body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #222; /* Tmavé pozadí */
    color: #f8f8f8; /* Světlý text pro čitelnost */
}

.container {
    max-width: 1100px;
    margin: auto;
    overflow: hidden;
    padding: 0 2rem;
}

header {
    background: #000; /* Černá hlavička */
    color: #fff;
    padding: 1rem 0;
    border-bottom: 3px solid #ffcc00; /* Žlutá linka */
}

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

header h1 {
    margin: 0;
    font-size: 2rem;
    color: #fff;
}

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

nav a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    margin-left: 1.5rem;
    transition: color 0.3s;
}

nav a:hover {
    color: #ffcc00; /* Žlutý text při najetí myší */
}

.btn {
    display: inline-block;
    background: #ffcc00;
    color: #000;
    padding: 0.8rem 2rem;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #e6b800;
}

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

#hero {
    background: #000;
    color: #fff;
    padding: 6rem 0;
}

#hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

#hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.bg-gray {
    background-color: #333;
    color: #f8f8f8;
}

.bg-dark {
    background-color: #000;
    color: #fff;
}

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

.service-item {
    background: #444; /* Tmavší pozadí pro jednotlivé boxy */
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.advantages {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.advantage-item {
    width: 200px;
    margin: 1rem;
    text-align: center;
    background: #444; /* Tmavší pozadí pro jednotlivé boxy */
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.contact-details {
    margin-top: 2rem;
}

.contact-details a {
    color: #ffcc00;
    text-decoration: none;
}

footer {
    background: #000;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
}

/* Responzivní design */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    nav ul {
        flex-direction: column;
        margin-top: 1rem;
    }
    nav a {
        margin: 0.5rem 0;
    }
    #hero h1 {
        font-size: 2.5rem;
    }
    .service-grid {
        grid-template-columns: 1fr;
    }
}