.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--md-radius-full);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.25rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition-standard);
  min-height: 48px;
  min-width: 48px;
  -webkit-tap-highlight-color: transparent;
}

.btn .material-icons-round { font-size: 20px; }

.btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: 0 1px 3px rgba(103, 80, 164, 0.3);
}

.btn-filled:hover {
  box-shadow: 0 4px 8px rgba(103, 80, 164, 0.4);
  transform: translateY(-1px);
  color: var(--md-on-primary);
}

.btn-filled:active { transform: translateY(0); box-shadow: 0 1px 3px rgba(103, 80, 164, 0.3); }

.btn-tonal {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.btn-tonal:hover { background: var(--md-surface-container-high); color: var(--md-on-primary-container); }

.btn-outlined {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}

.btn-outlined:hover { background: var(--md-primary-container); }

.btn-text {
  background: transparent;
  color: var(--md-primary);
  padding: 8px 16px;
  min-height: 40px;
}

.btn-text:hover { background: var(--md-primary-container); }

.btn-secondary {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
  box-shadow: 0 1px 3px rgba(0, 107, 94, 0.3);
}

.btn-secondary:hover {
  box-shadow: 0 4px 8px rgba(0, 107, 94, 0.4);
  transform: translateY(-1px);
  color: var(--md-on-secondary);
}

.btn-danger {
  background: var(--md-error);
  color: var(--md-on-error);
}

.btn-danger:hover { background: #9B1F17; color: var(--md-on-error); }

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
  border-radius: var(--md-radius-xl);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8125rem;
  min-height: 36px;
}

.btn-block { width: 100%; }

.card {
  background: var(--md-surface-container-low);
  border-radius: var(--md-radius-xl);
  padding: 24px;
  transition: all var(--transition-standard);
  border: 1px solid var(--md-outline-variant);
}

.card:hover {
  border-color: var(--md-primary);
  box-shadow: 0 2px 8px var(--md-shadow);
}

.card-elevated {
  box-shadow: 0 1px 3px var(--md-shadow), 0 4px 12px rgba(0,0,0,0.08);
  border: none;
}

.card-elevated:hover {
  box-shadow: 0 4px 12px var(--md-shadow), 0 8px 24px rgba(0,0,0,0.12);
  transform: translateY(-2px);
}

.card-product {
  position: relative;
  overflow: hidden;
}

.card-product .product-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  padding: 4px 12px;
  border-radius: var(--md-radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.card-product .product-popular {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--md-primary);
  color: var(--md-on-primary);
  padding: 4px 12px;
  border-radius: var(--md-radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.card-product .product-form-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--md-surface-container);
  padding: 4px 12px;
  border-radius: var(--md-radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  margin-bottom: 8px;
}

.card-product h3 {
  font-size: 1.125rem;
  margin-bottom: 4px;
  line-height: 1.3;
}

.card-product .product-concentration {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 12px;
}

.card-product .product-description {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-product .pricing-tiers {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.pricing-tier {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--md-surface-container);
  border-radius: var(--md-radius-md);
  cursor: pointer;
  transition: all var(--transition-standard);
  border: 2px solid transparent;
}

.pricing-tier:hover, .pricing-tier.selected {
  border-color: var(--md-primary);
  background: var(--md-primary-container);
}

.pricing-tier.best-value {
  border-color: var(--md-secondary);
  background: var(--md-secondary-container);
}

.pricing-tier .tier-label {
  font-weight: 600;
  font-size: 0.875rem;
}

.pricing-tier .tier-price {
  text-align: right;
}

.pricing-tier .tier-original {
  text-decoration: line-through;
  color: var(--md-on-surface-variant);
  font-size: 0.75rem;
}

.pricing-tier .tier-current {
  font-weight: 700;
  font-size: 1rem;
  color: var(--md-on-surface);
}

.pricing-tier .tier-savings {
  font-size: 0.75rem;
  color: var(--md-secondary);
  font-weight: 600;
}

.pricing-tier .tier-per-month {
  font-size: 0.75rem;
  color: var(--md-on-surface-variant);
}

.best-value-tag {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--md-radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-product .product-cta {
  margin-top: 8px;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-on-surface);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--md-radius-md);
  border: 1px solid var(--md-outline);
  background: var(--md-surface-container-lowest);
  color: var(--md-on-surface);
  font-size: 1rem;
  transition: all var(--transition-standard);
  -webkit-appearance: none;
}

.form-input:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px var(--md-primary-container);
}

.form-input::placeholder {
  color: var(--md-outline);
}

.form-input:hover {
  border-color: var(--md-on-surface-variant);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--md-on-surface-variant);
  margin-top: 4px;
}

.form-error {
  font-size: 0.75rem;
  color: var(--md-error);
  margin-top: 4px;
}

.form-input.is-error {
  border-color: var(--md-error);
}

textarea.form-input {
  min-height: 120px;
  resize: vertical;
}

select.form-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M7 10l5 5 5-5z' fill='%2379747E'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--md-radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-success { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.badge-warning { background: var(--md-tertiary-container); color: var(--md-on-surface); }
.badge-danger { background: var(--md-error-container); color: var(--md-error); }
.badge-info { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.badge-secondary { background: var(--md-surface-container-high); color: var(--md-on-surface-variant); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--md-radius-full);
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--md-surface-container);
  color: var(--md-on-surface-variant);
  border: 1px solid var(--md-outline-variant);
  cursor: pointer;
  transition: all var(--transition-standard);
}

.chip:hover {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: var(--md-primary);
}

.chip .material-icons-round { font-size: 16px; }

.tab-bar {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  border-bottom: 1px solid var(--md-outline-variant);
  margin-bottom: 1.5rem;
  -ms-overflow-style: none;
}

