:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --background-color: #f4f4f4;
    --card-background: #ffffff;
    --header-background: #3498db;
    --footer-background: #2c3e50;
}

.dark-mode {
    --primary-color: #4fa3d1;
    --secondary-color: #34495e;
    --text-color: #f4f4f4;
    --background-color: #1a1a1a;
    --card-background: #2c2c2c;
    --header-background: #2c3e50;
    --footer-background: #34495e;
}

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    font-size: 16px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.header {
    background-color: var(--header-background);
    color: white;
    padding: 1rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

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

.menu-toggle {
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle-span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px 0;
}

.nav-menu {
    display: none;
    list-style-type: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--header-background);
}

.nav-menu.active {
    display: block;
}

.nav-menu-item {
    padding: 10px;
    text-align: center;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

.theme-toggle {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
}

main {
    padding: 80px 20px 20px;
}

section {
    margin-bottom: 40px;
}

h1,
h2,
h3 {
    margin-bottom: 20px;
}

.hero {
    text-align: center;
    padding: 40px 0;
}

.hero h1 {
    font-size: 2rem;
    color: var(--primary-color);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    list-style-type: none;
}

.skill-list-item {
    background-color: var(--primary-color);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.highlight-skill {
    transform: scale(1.1);
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.project-card {
    background-color: var(--card-background);
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: background-color transform box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.project-links {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
}

.project-links-item {
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.github-link {
    background-color: #24292e;
    color: white;
}

.github-link:hover {
    background-color: #2c3e50;
}

.demo-link {
    background-color: var(--primary-color);
    color: white;
}

.demo-link:hover {
    background-color: #2980b9;
}

form {
    display: flex;
    flex-direction: column;
}

input,
textarea,
button {
    margin-bottom: 15px;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    background-color: var(--card-background);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--secondary-color);
}

.contact-form {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.form-group {
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

.error-message {
    display: none;
    color: #ff0000;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ff0000;
}

.form-group input.valid,
.form-group textarea.valid {
    border-color: #27ae60;
}

footer {
    text-align: center;
    padding: 20px;
    background-color: var(--footer-background);
    color: white;
    transition: background-color 0.3s ease;
}

.social-links {
    margin-bottom: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
}

/* Media Queries for larger screens */
@media (min-width: 48rem) {
    body {
        font-size: 18px;
    }

    .menu-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        background-color: transparent;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu-item {
        padding: 0 15px;
    }

    main {
        max-width: 1200px;
        margin: 0 auto;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .project-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-card {
        min-height: 200px;
    }

    form {
        max-width: 500px;
        margin: 0 auto;
    }
}

@media (min-width: 64rem) {
    .project-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (prefers-reduced-motion: reduce) {
    .skill-list-item {
        transition: none;
    }

    .highlight-skill {
        transform: none;
    }

    .project-card:hover {
        transform: none;
        box-shadow: none;
        transition: none;
    }

    .project-links a:hover {
        background-color: inherit;
        color: inherit;
        transition: none;
    }

    button:hover {
        background-color: var(--primary-color);
    }

    .error-message {
        animation: none;
    }

    /* Ensure any moving backgrounds are static */
    body {
        background-position: center; /* Prevents parallax or animated backgrounds */
    }
}