/* ═══════════════════════════════════════
   CHONG HUA HOSPITAL — UX Polish Layer
   Loaded after style.css for enhancements
   ═══════════════════════════════════════ */

/* === SKELETON LOADING === */
@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
.skeleton {
  background: linear-gradient(90deg, var(--color-surface-2) 25%, var(--color-surface) 50%, var(--color-surface-2) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

/* === SMOOTH PAGE TRANSITIONS === */
.animate-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.16,1,0.3,1), transform 0.5s cubic-bezier(0.16,1,0.3,1);
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === FOCUS STYLES (Accessibility) === */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* === SKIP TO CONTENT (Accessibility) === */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: white;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  z-index: 999;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 0;
}

/* === PRINT STYLES === */
@media print {
  .site-header, .site-footer, .emergency-bar, .mobile-nav,
  .mobile-menu-btn, .theme-toggle, .lang-toggle,
  .header-actions, #claim-banner, .btn-primary[href="booking.html"] {
    display: none !important;
  }
  body {
    background: white !important;
    color: #000 !important;
    font-size: 12pt !important;
  }
  .container { max-width: 100% !important; }
  a { color: #000 !important; text-decoration: underline !important; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #666; }
  a[href^="#"]::after, a[href^="javascript"]::after { content: none; }
  .doctor-card, .card { break-inside: avoid; box-shadow: none !important; border: 1px solid #ccc !important; }
}

/* === BOOKING CONFIRMATION PRINT === */
@media print {
  .booking-wizard .progress-bar { display: none !important; }
  .email-preview { border: 1px solid #ccc !important; }
}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  .animate-in { opacity: 1; transform: none; transition: none; }
  .skeleton { animation: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* === TOUCH TARGETS (Mobile Accessibility) === */
@media (pointer: coarse) {
  .nav-links a, .filter-btn, .specialty-chip, .time-slot,
  .msg-option, .quick-symptom, .dept-nav-item {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}

/* === DOCTOR STATUS INDICATORS === */
.status-available { color: #2E7D32; }
.status-on-leave { color: #E65100; }
.status-unavailable { color: #9E9E9E; }

.status-dot {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block;
}
.status-dot.available { background: #2E7D32; }
.status-dot.on-leave { background: #E65100; }
.status-dot.unavailable { background: #9E9E9E; }

/* === TOOLTIP === */
[data-tooltip] {
  position: relative;
  cursor: help;
}
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  background: var(--color-text);
  color: var(--color-text-inverse);
  font-size: 11px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s;
}
[data-tooltip]:hover::after { opacity: 1; }

/* === NOTIFICATION BADGE === */
.notif-badge {
  position: absolute; top: -4px; right: -4px;
  width: 18px; height: 18px;
  background: #D32F2F; color: white;
  font-size: 10px; font-weight: 700;
  border-radius: 50%; display: flex;
  align-items: center; justify-content: center;
  border: 2px solid var(--color-surface);
}

/* === EMPTY STATES === */
.empty-state {
  text-align: center; padding: var(--space-12) var(--space-4);
  color: var(--color-text-faint);
}
.empty-state svg { margin: 0 auto var(--space-4); opacity: 0.3; }
.empty-state h3 { font-family: var(--font-display); font-size: var(--text-base); font-weight: 600; color: var(--color-text-muted); margin-bottom: var(--space-2); }
.empty-state p { font-size: var(--text-sm); }

/* === TOAST NOTIFICATION === */
.toast {
  position: fixed; bottom: var(--space-6); right: var(--space-6);
  background: var(--color-text); color: white;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm); font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  animation: toastIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════
   RESPONSIVE — Full Device Coverage
   ═══════════════════════════════════════ */

/* === MOBILE SMALL (320px-374px) === */
@media (max-width: 374px) {
  .container { padding-inline: var(--space-3) !important; }
  .hero h1, .page-hero h1 { font-size: 1.5rem !important; }
  .hero .hero-sub { font-size: var(--text-sm) !important; }
  .stat-number, [data-count] { font-size: var(--text-lg) !important; }
  .search-bar { flex-direction: column; }
  .search-bar input { width: 100%; }
  .filter-bar, .specialty-chips { gap: var(--space-1); }
  .filter-btn, .specialty-chip { font-size: 11px; padding: 4px 8px; }
  .footer-grid { grid-template-columns: 1fr !important; }
  .btn-primary { font-size: 12px !important; padding: 6px 12px !important; }
  .emergency-bar .container { flex-direction: column; gap: var(--space-1); text-align: center; }
}

/* === MOBILE (375px-639px) === */
@media (max-width: 639px) {
  /* Header */
  .site-header .header-inner { padding: var(--space-2) var(--space-3); }
  .logo-text { font-size: 13px; }
  .logo-mark { height: 32px !important; }
  #portal-btn { display: none !important; }
  
  /* Hero */
  .hero { padding: var(--space-8) 0 !important; }
  .hero h1 { font-size: clamp(1.5rem, 6vw, 2rem) !important; }
  .hero .search-bar-wrap { padding: 0 var(--space-2); }
  
  /* Page heroes */
  .page-hero { padding: var(--space-6) 0 var(--space-4) !important; }
  .page-hero h1 { font-size: 1.5rem !important; }
  
