/* ==========================================================================
   Binary Calculator & Binary / Decimal Converter Stylesheet
   Matching exact reference images and Calculator Archive design system
   ========================================================================== */

/* Page Wrapper & Layout */
.bin-page-wrapper {
  max-width: 980px;
  margin: 0 auto;
  padding: 12px 20px 60px;
  font-family: Arial, Helvetica, sans-serif;
  color: #333333;
  background-color: #ffffff;
  box-sizing: border-box;
  min-height: 85vh;
}

/* Top Utility Action Bar (Quick Converter Modal, Save, Print) */
.bin-top-toolbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.bin-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
  background-color: #f8fafc;
  color: #334155;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  text-decoration: none;
}

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

.bin-tool-btn.primary {
  background-color: #0844a4;
  color: #ffffff;
  border-color: #0844a4;
}

.bin-tool-btn.primary:hover {
  background-color: #06347c;
  border-color: #06347c;
}

.bin-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: 9px;
  background-color: #2563eb;
  color: #ffffff;
  font-size: 10.5px;
  font-weight: bold;
}

/* Breadcrumbs matching reference image */
.bin-breadcrumbs {
  font-size: 11.5px;
  color: #0844a4;
  margin-bottom: 6px;
}

.bin-breadcrumbs a {
  color: #0844a4;
  text-decoration: underline;
}

.bin-breadcrumbs a:hover {
  color: #002277;
}

.bin-breadcrumbs .sep {
  color: #555555;
  margin: 0 4px;
}

.bin-breadcrumbs .current {
  color: #333333;
}

/* Main Heading H1 */
.bin-main-heading {
  font-size: 26px;
  font-weight: bold;
  color: #0844a4;
  margin: 0 0 8px 0;
  line-height: 1.2;
}

/* Intro Paragraph */
.bin-intro-text {
  font-size: 13px;
  color: #333333;
  margin: 0 0 14px 0;
  line-height: 1.45;
  max-width: 680px;
}

/* Instruction Banner matching reference screenshot */
.bin-action-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #2b5d84;
  color: #ffffff;
  padding: 8px 14px;
  border-radius: 3px;
  margin-bottom: 20px;
  font-size: 13.5px;
  font-weight: 500;
}

.bin-banner-icon {
  width: 22px;
  height: 22px;
  background-color: #ffffff;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #2b5d84;
  flex-shrink: 0;
}

/* Main 2-Column Layout Row */
.bin-layout-row {
  display: flex;
  gap: 36px;
  align-items: flex-start;
}

.bin-left-column {
  flex: 1;
  min-width: 0;
}

.bin-sidebar-column {
  width: 280px;
  flex-shrink: 0;
}

/* Section Headings H2 */
.bin-section-title {
  font-size: 17px;
  font-weight: bold;
  color: #0844a4;
  margin: 22px 0 8px 0;
}

.bin-section-title:first-child {
  margin-top: 0;
}

/* Calculation Card matching reference screenshot */
.bin-calc-card {
  background-color: #f2f4f7;
  border: 1px solid #d1d5db;
  border-radius: 3px;
  padding: 14px 18px;
  margin-bottom: 10px;
}

/* Calculation Input Row */
.bin-input-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: #1e293b;
  margin-bottom: 12px;
}

.bin-input-label {
  font-size: 13.5px;
  color: #333333;
  margin-right: 4px;
}

.bin-input {
  height: 28px;
  padding: 2px 8px;
  font-size: 14px;
  font-family: Consolas, Monaco, "Courier New", Courier, monospace;
  font-weight: 600;
  color: #0f172a;
  background-color: #ffffff;
  border: 1px solid #7f9db9;
  border-radius: 2px;
  outline: none;
  box-sizing: border-box;
}

.bin-input:focus {
  border-color: #0844a4;
  box-shadow: 0 0 0 1px #0844a4;
}

.bin-input.w-binary {
  width: 170px;
}

.bin-input.w-decimal {
  width: 170px;
}

.bin-select {
  height: 28px;
  padding: 2px 6px;
  font-size: 14px;
  font-weight: bold;
  color: #0f172a;
  background-color: #ffffff;
  border: 1px solid #7f9db9;
  border-radius: 2px;
  cursor: pointer;
  outline: none;
  box-sizing: border-box;
}

.bin-select:focus {
  border-color: #0844a4;
}

.bin-eq-label {
  font-size: 15px;
  font-weight: bold;
  color: #333333;
  margin-left: 2px;
}

