/* ==========================================================================
   OmniCalc: Modern, Lightweight & High-Performance Design System (Website)
   ========================================================================== */

/* --- CSS Theme Variables --- */
:root[data-theme="dark"] {
  --bg-app: #0b0f19;
  --bg-sidebar: #0f172a;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent: #3b82f6;
  --accent-rgb: 59, 130, 246;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.15);
  
  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  
  --bg-input: #020617;
  --text-input: #f8fafc;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.15);
  --glass-blur: blur(12px);
  --card-glow: rgba(59, 130, 246, 0.03);
}

:root[data-theme="light"] {
  --bg-app: #f1f5f9;
  --bg-sidebar: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.8);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: #2563eb;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent: #2563eb;
  --accent-rgb: 37, 99, 235;
  --accent-hover: #1d4ed8;
  --accent-light: rgba(37, 99, 235, 0.08);
  
  --success: #059669;
  --success-light: rgba(5, 150, 105, 0.1);
  --danger: #dc2626;
  --danger-light: rgba(220, 38, 38, 0.1);
  --warning: #d97706;
  --warning-light: rgba(217, 119, 6, 0.1);
  
  --bg-input: #ffffff;
  --text-input: #0f172a;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --glass-blur: blur(8px);
  --card-glow: rgba(0, 0, 0, 0.01);
}

/* --- Global Reset & Setup --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* --- Layout Wrappers --- */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- Header Area --- */
.site-header {
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  height: 75px;
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.logo-icon {
  color: var(--accent);
  transition: transform 0.3s ease;
}

.logo-area:hover .logo-icon {
  transform: rotate(90deg);
}

.logo-text {
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
}

/* --- Search Bar --- */
.search-container {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin: 0 20px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  transition: color 0.2s ease;
}

#calc-search {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 10px 40px 10px 44px;
  color: var(--text-input);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}

#calc-search:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}

#calc-search:focus + .search-icon {
  color: var(--accent);
}

#search-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

#search-clear:hover {
  color: var(--text-primary);
}

/* --- Icon Buttons --- */
.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.icon-btn:hover {
  background-color: var(--accent-light);
  color: var(--text-primary);
}

.theme-toggle-btn .sun-icon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle-btn .sun-icon {
  display: block;
}

:root[data-theme="dark"] .theme-toggle-btn .moon-icon {
  display: none;
}

:root[data-theme="light"] .theme-toggle-btn .moon-icon {
  display: block;
}

/* --- Main Layout Grid --- */
.site-content {
  flex-grow: 1;
}

.site-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding: 32px 0;
}


.category-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
  align-items: center;
  backdrop-filter: var(--glass-blur);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.category-bar .nav-item {
  width: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  transform: none !important;
}

.category-bar .nav-item:hover {
  background-color: var(--accent-light);
  color: var(--accent);
}

.category-bar .nav-item.active {
  background-color: var(--accent);
  color: #ffffff;
}

/* --- Header Category Bar Integration --- */
.site-header .category-bar {
  margin-bottom: 0;
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 12px;
  box-shadow: none;
  display: flex;
  align-items: center;
  gap: 8px;
  backdrop-filter: none;
  animation: fadeIn 0.4s ease;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-header .category-bar .nav-item {
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  gap: 6px;
}

@media (max-width: 1024px) {
  .site-header .category-bar {
    gap: 4px;
    padding: 3px;
  }
  .site-header .category-bar .nav-item {
    padding: 5px 10px;
    font-size: 13px;
    gap: 4px;
  }
  .site-header .category-bar .nav-item svg {
    width: 15px;
    height: 15px;
  }
}

@media (max-width: 768px) {
  .site-header .category-bar {
    display: none;
  }
}

/* --- Sidebar --- */
.app-sidebar {
  display: none;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px 16px;
  position: sticky;
  top: 100px;
  height: auto;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.sidebar-nav {
  margin-bottom: 8px;
}

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-item:hover {
  background-color: var(--accent-light);
  color: var(--text-primary);
  transform: translateX(3px);
}

