:root {
  --red: #c8102e;
  --red-d: #a50d26;
  --blue: #0070c0;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --bg: #f4f6f9;
  --card: #fff;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--blue); }
h1 { font-size: 22px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.r { text-align: right; }

/* ---------- top bar ---------- */
.topbar {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border-bottom: 3px solid var(--red);
  padding: 10px 20px; position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.brand small { color: var(--muted); font-weight: 500; }
.brand-mark {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, #1a7f37 0 48%, var(--red) 52%); color: #fff; font-size: 13px; letter-spacing: -.5px;
}
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a { padding: 8px 12px; border-radius: 6px; color: var(--ink); text-decoration: none; }
.nav a:hover { background: var(--bg); }
.nav a.active { background: #fde8eb; color: var(--red); font-weight: 600; }
.nav a.nav-cta { background: var(--red); color: #fff; }
.nav a.nav-cta:hover { background: var(--red-d); }
.nav-logout { color: var(--muted) !important; }
.nav-toggle { display: none; margin-left: auto; border: 1px solid var(--line); background: #fff; border-radius: 6px; font-size: 20px; padding: 2px 10px; cursor: pointer; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 22px 16px 60px; }
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }

/* ---------- cards & forms ---------- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.grid { display: grid; gap: 14px; margin-bottom: 14px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.g-item { grid-template-columns: 2fr 1fr 1fr auto; align-items: end; }
label { display: block; font-size: 13px; font-weight: 600; color: #374151; }
input, select, textarea {
  display: block; width: 100%; margin-top: 5px;
  font: inherit; font-size: 15px; color: var(--ink);
  border: 1px solid #d1d5db; border-radius: 7px; padding: 8px 10px; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(0, 112, 192, .25); border-color: var(--blue); }
textarea { resize: vertical; }
.chk { display: inline-flex; align-items: center; gap: 6px; font-weight: 500; cursor: pointer; }
.chk input { width: auto; margin: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid #d1d5db; background: #fff; color: var(--ink);
  border-radius: 7px; padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; white-space: nowrap;
}
.btn:hover { background: var(--bg); }
.btn-primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-d); }
.btn-danger { color: #b91c1c; }
.btn-danger:hover { background: #fef2f2; }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-block { width: 100%; }

.alert { padding: 11px 14px; border-radius: 8px; margin-bottom: 14px; border: 1px solid; }
.alert-ok { background: #ecfdf5; border-color: #a7f3d0; color: #065f46; }
.alert-err { background: #fef2f2; border-color: #fecaca; color: #991b1b; }
.alert-warn { background: #fffbeb; border-color: #fde68a; color: #92400e; }

/* ---------- dashboard ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; color: var(--muted); font-size: 13px; }
.stat span { display: block; font-size: 24px; font-weight: 700; color: var(--ink); }
.filters { display: flex; gap: 10px; align-items: center; padding: 12px; }
.filters input, .filters select { margin: 0; }
.filters input { flex: 1; }
.filters select { width: auto; }
.table-card { padding: 0; overflow: hidden; }
table.list { width: 100%; border-collapse: collapse; }
.list th, .list td { padding: 10px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.list th { background: #f9fafb; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
.list th.r, .list td.r { text-align: right; }
.list tr:last-child td { border-bottom: 0; }
.list td input { margin: 0; }
.list .w-sm { max-width: 140px; }
.actions { text-align: right; white-space: nowrap; }
.actions .inline { display: inline; }
.empty { padding: 30px; text-align: center; color: var(--muted); margin: 0; }
.tag { font-size: 12px; font-weight: 600; padding: 2px 8px; border-radius: 99px; background: #eef2ff; color: #3730a3; }
.tag-quotation { background: #e0f2fe; color: #075985; }
.tag-bill, .tag-invoice { background: #fde8eb; color: var(--red-d); }

/* ---------- bill editor ---------- */
.sec-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.sec-head h2 { margin: 0; }
.col-toggles { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.qty-label { width: 110px; margin: 0; padding: 4px 8px; font-size: 13px; }

