/* ============================================
   PAGE-HEADER.CSS - Funky Sticky Page Headers
   Phase 3C: Page headers with sticky behavior
   ============================================ */

/* ============================================
   CSS VARIABLES - Page Header Theming
   ============================================ */
:root {
  --page-header-height: 60px;
  --page-header-padding: 16px 24px;
  --page-header-sticky-offset: 0;
  --page-header-z-index: 100;
}

/* ============================================
   PAGE HEADER BASE
   ============================================ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: var(--page-header-padding);
  min-height: var(--page-header-height);
  background: var(--pro-bg-primary, #0d1117);
  border-bottom: 1px solid var(--pro-border-color, #30363d);
  margin-bottom: 24px;
  transition: all 0.2s ease;
}

/* ============================================
   PAGE HEADER CONTENT
   ============================================ */
.page-header-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  flex: 1;
}

.page-header-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 600;
  color: var(--pro-text-primary, #e6edf3);
  margin: 0;
  line-height: 1.3;
}

.page-header-title i {
  font-size: 18px;
  color: var(--user-accent, var(--pro-accent-primary, #2f81f7));
}

.page-header-subtitle {
  font-size: 13px;
  color: var(--pro-text-secondary, #8b949e);
  margin: 0;
}

/* Breadcrumbs in header */
.page-header .breadcrumb-pro {
  margin-bottom: 4px;
}

/* ============================================
   PAGE HEADER ACTIONS
   ============================================ */
.page-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.page-header-actions .btn-funky,
.page-header-actions .btn-funky-primary,
.page-header-actions .btn-funky-secondary {
  height: 36px;
}

/* ============================================
   STICKY PAGE HEADER
   ============================================ */
.page-header-sticky {
  position: sticky;
  top: var(--page-header-sticky-offset);
  z-index: var(--page-header-z-index);
  background: var(--pro-bg-primary, #0d1117);
}

/* When header becomes stuck */
.page-header-sticky.is-sticky {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(13, 17, 23, 0.9);
  box-shadow: 
    0 1px 0 0 var(--pro-border-color, #30363d),
    0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Animation for sticky state */
.page-header-sticky {
  transition: 
    background 0.2s ease,
    box-shadow 0.2s ease;
}

/* Compact mode when sticky */
.page-header-sticky.is-sticky .page-header-title {
  font-size: 16px;
}

.page-header-sticky.is-sticky .page-header-subtitle {
  display: none;
}

.page-header-sticky.is-sticky .breadcrumb-pro {
  display: none;
}

/* ============================================
   PAGE HEADER VARIANTS
   ============================================ */

/* Compact header */
.page-header.page-header-compact {
  min-height: 48px;
  padding: 12px 20px;
}

.page-header.page-header-compact .page-header-title {
  font-size: 16px;
}

/* Large header */
.page-header.page-header-large {
  min-height: 80px;
  padding: 24px 32px;
}

.page-header.page-header-large .page-header-title {
  font-size: 24px;
}

/* Transparent header (for overlay on hero) */
.page-header.page-header-transparent {
  background: transparent;
  border-bottom: none;
}

/* Borderless header */
.page-header.page-header-borderless {
  border-bottom: none;
  margin-bottom: 16px;
}

/* ============================================
   PAGE HEADER WITH TABS
   ============================================ */
.page-header-tabs {
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  padding-bottom: 0;
}

.page-header-tabs .page-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
}

.page-header-tabs .nav-tabs {
  border-bottom: none;
  margin: 0 -24px;
  padding: 0 24px;
  background: var(--pro-bg-secondary, #161b22);
}

/* ============================================
   PAGE HEADER SEARCH
   ============================================ */
.page-header-search {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 300px;
}

.page-header-search input {
  height: 36px;
  padding: 0 12px;
  background: var(--pro-bg-tertiary, #21262d);
  border: 1px solid var(--pro-border-color, #30363d);
  border-radius: 6px;
  color: var(--pro-text-primary, #e6edf3);
  font-size: 13px;
  width: 100%;
  transition: all 0.15s ease;
}

