/* ITU Video Portal - Simple Top-Right Search Interface */

/* ============================================================================
   ITU DESIGN SYSTEM VARIABLES
   ============================================================================ */
:root {
  /* ITU Official Colors */
  --itu-blue: #009CD6;
  --itu-blue-dark: #007BA5;
  --itu-blue-light: #B3E0F2;
  --itu-blue-pale: #F0F9FC;
  
  /* Typography Colors */
  --itu-text-primary: #2C2C2C;
  --itu-text-secondary: #666666;
  --itu-text-muted: #999999;
  --itu-background-white: #FFFFFF;
  --itu-border-light: #E5E5E5;
  --itu-border-medium: #CCCCCC;
  
  /* ITU Typography */
  --itu-font-primary: 'Avenir Next LT Pro', 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --itu-font-weight-regular: 400;
  --itu-font-weight-medium: 500;
  --itu-font-weight-semibold: 600;
  
  /* Spacing */
  --itu-spacing-xs: 0.25rem;
  --itu-spacing-sm: 0.5rem;
  --itu-spacing-md: 1rem;
  --itu-spacing-lg: 1.5rem;
  --itu-spacing-xl: 2rem;
  
  /* Transitions */
  --itu-transition: 0.25s ease;
}

/* ============================================================================
   CLEAN ITU HEADER WITH TOP-RIGHT SEARCH
   ============================================================================ */
.itu-main-header {
  background: var(--itu-background-white);
  border-bottom: 2px solid var(--itu-border-light);
  padding: var(--itu-spacing-lg) 0;
  position: relative;
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--itu-spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ITU Branding */
.itu-branding {
  display: flex;
  align-items: center;
  gap: var(--itu-spacing-md);
}

.itu-logo svg {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.itu-title h1 {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-semibold);
  font-size: 1.5rem;
  color: var(--itu-text-primary);
  margin: 0;
  line-height: 1.2;
}

.itu-title p {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-regular);
  font-size: 0.85rem;
  color: var(--itu-text-secondary);
  margin: 0;
  line-height: 1.3;
}

/* Top-Right Search Area */
.header-search-area {
  display: flex;
  align-items: center;
  gap: var(--itu-spacing-md);
}

/* Simple Search Box */
.simple-search-box {
  display: flex;
  align-items: center;
  background: var(--itu-background-white);
  border: 2px solid var(--itu-border-medium);
  border-radius: 8px;
  padding: 0;
  transition: all var(--itu-transition);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.simple-search-box:focus-within {
  border-color: var(--itu-blue);
  box-shadow: 0 2px 8px rgba(0, 156, 214, 0.15);
}

.header-search-input {
  border: none;
  outline: none;
  padding: 0.75rem 1rem;
  font-family: var(--itu-font-primary);
  font-size: 0.95rem;
  color: var(--itu-text-primary);
  background: transparent;
  width: 280px;
  min-width: 200px;
}

.header-search-input::placeholder {
  color: var(--itu-text-muted);
}

.search-submit-btn {
  background: var(--itu-blue);
  border: none;
  padding: 0.75rem;
  margin: 0;
  border-top-right-radius: 6px;
  border-bottom-right-radius: 6px;
  color: white;
  cursor: pointer;
  transition: background-color var(--itu-transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-submit-btn:hover {
  background: var(--itu-blue-dark);
}

.search-submit-btn:active {
  transform: scale(0.98);
}

/* Advanced Search Toggle */
.advanced-search-toggle {
  background: none;
  border: 1px solid var(--itu-border-medium);
  border-radius: 6px;
  padding: 0.75rem 1rem;
  font-family: var(--itu-font-primary);
  font-size: 0.85rem;
  font-weight: var(--itu-font-weight-medium);
  color: var(--itu-text-secondary);
  cursor: pointer;
  transition: all var(--itu-transition);
  white-space: nowrap;
}

.advanced-search-toggle:hover {
  border-color: var(--itu-blue);
  color: var(--itu-blue);
  background: var(--itu-blue-pale);
}

.advanced-search-toggle[aria-expanded="true"] {
  background: var(--itu-blue);
  border-color: var(--itu-blue);
  color: white;
}

/* ============================================================================
   MINIMAL ADVANCED SEARCH PANEL
   ============================================================================ */
.advanced-search-panel {
  background: var(--itu-blue-pale);
  border-bottom: 1px solid var(--itu-border-light);
  padding: var(--itu-spacing-lg) 0;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.advanced-search-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--itu-spacing-lg);
}

