 1px solid #cbd5e1;
}

.tri-table td {
  padding: 8px 10px;
  border: 1px solid #e2e8f0;
  color: #334155;
}

.tri-table tr:nth-child(even) {
  background: #f8fafc;
}

/* FAQ Accordion */
.tri-faq-item {
  border-bottom: 1px solid #e2e8f0;
  padding: 10px 0;
}

.tri-faq-q {
  font-weight: 600;
  color: #0a3871;
  font-size: 14.5px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tri-faq-a {
  margin-top: 8px;
  font-size: 13.5px;
  color: #475569;
  line-height: 1.6;
}

/* Modal Dialogs */
.tri-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.tri-modal-card {
  background: #ffffff;
  border-radius: 4px;
  max-width: 540px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.tri-modal-header {
  padding: 12px 16px;
  border-bottom: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
}

.tri-modal-title {
  margin: 0;
  font-size: 15px;
  font-weight: bold;
  color: #0a3871;
}

.tri-modal-close {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: #64748b;
}

.tri-modal-body {
  padding: 16px;
  overflow-y: auto;
  font-size: 13.5px;
  line-height: 1.5;
}

.tri-modal-footer {
  padding: 10px 16px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  background: #f8fafc;
}

/* Print Styling */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  /* Default print hides chrome and sidebars */
  .site-header,
  .site-footer,
  .tri-sidebar-col,
  .tri-top-actions,
  .tri-btn-group,
  .tri-toggle-bar,
  #tri-saved-modal,
  .tri-search-dropdown,
  .tri-modal-footer,
  .tri-modal-close {
    display: none !important;
  }

  /* When printing from modal, isolate and full-bleed the modal content */
  body.tri-printing-modal * {
    visibility: hidden;
  }

  body.tri-printing-modal #tri-print-modal,
  body.tri-printing-modal #tri-print-modal * {
    visibility: visible;
  }

  body.tri-printing-modal #tri-print-modal {
    display: block !important;
    position: absolute !important;
    left: 0 !important;
    top: 0 !important;
    width: 100% !important;
    height: auto !important;
    background: #ffffff !important;
    padding: 0 !important;
    margin: 0 !important;
    z-index: 999999 !important;
  }

  body.tri-printing-modal .tri-modal-card {
    max-width: 100% !important;
    width: 100% !important;
    box-shadow: none !important;
    border: none !important;
    padding: 0 !important;
    max-height: none !important;
  }

  body.tri-printing-modal #tri-print-content {
    max-height: none !important;
    overflow: visible !important;
    padding: 0 !important;
  }

  /* Page print cleanup */
  .tri-page-container {
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }
  .tri-main-layout {
    grid-template-columns: 1fr !important;
  }
  .tri-calc-box, .tri-results-wrap, .tri-fraction-section {
    border: 1px solid #cbd5e1 !important;
    box-shadow: none !important;
    break-inside: avoid;
  }
}

/* Responsive Media Queries */
@media (max-width: 768px) {
  .tri-main-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .tri-sidebar-col {
    margin-top: 20px;
  }
  .tri-diagram-stage {
    min-height: 290px;
  }
  .tri-pos-angle-a {
    left: 2px;
  }
  .tri-pos-angle-b {
    right: 2px;
  }
  .tri-pos-side-b {
    left: 4px;
  }
  .tri-pos-side-a {
    right: 4px;
  }
}