.page-header-search input:focus {
  border-color: var(--focus-ring-color);
}

.page-header-search input:focus-visible {
  border-color: var(--focus-ring-color);
  outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-shadow);
}

.page-header-search input::placeholder {
  color: var(--pro-text-muted, #6e7681);
}

/* ============================================
   PAGE HEADER BADGES
   ============================================ */
.page-header-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 20px;
  background: var(--pro-bg-tertiary, #21262d);
  color: var(--pro-text-secondary, #8b949e);
  border: 1px solid var(--pro-border-color, #30363d);
}

.page-header-badge.badge-success {
  background: rgba(63, 185, 80, 0.15);
  color: var(--pro-accent-success, #3fb950);
  border-color: transparent;
}

.page-header-badge.badge-warning {
  background: rgba(210, 153, 34, 0.15);
  color: var(--pro-accent-warning, #d29922);
  border-color: transparent;
}

.page-header-badge.badge-danger {
  background: rgba(248, 81, 73, 0.15);
  color: var(--pro-accent-danger, #f85149);
  border-color: transparent;
}

.page-header-badge.badge-info {
  background: rgba(88, 166, 255, 0.15);
  color: var(--pro-accent-info, #58a6ff);
  border-color: transparent;
}

/* ============================================
   PAGE HEADER WITH SIDEBAR OFFSET
   ============================================ */
.main-wrapper .page-header-sticky {
  /* Account for sidebar when sticky */
  margin-left: 0;
  width: 100%;
}

/* When sidebar is collapsed */
.main-wrapper.sidebar-collapsed .page-header-sticky.is-sticky {
  /* Adjust for collapsed sidebar width */
}

/* ============================================
   RESPONSIVE - Tablet
   ============================================ */
@media (max-width: 1024px) {
  .page-header {
    padding: 12px 20px;
    min-height: 52px;
  }
  
  .page-header-title {
    font-size: 18px;
  }
  
  .page-header-actions {
    gap: 6px;
  }
  
  /* Hide some action buttons on tablet */
  .page-header-actions .btn-text-desktop {
    display: none;
  }
}

/* ============================================
   RESPONSIVE - Mobile
   ============================================ */
@media (max-width: 768px) {
  .page-header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 12px 16px;
  }
  
  .page-header-content {
    order: 1;
  }
  
  .page-header-actions {
    order: 2;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  
  .page-header-title {
    font-size: 16px;
  }
  
  .page-header-subtitle {
    font-size: 12px;
  }
  
  /* Sticky adjustments for mobile */
  .page-header-sticky.is-sticky {
    padding: 8px 16px;
  }
  
  .page-header-sticky.is-sticky .page-header-content {
    flex-direction: row;
    align-items: center;
  }
  
  .page-header-sticky.is-sticky .page-header-actions {
    display: none;
  }
  
  .page-header-search {
    max-width: 100%;
    width: 100%;
    order: 3;
  }
}

/* ============================================
   LIGHT THEME OVERRIDES
   ============================================ */
[data-theme="light"] .page-header {
  background: var(--pro-bg-primary);
  border-bottom-color: var(--pro-border-color);
}

[data-theme="light"] .page-header-title {
  color: var(--pro-text-primary);
}

[data-theme="light"] .page-header-title i {
  color: var(--pro-accent-primary);
}

[data-theme="light"] .page-header-subtitle {
  color: var(--pro-text-secondary);
}

[data-theme="light"] .page-header-sticky.is-sticky {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 
    0 1px 0 0 var(--pro-border-color),
    0 4px 16px rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .page-header-search input {
  background: var(--pro-bg-secondary);
  border-color: var(--pro-border-color);
  color: var(--pro-text-primary);
}

[data-theme="light"] .page-header-search input:focus {
  border-color: var(--focus-ring-color);
}

