/* ═══════════════════════════════════════════════════════════════
   Network Monitor v5.0 — Charts CSS
   Chart containers, radar, sparklines, legends
   ═══════════════════════════════════════════════════════════════ */

/* ── Chart Container ── */
.ch {
    height: 185px;
    position: relative;
    padding: 8px;
}

.ch canvas,
.ch svg {
    width: 100% !important;
    height: 100% !important;
}

/* ── Chart Container (Compact) ── */
.cht {
    height: 130px;
    position: relative;
    padding: 6px;
}

.cht canvas,
.cht svg {
    width: 100% !important;
    height: 100% !important;
}

/* ── Radar Container ── */
.radar-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.radar-container canvas {
    max-width: 100%;
    max-height: 100%;
}

/* ── Row Sparkline ── */
.row-sparkline {
    display: inline-block;
    width: 60px;
    height: 18px;
    vertical-align: middle;
}

.row-sparkline svg {
    width: 100%;
    height: 100%;
}

.row-sparkline path {
    fill: none;
    stroke: var(--cyan);
    stroke-width: 1.5;
}

.row-sparkline .area {
    fill: var(--cd);
    stroke: none;
    opacity: .4;
}

/* ── Row Trend ── */
.row-trend {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: 9px;
    font-weight: 600;
    font-family: var(--m);
}

.row-trend.up { color: var(--green); }
.row-trend.down { color: var(--red); }
.row-trend.flat { color: var(--t3); }

.row-trend::before {
    font-size: 8px;
}

.row-trend.up::before { content: '\25B2'; }
.row-trend.down::before { content: '\25BC'; }
.row-trend.flat::before { content: '\25C6'; }

/* ── Polar Legend ── */
.polar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    padding: 6px 10px;
    font-size: 9px;
    color: var(--t2);
}

.polar-legend .legend-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.polar-legend .legend-dot {
    width: 7px;
    height: 7px;
    border-radius: 2px;
    flex-shrink: 0;
}

.polar-legend .legend-label {
    white-space: nowrap;
}

.polar-legend .legend-value {
    font-family: var(--m);
    font-weight: 600;
    color: var(--t1);
}

/* ── Chart skeleton loading state ── */
.ch.loading canvas,
.cht.loading canvas {
    opacity: 0;
}

.ch.loading::before,
.cht.loading::before {
    content: '';
    position: absolute;
    inset: 8px;
    background: linear-gradient(90deg, var(--b3) 25%, var(--b4) 50%, var(--b3) 75%);
    background-size: 200px 100%;
    animation: skeletonPulse 1.5s ease-in-out infinite;
    border-radius: var(--rs);
}

/* ── Chart card hover elevation ── */
.C:has(.ch):hover,
.C:has(.cht):hover {
    box-shadow: var(--sh3);
    border-color: var(--br1);
    transition: all .2s var(--ease-expo);
}

/* ── Risk gauge container (c4) ── */
.risk-gauge-container {
    height: 185px;
    position: relative;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.risk-gauge-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ── Top threats container (c5) ── */
.threats-chart-container {
    height: 185px;
    position: relative;
    padding: 8px;
}

.threats-chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* ── Donut center text ── */
.donut-center {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
}

.donut-center-value {
    display: block;
    font-family: var(--m);
    font-size: 18px;
    font-weight: 700;
    color: var(--t0);
    line-height: 1;
}

.donut-center-label {
    display: block;
    font-size: 8px;
    color: var(--t3);
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-top: 3px;
}