:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --text-color: #333;
    --header-bg: #333;
    --header-text: #fff;
    --footer-bg: #333;
    --footer-text: #fff;
    --default-box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--header-bg);
    color: var(--header-text);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#logo {
    display: flex;
    align-items: center;
}

#logo img {
    height: 30px;
    margin-right: 10px;
}

h1 {
    font-size: 1.5rem;
}

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

nav ul li {
    margin-left: 1.5rem;
    position: relative;
}

nav ul li a {
    color: var(--header-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: var(--primary-color);
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--header-bg);
    min-width: 160px;
    box-shadow: var(--default-box-shadow);
    z-index: 1;
}

.dropdown-content li {
    margin: 0;
}

.dropdown-content a {
    color: var(--header-text);
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: #555;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.nav-toggle {
    display: none;
}

.nav-toggle-label {
    display: none;
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    cursor: pointer;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background-color: var(--header-text);
    height: 2px;
    width: 24px;
    border-radius: 2px;
    position: relative;
}

.nav-toggle-label span::before,
.nav-toggle-label span::after {
    content: '';
    position: absolute;
}

.nav-toggle-label span::before {
    top: -8px;
}

.nav-toggle-label span::after {
    top: 8px;
}

main {
    margin-top: 60px;
}

section {
    padding: 4rem 0;
    text-align: center;
}

section .container {
    max-width: 800px;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.hero {
    background-color: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 6rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.subheader {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.cta-button {
    display: inline-block;
    background-color: #fff;
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.cta-button:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.app {
    background-color: #fff;
    border-radius: 5px;
    padding: 2rem;
    box-shadow: var(--default-box-shadow);
    transition: transform 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.app:hover {
    transform: translateY(-5px);
}

.app h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-list {
    list-style-type: none;
    margin-bottom: 1.5rem;
    text-align: left;
}

.feature-list li {
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

.app-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    margin-top: auto;
}

.app-button:hover {
    background-color: #0056b3;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
}

.justify-content {
    text-align: justify;
}

footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 2rem 0;
    text-align: center;
}

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

footer p {
    margin-bottom: 1rem;
}

footer a {
    color: var(--footer-text);
    text-decoration: none;
    font-weight: bold;
}

footer a:hover {
    text-decoration: underline;
}
 

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-toggle-label {
        display: block;
    }

    nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
        background-color: var(--header-bg);
        position: absolute;
        top: 60px;
        left: 0;
    }

    nav ul li {
        margin: 0;
    }

    nav ul li a {
        padding: 1rem;
        display: block;
        text-align: center;
    }

    .nav-toggle:checked + .nav-toggle-label + ul {
        display: flex;
    }
}