*, *::before, *::after { box-sizing: border-box; }

#cart-drawer {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    justify-content: flex-end;
}

#cart-drawer[hidden] { display: none; }

.drawer-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.drawer-panel {
    position: relative;
    width: 100%;
    max-width: min(420px, 100vw);
    height: 100%;
    background: #fff;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

#cart-drawer:not([hidden]) .drawer-panel { transform: translateX(0); }

.drawer-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid #eee;
}

.drawer-title { font-size: 18px; font-weight: 600; margin: 0; }

.drawer-close {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    color: #666;
    line-height: 1;
}

.drawer-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.drawer-product-row { display: flex; gap: 12px; align-items: flex-start; }

.drawer-main-img {
    width: 88px;
    height: 88px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
    border: 1px solid #eee;
}

.drawer-product-meta { flex: 1; min-width: 0; }

.drawer-product-name {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 4px;
    line-height: 1.4;
    word-break: break-word;
}

.drawer-sku-label { font-size: 12px; color: #888; margin: 0; }

.drawer-variants { display: flex; flex-wrap: wrap; gap: 8px; }

.variant-thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: 6px;
    border: 2px solid #eee;
    cursor: pointer;
    transition: border-color .15s;
}

.variant-thumb.active { border-color: #222; }

.drawer-qty-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.drawer-qty-label { font-size: 14px; color: #555; }

.drawer-qty-ctrl {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
}

.qty-btn {
    width: 36px;
    height: 36px;
    background: #f5f5f5;
    border: none;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qty-btn:active { background: #e0e0e0; }

.qty-value {
    width: 40px;
    text-align: center;
    font-size: 15px;
    font-weight: 600;
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
    line-height: 36px;
}

.drawer-price-breakdown {
    background: #f9f9f9;
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.price-row {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: #555;
}

.price-row--total {
    font-size: 16px;
    font-weight: 700;
    color: #111;
    border-top: 1px solid #eee;
    padding-top: 8px;
    margin-top: 4px;
}

.drawer-footer {
    flex-shrink: 0;
    padding: 16px 20px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    border-top: 1px solid #eee;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.btn-pay {
    width: 100%;
    padding: 15px;
    background: #222;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background .2s;
}

.btn-pay:hover { background: #444; }
.btn-pay:disabled { background: #999; cursor: not-allowed; }

.drawer-secure-note { text-align: center; font-size: 12px; color: #888; margin: 0; }

.drawer-error {
    font-size: 13px;
    color: #c0392b;
    background: #fdecea;
    border-radius: 6px;
    padding: 8px 12px;
    margin: 0;
    text-align: center;
}