/* CSS Learning Guide Styles */

:root {
    --primary-color: #9c27b0;
    --primary-light: #ba68c8;
    --primary-dark: #7b1fa2;
    --secondary-color: #e91e63;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(156, 39, 176, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--bg-color);
}

/* Header Styles */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 3rem 2rem;
    text-align: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
}

/* Container */
.container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Intro Section */
.intro {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.intro h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Section Styles */
section {
    background: var(--white);
    padding: 2rem;
    margin-bottom: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 2rem;
    border-bottom: 3px solid var(--primary-light);
    padding-bottom: 0.5rem;
}

section h3 {
    color: var(--primary-dark);
    margin: 1.5rem 0 1rem;
}

/* Code Blocks */
.code-block {
    background: #2d2d2d;
    border-radius: 8px;
    overflow: hidden;
    margin: 1.5rem 0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.code-block pre {
    padding: 1.5rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.code-block code {
    color: #f8f8f2;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    display: block;
    white-space: pre-wrap;
}

/* Inline Code */
code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', Courier, monospace;
    color: var(--primary-dark);
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, #f3e5f5 0%, #fce4ec 100%);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    margin: 1.5rem 0;
}

/* Key Points List */
.key-points {
    list-style: none;
    padding: 0;
}

.key-points li {
    padding: 0.8rem 0;
    padding-left: 2rem;
    position: relative;
}

.key-points li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.key-points strong {
    color: var(--primary-dark);
}

/* Navigation */
.page-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 3rem;
    gap: 1rem;
}

.page-nav a {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: var(--shadow);
}

.page-nav a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(156, 39, 176, 0.3);
}

/* Footer */
footer {
    background: #2c2c2c;
    color: var(--white);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 1.5rem;
    }
    
    .page-nav {
        flex-direction: column;
    }
    
    .code-block pre {
        font-size: 0.85rem;
    }
}