/* ============================================
   LAYOUT.CSS - Navigation & Global Layout
   Loads after typography.css
   ============================================ */

/* ============================================
   NAVIGATION HEADER
   ============================================ */

.nav-header {
  /* Prompt 42 PR #24 Phase 4: tighter operational nav.
     bg-surface + border-subtle + minimal shadow. */
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  height: var(--header-height); /* now 64px */
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-xs);
  padding: var(--space-4) 4%;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-xl);
  margin: 0 auto;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  /* Prompt 42 PR #24 Phase 4: dark teal, tightened tracking. */
  font-weight: 700;
  color: #133240;
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.logo:hover {
  color: var(--brand-primary-hover);
}

.nav-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  gap: var(--space-8);
  margin-left: var(--space-12);
  flex: 1;
}

.nav-tab {
  position: relative;
  color: var(--color-neutral-500);
  text-decoration: none;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: var(--font-medium);
  padding-bottom: var(--space-1);
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  /* Prompt 42 PR #24 Phase 4: blue underline for active tab. */
  color: var(--brand-primary);
  font-weight: var(--font-semibold);
  border-bottom-color: var(--brand-primary);
}

/* Meal Count Badge */
.meal-count-badge {
  position: absolute;
  top: -8px;
  right: -12px;
  min-width: 18px;
  padding: 2px 6px;
  background: var(--color-accent-500);
  color: var(--color-neutral-0);
  font-size: 10px;
  font-weight: var(--font-semibold);
  font-family: var(--font-body);
  border-radius: var(--radius-full);
  text-align: center;
}

.meal-count-badge.empty {
  display: none;
}

/* Navigation Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Circle Button */
.btn-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-primary-500);
  background: var(--color-neutral-0);
  color: var(--color-primary-500);
  font-size: 18px;
  font-weight: var(--font-semibold);
  font-family: var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.btn-circle:hover {
  /* Prompt 42 PR #24: removed scale + shadow-primary glow. */
  background: var(--brand-primary);
  color: var(--bg-surface);
  border-color: var(--brand-primary-hover);
}

.btn-circle.active {
  background: var(--brand-primary);
  color: var(--bg-surface);
  border-color: var(--brand-primary-hover);
}

.btn-circle.primary {
  background: var(--brand-primary);
  color: var(--bg-surface);
  font-size: 22px;
  border-color: var(--brand-primary-hover);
}

.btn-circle.primary:hover {
  background: var(--brand-primary-hover);
  border-color: var(--brand-primary-hover);
}

/* User Button in Nav */
.btn-circle.user-btn {
  background: var(--color-primary-100);
  border-color: var(--color-primary-300);
  color: var(--color-primary-600);
}

.btn-circle.user-btn:hover {
  background: var(--color-primary-200);
  border-color: var(--color-primary-400);
  color: var(--color-primary-700);
}

.user-initial {
  font-size: 16px;
  font-weight: var(--font-semibold);
  text-transform: uppercase;
}

/* Auth Login Button */
.nav-auth-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  background: var(--color-primary-500);
  color: var(--color-neutral-0);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-auth-btn:hover {
  /* Prompt 42 PR #24: no translateY bounce. */
  background: var(--brand-primary-hover);
}

/* ============================================
   FLASH MESSAGES
   ============================================ */

.flash-messages {
  position: fixed;
  top: calc(var(--header-height) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: calc(var(--z-fixed) - 1);
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 90%;
  max-width: 500px;
}

.flash-message {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  box-shadow: var(--shadow-md);
  animation: fadeInDown 0.3s ease-out;
}

.flash-success {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #22c55e;
}

.flash-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #3b82f6;
}

.flash-warning {
  background: #fef3c7;
  color: #92400e;
  border: 1px solid #f59e0b;
}

.flash-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #ef4444;
}

.flash-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  opacity: 0.6;
  padding: 0 4px;
  margin-left: 12px;
  transition: opacity var(--transition-fast);
}

.flash-close:hover {
  opacity: 1;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.main-content {
  padding-top: calc(var(--header-height) + var(--space-8));
  padding-left: 4%;
  padding-right: 4%;
  padding-bottom: var(--space-16);
  min-height: 100vh;
  max-width: var(--container-xl);
  margin: 0 auto;
}

/* ============================================
   MOBILE BOTTOM NAVIGATION
   ============================================ */

.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: var(--color-neutral-0);
  border-top: 1px solid var(--color-neutral-200);
  padding: var(--space-2) 0;
  padding-bottom: calc(var(--space-2) + env(safe-area-inset-bottom, 0px));
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

/* Mobile redesign §1: idle tabs use --text-muted (#7B8285); active keeps
   --color-primary-600 (#25566C) per the approved bottom-nav spec. */
.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  flex: 1;
  padding: var(--space-1) var(--space-2);
  text-decoration: none;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: var(--font-medium);
  transition: color var(--transition-fast);
}

.mobile-nav-item i {
  font-size: 20px;
  transition: transform var(--transition-fast);
}

.mobile-nav-item:hover {
  color: var(--color-primary-500);
}

.mobile-nav-item.active {
  color: var(--color-primary-600);
}

.mobile-nav-item.active i {
  transform: scale(1.1);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  max-width: 400px;
  background: var(--color-neutral-800);
  color: var(--color-neutral-0);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  pointer-events: auto;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  background: var(--color-secondary-600);
}

.toast.error {
  background: var(--color-error);
}

.toast.warning {
  background: var(--color-warning);
}

.toast.info {
  background: var(--color-info);
}

.toast-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
}

.toast-close {
  padding: 4px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.toast-close:hover {
  color: white;
}

