/* IBM WatsonX Authentic Color Palette */
:root {
  /* IBM Blue Palette */
  --ibm-blue-10: #edf5ff;
  --ibm-blue-20: #d0e2ff;
  --ibm-blue-30: #a6c8ff;
  --ibm-blue-40: #78a9ff;
  --ibm-blue-50: #4589ff;
  --ibm-blue-60: #0f62fe;
  --ibm-blue-70: #0043ce;
  --ibm-blue-80: #002d9c;
  --ibm-blue-90: #001d6c;
  --ibm-blue-100: #001141;
  
  /* IBM Gray Palette */
  --ibm-gray-10: #f4f4f4;
  --ibm-gray-20: #e0e0e0;
  --ibm-gray-30: #c6c6c6;
  --ibm-gray-40: #a8a8a8;
  --ibm-gray-50: #8d8d8d;
  --ibm-gray-60: #6f6f6f;
  --ibm-gray-70: #525252;
  --ibm-gray-80: #393939;
  --ibm-gray-90: #262626;
  --ibm-gray-100: #161616;
  
  /* IBM Semantic Colors */
  --ibm-success: #24a148;
  --ibm-warning: #f1c21b;
  --ibm-error: #da1e28;
  --ibm-info: #0043ce;
  
  /* Dark Mode Colors */
  --dark-bg-primary: #161616;
  --dark-bg-secondary: #262626;
  --dark-bg-tertiary: #393939;
  --dark-text-primary: #ffffff;
  --dark-text-secondary: #c6c6c6;
  --dark-text-tertiary: #8d8d8d;
  --dark-border: #393939;
  
  /* Light Mode Colors */
  --light-bg-primary: #ffffff;
  --light-bg-secondary: #f4f4f4;
  --light-bg-tertiary: #e0e0e0;
  --light-text-primary: #161616;
  --light-text-secondary: #525252;
  --light-text-tertiary: #8d8d8d;
  --light-border: #e0e0e0;
  
  /* Current Theme Variables */
  --bg-primary: var(--light-bg-primary);
  --bg-secondary: var(--light-bg-secondary);
  --bg-tertiary: var(--light-bg-tertiary);
  --text-primary: var(--light-text-primary);
  --text-secondary: var(--light-text-secondary);
  --text-tertiary: var(--light-text-tertiary);
  --border-color: var(--light-border);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

/* Dark Mode Support */
[data-theme="dark"] {
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --bg-tertiary: var(--dark-bg-tertiary);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-tertiary: var(--dark-text-tertiary);
  --border-color: var(--dark-border);
}

/* Dark Mode Tutorial Category Styling */
[data-theme="dark"] .tutorial-category {
  background-color: var(--ibm-blue-90);
  color: var(--ibm-blue-20);
}


/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'IBM Plex Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
  font-size: 14px;
  font-weight: 400;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* IBM Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  margin: 1rem 0;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { 
  font-size: 2.25rem; 
  font-weight: 700;
  line-height: 1.1;
}
h2 { 
  font-size: 1.75rem; 
  font-weight: 600;
}
h3 { 
  font-size: 1.25rem; 
  font-weight: 600;
}
h4 { 
  font-size: 1rem; 
  font-weight: 600;
}

p {
  color: var(--text-secondary);
  line-height: 2;
}

/* IBM Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
  font-weight: 400;
  font-size: 0.875rem;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 2.5rem;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--ibm-blue-60);
  color: var(--ibm-gray-10);
  border-color: var(--ibm-blue-60);
}

.btn-primary:hover {
  background-color: var(--ibm-blue-70);
  border-color: var(--ibm-blue-70);
}

.btn-primary:focus {
  outline: 2px solid var(--ibm-blue-30);
  outline-offset: 2px;
}

.btn-secondary {
  background-color: transparent;
  color: var(--ibm-blue-60);
  border-color: var(--ibm-blue-60);
}

.btn-secondary:hover {
  background-color: var(--ibm-blue-10);
}

.btn-tertiary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-tertiary:hover {
  background-color: var(--bg-secondary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--text-primary);
  border: none;
  padding: 0.5rem;
}

.btn-ghost:hover {
  background-color: var(--bg-secondary);
}

.btn-large {
  padding: 1rem 1.5rem;
  font-size: 1rem;
  min-height: 3rem;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

.btn-outline {
  background-color: transparent;
  color: var(--ibm-blue-60);
  border: 1px solid var(--ibm-blue-60);
}

.btn-outline:hover {
  background-color: var(--ibm-blue-10);
}

/* IBM WatsonX Header */
.header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 4rem;
}

.navbar {
  height: 100%;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

.nav-brand .brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  height: 100%;
}

.nav-brand .brand-link i {
  font-size: 1.5rem;
  color: var(--ibm-blue-60);
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 0;
  height: 100%;
  align-items: center;
}

.nav-item {
  height: 100%;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 1.5rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1rem;
  transition: all 0.2s ease;
  border-bottom: 3px solid transparent;
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--ibm-blue-60);
}

.nav-link.active {
  color: var(--ibm-blue-60);
  border-bottom-color: var(--ibm-blue-60);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 1rem;
}

