/* React JS Learning Guide Styles */

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

:root {
    --primary-color: #61dafb;
    --secondary-color: #282c34;
    --accent-color: #21a1c4;
    --text-color: #333;
    --bg-color: #ffffff;
    --code-bg: #f5f5f5;
    --border-color: #e0e0e0;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --gradient-start: #61dafb;
    --gradient-end: #21a1c4;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    text-align: center;
    padding: 3rem 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    font-weight: 300;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* Sections */
section {
    background: white;
    margin-bottom: 2rem;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

section h3 {
    color: var(--accent-color);
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Intro Section */
.intro {
    background: linear-gradient(135deg, rgba(97, 218, 251, 0.1) 0%, rgba(33, 161, 196, 0.1) 100%);
    border-left: 5px solid var(--primary-color);
}

/* Highlight Box */
.highlight-box {
    background: linear-gradient(135deg, #e3f9ff 0%, #d4f1f9 100%);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 8px;
}

.highlight-box h3 {
    color: var(--secondary-color);
    margin-top: 0;
}

/* Code Blocks */
.code-block {
    background: var(--secondary-color);
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.code-block pre {
    margin: 0;
    padding: 1.5rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.code-block code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #61dafb;
    display: block;
    white-space: pre-wrap;
}

/* Inline Code */
p code, li code, td code {
    background: var(--code-bg);
    color: var(--error-color);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

/* Lists */
ul, ol {
    margin: 1rem 0 1rem 2rem;
}

li {
    margin: 0.5rem 0;
}

.key-points {
    list-style: none;
    margin-left: 0;
}

.key-points li {
    padding: 0.8rem;
    margin: 0.8rem 0;
    background: #f8f9fa;
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
    transition: background 0.3s ease;
}

.key-points li:hover {
    background: #e3f9ff;
}

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

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

thead {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
}

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

tbody tr:hover {
    background: #f5f5f5;
}

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

.page-nav a {
    background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
    color: white;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.page-nav a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    section {
        padding: 1.5rem;
    }
    
    .page-nav {
        flex-direction: column;
    }
    
    .page-nav a {
        text-align: center;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    animation: fadeIn 0.5s ease;
}

/* Print Styles */
@media print {
    body {
        background: white;
    }
    
    section {
        box-shadow: none;
        page-break-inside: avoid;
    }
    
    .page-nav {
        display: none;
    }
}