/* =================================================================
   CREAVIA.CSS - Global Theme Styles
   Shared styles for all pages with theme support and accessibility
   ================================================================= */

/* =================================================================
   CSS CUSTOM PROPERTIES (Variables)
   ================================================================= */

/* Light Theme Variables - WCAG AAA Compliant Colors */
:root {
  /* Navigation */
  --navbar-bg: #ffffff;
  --navbar-border: #d1d5db;
  --navbar-text: #111827;
  --navbar-text-hover: #1d4ed8;

  /* Body & Content */
  --body-bg: #ffffff;
  --body-color: #111827;

  /* Cards */
  --card-bg: #ffffff;
  --card-border: #d1d5db;
  --card-text: #111827;

  /* Layout Sections */
  --hero-bg: #f9fafb;
  --footer-bg: #f9fafb;
  --footer-color: #111827;

  /* Interactive Elements */
  --link-color: #1d4ed8;
  --border-color: #d1d5db;

  /* Buttons */
  --button-primary-bg: #1d4ed8;
  --button-primary-color: #ffffff;
  --button-outline-border: #1d4ed8;
  --button-outline-color: #1d4ed8;
  --button-outline-hover-bg: #1d4ed8;

  /* Alerts */
  --alert-info-bg: #f0f9ff;
  --alert-info-border: #0ea5e9;
  --alert-info-color: #0c4a6e;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  /* Navigation */
  --navbar-bg: #111827;
  --navbar-border: #374151;
  --navbar-text: #f9fafb;
  --navbar-text-hover: #93c5fd;

  /* Body & Content */
  --body-bg: #0f172a;
  --body-color: #f8fafc;

  /* Cards */
  --card-bg: #1e293b;
  --card-border: #475569;
  --card-text: #f8fafc;

  /* Layout Sections */
  --hero-bg: #1e293b;
  --footer-bg: #1e293b;
  --footer-color: #f8fafc;

  /* Interactive Elements */
  --link-color: #93c5fd;
  --border-color: #475569;

  /* Buttons */
  --button-primary-bg: #3b82f6;
  --button-primary-color: #ffffff;
  --button-outline-border: #93c5fd;
  --button-outline-color: #93c5fd;
  --button-outline-hover-bg: #3b82f6;

  /* Alerts */
  --alert-info-bg: #1e293b;
  --alert-info-border: #475569;
  --alert-info-color: #f8fafc;
}

/* =================================================================
   GLOBAL STYLES
   ================================================================= */

/* Body Theme Application */
body {
  background-color: var(--body-bg);
  color: var(--body-color);
  transition: 
    background-color 0.3s ease,
    color 0.3s ease;
}

/* =================================================================
   NAVIGATION COMPONENTS
   ================================================================= */

/* Main Navigation Bar */
.navbar {
  background-color: var(--navbar-bg) !important;
  border-bottom: 1px solid var(--navbar-border);
  transition: background-color 0.3s ease;
}

/* Navigation Brand & Links */
.navbar-brand,
.navbar-nav .nav-link {
  color: var(--navbar-text) !important;
  transition: color 0.3s ease;
}

.navbar-brand {
  pointer-events: none;
  text-decoration: none;
}

.navbar-brand:hover,
.navbar-brand:focus {
  color: var(--navbar-text) !important;
  text-decoration: none;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus {
  color: var(--navbar-text-hover) !important;
}

/* Navigation Toggle (Mobile) */
.navbar-toggler {
  border-color: var(--navbar-text);
  border-width: 2px;
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem rgba(29, 78, 216, 0.25);
}

/* Hamburger Icon - Light Theme */
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23111827' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Hamburger Icon - Dark Theme */
[data-theme="dark"] .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23f9fafb' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2.5' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

[data-theme="dark"] .navbar-toggler:focus {
  box-shadow: 0 0 0 0.25rem rgba(147, 197, 253, 0.25);
}

/* =================================================================
   CARD COMPONENTS
   ================================================================= */

.card {
  background-color: var(--card-bg);
  border-color: var(--card-border);
  transition: 
    background-color 0.3s ease,
    border-color 0.3s ease;
}

.card-body,
.card-title,
.card-text {
  color: var(--card-text);
  transition: color 0.3s ease;
}

/* =================================================================
   LAYOUT SECTIONS
   ================================================================= */

