/* Grundlegender Reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Body-Styles */
body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f8f8;
    padding: 20px;
}

/* Container für zentrierten Inhalt */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
header {
    background-color: #fff;
    border-bottom: 1px solid #e0e0e0;
    padding: 20px 0;
    margin-bottom: 30px;
    text-align: center;
}

header h1 {
    margin-bottom: 10px;
}

header nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
}

header nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    padding: 8px 12px;
    transition: background-color 0.3s, color 0.3s;
}

header nav ul li a:hover {
    background-color: #007BFF;
    color: #fff;
    border-radius: 4px;
}

/* Main Bereich */
main {
    background-color: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

/* Überschriften */
h2,
h3 {
    margin-bottom: 15px;
    color: #222;
}

/* Gruppen-Karten */
.group-card {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
    transition: box-shadow 0.3s;
}

.group-card:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

/* Gruppen-Header */
.group-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.group-image {
    width: 50px;
    height: 50px;
}

/* Liste der Glühbirnen */
.bulb-list {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.bulb {
    flex: 1 1 200px;
    background-color: #f0f0f0;
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    transition: transform 0.3s;
}

.bulb:hover {
    transform: translateY(-5px);
}

.bulb-info p {
    margin-bottom: 10px;
    font-weight: bold;
}

/* Statusbild der Glühbirne */
.bulb-status-image img {
    width: 60px;
    height: 60px;
}

/* Fehlermeldung */
.bulb-error p {
    margin-top: 10px;
    color: red;
    font-size: 0.9em;
}

/* Footer */
footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid #e0e0e0;
    color: #777;
}

/* Responsive Anpassen */
@media (max-width: 768px) {
    header nav ul {
        flex-direction: column;
        gap: 10px;
    }

    main {
        padding: 20px;
    }

    .bulb-list {
        flex-direction: column;
    }
}