/* Action Buttons (Calculate & Clear) */
.bin-btn-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bin-btn-calc {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: #2e7d32;
  color: #ffffff;
  border: none;
  border-radius: 3px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
  transition: background-color 0.15s ease-in-out;
}

.bin-btn-calc:hover {
  background-color: #1b5e20;
}

.bin-btn-calc svg {
  fill: currentColor;
}

.bin-btn-clear {
  display: inline-flex;
  align-items: center;
  background-color: #9e9e9e;
  color: #ffffff;
  border: none;
  border-radius: 3px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s ease-in-out;
}

.bin-btn-clear:hover {
  background-color: #757575;
}

/* Result Card Display (Appears right under calculation card) */
.bin-result-box {
  background-color: #f8fafc;
  border: 1px solid #cbd5e1;
  border-top: none;
  border-radius: 0 0 4px 4px;
  padding: 14px 18px;
  margin-top: -10px;
  margin-bottom: 20px;
}

.bin-result-primary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 8px 12px;
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: 4px;
  margin-bottom: 12px;
}

.bin-result-tag {
  font-size: 11px;
  font-weight: bold;
  text-transform: uppercase;
  color: #065f46;
  letter-spacing: 0.5px;
}

.bin-result-val {
  font-size: 16px;
  font-family: Consolas, Monaco, "Courier New", Courier, monospace;
  font-weight: bold;
  color: #065f46;
}

.bin-result-decimal {
  font-size: 13.5px;
  color: #334155;
  margin-left: auto;
}

/* Equivalent Bases Grid */
.bin-bases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}

.bin-base-chip {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 12px;
}

.bin-base-chip .lbl {
  color: #64748b;
  font-size: 10.5px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 2px;
}

.bin-base-chip .val {
  font-family: Consolas, Monaco, monospace;
  font-weight: 600;
  color: #1e293b;
  word-break: break-all;
}

/* Step-by-Step Breakdown Container */
.bin-steps-box {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: #334155;
}

.bin-steps-title {
  font-weight: bold;
  color: #0844a4;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.bin-steps-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 6px;
  font-size: 12px;
}

.bin-steps-table th,
.bin-steps-table td {
  padding: 4px 8px;
  border: 1px solid #e2e8f0;
  text-align: left;
}

.bin-steps-table th {
  background-color: #f1f5f9;
  color: #475569;
  font-weight: 600;
}

.bin-steps-table td.mono {
  font-family: Consolas, Monaco, monospace;
}

/* Interactive Bit Visualizer & Powers of 2 Chart (Core Requirement 5) */
.bin-visualizer-section {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid #e2e8f0;
}

.bin-register-card {
  background-color: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 20px;
}

.bin-register-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.bin-register-title {
  font-size: 15px;
  font-weight: bold;
  color: #0844a4;
}

.bin-register-bits {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 12px 0;
}

.bin-bit-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  background-color: #ffffff;
  border: 1px solid #94a3b8;
  border-radius: 4px;
  width: 52px;
  padding: 6px 2px;
  cursor: pointer;
  user-select: none;
  transition: all 0.15s ease-in-out;
}

.bin-bit-cell:hover {
  border-color: #0844a4;
  transform: translateY(-1px);
}

.bin-bit-cell.active {
  background-color: #eff6ff;
  border-color: #2563eb;
  box-shadow: 0 0 0 1px #2563eb;
}

.bin-bit-cell .exp {
  font-size: 10px;
  color: #64748b;
  margin-bottom: 4px;
}

.bin-bit-cell .val {
  font-size: 20px;
  font-weight: bold;
  font-family: Consolas, Monaco, monospace;
  color: #94a3b8;
}

.bin-bit-cell.active .val {
  color: #2563eb;
}

.bin-bit-cell .weight {
  font-size: 10.5px;
  font-weight: 600;
  color: #475569;
  margin-top: 4px;
}

.bin-register-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  font-size: 13px;
}

/* Canvas Chart Container */
.bin-chart-container {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 16px;
  margin-bottom: 25px;
}

.bin-chart-canvas {
  width: 100%;
  height: 220px;
  display: block;
}

/* RIGHT SIDEBAR (Matching reference image) */
.bin-search-box {
  display: flex;
  margin-bottom: 16px;
  position: relative;
}

.bin-search-input {
  flex: 1;
  height: 26px;
  padding: 2px 8px;
  font-size: 13px;
  border: 1px solid #7f9db9;
  border-right: none;
  outline: none;
  box-sizing: border-box;
}

