:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --primary-color: #007bff;
    --header-bg-color: rgba(255, 255, 255, 0.9);
    --border-color: #eeeeee;
    --header-height: 100px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background-color: var(--header-bg-color);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #000;
    font-size: 1.25rem;
    font-weight: bold;
}

.logo-img {
    height: 80px;
    margin-right: 10px;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    font-weight: bold;
}

.hamburger {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
}

.hamburger .bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 5px auto;
    transition: all 0.3s ease-in-out;
    background-color: #000;
}

main {
    padding: 60px 0;
}

section {
    padding: 40px 0;
}

h1, h2 {
    color: #000;
    margin-bottom: 20px;
    text-align: center;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.2rem; }

p, li {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 1rem auto;
    text-align: center;
}

ul.service-list, ul.product-list {
    list-style-position: inside;
    text-align: center;
    padding: 0;
}

.contact-info {
    text-align: center;
    margin-bottom: 30px;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 12px;
    background-color: #f9f9f9;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 5px;
    font-size: 1rem;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form button {
    padding: 12px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.footer {
    padding: 30px 0;
    text-align: center;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        left: -100%;
        top: var(--header-height);
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: all 0.3s ease;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        margin: 0;
    }
    
    .nav-links a {
        display: block;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links li:last-child a {
        border-bottom: none;
    }

    .hamburger {
        display: block;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}