.nav-item.active {
  background-color: var(--accent);
  color: #ffffff;
}

.nav-item.active:hover {
  transform: none;
}

/* Hide diagnostics button from sidebar on desktop since it is in the footer */
.app-sidebar .sidebar-footer {
  display: none;
}

/* --- Buttons --- */
.primary-btn, .secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  text-decoration: none;
}

.primary-btn {
  background-color: var(--accent);
  color: #ffffff;
}

.primary-btn:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.primary-btn:active {
  transform: translateY(0);
}

.secondary-btn {
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid transparent;
}

.secondary-btn:hover {
  background-color: var(--accent);
  color: #ffffff;
}

.w-full {
  width: 100%;
}

.text-center {
  text-align: center;
}

/* --- Main Workspace Content --- */
.app-main {
  min-width: 0; /* Prevents overflow in flex/grid items */
}

/* --- Breadcrumbs --- */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  animation: fadeIn 0.3s ease;
}

.breadcrumbs a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.breadcrumbs .separator {
  user-select: none;
}

.breadcrumbs .category {
  text-transform: capitalize;
}

.breadcrumbs .active {
  color: var(--text-primary);
  font-weight: 500;
}

.hidden {
  display: none !important;
}

/* --- Dashboard Hero --- */
.dashboard-hero {
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.08), rgba(var(--accent-rgb), 0.02));
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.dashboard-hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(var(--accent-rgb), 0.03) 0%, transparent 70%);
  pointer-events: none;
}

.dashboard-hero h1 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
  letter-spacing: -0.04em;
}

.dashboard-hero p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.category-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.category-section-title h2 {
  font-size: 22px;
  color: var(--text-primary);
}

.count-badge {
  background-color: var(--accent-light);
  color: var(--accent);
  font-family: 'Outfit', sans-serif;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 30px;
}

/* --- Calculator Grid --- */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 16px;
}

.calc-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: var(--glass-blur);
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1), 
              border-color 0.25s ease, 
              box-shadow 0.25s ease, 
              background-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.calc-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), var(--card-glow), transparent 40%);
  pointer-events: none;
}

.calc-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-focus);
  box-shadow: var(--shadow-lg);
  background-color: var(--bg-card-hover);
}

.calc-icon {
  background-color: var(--accent-light);
  color: var(--accent);
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.calc-card:hover .calc-icon {
  transform: scale(1.1) rotate(-5deg);
}

.calc-card h3 {
  font-size: 18px;
  color: var(--text-primary);
}

.calc-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.4;
  flex-grow: 1;
}

.calc-card-footer {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.2s ease;
}

.calc-card:hover .calc-card-footer {
  gap: 10px;
}

/* --- Active Calculator Layout --- */
.view-panel {
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.calculator-header {
  margin-bottom: 24px;
}

.back-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  margin-bottom: 16px;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.back-btn:hover {
  background-color: var(--accent-light);
  color: var(--accent);
  transform: translateX(-4px);
}

.calculator-title-area {
  display: flex;
  align-items: center;
  gap: 20px;
}

.calc-title-icon {
  background-color: var(--accent-light);
  color: var(--accent);
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.calculator-title-area h1 {
  font-size: 28px;
  color: var(--text-primary);
}

.calculator-title-area p {
  color: var(--text-secondary);
  font-size: 15px;
}

.calculator-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.workspace-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-md);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.workspace-card .card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.workspace-card .card-header h2 {
  font-size: 18px;
  color: var(--text-primary);
}

/* --- Input Forms --- */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.input-container {
  position: relative;
  display: flex;
  align-items: center;
}

.input-prefix, .input-suffix {
  position: absolute;
  color: var(--text-muted);
  font-size: 14px;
  user-select: none;
  font-weight: 500;
}

.input-prefix {
  left: 14px;
}

.input-suffix {
  right: 14px;
}

.form-input {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text-input);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.3s ease;
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.has-prefix {
  padding-left: 28px;
}

