/* Root Variables */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #0ea5e9;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Layout */
  --sidebar-width: 320px;
  --header-height: 70px;
  --border-radius: 8px;
  --border-radius-lg: 12px;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-color: #334155;
  --border-light: #475569;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* App Container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  backdrop-filter: blur(10px);
}

.header-content {
  height: 100%;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 100%;
}

.header-main {
  flex: 1;
  min-width: 0;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Search */
.search-container {
  position: relative;
  width: 300px;
  max-width: 100%;
}

.search-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.search-clear {
  position: absolute;
  right: var(--spacing-sm);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius);
  transition: all 0.2s ease;
}

.search-clear:hover {
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

.theme-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.hamburger {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Main Layout */
.main-layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  height: calc(100vh - var(--header-height));
  position: fixed;
  left: 0;
  top: var(--header-height);
  z-index: 900;
}

.sidebar-content {
  padding: var(--spacing-lg);
}

/* Progress Summary */
.progress-summary {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
}

.progress-summary h4 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  width: 0%;
  transition: width 0.3s ease;
}

.progress-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Navigation Sections */
.nav-sections {
  space-y: var(--spacing-sm);
}

.nav-section {
  margin-bottom: var(--spacing-sm);
}

.nav-section-header {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-weight: 600;
  color: var(--text-primary);
  transition: all 0.2s ease;
  text-align: left;
}

.nav-section-header:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
}

.nav-section-header.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.nav-icon {
  font-size: 1.125rem;
  flex-shrink: 0;
}

.nav-text {
  flex: 1;
  font-size: 0.875rem;
}

.nav-chevron {
  font-size: 0.75rem;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.nav-section-header.expanded .nav-chevron {
  transform: rotate(180deg);
}

/* Navigation Items */
.nav-items {
  margin-top: var(--spacing-sm);
  border-left: 2px solid var(--border-light);
  margin-left: var(--spacing-lg);
  padding-left: var(--spacing-md);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.nav-items.expanded {
  max-height: 1000px;
}

.nav-item {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  text-align: left;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--primary-color);
  color: white;
}

.nav-item.completed {
  background: var(--success-color);
  color: white;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: var(--spacing-xl);
  background: var(--bg-primary);
  min-height: calc(100vh - var(--header-height));
}

.content-area {
  max-width: 1200px;
  margin: 0 auto;
}

/* Home Content */
.home-content {
  text-align: center;
}

.hero-section h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.2;
}

.hero-section p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Quick Start */
.quick-start {
  text-align: left;
  margin-top: var(--spacing-2xl);
}

.quick-start h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  text-align: center;
}

.path-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.path-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all 0.2s ease;
}

.path-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.path-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.path-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.path-button {
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
}

.path-button:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* Dynamic Content */
.dynamic-content {
  animation: fadeIn 0.3s ease;
}

.topic-header {
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  padding-bottom: var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}

.topic-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.topic-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

/* Content Sections */
.content-section {
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.section-icon {
  font-size: 1.25rem;
}

.section-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}

.section-intro {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

/* Lists */
.concept-list, .feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.concept-item, .feature-item {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  transition: all 0.2s ease;
}

.concept-item:hover, .feature-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.concept-item:last-child, .feature-item:last-child {
  margin-bottom: 0;
}

.item-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.item-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Diagrams */
.diagram-container {
  margin: var(--spacing-xl) 0;
  text-align: center;
}

.diagram-image {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  background: white;
  padding: var(--spacing-lg);
}

.diagram-caption {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-md);
  font-style: italic;
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background: var(--bg-primary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.comparison-table th,
.comparison-table td {
  padding: var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.comparison-table th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.comparison-table td {
  color: var(--text-secondary);
  line-height: 1.6;
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* Code Blocks */
.code-block {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
}

.tag {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag.difficulty-easy {
  background: var(--success-color);
}

