* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --brand: #C4123C;
    --bg: #0a0a0a;
    --bg-card: #18181b;       /* zinc-900 */
    --bg-card-alt: #1f1f23;
    --bg-hover: #27272a;      /* zinc-800 */
    --fg: #ededed;
    --fg-muted: #a1a1aa;      /* zinc-400 */
    --fg-dim: #71717a;        /* zinc-500 */
    --border: #3f3f46;        /* zinc-700 */
    --border-light: #52525b;  /* zinc-600 */
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--fg);
    min-height: 100vh;
}

/* ── Login ── */
.login-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-overlay.hidden { display: none !important; }

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 48px;
    width: 380px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    text-align: center;
}

.login-card h1 {
    color: var(--brand);
    font-size: 1.6rem;
    margin-bottom: 32px;
}

.login-card h1 span {
    font-weight: 300;
    color: var(--fg);
}

.login-card input {
    display: block;
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    background: var(--bg);
    color: var(--fg);
    transition: border-color 0.2s;
}

.login-card input:focus {
    border-color: var(--brand);
}

.login-card button {
    width: 100%;
    padding: 12px;
    background: var(--brand);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin-top: 8px;
    transition: filter 0.2s;
}

.login-card button:hover { filter: brightness(1.15); }

.login-error {
    color: var(--danger);
    margin-top: 12px;
    font-size: 0.9rem;
    min-height: 1.2em;
}

/* ── Header ── */
header {
    background: var(--bg-card);
    padding: 12px 32px;
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1500px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

header h1 {
    color: var(--brand);
    font-size: 1.3rem;
    font-weight: 700;
}

header h1 span {
    font-weight: 300;
    color: var(--fg-muted);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-badge {
    color: var(--fg-muted);
    font-size: 0.8rem;
    padding: 4px 12px;
    background: var(--bg-hover);
    border-radius: 20px;
    border: 1px solid var(--border);
}

.btn-small {
    padding: 6px 14px;
    background: transparent;
    color: var(--fg-muted);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-small:hover {
    background: var(--bg-hover);
    color: var(--fg);
    border-color: var(--border-light);
}

.btn-logout:hover {
    border-color: var(--brand);
    color: var(--brand);
}

main {
    max-width: 1500px;
    margin: 0 auto;
    padding: 20px 24px;
}

/* ── Search ── */
.search-section { margin-bottom: 20px; }

.search-box {
    display: flex;
    gap: 10px;
    max-width: 550px;
}

.search-box input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    outline: none;
    background: var(--bg-card);
    color: var(--fg);
    transition: border-color 0.2s;
}

.search-box input:focus { border-color: var(--brand); }

.search-box button {
    padding: 10px 20px;
    background: var(--brand);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: filter 0.2s;
    white-space: nowrap;
}

.search-box button:hover { filter: brightness(1.15); }

.btn-add {
    background: var(--bg-hover);
    color: var(--fg-muted);
    border: 1px solid var(--border);
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-add:hover {
    background: var(--border);
    color: var(--fg);
}

.search-results {
    max-width: 550px;
    margin-top: 4px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    display: none;
    position: absolute;
    z-index: 10;
}

.search-results.active { display: block; }

.search-result-item {
    padding: 10px 14px;
    cursor: pointer;
    border-bottom: 1px solid var(--border);
    transition: background 0.15s;
}

.search-result-item:hover { background: var(--bg-hover); }
.search-result-item:last-child { border-bottom: none; }

.search-result-item .ipn {
    font-weight: 600;
    color: var(--brand);
}

.search-result-item .name {
    color: var(--fg-muted);
    font-size: 0.85rem;
}

.status { margin-top: 10px; font-size: 0.85rem; }
.status.loading { color: var(--fg-muted); }
.status.error { color: var(--danger); }
.status.success { color: var(--success); }