.has-suffix {
  padding-right: 42px;
}

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

/* --- Sliders --- */
.slider-group {
  margin-top: 8px;
}

.slider-container {
  display: flex;
  align-items: center;
  gap: 12px;
}

.form-slider {
  flex-grow: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background-color: var(--border-color);
  outline: none;
  cursor: pointer;
}

.form-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--accent);
  transition: transform 0.1s ease;
}

.form-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.slider-value-display {
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 40px;
  text-align: right;
}

/* --- Toggle Buttons --- */
.tab-group {
  display: flex;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 20px;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
}

.tab-btn.active {
  background-color: var(--accent);
  color: #ffffff;
}

.form-select {
  width: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text-input);
  font-family: inherit;
  font-size: 15px;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  transition: border-color 0.2s ease, background-color 0.3s ease;
}

.form-select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* --- Results / Outputs Display --- */
.results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  text-align: center;
  padding: 60px 20px;
  gap: 16px;
}

.results-placeholder p {
  font-size: 14px;
  max-width: 240px;
}

.results-container {
  animation: fadeIn 0.3s ease;
}

.result-card {
  background: linear-gradient(135deg, rgba(var(--accent-rgb), 0.08), rgba(var(--accent-rgb), 0.02));
  border: 1px solid var(--accent-light);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  text-align: center;
}

.result-card .value-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.result-card .main-value {
  font-family: 'Outfit', sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: var(--accent);
}

.result-grid-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.metric-box {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}

.metric-box .label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
  display: block;
}

.metric-box .val {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.result-section-header {
  font-size: 15px;
  color: var(--text-primary);
  margin: 20px 0 12px 0;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  font-weight: 600;
}

/* --- SVG Pie Chart --- */
.chart-box {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 20px auto;
  position: relative;
  width: 180px;
  height: 180px;
}

.pie-chart {
  transform: rotate(-90deg);
}

.pie-segment {
  fill: none;
  stroke-width: 38;
  transition: stroke-dasharray 0.3s ease;
}

.chart-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}

/* --- Data Tables --- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin-top: 10px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.data-table th, .data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  background-color: var(--bg-input);
  font-family: 'Outfit', sans-serif;
  color: var(--text-secondary);
  font-weight: 600;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background-color: rgba(var(--accent-rgb), 0.03);
}

/* --- Scientific Calculator Keyboard --- */
.sci-calc-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sci-display {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  text-align: right;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  word-break: break-all;
}

.sci-expression {
  font-size: 15px;
  color: var(--text-secondary);
  min-height: 22px;
}

.sci-result {
  font-family: 'Outfit', sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 4px;
}

.sci-keyboard {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.sci-btn {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 12px 6px;
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.sci-btn:hover {
  background-color: var(--accent-light);
  border-color: var(--border-focus);
  color: var(--accent);
}

.sci-btn:active {
  transform: scale(0.95);
}

.sci-btn.btn-operator {
  color: var(--accent);
  background-color: rgba(var(--accent-rgb), 0.05);
}

.sci-btn.btn-action {
  color: var(--danger);
  background-color: var(--danger-light);
  border-color: rgba(239, 68, 68, 0.15);
}

.sci-btn.btn-action:hover {
  background-color: var(--danger);
  color: #ffffff;
}

.sci-btn.btn-equal {
  color: #ffffff;
  background-color: var(--accent);
  grid-column: span 2;
}

.sci-btn.btn-equal:hover {
  background-color: var(--accent-hover);
  color: #ffffff;
}

.sci-modes {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-bottom: 8px;
}

/* --- BMI Custom Gauge Scale --- */
.bmi-scale-container {
  margin-top: 24px;
}

.bmi-scale-bar {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(to right, #3b82f6 0%, #10b981 30%, #f59e0b 65%, #ef4444 100%);
  position: relative;
  margin: 16px 0 8px 0;
}

.bmi-scale-pointer {
  width: 16px;
  height: 16px;
  background-color: var(--text-primary);
  border: 2px solid var(--bg-card);
  border-radius: 50%;
  position: absolute;
  top: -2px;
  transform: translateX(-50%);
  transition: left 0.5s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.bmi-scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-muted);
}

