* {
    margin: 0;
    padding: 0;
}

html {
    margin: 0 auto;
}

body {
    margin: 0 auto;
}

nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

header {
    padding: 20px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
}

footer {
    margin-top: 50px;
    clear: both;
    background-color: #333;
    color: white;
    padding: 40px 0;
    text-align: center;
    width: 100%;
    bottom: 0;
}

main {
    margin: 50px auto;
}

main,
.container {
    width: 96%;
    max-width: 1440px;
}

section,
.section {
    margin: 50px auto;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title:after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background-color: #333;
    margin: 15px auto;
}

article,
.card {
    background-color: #f8f9fa;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.card-image {
    padding: 10px;
    text-align: center;
    background-color: #ddd;
    background-size: cover;
    background-position: center;
}

.card-content {
    padding: 20px;
}

.card-title {
    color: #000;
    font-size: 1.5em;
    margin-bottom: 10px;
}

.card-text {
    color: #6c757d;
    font-size: 1em;
    margin-bottom: 10px;
}