/* ── Assembly Info ── */
.assembly-info {
    background: var(--bg-card);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 20px;
    border-left: 3px solid var(--brand);
    border: 1px solid var(--border);
    border-left: 3px solid var(--brand);
}

.assembly-info h2 {
    font-size: 1.15rem;
    color: var(--fg);
}

.assembly-info p {
    color: var(--fg-muted);
    margin-top: 4px;
    font-size: 0.9rem;
}

/* ── Calculation Summary — 8 cards in one row ── */
.calc-section { margin-bottom: 20px; }

.calc-section h3, .otc-section h3, .bom-section h3, .notes-section h3 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--fg-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 10px;
}

@media (max-width: 1200px) {
    .calc-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 700px) {
    .calc-grid { grid-template-columns: repeat(2, 1fr); }
}

.calc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.calc-card label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--fg-dim);
    font-weight: 600;
}

.calc-card input {
    font-size: 1.15rem;
    font-weight: 700;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 8px;
    width: 100%;
    outline: none;
    background: var(--bg);
    color: var(--fg);
    -moz-appearance: textfield;
}

.calc-card input::-webkit-outer-spin-button,
.calc-card input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.calc-card input:focus { border-color: var(--brand); }

.calc-value {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--fg);
}

/* Grand Total card */
.calc-card.grand-total {
    background: var(--bg-hover);
    border-color: var(--fg-dim);
}

.calc-card.grand-total .calc-value {
    color: var(--fg);
}

/* Markup card */
.markup-card {
    border-color: var(--brand) !important;
}

.markup-card input {
    color: var(--brand);
}

/* Selling price card */
.selling-card {
    background: var(--brand);
    border-color: var(--brand);
}

.selling-card label { color: rgba(255,255,255,0.7); }
.selling-card .calc-value { color: white; font-size: 1.2rem; }

/* Profit card */
.profit-card {
    background: #166534;
    border-color: #16a34a;
}

.profit-card label { color: rgba(255,255,255,0.7); }
.profit-card .calc-value { color: #bbf7d0; }

/* ── Notes ── */
.notes-section { margin-bottom: 20px; }

.notes-section textarea {
    width: 100%;
    max-width: 800px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    resize: vertical;
    background: var(--bg-card);
    color: var(--fg);
    transition: border-color 0.2s;
}

.notes-section textarea:focus { border-color: var(--brand); }

/* ── OTC Table ── */
.otc-section { margin-bottom: 20px; }

.otc-table {
    width: 100%;
    max-width: 600px;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.otc-table th {
    background: var(--bg-hover);
    color: var(--fg-muted);
    padding: 8px 12px;
    text-align: left;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.otc-table td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--border);
}

.otc-table input {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    outline: none;
    background: var(--bg);
    color: var(--fg);
}

.otc-table input:focus { border-color: var(--brand); }

.btn-remove {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px;
    opacity: 0.7;
}

.btn-remove:hover { opacity: 1; }

/* ── BOM Table ── */
.bom-section { margin-bottom: 20px; overflow-x: auto; }

.bom-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}

.bom-header-row h3 { margin-bottom: 0; }

.bom-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    font-size: 0.85rem;
}

.bom-table th {
    background: var(--bg-hover);
    color: var(--fg-muted);
    padding: 8px 10px;
    text-align: left;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    border-bottom: 1px solid var(--border);
}

.bom-table td {
    padding: 7px 10px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.bom-table tbody tr:nth-child(even) {
    background: var(--bg-card-alt);
}

.bom-table tbody tr:hover {
    background: var(--bg-hover);
}

/* Price input: no spin buttons, select all on focus */
.bom-table .price-input {
    width: 100px;
    padding: 5px 7px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    text-align: right;
    outline: none;
    background: var(--bg);
    color: var(--fg);
    -moz-appearance: textfield;
}

.bom-table .price-input::-webkit-outer-spin-button,
.bom-table .price-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.bom-table .price-input:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 1px rgba(196,18,60,0.3);
}

