/* Base styles */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu,
    Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  --color-primary: #0284c7;
  --color-primary-dark: #0369a1;
  --color-primary-light: #38bdf8;
  --color-text: #111827;
  --color-text-light: #4b5563;
  --color-background: #ffffff;
  --color-background-alt: #f9fafb;
  --color-border: #e5e7eb;
  --color-card-bg: #ffffff;
  --color-card-shadow: rgba(0, 0, 0, 0.1);
  --color-error: #ef4444;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-info: #3b82f6;
  --color-danger: #dc2626;
  
  /* Legacy variable names for compatibility */
  --primary-color: #0284c7;
  --primary-color-dark: #0369a1;
  --primary-color-light: #38bdf8;
}

.dark {
  --color-primary: #38bdf8;
  --color-primary-dark: #0ea5e9;
  --color-primary-light: #7dd3fc;
  --color-text: #f9fafb;
  --color-text-light: #d1d5db;
  --color-background: #111827;
  --color-background-alt: #1f2937;
  --color-border: #374151;
  --color-card-bg: #1f2937;
  --color-card-shadow: rgba(0, 0, 0, 0.3);
  --color-error: #f87171;
  --color-success: #34d399;
  --color-warning: #fbbf24;
  --color-info: #60a5fa;
  --color-danger: #ef4444;
  
  /* Legacy variable names for compatibility */
  --primary-color: #38bdf8;
  --primary-color-dark: #0ea5e9;
  --primary-color-light: #7dd3fc;
}

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

html {
  font-family: var(--font-sans);
}

body {
  color: var(--color-text);
  background-color: var(--color-background);
  line-height: 1.5;
  transition: background-color 0.3s, color 0.3s;
}

.hidden {
  display: none;
}

/* Layout */
.min-h-screen {
  min-height: 100vh;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.text-center {
  text-align: center;
}

/* Header */
.header {
  background-color: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  box-shadow: 0 1px 3px var(--color-card-shadow);
}

.header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: bold;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-link {
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 0.2s;
}

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

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-background-alt);
  border: none;
  border-radius: 9999px;
  padding: 0.5rem;
  cursor: pointer;
  color: var(--color-text-light);
}

.icon {
  width: 1.25rem;
  height: 1.25rem;
}

.icon-large {
  width: 3rem;
  height: 3rem;
}

/* Main content */
.main {
  flex-grow: 1;
  padding: 2rem 0;
}

.hero-section {
  padding: 3rem 0;
}

.heading-large {
  font-size: 2.5rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.heading-medium {
  font-size: 1.875rem;
  font-weight: bold;
  margin-bottom: 3rem;
  color: var(--color-text);
}

.heading-small {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.text-large {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin-bottom: 2rem;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: background-color 0.2s;
}

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

.button.primary:hover {
  background-color: var(--color-primary-dark);
}

.button.secondary {
  background-color: var(--color-background-alt);
  color: var(--color-text);
}

.button.secondary:hover {
  background-color: var(--color-border);
}

/* Features section */
.features-section {
  padding: 3rem 0;
  background-color: var(--color-background-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background-color: var(--color-card-bg);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px var(--color-card-shadow);
}

.feature-icon {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

/* Footer */
.footer {
  background-color: var(--color-card-bg);
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-light);
}

/* Authentication Styles */
header {
  background-color: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
  box-shadow: 0 1px 3px var(--color-card-shadow);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header .logo h1 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin: 0;
}

header nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

header nav ul li a {
  color: var(--color-text-light);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

header nav ul li a:hover {
  color: var(--color-primary);
}

header nav ul li.active a {
  color: var(--color-primary);
  font-weight: 600;
}

#theme-toggle-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-text-light);
}

.auth-section {
  padding: 3rem 0;
}

.auth-form-container {
  max-width: 32rem;
  margin: 0 auto;
  padding: 2rem;
  background-color: var(--color-card-bg);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px var(--color-card-shadow);
}

.auth-form-container h2 {
  margin-bottom: 1.5rem;
  text-align: center;
  color: var(--color-text);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--color-text);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="tel"] {
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.375rem;
  background-color: var(--color-background);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color 0.2s;
}

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

.error-message {
  color: var(--color-error);
  font-size: 0.875rem;
  display: none;
}

.success-message {
  color: var(--color-success);
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-success);
  border-radius: 0.375rem;
  padding: 1rem;
  margin-bottom: 1.5rem;
}

.remember-forgot {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.remember-forgot a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.875rem;
}

.remember-forgot a:hover {
  text-decoration: underline;
}

.terms {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.terms label {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.terms a {
  color: var(--color-primary);
  text-decoration: none;
}

.terms a:hover {
  text-decoration: underline;
}

.auth-links {
  text-align: center;
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.auth-links a {
  color: var(--color-primary);
  text-decoration: none;
}

.auth-links a:hover {
  text-decoration: underline;
}

.auth-separator {
  display: flex;
  align-items: center;
  text-align: center;
  margin: 0.5rem 0;
}

.auth-separator::before,
.auth-separator::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--color-border);
}

.auth-separator span {
  padding: 0 0.5rem;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: #fff;
  color: #757575;
  border: 1px solid var(--color-border);
}

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

.loader {
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-radius: 50%;
  border-top: 4px solid var(--color-primary);
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  margin: 1rem auto;
}

.btn {
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s;
  font-size: 1rem;
}

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

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

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

.btn-danger:hover {
  background-color: #b91c1c;
}

.btn-small {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

/* Profile Page Styles */
.profile-section {
  padding: 3rem 0;
}

.profile-container {
  max-width: 48rem;
  margin: 0 auto;
  padding: 2rem;
  background-color: var(--color-card-bg);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px var(--color-card-shadow);
}