/* ============================================
   SKELETON LOADING
   ============================================ */

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-neutral-200) 25%,
    var(--color-neutral-100) 50%,
    var(--color-neutral-200) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 16px;
  margin-bottom: 8px;
}

.skeleton-text.short { width: 60%; }
.skeleton-text.medium { width: 80%; }

.skeleton-title {
  height: 24px;
  width: 70%;
  margin-bottom: 12px;
}

.skeleton-card {
  height: 200px;
  border-radius: var(--radius-lg);
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

.skeleton-button {
  height: 40px;
  width: 120px;
  border-radius: var(--radius-lg);
}

.skeleton-image {
  width: 100%;
  height: 160px;
  border-radius: var(--radius-lg);
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.animate-fadeIn { animation: fadeIn 0.3s ease-out; }
.animate-fadeInUp { animation: fadeInUp 0.4s ease-out; }
.animate-fadeInDown { animation: fadeInDown 0.4s ease-out; }
.animate-scaleIn { animation: scaleIn 0.3s ease-out; }
.animate-slideInRight { animation: slideInRight 0.3s ease-out; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

/* Card hover effects */
.card-hover {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card-hover:hover {
  /* Prompt 42 PR #24: shadow change without translateY bounce. */
  box-shadow: var(--shadow-card-hover);
}

/* Click feedback */
.click-feedback {
  transition: transform 0.1s ease;
}

.click-feedback:active {
  transform: scale(0.97);
}

/* ============================================
   HELP TOOLTIP
   ============================================ */

.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  margin-left: 6px;
  border-radius: var(--radius-full);
  background: var(--color-neutral-200);
  color: var(--color-neutral-500);
  font-size: 11px;
  font-weight: var(--font-bold);
  cursor: help;
  position: relative;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.help-icon:hover {
  background: var(--color-primary-100);
  color: var(--color-primary-600);
}

.help-tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-tooltip);
  width: max-content;
  max-width: 250px;
  padding: 10px 14px;
  background: var(--color-neutral-800);
  color: var(--color-neutral-0);
  font-size: 12px;
  font-weight: var(--font-normal);
  line-height: 1.5;
  text-align: left;
  white-space: normal;
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
}

.help-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-neutral-800);
}

.help-icon:hover .help-tooltip {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   FEEDBACK BUTTON & MODAL
   ============================================ */

.feedback-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: var(--z-popover);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: var(--radius-full);
  /* Prompt 42 PR #24: flat brand fill, controlled shadow. */
  background: var(--brand-primary);
  color: #FFFFFF;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.feedback-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 24px rgba(239, 68, 68, 0.4);
}

.feedback-fab:active {
  transform: scale(0.95);
}

.feedback-fab svg {
  width: 24px;
  height: 24px;
}

.feedback-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.feedback-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.feedback-modal {
  width: 90%;
  max-width: 420px;
  padding: 28px;
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  transform: translateY(20px) scale(0.95);
  transition: transform var(--transition-base);
}

.feedback-modal-overlay.show .feedback-modal {
  transform: translateY(0) scale(1);
}

.feedback-modal h3 {
  font-family: var(--font-display);
  font-size: 22px;
  margin-bottom: 8px;
  color: var(--color-neutral-800);
}

.feedback-modal .subtitle {
  color: var(--color-neutral-500);
  font-size: 14px;
  margin-bottom: 20px;
}

.feedback-rating {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}

.rating-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-full);
  background: var(--bg-secondary);
  font-size: 20px;
  cursor: pointer;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.rating-btn:hover {
  border-color: var(--color-primary-400);
  transform: scale(1.1);
}

.rating-btn.selected {
  border-color: var(--color-primary-500);
  background: var(--color-primary-50);
}

.feedback-textarea {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  font-family: var(--font-body);
  font-size: 14px;
  resize: vertical;
  margin-bottom: 16px;
  transition: border-color var(--transition-fast);
}

.feedback-textarea:focus {
  outline: none;
  border-color: var(--color-primary-400);
}

.feedback-page-context {
  font-size: 12px;
  color: var(--color-neutral-400);
  margin-bottom: 16px;
}

.feedback-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.feedback-btn {
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  font-weight: var(--font-medium);
  font-size: 14px;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.feedback-btn-cancel {
  background: transparent;
  border: 1px solid var(--color-neutral-200);
  color: var(--color-neutral-600);
}

.feedback-btn-cancel:hover {
  background: var(--color-neutral-100);
}

.feedback-btn-submit {
  background: var(--color-primary-500);
  border: none;
  color: white;
}

.feedback-btn-submit:hover {
  background: var(--color-primary-600);
}

.feedback-btn-submit:disabled {
  background: var(--color-neutral-300);
  cursor: not-allowed;
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  /* Show mobile bottom nav */
  .mobile-bottom-nav {
    display: flex;
  }

  /* Hide desktop nav elements */
  .nav-tabs {
    display: none;
  }

  .nav-actions {
    display: none;
  }

  /* Adjust logo */
  .logo {
    font-size: var(--text-xl);
  }

  .nav-logo {
    width: 28px;
    height: 28px;
  }

  /* Adjust main content for bottom nav */
  .main-content {
    padding-left: 3%;
    padding-right: 3%;
    padding-bottom: calc(80px + var(--space-8));
  }

  /* Move toast above bottom nav */
  .toast-container {
    bottom: 80px;
  }

  /* Move feedback FAB above bottom nav */
  .feedback-fab {
    bottom: 80px;
    right: 16px;
    width: 48px;
    height: 48px;
  }

  .feedback-fab svg {
    width: 20px;
    height: 20px;
  }

  .feedback-modal {
    padding: 20px;
  }
}