  /* Doctor grid — single column */
  .doctor-grid { grid-template-columns: 1fr !important; }
  
  /* Cards */
  .card { padding: var(--space-3) !important; }
  
  /* Footer */
  .footer-grid { grid-template-columns: 1fr !important; gap: var(--space-4) !important; }
  .footer-bottom { flex-direction: column; text-align: center; gap: var(--space-2); }
  
  /* Section spacing */
  .section { padding: var(--space-6) 0 !important; }
  .section-header h2 { font-size: var(--text-lg) !important; }
  
  /* Booking calendar */
  .calendar-grid td, .cal-cell { min-height: 40px !important; font-size: 13px !important; }
  
  /* Quick links / specialty chips — horizontal scroll */
  .quick-links, .specialty-chips, .filter-bar {
    flex-wrap: nowrap !important;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: var(--space-2);
  }
  .quick-links::-webkit-scrollbar,
  .specialty-chips::-webkit-scrollbar,
  .filter-bar::-webkit-scrollbar { display: none; }
  
  /* Time slots — 3 columns instead of 4 */
  .time-slots-grid { grid-template-columns: repeat(3, 1fr) !important; }
  
  /* Testimonials */
  .testimonials-grid { grid-template-columns: 1fr !important; }
  
  /* Services grid */
  .services-grid { grid-template-columns: 1fr !important; }
  
  /* Price list */
  .price-layout { grid-template-columns: 1fr !important; }
  .dept-nav { position: static !important; display: flex; flex-wrap: nowrap; overflow-x: auto; gap: var(--space-1); padding-bottom: var(--space-2); }
  
  /* Stat cards */
  .stat-grid { grid-template-columns: repeat(2, 1fr) !important; gap: var(--space-3) !important; }
}

/* === TABLET (640px-1023px) === */
@media (min-width: 640px) and (max-width: 1023px) {
  .doctor-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .footer-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .services-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .stat-grid { grid-template-columns: repeat(4, 1fr) !important; }
}

/* === DESKTOP NAV DROPDOWNS === */
@media (min-width: 768px) {
  .nav-dropdown { position: relative; }
  .nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(8px);
    transition: all 0.2s cubic-bezier(0.16,1,0.3,1);
    z-index: 50;
  }
  .nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  .nav-dropdown-menu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: 13px;
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.1s;
    white-space: nowrap;
  }
  .nav-dropdown-menu a:hover {
    background: var(--color-primary-surface);
    color: var(--color-primary);
  }
}

/* === LARGE DESKTOP (1440px+) === */
@media (min-width: 1440px) {
  .container { max-width: 1280px; }
  .hero h1 { font-size: var(--text-2xl); }
}

/* === SAFE AREA (iPhone notch) === */
@supports (padding: env(safe-area-inset-bottom)) {
  .site-footer { padding-bottom: env(safe-area-inset-bottom); }
  .mobile-nav { padding-bottom: env(safe-area-inset-bottom); }
  #claim-banner { padding-bottom: calc(var(--space-3) + env(safe-area-inset-bottom)); }
}

/* === MOBILE NAV IMPROVEMENTS === */
.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 200;
  padding: var(--space-4);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
}
.mobile-nav.open {
  transform: translateX(0);
}
.mobile-nav a {
  display: block;
  padding: var(--space-3) var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--color-divider);
}
.mobile-nav a:hover, .mobile-nav a:active {
  color: var(--color-primary);
  background: var(--color-primary-surface);
}

/* === BOOKING FORM RESPONSIVE === */
@media (max-width: 639px) {
  .booking-wizard { padding: 0 var(--space-2) !important; }
  .progress-track { max-width: 100% !important; }
  .progress-node .node-circle { width: 32px !important; height: 32px !important; font-size: 12px !important; }
  .progress-node .node-label { font-size: 9px !important; }
  .progress-connector { min-width: 30px !important; }
  
  /* Form fields stack */
  .form-row, .form-grid { grid-template-columns: 1fr !important; }
  
  /* Doctor cards in booking — single column */
  .doctor-results { grid-template-columns: 1fr !important; }
}

/* === DOCTOR DASHBOARD RESPONSIVE === */
@media (max-width: 768px) {
  .dashboard-layout { grid-template-columns: 1fr !important; }
  .dashboard-sidebar { 
    position: fixed; left: -280px; top: 0; bottom: 0; 
    width: 280px; z-index: 100; 
    transition: left 0.3s cubic-bezier(0.16,1,0.3,1);
  }
  .dashboard-sidebar.open { left: 0; }
  .dashboard-topbar { padding: var(--space-2) var(--space-3) !important; }
  .overview-cards { grid-template-columns: repeat(2, 1fr) !important; }
}

/* === IMAGE ASPECT RATIOS === */
.doctor-avatar, .profile-photo-wrap img {
  aspect-ratio: 1;
  object-fit: cover;
}

/* === TEXT OVERFLOW PREVENTION === */
.doctor-name, .doctor-specialty, .rec-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ─── Emergency Bar Mobile Fix ─── */
@media (max-width: 480px) {
  .hide-xs { display: none !important; }
}