/* Development Environment Setup Guide Styles */

:root {
    --bg-color: #0a0a0f;
    --card-bg-color: #1a1a2e;
    --primary-accent: #e94560;
    --secondary-accent: #0f3460;
    --text-color: #e0e0e0;
    --header-color: #ffffff;
    --border-color: #5372f0;
    --code-bg: #0c162d;
    --explainer-bg: rgba(83, 114, 240, 0.1);
    --success-color: #27ae60;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-color);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.15) 0%, transparent 50%);
    color: var(--text-color);
    line-height: 1.7;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

header h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 20px 0 15px 0;
    font-weight: 700;
}

header p {
    font-size: 1.3rem;
    color: var(--text-color);
    opacity: 0.9;
    font-weight: 400;
}

.section-intro {
    background: linear-gradient(145deg, var(--secondary-accent), rgba(15, 52, 96, 0.8));
    padding: 30px 40px;
    border-radius: 16px;
    margin-bottom: 50px;
    text-align: center;
    border: 1px solid rgba(83, 114, 240, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.section-intro::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
}

.section-intro p {
    font-size: 1.1rem;
    line-height: 1.8;
}

.prerequisite-card {
    background: var(--card-bg-color);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 40px;
    border: 1px solid rgba(83, 114, 240, 0.2);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.prerequisite-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: left 0.6s;
}

.prerequisite-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 25px 50px rgba(233, 69, 96, 0.2);
    border-color: rgba(233, 69, 96, 0.3);
}

.prerequisite-card:hover::before {
    left: 100%;
}

.prerequisite-card h3 {
    font-size: 1.8rem;
    color: var(--primary-accent);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
}

.prerequisite-card h3::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, var(--primary-accent), transparent);
    border-radius: 1px;
}

h4 {
    color: var(--header-color);
    font-size: 1.3rem;
    margin: 30px 0 15px 0;
    font-weight: 600;
}

.code-block {
    background: var(--code-bg);
    border-radius: 12px;
    padding: 20px 25px;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    color: #64ffda;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 25px 0;
    border: 1px solid rgba(83, 114, 240, 0.3);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
}

.code-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 12px 12px 0 0;
}

.explainer {
    background: var(--explainer-bg);
    border: 1px solid rgba(83, 114, 240, 0.3);
    padding: 20px 25px;
    margin: 25px 0;
    border-radius: 12px;
    font-size: 1rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.explainer::before {
    content: '💡';
    position: absolute;
    top: -10px;
    left: 20px;
    background: var(--card-bg-color);
    padding: 5px 10px;
    border-radius: 50px;
    font-size: 1.2rem;
}

.explainer strong {
    color: var(--primary-accent);
    font-weight: 600;
}

ol, ul {
    padding-left: 25px;
    margin: 20px 0;
}

li {
    margin-bottom: 15px;
    line-height: 1.6;
}

li strong {
    color: var(--header-color);
    font-weight: 600;
}

.final-verification {
    background: linear-gradient(145deg, rgba(39, 174, 96, 0.1), rgba(39, 174, 96, 0.05));
    border: 2px solid rgba(39, 174, 96, 0.3);
}

.final-verification h3 {
    color: var(--success-color);
}

.completion-banner {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 30px;
    border-radius: 16px;
    margin: 50px 0;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.completion-banner h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.completion-banner p {
    font-size: 1.1rem;
    opacity: 0.95;
}

footer {
    text-align: center;
    margin-top: 60px;
    padding: 30px 0;
    border-top: 1px solid rgba(83, 114, 240, 0.2);
    font-size: 1.1rem;
    color: #a0a0a0;
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    .prerequisite-card {
        padding: 25px;
        margin-bottom: 30px;
    }
    
    .section-intro {
        padding: 20px 25px;
    }
    
    .code-block {
        padding: 15px 20px;
        font-size: 0.85rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .prerequisite-card h3 {
        font-size: 1.5rem;
    }
    
    h4 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 20px 15px;
    }
    
    .prerequisite-card {
        padding: 20px;
    }
    
    .section-intro {
        padding: 15px 20px;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    header p {
        font-size: 1.1rem;
    }
}