:root {
    --bg:#f5f6f8; --card:#fff; --border:#e2e5ea;
    --text:#1f2937; --muted:#6b7280;
    --primary:#2563eb; --primary-hover:#1e4fc7;
    --error:#b91c1c; --ok:#15803d;
    --warn:#b45309; --warn-bg:#fffbeb;
    --lot:#7c3aed;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    color: var(--text);
    background: var(--bg);
}
body.centered {
    display: flex; min-height: 100vh;
    align-items: center; justify-content: center;
}

/* Sandbox banner */
.env-banner {
    background: #fef3c7;
    color: #78350f;
    border-bottom: 2px solid #f59e0b;
    padding: .55rem 1rem;
    text-align: center;
    font-weight: 600;
    letter-spacing: .02em;
}
.env-banner.demo {
    background: #fee2e2;
    color: #7f1d1d;
    border-bottom-color: #dc2626;
}
.env-banner a {
    color: inherit;
    margin-left: 1rem;
    text-decoration: underline;
}
body.sandbox .topbar { border-top: none; }
body.demo    .topbar { border-top: none; }

.topbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1rem 1.5rem;
    background: #fff; border-bottom: 1px solid var(--border);
}
.topbar h1 { margin: 0; font-size: 1.1rem; }
.topbar .user { color: var(--muted); font-size: .9rem; }
.topbar a { color: var(--primary); text-decoration: none; }
.topbar a:hover { text-decoration: underline; }

.card {
    background: var(--card);
    padding: 1.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 1.5rem auto;
    max-width: 900px;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.card.login { width: 360px; margin: 0; }

h1, h2 { margin: 0 0 1rem; }
h2 { font-size: 1rem; margin-top: 1.5rem; }

label { display: block; margin: .75rem 0; font-size: .85rem; color: var(--muted); }
input, select, button { font: inherit; }
input, select {
    width: 100%;
    padding: .55rem .7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text); background: #fff;
    margin-top: .25rem;
}
input:focus, select:focus {
    outline: 2px solid var(--primary); outline-offset: -1px;
    border-color: var(--primary);
}
input:disabled, select:disabled { background: #f3f4f6; color: var(--muted); }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr; } }

.hint { color: var(--muted); font-size: .85rem; margin: .25rem 0; }

button {
    padding: .55rem 1rem;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    color: var(--text);
}
button:hover:not(:disabled) { background: #f8fafc; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary {
    background: var(--primary); color: #fff; border-color: var(--primary);
}
button.primary:hover:not(:disabled) { background: var(--primary-hover); }
button.remove {
    padding: .15rem .5rem; line-height: 1;
    color: var(--muted); font-size: 1.1rem;
    border-color: transparent;
}
button.remove:hover:not(:disabled) { color: var(--error); background: transparent; }
button.link {
    background: none; border: none; color: var(--primary);
    padding: 0 .25rem; text-decoration: underline; cursor: pointer;
}

.actions { display: flex; gap: 1rem; align-items: center; margin-top: 1.25rem; }
.error { color: var(--error); }
.ok    { color: var(--ok); }

/* Lines */
.line {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: .75rem;
    margin-bottom: .75rem;
    background: #fafbfc;
}
.line-row {
    display: grid;
    grid-template-columns: 1fr 8rem 2.5rem;
    gap: .5rem;
    align-items: start;
}
.qty-cell input { margin-top: 0; }

.sku-cell { position: relative; }
.sku-input-row {
    display: grid;
    grid-template-columns: 1fr 2.5rem;
    gap: .35rem;
    align-items: stretch;
}
.sku-input-row input { margin-top: 0; }
.sku-input-row .scan-sku {
    padding: 0;
    line-height: 1;
}
.suggest {
    position: absolute; left: 0; right: 0; top: 100%; z-index: 5;
    background: #fff; border: 1px solid var(--border); border-radius: 6px;
    margin-top: .25rem; max-height: 16rem; overflow: auto;
    box-shadow: 0 4px 12px rgba(0,0,0,.06);
}
.suggest .opt { padding: .4rem .6rem; cursor: pointer; }
.suggest .opt:hover { background: #eef2ff; }
.suggest .opt strong { color: var(--primary); }
.suggest .opt .avail {
    color: var(--muted); font-size: .8rem; margin-left: .5rem;
}
.suggest .empty { padding: .4rem .6rem; color: var(--muted); }

