/*
 * Style sheet for the AIMU website (Artificial Intelligence for Multi Uses)
 * This file defines a clean, dark user interface that highlights the key
 * capabilities of a modern machine‑learning development tool.  The palette
 * is inspired by popular development environments with deep blues and
 * charcoal greys complemented by vibrant cyan accents.  Typography uses
 * Roboto for clarity and readability.  Feel free to adjust variables
 * below to fine‑tune the appearance of the pages.
 */

/* Root variables define the colour palette and layout rhythm */
:root {
  --bg-colour: #0d1117;
  --surface-colour: #161b22;
  --text-colour: #c9d1d9;
  --accent-colour: #3da9fc;
  --accent-colour-light: #65b1ff;
  --border-radius: 8px;
  --max-width: 1200px;
  --transition-speed: 0.3s;
}

/* Reset margins and paddings */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  background: var(--bg-colour);
  color: var(--text-colour);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Navigation bar */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: var(--surface-colour);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav .logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-colour);
  letter-spacing: 1px;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-img {
  height: 40px;
  width: auto;
  transition: transform var(--transition-speed);
}

.logo-img:hover {
  transform: scale(1.05);
}

.logo-text {
  margin-left: 12px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-colour-light);
  letter-spacing: 1px;
}

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

nav ul li a {
  color: var(--text-colour);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-speed);
}

nav ul li a:hover {
  color: var(--accent-colour);
}

/* Hero section */
header.hero {
  height: 70vh;
  background: linear-gradient(rgba(13, 17, 23, 0.8), rgba(13, 17, 23, 0.9)), url('assets/hero_bg.png') no-repeat center/cover;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-colour);
}

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

header.hero h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
  color: var(--accent-colour-light);
}

header.hero p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  color: var(--text-colour);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: var(--border-radius);
  background: var(--accent-colour);
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition-speed);
}

.btn:hover {
  background: var(--accent-colour-light);
}

.btn-secondary {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: var(--border-radius);
  background: transparent;
  border: 2px solid var(--accent-colour);
  color: var(--accent-colour);
  text-decoration: none;
  transition: all var(--transition-speed);
  margin-left: 1rem;
}

.btn-secondary:hover {
  background: var(--accent-colour);
  color: white;
}

/* Section layout */
.section {
  padding: 4rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--accent-colour);
  text-align: center;
}

/* Features overview cards */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.5);
}

.feature-card h3 {
  color: var(--accent-colour);
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--text-colour);
  font-size: 0.95rem;
}

/* Technical specifications section */
.technical-specs {
  margin: 3rem 0;
  padding: 2rem 0;
  border-top: 1px solid rgba(61, 169, 252, 0.2);
}

.technical-specs h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--accent-colour);
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.spec-item {
  background: var(--surface-colour);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid rgba(61, 169, 252, 0.1);
  transition: border-color var(--transition-speed);
}

.spec-item:hover {
  border-color: rgba(61, 169, 252, 0.3);
}

.spec-item h4 {
  color: var(--accent-colour);
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.spec-item p {
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Call to action section */
.cta {
  background: var(--surface-colour);
  padding: 3rem;
  border-radius: var(--border-radius);
  text-align: center;
  margin-top: 3rem;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--accent-colour-light);
}

.cta p {
  font-size: 1rem;
  margin-bottom: 1.5rem;
}

/* Footer */
footer {
  background: var(--surface-colour);
  padding: 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-colour);
}

footer a {
  color: var(--accent-colour);
  text-decoration: none;
  margin: 0 0.5rem;
}

footer a:hover {
  text-decoration: underline;
}

/* Forms */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

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

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem;
  margin-bottom: 1rem;
  border: none;
  border-radius: var(--border-radius);
  background: #0f1726;
  color: var(--text-colour);
}

.contact-form button {
  padding: 0.8rem 1.5rem;
  background: var(--accent-colour);
  color: #fff;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-speed);
}

.contact-form button:hover {
  background: var(--accent-colour-light);
}

/* Pricing Cards Styles */
.pricing-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.pricing-card {
  background: var(--surface-colour);
  border-radius: var(--border-radius);
  padding: 2rem;
  position: relative;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
}

