:root {
    --primary: #333;
    --free: #28a745;
    --occupied: #dc3545;
    --offline: #6c757d;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: transparent; /* Hintergrundbild sichtbar machen */
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    max-width: 90%;
    margin: 80px auto 20px auto;
    padding: 1em;
    background: rgba(255, 255, 255, 0.5); /* Noch transparenter */
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid #ccc;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.5em 1em;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-logo img {
    height: 50px;
    max-width: 150px;
}

.button {
    display: inline-block;
    text-decoration: none;
    background: var(--primary);
    color: #fff;
    padding: 0.5em 1em;
    border-radius: 5px;
    margin-right: 0.5em;
    transition: background 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.button:hover {
    background: #555;
}

.wallbox-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1em;
}

.wallbox-row {
    display: flex;
    gap: 1em;
    width: 100%;
}

.wallbox {
    flex: 1 1 30%;
    min-width: 200px;
    background: #fff;
    border: 3px solid #ccc;
    border-radius: 4px;
    padding: 0.8em;
    box-shadow: 0 0 4px rgba(0, 0, 0, 1);
    text-align: center;
}

.wallbox-free {
    border-color: var(--free);
    background: rgba(40, 167, 69, 0.5);
}

.wallbox-occupied {
    border-color: var(--occupied);
    background: rgba(220, 53, 69, 0.5);
}

.wallbox-offline {
    border-color: var(--offline);
    background: rgba(108, 117, 125, 0.5);
}

.penalty-info {
    font-size: 0.85em;
    color: #555;
    margin-top: 5px;
}

.penalty-bar {
    margin-top: 8px;
    position: relative;
    overflow: hidden;
    height: 16px;
    border-radius: 4px;
}

.penalty-bar div {
    transition: width 0.3s ease;
}

.charts {
    display: flex;
    flex-wrap: wrap;
    gap: 1em;
    margin-top: 1em;
}

.chartbox {
    flex: 1 1 45%;
    min-width: 250px;
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 0.8em;
    box-shadow: 0 0 4px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 0.8em;
    color: #666;
    background: rgba(255, 255, 255, 0.9);
    border-top: 1px solid #ccc;
}

/* Responsivität */
@media (max-width: 768px) {
    main {
        margin: 70px 10px 10px 10px;
        padding: 0.8em;
    }
    .wallbox-row {
        flex-direction: column;
    }
    .wallbox {
        flex: 1 1 100%;
        min-width: 80%;
        padding: 0.6em;
    }
    .navbar-container {
        flex-direction: column;
        align-items: flex-start;
        padding: 0.4em 0.8em;
    }
    .navbar-logo img {
        height: 40px;
    }
    .navbar-links {
        margin-top: 0.4em;
    }
    .button {
        padding: 0.4em 0.8em;
        font-size: 0.85em;
    }
}

@media (max-width: 480px) {
    h1, h2 {
        font-size: 1.1em;
    }
    .wallbox h2 {
        font-size: 1em;
    }
    .penalty-info, .wallbox p {
        font-size: 0.75em;
    }
    .button {
        font-size: 0.75em;
        padding: 0.3em 0.6em;
    }
    footer {
        font-size: 0.75em;
        padding: 0.5em;
    }
    .penalty-bar {
        height: 14px;
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    body {
        background: transparent;
        color: #fff;
    }
    main, .wallbox, .navbar, footer {
        background: rgba(51, 51, 51, 0.8);
        border-color: #555;
    }
    .penalty-info {
        color: #ccc;
    }
    .wallbox-free {
        background: rgba(40, 167, 69, 0.3);
    }
    .wallbox-occupied {
        background: rgba(220, 53, 69, 0.3);
    }
    .wallbox-offline {
        background: rgba(108, 117, 125, 0.3);
    }
}