.bar {
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  margin: 2px 0;
  transition: 0.3s;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: 1rem;
}

.theme-toggle-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0;
  transition: color 0.2s ease;
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* IBM WatsonX Hero Section */
.hero {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  padding: 3rem 0;
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
  gap: 3rem;
}

.hero-content {
  flex: 1;
  max-width: 500px;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.2;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.hero-visual {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex: 1;
}

/* IBM WatsonX Cards */
.watsonx-cards {
  display: flex;
  gap: 1.5rem;
  max-width: 900px;
}

.watsonx-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 2rem;
  min-width: 280px;
  flex: 1;
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.watsonx-card:hover {
  border-color: var(--ibm-blue-60);
  box-shadow: 0 4px 12px rgba(15, 98, 254, 0.15);
  transform: translateY(-2px);
}

.watsonx-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1.5rem;
}

.watsonx-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.watsonx-card-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.watsonx-card-icon {
  width: 3rem;
  height: 3rem;
  background: linear-gradient(135deg, var(--ibm-blue-60), var(--ibm-blue-70));
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.watsonx-card-content {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

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

.watsonx-card-input {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
  border-radius: 0.25rem;
  transition: border-color 0.2s ease;
}

.watsonx-card-input:focus {
  outline: none;
  border-color: var(--ibm-blue-60);
  box-shadow: 0 0 0 2px rgba(15, 98, 254, 0.1);
}

.watsonx-card-input::placeholder {
  color: var(--text-tertiary);
}

.watsonx-card-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.watsonx-card-link {
  color: var(--ibm-blue-60);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s ease;
}

.watsonx-card-link:hover {
  color: var(--ibm-blue-70);
}

/* Features Section */
.features {
  padding: 4rem 0;
  background-color: var(--neutral-100);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--neutral-800);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card{
  background-color: var(--white);
  padding: 2rem;
  border-radius: 0.5rem;
  text-align: center;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--white);
  font-size: 1.5rem;
}

.feature-card h3 {
  color: var(--neutral-800);
  margin-bottom: 1rem;
}

/* Tutorial Cards */
.tutorials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.tutorial-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 2.5rem 2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 320px;
}

.tutorial-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--ibm-blue-60);
}

.tutorial-header {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.tutorial-categories {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
  height: 3rem;
  margin-bottom: 1rem;
  overflow: hidden;
}

.tutorial-category {
  background-color: var(--ibm-blue-10);
  color: var(--ibm-blue-60);
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 0.25rem;
  transition: background-color 0.3s ease, color 0.3s ease;
  display: inline-block;
  white-space: nowrap;
}

.tutorial-category::before {
  content: "#";
  margin-right: 0.25rem;
}

.tutorial-difficulty {
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.25rem;
}

.difficulty-beginner {
  background-color: var(--ibm-success);
  color: var(--ibm-gray-10);
  border-radius: 0.25rem;
}

.difficulty-intermediate {
  background-color: var(--ibm-warning);
  color: var(--ibm-gray-100);
  border-radius: 0.25rem;
}

.difficulty-advanced {
  background-color: var(--ibm-error);
  color: var(--ibm-gray-10);
  border-radius: 0.25rem;
}

.tutorial-title {
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
  line-height: 1.3;
  flex-grow: 1;
  min-height: 2.6rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.95rem;
  line-height: 1.4;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: auto;
  margin-bottom: 0;
  height: 1.5rem;
  flex-shrink: 0;
}

.tutorial-duration {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.tutorial-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ibm-blue-60);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
  margin-top: 1rem;
  align-self: flex-start;
}

.tutorial-link:hover {
  color: var(--ibm-blue-70);
}

/* Filters */
.tutorials-filters {
  padding: 2rem 0;
}

.filters-container {
  display: flex;
  gap: 2rem;
  align-items: end;
  flex-wrap: wrap;
}

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

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

.filter-select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  min-width: 200px;
}

.filter-select:focus {
  outline: none;
  border-color: var(--ibm-blue-60);
  box-shadow: 0 0 0 3px rgba(15, 98, 254, 0.1);
}

/* Page Headers */
.page-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
  padding: 3rem 0;
  text-align: center;
}

.page-title {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

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

/* Tutorial Detail */
.tutorial-detail {
  padding: 2rem 0;
}

.tutorial-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.tutorial-breadcrumb a {
  color: var(--ibm-blue-60);
  text-decoration: none;
}

.tutorial-breadcrumb a:hover {
  text-decoration: underline;
}

.tutorial-meta-info {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.tutorial-content {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 3rem;
  margin-top: 2rem;
  min-height: 500px;
}

.tutorial-main {
  min-width: 0;
}

.tutorial-sidebar {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  height: fit-content;
  position: sticky;
  top: 120px;
  min-width: 320px;
}

.tutorial-progress {
  margin-bottom: 2rem;
}

.tutorial-progress h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1rem;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--border-color);
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background-color: var(--ibm-blue-60);
  transition: width 0.3s ease;
}

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

.tutorial-outline h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-size: 1rem;
}

