:root {
    --primary-blue: #0072ff;
    --primary-green: #00c853;
    --dark-gray: #1a202c;
    --light-gray: #f7fafc;
    --white: #ffffff;
    --transition: all 0.2s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
}

/* Navigation System */
nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #e2e8f0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; }

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links { display: flex; gap: 1.5rem; list-style: none; }
.nav-links a { color: #4a5568; text-decoration: none; font-weight: 500; font-size: 0.9rem; transition: var(--transition); }
.nav-links a:hover { color: var(--primary-blue); }

/* Buttons */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: transform 0.2s;
}

.cta-button:hover { transform: translateY(-2px); }

/* Layout Components */
.content-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
}

.container {
    max-width: 900px;
    margin: -2rem auto 4rem;
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    border-left: 4px solid var(--primary-blue);
    margin-bottom: 2rem;
}

.code-block {
    background: #1a202c;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 12px;
    font-family: monospace;
    overflow-x: auto;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .nav-container { flex-direction: column; gap: 1rem; }
    .container { margin: 1rem; width: calc(100% - 2rem); padding: 1.5rem; }
}