:root {
    --color-bg: #f5f5f5;
    --color-primary: #333333;
    --color-secondary: #555555;
    --color-accent: #777777;
    --color-light: #ffffff;
    --font-main: 'Segoe UI', Tahoma, Geneva, Verdana;
}

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

body {
    font-family: var(--font-main), sans-serif;
    background-color: var(--color-bg);
    color: var(--color-primary);
    line-height: 1.6;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

header {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--color-light);
    padding: 1rem 2rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

header h1 {
    display: inline-block;
    margin-right: 2rem;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

header nav ul {
    list-style: none;
    display: inline-block;
}

header nav ul li {
    display: inline;
    margin-right: 1.5rem;
}

header nav ul li a.active {
    font-weight: bold;
    color: var(--color-primary);
}

section {
    padding: 3rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

h2 {
    margin-top: 2rem;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--color-primary);
}

h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.hero {
    text-align: center;
    padding: 4rem 2rem 2rem 2rem;
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.hero .btn {
    display: inline-block;
    justify-content: center;
    margin-bottom: 1rem;
}

section.projects{
    padding-top: 2rem;
    padding-bottom: 3rem;
}

.projects h2 {
    margin-top: 0;
    margin-bottom: 2rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;,
}

.project-card {
    background-color: var(--color-light);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.project-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.project-card p {
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    background-color: var(--color-accent);
    color: var(--color-light);
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background-color 0.2s;
}

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

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

form input,
form textarea {
    padding: 0.8rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-family: var(--font-main), sans-serif;
    font-size: 1rem;
}

form textarea {
    resize: vertical;
}

form button {
    width: fit-content;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: var(--color-light);
    color: var(--color-secondary);
    margin-top: 2rem;
}

@media(max-width: 768px) {
    header nav ul {
        display: flex;
        flex-direction: column;
        margin-top: 1rem;
    }

    header nav ul li {
        margin-bottom: 0.5rem;
    }

    .hero {
        padding: 3rem 1.5rem 1.5rem 1.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero .btn {
        margin-bottom: 0.8rem;
    }

    section.projects {
        padding-top: 1.5rem;
        padding-bottom: 2rem;
    }
}