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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
    color: #e0e0e0;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
}

header {
    background: linear-gradient(135deg, #2d2d2d 0%, #1f1f1f 100%);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

header h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #00d4ff 0%, #00ff88 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.controls {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
}

.select-box {
    flex: 1;
    min-width: 250px;
    padding: 12px 16px;
    background: #1a1a1a;
    border: 2px solid #333;
    border-radius: 8px;
    color: #e0e0e0;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.select-box:hover {
    border-color: #00d4ff;
}

.select-box:focus {
    outline: none;
    border-color: #00ff88;
}

.time-range-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.time-btn {
    padding: 10px 20px;
    background: #1a1a1a;
    border: 2px solid #333;
    border-radius: 6px;
    color: #e0e0e0;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.time-btn:hover {
    background: #2d2d2d;
    border-color: #00d4ff;
}

.time-btn.active {
    background: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);
    border-color: #00d4ff;
    color: #000;
}

.server-info {
    background: linear-gradient(135deg, #2d2d2d 0%, #1f1f1f 100%);
    padding: 20px 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.server-info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.server-info-label {
    font-size: 12px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.server-info-value {
    font-size: 16px;
    font-weight: 600;
    color: #00ff88;
}

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.chart-card {
    background: linear-gradient(135deg, #2d2d2d 0%, #1f1f1f 100%);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.chart-card.full-width {
    grid-column: 1 / -1;
}

.chart-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #e0e0e0;
}

.chart-card canvas {
    width: 100% !important;
    height: 300px !important;
}

.no-data {
    background: linear-gradient(135deg, #2d2d2d 0%, #1f1f1f 100%);
    padding: 60px;
    border-radius: 12px;
    text-align: center;
    font-size: 18px;
    color: #888;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.last-update {
    text-align: center;
    padding: 15px;
    color: #666;
    font-size: 13px;
}

@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    header {
        padding: 20px;
    }

    header h1 {
        font-size: 22px;
    }
}