[data-theme="light"] .page-header-search input:focus-visible {
  border-color: var(--focus-ring-color);
  outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
  outline-offset: var(--focus-ring-offset);
  box-shadow: var(--focus-ring-shadow);
}

[data-theme="light"] .page-header-search input::placeholder {
  color: var(--pro-text-muted);
}

[data-theme="light"] .page-header-badge {
  background: var(--pro-bg-secondary);
  color: var(--pro-text-secondary);
  border-color: var(--pro-border-color);
}

[data-theme="light"] .page-header-badge.badge-success {
  background: rgba(26, 127, 55, 0.1);
  color: var(--pro-accent-success);
}

[data-theme="light"] .page-header-badge.badge-warning {
  background: rgba(154, 103, 0, 0.1);
  color: var(--pro-accent-warning);
}
}

[data-theme="light"] .page-header-badge.badge-danger {
  background: rgba(207, 34, 46, 0.1);
  color: var(--pro-accent-danger);
}

[data-theme="light"] .page-header-badge.badge-info {
  background: rgba(9, 105, 218, 0.1);
  color: var(--pro-accent-info);
}

/* ============================================
   EVEN-FUNKYER THEME OVERRIDES
   ============================================ */
[data-theme="even-funkyer"] .page-header {
  background: rgba(10, 0, 21, 0.9);
  border-bottom-color: rgba(255, 0, 255, 0.3);
}

[data-theme="even-funkyer"] .page-header-title {
  color: var(--pro-text-primary);
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

[data-theme="even-funkyer"] .page-header-title i {
  color: var(--pro-accent-secondary);
  filter: drop-shadow(0 0 5px rgba(0, 255, 255, 0.5));
}

[data-theme="even-funkyer"] .page-header-subtitle {
  color: rgba(0, 255, 255, 0.7);
}

[data-theme="even-funkyer"] .page-header-sticky.is-sticky {
  background: rgba(10, 0, 21, 0.95);
  box-shadow: 
    0 1px 0 0 rgba(255, 0, 255, 0.4),
    0 4px 20px rgba(255, 0, 255, 0.15),
    0 0 40px rgba(0, 255, 255, 0.1);
}

[data-theme="even-funkyer"] .page-header-search input {
  background: rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 255, 255, 0.3);
  color: var(--pro-accent-secondary);
}

[data-theme="even-funkyer"] .page-header-search input:focus {
  border-color: var(--funkier-neon-pink, #ff00ff);
}

[data-theme="even-funkyer"] .page-header-search input:focus-visible {
  border-color: var(--funkier-neon-pink, #ff00ff);
  outline: var(--focus-ring-width) var(--focus-ring-style) var(--funkier-neon-pink, #ff00ff);
  outline-offset: var(--focus-ring-offset);
  box-shadow: 0 0 0 3px rgba(255, 0, 255, 0.3);
}

[data-theme="even-funkyer"] .page-header-search input::placeholder {
  color: rgba(0, 255, 255, 0.5);
}

[data-theme="even-funkyer"] .page-header-badge {
  background: rgba(255, 0, 255, 0.1);
  color: var(--pro-accent-primary);
  border-color: rgba(255, 0, 255, 0.3);
}

[data-theme="even-funkyer"] .page-header-badge.badge-success {
  background: rgba(0, 255, 136, 0.15);
  color: var(--pro-accent-success);
  box-shadow: 0 0 5px rgba(0, 255, 136, 0.3);
}

[data-theme="even-funkyer"] .page-header-badge.badge-warning {
  background: rgba(255, 170, 0, 0.15);
  color: var(--pro-accent-warning);
  box-shadow: 0 0 5px rgba(255, 170, 0, 0.3);
}

[data-theme="even-funkyer"] .page-header-badge.badge-danger {
  background: rgba(255, 0, 102, 0.15);
  color: var(--pro-accent-danger);
  box-shadow: 0 0 5px rgba(255, 0, 102, 0.3);
}

