/* ============ IPC Spec Builder — styles (dark, matches reference) ============ */
:root {
  --bg: #0b1120;
  --bg-2: #080d19;
  --bg-3: #050810;
  --surface: #0f172a;
  --surface-2: #0b1120;
  --surface-head: #131d35;
  --border: #1e293b;
  --border-soft: #24324a;
  --text: #e2e8f0;
  --text-2: #cbd5e1;
  --text-dim: #94a3b8;
  --text-faint: #64748b;
  --primary: #2563eb;
  --primary-hi: #3b82f6;
  --primary-ink: #60a5fa;
  --primary-soft: #172554;
  --emerald: #34d399;
  --emerald-deep: #059669;
  --rose: #e11d48;
  --rose-ink: #fb7185;
  --amber: #fbbf24;
  --indigo: #818cf8;
  --radius: 12px;
  --radius-sm: 8px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  color-scheme: dark;
  font-synthesis: none;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Sarabun", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary-ink); text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; }
.mono { font-family: var(--mono); }
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.hide { display: none !important; }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.center { text-align: center; }
.grow { flex: 1; }
.spacer { flex: 1; }
.stack > * + * { margin-top: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.tight { gap: 6px; }
.between { justify-content: space-between; }

.app-loading { display: grid; place-items: center; min-height: 100vh; color: var(--text-dim); }

::-webkit-scrollbar { width: 7px; height: 7px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #24324a; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #334155; }
.no-scrollbar::-webkit-scrollbar { display: none; }

/* ---------- app shell ---------- */
.app { display: flex; min-height: 100vh; }
.main {
  flex: 1; min-width: 0; padding: 18px;
  max-width: 1400px; width: 100%; margin: 0 auto;
}
@media (min-width: 768px) { .main { padding: 30px; } }

/* ---------- sidebar (desktop) ---------- */
.sidebar {
  width: 250px; flex-shrink: 0; background: var(--bg-2);
  border-right: 1px solid var(--border); display: flex; flex-direction: column;
  position: sticky; top: 0; height: 100vh; z-index: 50;
}
.sidebar-brand {
  padding: 18px 16px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.sidebar-brand .logo {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  background: rgba(37, 99, 235, .18); border: 1px solid rgba(59, 130, 246, .4);
  display: grid; place-items: center; font-size: 1.05rem;
}
.sidebar-brand .name { font-weight: 700; font-size: .82rem; color: #fff; letter-spacing: .01em; }
.sidebar-brand .sub { font-size: .62rem; color: var(--text-dim); font-weight: 600; }

.nav { padding: 12px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.nav-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 10px 14px; border-radius: 10px; font-weight: 500; font-size: .9rem;
  color: var(--text-dim); cursor: pointer; border: 1px solid transparent; width: 100%;
  background: none; text-align: left; font-family: inherit;
}
.nav-item:hover { background: rgba(30, 41, 59, .6); color: var(--text-2); }
.nav-item.active {
  background: rgba(37, 99, 235, .18); color: var(--primary-ink);
  border-color: rgba(59, 130, 246, .3); font-weight: 600;
}
.nav-item .ic { font-size: 1rem; }
.nav-item .lbl { display: flex; align-items: center; gap: 10px; }

.user-panel {
  margin: 12px; padding: 12px; border-radius: 12px;
  background: rgba(15, 23, 42, .7); border: 1px solid var(--border);
}
.db-status {
  padding: 10px 16px; border-top: 1px solid var(--border); background: var(--bg-3);
  font-size: .7rem; color: var(--text-faint); display: flex; justify-content: space-between;
}

/* ---------- mobile topbar + drawer ---------- */
.topbar {
  display: none; align-items: center; justify-content: space-between;
  padding: 12px 14px; background: var(--bg-2); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 40;
}
.topbar .brand { display: flex; align-items: center; gap: 8px; font-weight: 700; color: #fff; min-width: 0; }
.topbar .brand .name { font-size: .82rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 44vw; }
.drawer-backdrop { position: fixed; inset: 0; background: rgba(0, 0, 0, .7); z-index: 45; }

@media (max-width: 767px) {
  .app { flex-direction: column; }
  .topbar { display: flex; }
  .sidebar {
    position: fixed; inset: 0 auto 0 0; height: 100vh; transform: translateX(-100%);
    transition: transform .25s ease;
  }
  .sidebar.open { transform: translateX(0); }
}

/* ---------- view header ---------- */
.view { display: flex; flex-direction: column; gap: 20px; }
.view-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.view-title { font-size: 1.5rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; }
.view-title .ic { font-size: 1.2rem; }

/* ---------- cards / panels ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
.card-pad { padding: 16px; }
.card-head {
  padding: 12px 18px; background: var(--surface-head); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  font-weight: 700; font-size: .86rem;
}

