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

body {
    font-family: 'Courier New', Courier, monospace;
    background-color: #1c1c1c;
    color: white;
}

header {
    background-color: #000;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid #333;
}

h1 {
    font-size: 36px;
    color: white;
    margin: 0;
    font-weight: bold;
}

nav ul {
    display: flex;
    gap: 30px;
    list-style: none;
    margin: 0;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-size: 18px;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #1e90ff;
}

.comparison-container {
    padding: 40px;
}

.comparison-container h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 32px;
}

.product-comparison {
    display: flex;
    justify-content: space-around;
}

.product-card {
    background-color: #2e2e2e;
    padding: 25px;
    padding-bottom: 35px;
    border-radius: 5px;
    width: 30%;
    text-align: center;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card img {
    width: 100%;
    height: 50%;
    border-radius: 10px;
    margin-bottom: 20px;
    object-fit: cover;
}

.card-title {
    margin-bottom: 10px;
}

.specs {
    text-align: left;
}

.tablet-selector {
    margin: 0;
    padding: 10px;
    border-radius: 5px;
    width: 100%;
    max-width: none;
    box-sizing: border-box;
}

.spec-item {
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
}

.spec-item.blue {
    background-color: #2c4c9c;
}

.spec-item.red {
    background-color: #b32624;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1em 0;
    margin-top: 20px;
}

footer p {
    margin: 5px 0;
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 36px;
    color: white;
    margin: 0;
    text-align: left;
    flex: 1;
}

nav {
    margin-left: auto;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav ul li a {
    text-decoration: none;
    color: white;
    font-size: 18px;
}

nav ul li a:hover {
    color: #1e90ff;
}

@media (min-width: 1280px) {
    body {
        font-size: 18px;
    }

    .product-card {
        width: 30%;
    }

    .product-comparison {
        justify-content: space-between;
    }
}

@media (max-width: 1280px) and (min-width: 1024px) {
    body {
        font-size: 16px;
    }

    .product-card {
        width: 45%;
    }

    .product-comparison {
        justify-content: space-around;
    }

    h1 {
        font-size: 28px;
    }

    nav ul li a {
        font-size: 20px;
    }
}

@media (min-width: 768px) and (max-width: 1279px) {
    body {
        font-size: 12px;
    }

    h1 {
        font-size: 20px;
        text-align: center;
        margin-bottom: 10px;
    }

    header {
        background-color: #000;
        display: flex;
        flex-direction: column;
        align-items: center;
        border-bottom: 2px solid #333;
    }
    
    nav {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0;
        margin: 0;
    }
    
    nav ul {
        display: flex;
        justify-content: center;
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    nav ul li {
        margin: 0 15px;
        text-align: center;
    }
    
    nav ul li a {
        font-size: 15px;
        text-decoration: none;
        color: white;
    }

    .product-card {
        width: 100%;
        margin-bottom: 15px;
    }

    .product-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .product-comparison {
        flex-direction: column;
        align-items: center;
    }

    .specs {
        font-size: 12px;
    }

    footer p {
        font-size: 12px;
    }
}

@media (max-width: 767px) and (min-width: 480px) {
    body {
        font-size: 12px;
    }

    h1 {
        font-size: 20px;
        text-align: center;
        margin-bottom: 10px;
    }

    header {
        background-color: #000;
        display: flex;
        flex-direction: column;
        align-items: center;
        border-bottom: 2px solid #333;
    }
    
    nav {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0;
        margin: 0;
    }
    
    nav ul {
        display: flex;
        justify-content: center;
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    nav ul li {
        margin: 0 15px;
        text-align: center;
    }
    
    nav ul li a {
        font-size: 15px;
        text-decoration: none;
        color: white;
    }

    .product-card {
        width: 100%;
        margin-bottom: 15px;
    }

    .product-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .product-comparison {
        flex-direction: column;
        align-items: center;
    }

    .specs {
        font-size: 12px;
    }

    footer p {
        font-size: 12px;
    }
}

@media (max-width: 479px) {
    body {
        font-size: 12px;
    }

    h1 {
        font-size: 20px;
        text-align: center;
        margin-bottom: 10px;
    }

    header {
        background-color: #000;
        display: flex;
        flex-direction: column;
        align-items: center;
        border-bottom: 2px solid #333;
    }
    
    nav {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 0;
        margin: 0;
    }
    
    nav ul {
        display: flex;
        justify-content: center;
        list-style: none;
        padding: 0;
        margin: 0;
    }
    
    nav ul li {
        margin: 0 15px;
        text-align: center;
    }
    
    nav ul li a {
        font-size: 15px;
        text-decoration: none;
        color: white;
    }

    .product-card {
        width: 100%;
        margin-bottom: 15px;
    }

    .product-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .product-comparison {
        flex-direction: column;
        align-items: center;
    }

    .specs {
        font-size: 12px;
    }

    footer p {
        font-size: 12px;
    }
}