.bin-search-input:focus {
  border-color: #2c5f88;
}

.bin-search-btn {
  background-color: #2c5f88;
  color: #ffffff;
  border: 1px solid #2c5f88;
  padding: 0 12px;
  font-size: 12.5px;
  font-weight: bold;
  cursor: pointer;
  height: 26px;
}

.bin-search-btn:hover {
  background-color: #1e4566;
}

/* Search Autocomplete Dropdown */
.bin-search-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: #ffffff;
  border: 1px solid #7f9db9;
  border-top: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  max-height: 280px;
  overflow-y: auto;
  z-index: 1000;
  display: none;
}

.bin-search-item {
  padding: 7px 10px;
  font-size: 12px;
  color: #0844a4;
  cursor: pointer;
  border-bottom: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.bin-search-item:hover {
  background-color: #f0f7ff;
}

/* Math Calculators Sidebar Box */
.bin-sidebar-card {
  border: 1px solid #7f9db9;
  background-color: #ffffff;
  font-size: 12px;
}

.bin-sidebar-header {
  background-color: #2c5f88;
  color: #ffffff;
  font-weight: bold;
  padding: 6px 10px;
  font-size: 13px;
}

.bin-sidebar-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 10px;
  gap: 8px 12px;
}

.bin-sidebar-grid a {
  color: #0844a4;
  text-decoration: underline;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.bin-sidebar-grid a:hover {
  color: #002277;
}

.bin-sidebar-grid .full-span {
  grid-column: span 2;
}

.bin-sidebar-grid .more-link {
  grid-column: span 2;
  margin-top: 4px;
}

.bin-sidebar-footer {
  border-top: 1px solid #d0d0d0;
  padding: 6px 8px;
  font-size: 11.5px;
  color: #555555;
  background-color: #f1f1f1;
  text-align: center;
}

.bin-sidebar-footer a {
  color: #0844a4;
  text-decoration: none;
  margin: 0 2px;
}

.bin-sidebar-footer a:hover {
  text-decoration: underline;
}

.bin-sidebar-footer .active-cat {
  font-weight: bold;
  color: #000000;
}

/* ==========================================================================
   QUICK MODAL: "Binary / Decimal Converter" (Exact Clone of Image 1)
   ========================================================================== */
.bin-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 15px;
}

.bin-modal-card {
  background-color: #ffffff;
  border: 1px solid #0844a4;
  border-radius: 4px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  width: 100%;
  max-width: 460px;
  overflow: hidden;
  animation: binModalIn 0.2s ease-out;
}

@keyframes binModalIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.bin-modal-header {
  background-color: #093b68;
  color: #ffffff;
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  font-weight: bold;
}

.bin-modal-close-btn {
  background: none;
  border: none;
  color: #ffffff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  opacity: 0.85;
}

.bin-modal-close-btn:hover {
  opacity: 1;
}

.bin-modal-body {
  padding: 18px 20px;
  background-color: #ffffff;
}

.bin-modal-field {
  margin-bottom: 14px;
}

.bin-modal-label {
  display: block;
  font-size: 13.5px;
  font-weight: bold;
  color: #1e293b;
  margin-bottom: 5px;
}

.bin-modal-input {
  width: 100%;
  height: 34px;
  padding: 4px 10px;
  font-size: 15px;
  font-family: Consolas, Monaco, "Courier New", Courier, monospace;
  font-weight: 600;
  color: #0f172a;
  background-color: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  box-sizing: border-box;
  outline: none;
}

.bin-modal-input:focus {
  border-color: #0844a4;
  box-shadow: 0 0 0 1px #0844a4;
}

.bin-modal-callout {
  background-color: #f0f7ff;
  border: 1px solid #cce3f8;
  border-radius: 4px;
  padding: 12px 14px;
  color: #004085;
  font-size: 12.5px;
  line-height: 1.45;
  margin-top: 14px;
}

/* ==========================================================================
   SAVED DRAWER & TOAST NOTIFICATION
   ========================================================================== */
.bin-drawer-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 2500;
  display: none;
  justify-content: flex-end;
}

.bin-drawer {
  width: 100%;
  max-width: 380px;
  background-color: #ffffff;
  height: 100%;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
}

.bin-drawer-head {
  padding: 14px 18px;
  background-color: #093b68;
  color: #ffffff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
  font-weight: bold;
}

.bin-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
}

.bin-drawer-empty {
  text-align: center;
  color: #64748b;
  font-size: 13px;
  padding: 40px 10px;
}

