* { box-sizing: border-box; }
body { margin: 0; display: flex; font-family: sans-serif; background-color: #f4f7f6; }

.sidebar { 
    width: 90px; height: 100vh; background: navy; color: white; 
    position: fixed; top: 0; left: 0;
    display: flex; flex-direction: column; align-items: center; padding-top: 20px;
    z-index: 1000; box-shadow: 5px 0 15px rgba(0, 0, 0, 0.3);
}

.logo { font-size: 2rem; color: gold; margin-bottom: 40px; font-weight: bold; }

.sidebar nav a { margin-bottom: 20px; text-decoration: none; }

.icon-box {
    width: 50px; height: 50px; background-color: rgba(255, 255, 255, 0.1);
    border: 2px solid gold; border-radius: 15px;
    display: flex; align-items: center; justify-content: center;
    color: gold; font-size: 1.5rem; transition: transform 0.2s;
}

.icon-box:hover { transform: scale(1.1); background-color: rgba(255, 255, 255, 0.2); }

.install-btn {
    margin-top: auto; margin-bottom: 30px; background: gold; border: none;
    padding: 10px; border-radius: 10px; color: navy; font-weight: bold; cursor: pointer;
}

main#app-root { margin-left: 90px; padding: 40px; width: calc(100% - 90px); }