/* =================================================
   HELO SYSTEMS - THEME MANAGEMENT SYSTEM
   QM Dokumentenmanagement - Dark/Light Mode Toggle
   ================================================= */

/* =================================================
   THEME TRANSITION SETUP
   ================================================= */
:root {
  /* Transition timing variables */
  --transition-theme: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  --transition-fast: all 0.15s ease;
  --transition-normal: all 0.3s ease;
  --transition-slow: all 0.6s ease;
}

/* Apply smooth transitions to all themable elements */
*,
*::before,
*::after {
  transition: var(--transition-theme);
}

/* Special handling for elements that should not transition */
.no-theme-transition,
.no-theme-transition *,
.CodeMirror,
.CodeMirror * {
  transition: none !important;
}

/* =================================================
   THEME SWITCHING MECHANISM
   ================================================= */

/* Base theme application */
html {
  background-color: var(--background-primary);
  color: var(--text-primary);
}

body {
  background-color: var(--background-primary);
  color: var(--text-primary);
  transition: var(--transition-theme);
}

/* Theme toggle preparation - JavaScript will add/remove data-theme */
html[data-theme="dark"] {
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

/* Auto theme detection fallback */
html:not([data-theme]) {
  color-scheme: light dark;
}

/* =================================================
   CORE ELEMENT THEMING
   ================================================= */

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--helo-primary);
  transition: var(--transition-theme);
}

/* Links */
a {
  color: var(--helo-primary);
  transition: var(--transition-theme);
}

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

/* Text utilities */
.text-primary { color: var(--helo-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-success { color: var(--helo-success) !important; }
.text-warning { color: var(--helo-warning) !important; }
.text-danger { color: var(--helo-danger) !important; }
.text-info { color: var(--helo-info) !important; }

/* =================================================
   COMPONENT THEMING
   ================================================= */

/* Cards */
.card {
  background-color: var(--background-tertiary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-md);
  transition: var(--transition-theme);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-header {
  background-color: var(--background-secondary);
  border-bottom-color: var(--border-color);
  color: var(--helo-primary);
  transition: var(--transition-theme);
}

.card-body {
  background-color: var(--background-tertiary);
  transition: var(--transition-theme);
}

/* Navigation */
.navbar {
  background-color: var(--helo-primary) !important;
  border-bottom-color: var(--helo-accent);
  box-shadow: var(--shadow-md);
  transition: var(--transition-theme);
}

.navbar-brand {
  color: var(--text-inverse) !important;
}

.navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.9) !important;
  transition: var(--transition-fast);
}

.navbar-nav .nav-link:hover {
  color: var(--text-inverse) !important;
  background-color: var(--helo-secondary);
}

.navbar-nav .nav-link.active {
  background-color: var(--helo-accent);
  color: var(--text-inverse) !important;
}

/* Forms */
.form-control,
.form-select {
  background-color: var(--background-primary);
  border-color: var(--border-color);
  color: var(--text-primary);
  transition: var(--transition-theme);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--helo-primary);
  box-shadow: 0 0 0 0.2rem var(--focus-ring);
  background-color: var(--background-primary);
  color: var(--text-primary);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.form-floating > label {
  color: var(--text-secondary);
}

.form-floating > .form-control:focus ~ label,
.form-floating > .form-control:not(:placeholder-shown) ~ label {
  color: var(--helo-primary);
}

/* Buttons */
.btn {
  border-width: 2px;
  transition: var(--transition-fast);
}

.btn:focus {
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn-primary {
  background: var(--helo-primary);
  border-color: var(--helo-primary);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background: var(--helo-primary-dark);
  border-color: var(--helo-primary-dark);
  color: var(--text-inverse);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline-primary {
  color: var(--helo-primary);
  border-color: var(--helo-primary);
  background-color: transparent;
}

.btn-outline-primary:hover {
  background-color: var(--helo-primary);
  border-color: var(--helo-primary);
  color: var(--text-inverse);
}

