:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --success: #10b981;
    --danger: #ef4444;
    --glass-border: 1px solid rgba(255, 255, 255, 0.1);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 16px;
    -webkit-tap-highlight-color: transparent;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--card-bg);
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    border-radius: 16px;
    padding: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.glass-input {
    background: rgba(15, 23, 42, 0.6);
    border: var(--glass-border);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    outline: none;
    font-size: 14px;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.card h3 {
    margin: 0 0 8px 0;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.card .value {
    font-size: 18px;
    font-weight: 700;
}

.card .trend {
    font-size: 10px;
    color: var(--success);
    margin-top: 4px;
}

.charts-section {
    margin-bottom: 24px;
}

.top-sku h3 {
    margin-bottom: 12px;
}

.sku-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sku-info {
    display: flex;
    flex-direction: column;
}

.sku-name {
    font-weight: 600;
    font-size: 14px;
}

.sku-id {
    font-size: 12px;
    color: var(--text-secondary);
}

.sku-val {
    font-weight: 700;
    color: var(--accent);
}

/* ABC Analysis */
.abc-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.abc-group h4 {
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

#abc-a h4 { color: #10b981; } /* Green */
#abc-b h4 { color: #f59e0b; } /* Orange */
#abc-c h4 { color: #ef4444; } /* Red */

.abc-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 13px;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.abc-item:last-child {
    border-bottom: none;
}

.clickable {
    cursor: pointer;
    transition: background 0.2s;
}

.clickable:active {
    background: rgba(255,255,255,0.05);
}

/* SKU Grid */
.sku-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.sku-card {
    background: var(--card-bg);
    border: var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    transition: transform 0.2s;
    text-decoration: none;
    display: block;
}

.sku-card:active {
    transform: scale(0.98);
}

.sku-img-container {
    width: 100%;
    aspect-ratio: 3/4;
    overflow: hidden;
    position: relative;
    background: #2a303c; /* Placeholder styling */
}

.sku-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0; 
    transition: opacity 0.3s;
}

.sku-img.loaded {
    opacity: 1;
}

.sku-card-info {
    padding: 10px;
    background: linear-gradient(0deg, rgba(15,23,42,0.95) 0%, rgba(15,23,42,0.7) 100%);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    backdrop-filter: blur(4px);
}

.sku-card-price {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 14px;
}

.sku-card-name {
    font-size: 10px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

/* Charts */
.chart-container-abc {
    height: 250px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 16px;
    position: relative;
}

.hidden { display: none; }