:root {
  --primary: #7047EB;
  --primary-light: #9173FF;
  --primary-dark: #4B22DC;
  --text-primary: #1F1F1F;
  --text-secondary: #5E5E5E;
  --text-light: #FFFFFF;
  --background: #F9FAFC;
  --card-bg: #FFFFFF;
  --border: #E2E5EF;
  --success: #38CB89;
  --warning: #FFBB38;
  --danger: #FF5A5A;
  --modal-bg: rgba(17, 17, 17, 0.85);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #9173FF;
    --primary-light: #B79EFF;
    --primary-dark: #6E47EB;
    --text-primary: #F5F5F5;
    --text-secondary: #B4B4B4;
    --text-light: #FFFFFF;
    --background: #121214;
    --card-bg: #1E1E21;
    --border: #2A2A2E;
    --modal-bg: rgba(0, 0, 0, 0.9);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.35);
  }
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  background-color: var(--card-bg);
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  position: relative;
}

.site-logo svg {
  height: 38px;
  width: auto;
  color: var(--primary);
  transition: var(--transition);
}

.site-logo svg:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 8px rgba(112, 71, 235, 0.5));
}

/* Button Styles */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  letter-spacing: 0.01em;
  margin-right: 0.5rem;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(112, 71, 235, 0.3);
}

.button:active {
  transform: translateY(0);
}

.button.secondary {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text-primary);
}

.button.secondary:hover {
  background: rgba(112, 71, 235, 0.1);
  border-color: var(--primary-light);
  color: var(--primary);
}

.button.danger {
  background: linear-gradient(135deg, var(--danger), #FF7878);
}

.button.danger:hover {
  box-shadow: 0 5px 15px rgba(255, 90, 90, 0.3);
}

.button.warning {
  background: linear-gradient(135deg, var(--warning), #FFD280);
}

/* Profile Section Styles */
.profile-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.profile-section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.profile-header {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
}

.profile-avatar {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.75rem;
  margin-right: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(112, 71, 235, 0.3);
  transition: var(--transition);
}

.profile-avatar:hover {
  transform: scale(1.05);
}

/* Stats Grid Styles */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.stat-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

/* Reading Stats Styles */
.reading-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.reading-stats-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.reading-stats-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

.reading-stats-card h3 {
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.reading-stats-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-bg);
  z-index: 1000;
  backdrop-filter: blur(8px);
}

.modal-content {
  position: relative;
  max-width: 550px;
  margin: 2.5rem auto;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalOpen 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
  border: 1px solid var(--border);
}

.modal-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

@keyframes modalOpen {
  from { 
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Export/Import Section Styles */
.export-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.export-section:hover {
  transform: translateY(-3px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

/* Danger Zone Styles */
.danger-zone {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--danger);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.danger-zone:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 90, 90, 0.15);
}

.danger-zone h3 {
  color: var(--danger);
}

.danger-buttons {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

/* Import Success Popup */
#importSuccessPopup {
  display: none;
  position: fixed;
  top: 20px;
  right: 20px;
  background: linear-gradient(135deg, var(--success), #77E2B3);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: slideIn 0.5s ease;
  z-index: 1001;
}

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

/* Responsive Styles */
@media screen and (max-width: 1024px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media screen and (max-width: 768px) {
  .stats-grid {
    gap: 0.75rem;
  }

  .reading-stats {
    grid-template-columns: 1fr;
  }
  
  .export-section {
    flex-direction: column;
    align-items: stretch;
    gap: 1.25rem;
  }
  
  .export-section div {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .button {
    width: 100%;
    margin-right: 0;
    margin-bottom: 0.5rem;
  }
  
  .danger-buttons {
    flex-direction: column;
  }
  
  .modal-content {
    margin: 1.5rem;
    width: calc(100% - 3rem);
  }
  
  .profile-header h2 {
    font-size: 1.25rem;
  }
  
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
}

@media screen and (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  
  .stat-card {
    padding: 1rem;
  }
  
  .profile-header {
    flex-direction: column;
    text-align: center;
  }
  
  .profile-avatar {
    margin-right: 0;
    margin-bottom: 1rem;
  }
}

/* Form elements consistent with main style */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(112, 71, 235, 0.15);
}

/* Modal content title styles */
.modal-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--primary);
  position: relative;
  padding-bottom: 0.75rem;
}

.modal-content h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--primary-light));
  border-radius: 2px;
}

/* Add scrollbar styling to match main style */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--card-bg);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--primary-light), var(--primary));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Accessibility focus */
button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Add animations for profile section */
.profile-section {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.4s ease-out forwards;
}

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

.reading-stats-card:nth-child(1) { animation-delay: 0.1s; }
.reading-stats-card:nth-child(2) { animation-delay: 0.2s; }