:root {
  --ink: #172033;
  --muted: #667085;
  --line: #d9dee7;
  --soft: #f4f6f8;
  --bg: #eef1f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

header {
  background: var(--ink);
  color: #fff;
  padding: 18px 20px;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

header p {
  margin: 4px 0 0;
  color: #cbd2dd;
  font-size: 13px;
}

main {
  max-width: 1050px;
  margin: 20px auto;
  padding: 0 14px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
}

.panel,
.preview {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 4px 18px #1c2b4410;
}

h2 {
  font-size: 16px;
  margin: 0 0 14px;
}

h2.mt {
  margin-top: 18px;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.field {
  margin-bottom: 11px;
}

.field.mt {
  margin-top: 14px;
}

.wide {
  grid-column: 1 / -1;
}

label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 4px;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  font: inherit;
  padding: 10px 11px;
  border: 1px solid #cfd5df;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

textarea {
  min-height: 70px;
  resize: vertical;
}

.items {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
}

.items th,
.items td {
  border: 1px solid var(--line);
  padding: 6px;
  text-align: left;
}

.items th {
  font-size: 11px;
  background: var(--soft);
}

.items input {
  border: 0;
  padding: 7px 4px;
  border-radius: 4px;
}

.items .num {
  width: 78px;
}

.items .desc {
  min-width: 110px;
}

button {
  border: 0;
  border-radius: 9px;
  padding: 11px 14px;
  font-weight: 650;
  font-size: 14px;
  cursor: pointer;
}

.primary {
  background: var(--ink);
  color: #fff;
}

.secondary {
  background: var(--soft);
  color: var(--ink);
  border: 1px solid var(--line);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.paper {
  border: 1px solid var(--line);
  padding: 24px;
  min-height: 600px;
  background: #fff;
}

.paperhead {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 14px;
}

.paperhead h2 {
  font-size: 19px;
  margin: 0 0 4px;
}

.paperhead p {
  font-size: 12px;
  color: var(--muted);
  margin: 2px 0;
}

.doc-title {
  text-align: center;
  font-size: 17px;
  font-weight: 750;
  margin: 24px 0 18px;
}

.meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  background: var(--soft);
  padding: 10px;
  margin-bottom: 18px;
}

.section {
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.04em;
  margin: 14px 0 7px;
}

.client-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  font-size: 12px;
}

.client-grid div {
  border-bottom: 1px solid var(--line);
  padding: 5px 0;
}

.print-items {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  margin-top: 8px;
}

.print-items th,
.print-items td {
  padding: 8px 6px;
  border: 1px solid var(--line);
  text-align: left;
}

.print-items th {
  background: var(--ink);
  color: #fff;
}

.print-items .right {
  text-align: right;
  white-space: nowrap;
}

.total {
  margin: 16px 0 0 auto;
  max-width: 270px;
}

.total div {
  display: flex;
  justify-content: space-between;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.total .grand {
  font-size: 15px;
  font-weight: 800;
  border-bottom: 2px solid var(--ink);
}

.note {
  font-size: 11px;
  white-space: pre-wrap;
  margin-top: 18px;
}

.signatures {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  text-align: center;
  font-size: 11px;
}

.signatures div {
  width: 45%;
  border-top: 1px solid #9aa3b2;
  padding-top: 7px;
}

@media (max-width: 800px) {
  main {
    grid-template-columns: 1fr;
  }
  .panel {
    padding: 14px;
  }
  .preview {
    padding: 10px;
  }
  .paper {
    padding: 16px;
    min-height: 0;
  }
}

@media (max-width: 420px) {
  .grid,
  .client-grid {
    grid-template-columns: 1fr;
  }
  .wide {
    grid-column: auto;
  }
  .paper {
    padding: 12px;
  }
  .meta {
    flex-direction: column;
  }
  .items .num {
    width: 62px;
  }
}

@media print {
  body {
    background: #fff;
  }
  header,
  main > .panel {
    display: none !important;
  }
  main {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
  }
  .preview,
  .paper {
    border: 0;
    box-shadow: none;
    padding: 0;
    min-height: 0;
  }
}

.locked header,
.locked main {
  display: none;
}

.lock {
  display: none;
  max-width: 320px;
  margin: 18vh auto 0;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 4px 18px #1c2b4410;
}

.locked .lock {
  display: block;
}

.lock h1 {
  margin: 0 0 18px;
  font-size: 18px;
  text-align: center;
}

.lock button {
  width: 100%;
  margin-top: 12px;
}

.lock-error {
  margin: 8px 0 0;
  font-size: 12px;
  color: #c0392b;
}