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

html, body {
    height: 100%;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: #f4f7f9;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 2rem 1rem;
    min-height: 100vh;
}

.main-header img {
    width: 100px;
    height: auto;
    margin-bottom: 1rem;
}

.main-header, .page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.main-header h1, .page-header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.main-header p {
    font-size: 1.2rem;
    color: #7f8c8d;
}

.main-footer {
    text-align: center;
    margin-top: 3rem;
    color: #95a5a6;
    font-size: 0.9rem;
}

.hub-container {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 2rem;
    flex-wrap: wrap;
    max-width: 1200px;
    width: 100%;
}

.brick {
    background-color: #ffffff;
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    text-decoration: none;
    color: #333;
    flex: 1;
    min-width: 280px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e0e0e0;
}

.brick:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 25px rgba(44, 62, 80, 0.1);
}

.brick i {
    font-size: 3rem;
    color: #1abc9c;
    margin-bottom: 1.5rem;
}

.brick h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.brick p {
    font-size: 1rem;
    color: #7f8c8d;
}

.content-container {
    background-color: #ffffff;
    padding: 0 3rem 3rem 3rem;
    border-radius: 12px;
    max-width: 800px;
    width: 100%;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.content-container a {
    padding-bottom: 1rem;
}

.content-container h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.content-container h3 {
    margin-top: 2rem;
    margin-bottom: 0.5rem;
    color: #1abc9c;
}

.back-link {
    display: inline-block;
    margin-top: 2rem;
    text-decoration: none;
    color: #1abc9c;
    font-weight: 600;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #16a085;
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }

    .main-header h1, .page-header h1 {
        font-size: 2rem;
    }

    .hub-container {
        flex-direction: column;
        gap: 1.5rem;
    }

    .content-container {
        padding: 1.5rem;
    }
}

.main-footer {
    padding: 40px 20px 0;
    text-align: left;
}

.footer-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    max-width: 900px;
    margin: 0 auto 30px;
    gap: 20px;
}

.footer-column {
    flex: 1;
    min-width: 280px;
}

.footer-column h3 {
    color: #1f1f1f;
    margin-bottom: 15px;
    padding-bottom: 10px;
    font-weight: 600;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
}

.footer-column li i {
    width: 25px;
    text-align: center;
    margin-right: 10px;
    color: #1abc9c;
}

.footer-column a {
    color: #1f1f1f;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: #000000;
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #1abc9c;
    font-size: 0.9em;
}