/* ---------- buttons ---------- */
.btn {
  appearance: none; font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border-soft); background: var(--surface);
  color: var(--text-2); border-radius: 10px; padding: 9px 14px;
  display: inline-flex; align-items: center; gap: 7px; line-height: 1; white-space: nowrap;
}
.btn:hover { background: #1e293b; color: #fff; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; box-shadow: 0 8px 20px -8px rgba(37, 99, 235, .6); }
.btn.primary:hover { background: var(--primary-hi); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--text-dim); }
.btn.ghost:hover { background: #1e293b; color: #fff; }
.btn.danger { color: var(--rose-ink); border-color: rgba(225, 29, 72, .4); }
.btn.danger:hover { background: rgba(225, 29, 72, .15); color: #fff; }
.btn.sm { padding: 6px 10px; font-size: .78rem; border-radius: 8px; }
.btn.block { width: 100%; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.icon-btn {
  appearance: none; border: 1px solid var(--border-soft); background: var(--surface);
  color: var(--text-dim); border-radius: 8px; padding: 6px; cursor: pointer;
  display: inline-grid; place-items: center; font-size: .9rem;
}
.icon-btn:hover { background: #1e293b; color: #fff; }
.icon-btn.danger:hover { background: rgba(225, 29, 72, .15); color: var(--rose-ink); border-color: rgba(225, 29, 72, .4); }

/* ---------- inputs ---------- */
label.field { display: block; font-size: .76rem; font-weight: 600; color: var(--text-2); margin-bottom: 5px; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--text);
  background: var(--surface-2); border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm); padding: 9px 11px;
}
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary-hi); }
input[type="number"] { font-family: var(--mono); }
input::placeholder, textarea::placeholder { color: var(--text-faint); }
select { cursor: pointer; }
.formgrid { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 560px) {
  .formgrid.c2 { grid-template-columns: 1fr 1fr; }
  .formgrid.c3 { grid-template-columns: 1fr 1fr 1fr; }
}
input[type="range"] { -webkit-appearance: none; appearance: none; height: 6px; padding: 0; background: #1e293b; border: none; border-radius: 999px; cursor: pointer; accent-color: var(--primary); }
input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--primary); cursor: pointer; }

/* ---------- badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px;
  border-radius: 6px; font-size: .68rem; font-weight: 700; letter-spacing: .02em;
  background: rgba(30, 41, 59, .8); color: var(--text-dim); border: 1px solid var(--border-soft);
}
.badge.pill { border-radius: 999px; }
.badge.cat { background: rgba(23, 37, 84, .6); color: var(--primary-ink); border-color: rgba(30, 58, 138, .6); }
.badge.count { background: rgba(30, 41, 59, .8); color: var(--text-2); font-family: var(--mono); }
.badge.eol {
  background: var(--rose); color: #fff; border-color: #fb7185;
  font-weight: 900; letter-spacing: .08em;
}
.badge.eol .dot { width: 5px; height: 5px; border-radius: 999px; background: #fff; }
.badge.margin { background: rgba(6, 78, 59, .6); color: var(--emerald); border-color: rgba(6, 95, 70, .6); font-family: var(--mono); }
.badge.lock { background: rgba(30, 41, 59, 1); color: var(--text-dim); border-color: var(--border-soft); }
.badge.public { background: rgba(49, 46, 129, .5); color: #a5b4fc; border-color: rgba(67, 56, 202, .6); }
.badge.good { background: rgba(6, 78, 59, .6); color: var(--emerald); border-color: transparent; }
.badge.warn { background: rgba(120, 53, 15, .4); color: var(--amber); border-color: rgba(146, 64, 14, .5); }
.badge.danger { background: rgba(136, 19, 55, .4); color: var(--rose-ink); border-color: rgba(159, 18, 57, .5); }

.delta.up { color: var(--rose-ink); }
.delta.down { color: var(--emerald); }
.delta.flat { color: var(--text-faint); }

/* ---------- tables ---------- */
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.tbl { width: 100%; border-collapse: collapse; font-size: .82rem; white-space: nowrap; }
table.tbl thead th {
  padding: 11px 14px; text-align: left; font-size: .68rem; text-transform: uppercase;
  letter-spacing: .04em; color: var(--text-dim); font-weight: 700;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
table.tbl tbody td { padding: 12px 14px; border-bottom: 1px solid rgba(30, 41, 59, .5); vertical-align: top; }
table.tbl tbody tr:last-child td { border-bottom: none; }
table.tbl tbody tr:hover { background: rgba(19, 29, 53, .4); }
table.tbl .num { text-align: right; font-family: var(--mono); }
table.tbl tr.eol-row { background: rgba(76, 5, 25, .18); box-shadow: inset 2px 0 0 var(--rose); }
table.tbl tr.eol-row:hover { background: rgba(76, 5, 25, .28); }