.tag.difficulty-medium {
  background: var(--warning-color);
}

.tag.difficulty-hard {
  background: var(--error-color);
}

/* External Links */
.external-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.external-link:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

.external-link::after {
  content: " ↗";
  font-size: 0.75rem;
  opacity: 0.7;
}

/* Search Results */
.search-results {
  animation: fadeIn 0.3s ease;
}

.search-results h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
}

.search-result-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  cursor: pointer;
  transition: all 0.2s ease;
}

.search-result-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.search-result-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.search-result-category {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--spacing-sm);
}

.search-result-snippet {
  color: var(--text-secondary);
  line-height: 1.6;
}

.search-highlight {
  background: rgba(37, 99, 235, 0.2);
  color: var(--primary-color);
  font-weight: 600;
  padding: 2px 4px;
  border-radius: 3px;
}

/* Utility Classes */
.hidden {
  display: none !important;
}

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

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

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

/* Responsive Design */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .header-title {
    font-size: 1.25rem;
  }

  .header-subtitle {
    display: none;
  }

  .search-container {
    width: 200px;
  }
}

@media (max-width: 768px) {
  .header-content {
    padding: 0 var(--spacing-md);
  }

  .main-content {
    padding: var(--spacing-lg);
  }

  .hero-section h1 {
    font-size: 2rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .path-cards {
    grid-template-columns: 1fr;
  }

  .search-container {
    width: 150px;
  }

  .comparison-table {
    font-size: 0.875rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: var(--spacing-lg);
  }

  .stat-number {
    font-size: 2rem;
  }

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

  .search-container {
    display: none;
  }
}

/* Print Styles */
@media print {
  .header,
  .sidebar,
  .theme-toggle,
  .mobile-menu-toggle,
  .search-container {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
    padding: 0;
  }

  .content-area {
    max-width: none;
  }

  body {
    background: white;
    color: black;
  }
}
/* Topic Actions */
.topic-actions {
  margin-top: var(--spacing-lg);
  display: flex;
  justify-content: center;
}

.completion-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.completion-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.completion-btn.completed {
  background: var(--success-color);
  color: white;
  border-color: var(--success-color);
}

.completion-btn.completed:hover {
  background: #059669;
  border-color: #059669;
}

.completion-icon {
  font-size: 1rem;
  font-weight: bold;
}

.completion-text {
  font-size: 0.875rem;
}

/* Complete Guide Styles */
.framework-steps {
  margin: var(--spacing-lg) 0;
}

.framework-list {
  list-style: none;
  counter-reset: step-counter;
  margin: var(--spacing-lg) 0;
  padding: 0;
}

.framework-list li {
  counter-increment: step-counter;
  position: relative;
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-2xl);
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  transition: all 0.2s ease;
}

.framework-list li:before {
  content: counter(step-counter);
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary-color);
  color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
}

.framework-list li:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.problems-section {
  margin: var(--spacing-lg) 0;
}

.problem-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.problem-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  transition: all 0.2s ease;
}

.problem-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.problem-item h4 {
  color: var(--primary-color);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-light);
  padding-bottom: var(--spacing-sm);
}

.problem-item p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.problem-details {
  margin-top: var(--spacing-lg);
}

.problem-details h5 {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.problem-details ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.problem-details li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.problem-details li:before {
  content: "•";
  color: var(--primary-color);
  font-weight: bold;
  position: absolute;
  left: 0;
}

.tips-section {
  margin: var(--spacing-lg) 0;
}

.tips-section h3 {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-color);
}

.tips-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tips-list li {
  position: relative;
  padding: var(--spacing-md);
  padding-left: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  line-height: 1.6;
  transition: all 0.2s ease;
}

.tips-list li:before {
  content: "✓";
  position: absolute;
  left: var(--spacing-md);
  top: var(--spacing-md);
  color: var(--success-color);
  font-weight: bold;
  font-size: 1.1rem;
}

.tips-list li:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
  background: var(--bg-secondary);
}

.tips-list li strong {
  color: var(--text-primary);
}