.profile-container h2 {
  margin-bottom: 2rem;
  color: var(--color-text);
}

.profile-container h3 {
  margin: 2rem 0 1rem;
  color: var(--color-text);
  font-size: 1.25rem;
}

.profile-info {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
}

.profile-avatar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.avatar-placeholder {
  width: 6rem;
  height: 6rem;
  border-radius: 50%;
  background-color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
}

.profile-details {
  flex: 1;
}

.profile-security,
.profile-preferences,
.profile-danger {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.checkbox-group div {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.profile-danger {
  margin-top: 2rem;
}

.profile-danger p {
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: 1rem;
  }
  
  header nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  
  .profile-info {
    flex-direction: column;
    align-items: center;
  }
  
  .profile-details {
    width: 100%;
  }
}

/* PDF Viewer Styles */
.pdf-viewer {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1.5rem;
  background-color: var(--color-background-alt);
  min-height: 400px;
}

.pdf-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding: 0.5rem;
  background-color: var(--color-card-bg);
  border-radius: 0.25rem;
}

.pdf-nav, .pdf-zoom {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pdf-button {
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  font-size: 0.875rem;
}

.pdf-button:hover {
  background-color: var(--color-primary-dark);
}

.pdf-canvas-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.pdf-page-wrapper {
  position: relative;
  margin-bottom: 1rem;
  box-shadow: 0 2px 4px var(--color-card-shadow);
}

.pdf-canvas {
  display: block;
}

.pdf-annotation-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: all;
}

.pdf-annotation {
  position: absolute;
  z-index: 2;
}

.pdf-annotation-marker {
  width: 20px;
  height: 20px;
  background-color: rgba(255, 204, 0, 0.7);
  border: 2px solid rgba(255, 153, 0, 0.8);
  border-radius: 50%;
  cursor: pointer;
}

.pdf-annotation-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  padding: 0.5rem;
  width: 200px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  display: none;
  z-index: 3;
}

.pdf-annotation:hover .pdf-annotation-tooltip {
  display: block;
}

.pdf-annotation.highlight .pdf-annotation-marker {
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.pdf-annotation-delete {
  position: absolute;
  top: 0.25rem;
  right: 0.25rem;
  background: none;
  border: none;
  color: var(--color-text-light);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
}

.pdf-annotation-delete:hover {
  color: var(--color-danger);
}

.pdf-annotations-panel {
  margin-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
}

.pdf-annotations-list {
  margin-bottom: 1rem;
  max-height: 300px;
  overflow-y: auto;
}

.pdf-annotation-page-header {
  font-weight: 600;
  margin: 1rem 0 0.5rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--color-border-light);
}

.pdf-annotation-item {
  padding: 0.5rem;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pdf-annotation-text {
  flex: 1;
}

.pdf-annotation-actions {
  display: flex;
  gap: 0.5rem;
}

.pdf-annotation-goto, .pdf-annotation-delete-btn {
  background: none;
  border: none;
  font-size: 0.75rem;
  color: var(--color-primary);
  cursor: pointer;
  text-decoration: underline;
}

.pdf-annotation-delete-btn {
  color: var(--color-danger);
}

.pdf-no-annotations {
  color: var(--color-text-light);
  font-style: italic;
  text-align: center;
  padding: 1rem;
}

/* Visualization Styles */
.visualization-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.visualization-section {
  margin-bottom: 1.5rem;
}

.chart-container {
  height: 300px;
  position: relative;
}

.visualization-image {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  box-shadow: 0 2px 4px var(--color-card-shadow);
}

.no-data-message {
  text-align: center;
  color: var(--color-text-light);
  font-style: italic;
  padding: 2rem;
}

/* Results Page Styles */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  text-align: center;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 5px solid var(--color-background-alt);
  border-top: 5px solid var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.error-container {
  text-align: center;
  padding: 2rem;
  background-color: var(--color-background-alt);
  border-radius: 0.5rem;
  margin-bottom: 2rem;
}

.error-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.findings-list {
  list-style-type: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.findings-list li {
  margin-bottom: 0.5rem;
}

.detailed-explanation {
  line-height: 1.6;
}

.detailed-explanation p {
  margin-bottom: 1rem;
}

.abnormal-results {
  background-color: rgba(239, 68, 68, 0.1);
  border-left: 4px solid var(--color-danger);
  padding: 1rem;
  border-radius: 0.25rem;
}

.suggested-questions {
  padding-left: 1.5rem;
}

.suggested-questions li {
  margin-bottom: 0.75rem;
}

.annotations-container {
  background-color: var(--color-background-alt);
  border-radius: 0.5rem;
  padding: 1rem;
}

#no-annotations-message {
  text-align: center;
  color: var(--color-text-light);
  font-style: italic;
}

/* Share Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 100;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  overflow: auto;
}

.modal-content {
  background-color: var(--color-card-bg);
  margin: 10% auto;
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px var(--color-card-shadow);
  max-width: 600px;
  position: relative;
}

.close-button {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-text-light);
  cursor: pointer;
}

.close-button:hover {
  color: var(--color-text);
}

.share-options {
  margin-top: 1.5rem;
}

.share-option {
  margin-bottom: 1.5rem;
}

.share-link-container {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.share-link-container input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
}

.email-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.email-form input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
}

/* Upload Page Styles */
.upload-hint {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: 0.5rem;
}

/* Button Styles */
.button.tertiary {
  background-color: var(--color-background-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.button.tertiary:hover {
  background-color: var(--color-border-light);
}