.pricing-card.featured {
  border: 2px solid var(--accent-colour);
  transform: scale(1.05);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-5px);
}

.plan-badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-colour);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.8rem;
  font-weight: 500;
}

.plan-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.plan-title {
  font-size: 1.8rem;
  color: var(--accent-colour);
  margin-bottom: 0.5rem;
}

.plan-price {
  margin: 1rem 0;
}

.plan-price .price {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--text-colour);
}

.plan-price .price-old {
  font-size: 1.5rem;
  color: #8b949e;
  text-decoration: line-through;
  margin-right: 0.5rem;
}

.plan-price .period {
  font-size: 1rem;
  color: #8b949e;
}

.plan-description {
  color: #8b949e;
  font-size: 0.9rem;
}

.plan-features {
  flex-grow: 1;
  margin-bottom: 2rem;
}

.plan-features ul {
  list-style: none;
  padding: 0;
}

.plan-features li {
  padding: 0.5rem 0;
  color: var(--text-colour);
  border-bottom: 1px solid rgba(139, 148, 158, 0.2);
}

.plan-features li:last-child {
  border-bottom: none;
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-colour);
  color: var(--accent-colour);
}

.btn-outline:hover {
  background: var(--accent-colour);
  color: white;
}

.btn-primary {
  background: var(--accent-colour);
  color: white;
  border: 2px solid var(--accent-colour);
}

.btn-primary:hover {
  background: var(--accent-colour-light);
  border-color: var(--accent-colour-light);
}

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

.faq-section h2 {
  text-align: center;
  color: var(--accent-colour);
  margin-bottom: 2rem;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.faq-item {
  background: var(--surface-colour);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.faq-item h3 {
  color: var(--accent-colour);
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.faq-item p {
  color: var(--text-colour);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  header.hero h1 {
    font-size: 2.2rem;
  }
  header.hero p {
    font-size: 1rem;
  }
  nav ul {
    gap: 1rem;
  }
  
  .pricing-container {
    grid-template-columns: 1fr;
  }
  
  .pricing-card.featured {
    transform: none;
  }
  
  .pricing-card.featured:hover {
    transform: translateY(-5px);
  }
  
  .plan-price .price {
    font-size: 2rem;
  }
}

/* Username dropdown styles */
.username-dropdown {
  position: relative;
  display: inline-block;
  cursor: pointer;
  color: var(--accent-colour);
  font-weight: 500;
}

.username-dropdown:hover {
  color: var(--accent-colour-light);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--surface-colour);
  min-width: 150px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  border-radius: var(--border-radius);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-speed);
  z-index: 1000;
  border: 1px solid #30363d;
}

.username-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-colour);
  text-decoration: none;
  transition: background-color var(--transition-speed);
  border-bottom: 1px solid #30363d;
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background: var(--accent-colour);
  color: white;
}

.dropdown-menu a:first-child:hover {
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.dropdown-menu a:last-child:hover {
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Authenticated nav button styling */
nav ul li a.authenticated {
  color: var(--accent-colour) !important;
  background: none !important;
  padding: 0.5rem 0 !important;
}

nav ul li a.authenticated:hover {
  color: var(--accent-colour-light) !important;
}

/* Resource Center specific styles */
.page-header {
  background: linear-gradient(135deg, var(--surface-colour) 0%, #1c2128 100%);
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid #30363d;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--text-colour);
}

.page-header p {
  font-size: 1.2rem;
  color: #8b949e;
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 0.9rem;
  margin-bottom: 1rem;
  color: #8b949e;
}

.breadcrumb a {
  color: var(--accent-colour);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent-colour-light);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Resource center grid */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.resource-category {
  background: var(--surface-colour);
  padding: 2.5rem;
  border-radius: var(--border-radius);
  text-align: center;
  border: 1px solid #30363d;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.resource-category:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

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

.resource-category h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-colour);
}

.resource-category p {
  color: #8b949e;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.btn-secondary {
  background: transparent;
  color: var(--accent-colour);
  border: 2px solid var(--accent-colour);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-speed);
  display: inline-block;
}

.btn-secondary:hover {
  background: var(--accent-colour);
  color: white;
}

/* Featured content */
.featured-content {
  margin: 4rem 0;
}

.featured-content h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
  color: var(--text-colour);
}

