/* Minimal design system inspired by Pointer AI */
:root {
  /* Color System - Minimal palette with 4 colors total */
  --primary-color: #0891b2; /* Cyan for CTAs */
  --accent-color: #10b981; /* Emerald for highlights */
  --text-primary: #1f2937; /* Dark gray for headings */
  --text-secondary: #6b7280; /* Medium gray for body text */
  --text-muted: #9ca3af; /* Light gray for subtle text */
  --background: #ffffff; /* Pure white background */
  --background-subtle: #f9fafb; /* Very light gray for sections */
  --border-color: #e5e7eb; /* Light border color */

  /* Typography */
  --font-heading: "Space Grotesk", sans-serif;
  --font-body: "DM Sans", sans-serif;

  /* Spacing */
  --section-padding: 5rem 0;
  --container-padding: 2rem;
}

/* Base Styles */
body {
  font-family: var(--font-body);
  color: var(--text-secondary);
  line-height: 1.6;
  background-color: var(--background);
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.2;
}

/* Navigation */
.navbar {
  background-color: var(--background) !important;
  border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary) !important;
}

.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* Buttons */
.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  font-weight: 500;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background-color: #0e7490;
  border-color: #0e7490;
  transform: translateY(-1px);
}

.btn-outline-secondary {
  color: var(--text-secondary);
  border-color: var(--border-color);
  font-weight: 500;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.btn-outline-secondary:hover {
  background-color: var(--text-primary);
  border-color: var(--text-primary);
  color: white;
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
  font-weight: 500;
  padding: 0.75rem 2rem;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.btn-accent:hover {
  background-color: #059669;
  border-color: #059669;
  color: white;
  transform: translateY(-1px);
}

.btn-warning {
  background-color: #f59e0b;
  border-color: #f59e0b;
  color: white;
}

.btn-warning:hover {
  background-color: #d97706;
  border-color: #d97706;
  color: white;
}

/* Hero Section */
.hero-section {
  padding: 8rem 0;
  background-color: var(--background);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Features Section */
.features-section {
  padding: var(--section-padding);
  background-color: var(--background-subtle);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.feature-card {
  padding: 2rem;
  background-color: var(--background);
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.feature-icon i {
  font-size: 1.5rem;
  color: white;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* Preview Section */
.preview-section {
  padding: var(--section-padding);
  background-color: var(--background);
}

.preview-title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.preview-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.code-preview {
  background-color: var(--text-primary);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.code-header {
  background-color: #374151;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid #4b5563;
}

.code-title {
  color: #d1d5db;
  font-size: 0.875rem;
  font-weight: 500;
}

.code-content {
  padding: 1.5rem;
  margin: 0;
  background-color: var(--text-primary);
  color: #d1d5db;
  font-family: "Monaco", "Menlo", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Testimonials Section */
.testimonials-section {
  padding: var(--section-padding);
  background-color: var(--background-subtle);
}

.testimonial-card {
  padding: 2rem;
  background-color: var(--background);
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  height: 100%;
  transition: all 0.2s ease;
}

.testimonial-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.testimonial-text {
  font-style: italic;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.testimonial-author {
  color: var(--primary-color);
  font-weight: 600;
}

/* CTA Section */
.cta-section {
  padding: var(--section-padding);
  background-color: var(--background);
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.cta-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  padding: 3rem 0;
  background-color: var(--background-subtle);
  border-top: 1px solid var(--border-color);
}

.footer-text {
  color: var(--text-muted);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Login Page Styles */
.login-page {
  background-color: var(--background-subtle);
  min-height: 100vh;
}

.login-card {
  background-color: var(--background);
  padding: 3rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.login-title {
  font-size: 2rem;
  font-weight: 600;
  color: var(--text-primary);
}

.login-subtitle {
  color: var(--text-secondary);
  margin-bottom: 0;
}

.form-label {
  color: var(--text-primary);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-control {
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 0.75rem 1rem;
  transition: all 0.2s ease;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(8, 145, 178, 0.25);
}

.form-control-lg {
  padding: 1rem 1.25rem;
  font-size: 1rem;
}

/* Dashboard-specific styles */
.text-accent {
  color: var(--accent-color) !important;
}