.bmi-feedback {
  font-size: 14px;
  font-weight: 500;
  margin-top: 12px;
}

.bmi-underweight { color: #3b82f6; }
.bmi-normal { color: #10b981; }
.bmi-overweight { color: #f59e0b; }
.bmi-obese { color: #ef4444; }

/* --- Calorie Macro Distribution --- */
.macro-distribution {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.macro-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.macro-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.macro-bar-outer {
  height: 8px;
  background-color: var(--bg-input);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
  flex-grow: 1;
  width: 100%;
}

.macro-bar-inner {
  height: 100%;
  border-radius: 4px;
}

.macro-carbs { background-color: var(--accent); }
.macro-protein { background-color: var(--success); }
.macro-fats { background-color: var(--warning); }

/* --- Global Footer Section --- */
.site-footer {
  background-color: var(--bg-sidebar);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 32px 0;
  margin-top: 48px;
  color: var(--text-secondary);
  font-size: 14px;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-container {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand .logo-text {
  font-size: 20px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-family: 'Outfit', sans-serif;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 13.5px;
}

/* --- Logic Diagnostics Test Modal --- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease;
}

.modal-card {
  background-color: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideInUp 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 18px;
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  max-height: 400px;
}

.modal-desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.diagnostic-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.summary-metric {
  background-color: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}

.summary-metric .label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 4px;
}

.summary-metric .value {
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.text-success .value { color: var(--success); }
.text-danger .value { color: var(--danger); }

.diagnostic-logs {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  line-height: 1.6;
  max-height: 220px;
  overflow-y: auto;
  white-space: pre-wrap;
  color: var(--text-secondary);
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.log-success { color: var(--success); }
.log-error { color: var(--danger); font-weight: bold; }
.log-header { color: var(--accent); font-weight: bold; }

/* --- Helper Utilities --- */
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.theme-transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-app);
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.theme-transitioning .theme-transition-overlay {
  opacity: 1;
}

/* ==========================================================================
   Responsive Styling (Media Queries)
   ========================================================================== */

.mobile-only {
  display: none !important;
}

@media (max-width: 768px) {
  .mobile-only {
    display: flex !important;
  }

  .site-layout {
    grid-template-columns: 1fr;
    padding: 24px 0;
  }

  .app-sidebar {
    display: block;
    position: fixed;
    top: 0;
    left: -280px;
    width: 260px;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
    z-index: 200;
  }

  .app-sidebar.open {
    transform: translateX(280px);
  }

  .sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
  }

  .sidebar-title {
    font-family: 'Outfit', sans-serif;
    font-size: 18px;
    font-weight: 700;
  }

  .sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }

  .sidebar-overlay.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .search-container {
    margin: 0 10px;
  }

  .dashboard-hero {
    padding: 24px;
  }

  .dashboard-hero h1 {
    font-size: 28px;
  }

  .calculator-title-area h1 {
    font-size: 22px;
  }
}

@media (max-width: 900px) {
  .calculator-workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  #calc-search {
    padding-left: 38px;
    font-size: 13px;
  }
  .search-icon {
    left: 12px;
    width: 16px;
    height: 16px;
  }
  
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .sci-keyboard {
    gap: 6px;
  }
  
  .sci-btn {
    padding: 10px 4px;
    font-size: 14px;
  }
}

/* ==========================================================================
   Finance Calculator: Input Group Sections
   ========================================================================== */

.input-group-section {
  margin-bottom: 4px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  overflow: hidden;
}

.input-group-section + .input-group-section {
  margin-top: 12px;
}

.input-group-header {
  background: linear-gradient(135deg, rgba(59,130,246,0.85) 0%, rgba(99,102,241,0.85) 100%);
  color: #fff;
  padding: 10px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: var(--glass-blur);
}

.input-group-section .form-row {
  padding: 12px 12px 4px;
}

.input-group-section .form-row:last-child {
  padding-bottom: 12px;
}

[data-theme="light"] .input-group-header {
  background: linear-gradient(135deg, rgba(37,99,235,0.9) 0%, rgba(79,70,229,0.9) 100%);
}