:root {
    --primary: #1488c9;
    --text: #333;
    --bg: #fff;
    --light-bg: #f4f7f9;
    --border: #ddd;
    --container-width: 900px;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

header {
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 40px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
}

.nav-links a.active, .nav-links a:hover {
    color: var(--primary);
}

main {
    flex: 1;
    padding: 3rem 0;
}

h1, h2, h3 {
    color: var(--primary);
}

article h1 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

footer {
    background: var(--light-bg);
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

input, textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border);
    border-radius: 4px;
}

textarea {
    height: 150px;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    opacity: 0.9;
}

@media (max-width: 600px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }
}