.btn-success {
  background-color: var(--helo-success);
  border-color: var(--helo-success);
  color: var(--text-inverse);
}

.btn-success:hover {
  background-color: var(--helo-success-dark);
  border-color: var(--helo-success-dark);
}

.btn-warning {
  background-color: var(--helo-warning);
  border-color: var(--helo-warning);
  color: var(--helo-gray-900);
}

.btn-warning:hover {
  background-color: var(--helo-warning-dark);
  border-color: var(--helo-warning-dark);
}

.btn-danger {
  background-color: var(--helo-danger);
  border-color: var(--helo-danger);
  color: var(--text-inverse);
}

.btn-danger:hover {
  background-color: var(--helo-danger-dark);
  border-color: var(--helo-danger-dark);
}

/* Tables */
.table {
  color: var(--text-primary);
  transition: var(--transition-theme);
}

.table th {
  background-color: var(--background-secondary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

.table td {
  border-color: var(--border-color);
}

.table-striped > tbody > tr:nth-of-type(odd) > td,
.table-striped > tbody > tr:nth-of-type(odd) > th {
  background-color: var(--background-secondary);
}

.table-hover > tbody > tr:hover > td,
.table-hover > tbody > tr:hover > th {
  background-color: var(--hover-overlay);
}

/* Modals */
.modal-content {
  background-color: var(--background-tertiary);
  border-color: var(--border-color);
  transition: var(--transition-theme);
}

.modal-header {
  border-bottom-color: var(--border-color);
}

.modal-footer {
  border-top-color: var(--border-color);
}

.modal-title {
  color: var(--text-primary);
}

/* =================================================
   STATUS AND BADGE THEMING
   ================================================= */

.badge {
  transition: var(--transition-theme);
}

/* Status badges with theme-appropriate colors */
.status-draft { 
  background-color: var(--helo-secondary) !important; 
  color: var(--text-inverse) !important;
}

.status-submitted-for-qm { 
  background-color: var(--helo-warning) !important; 
  color: var(--helo-gray-900) !important; 
}

.status-qm-approved { 
  background-color: var(--helo-info) !important; 
  color: var(--text-inverse) !important;
}

.status-published { 
  background-color: var(--helo-success) !important; 
  color: var(--text-inverse) !important;
}

.status-archived { 
  background-color: var(--helo-gray-600) !important; 
  color: var(--text-inverse) !important;
}

/* =================================================
   DOCUMENT AND CONTENT THEMING
   ================================================= */

.document-row {
  background-color: var(--background-tertiary);
  transition: var(--transition-theme);
}

.document-row:hover {
  background-color: var(--background-secondary);
  box-shadow: var(--shadow-md);
}

.document-row.border-warning {
  border-left-color: var(--helo-warning) !important;
}

.document-row.border-info {
  border-left-color: var(--helo-info) !important;
}

.document-row.border-success {
  border-left-color: var(--helo-success) !important;
}

/* Process steps */
.process-step {
  background-color: var(--background-secondary);
  border-left-color: var(--border-color);
  transition: var(--transition-theme);
}

.process-step.active {
  background-color: var(--helo-primary-light);
  border-left-color: var(--helo-primary);
}

.process-step.completed {
  background-color: var(--helo-success-light);
  border-left-color: var(--helo-success);
}

.process-step.rejected {
  background-color: var(--helo-danger-light);
  border-left-color: var(--helo-danger);
}

.process-step .step-icon {
  background-color: var(--border-color);
  transition: var(--transition-theme);
}

.process-step.active .step-icon {
  background-color: var(--helo-primary);
  color: var(--text-inverse);
}

.process-step.completed .step-icon {
  background-color: var(--helo-success);
  color: var(--text-inverse);
}

/* =================================================
   EDITOR THEMING
   ================================================= */

.CodeMirror {
  background-color: var(--background-primary) !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
}

