:root {
    --primary-color: #0056b3;
    --secondary-color: #007bff;
    --bg-color: #f8f9fa;
    --card-bg-color: #ffffff;
    --text-color: #343a40;
    --light-text-color: #6c757d;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.08);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.8; 
}

.page-header {
    max-width: 800px;
    margin: 0 auto;
    padding: 1.5rem 2rem 0;
}

.btn-back {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #e9ecef;
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.btn-back:hover {
    background-color: #dee2e6;
}

.content-page {
    max-width: 800px; 
    margin: 1rem auto 2rem;
    padding: 2.5rem;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid #e9ecef;
}

.content-page h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 2.2rem;
    text-align: center;
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
}

.content-page .subtitle {
    font-size: 1.1rem;
    color: var(--light-text-color);
    margin-bottom: 2rem;
    font-style: italic;
    text-align: center;
}

.content-page h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-size: 1.6rem;
}

.content-page p {
    margin-bottom: 1rem;
}

.content-page .contact-email {
    text-align: center;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: var(--border-radius);
    font-size: 1.2rem;
}

.content-page a {
    color: var(--secondary-color);
    font-weight: 600;
    text-decoration: none;
}

.content-page a:hover {
    text-decoration: underline;
}

.main-footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--light-text-color);
    font-size: 0.9rem;
}

@media (max-width: 840px) {
    .content-page, .page-header {
        margin-left: 1rem;
        margin-right: 1rem;
        padding: 1.5rem;
    }
}