.bom-table .price-input.manual {
    border-color: var(--warning);
    background: rgba(234,179,8,0.08);
}

.bom-table .qty-input {
    width: 55px;
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    text-align: center;
    outline: none;
    background: var(--bg);
    color: var(--fg);
    -moz-appearance: textfield;
}

.bom-table .qty-input::-webkit-outer-spin-button,
.bom-table .qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.bom-table .name-input {
    width: 100%;
    padding: 4px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.85rem;
    outline: none;
    background: var(--bg);
    color: var(--fg);
}

.bom-total-row td {
    padding: 12px 10px;
    background: var(--bg-hover);
    border-top: 2px solid var(--brand);
    font-size: 0.95rem;
    color: var(--fg);
}

/* Reference column: wrap */
.bom-table td.ref-cell {
    white-space: normal;
    word-break: break-word;
    max-width: 180px;
    font-size: 0.78rem;
    line-height: 1.3;
    color: var(--fg-muted);
}

/* Supplier tags */
.supplier-tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.supplier-lcsc { background: rgba(37,99,235,0.15); color: #60a5fa; }
.supplier-digikey { background: rgba(234,88,12,0.15); color: #fb923c; }
.supplier-manual { background: rgba(239,68,68,0.15); color: #f87171; }
.supplier-other { background: rgba(168,85,247,0.15); color: #c084fc; }

.supplier-link {
    text-decoration: none;
    cursor: pointer;
}

.supplier-link:hover .supplier-tag {
    filter: brightness(1.3);
    text-decoration: underline;
}

.sku-text {
    font-size: 0.7rem;
    color: var(--fg-dim);
    display: block;
    margin-top: 2px;
}

.stock-ok { color: var(--success); font-weight: 600; }
.stock-low { color: var(--danger); font-weight: 600; }

/* ── Action Buttons ── */
.action-section {
    text-align: center;
    padding: 20px 0;
    display: flex;
    gap: 14px;
    justify-content: center;
}

.btn-save, .btn-export {
    padding: 12px 40px;
    font-size: 1rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    color: white;
    font-weight: 600;
    transition: filter 0.2s;
}

.btn-save {
    background: var(--success);
}

.btn-export {
    background: var(--brand);
}

.btn-save:hover, .btn-export:hover { filter: brightness(1.15); }

/* ── Modal ── */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.modal.hidden { display: none !important; }

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    width: 700px;
    max-width: 90vw;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
}

.modal-header h2 {
    font-size: 1.1rem;
    color: var(--fg);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.6rem;
    color: var(--fg-dim);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover { color: var(--fg); }

.quotes-list {
    overflow-y: auto;
    padding: 14px 20px;
}

.quote-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.15s;
}

.quote-item:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.quote-item-info { flex: 1; }

.quote-item-info .quote-name {
    font-weight: 600;
    color: var(--brand);
}

.quote-item-info .quote-meta {
    font-size: 0.75rem;
    color: var(--fg-dim);
    margin-top: 2px;
}

.quote-item-actions {
    display: flex;
    gap: 6px;
}

.quote-item-actions button {
    padding: 4px 10px;
    border-radius: 4px;
    border: none;
    font-size: 0.75rem;
    cursor: pointer;
    color: white;
}

.btn-load { background: var(--brand); }
.btn-load:hover { filter: brightness(1.15); }
.btn-delete { background: var(--danger); opacity: 0.8; }
.btn-delete:hover { opacity: 1; }

.no-quotes {
    text-align: center;
    color: var(--fg-dim);
    padding: 40px 0;
}

/* ── Utility ── */
.hidden { display: none !important; }

footer {
    text-align: center;
    padding: 20px;
    color: var(--fg-dim);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 50%;
    border-top-color: var(--brand);
    animation: spin 0.8s ease-in-out infinite;
    vertical-align: middle;
    margin-right: 8px;
}

@keyframes spin { to { transform: rotate(360deg); } }