body[data-theme="dark"] {
  --bg-primary: #0a0a0f;
  --bg-secondary: #1a1a2e;
  --bg-card: #16213e;
  --text-primary: #e0e0e0;
  --text-secondary: #b0b0b0;
  --accent-primary: #9370db;
  --accent-secondary: #6a5acd;
  --accent-hover: #8a7fd9;
  --border-color: #2d2d44;
  --error-color: #ff6b6b;
  --success-color: #51cf66;
  --warning-color: #ffd43b;
}

body[data-theme="light"] {
  --bg-primary: #f5f5f5;
  --bg-secondary: #ffffff;
  --bg-card: #fafafa;
  --text-primary: #2c2c2c;
  --text-secondary: #5c5c5c;
  --accent-primary: #7b68ee;
  --accent-secondary: #6a5acd;
  --accent-hover: #9370db;
  --border-color: #d0d0d0;
  --error-color: #d32f2f;
  --success-color: #2e7d32;
  --warning-color: #f57c00;
}

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

body {
  font-family: 'Irish Grover', cursive, system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent-primary);
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 6px;
  font-family: 'Irish Grover', cursive;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  text-align: center;
}

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

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(147, 112, 219, 0.4);
}

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

.btn-secondary:hover {
  background: var(--bg-secondary);
  transform: translateY(-2px);
}

.btn-large {
  padding: 14px 32px;
  font-size: 1.1rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.btn-icon:hover {
  background: var(--bg-card);
}

.btn-icon:focus {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.landing-header {
  padding: 20px 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-brand {
  font-size: 1.5rem;
  color: var(--accent-primary);
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.hero-content {
  max-width: 800px;
}

.hero-title {
  font-size: 4rem;
  margin-bottom: 20px;
  color: var(--accent-primary);
  text-shadow: 0 0 20px rgba(147, 112, 219, 0.5);
}

.hero-subtitle {
  font-size: 1.8rem;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 20px;
  color: var(--accent-primary);
}

.section-description {
  font-size: 1.1rem;
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
  color: var(--text-secondary);
}

.about-section,
.features-section,
.demo-section,
.cta-section {
  padding: 80px 20px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature-card {
  background: var(--bg-card);
  padding: 30px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(147, 112, 219, 0.2);
  border-color: var(--accent-primary);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 15px;
}

.feature-title {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: var(--accent-primary);
}

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

.video-container {
  max-width: 900px;
  margin: 40px auto;
}

.video-placeholder {
  aspect-ratio: 16 / 9;
  background: var(--bg-card);
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
}

.video-icon {
  font-size: 4rem;
  margin-bottom: 20px;
}

.video-text {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.video-caption {
  color: var(--text-secondary);
  line-height: 1.8;
}

.cta-section {
  background: var(--bg-secondary);
  text-align: center;
}

.cta-title {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--accent-primary);
}

.cta-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.landing-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 20px 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h3 {
  color: var(--accent-primary);
  margin-bottom: 15px;
}

.footer-section p,
.footer-section a {
  color: var(--text-secondary);
  text-decoration: none;
  display: block;
  margin-bottom: 8px;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.auth-header {
  padding: 20px 0;
}

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

.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.auth-main {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
}

.auth-container {
  width: 100%;
  max-width: 450px;
}

.auth-card {
  background: var(--bg-card);
  padding: 40px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.auth-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 10px;
  color: var(--accent-primary);
}

.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-weight: 600;
  color: var(--text-primary);
}

.form-input {
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

.form-help {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

.success-message {
  background: var(--success-color);
  color: white;
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 20px;
  text-align: center;
}

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

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

.auth-link {
  color: var(--accent-primary);
  text-decoration: none;
}

.auth-link:hover {
  text-decoration: underline;
}

.app-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}

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

.app-title {
  font-size: 1.5rem;
  color: var(--accent-primary);
}

.header-actions {
  display: flex;
  gap: 15px;
  align-items: center;
}

.app-main {
  padding: 40px 0;
}

.controls-section {
  margin-bottom: 30px;
}

.search-bar {
  margin-bottom: 20px;
}

.search-input {
  width: 100%;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(147, 112, 219, 0.1);
}

.action-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.sort-section {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.sort-label {
  color: var(--text-secondary);
}

.sort-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  border-radius: 6px;
  color: var(--text-primary);
  cursor: pointer;
  font-family: inherit;
  transition: all 0.3s ease;
}

.sort-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--accent-primary);
}

.sort-btn.active {
  background: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

.sort-arrow {
  margin-left: 4px;
}

.records-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.record-card {
  background: var(--bg-card);
  padding: 20px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.record-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(147, 112, 219, 0.2);
  border-color: var(--accent-primary);
}

.record-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.record-title {
  font-size: 1.3rem;
  color: var(--accent-primary);
  flex: 1;
}

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

.record-author {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-style: italic;
}

.record-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.record-tag {
  background: var(--accent-primary);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
}

mark {
  background: var(--warning-color);
  color: var(--bg-primary);
  padding: 2px 4px;
  border-radius: 2px;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.modal-content {
  background: var(--bg-card);
  border-radius: 12px;
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

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

.modal-header h2 {
  color: var(--accent-primary);
}

.modal-close {
  background: none;
  border: none;
  font-size: 2rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0;
  width: 30px;
  height: 30px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--accent-primary);
}

.modal-form,
.modal-body {
  padding: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  padding: 20px;
}

.stat-card {
  background: var(--bg-secondary);
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-card h3 {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.stat-value {
  font-size: 2rem;
  color: var(--accent-primary);
  font-weight: bold;
}

.stat-detail {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 5px;
}

.file-input {
  width: 100%;
  padding: 10px;
  margin: 20px 0;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.import-result {
  padding: 12px;
  border-radius: 6px;
  margin-top: 15px;
  text-align: center;
}

.import-result.success {
  background: var(--success-color);
  color: white;
}

.import-result.error {
  background: var(--error-color);
  color: white;
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: 3rem;
  }
  
  .nav-links {
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.4rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .records-grid {
    grid-template-columns: 1fr;
  }
  
  .action-buttons {
    width: 100%;
  }
  
  .action-buttons .btn {
    flex: 1;
    font-size: 0.875rem;
  }
  
  .sort-section {
    font-size: 0.875rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 360px) {
  .hero-title {
    font-size: 2rem;
  }
  
  .auth-card {
    padding: 25px;
  }
  
  .btn {
    padding: 8px 16px;
    font-size: 0.875rem;
  }
}