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

/* Carousel Container */
.carousel-container {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  overflow: hidden;
}

.carousel-wrapper {
  overflow: hidden;
  margin: 0 50px;
}

.carousel-track {
  display: flex;
  transition: transform 0.5s ease-in-out;
  gap: 2rem;
}

.carousel-slide {
  flex: 0 0 calc(33.333% - 1.33rem);
  min-width: 0;
  max-width: calc(33.333% - 1.33rem);
}

.featured-item {
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid #30363d;
  position: relative;
  height: 280px;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.carousel-slide .featured-item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.carousel-slide:hover .featured-item {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.featured-item h4 {
  color: var(--text-colour);
  margin-bottom: 1rem;
  font-size: 1.2rem;
  height: 3rem;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.5;
}

.featured-item p {
  color: #8b949e;
  margin-bottom: 1rem;
  line-height: 1.6;
  flex-grow: 1;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
}

.resource-type {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--accent-colour);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Carousel Controls */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent-colour);
  color: white;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  transition: opacity 0.3s ease, background 0.3s ease;
}

.carousel-btn:hover {
  background: var(--accent-colour-light);
  opacity: 0.9;
}

.carousel-prev {
  left: 0;
}

.carousel-next {
  right: 0;
}

/* Carousel Indicators */
.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 2rem;
}

.indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #8b949e;
  cursor: pointer;
  transition: background 0.3s ease, width 0.3s ease;
}

.indicator.active {
  background: var(--accent-colour);
  width: 30px;
  border-radius: 5px;
}

/* Responsive Design for Carousel */
@media (max-width: 1024px) {
  .carousel-slide {
    flex: 0 0 calc(50% - 1rem);
    max-width: calc(50% - 1rem);
  }
}

@media (max-width: 768px) {
  .carousel-slide {
    flex: 0 0 100%;
    max-width: 100%;
  }

  .carousel-wrapper {
    margin: 0 40px;
  }

  .carousel-track {
    gap: 1rem;
  }

  .featured-item {
    height: 260px;
  }
}

@media (max-width: 480px) {
  .carousel-wrapper {
    margin: 0 30px;
  }

  .carousel-btn {
    width: 30px;
    height: 30px;
    font-size: 18px;
  }

  .featured-item {
    height: 240px;
    padding: 1.5rem;
  }

  .featured-item h4 {
    font-size: 1.1rem;
    height: 2.8rem;
  }
}

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 2rem;
  margin: 2rem 0;
  flex-wrap: wrap;
  align-items: center;
}

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

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

.filter-group select {
  background: var(--surface-colour);
  color: var(--text-colour);
  border: 1px solid #30363d;
  border-radius: var(--border-radius);
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

/* Articles grid */
.articles-grid {
  display: grid;
  gap: 2rem;
  margin: 2rem 0;
}

.article-card {
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid #30363d;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.article-meta span {
  background: #30363d;
  color: var(--text-colour);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.article-meta .category {
  background: var(--accent-colour);
  color: white;
}

.article-card h3 {
  color: var(--text-colour);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.article-card p {
  color: #8b949e;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.article-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
}

.article-footer .date {
  color: #8b949e;
  font-size: 0.9rem;
}

.read-more {
  color: var(--accent-colour);
  text-decoration: none;
  font-weight: 500;
}

.read-more:hover {
  color: var(--accent-colour-light);
}

/* Study cases grid */
.study-cases-grid {
  display: grid;
  gap: 2rem;
  margin: 2rem 0;
}

.case-study-card {
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid #30363d;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.case-study-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.case-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.case-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.case-meta span {
  background: #30363d;
  color: var(--text-colour);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.case-meta .industry {
  background: var(--accent-colour);
  color: white;
}

.case-results .metric {
  background: #2ea043;
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  font-weight: bold;
}

.case-study-card h3 {
  color: var(--text-colour);
  margin-bottom: 1rem;
  font-size: 1.4rem;
}

.case-summary {
  color: #8b949e;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.case-details {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.case-details > div h4 {
  color: var(--text-colour);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.case-details > div p {
  color: #8b949e;
  font-size: 0.9rem;
  line-height: 1.5;
}