.picked {
    padding: .55rem .7rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    display: flex; align-items: center; gap: .5rem; flex-wrap: wrap;
}
.picked .avail { color: var(--muted); font-size: .85rem; }

.badge {
    display: inline-block; padding: 0 .4rem; border-radius: 4px;
    font-size: .7rem; font-weight: 600; letter-spacing: .03em;
}
.badge.lot { background: #ede9fe; color: var(--lot); }

.memo { margin-top: 1rem; }

/* Lot section under a line */
.lots-section {
    margin-top: .75rem;
    border-top: 1px dashed var(--border);
    padding-top: .75rem;
}
.lots-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: .5rem;
    font-size: .85rem; color: var(--muted); font-weight: 600;
    text-transform: uppercase; letter-spacing: .03em;
}
.lots-header button { padding: .25rem .55rem; font-size: .8rem; }

.lot-row {
    display: grid;
    grid-template-columns: 1fr 7rem 2.5rem 2.5rem;
    gap: .5rem;
    margin-bottom: .35rem;
    align-items: center;
}
.lot-row select, .lot-row input { margin-top: 0; }
.lot-row .scan, .lot-row .remove-lot {
    padding: .4rem .55rem; line-height: 1;
}
.lot-totals { text-align: right; margin-top: .25rem; }

@media (max-width: 600px) {
    .line-row    { grid-template-columns: 1fr 5rem 2.5rem; }
    .lot-row     { grid-template-columns: 1fr 4rem 2.25rem 2.25rem; }
}

/* Scanner modal */
.modal {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.65);
    display: flex; align-items: center; justify-content: center;
    z-index: 100; padding: 1rem;
}
.modal[hidden] { display: none; }
.modal-inner {
    background: #fff; border-radius: 8px; max-width: 480px; width: 100%;
    overflow: hidden;
}
.modal-inner header {
    display: flex; justify-content: space-between; align-items: center;
    padding: .6rem 1rem; border-bottom: 1px solid var(--border);
}
.modal-inner header h3 { margin: 0; font-size: 1rem; }
.modal-inner .close {
    background: none; border: none; font-size: 1.4rem;
    color: var(--muted); cursor: pointer; padding: 0 .25rem;
}
#scanVideo {
    width: 100%;
    display: block;
    background: #000;
    /* Crop to fill the viewport rather than letterboxing — gives the user
       a tighter strip to aim at instead of a tall portrait frame. */
    height: 38vh;
    max-height: 320px;
    object-fit: cover;
}
.scan-viewport {
    position: relative;
    background: #000;
    overflow: hidden;
}
/* Highlighted target rectangle — narrow horizontal band, dimmed surroundings */
.scan-frame {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.scan-frame::before {
    content: "";
    position: absolute;
    left: 8%;
    right: 8%;
    top: 50%;
    height: 28%;
    transform: translateY(-50%);
    border: 2px solid rgba(255,255,255,.85);
    border-radius: 8px;
    /* dim everything outside the target rectangle */
    box-shadow: 0 0 0 9999px rgba(0,0,0,.55);
}
.scan-line {
    position: absolute;
    left: 10%;
    right: 10%;
    top: 50%;
    height: 2px;
    background: #ef4444;
    box-shadow: 0 0 6px rgba(239,68,68,.7);
    animation: scan-pulse 1.4s ease-in-out infinite;
}
@keyframes scan-pulse {
    0%,100% { opacity: .55; }
    50%     { opacity: 1;   }
}
.modal-inner .hint { padding: .6rem 1rem; }