/* ==========================================
   CSS VARIABLES & DESIGN SYSTEM (Premium Theme)
   ========================================== */
:root {
  /* Color Palette - Vibrant Indigo and Modern Teal */
  --primary-color: #4f46e5;       /* Premium Indigo */
  --primary-hover: #4338ca;
  --secondary-color: #0f766e;     /* Deep Teal */
  --secondary-hover: #115e59;
  --background-color: #f8fafc;    /* Very soft slate background */
  --card-background: #ffffff;
  --text-color: #0f172a;          /* Dark slate */
  --text-muted: #64748b;          /* Cool grey */
  --border-color: #e2e8f0;        /* Light border */
  --success-color: #10b981;       /* Modern emerald */
  --warning-color: #f59e0b;       /* Soft amber */
  --error-color: #ef4444;         /* Vibrant rose/red */
  
  /* Sidebar Premium Light Mode Colors */
  --sidebar-background: #ffffff;
  --sidebar-border: #e2e8f0;
  --sidebar-text: #475569;
  --sidebar-text-muted: #64748b;
  --sidebar-link-hover: #f1f5f9;
  --sidebar-active-bg: #4f46e5;
  --sidebar-active-text: #ffffff;
  --sidebar-logo-text: #4f46e5;
  
  /* Elevational Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 20px 40px -10px rgba(15, 23, 42, 0.08), 0 10px 20px -8px rgba(15, 23, 42, 0.04);
  
  /* Border radius and transitions */
  --border-radius-sm: 8px;
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ==========================================
   DARK MODE OVERRIDES (Smooth transitions)
   ========================================== */
[data-theme="dark"] {
  --background-color: #090d16;
  --card-background: #111827;
  --text-color: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #1f2937;
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.5);

  /* Sidebar Premium Dark Mode Colors */
  --sidebar-background: #0f172a;
  --sidebar-border: rgba(255, 255, 255, 0.05);
  --sidebar-text: #94a3b8;
  --sidebar-text-muted: #64748b;
  --sidebar-link-hover: #1e293b;
  --sidebar-active-bg: #4f46e5;
  --sidebar-active-text: #ffffff;
  --sidebar-logo-text: #ffffff;
}

/* ==========================================
   BASE RESET & TYPOGRAPHY
   ========================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-hover);
}

/* ==========================================
   LAYOUT STRUCTURE (Sidebar & Main content)
   ========================================== */
.app-container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background-color: var(--sidebar-background);
  border-right: 1px solid var(--sidebar-border);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 100;
  transition: all var(--transition-normal);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--sidebar-text-muted) transparent;
}

/* Custom scrollbar styling for webkit browser engines */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--sidebar-border);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--sidebar-text-muted);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 40px;
  padding: 0 8px;
}

.logo-img {
  max-height: 40px;
  border-radius: 8px;
}

.logo-text {
  font-size: 1rem;
  font-weight: 800;
  color: var(--sidebar-logo-text);
  letter-spacing: -0.01em;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  line-height: 1.4;
}

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

.nav-links li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 12px;
  color: var(--sidebar-text);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.nav-links li a svg {
  stroke: var(--sidebar-text-muted);
  width: 20px;
  height: 20px;
  transition: stroke var(--transition-fast);
}

.nav-links li a:hover {
  color: var(--sidebar-active-bg);
  background-color: var(--sidebar-link-hover);
}

.nav-links li a:hover svg {
  stroke: var(--sidebar-active-bg);
}

.nav-links li.active a {
  background-color: var(--sidebar-active-bg);
  color: var(--sidebar-active-text);
}

.nav-links li.active a svg {
  stroke: var(--sidebar-active-text);
}

.nav-links li.active a svg {
  stroke: #ffffff;
}

.main-content {
  flex: 1;
  padding: 40px;
  overflow-y: auto;
}

/* ==========================================
   CARDS & DASHBOARD TILES
   ========================================== */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.card {
  background-color: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 12px;
}

.card-value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-color);
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================
   BUTTONS STYLING
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 12px -2px rgba(79, 70, 229, 0.25);
}

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

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 12px -2px rgba(15, 118, 110, 0.25);
}

.btn-outline {
  background-color: transparent;
  border: 1.5px solid var(--border-color);
  color: var(--text-color);
}

.btn-outline:hover {
  background-color: var(--border-color);
}

.btn-danger {
  background-color: var(--error-color);
  color: #ffffff;
}

.btn-danger:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ==========================================
   FORM CONTROLS
   ========================================== */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-color);
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--border-color);
  border-radius: 12px;
  background-color: var(--card-background);
  color: var(--text-color);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

/* ==========================================
   TABLES DESIGN (Premium & Scrollable)
   ========================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--card-background);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 650px;
}

th {
  background-color: rgba(79, 70, 229, 0.03);
  color: var(--primary-color);
  font-weight: 700;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-color);
  font-size: 0.9rem;
}

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

tr:hover td {
  background-color: rgba(79, 70, 229, 0.01);
}

/* ==========================================
   BADGES (Smooth modern look)
   ========================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
}