.tab-bar::-webkit-scrollbar { display: none; }

.tab-item {
  padding: 12px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-standard);
  text-decoration: none;
  flex-shrink: 0;
}

.tab-item:hover { color: var(--md-primary); }
.tab-item.active { color: var(--md-primary); border-bottom-color: var(--md-primary); }

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--md-surface-container-highest);
  border-radius: var(--md-radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--md-primary);
  border-radius: var(--md-radius-full);
  transition: width var(--transition-emphasized);
}

.progress-bar-fill.success {
  background: var(--md-secondary);
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--md-radius-full);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.chat-bubble {
  max-width: 80%;
  padding: 12px 16px;
  border-radius: var(--md-radius-lg);
  font-size: 0.9375rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.chat-bubble.sent {
  background: var(--md-primary);
  color: var(--md-on-primary);
  margin-left: auto;
  border-bottom-right-radius: 4px;
}

.chat-bubble.received {
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  margin-right: auto;
  border-bottom-left-radius: 4px;
}

.chat-time {
  font-size: 0.6875rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 12px;
}

.chat-input-container {
  display: flex;
  gap: 8px;
  padding: 12px 16px;
  background: var(--md-surface-container-lowest);
  border-top: 1px solid var(--md-outline-variant);
  position: sticky;
  bottom: 0;
}

.chat-input {
  flex: 1;
  padding: 12px 16px;
  border-radius: var(--md-radius-xl);
  border: 1px solid var(--md-outline);
  background: var(--md-surface-container-low);
  font-size: 0.9375rem;
  color: var(--md-on-surface);
}

.chat-input:focus {
  outline: none;
  border-color: var(--md-primary);
}

.timeline-item {
  display: flex;
  gap: 16px;
  padding-bottom: 24px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 17px;
  top: 36px;
  bottom: 0;
  width: 2px;
  background: var(--md-outline-variant);
}

.timeline-item:last-child::before { display: none; }

.timeline-dot {
  width: 36px;
  height: 36px;
  border-radius: var(--md-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--md-surface-container);
  color: var(--md-on-surface-variant);
}

.timeline-dot.completed {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
}

.timeline-dot.active {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.timeline-content h4 {
  font-size: 0.9375rem;
  margin-bottom: 2px;
}

.timeline-content p {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  margin-bottom: 0;
}

.stat-card {
  background: var(--md-surface-container-low);
  border-radius: var(--md-radius-xl);
  padding: 20px;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--md-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8125rem;
  color: var(--md-on-surface-variant);
  font-weight: 500;
  margin-top: 4px;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--md-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  margin-bottom: 8px;
}

.admin-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--md-surface-container);
  border-right: 1px solid var(--md-outline-variant);
  padding: 16px;
  overflow-y: auto;
  z-index: 1001;
}

.admin-main {
  margin-left: 260px;
  padding: 24px;
  min-height: 100vh;
}

@media (max-width: 1023px) {
  .admin-sidebar { display: none; }
  .admin-main { margin-left: 0; }
}

.admin-sidebar .admin-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--md-primary);
  margin-bottom: 24px;
  padding: 8px;
}

.admin-sidebar a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--md-radius-md);
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-standard);
  text-decoration: none;
}

.admin-sidebar a:hover {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.admin-sidebar a.active {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.admin-sidebar a .material-icons-round { font-size: 20px; }

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.admin-header h1 {
  font-size: 1.5rem;
}

.admin-stat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

@media (min-width: 768px) {
  .admin-stat-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .admin-stat-grid { grid-template-columns: repeat(4, 1fr); }
}

.admin-table-wrap {
  overflow-x: auto;
  border-radius: var(--md-radius-lg);
  border: 1px solid var(--md-outline-variant);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.admin-table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--md-surface-container);
  font-weight: 600;
  color: var(--md-on-surface);
  border-bottom: 1px solid var(--md-outline-variant);
  white-space: nowrap;
}

.admin-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface-variant);
}

.admin-table tr:last-child td {
  border-bottom: none;
}

.admin-table tr:hover td {
  background: var(--md-surface-container-low);
}

.doctor-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 260px;
  background: var(--md-surface-container);
  border-right: 1px solid var(--md-outline-variant);
  padding: 16px;
  overflow-y: auto;
  z-index: 1001;
}

.doctor-main {
  margin-left: 260px;
  padding: 24px;
  min-height: 100vh;
}

@media (max-width: 1023px) {
  .doctor-sidebar { display: none; }
  .doctor-main { margin-left: 0; }
}

.payment-option-card {
  border: 2px solid var(--md-outline-variant);
  border-radius: var(--md-radius-xl);
  padding: 24px;
  cursor: pointer;
  transition: all var(--transition-standard);
}

.payment-option-card:hover {
  border-color: var(--md-primary);
  box-shadow: 0 4px 12px rgba(103, 80, 164, 0.15);
}

.payment-option-card.selected {
  border-color: var(--md-primary);
  background: var(--md-primary-container);
}

.step-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 2rem;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: var(--md-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: 600;
  background: var(--md-surface-container);
  color: var(--md-on-surface-variant);
}

.step.active .step-number {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.step.completed .step-number {
  background: var(--md-secondary);
  color: var(--md-on-secondary);
}

.step-connector {
  width: 40px;
  height: 2px;
  background: var(--md-outline-variant);
}

.step-connector.active {
  background: var(--md-primary);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-content {
  background: var(--md-surface-container-lowest);
  border-radius: var(--md-radius-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.modal-close {
  width: 40px;
  height: 40px;
  border-radius: var(--md-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--md-on-surface-variant);
  cursor: pointer;
}

.modal-close:hover { background: var(--md-surface-container); }