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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

nav {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav .logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

main.container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    padding: 40px !important;
    margin: 30px auto !important;
    max-width: 1100px;
    flex: 1;
}

h1 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 10px;
}

h2 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 15px;
}

p {
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 20px;
    text-align: center;
    margin-top: auto;
}

footer .container {
    max-width: 1200px;
    margin: 0 auto;
}

footer p {
    margin: 0;
    color: #ecf0f1;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 600;
    margin: 5px;
}

.btn-primary {
    background-color: #667eea;
    color: white;
}

.btn-primary:hover {
    background-color: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background-color: #764ba2;
    color: white;
}

.btn-secondary:hover {
    background-color: #63408a;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(118, 75, 162, 0.4);
}

@media (max-width: 768px) {
    nav ul {
        flex-wrap: wrap;
        gap: 1rem;
        font-size: 0.9rem;
    }

    main.container {
        padding: 20px !important;
    }

    h1 {
        font-size: 1.8rem;
    }
}