:root {
  --bg: #f5f6f4;
  --surface: #ffffff;
  --line: #d8ddd6;
  --line-strong: #aeb9ae;
  --text: #1f2522;
  --muted: #657067;
  --green: #236451;
  --green-dark: #17483a;
  --amber: #ad6b24;
  --blue: #315d7c;
  --danger: #a1342f;
  --shadow: 0 8px 24px rgba(31, 37, 34, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14px;
  line-height: 1.4;
}

.shell {
  width: min(1440px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 36px;
}

.topbar,
.estimate-head,
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar {
  margin-bottom: 18px;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  font-weight: 700;
}

h2 {
  font-size: 16px;
  font-weight: 700;
}

.topbar p {
  margin-top: 4px;
  color: var(--muted);
}

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

button {
  min-height: 38px;
  border: 1px solid var(--green);
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  padding: 0 14px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--green-dark);
}

button.ghost {
  background: #ffffff;
  color: var(--green);
}

button.mini {
  min-height: 30px;
  padding: 0 10px;
  font-size: 12px;
}

button.danger {
  border-color: #d5b1ad;
  background: #fff8f7;
  color: var(--danger);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.meta-grid,
.workspace,
.estimate {
  display: grid;
  gap: 12px;
}

.meta-grid {
  grid-template-columns: 150px 160px minmax(220px, 1fr) minmax(260px, 1.3fr);
  margin-bottom: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.workspace {
  grid-template-columns: repeat(auto-fit, minmax(330px, 1fr));
  align-items: start;
}

.panel,
.estimate {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel {
  padding: 16px;
}

.estimate {
  margin-top: 12px;
  padding: 16px;
}

.smeta-form {
  margin-bottom: 14px;
  border-top: 1px solid #d6d6d6;
  border-left: 1px solid #d6d6d6;
  background: #ffffff;
  font-family: "Times New Roman", Times, serif;
  font-size: 16px;
}

.smeta-title,
.smeta-subtitle {
  min-height: 22px;
  border-right: 1px solid #d6d6d6;
  border-bottom: 1px solid #d6d6d6;
  text-align: center;
  font-weight: 700;
  line-height: 1.25;
}

.smeta-title {
  padding-top: 16px;
}

.smeta-subtitle {
  padding-bottom: 2px;
}

.smeta-row {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(280px, 0.95fr);
  min-height: 42px;
}

.smeta-label,
.smeta-value {
  border-right: 1px solid #d6d6d6;
  border-bottom: 1px solid #d6d6d6;
  padding: 4px 6px;
  white-space: pre-wrap;
}

.smeta-value {
  font-weight: 700;
}

.source-tag {
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

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

label,
fieldset {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #ffffff;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 9px 10px;
}

input:disabled {
  background: #f1f3f1;
  color: var(--muted);
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--blue);
  outline: 2px solid rgba(49, 93, 124, 0.18);
}

.checks {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.checks legend {
  padding: 0 4px;
}

.checks label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  font-weight: 400;
}

.checks input {
  width: auto;
}

.option-box {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  font-weight: 400;
}

.option-box[hidden] {
  display: none;
}

.option-box input {
  width: auto;
  margin-top: 3px;
}

.option-box small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.coefficients {
  display: grid;
  gap: 8px;
}

.coeff-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.coefficient-list {
  display: grid;
  gap: 8px;
}

.coefficient-row {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) 120px 36px;
  gap: 8px;
  align-items: center;
}

.coefficient-row input {
  min-width: 0;
}

.coefficient-row button {
  width: 36px;
  padding: 0;
}

.inline-input {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.preview {
  min-height: 82px;
  margin: 12px 0;
  padding: 12px;
  border-left: 4px solid var(--blue);
  background: #f7faf9;
  color: var(--text);
}

.preview strong {
  display: block;
  margin-bottom: 5px;
  font-size: 16px;
}

.preview small {
  display: block;
  color: var(--muted);
}

.preview.warn {
  border-left-color: var(--amber);
  background: #fffaf2;
}

.preview.error {
  border-left-color: var(--danger);
  background: #fff8f7;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 1080px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 9px 10px;
  vertical-align: top;
  text-align: left;
}

th {
  background: #eaf0ed;
  color: #26352f;
  font-size: 12px;
  text-transform: uppercase;
}

td:nth-child(1),
td:nth-child(6),
td:nth-child(7),
th:nth-child(1),
th:nth-child(6),
th:nth-child(7) {
  text-align: right;
  white-space: nowrap;
}

td:nth-child(8),
th:nth-child(8) {
  width: 52px;
  text-align: center;
}

tfoot td {
  border-bottom: 0;
  background: #f2f5f2;
  font-weight: 700;
}

.note {
  margin-top: 12px;
}

.muted {
  color: var(--muted);
}

@media (max-width: 1000px) {
  .workspace,
  .meta-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-actions {
    width: 100%;
  }

  .top-actions button {
    flex: 1;
  }

  .smeta-row {
    grid-template-columns: 1fr;
  }

  .coefficient-row {
    grid-template-columns: 1fr 110px 36px;
  }
}

@media print {
  body {
    background: #ffffff;
  }

  .shell {
    width: 100%;
    padding: 0;
  }

  .workspace,
  .topbar,
  .meta-grid,
  .top-actions,
  .estimate-head,
  .note {
    display: none;
  }

  .estimate {
    box-shadow: none;
    border: 0;
  }

  .estimate {
    padding: 0;
  }

  table {
    min-width: 0;
    font-size: 11px;
  }

  .smeta-form {
    margin-bottom: 12px;
    font-size: 12pt;
  }

  .smeta-row {
    grid-template-columns: 54% 46%;
  }
}