[data-theme="even-funkyer"] .page-header-badge.badge-info {
  background: rgba(0, 255, 255, 0.15);
  color: var(--pro-accent-info);
  box-shadow: 0 0 5px rgba(0, 255, 255, 0.3);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .page-header {
    position: static !important;
    background: white !important;
    border-bottom: 1px solid #ddd !important;
    box-shadow: none !important;
  }

  .page-header-actions {
    display: none !important;
  }

  .page-header-sticky.is-sticky {
    position: static !important;
  }
}

/* ============================================
   STICKY HEADER PLAYGROUND DEMO STYLES
   ============================================ */

/* Demo container with scroll area */
.sticky-header-demo__container {
  height: 400px;
  overflow-y: auto;
  border: 1px solid var(--pro-border-color, #30363d);
  border-radius: var(--pro-radius-md, 8px);
  position: relative;
  background: var(--pro-bg-secondary, #161b22);
}

.sticky-header-demo__container--short {
  height: 300px;
}

/* Demo sticky header */
.sticky-header-demo__header {
  position: sticky;
  top: 0;
  padding: var(--pro-spacing-md, 1rem);
  z-index: 10;
  transition:
    transform 0.3s ease,
    box-shadow 0.2s ease,
    padding 0.2s ease;
}

.sticky-header-demo__header--primary {
  background: var(--pro-primary, #238636);
  color: #ffffff;
}

.sticky-header-demo__header--success {
  background: var(--pro-success, #238636);
  color: #ffffff;
}

.sticky-header-demo__header--info {
  background: var(--pro-info, #1f6feb);
  color: #ffffff;
}

.sticky-header-demo__header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--pro-spacing-sm, 0.5rem);
}

.sticky-header-demo__title {
  font-size: var(--pro-font-size-md, 1rem);
  font-weight: 600;
  transition: font-size 0.2s ease;
}

.sticky-header-demo__indicator {
  flex-shrink: 0;
  font-size: var(--pro-font-size-sm, 0.8125rem);
}

/* Sticky state with shadow */
.sticky-header-demo__header.is-sticky {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* No shadow modifier (component class: sticky-header--no-shadow) */
.sticky-header-demo__header.is-sticky.sticky-header--no-shadow,
.sticky-header-demo__header.is-sticky.sticky-header-demo__header--no-shadow {
  box-shadow: none;
}

/* Compact mode (component class: sticky-header--compact-mode) */
.sticky-header-demo__header.sticky-header--compact-mode.is-sticky,
.sticky-header-demo__header.sticky-header-demo__header--compact.is-sticky {
  padding: var(--pro-spacing-sm, 0.5rem) var(--pro-spacing-md, 1rem);
}

.sticky-header-demo__header.sticky-header--compact-mode.is-sticky .sticky-header-demo__title,
.sticky-header-demo__header.sticky-header--compact-mode.is-sticky .page-header-title,
.sticky-header-demo__header.sticky-header-demo__header--compact.is-sticky .sticky-header-demo__title {
  font-size: var(--pro-font-size-sm, 0.875rem);
}

/* Hide subtitle when sticky (component class: sticky-header--hide-subtitle) */
.sticky-header-demo__header.sticky-header--hide-subtitle.is-sticky .page-header-subtitle,
.sticky-header-demo__header.sticky-header--hide-subtitle.is-sticky .sticky-header-demo__subtitle {
  display: none;
}

/* Subtitle styling */
.sticky-header-demo__subtitle {
  display: block;
  font-size: var(--pro-font-size-sm, 0.8125rem);
  font-weight: normal;
  opacity: 0.8;
  margin-top: 2px;
  transition: opacity 0.2s ease;
}

.sticky-header-demo__title-group {
  display: flex;
  flex-direction: column;
}

/* Hide on scroll state (component class: sticky-header--hideable) */
.sticky-header-demo__header.sticky-header--hideable.is-hidden,
.sticky-header-demo__header--hideable.is-hidden {
  transform: translateY(-100%);
}

/* Show on scroll state (component class: sticky-header--show-on-scroll) */
.sticky-header-demo__header.sticky-header--show-on-scroll,
.sticky-header-demo__header--show-on-scroll {
  opacity: 0;
  transform: translateY(-100%);
}

