:root {
  --primary: #0D2C5F;
  --secondary: #7B48FF;
  --accent: #FFB74D;
  --light: #F5F5F5;
  --dark: #121212;
  --text: #333333;
  --text-light: #FFFFFF;
}

body {
  font-family: 'Roboto', 'Open Sans', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
  margin: 0;
  padding: 0;
  min-height: 100%;
}

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

.header {
  background: var(--primary);
  padding: 20px 0;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, 
    rgba(123, 72, 255, 0.1) 0%, 
    rgba(255, 183, 77, 0.05) 100%);
}

.header-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--text-light);
  font-size: 24px;
  font-weight: 700;
  text-decoration: none;
  display: flex;
  align-items: center;
}

.logo-icon {
  margin-right: 10px;
  font-size: 28px;
  color: var(--accent);
}

.nav {
  display: flex;
}

.nav-item {
  color: var(--text-light);
  text-decoration: none;
  padding: 10px 15px;
  margin: 0 5px;
  border-radius: 20px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-item.active {
  background: var(--secondary);
  box-shadow: 0 4px 15px rgba(123, 72, 255, 0.3);
}

.notice {
  background: var(--accent);
  color: var(--primary);
  padding: 15px;
  text-align: center;
  font-weight: 500;
  margin: 20px 0;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.main {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 30px;
  margin: 30px 0;
}

.sidebar {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.sidebar-title {
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--light);
}

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

.sidebar-menu li {
  margin-bottom: 10px;
}

.sidebar-menu a {
  display: block;
  padding: 8px 12px;
  color: var(--text);
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.sidebar-menu a:hover {
  background: var(--light);
  color: var(--secondary);
}

.sidebar-menu a.active {
  background: var(--secondary);
  color: white;
}

.content {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.article {
  max-width: 800px;
  margin: 0 auto;
}

.article h2 {
  color: var(--primary);
  font-size: 28px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.article h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.article h3 {
  color: var(--primary);
  font-size: 22px;
  margin: 25px 0 15px;
}

.article p {
  margin-bottom: 20px;
  font-size: 16px;
  line-height: 1.7;
}

.code-block {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  border-left: 4px solid var(--secondary);
}

.code-block pre {
  margin: 0;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  line-height: 1.5;
  color: #333;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.table th, .table td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid #eee;
}

.table th {
  background: var(--primary);
  color: white;
}

.table tr:hover td {
  background: rgba(123, 72, 255, 0.05);
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.image-card {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.image-card img {
  width: 100%;
  height: auto;
  display: block;
}

.footer {
  background: var(--primary);
  color: white;
  padding: 30px 0;
  margin-top: 50px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
}

.footer-section h3 {
  font-size: 18px;
  margin-bottom: 15px;
  position: relative;
  padding-bottom: 10px;
}

.footer-section h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent);
}

.footer-section ul {
  list-style: none;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 10px;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: var(--accent);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  margin-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

@media (max-width: 768px) {
  .main {
    grid-template-columns: 1fr;
  }
  
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .nav {
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

/* Animations */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.floating {
  animation: float 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Particles */
.particle-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

.particle {
  position: absolute;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: moveParticles linear infinite;
}

@keyframes moveParticles {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(100vw, 100vh);
  }
}

/* Tooltip */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 120px;
  background-color: var(--primary);
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 5px;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -60px;
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}

/* Dark mode toggle */
.theme-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

.theme-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--primary);
  transition: .4s;
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--secondary);
}

input:checked + .slider:before {
  transform: translateX(30px);
}

/* Accordion */
.accordion {
  background-color: white;
  color: var(--text);
  cursor: pointer;
  padding: 15px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 16px;
  transition: 0.4s;
  margin-bottom: 10px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.active-accordion, .accordion:hover {
  background-color: var(--light);
}

.accordion:after {
  content: '\002B';
  color: var(--secondary);
  font-weight: bold;
  float: right;
  margin-left: 5px;
}

.active-accordion:after {
  content: "\2212";
}

.panel {
  padding: 0 15px;
  background-color: white;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease-out;
  margin-bottom: 15px;
  border-radius: 0 0 8px 8px;
}