/* ==========================================================================
   PROMEDIC NOTES - CLINICAL INTELLIGENCE UI SYSTEM
   Dual Saturated Themes (Vibrant Dark Neon & Saturated Clinical Light)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Cairo:wght@400;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Default: Vibrant Dark Neon Clinical */
  --bg-main: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #162036;
  --bg-surface-glass: rgba(15, 23, 42, 0.85);
  --bg-sidebar: #0b1120;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(6, 182, 212, 0.5);
  --border-glow: rgba(14, 165, 233, 0.3);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #090d16;
  
  /* Saturated Clinical Accents */
  --primary: #06b6d4;          /* Cyan 500 */
  --primary-hover: #22d3ee;    /* Cyan 400 */
  --primary-glow: rgba(6, 182, 212, 0.25);
  --primary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  
  --accent-emerald: #10b981;    /* Emerald 500 */
  --accent-emerald-glow: rgba(16, 185, 129, 0.2);
  --accent-violet: #8b5cf6;     /* Violet 500 */
  --accent-violet-glow: rgba(139, 92, 246, 0.2);
  --accent-amber: #f59e0b;      /* Amber 500 */
  --accent-amber-glow: rgba(245, 158, 11, 0.2);
  --accent-rose: #f43f5e;       /* Rose 500 */
  --accent-rose-glow: rgba(244, 63, 94, 0.25);
  
  --card-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5), 0 0 1px 1px rgba(255, 255, 255, 0.05);
  --card-hover-shadow: 0 20px 40px -10px rgba(6, 182, 212, 0.25), 0 0 2px 1px rgba(6, 182, 212, 0.4);
  
  --code-bg: #050811;
  --table-stripe: rgba(255, 255, 255, 0.02);
  --table-hover: rgba(6, 182, 212, 0.08);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --sidebar-width: 310px;
  --header-height: 72px;
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  /* Saturated Daylight Medical Theme */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-glass: rgba(255, 255, 255, 0.9);
  --bg-sidebar: #ffffff;
  
  --border-subtle: #e2e8f0;
  --border-focus: #0284c7;
  --border-glow: rgba(2, 132, 199, 0.2);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --primary: #0284c7;          /* Sky 600 */
  --primary-hover: #0369a1;    /* Sky 700 */
  --primary-glow: rgba(2, 132, 199, 0.18);
  --primary-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
  
  --accent-emerald: #059669;
  --accent-emerald-glow: rgba(5, 150, 105, 0.15);
  --accent-violet: #7c3aed;
  --accent-violet-glow: rgba(124, 58, 237, 0.15);
  --accent-amber: #d97706;
  --accent-amber-glow: rgba(217, 119, 6, 0.15);
  --accent-rose: #e11d48;
  --accent-rose-glow: rgba(225, 29, 72, 0.15);
  
  --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 0 0 1px #e2e8f0;
  --card-hover-shadow: 0 14px 30px -4px rgba(2, 132, 199, 0.18), 0 0 0 1.5px #0284c7;
  
  --code-bg: #e2e8f0;
  --table-stripe: #f8fafc;
  --table-hover: rgba(2, 132, 199, 0.06);
}

/* Base Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* Arabic Typography Support */
.font-ar {
  font-family: 'Cairo', 'Plus Jakarta Sans', sans-serif;
  direction: rtl;
  text-align: right;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

/* Header & Top Navigation */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent-emerald);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.nav-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.95rem;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.nav-link-btn:hover {
  color: var(--primary);
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--border-focus);
}

.nav-link-btn.active {
  color: #fff;
  background: var(--primary-gradient);
  box-shadow: 0 4px 14px var(--primary-glow);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.86rem;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.4rem;
}

/* Layout System */
.app-layout {
  display: flex;
  min-height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
}

/* Sidebar Navigation */
.app-sidebar {
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  position: fixed;
  top: var(--header-height);
  bottom: 0;
  left: 0;
  overflow-y: auto;
  padding: 1.5rem 1rem 3rem 1rem;
  z-index: 900;
  transition: transform var(--transition-normal), background-color var(--transition-normal);
}

.sidebar-search-box {
  position: relative;
  margin-bottom: 1.25rem;
}

.sidebar-search-input {
  width: 100%;
  padding: 0.65rem 0.85rem 0.65rem 2.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: all var(--transition-fast);
}

.sidebar-search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.sidebar-group {
  margin-bottom: 1.5rem;
}

.sidebar-group-title {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0 0.65rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-nav-list {
  list-style: none;
}

