@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;500;700&family=Fira+Sans:wght@400;600&display=swap');

:root {
    --primary: #1A237E;
    --secondary: #4A148C;
    --accent: #FF6F00;
    --highlight: #00E676;
    --dark: #0A0A2E;
    --light: #E8EAF6;
}

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

body {
    font-family: 'Fira Sans', sans-serif;
    background: radial-gradient(circle at 30% 50%, 
        rgba(26, 35, 126, 0.8) 0%, 
        rgba(10, 10, 46, 1) 40%),
        linear-gradient(135deg, #0A0A2E 30%, #1A237E 100%);
    color: var(--light);
    line-height: 1.8;
    overflow-x: hidden;
}

.aurora-bg {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, 
        rgba(255, 111, 0, 0.15) 0%, 
        transparent 60%);
    animation: aurora-move 25s linear infinite;
    z-index: -1;
}

@keyframes aurora-move {
    0% { transform: rotate(0deg) translate(10%, 10%); }
    100% { transform: rotate(360deg) translate(-10%, -10%); }
}

.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.module-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 25px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.module-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 230, 118, 0.15);
}

.article-container {
    background: rgba(26, 35, 126, 0.9);
    border-radius: 16px;
    padding: 40px;
    margin: 60px 0;
    position: relative;
    overflow: hidden;
}

.article-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, 
        transparent 45%, 
        rgba(255, 111, 0, 0.1) 50%, 
        transparent 55%);
    animation: shine 8s infinite;
}

@keyframes shine {
    0% { transform: translate(-50%, -50%) rotate(45deg); }
    100% { transform: translate(50%, 50%) rotate(45deg); }
}

h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    margin: 1.5em 0 1em;
    position: relative;
}

h1 {
    font-size: 2.8em;
    text-align: center;
    background: linear-gradient(90deg, #FF6F00, #00E676);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: 2em;
    color: var(--highlight);
    padding-left: 20px;
    border-left: 4px solid var(--accent);
}

h3 {
    font-size: 1.6em;
    color: var(--accent);
    margin-top: 2em;
}

pre {
    background: rgba(0, 0, 0, 0.7);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
}

code {
    font-family: 'Fira Code', monospace;
    color: #00E676;
    font-size: 0.9em;
}

.decorative-image {
    width: 100%;
    max-width: 320px;
    height: auto;
    margin: 20px 0;
    border-radius: 8px;
    filter: drop-shadow(0 4px 12px rgba(0, 230, 118, 0.3));
}

.interactive-icon {
    width: 48px;
    height: 48px;
    margin: 15px;
    transition: all 0.3s ease;
}

.interactive-icon:hover {
    transform: rotate(15deg) scale(1.2);
    filter: brightness(1.2);
}

.footer-note {
    text-align: center;
    padding: 30px;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.6);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 60px;
}

@media (max-width: 768px) {
    .main-container {
        padding: 20px 15px;
    }
    
    .article-container {
        padding: 25px;
    }
    
    h1 {
        font-size: 2.2em;
    }
    
    pre {
        white-space: pre-wrap;
    }
}

@media (max-width: 480px) {
    .module-card {
        padding: 15px;
    }
    
    h2 {
        font-size: 1.6em;
    }
}

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

.floating-element {
    animation: float 4s ease-in-out infinite;
}

.grid-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin: 40px 0;
}

.grid-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.highlight-text {
    color: var(--highlight);
    font-weight: 600;
}

.warning-note {
    background: rgba(255, 111, 0, 0.15);
    border-left: 4px solid var(--accent);
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
}