.progress-bar {
  background-color: var(--primary-color);
}

.lesson-card {
  padding: 1.5rem;
  background-color: var(--background);
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  transition: all 0.2s ease;
  height: 100%;
}

.lesson-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.lesson-icon {
  width: 48px;
  height: 48px;
  background-color: var(--primary-color);
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.lesson-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.lesson-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
}

.lesson-meta {
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
}

.lesson-card .badge {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.25rem 0.75rem;
}

.lesson-card .btn {
  font-weight: 500;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
}

.lesson-card .btn:hover {
  transform: translateY(-1px);
}

/* Lesson Detail Styles */
.lesson-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.lesson-detail-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.lesson-detail-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 0;
}

.lesson-actions .btn {
  width: 44px;
  height: 44px;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lesson-section {
  background-color: var(--background);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
}

.section-heading {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}

.section-heading i {
  color: var(--primary-color);
}

.code-container {
  border-radius: 0.75rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.explanation-content {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* Language Toggle Styles */
.language-toggle .btn-outline-primary {
  border-color: var(--border-color);
  color: var(--text-secondary);
  font-weight: 500;
}

.language-toggle .btn-outline-primary:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

.language-toggle .btn-check:checked + .btn-outline-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: white;
}

/* Translation Card Styles */
.translation-card {
  background-color: var(--background-subtle);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.translation-header {
  display: flex;
  justify-content: between;
  align-items: center;
  margin-bottom: 1rem;
}

.translation-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0;
}

.translation-text {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Audio Player Styles */
.audio-play-btn {
  font-weight: 500;
  border-radius: 0.5rem;
}

.audio-player {
  background-color: var(--background);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-top: 1rem;
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.audio-control-btn {
  background-color: var(--primary-color);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  transition: all 0.2s ease;
}

.audio-control-btn:hover {
  background-color: #0e7490;
  transform: scale(1.05);
}

.audio-progress {
  flex: 1;
  height: 6px;
  background-color: var(--border-color);
  border-radius: 3px;
  position: relative;
  cursor: pointer;
}

.audio-time {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  min-width: 80px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

/* Lesson Navigation */
.lesson-navigation {
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

/* Tutors Section */
.tutors-section {
  padding: var(--section-padding);
  background-color: var(--background);
}

.tutor-card {
  padding: 2rem 1rem;
  transition: all 0.2s ease;
  border: white;
}

.tutor-card:hover {
  transform: translateY(-4px);
}

.tutor-avatar {
  width: 320px;
  height: 320px;
  margin: 0 auto;
  overflow: hidden;
  border: 0px none;
  transition: all 0.2s ease;
}

.tutor-card:hover .tutor-avatar {
  border-color: var(--primary-color);
}

.tutor-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tutor-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.tutor-language {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 0;
}

/* Powered By Attribution Styles */
.powered-by {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.powered-by strong {
  color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-section {
    padding: 4rem 0;
  }

  .section-title {
    font-size: 2rem;
  }

  .login-card {
    padding: 2rem;
  }

  .feature-card {
    padding: 1.5rem;
  }

  .feature-icon {
    width: 50px;
    height: 50px;
  }

  .feature-icon i {
    font-size: 1.25rem;
  }

  .lesson-card {
    padding: 1rem;
  }

  .lesson-icon {
    width: 40px;
    height: 40px;
  }

  .lesson-icon i {
    font-size: 1rem;
  }

  .lesson-detail-title {
    font-size: 2rem;
  }

  .lesson-section {
    padding: 1.5rem;
  }

  .translation-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .language-toggle .btn-group {
    width: 100%;
  }

  .language-toggle .btn {
    flex: 1;
  }

  .tutor-avatar {
    width: 100px;
    height: 100px;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 2rem;
  }

  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }

  .login-card {
    padding: 1.5rem;
  }

  .lesson-card {
    padding: 0.75rem;
  }

  .lesson-icon {
    width: 36px;
    height: 36px;
  }

  .lesson-icon i {
    font-size: 0.75rem;
  }

  .lesson-detail-title {
    font-size: 1.75rem;
  }

  .lesson-section {
    padding: 1rem;
  }

  .audio-controls {
    flex-direction: column;
    gap: 0.5rem;
  }

  .audio-progress {
    width: 100%;
  }

  .tutor-avatar {
    width: 80px;
    height: 80px;
  }
}