.sidebar-nav-item {
  margin-bottom: 0.2rem;
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  border-left-color: var(--primary);
}

.sidebar-nav-link.active {
  color: var(--primary);
  background: var(--primary-glow);
  font-weight: 700;
  border-left-color: var(--primary);
}

.sidebar-icon {
  font-size: 1rem;
  opacity: 0.85;
}

/* Main Content Area */
.app-main {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 2.5rem 3rem 5rem 3rem;
  max-width: 1440px;
}

.app-main.no-sidebar {
  margin-left: 0;
  max-width: 1300px;
  margin-right: auto;
}

/* Hero Section */
.hero-banner {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.12) 0%, rgba(59, 130, 246, 0.08) 50%, rgba(139, 92, 246, 0.1) 100%), var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--primary-glow);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-full);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 850px;
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.65rem;
  background: var(--primary-gradient);
  color: #fff;
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 18px var(--primary-glow);
  transition: all var(--transition-normal);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.65rem;
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  background: var(--bg-surface);
}

/* Feature Hub Cards Grid */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 1.75rem;
  margin-bottom: 3rem;
}

.hub-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.hub-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--card-hover-shadow);
}

.hub-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--card-accent, var(--primary-gradient));
}

.hub-icon-wrapper {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
  background: var(--icon-bg, var(--primary-glow));
  color: var(--icon-color, var(--primary));
}

.hub-card-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
}

.hub-card-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1.5rem;
  flex: 1;
}

.hub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.hub-tag {
  padding: 0.25rem 0.65rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Medical Box Containers */
.med-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition-fast);
  position: relative;
}

.med-box:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.med-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.med-box-title {
  font-size: 1.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-primary);
}

/* Specialized Clinical Alerts */
.clinical-alert {
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.25rem 0;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border-left: 4px solid;
}

.alert-danger {
  background: rgba(244, 63, 94, 0.1);
  border-color: var(--accent-rose);
  color: var(--text-primary);
}
.alert-danger .alert-icon { color: var(--accent-rose); }

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--accent-amber);
  color: var(--text-primary);
}
.alert-warning .alert-icon { color: var(--accent-amber); }

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--accent-emerald);
  color: var(--text-primary);
}
.alert-success .alert-icon { color: var(--accent-emerald); }

.alert-info {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--primary);
  color: var(--text-primary);
}
.alert-info .alert-icon { color: var(--primary); }

.alert-icon {
  font-size: 1.35rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.alert-content h4 {
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.alert-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Saturated Badges & Pills */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-cyan { background: var(--primary-glow); color: var(--primary); border: 1px solid var(--border-focus); }
.badge-emerald { background: var(--accent-emerald-glow); color: var(--accent-emerald); border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-violet { background: var(--accent-violet-glow); color: var(--accent-violet); border: 1px solid rgba(139, 92, 246, 0.3); }
.badge-amber { background: var(--accent-amber-glow); color: var(--accent-amber); border: 1px solid rgba(245, 158, 11, 0.3); }
.badge-rose { background: var(--accent-rose-glow); color: var(--accent-rose); border: 1px solid rgba(244, 63, 94, 0.3); }

/* Tables System */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 1.25rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface);
}

.med-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.med-table th {
  background: var(--bg-surface-elevated);
  padding: 0.9rem 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--border-subtle);
  position: sticky;
  top: 0;
  white-space: nowrap;
}

.med-table td {
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  vertical-align: top;
}

.med-table tr:nth-child(even) td {
  background: var(--table-stripe);
}

.med-table tr:hover td {
  background: var(--table-hover);
  color: var(--text-primary);
}

.med-table td strong {
  color: var(--text-primary);
}

/* Collapsible Deep-Dive Cards */
.collapsible-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  background: var(--bg-surface);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.collapsible-header {
  padding: 1.1rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  background: var(--bg-surface);
  transition: background-color var(--transition-fast);
}

.collapsible-header:hover {
  background: var(--bg-surface-elevated);
}

.collapsible-header-title {
  font-weight: 700;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text-primary);
}

.collapsible-icon {
  font-size: 0.9rem;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.collapsible-card.open .collapsible-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.collapsible-content {
  display: none;
  padding: 1.35rem;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
}

.collapsible-card.open .collapsible-content {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Interactive Dosing / Drug Copy Buttons */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-glow);
}

.copy-btn.copied {
  background: var(--accent-emerald-glow);
  color: var(--accent-emerald);
  border-color: var(--accent-emerald);
}