.advanced-search-content h3 {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-semibold);
  font-size: 1.1rem;
  color: var(--itu-text-primary);
  margin: 0 0 var(--itu-spacing-md) 0;
}

/* Date Range Inputs */
.date-range-inputs {
  display: flex;
  align-items: center;
  gap: var(--itu-spacing-lg);
  flex-wrap: wrap;
}

.date-input-group {
  display: flex;
  align-items: center;
  gap: var(--itu-spacing-sm);
}

.date-input-group label {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-medium);
  font-size: 0.9rem;
  color: var(--itu-text-primary);
  white-space: nowrap;
}

.date-input {
  border: 2px solid var(--itu-border-medium);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-family: var(--itu-font-primary);
  font-size: 0.9rem;
  color: var(--itu-text-primary);
  background: var(--itu-background-white);
  transition: border-color var(--itu-transition);
  width: 140px;
}

.date-input:focus {
  outline: none;
  border-color: var(--itu-blue);
  box-shadow: 0 0 0 2px rgba(0, 156, 214, 0.1);
}

.date-clear-btn {
  background: none;
  border: 1px solid var(--itu-border-medium);
  border-radius: 6px;
  padding: 0.5rem 1rem;
  font-family: var(--itu-font-primary);
  font-size: 0.85rem;
  color: var(--itu-text-secondary);
  cursor: pointer;
  transition: all var(--itu-transition);
}

.date-clear-btn:hover {
  border-color: var(--itu-blue);
  color: var(--itu-blue);
  background: var(--itu-background-white);
}

/* ============================================================================
   HERO SECTION UPDATES
   ============================================================================ */
.hero-section {
  background: linear-gradient(135deg, var(--itu-blue-pale) 0%, var(--itu-background-white) 100%);
  padding: var(--itu-spacing-xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--itu-spacing-lg);
}

.hero-title {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-semibold);
  font-size: 2.25rem;
  color: var(--itu-text-primary);
  margin: 0 0 var(--itu-spacing-md) 0;
  line-height: 1.1;
}

.hero-subtitle {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-regular);
  font-size: 1.1rem;
  color: var(--itu-text-secondary);
  margin: 0;
  line-height: 1.5;
}

/* ============================================================================
   SEARCH RESULTS HIGHLIGHTING
   ============================================================================ */
.search-active .meeting-card {
  transition: opacity var(--itu-transition), transform var(--itu-transition);
}

.search-active .meeting-card.filtered-out {
  display: none;
}

.search-active .meeting-card.search-match {
  box-shadow: 0 4px 12px rgba(0, 156, 214, 0.2);
  transform: scale(1.02);
}

/* Search result highlighting in titles */
.search-highlight {
  background: rgba(0, 156, 214, 0.2);
  padding: 0.1em 0.2em;
  border-radius: 3px;
  font-weight: var(--itu-font-weight-medium);
}

/* ============================================================================
   LOADING STATES
   ============================================================================ */
.search-loading .search-submit-btn {
  position: relative;
}

.search-loading .search-submit-btn svg {
  opacity: 0;
}

.search-loading .search-submit-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Empty search state */
.search-empty-state {
  text-align: center;
  padding: var(--itu-spacing-xl);
  color: var(--itu-text-secondary);
}

.search-empty-state h3 {
  font-family: var(--itu-font-primary);
  font-weight: var(--itu-font-weight-medium);
  font-size: 1.2rem;
  margin-bottom: var(--itu-spacing-sm);
}

.search-empty-state p {
  font-family: var(--itu-font-primary);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: var(--itu-spacing-md);
    align-items: center;
  }

  .itu-branding {
    flex-direction: column;
    text-align: center;
    gap: var(--itu-spacing-sm);
  }

  .header-search-area {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .header-search-input {
    width: 240px;
  }

  .date-range-inputs {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--itu-spacing-md);
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .header-search-area {
    flex-direction: column;
    gap: var(--itu-spacing-sm);
  }

  .simple-search-box {
    width: 100%;
  }

  .header-search-input {
    width: 100%;
    min-width: auto;
  }

  .advanced-search-toggle {
    width: 100%;
    text-align: center;
  }

  .date-input {
    width: 120px;
  }
}

/* ============================================================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
.header-search-input:focus-visible,
.search-submit-btn:focus-visible,
.advanced-search-toggle:focus-visible,
.date-input:focus-visible,
.date-clear-btn:focus-visible {
  outline: 2px solid var(--itu-blue);
  outline-offset: 2px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --itu-border-light: #666666;
    --itu-border-medium: #333333;
    --itu-text-muted: #666666;
  }
  
  .simple-search-box {
    border-width: 3px;
  }
}