:root {
    color-scheme: dark;
    --bg: #0f1115;
    --surface: #1a1d24;
    --surface-2: #242833;
    --border: #2e3340;
    --text: #f1f3f7;
    --text-dim: #9aa3b2;
    --text-faint: #6b7585;
    --accent: #4a9eff;
    --accent-dim: #1a3d66;
    --success: #3ecf8e;
    --success-dim: #14432e;
    --warning: #f5a524;
    --warning-dim: #4a3409;
    --danger: #f5525c;
    --danger-dim: #4a1519;
    --radius: 12px;
    --radius-sm: 8px;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    min-height: 100dvh;
    overscroll-behavior: none;
}

body {
    padding: env(safe-area-inset-top) env(safe-area-inset-right)
             env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.view { display: none; }
.view.active { display: block; }

.app {
    max-width: 540px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
}

header.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 0.5px solid var(--border);
}

.topbar .title { font-weight: 500; font-size: 17px; }
.topbar .user { font-size: 13px; color: var(--text-dim); }
.topbar a { color: var(--accent); text-decoration: none; font-size: 13px; }

h1 { font-size: 20px; font-weight: 500; margin: 0 0 16px; }
h2 { font-size: 14px; font-weight: 500; margin: 20px 0 8px; color: var(--text-dim);
     text-transform: uppercase; letter-spacing: 0.04em; }

input[type="text"], input[type="password"], textarea {
    width: 100%;
    background: var(--surface-2);
    color: var(--text);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    font-size: 17px;
    font-family: inherit;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}
input[type="text"]:focus, input[type="password"]:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-dim);
}

label {
    display: block;
    font-size: 12px;
    color: var(--text-dim);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

button {
    font-family: inherit;
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: 0.5px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    padding: 14px 16px;
    cursor: pointer;
    min-height: 48px;
    transition: transform 60ms ease, background 120ms ease;
}
button:active:not(:disabled) { transform: scale(0.98); }
button:disabled { opacity: 0.4; cursor: not-allowed; }

button.primary {
    background: var(--accent);
    color: #041828;
    border-color: var(--accent);
}
button.success {
    background: var(--success);
    color: #062e1e;
    border-color: var(--success);
}
button.danger {
    background: transparent;
    color: var(--danger);
    border-color: var(--danger-dim);
}
button.ghost { background: transparent; }

.pill {
    display: inline-block;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 100px;
    background: var(--accent-dim);
    color: var(--accent);
}
.pill.success { background: var(--success-dim); color: var(--success); }
.pill.warning { background: var(--warning-dim); color: var(--warning); }
.pill.danger { background: var(--danger-dim); color: var(--danger); }

.card {
    background: var(--surface);
    border: 0.5px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    margin-bottom: 12px;
}

.stack { display: flex; flex-direction: column; gap: 8px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.grow { flex: 1; min-width: 0; }

.tracking-display {
    font-family: var(--mono);
    font-size: 16px;
    font-weight: 500;
    word-break: break-all;
}
.tracking-empty { color: var(--text-faint); }

.sku-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--surface);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    gap: 12px;
}
.sku-row.unknown {
    border-color: var(--warning-dim);
    background: var(--surface);
}
.sku-name { font-size: 15px; font-weight: 500; }
.sku-barcode { font-family: var(--mono); font-size: 12px; color: var(--text-dim); }
.sku-qty {
    font-size: 22px;
    font-weight: 500;
    min-width: 32px;
    text-align: right;
}

.qty-controls {
    display: flex;
    gap: 6px;
    align-items: center;
}
.qty-btn {
    min-height: 36px;
    min-width: 36px;
    padding: 0;
    font-size: 18px;
    line-height: 1;
}

.empty-state {
    padding: 24px 14px;
    text-align: center;
    font-size: 14px;
    color: var(--text-faint);
    background: var(--surface);
    border: 0.5px dashed var(--border);
    border-radius: var(--radius-sm);
}

.scanner-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 12px;
}
.scanner-wrap video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.scanner-reticle {
    position: absolute;
    inset: 20% 10%;
    border: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    pointer-events: none;
    box-shadow: 0 0 0 9999px rgba(0,0,0,0.35);
}

.bottom-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 14px;
}

.toast {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(24px + env(safe-area-inset-bottom));
    background: var(--surface-2);
    border: 0.5px solid var(--border);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 100px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 200ms ease;
    pointer-events: none;
    z-index: 50;
    max-width: 80vw;
    text-align: center;
}
.toast.show { opacity: 1; }
.toast.success { background: var(--success-dim); color: var(--success); border-color: var(--success-dim); }
.toast.warning { background: var(--warning-dim); color: var(--warning); border-color: var(--warning-dim); }
.toast.danger { background: var(--danger-dim); color: var(--danger); border-color: var(--danger-dim); }

.login-wrap {
    max-width: 360px;
    margin: 10vh auto 0;
    padding: 24px 16px;
}
.login-wrap h1 { text-align: center; margin-bottom: 24px; }

.history-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    background: var(--surface);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}
.history-row .tn { font-family: var(--mono); font-size: 13px; }
.history-row .meta { font-size: 11px; color: var(--text-dim); }

.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 14px;
    padding: 4px;
    background: var(--surface);
    border-radius: var(--radius-sm);
    border: 0.5px solid var(--border);
}
.tab {
    flex: 1;
    text-align: center;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-dim);
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    background: transparent;
    font-weight: 500;
    min-height: 36px;
}
.tab.active { background: var(--surface-2); color: var(--text); }

/* --- SKU admin -------------------------------------------------------- */

.sku-admin-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    background: var(--surface);
    border: 0.5px solid var(--border);
    border-radius: var(--radius-sm);
    gap: 12px;
    cursor: pointer;
}
.sku-admin-row:active { transform: scale(0.99); }
.sku-admin-row.inactive { opacity: 0.5; }

.sku-admin-row .name { font-size: 15px; font-weight: 500; }
.sku-admin-row .meta { font-size: 12px; color: var(--text-dim); }
.sku-admin-row .bc   { font-family: var(--mono); font-size: 12px; color: var(--text-dim); }

.pill.muted { background: var(--surface-2); color: var(--text-dim); }

.sku-row .catalog-btn {
    min-height: 32px;
    padding: 4px 10px;
    font-size: 12px;
    background: var(--warning-dim);
    color: var(--warning);
    border-color: var(--warning-dim);
}
.sku-row .tracking-hint {
    font-size: 11px;
    color: var(--text-faint);
    font-style: italic;
}