.read-full-case {
  color: var(--accent-colour);
  text-decoration: none;
  font-weight: 500;
}

.read-full-case:hover {
  color: var(--accent-colour-light);
}

/* Guides styles */
.guides-section {
  margin: 3rem 0;
}

.guides-section h2 {
  color: var(--text-colour);
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
  border-bottom: 2px solid var(--accent-colour);
  padding-bottom: 0.5rem;
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.guide-card {
  background: var(--surface-colour);
  padding: 2rem;
  border-radius: var(--border-radius);
  border: 1px solid #30363d;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.guide-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.guide-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.guide-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.difficulty {
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.difficulty.beginner {
  background: #2ea043;
  color: white;
}

.difficulty.intermediate {
  background: #fb8500;
  color: white;
}

.difficulty.advanced {
  background: #da3633;
  color: white;
}

.duration {
  background: #30363d;
  color: var(--text-colour);
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.guide-progress .steps {
  background: var(--accent-colour);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 500;
}

.guide-card h3 {
  color: var(--text-colour);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.guide-card p {
  color: #8b949e;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.guide-topics {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.topic-tag {
  background: #30363d;
  color: #8b949e;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.8rem;
}

.start-guide {
  color: var(--accent-colour);
  text-decoration: none;
  font-weight: 500;
}

.start-guide:hover {
  color: var(--accent-colour-light);
}

/* Load more button */
.load-more {
  text-align: center;
  margin: 3rem 0;
}

.load-more .btn {
  background: var(--surface-colour);
  border: 2px solid #30363d;
  color: var(--text-colour);
}

.load-more .btn:hover {
  background: var(--accent-colour);
  border-color: var(--accent-colour);
  color: white;
}

/* Active navigation state */
nav ul li a.active {
  color: var(--accent-colour);
  font-weight: 600;
}

/* Mobile responsiveness for resource center */
@media (max-width: 768px) {
  .page-header h1 {
    font-size: 2rem;
  }

  .page-header p {
    font-size: 1rem;
  }

  .resource-grid,
  .featured-grid,
  .guides-grid {
    grid-template-columns: 1fr;
  }

  .filter-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .case-header {
    flex-direction: column;
    gap: 1rem;
  }

  .case-details {
    grid-template-columns: 1fr;
  }

  .guide-header {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Mobile Menu Styles */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.75rem;
  border-radius: 4px;
  transition: background-color 0.3s ease;
  z-index: 1001;
  width: 44px;
  height: 44px;
}

.mobile-menu-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-colour);
  margin: 3px 0;
  transition: all 0.3s ease;
  border-radius: 1px;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-20px);
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu-overlay {
  display: none !important;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: flex;
  }

  nav ul {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: var(--bg-colour);
    flex-direction: column;
    justify-content: flex-start;
    padding: 5rem 0 2rem 0;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.4);
    border-right: 1px solid var(--surface-colour);
  }

  nav ul.mobile-menu-open {
    left: 0;
  }

  nav ul li {
    margin: 0;
    width: 100%;
    opacity: 0;
    transform: translateX(-20px);
    animation: slideInLeft 0.3s ease forwards;
  }

  nav ul.mobile-menu-open li {
    opacity: 1;
    transform: translateX(0);
  }

  nav ul li:nth-child(1) { animation-delay: 0.1s; }
  nav ul li:nth-child(2) { animation-delay: 0.15s; }
  nav ul li:nth-child(3) { animation-delay: 0.2s; }
  nav ul li:nth-child(4) { animation-delay: 0.25s; }
  nav ul li:nth-child(5) { animation-delay: 0.3s; }
  nav ul li:nth-child(6) { animation-delay: 0.35s; }
  nav ul li:nth-child(7) { animation-delay: 0.4s; }

  nav ul li a {
    display: block;
    padding: 1.25rem 2rem;
    color: var(--text-colour);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
  }

  nav ul li a:hover,
  nav ul li a.active {
    background: var(--surface-colour);
    color: var(--accent-colour);
    padding-left: 2.5rem;
  }

  nav ul li a:hover::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 4px;
    background: var(--accent-colour);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}