.outline-list {
  list-style: none;
}

.outline-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

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

.outline-item.active {
  color: var(--ibm-blue-60);
  font-weight: 500;
}

.outline-item i {
  width: 16px;
  text-align: center;
}

.tutorial-section {
  margin-bottom: 3rem;
}

.tutorial-section h2 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.info-box {
  background-color: var(--bg-secondary);
  border-left: 4px solid var(--ibm-blue-60);
  padding: 1.5rem;
  margin: 1.5rem 0;
  display: flex;
  gap: 1rem;
}

.info-box i {
  color: var(--ibm-blue-60);
  font-size: 1.25rem;
  margin-top: 0.25rem;
}

.info-box ul {
  margin-top: 0.5rem;
  padding-left: 1.5rem;
}

.step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.step-number {
  width: 40px;
  height: 40px;
  background-color: var(--ibm-blue-60);
  color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.code-block {
  background-color: var(--ibm-gray-100);
  color: var(--ibm-gray-10);
  padding: 1.5rem;
  margin: 1rem 0;
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

.code-block pre {
  margin: 0;
  font-family: 'IBM Plex Mono', 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
}

.best-practices {
  display: grid;
  gap: 1rem;
}

.practice-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.practice-item i {
  color: var(--ibm-success);
  font-size: 1.25rem;
}

.tutorial-navigation {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

/* Contact Form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.contact-methods {
  margin-top: 2rem;
}

.contact-method {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-details h3 {
  margin-bottom: 0.5rem;
  color: var(--neutral-800);
}

.contact-form {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.25rem;
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--ibm-blue-60);
  box-shadow: 0 0 0 2px rgba(15, 98, 254, 0.1);
}

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

.success-message {
  background-color: var(--ibm-success);
  color: var(--ibm-gray-10);
  padding: 1rem;
  border-radius: 0.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* FAQ Section */
.faq-section {
  margin-top: 4rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.faq-item {
  background-color: var(--white);
  padding: 1.5rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-sm);
}

.faq-item h3 {
  color: var(--neutral-800);
  margin-bottom: 1rem;
}

/* About Page */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

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

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

.stat-label {
  color: var(--neutral-600);
  font-size: 0.875rem;
}

.feature-list {
  list-style: none;
  margin: 1rem 0 4rem 0;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--neutral-600);
}

.feature-list i {
  color: var(--primary-blue);
  width: 20px;
}

.team-section {
  margin-top: 4rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.team-member {
  background-color: var(--white);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.member-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-blue), var(--secondary-purple));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--white);
  font-size: 2rem;
}

/* CTA Section */
.cta {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-purple) 100%);
  color: var(--white);
  padding: 4rem 0;
  text-align: center;
}

.cta-content h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Error Page */
.error-page {
  padding: 4rem 0;
  text-align: center;
}

.error-content {
  max-width: 600px;
  margin: 0 auto;
}

.error-visual {
  position: relative;
  margin-bottom: 2rem;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  color: var(--primary-blue);
  line-height: 1;
}

.error-robot {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  color: var(--accent-orange);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translate(-50%, -50%) translateY(0); }
  40% { transform: translate(-50%, -50%) translateY(-10px); }
  60% { transform: translate(-50%, -50%) translateY(-5px); }
}

.error-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* No Results */
.no-results {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--neutral-500);
}

.no-results i {
  font-size: 4rem;
  margin-bottom: 1rem;
  color: var(--neutral-400);
}

.no-results h3 {
  margin-bottom: 1rem;
  color: var(--neutral-600);
}

/* Footer */
.footer {
  background-color: var(--neutral-900);
  color: var(--white);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-section p {
  color: var(--neutral-400);
  margin-bottom: 1.5rem;
  line-height: 2;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: var(--neutral-400);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--white);
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background-color: var(--neutral-800);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  text-decoration: none;
  transition: background-color 0.2s ease;
}

.social-link:hover {
  background-color: var(--primary-blue);
}

.footer-bottom {
  border-top: 1px solid var(--neutral-800);
  padding-top: 1rem;
  text-align: center;
  color: var(--neutral-400);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .watsonx-cards {
    flex-direction: column;
    width: 100%;
  }

  .watsonx-card {
    min-width: auto;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 4rem;
    flex-direction: column;
    background-color: var(--bg-primary);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-lg);
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    height: auto;
  }

  .nav-item {
    height: auto;
  }

  .nav-link {
    height: auto;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-toggle {
    display: flex;
  }

  .hero-container {
    flex-direction: column;
    text-align: left;
    gap: 2rem;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .watsonx-cards {
    flex-direction: column;
    width: 100%;
  }

  .watsonx-card {
    min-width: auto;
    width: 100%;
  }

  .tutorial-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .tutorial-sidebar {
    position: static;
    margin-top: 2rem;
  }


  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .filters-container {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-select {
    min-width: auto;
  }

  .tutorial-navigation {
    flex-direction: column;
  }

  .error-code {
    font-size: 4rem;
  }

  .error-robot {
    font-size: 2rem;
  }
}


@media (max-width: 480px) {
  .container {
    padding: 0 0.5rem;
  }

  .hero {
    padding: 2rem 0;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }

  .tutorials-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}