.badge-info {
  background-color: rgba(79, 70, 229, 0.1);
  color: var(--primary-color);
}

/* ==========================================
   WIZARD STEPS FOR PROGRESSIVE DISCLOSURE
   ========================================== */
.wizard-steps {
  display: flex;
  justify-content: space-between;
  margin-bottom: 40px;
  position: relative;
}

.wizard-steps::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--border-color);
  z-index: 1;
  transform: translateY(-50%);
}

.step-item {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--card-background);
  border: 3px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-muted);
  position: relative;
  z-index: 2;
  transition: all var(--transition-normal);
}

.step-item.active {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  color: #ffffff;
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

.step-item.completed {
  border-color: var(--success-color);
  background-color: var(--success-color);
  color: #ffffff;
}

/* ==========================================
   ALERTS / NOTIFICATION TOASTS
   ========================================== */
.alert {
  padding: 18px 24px;
  border-radius: var(--border-radius);
  margin-bottom: 28px;
  border: 1.5px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.15);
  color: #065f46;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.15);
  color: #991b1b;
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.15);
  color: #92400e;
}

/* ==========================================
   CUSTOM FILE UPLOADS
   ========================================== */
.custom-file-upload {
  width: 100%;
  margin-top: 6px;
}

.file-upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2.5px dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: 32px;
  background-color: rgba(79, 70, 229, 0.01);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  gap: 10px;
}

.file-upload-label:hover {
  border-color: var(--primary-color);
  background-color: rgba(79, 70, 229, 0.04);
}

.file-upload-label span {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-color);
}

.file-upload-label .file-name-preview {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
}

/* ==========================================
   FACEBOOK-STYLE FEED CARD LAYOUT
   ========================================== */
.feed-publisher {
  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.feed-publisher-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.feed-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--border-color);
}

.feed-publisher-input {
  flex: 1;
  background-color: rgba(79, 70, 229, 0.02);
  border-radius: 24px;
  padding: 12px 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  border: 1.5px solid var(--border-color);
  transition: all var(--transition-fast);
  text-align: left;
}

.feed-publisher-input:hover {
  background-color: rgba(79, 70, 229, 0.05);
  border-color: var(--primary-color);
}

.feed-publisher-actions {
  display: flex;
  justify-content: space-around;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  gap: 8px;
}

.feed-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: none;
  border: none;
}

.feed-action-btn:hover {
  background-color: rgba(79, 70, 229, 0.04);
  color: var(--primary-color);
}

.feed-post {
  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.feed-post:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feed-post-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.feed-post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feed-post-author {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-color);
}

.feed-post-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.feed-post-body {
  font-size: 0.95rem;
  color: var(--text-color);
  margin-bottom: 16px;
  line-height: 1.6;
}

.feed-post-attachment {
  background: rgba(79, 70, 229, 0.01);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}

.feed-post-actions {
  display: flex;
  border-top: 1px solid var(--border-color);
  padding-top: 12px;
  justify-content: flex-end;
  gap: 12px;
}

/* ==========================================
   RESPONSIVE DESIGN & MOBILE APP SHELL
   ========================================== */
.mobile-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .app-container {
    flex-direction: column;
  }
  
  .sidebar {
    display: none !important; /* Hide sidebar entirely on mobile views */
  }

  .main-content {
    padding: 24px;
    padding-bottom: 96px; /* High padding for navigation bar spacing */
  }

  .main-content header {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-content header > div:last-child {
    width: 100%;
    max-width: 100%;
    justify-content: flex-start;
  }

  .dashboard-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card {
    padding: 20px;
  }

  .card-value {
    font-size: 1.85rem;
  }

  .mobile-bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 68px;
    background-color: var(--card-background);
    border-top: 1px solid var(--border-color);
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
    box-shadow: 0 -4px 15px rgba(15, 23, 42, 0.05);
  }

  .mobile-bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.65rem;
    font-weight: 700;
    flex: 1;
    height: 100%;
    gap: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
  }

  .mobile-bottom-nav a.active {
    color: var(--primary-color);
  }

  .mobile-bottom-nav a svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    fill: none;
    transition: stroke var(--transition-fast);
  }

  .mobile-bottom-nav a.active svg {
    stroke: var(--primary-color);
  }
}

/* ==========================================
   PRINT LAYOUT STYLING (FOR PDF EXPORTS)
   ========================================== */
@media print {
  body {
    background-color: #ffffff !important;
    color: #000000 !important;
    font-size: 10pt;
  }
  .sidebar, .btn, .no-print, .wizard-steps, .mobile-bottom-nav, form {
    display: none !important;
  }
  .main-content {
    width: 100% !important;
    padding: 0 !important;
  }
  table {
    min-width: 100% !important;
    border: 1px solid #000000 !important;
  }
  th, td {
    padding: 8px !important;
    border: 1px solid #e2e8f0 !important;
  }
  .card {
    border: 1px solid #e2e8f0 !important;
    box-shadow: none !important;
    transform: none !important;
  }
}