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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

.content {
    padding: 40px;
}

.module-section {
    margin-bottom: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 5px solid #667eea;
}

.module-section h2 {
    color: #667eea;
    margin-bottom: 15px;
    font-size: 1.8em;
}

.module-section h3 {
    color: #764ba2;
    margin: 20px 0 10px 0;
    font-size: 1.3em;
}

.demo-controls {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin: 15px 0;
}

button {
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

.result {
    margin-top: 15px;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border: 2px solid #667eea;
    min-height: 50px;
}

.result strong {
    color: #667eea;
}

.code-example {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 8px;
    margin: 15px 0;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    line-height: 1.6;
}

.code-example .keyword {
    color: #ff79c6;
}

.code-example .function {
    color: #50fa7b;
}

.code-example .string {
    color: #f1fa8c;
}

.info-box {
    background: #e7f3ff;
    border-left: 4px solid #2196F3;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
}

.info-box strong {
    color: #2196F3;
}