/* ==========================================================================
   NEARBY CHAT — UI COMPONENTS
   ========================================================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  cursor: pointer;
  user-select: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-inverse);
}
.btn-primary:hover {
  background-color: var(--primary-hover);
  color: var(--text-inverse);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--bg-subtle);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--text-inverse);
}
.btn-accent:hover {
  background-color: var(--accent-hover);
}

.btn-danger {
  background-color: var(--error);
  color: var(--text-inverse);
}
.btn-danger:hover {
  background-color: #dc2626;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-icon:hover {
  background-color: var(--bg-subtle);
  color: var(--text-primary);
}

/* Form Inputs */
.form-group {
  margin-bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-word;
}

.input-field {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.75rem 1rem;
  font-size: var(--text-sm);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  box-sizing: border-box;
}

.input-field:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.input-field::placeholder {
  color: var(--text-muted);
}

.select-field {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  min-width: 0;
}

.checkbox-field {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* Cards */
.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

@media (max-width: 480px) {
  .card {
    padding: var(--space-4);
  }
}

.card-clickable:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}

/* Avatars */
.avatar-container {
  position: relative;
  display: inline-block;
  flex-shrink: 0;
}

.avatar {
  border-radius: var(--radius-full);
  object-fit: cover;
  background-color: var(--bg-subtle);
  border: 2px solid var(--bg-surface);
}

.avatar-xs { width: 28px; height: 28px; }
.avatar-sm { width: 36px; height: 36px; }
.avatar-md { width: 48px; height: 48px; }
.avatar-lg { width: 64px; height: 64px; }
.avatar-xl { width: 96px; height: 96px; }

.status-dot {
  position: absolute;
  bottom: 2px;
  right: 2px;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 2px solid var(--bg-surface);
}
.status-dot.online { background-color: var(--online); }
.status-dot.offline { background-color: var(--offline); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.5rem;
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
}

.badge-primary { background-color: var(--primary-light); color: var(--primary); }
.badge-accent { background-color: var(--accent-light); color: var(--accent); }
.badge-success { background-color: var(--success-bg); color: var(--success-text); }
.badge-warning { background-color: var(--warning-bg); color: var(--warning-text); }
.badge-danger { background-color: var(--error-bg); color: var(--error-text); }
.badge-count {
  background-color: var(--primary);
  color: var(--text-inverse);
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  font-size: 11px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-4);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  max-width: 480px;
  width: 100%;
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  transform: scale(0.95);
  transition: transform var(--transition-fast);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* Drawer Menu (Top-Left Hamburger) */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.drawer-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 300px;
  background-color: var(--bg-surface);
  z-index: 950;
  box-shadow: var(--shadow-xl);
  transform: translateX(-100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.drawer.active {
  transform: translateX(0);
}

.drawer-header {
  padding: var(--space-5);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.drawer-nav {
  padding: var(--space-4) 0;
  flex: 1;
  overflow-y: auto;
}

.drawer-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  color: var(--text-primary);
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

.drawer-link:hover {
  background-color: var(--bg-subtle);
  color: var(--primary);
}

.drawer-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-color);
}

/* Toasts */
.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 380px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  animation: toastSlideIn 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.toast.toast-success { border-left: 4px solid var(--success); }
.toast.toast-error { border-left: 4px solid var(--error); }
.toast.toast-info { border-left: 4px solid var(--info); }
.toast.toast-warning { border-left: 4px solid var(--warning); }

@keyframes toastSlideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Empty States */
.empty-state {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.empty-icon {
  width: 64px;
  height: 64px;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-2);
}

/* Loading Skeleton */
.skeleton {
  background: linear-gradient(90deg, #f1f5f9 25%, #e2e8f0 50%, #f1f5f9 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

/* Discover People Carousel */
.discover-carousel {
  display: flex;
  gap: var(--space-3);
  overflow-x: auto;
  padding: 4px 2px var(--space-3);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.discover-carousel::-webkit-scrollbar {
  display: none;
}

.discover-card {
  flex: 0 0 230px;
  min-width: 210px;
  max-width: 250px;
  scroll-snap-align: start;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.discover-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

@media (max-width: 480px) {
  .discover-card {
    flex: 0 0 72vw;
    min-width: 200px;
    max-width: 260px;
  }
}