/* ---------- category chips ---------- */
.chips { display: flex; gap: 6px; align-items: center; overflow-x: auto; padding: 6px 0; }
.chip {
  appearance: none; font: inherit; cursor: pointer; white-space: nowrap;
  font-size: .74rem; font-weight: 600; padding: 6px 10px; border-radius: 9px;
  background: rgba(30, 41, 59, .7); color: var(--text-2);
  border: 1px solid rgba(51, 65, 85, .5); display: inline-flex; align-items: center; gap: 6px;
}
.chip:hover { background: #334155; color: #fff; }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary-hi); }
.chip .n { font-size: .62rem; font-family: var(--mono); font-weight: 700; padding: 1px 6px; border-radius: 999px; background: rgba(15, 23, 42, .6); }
.chip.active .n { background: rgba(30, 58, 138, .8); color: #dbeafe; }
.chip.eol { background: rgba(76, 5, 25, .3); color: var(--rose-ink); border-color: rgba(159, 18, 57, .4); }
.chip.eol.active { background: var(--rose); color: #fff; }

/* ---------- builder slot ---------- */
.slot {
  padding: 12px; border-radius: 10px; border: 1px solid rgba(30, 41, 59, .9);
  background: var(--surface-2); display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
}
.slot.eol { background: rgba(76, 5, 25, .2); border-color: rgba(159, 18, 57, .5); }
.slot .slot-cat { width: 120px; flex-shrink: 0; font-size: .72rem; font-weight: 700; color: var(--primary-ink); text-transform: uppercase; letter-spacing: .05em; }
.slot .slot-main { flex: 1; min-width: 180px; }
.slot .slot-tail { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.qty-stepper { display: flex; align-items: center; gap: 3px; }
.qty-stepper button { width: 26px; height: 26px; border-radius: 6px; border: 1px solid var(--border-soft); background: var(--surface); color: var(--text-2); font-weight: 700; cursor: pointer; }
.qty-stepper button:hover { color: #fff; background: #1e293b; }
.qty-stepper input { width: 46px; text-align: center; padding: 5px 2px; }
.slot .subtotal { width: 96px; text-align: right; font-family: var(--mono); }
.slot .subtotal b { display: block; color: #fff; font-size: .9rem; }
.slot .subtotal span { font-size: .66rem; color: var(--text-faint); }

/* ---------- summary panel ---------- */
.summary { position: sticky; top: 24px; }
.summary .line { display: flex; justify-content: space-between; align-items: center; font-size: .82rem; color: var(--text-2); }
.summary .line .v { font-family: var(--mono); font-weight: 700; color: #fff; }
.formula {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px; font-family: var(--mono); font-size: .72rem;
}
.final-price { font-family: var(--mono); font-weight: 800; font-size: 1.7rem; color: var(--primary-ink); letter-spacing: -.02em; }

/* ---------- KPI ---------- */
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px; }
.kpi .k { font-size: .66rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); }
.kpi .v { font-size: 1.15rem; font-weight: 800; font-family: var(--mono); margin-top: 2px; }

/* ---------- modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .78); z-index: 60;
  display: flex; align-items: flex-start; justify-content: center; padding: 20px;
  overflow-y: auto;
}
.modal {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  width: 100%; max-width: 480px; margin: 32px 0; box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .8);
}
.modal.lg { max-width: 620px; }
.modal.xl { max-width: 860px; }
.modal-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 16px 18px; border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 1rem; font-weight: 700; color: #fff; }
.modal-body { padding: 18px; }
.modal-body.stack > * + * { margin-top: 14px; }

/* printable quotation doc */
.doc {
  background: #fff; color: #0f172a; border-radius: 10px; padding: 28px;
  font-size: .8rem;
}
.doc h1 { font-size: 1.3rem; font-weight: 800; color: #0f172a; }
.doc table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.doc thead th { border-bottom: 2px solid #cbd5e1; padding: 8px 6px; text-align: left; text-transform: uppercase; font-size: .68rem; color: #475569; }
.doc tbody td { border-bottom: 1px solid #e2e8f0; padding: 8px 6px; }
.doc .num { text-align: right; font-family: var(--mono); }
.doc .muted { color: #64748b; }
.doc .box { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 8px; padding: 12px; }

/* segmented toggle */
.seg { display: inline-flex; background: var(--bg-2); border: 1px solid var(--border-soft); border-radius: 9px; padding: 3px; gap: 3px; }
.seg button { appearance: none; border: none; background: none; font: inherit; font-weight: 600; font-size: .76rem; color: var(--text-dim); padding: 5px 10px; border-radius: 6px; cursor: pointer; }
.seg button.active { background: var(--primary); color: #fff; }

