* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #111;
    color: #fff;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    text-align: center;
    padding: 30px 0;
}

.logo {
    font-size: 32px;
    font-weight: bold;
    letter-spacing: 2px;
}

.subtitle {
    color: #aaa;
    margin-top: 8px;
}

.menu {
    display: grid;
    gap: 12px;
}

.menu-button {
    width: 100%;
    padding: 18px;
    border: none;
    border-radius: 14px;
    background: #222;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    text-align: left;
}

.menu-button:hover {
    background: #333;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

.back-button {
    margin-bottom: 20px;
    padding: 10px 15px;
    border: none;
    border-radius: 10px;
    background: #333;
    color: white;
    cursor: pointer;
}

.service-card {
    background: #222;
    border-radius: 15px;
    padding: 18px;
    margin-bottom: 12px;
}

.service-card h3 {
    margin-top: 0;
}

.service-description {
    color: #aaa;
    line-height: 1.5;
}

.service-info {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    font-weight: bold;
}