.irow {
  display: grid; align-items: start; gap: 8px;
  grid-template-columns: 30px minmax(180px, 1fr) 120px 80px 100px 100px 110px 92px;
  padding: 6px 0; border-bottom: 1px dashed var(--line);
}
.irow input, .irow textarea { margin: 0; padding: 7px 8px; }
.irow textarea { min-height: 37px; overflow: hidden; resize: none; }
.ihead { font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line); }
.c-no { text-align: center; font-weight: 700; padding-top: 8px; color: var(--muted); }
.ihead .c-no { padding-top: 0; }
.c-ctl { display: flex; gap: 4px; }
.ib { border: 1px solid var(--line); background: #fff; border-radius: 6px; width: 28px; height: 35px; cursor: pointer; font-size: 14px; }
.ib:hover { background: var(--bg); }
.ib-del { color: #b91c1c; }
.irow .m { display: none; }
.items-foot { display: flex; align-items: center; gap: 16px; margin-top: 12px; flex-wrap: wrap; }
.total-box { margin-left: auto; font-size: 17px; }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; position: sticky; bottom: 0; background: var(--bg); padding: 12px 0; }

/* hidden columns */
.hide-size .col-size, .hide-qty .col-qty, .hide-qty .col-qty-inline, .hide-amount .col-amount { display: none !important; }
.hide-size .irow { grid-template-columns: 30px minmax(180px, 1fr) 80px 100px 100px 110px 92px; }
.hide-qty .irow { grid-template-columns: 30px minmax(180px, 1fr) 120px 100px 100px 110px 92px; }
.hide-amount .irow { grid-template-columns: 30px minmax(180px, 1fr) 120px 80px 100px 100px 92px; }
.hide-size.hide-qty .irow { grid-template-columns: 30px minmax(180px, 1fr) 100px 100px 110px 92px; }
.hide-size.hide-amount .irow { grid-template-columns: 30px minmax(180px, 1fr) 80px 100px 100px 92px; }
.hide-qty.hide-amount .irow { grid-template-columns: 30px minmax(180px, 1fr) 120px 100px 100px 92px; }
.hide-size.hide-qty.hide-amount .irow { grid-template-columns: 30px minmax(180px, 1fr) 120px 120px 92px; }

.mono { font-family: inherit; }

/* ---------- settings ---------- */
.img-field span { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.img-field img { display: block; max-width: 100%; max-height: 110px; border: 1px dashed #d1d5db; border-radius: 8px; padding: 6px; background: #fff; margin-bottom: 6px; }
.img-field img.sig { max-height: 70px; }

/* ---------- login ---------- */
.login-page { display: grid; place-items: center; min-height: 100vh; padding: 16px; background: linear-gradient(160deg, #fff 0%, #fde8eb 100%); }
.login-card { width: 100%; max-width: 380px; background: #fff; border-radius: 14px; padding: 28px; box-shadow: 0 10px 40px rgba(0, 0, 0, .1); }
.login-card h1 { text-align: center; font-size: 18px; margin: 6px 0 18px; color: var(--muted); }
.login-card label { margin-bottom: 14px; }
.login-logo { display: block; width: 100%; }

/* ---------- mobile ---------- */
@media (max-width: 900px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; background: #fff; padding: 8px; border-bottom: 1px solid var(--line); box-shadow: 0 8px 20px rgba(0,0,0,.08); }
  .nav-open .nav { display: flex; }
  .topbar { padding: 10px 16px; }
  .brand small { display: none; }
  .g2, .g4, .g-item { grid-template-columns: 1fr; }
  .filters { flex-wrap: wrap; }
  .filters input { flex-basis: 100%; }

  /* item rows become cards */
  .ihead { display: none; }
  .irow, .hide-size .irow, .hide-qty .irow, .hide-amount .irow,
  .hide-size.hide-qty .irow, .hide-size.hide-amount .irow, .hide-qty.hide-amount .irow, .hide-size.hide-qty.hide-amount .irow {
    grid-template-columns: 1fr 1fr; position: relative;
    border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin-bottom: 10px;
  }
  .irow .m { display: block; font-size: 12px; color: var(--muted); margin-bottom: 3px; }
  .c-no { position: absolute; top: 8px; left: 10px; padding: 0; }
  .c-part, .c-size { grid-column: 1 / -1; }
  .c-part { padding-left: 22px; }
  .c-ctl { grid-column: 1 / -1; justify-content: flex-end; }
  .total-box { margin-left: 0; width: 100%; }

  /* list table becomes cards */
  table.list thead { display: none; }
  table.list, .list tbody, .list tr, .list td { display: block; width: 100%; }
  .list tr { border-bottom: 1px solid var(--line); padding: 10px 14px; }
  .list td { border: 0; padding: 3px 0; text-align: left !important; }
  .list td[data-l]::before { content: attr(data-l) ": "; color: var(--muted); font-size: 12px; }
  .list .actions { padding-top: 8px; white-space: normal; display: flex; flex-wrap: wrap; gap: 6px; }
  .list .w-sm { max-width: none; }
}