/* ---------- DatePicker ---------- */
.dp { position: relative; display: inline-block; }
.dp-trigger {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--surface-2); border: 1px solid var(--border-soft); border-radius: 9px;
  color: #fff; padding: 9px 11px; cursor: pointer; font: inherit; min-width: 190px;
}
.dp-trigger.sm { padding: 6px 9px; font-size: .78rem; min-width: 0; }
.dp-trigger:hover, .dp-trigger.open { border-color: var(--primary-hi); }
.dp-trigger .val { font-family: var(--mono); display: flex; align-items: center; gap: 7px; }
.dp-trigger .tag { font-size: .62rem; padding: 2px 6px; border-radius: 5px; background: rgba(23, 37, 84, .7); border: 1px solid rgba(30, 58, 138, .6); color: #93c5fd; }
.dp-pop {
  position: absolute; z-index: 70; margin-top: 6px; width: 280px;
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: 12px;
  padding: 14px; box-shadow: 0 24px 60px -12px rgba(0, 0, 0, .7);
}
.dp-pop.right { right: 0; }
.dp-nav { display: flex; align-items: center; justify-content: space-between; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.dp-nav button.arrow { width: 28px; height: 28px; border-radius: 8px; border: none; background: none; color: var(--text-dim); cursor: pointer; font-size: 1rem; }
.dp-nav button.arrow:hover { background: #1e293b; color: #fff; }
.dp-nav select { width: auto; padding: 4px 6px; font-size: .76rem; }
.dp-week, .dp-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; text-align: center; }
.dp-week { margin: 10px 0 4px; font-size: .66rem; font-weight: 700; color: var(--text-dim); }
.dp-week .sun { color: var(--rose-ink); }
.dp-week .sat { color: var(--amber); }
.dp-grid button {
  padding: 6px 0; border-radius: 8px; border: none; background: none; color: var(--text-2);
  font-family: var(--mono); font-size: .78rem; cursor: pointer;
}
.dp-grid button:hover { background: #1e293b; color: #fff; }
.dp-grid button.other { color: var(--text-faint); pointer-events: none; }
.dp-grid button.today { border: 1px solid rgba(30, 58, 138, .8); color: var(--primary-ink); }
.dp-grid button.sel { background: var(--primary); color: #fff; font-weight: 700; }
.dp-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 10px; margin-top: 8px; border-top: 1px solid var(--border); }
.dp-foot .btn { padding: 4px 8px; font-size: .72rem; }

/* ---------- toast ---------- */
.toast-wrap { position: fixed; top: 16px; right: 16px; z-index: 80; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--surface); border: 1px solid var(--border-soft); color: #fff;
  padding: 10px 16px; border-radius: 10px; font-size: .82rem; font-weight: 600;
  box-shadow: 0 16px 40px -12px rgba(0, 0, 0, .6); display: flex; align-items: center; gap: 8px;
  max-width: 82vw;
}
.toast .ic { color: var(--emerald); }
.toast.bad .ic { color: var(--rose-ink); }

/* ---------- empty state ---------- */
.empty { text-align: center; padding: 48px 20px; color: var(--text-dim); }
.empty .ic { font-size: 2rem; opacity: .5; }
.empty h3 { color: var(--text-2); margin: 10px 0 4px; }

/* ---------- notice banners ---------- */
.notice {
  padding: 12px 14px; border-radius: 10px; font-size: .8rem;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.notice.warn { background: rgba(120, 53, 15, .18); border: 1px solid rgba(180, 83, 9, .35); color: #fcd34d; }
.notice.info { background: rgba(23, 37, 84, .4); border: 1px solid rgba(30, 58, 138, .5); color: #93c5fd; }

/* ---------- access denied ---------- */
.gate { max-width: 560px; margin: 6vh auto; text-align: center; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.gate .lockbig { width: 64px; height: 64px; border-radius: 18px; background: rgba(251, 191, 36, .12); border: 1px solid rgba(251, 191, 36, .3); display: grid; place-items: center; font-size: 1.8rem; }

/* ---------- print ---------- */
@media print {
  .sidebar, .topbar, .drawer-backdrop, .no-print, .toast-wrap { display: none !important; }
  .app, .main { display: block; padding: 0; max-width: none; }
  body { background: #fff; }
  .modal-backdrop { position: static; background: none; padding: 0; overflow: visible; }
  .modal { border: none; box-shadow: none; max-width: none; margin: 0; }
  .modal-head, .modal .no-print { display: none !important; }
  .doc { padding: 0; }
}