/**
 * Component Library
 * Reusable UI components for the medical website
 */

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-tight);
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  user-select: none;
  min-height: 48px; /* WCAG AAA compliant touch target */
  position: relative;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent; /* Remove blue highlight on mobile tap */
}

/* Active state for better touch feedback on mobile */
.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button Variants */
.btn-primary {
  background-color: var(--color-primary-600);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-700);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: var(--color-secondary-600);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-secondary-700);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-700);
  color: var(--color-primary-700);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-primary-600);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-primary-50);
}

.btn-whatsapp {
  background-color: #25d366;
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-md);
}

.btn-whatsapp:hover:not(:disabled) {
  background-color: #128c7e;
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 44px; /* Still touch-friendly */
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-lg);
  min-height: 56px; /* Larger for emphasis on mobile */
}

.btn-full {
  width: 100%;
}

/* Button Icon */
.btn-icon {
  width: 56px; /* Increased from 44px to 56px for better thumb-zone */
  height: 56px;
  padding: 0;
  border-radius: var(--radius-full);
}

@media (max-width: 767px) {
  .btn-icon {
    width: 60px;
    height: 60px; /* Even larger on mobile for easier tapping */
  }
}

/* ========================================
   CARDS
   ======================================== */

.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: var(--space-6);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.card-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-light);
}

/* Service Card Variant */
.card-service {
  text-align: center;
  padding: var(--space-8);
  background: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-bg-primary) 100%);
  border: 2px solid var(--color-border-light);
}

.card-service-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-100);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

/* ========================================
   BADGES
   ======================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background-color: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-secondary {
  background-color: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-success);
}

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

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

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

.navbar {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
}

.navbar-logo {
  height: 40px;
  width: auto;
}

.navbar-menu {
  display: none;
  list-style: none;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
}

@media (min-width: 1024px) {
  .navbar-menu {
    display: flex;
  }
}

.navbar-link {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-primary-600);
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary-600);
  transition: width var(--transition-base);
}

.navbar-link:hover::after,
.navbar-link.active::after {
  width: 100%;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.navbar-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .navbar-toggle {
    display: none;
  }
}

.navbar-toggle-bar {
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: all var(--transition-base);
}

.navbar-toggle.active .navbar-toggle-bar:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active .navbar-toggle-bar:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active .navbar-toggle-bar:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu */
.navbar-mobile {
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-fixed);
  max-height: calc(100vh - 73px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-base), opacity var(--transition-base), visibility 0s var(--transition-base);
}

.navbar-mobile.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform var(--transition-base), opacity var(--transition-base), visibility 0s;
}

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

.navbar-mobile-menu {
  list-style: none;
  padding: var(--space-2) 0 calc(var(--space-8) + env(safe-area-inset-bottom));
}

.navbar-mobile-item {
  border-bottom: 1px solid var(--color-border-light);
}

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

.navbar-mobile-link {
  display: flex;
  align-items: center;
  padding: var(--space-5) var(--space-6);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  min-height: 60px; /* Even better touch target */
  -webkit-tap-highlight-color: transparent;
}

.navbar-mobile-link:hover,
.navbar-mobile-link.active {
  color: var(--color-primary-600);
  background-color: var(--color-primary-50);
}

.navbar-mobile-link:active {
  background-color: var(--color-primary-100);
  transform: scale(0.98);
}

/* Mobile menu backdrop */
.navbar-mobile-backdrop {
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-fixed) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility 0s var(--transition-base);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.navbar-mobile-backdrop.active {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--transition-base), visibility 0s;
}

/* ========================================
   FORMS
   ======================================== */

.form-group {
  margin-bottom: var(--space-6);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.form-label-required::after {
  content: '*';
  color: var(--color-error);
  margin-left: var(--space-1);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-family: var(--font-family-primary);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 2px solid var(--color-border-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  min-height: 48px; /* WCAG AAA compliant touch target */
  -webkit-appearance: none; /* Remove default iOS styling */
  -moz-appearance: none;
  appearance: none;
}

/* Larger font size on mobile to prevent zoom */
@media (max-width: 767px) {
  .form-input,
  .form-textarea,
  .form-select {
    font-size: 16px; /* Prevents iOS zoom on focus */
    padding: var(--space-4);
    min-height: 52px;
  }
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* Better visual feedback on mobile touch */
.form-input:active,
.form-textarea:active,
.form-select:active {
  border-color: var(--color-primary-400);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-tertiary);
}

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

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
  background-color: var(--color-bg-tertiary);
  cursor: not-allowed;
  opacity: 0.6;
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--color-error);
}

.form-input.success,
.form-textarea.success,
.form-select.success {
  border-color: var(--color-success);
}

.form-help {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-2);
}

.form-error {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-error);
  margin-top: var(--space-2);
}

.form-success {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-success);
  margin-top: var(--space-2);
}

/* Checkbox & Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.form-check-input {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.form-check-label {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  cursor: pointer;
}

/* ========================================
   ALERTS
   ======================================== */

.alert {
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  margin-bottom: var(--space-6);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-light);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert-error {
  background-color: var(--color-error-light);
  border-color: var(--color-error);
  color: var(--color-error);
}

.alert-info {
  background-color: var(--color-info-light);
  border-color: var(--color-info);
  color: var(--color-info);
}

/* ========================================
   SECTIONS
   ======================================== */

.section {
  padding: var(--space-16) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-24) 0;
  }
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-subtitle {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: var(--container-3xl);
  margin: 0 auto;
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-section-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-4);
  color: var(--color-text-inverse);
}

.footer-links {
  list-style: none;
}

.footer-link {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-neutral-300);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text-inverse);
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-neutral-700);
  text-align: center;
  color: var(--color-neutral-400);
  font-size: var(--font-size-sm);
}

/* ========================================
   STICKY CTA
   ======================================== */

.sticky-cta {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-4);
  z-index: var(--z-fixed);
  animation: pulse 2s infinite;
  /* Safe area support for notched devices */
  bottom: calc(var(--space-6) + env(safe-area-inset-bottom));
  right: calc(var(--space-4) + env(safe-area-inset-right));
}

@media (min-width: 768px) {
  .sticky-cta {
    bottom: var(--space-8);
    right: var(--space-8);
    bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
    right: calc(var(--space-8) + env(safe-area-inset-right));
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.6);
  }
}

/* Sticky CTA button optimizations */
.sticky-cta .btn-icon {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.sticky-cta .btn-icon:active {
  transform: scale(0.95);
}

/* ========================================
   LOADING STATES
   ======================================== */

.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: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

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

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-neutral-200);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  animation: spinner-rotate 1s linear infinite;
}

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