.CodeMirror-cursor {
  border-left-color: var(--text-primary) !important;
}

.CodeMirror-selected {
  background-color: var(--helo-primary-light) !important;
}

.CodeMirror-focused .CodeMirror-selected {
  background-color: var(--helo-primary-light) !important;
}

.CodeMirror-gutters {
  background-color: var(--background-secondary) !important;
  border-right-color: var(--border-color) !important;
}

.CodeMirror-linenumber {
  color: var(--text-muted) !important;
}

.editor-toolbar {
  background-color: var(--background-secondary) !important;
  border-color: var(--border-color) !important;
}

.editor-toolbar button {
  color: var(--text-secondary) !important;
}

.editor-toolbar button:hover {
  background-color: var(--hover-overlay) !important;
  color: var(--text-primary) !important;
}

/* Preview content */
#preview-content {
  background-color: var(--background-primary);
  color: var(--text-primary);
  transition: var(--transition-theme);
}

#preview-content h1,
#preview-content h2,
#preview-content h3,
#preview-content h4,
#preview-content h5,
#preview-content h6 {
  color: var(--helo-primary);
}

#preview-content code {
  background-color: var(--background-secondary);
  border-color: var(--border-color);
  color: var(--helo-danger);
}

#preview-content pre {
  background-color: var(--background-secondary);
  border-color: var(--border-color);
}

#preview-content blockquote {
  border-left-color: var(--helo-primary);
  color: var(--text-secondary);
}

#preview-content th {
  background-color: var(--background-secondary);
}

#preview-content th,
#preview-content td {
  border-color: var(--border-color);
}

/* =================================================
   THEME TOGGLE BUTTON COMPONENT
   ================================================= */

.theme-toggle {
  position: relative;
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50px;
  padding: 0.5rem;
  cursor: pointer;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 60px;
  height: 40px;
}

.theme-toggle:hover {
  border-color: var(--helo-primary);
  background-color: var(--hover-overlay);
}

.theme-toggle:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-ring);
}

.theme-toggle .icon {
  font-size: 1.2rem;
  transition: var(--transition-fast);
}

.theme-toggle .icon-sun {
  color: var(--helo-warning);
}

.theme-toggle .icon-moon {
  color: var(--helo-primary);
}

/* Hide/show icons based on theme */
[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-moon,
:root:not([data-theme]) .theme-toggle .icon-moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun {
    display: none;
  }
  
  :root:not([data-theme]) .theme-toggle .icon-moon {
    display: inline;
  }
}

/* =================================================
   FOOTER THEMING
   ================================================= */

footer {
  background-color: var(--background-secondary) !important;
  border-top-color: var(--helo-primary) !important;
  color: var(--text-primary);
  transition: var(--transition-theme);
}

/* =================================================
   ACCESSIBILITY ENHANCEMENTS
   ================================================= */

/* Focus indicators for keyboard navigation */
.focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 2px;
}

/* High contrast adjustments are handled in variables.css */

/* Skip link for keyboard navigation */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--helo-primary);
  color: var(--text-inverse);
  padding: 8px;
  text-decoration: none;
  z-index: 9999;
  border-radius: 0 0 4px 4px;
  transition: var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* =================================================
   PERFORMANCE OPTIMIZATIONS
   ================================================= */

/* Reduce animations on mobile for performance */
@media (max-width: 768px) {
  .card:hover {
    transform: none;
  }
  
  .document-row:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* Honor reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
  
  :root {
    --transition-theme: none;
    --transition-fast: none;
    --transition-normal: none;
    --transition-slow: none;
  }
}

/* =================================================
   PRINT STYLES
   ================================================= */

@media print {
  /* Force light mode for printing */
  * {
    color: #000 !important;
    background: #fff !important;
    box-shadow: none !important;
    transition: none !important;
  }
  
  .theme-toggle {
    display: none !important;
  }
}