/* Hero Section */
.hero {
  background-color: var(--hero-bg);
  padding: 3rem 0;
  border-radius: 0.375rem;
  margin-bottom: 2rem;
  transition: background-color 0.3s ease;
}

/* Main Content Area */
main {
  padding-top: 2rem;
  padding-bottom: 2rem;
}

/* Footer */
footer {
  background-color: var(--footer-bg);
  color: var(--footer-color);
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 1px solid var(--border-color);
  transition: 
    background-color 0.3s ease,
    color 0.3s ease;
}

/* =================================================================
   ALERT COMPONENTS
   ================================================================= */

.alert-info {
  background-color: var(--alert-info-bg);
  border-color: var(--alert-info-border);
  color: var(--alert-info-color);
  border-width: 2px;
}

.alert-info .alert-heading {
  color: var(--alert-info-color);
}

/* =================================================================
   BUTTON COMPONENTS
   ================================================================= */

/* Primary Button */
.btn-primary {
  background-color: var(--button-primary-bg);
  border-color: var(--button-primary-bg);
  color: var(--button-primary-color);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--button-primary-bg);
  border-color: var(--button-primary-bg);
  color: var(--button-primary-color);
  filter: brightness(0.9);
}

/* Outline Primary Button */
.btn-outline-primary {
  border-color: var(--button-outline-border);
  color: var(--button-outline-color);
  background-color: transparent;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  background-color: var(--button-outline-hover-bg);
  border-color: var(--button-outline-border);
  color: var(--button-primary-color);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: 2px solid var(--navbar-text);
  color: var(--navbar-text);
  border-radius: 0.375rem;
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.3s ease;
}

.theme-toggle:hover,
.theme-toggle:focus {
  background-color: var(--navbar-text);
  color: var(--navbar-bg);
  outline: 2px solid var(--navbar-text);
  outline-offset: 2px;
}

/* =================================================================
   SPECIAL COMPONENTS
   ================================================================= */

/* Language Switcher */
.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.language-switcher .btn {
  font-size: 0.875rem;
  padding: 0.375rem 0.75rem;
  min-width: auto;
  white-space: nowrap;
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background-color: var(--button-primary-bg);
  color: var(--button-primary-color);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  font-size: 18px;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  filter: brightness(0.9);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 123, 255, 0.4);
}

.back-to-top:focus {
  outline: 3px solid #ffc107;
  outline-offset: 2px;
}

.back-to-top:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 123, 255, 0.3);
}

.back-to-top::before {
  content: '↑';
  font-size: 20px;
  font-weight: bold;
  line-height: 1;
}

/* =================================================================
   ACCESSIBILITY FEATURES
   ================================================================= */

/* Skip Link for Screen Readers */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: #000;
  color: #fff;
  padding: 8px;
  text-decoration: none;
  z-index: 1050;
  border-radius: 0 0 4px 4px;
}

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

/* Enhanced Focus Indicators - WCAG AAA */
.btn:focus,
.nav-link:focus {
  outline: 3px solid var(--button-outline-border);
  outline-offset: 2px;
}

.navbar-brand:focus {
  outline: 3px solid var(--navbar-text);
  outline-offset: 2px;
}

/* Screen Reader Only Content */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =================================================================
   UTILITY CLASSES
   ================================================================= */

.text-light {
  color: var(--link-color) !important;
}

.btn,
.nav-link,
.navbar-brand {
  cursor: pointer;
}

.navbar-nav .nav-item {
  margin-right: 1rem;
}

/* =================================================================
   RESPONSIVE DESIGN
   ================================================================= */

/* Tablet and Small Desktop */
@media (max-width: 991px) {
  .language-switcher {
    flex-direction: column;
    gap: 0.25rem;
    width: 100%;
    margin-top: 1rem;
  }
  
  .language-switcher .btn,
  .theme-toggle {
    width: 100%;
  }
}

/* Mobile Devices */
@media (max-width: 768px) {
  .back-to-top {
    bottom: 15px;
    right: 15px;
    width: 45px;
    height: 45px;
    font-size: 16px;
  }

  .back-to-top::before {
    font-size: 18px;
  }
}

/* =================================================================
   ACCESSIBILITY MEDIA QUERIES
   ================================================================= */

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .back-to-top {
    border: 2px solid;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: opacity 0.3s ease;
  }
  
  .back-to-top:hover {
    transform: none;
  }
}