/* Part 2: Cards and Chart Styles */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.summary-card {
    position: relative;
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
    /* GPU acceleration for smooth animations */
    will-change: transform;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.summary-card:hover {
    transform: translateY(-4px) translateZ(0);
    border-color: var(--border-color-hover);
}

.variant-jumbo::before {
    background: linear-gradient(90deg, var(--color-jumbo), var(--color-jumbo-light));
}

.variant-jumbo:hover {
    box-shadow: 0 8px 40px var(--color-jumbo-glow);
}

.variant-delight::before {
    background: linear-gradient(90deg, var(--color-delight), var(--color-delight-light));
}

.variant-delight:hover {
    box-shadow: 0 8px 40px var(--color-delight-glow);
}

.variant-hobby::before {
    background: linear-gradient(90deg, var(--color-hobby), var(--color-hobby-light));
}

.variant-hobby:hover {
    box-shadow: 0 8px 40px var(--color-hobby-glow);
}

.card-header {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.card-badge {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    background: var(--color-bg-glass);
    color: var(--color-text-tertiary);
}

.card-body {
    margin-bottom: var(--space-lg);
}

.price-display {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.currency {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.price-value {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: var(--font-mono);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.variant-jumbo .price-value {
    color: var(--color-jumbo-light);
}

.variant-delight .price-value {
    color: var(--color-delight-light);
}

.variant-hobby .price-value {
    color: var(--color-hobby-light);
}

.price-change {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-xs);
}

.change-value {
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

.change-label {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

.card-footer {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.stat-value {
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-text-primary);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.chart-tabs {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-xs);
    background: var(--color-bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    width: fit-content;
}

.tab-btn {
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-glass);
}

.tab-btn.active {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}

.chart-container {
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.chart-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.time-range-selector {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-xs);
    background: var(--color-bg-glass);
    border-radius: var(--radius-sm);
}

.range-btn {
    padding: var(--space-xs) var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-tertiary);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.range-btn.active {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}

.chart-wrapper {
    position: relative;
    height: 400px;
}

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

.chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}