.sticky-header-demo__header.sticky-header--show-on-scroll.is-revealed,
.sticky-header-demo__header--show-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Scroll content area */
.sticky-header-demo__scroll-content {
  padding: var(--pro-spacing-md, 1rem);
}

.sticky-header-demo__scroll-content p {
  margin-bottom: var(--pro-spacing-md, 1rem);
  line-height: 1.6;
  color: var(--pro-text-secondary, #8b949e);
}

.sticky-header-demo__scroll-end {
  margin-bottom: 150px !important;
  font-style: italic;
  color: var(--pro-text-muted, #6e7681);
}

/* Button grid */
.sticky-header-demo__button-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--pro-spacing-sm, 0.75rem);
  align-items: flex-start;
}

.sticky-header-demo__button-grid .btn {
  flex-shrink: 0;
}

/* Event log */
.sticky-header-demo__log {
  font-family: var(--pro-font-mono, 'Monaco', 'Menlo', 'Consolas', monospace);
  font-size: var(--pro-font-size-sm, 0.8125rem);
  line-height: 1.6;
  padding: var(--pro-spacing-md, 1rem);
  margin: 0;
  background: var(--pro-bg-tertiary, #21262d);
  border: 1px solid var(--pro-border-color, #30363d);
  border-radius: var(--pro-radius-sm, 4px);
  max-height: 200px;
  overflow: auto;
  color: var(--pro-text, #c9d1d9);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .sticky-header-demo__container {
    height: 300px;
  }

  .sticky-header-demo__container--short {
    height: 250px;
  }

  .sticky-header-demo__button-grid {
    gap: var(--pro-spacing-xs, 0.5rem);
  }

  .sticky-header-demo__button-grid .btn {
    flex: 1 1 calc(50% - var(--pro-spacing-xs, 0.5rem));
    min-width: 120px;
  }
}

@media (max-width: 480px) {
  .sticky-header-demo__button-grid .btn {
    flex: 1 1 100%;
  }
}

/* High contrast mode */
@media (prefers-contrast: more) {
  .sticky-header-demo__container,
  .sticky-header-demo__log {
    border-width: 2px;
  }
}

/* Light theme adjustments */
[data-theme="light"] .sticky-header-demo__container {
  background: var(--pro-bg-secondary, #f6f8fa);
}

[data-theme="light"] .sticky-header-demo__header.is-sticky {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .sticky-header-demo__scroll-content p {
  color: var(--pro-text-secondary, #57606a);
}

[data-theme="light"] .sticky-header-demo__log {
  background: var(--pro-bg-tertiary, #f6f8fa);
}

/* High contrast theme */
[data-theme="high-contrast"] .sticky-header-demo__container {
  border: 2px solid #ffffff;
  background: #000000;
}

[data-theme="high-contrast"] .sticky-header-demo__header {
  border-bottom: 2px solid #ffffff;
}

[data-theme="high-contrast"] .sticky-header-demo__log {
  border: 2px solid #ffffff;
  background: #000000;
  color: #ffffff;
}

/* Even Funkyer theme */
[data-theme="even-funkyer"] .sticky-header-demo__header--primary {
  background: linear-gradient(135deg, var(--pro-primary), #ff00ff);
  box-shadow: 0 0 15px rgba(255, 0, 255, 0.3);
}

[data-theme="even-funkyer"] .sticky-header-demo__header--success {
  background: linear-gradient(135deg, var(--pro-success), #00ffff);
  box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

[data-theme="even-funkyer"] .sticky-header-demo__header--info {
  background: linear-gradient(135deg, var(--pro-info), #00ccff);
  box-shadow: 0 0 15px rgba(0, 204, 255, 0.3);
}

[data-theme="even-funkyer"] .sticky-header-demo__header.is-sticky {
  box-shadow: 0 2px 20px rgba(255, 0, 255, 0.4);
}