.bin-drawer-item {
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 10px;
  margin-bottom: 10px;
  font-size: 12px;
}

.bin-drawer-footer {
  padding: 12px 16px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  gap: 8px;
  background-color: #f8fafc;
}

/* Toast Message */
.bin-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background-color: #1e293b;
  color: #ffffff;
  padding: 9px 18px;
  border-radius: 20px;
  font-size: 12.5px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  z-index: 3000;
  animation: binToastIn 0.2s ease-out;
  pointer-events: none;
}

@keyframes binToastIn {
  from { opacity: 0; transform: translate(-50%, 10px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* ==========================================================================
   SEO, AEO & GEO CONTENT SECTION (500+ Words)
   ========================================================================== */
.bin-seo-article {
  margin-top: 40px;
  padding-top: 25px;
  border-top: 1px solid #e2e8f0;
  font-size: 13.5px;
  line-height: 1.65;
  color: #334155;
}

.bin-seo-article h2 {
  font-size: 20px;
  font-weight: bold;
  color: #0844a4;
  margin: 24px 0 10px 0;
}

.bin-seo-article h3 {
  font-size: 16px;
  font-weight: bold;
  color: #1e293b;
  margin: 18px 0 8px 0;
}

.bin-seo-article p {
  margin: 0 0 12px 0;
}

.bin-seo-article ul,
.bin-seo-article ol {
  margin: 0 0 14px 20px;
  padding: 0;
}

.bin-seo-article li {
  margin-bottom: 6px;
}

.bin-faq-item {
  background-color: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  padding: 12px 16px;
  margin-bottom: 12px;
}

.bin-faq-q {
  font-weight: bold;
  color: #0844a4;
  margin-bottom: 6px;
  font-size: 14px;
}

.bin-faq-a {
  color: #475569;
  margin: 0;
}

/* ==========================================================================
   PRINT STYLES & MEDIA QUERIES
   ========================================================================== */
@media print {
  @page {
    size: letter portrait;
    margin: 12mm 15mm;
  }

  body.bin-printing-modal .site-header,
  body.bin-printing-modal .site-footer,
  body.bin-printing-modal .bin-page-wrapper,
  body.bin-printing-modal .bin-drawer-backdrop,
  body.bin-printing-modal #bin-quick-modal,
  body.bin-printing-modal .bin-modal-header,
  body.bin-printing-modal .bin-modal-footer,
  body.bin-printing-modal .bin-modal-close-btn {
    display: none !important;
  }

  body.bin-printing-modal #bin-print-modal {
    position: static !important;
    display: block !important;
    background: transparent !important;
    padding: 0 !important;
  }

  body.bin-printing-modal .bin-modal-card {
    box-shadow: none !important;
    border: none !important;
    max-width: 100% !important;
    overflow: visible !important;
  }

  /* Fallback Ctrl+P */
  body:not(.bin-printing-modal) .site-header,
  body:not(.bin-printing-modal) .site-footer,
  body:not(.bin-printing-modal) .bin-sidebar-column,
  body:not(.bin-printing-modal) .bin-top-toolbar,
  body:not(.bin-printing-modal) .bin-btn-row,
  body:not(.bin-printing-modal) .bin-modal-backdrop,
  body:not(.bin-printing-modal) .bin-drawer-backdrop {
    display: none !important;
  }
}

/* Responsive Breakpoints */
@media (max-width: 820px) {
  .bin-layout-row {
    flex-direction: column;
    gap: 25px;
  }

  .bin-sidebar-column {
    width: 100%;
  }

  .bin-input.w-binary,
  .bin-input.w-decimal {
    width: 140px;
  }
}

@media (max-width: 480px) {
  .bin-input-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .bin-input.w-binary,
  .bin-input.w-decimal {
    width: 100%;
  }

  .bin-bit-cell {
    width: 38px;
    padding: 4px 1px;
  }

  .bin-bit-cell .val {
    font-size: 16px;
  }
}

/* RTL Support for Arabic */
html[dir="rtl"] .bin-page-wrapper {
  text-align: right;
}

html[dir="rtl"] .bin-breadcrumbs {
  direction: rtl;
}

html[dir="rtl"] .bin-search-input {
  border-left: none;
  border-right: 1px solid #7f9db9;
}

html[dir="rtl"] .bin-btn-calc svg {
  transform: rotate(180deg);
}

html[dir="rtl"] .bin-bit-cell .exp {
  direction: ltr;
}