* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary-color: #0078d7;
    --secondary-color: #2b88d8;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-gap: 1.5rem;
    margin-bottom: 2rem;
}

.sensor-card, .events-card {
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
}

.events-card {
    grid-column: span 2;
}

.overview-card {
    grid-column: span 2;
    background-color: var(--card-background);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.stats-container {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.stats-table {
    width: 100%;
    overflow-x: auto;
    display: block;
    margin-bottom: 1rem;
}

.stats-table table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0.5rem;
}

.stats-table th, 
.stats-table td {
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    text-align: left;
}

.stats-table th {
    background-color: #f0f0f0;
    position: sticky;
    top: 0;
}

.stats-table tr:nth-child(even) {
    background-color: rgba(0, 120, 215, 0.05);
}

.stats-table .stats-loading {
    text-align: center;
    padding: 2rem 0;
    color: #777;
}

.stats-highlight {
    font-weight: bold;
}

.stats-pos {
    color: var(--success-color);
}

.stats-neg {
    color: var(--danger-color);
}

.stats-details-header {
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.stats-details {
    width: 100%;
    font-size: 0.9rem;
}

.stats-empty {
    text-align: center;
    padding: 1.5rem;
    color: #777;
}

.sensor-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 1rem 0;
}

.sensor-info {
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.current-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.trend {
    font-size: 1.2rem;
    font-weight: bold;
}

.trend.positive {
    color: var(--success-color);
}

.trend.negative {
    color: var(--danger-color);
}

.timestamp {
    color: #777;
    font-size: 0.9rem;
}

.chart-container {
    height: 300px;
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    margin-top: 1rem;
    background-color: white;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.chart-container.loading::after {
    content: 'Daten werden geladen...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(255, 255, 255, 0.8);
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: bold;
    color: var(--primary-color);
    z-index: 10;
}

.chart-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.reset-zoom {
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 0.8rem;
    cursor: pointer;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.reset-zoom:hover {
    opacity: 1;
}

.chart-tip {
    font-size: 0.75rem;
    color: #777;
    margin-top: 5px;
    max-width: 200px;
    text-align: right;
}

.event-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.filter-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.event-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.event-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.event-item:last-child {
    border-bottom: none;
}

.event-type {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: bold;
}

.event-kompressor_an {
    background-color: rgba(40, 167, 69, 0.1);
    color: var(--success-color);
}

.event-kompressor_aus {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.loading {
    text-align: center;
    color: #777;
    padding: 2rem 0;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--card-background);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.timerange {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

select, button {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: white;
}

#refresh-btn {
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    border: none;
    transition: background-color 0.2s;
}

#refresh-btn:hover {
    background-color: var(--secondary-color);
}

footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

/* Fehlermeldung */
.error-message {
    background-color: var(--danger-color);
    color: white;
    padding: 12px 20px;
    margin: 10px 0;
    border-radius: 6px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    opacity: 1;
    transition: opacity 0.5s ease;
}

.error-message.fade-out {
    opacity: 0;
}

/* Ladezustand für Buttons */
button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .events-card, .overview-card {
        grid-column: span 1;
    }
}