:root {
    --bg:#f1f3f6;
    --panel:#ffffff;
    --text:#222;
    --border:#d1d5db;
    --top:#1f2937;

    --item:#e0f2fe;
    --bundle:#ede9fe;
    --offer:#fff7ed;
}

body.dark {
    --bg:#0f172a;
    --panel:#111827;
    --text:#e5e7eb;
    --border:#374151;
    --top:#020617;

    --item:#1e40af;
    --bundle:#5b21b6;
    --offer:#78350f;
}

* { box-sizing:border-box; }

body {
    margin:0;
    font-family:Arial, sans-serif;
    background:var(--bg);
    color:var(--text);
}

/* ---------- Topbar ---------- */

.topbar {
    background:var(--top);
    color:#fff;
    padding:14px 20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}
.toolbar-sep {
    width: 1px;
    height: 24px;
    background: #ccc;
    margin: 0 6px;
}


/* ---------- Layout ---------- */

main {
    max-width:1100px;
    margin:auto;
    padding:20px;
}

.panel {
    background:var(--panel);
    border-radius:8px;
    padding:16px;
    margin-bottom:20px;
}

.panel-header {
    display:flex;
    justify-content:space-between;
    align-items:center;
}

.stack > * + * { margin-top:12px; }

/* ---------- Cards ---------- */

.product,
.offer {
    border-radius:6px;
    border:1px solid var(--border);
    overflow:hidden;
}

.product.item { background:var(--item); }
.product.bundle { background:var(--bundle); }
.offer { background:var(--offer); }

/* ---------- Card Header ---------- */

.card-header {
    padding:10px 14px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    font-weight:bold;
    cursor:pointer;
    user-select:none;
}

.card-header .chevron {
    font-size:12px;
    opacity:.7;
}

/* ---------- Card Body ---------- */

.card-body {
    background:var(--panel);
    padding:14px;
    position:relative;
}

.card.collapsed .card-body {
    display:none;
}

/* ---------- Actions ---------- */

.card-actions {
    position:absolute;
    top:14px;
    right:14px;
    display:flex;
    flex-direction:column;
    gap:6px;
}

/* ---------- Rows ---------- */

.row {
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:8px;
}

.row b { width:170px; }

/* ---------- Inputs ---------- */

input, select {
    padding:6px 8px;
    border-radius:4px;
    border:1px solid var(--border);
    min-width:220px;
}

/* ---------- Date ---------- */

.date-inline select {
    width:70px;
    margin-right:6px;
}

/* ---------- Buttons ---------- */

button, .secondary {
    border:none;
    border-radius:4px;
    padding:6px 10px;
    cursor:pointer;
}

.primary { background:#2563eb; color:#fff; }
.secondary { background:#e5e7eb; }
.danger { background:#dc2626; color:#fff; }

/* ---------- Footer ---------- */

footer {
    text-align:center;
    font-size:12px;
    padding:10px;
    opacity:.6;
}