/* Interactive Calculator Box */
.calc-card {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.04)), var(--bg-surface);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: var(--card-shadow);
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.calc-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.calc-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.calc-input {
  padding: 0.7rem 0.9rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.calc-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.calc-result-box {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calc-result-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

/* Page Section Headers */
.section-anchor {
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
}

.section-header {
  margin: 3rem 0 1.5rem 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-title-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--primary-glow);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

/* Step Pipeline Flow */
.flow-pipeline {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 1.5rem 0;
}

.flow-step {
  display: flex;
  gap: 1.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  position: relative;
}

.flow-step-num {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.flow-step-body h4 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.flow-step-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Comparison Cards Grid */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin: 1.5rem 0;
}

.compare-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  position: relative;
}

.compare-card.highlight-emerald {
  border-color: rgba(16, 185, 129, 0.4);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.05) 0%, var(--bg-surface) 100%);
}

.compare-card.highlight-violet {
  border-color: rgba(139, 92, 246, 0.4);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.05) 0%, var(--bg-surface) 100%);
}

/* Key Metrics Box */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.metric-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

.metric-value {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--primary);
  margin: 0.25rem 0;
}

.metric-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Footer */
.app-footer {
  margin-top: 4rem;
  padding: 2.5rem 0 1rem 0;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .app-sidebar {
    transform: translateX(-100%);
    box-shadow: 20px 0 40px rgba(0, 0, 0, 0.5);
  }
  
  .app-sidebar.open {
    transform: translateX(0);
  }
  
  .app-main {
    margin-left: 0;
    padding: 1.5rem;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-title {
    font-size: 2rem;
  }
}

@media (max-width: 640px) {
  .header-nav .nav-link-btn span {
    display: none;
  }
  
  .hero-banner {
    padding: 1.75rem 1.25rem;
  }
  
  .hero-title {
    font-size: 1.65rem;
  }
  
  .hub-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   BILINGUAL & RTL LANGUAGE SYSTEM (ARABIC / ENGLISH FULL SHOW)
   ========================================================================== */

/* Toggle Button */
.lang-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-full);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.lang-toggle-btn:hover {
  background: var(--primary-glow);
  border-color: var(--primary);
  color: var(--primary-hover);
  box-shadow: 0 0 15px var(--primary-glow);
  transform: translateY(-1px);
}

/* Visibility Rules: Default (English) vs Arabic */
:root:not([lang="ar"]) .lang-ar,
html[lang="en"] .lang-ar {
  display: none !important;
}

html[lang="ar"] .lang-en {
  display: none !important;
}

/* Specific display modes for Arabic */
html[lang="ar"] div.lang-ar,
html[lang="ar"] p.lang-ar,
html[lang="ar"] section.lang-ar,
html[lang="ar"] ul.lang-ar,
html[lang="ar"] ol.lang-ar {
  display: block !important;
}

html[lang="ar"] span.lang-ar {
  display: inline !important;
}

html[lang="ar"] .custom-table.lang-ar,
html[lang="ar"] table.lang-ar {
  display: table !important;
}

/* RTL Layout Enhancements */
html[lang="ar"] {
  direction: rtl;
  text-align: right;
  font-family: 'Cairo', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

html[lang="ar"] .app-sidebar {
  border-right: none;
  border-left: 1px solid var(--border-subtle);
}

html[lang="ar"] .sidebar-nav-link {
  text-align: right;
}

html[lang="ar"] .sidebar-icon,
html[lang="ar"] .sidebar-nav-icon {
  margin-right: 0;
  margin-left: 0.75rem;
}

html[lang="ar"] .header-nav {
  margin-left: 0;
  margin-right: auto;
}

html[lang="ar"] .clinical-alert {
  border-left: none;
  border-right: 4px solid currentColor;
}

html[lang="ar"] .alert-info { border-right-color: var(--primary); }
html[lang="ar"] .alert-warning { border-right-color: var(--accent-amber); }
html[lang="ar"] .alert-danger { border-right-color: var(--accent-rose); }
html[lang="ar"] .alert-success { border-right-color: var(--accent-emerald); }

html[lang="ar"] .formula-box {
  border-left: none;
  border-right: 4px solid var(--primary);
}

html[lang="ar"] .card-box {
  border-left: none;
  border-right: 4px solid var(--primary);
}

html[lang="ar"] .custom-table th,
html[lang="ar"] .custom-table td {
  text-align: right;
}

html[lang="ar"] .breadcrumb-separator {
  transform: scaleX(-1);
  display: inline-block;
}

html[lang="ar"] .hero-buttons {
  justify-content: flex-start;
}