:root {
    --blue-50: #f0f7ff;
    --blue-100: #e0efff;
    --blue-200: #cde3ff;
    --blue-300: #a9d0ff;
    --blue-400: #6fb2ff;
    --blue-500: #3994ff;
    --blue-600: #167dff;
    --blue-700: #0e64d6;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --danger: #ef4444;
    --shadow: 0 4px 16px rgba(2, 6, 23, 0.05);
    --shadow-hover: 0 6px 20px rgba(2, 6, 23, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    background: var(--bg-alt);
    color: var(--text);
    line-height: 1.5;
}

.container {
    max-width: 980px;
    margin: 24px auto;
    padding: 16px;
}

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

.title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 0.3px;
    color: #0b3b83;
}

.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 24px;
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    margin-bottom: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.row:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.thumb {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    border: 1px solid var(--border);
    object-fit: cover;
    background: var(--blue-50);
    flex-shrink: 0;
}

.info {
    flex: 1;
    min-width: 0;
}

.name {
    font-size: 16px;
    font-weight: 700;
    color: #0b3b83;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.meta {
    font-size: 12px;
    color: var(--muted);
    margin-top: 4px;
}

.price {
    margin-top: 6px;
    font-size: 14px;
    font-weight: 700;
    color: #0b3b83;
}

.qty-input {
    width: 80px;
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 10px;
    text-align: center;
    font-size: 14px;
    transition: border-color 0.2s ease;
}

.qty-input:focus {
    outline: none;
    border-color: var(--blue-500);
}

.btn {
    appearance: none;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn.primary {
    background: linear-gradient(180deg, var(--blue-500), var(--blue-600));
    color: #fff;
    border-color: transparent;
}

.btn.primary:hover {
    filter: brightness(1.05);
}

.btn.ghost {
    background: transparent;
    border-color: var(--blue-500);
    color: var(--blue-500);
}

.btn.danger {
    border-color: transparent;
    background: linear-gradient(180deg, #f87171, var(--danger));
    color: #fff;
}

.toolbar {
    display: flex;
    gap: 8px;
    align-items: center;
}

.summary {
    display: flex;
    gap: 16px;
    align-items: center;
    justify-content: flex-end;
    margin-top: 24px;
}

.subtotal {
    font-size: 18px;
    font-weight: 800;
    color: #0b3b83;
}

.empty {
    padding: 32px;
    text-align: center;
    color: var(--muted);
    background: var(--bg);
    border: 1px dashed var(--border);
    border-radius: 14px;
    font-size: 16px;
}

.hr {
    height: 1px;
    background: var(--border);
    margin: 16px 0;
}

@media (max-width: 640px) {
    .container {
        padding: 12px;
    }

    .title {
        font-size: 24px;
    }

    .row {
        flex-wrap: wrap;
        gap: 12px;
        padding: 12px;
    }

    .thumb {
        width: 64px;
        height: 64px;
    }

    .summary {
        flex-direction: column;
        align-items: flex-end;
        gap: 12px;
    }

    .btn {
        padding: 8px 12px;
        font-size: 13px;
    }

    .qty-input {
        width: 70px;
        padding: 6px;
    }
}