/* =====================================================
   0G Storage - Real-Time Metrics
   ===================================================== */

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.metric-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    overflow: hidden;
    transition: var(--transition-normal);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.metric-card:hover {
    border-color: var(--color-purple-300);
    box-shadow: var(--shadow-lg);
}

.metric-card:hover::before {
    opacity: 1;
}


/* Header */
.metric-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.metric-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

.metric-status {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

.metric-status.live {
    color: var(--color-success);
}

.metric-status.live i {
    font-size: 6px;
    animation: live-blink 1.5s ease-in-out infinite;
}

@keyframes live-blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

/* Chart */
.metric-chart {
    height: 48px;
    margin-bottom: var(--space-4);
    position: relative;
}

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

/* Value */
.metric-value {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.metric-number {
    font-family: var(--font-mono);
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    line-height: 1;
    transition: var(--transition-fast);
}

.metric-unit {
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--text-muted);
}

/* Change indicator */
.metric-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.metric-change.positive {
    color: var(--color-success);
    background: var(--color-success-light);
}

.metric-change.negative {
    color: var(--color-error);
    background: var(--color-error-light);
}

.metric-change i {
    font-size: var(--text-xs);
}

/* Secondary metric */
.metric-secondary {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-top: var(--space-2);
}

.metric-secondary span {
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
}

/* Loading state */
.metric-card.loading .metric-number,
.metric-card.loading .metric-secondary span {
    background: linear-gradient(
        90deg,
        var(--color-gray-200) 0%,
        var(--color-gray-100) 50%,
        var(--color-gray-200) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
    color: transparent;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Number animation */
.metric-number.updating {
    animation: number-pop 0.3s ease-out;
}

@keyframes number-pop {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
        color: var(--color-purple-700);
    }
    100% {
        transform: scale(1);
    }
}

/* ==================== Responsive ==================== */
@media (max-width: 1024px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .metric-card:last-child {
        grid-column: 1 / -1;
        max-width: 400px;
        margin: 0 auto;
        width: 100%;
    }
}

@media (max-width: 640px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .metric-card:last-child {
        max-width: none;
    }

    .metric-number {
        font-size: var(--text-2xl);
    }
}