#arc-v4-app {
    font-family: inherit;
    max-width: 1200px;
    margin: 20px auto;
    color: #222;
}

.arc-controls {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.arc-controls input,
.arc-controls select {
    padding: 10px 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
}

.arc-controls input {
    flex: 1;
    min-width: 240px;
}

.arc-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 24px;
    align-items: start;
}

@media (max-width: 850px) {
    .arc-layout {
        grid-template-columns: 1fr;
    }
}

.arc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    max-height: 680px;
    overflow-y: auto;
    padding-right: 6px;
}

.arc-card {
    border: 2px solid transparent;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
    transition: transform 0.15s, border-color 0.15s;
}

.arc-card:hover {
    transform: translateY(-2px);
}

.arc-card.active {
    border-color: #0056b3;
    box-shadow: 0 4px 10px rgba(0, 86, 179, 0.25);
}

.arc-swatch {
    height: 70px;
    width: 100%;
}

.arc-info {
    padding: 8px;
    font-size: 12px;
}

.arc-code {
    font-weight: 700;
    display: block;
    margin-bottom: 2px;
}

.arc-name {
    color: #555;
    display: block;
    line-height: 1.2;
}

.arc-sidebar {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #e2e6ea;
    position: sticky;
    top: 20px;
}

.arc-sidebar h3 {
    margin-top: 0;
    font-size: 18px;
}

.arc-preview {
    height: 80px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10px;
    font-weight: 700;
    margin-bottom: 14px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: #e9ecef;
    transition: background 0.2s;
}

.arc-sidebar label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin: 10px 0 4px;
}

.arc-sidebar input,
.arc-sidebar select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
}

.arc-price-box {
    background: #eef4fc;
    border: 1px solid #c9dff8;
    border-radius: 8px;
    padding: 12px;
    margin-top: 14px;
}

.arc-price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
}

.arc-price-row strong {
    font-size: 20px;
    color: #0056b3;
}

.arc-price-hint {
    font-size: 12px;
    color: #555;
    margin-top: 4px;
}

#arc-add-cart-btn {
    width: 100%;
    margin-top: 14px;
    padding: 12px;
    background: #0056b3;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

#arc-add-cart-btn:hover {
    background: #004494;
}

#arc-status {
    margin-top: 12px;
    font-size: 13px;
    font-weight: 600;
}

#arc-status a {
    color: #0056b3;
    text-decoration: underline;
    margin-left: 6px;
}
.arc-input-unit {
    position: relative;
    display: flex;
    align-items: center;
}

.arc-input-unit input {
    padding-right: 34px;
}

.arc-input-unit span {
    position: absolute;
    right: 12px;
    color: #555;
    font-size: 14px;
    font-weight: 600;
    pointer-events: none;
}