:root {
    --bg-primary: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --accent-cyan: #00d4ff;
    --accent-green: #00ff94;
    --accent-orange: #ff9f43;
    --accent-red: #ff6b6b;
    --text-primary: #ffffff;
    --text-secondary: #8b8b9e;
    --border-color: #2a2a3a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.logo {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--accent-cyan);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

    .status-dot.offline {
        background: var(--accent-red);
        animation: none;
    }

    .status-dot.connecting {
        background: var(--accent-orange);
    }

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(0, 255, 148, 0.4);
    }

    50% {
        opacity: 0.8;
        box-shadow: 0 0 0 8px rgba(0, 255, 148, 0);
    }
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

    .card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: var(--card-accent, var(--accent-cyan));
    }

    .card:hover {
        background: var(--bg-card-hover);
        transform: translateY(-4px);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card-icon {
    font-size: 1.5rem;
}

.card-value {
    font-size: 3rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: var(--card-accent, var(--accent-cyan));
}

.card-unit {
    font-size: 1rem;
    color: var(--text-secondary);
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.card.temperature {
    --card-accent: #ff6b6b;
}

.card.humidity {
    --card-accent: #00d4ff;
}

.card.pressure {
    --card-accent: #a855f7;
}

.card.altitude {
    --card-accent: #00ff94;
}

.card.aqi {
    --card-accent: #ff9f43;
}

.card.eco2 {
    --card-accent: #f472b6;
}

.card.tvoc {
    --card-accent: #facc15;
}

.card.status {
    --card-accent: #22d3ee;
}

.quality-bar {
    margin-top: 1rem;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.quality-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.5s ease;
}

.quality-label {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.error-message {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid var(--accent-red);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
    color: var(--accent-red);
    display: none;
}

    .error-message.active {
        display: block;
    }

.loading .card-value {
    background: linear-gradient(90deg, var(--bg-card) 25%, var(--border-color) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 8px;
    color: transparent;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* Time Range Buttons */
.time-range-buttons {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.time-btn {
    padding: 0.5rem 1rem;
    background: #1a1a25;
    border: 1px solid #2a2a3a;
    border-radius: 8px;
    color: #8b8b9e;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

    .time-btn:hover {
        border-color: #00d4ff;
        color: #ffffff;
    }

    .time-btn.active {
        background: #00d4ff;
        border-color: #00d4ff;
        color: #0a0a0f;
    }

.chart-container {
    position: relative;
    height: 250px;
    margin-top: 1rem;
    transition: opacity 0.3s ease;
}


/* Chart spezifische Styles */
.card.chart {
    grid-column: 1 / -1;
}

@media (max-width: 900px) {
    .card.chart {
        grid-column: span 1;
    }
}

.chart-container {
    position: relative;
    height: 250px;
    margin-top: 1rem;
}

.chart-legend {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #8b8b9e;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

    .legend-dot.temp {
        background: #ff6b6b;
    }

    .legend-dot.humidity {
        background: #00d4ff;
    }


@media (max-width: 900px) {
    .card.chart {
        grid-column: 1;
    }
}

.card.chart {
    overflow: visible;
}

/* Chart-Regler */
.chart-controls {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin: 0.5rem 0 0.75rem 0;
    align-items: center;
}

.control-group {
    flex: 1 1 320px;
    min-width: 260px;
}

    .control-group label {
        display: block;
        font-size: 0.75rem;
        color: var(--text-secondary);
        margin-bottom: 0.35rem;
        font-family: 'JetBrains Mono', monospace;
    }

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

    .range-row input[type="range"] {
        -webkit-appearance: none;
        appearance: none;
        height: 6px;
        background: linear-gradient(90deg, var(--border-color), var(--bg-card-hover));
        border-radius: 6px;
        flex: 1;
    }

        .range-row input[type="range"]::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent-cyan);
            border: 2px solid var(--bg-card);
        }

.range-value {
    min-width: 56px;
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
    font-size: 0.85rem;
}