:root {
  --primary: #1e3c72;
  --secondary: #2a5298;
  --accent: #8e2de2;
  --light: #f8f9fa;
  --dark: #121212;
  --text: #333;
  --text-light: #f8f9fa;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  min-height: 100%;
  padding: 0;
  margin: 0;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.header::after {
  content: '';
  display: block;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: 1rem auto;
  border-radius: 2px;
}

h1, h2, h3, h4 {
  color: var(--secondary);
  margin-bottom: 1rem;
  font-weight: 700;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2rem;
  margin-top: 2rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(42, 82, 152, 0.2);
}

h3 {
  font-size: 1.5rem;
  margin-top: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.code-container {
  position: relative;
  margin: 2rem 0;
}

pre {
  background: var(--dark);
  color: #f8f8f2;
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

code {
  font-family: 'Courier New', monospace;
  background: rgba(42, 82, 152, 0.1);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9rem;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  border-left: 4px solid var(--accent);
}

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

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.image-card {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.image-card:hover {
  transform: scale(1.03);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.image-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: block;
}

.notice {
  background: rgba(142, 45, 226, 0.1);
  border-left: 4px solid var(--accent);
  padding: 1rem;
  margin: 2rem 0;
  border-radius: 0 8px 8px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

th {
  background: var(--secondary);
  color: white;
}

tr:nth-child(even) {
  background: rgba(42, 82, 152, 0.05);
}

tr:hover {
  background: rgba(42, 82, 152, 0.1);
}

@media (max-width: 768px) {
  .container {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.7rem;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

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

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

.nav-tabs {
  display: flex;
  flex-wrap: wrap;
  margin: 2rem 0;
  border-bottom: 1px solid rgba(42, 82, 152, 0.2);
}

.nav-tab {
  padding: 0.8rem 1.5rem;
  background: white;
  border: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--secondary);
  transition: all 0.3s ease;
  border-radius: 8px 8px 0 0;
  margin-right: 0.5rem;
}

.nav-tab.active {
  background: var(--secondary);
  color: white;
}

.nav-tab:hover {
  background: rgba(42, 82, 152, 0.1);
}

.tab-content {
  display: none;
  padding: 2rem;
  background: white;
  border-radius: 0 8px 8px 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.tab-content.active {
  display: block;
}

.design-notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: white;
  padding: 1rem 1.5rem;
  border-radius: 50px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  font-weight: 600;
  color: var(--accent);
  z-index: 1000;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}