*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --success: #22c55e;
  --warning: #f59e0b;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-hover: #f1f5f9;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Landing / Auth pages */
.page-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  text-align: center;
  padding: 80px 20px 60px;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: var(--text);
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  padding: 40px 0 80px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-card h3 {
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
  text-decoration: none;
}

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

.btn-secondary:hover {
  background: var(--surface-hover);
  text-decoration: none;
}

.btn-danger {
  background: var(--danger);
  color: white;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-google {
  background: white;
  color: #333;
  border: 1px solid var(--border);
  font-weight: 500;
}

.btn-google:hover {
  background: var(--surface-hover);
}

/* Auth forms */
.auth-container {
  max-width: 420px;
  margin: 60px auto;
  padding: 0 20px;
}

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.auth-card h2 {
  text-align: center;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 4px;
  font-weight: 500;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.15s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-footer {
  text-align: center;
  margin-top: 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.error-msg {
  background: #fef2f2;
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.9rem;
  display: none;
}

.error-msg.visible {
  display: block;
}

/* App layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 280px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sidebar-header h2 {
  font-size: 1.1rem;
}

.sidebar-user {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.85rem;
  overflow: hidden;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.nav-section {
  margin-bottom: 8px;
}

.nav-section-title {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 8px 12px 4px;
  font-weight: 600;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  transition: background 0.15s;
}

.nav-item:hover {
  background: var(--surface-hover);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

.nav-item .badge {
  margin-left: auto;
  background: var(--danger);
  color: white;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 10px;
  font-weight: 600;
}

.sidebar-footer {
  padding: 12px;
  border-top: 1px solid var(--border);
}

/* Main content */
.main-content {
  flex: 1;
  overflow-y: auto;
  min-width: 0;
}

.content-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.content-header h1 {
  font-size: 1.3rem;
}

.content-body {
  padding: 24px;
  max-width: 900px;
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.card-title {
  font-weight: 600;
  font-size: 1rem;
}

/* Gift items */
.gift-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.gift-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s;
}

.gift-item:hover {
  border-color: var(--primary);
}

.gift-item.claimed {
  opacity: 0.7;
  background: #f0fdf4;
  border-color: var(--success);
}

.gift-priority {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}

.priority-really_want {
  background: #fef2f2;
  color: var(--danger);
}

.priority-want {
  background: #eff6ff;
  color: #3b82f6;
}

.priority-nice_to_have {
  background: #f0fdf4;
  color: var(--success);
}

.gift-info {
  flex: 1;
  min-width: 0;
}

.gift-name {
  font-weight: 500;
  margin-bottom: 2px;
}

.gift-name a {
  color: var(--text);
}

.gift-name a:hover {
  color: var(--primary);
}

.gift-notes {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.gift-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

.claim-badge {
  font-size: 0.8rem;
  color: var(--success);
  font-weight: 500;
}

/* Member list */
.member-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.member-item:last-child {
  border-bottom: none;
}

.member-role {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

/* Invite card */
.invite-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

.invite-info h4 {
  margin-bottom: 2px;
}

.invite-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.invite-actions {
  display: flex;
  gap: 8px;
}

/* Group member wishlists */
.member-wishlist {
  margin-bottom: 24px;
}

.member-wishlist-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.member-wishlist-header h3 {
  font-size: 1rem;
}

.member-wishlist-header .tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 480px;
  box-shadow: var(--shadow-md);
}

.modal h3 {
  margin-bottom: 16px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state h3 {
  margin-bottom: 8px;
  color: var(--text);
}

/* Invite code display */
.invite-code-display {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-family: monospace;
  font-size: 1.1rem;
  text-align: center;
  cursor: pointer;
  user-select: all;
  margin: 12px 0;
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  box-shadow: var(--shadow-md);
  min-width: 280px;
  animation: slideIn 0.2s ease;
}

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

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

/* Responsive */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sidebar-nav {
    max-height: 200px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}