:root {
  --bg: #14110e;
  --bg-2: #1c1814;
  --panel: #221c16;
  --ink: #efe6d6;
  --muted: #9a8d7a;
  --line: #3a3128;
  --accent: #c47a3a;
  --accent-2: #e8b86d;
  --ok: #8faf6e;
  --bad: #c45c3a;
  --mono: "Cambria", "Iowan Old Style", "Times New Roman", serif;
  --sans: "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
}

h1, h2, h3 { font-family: var(--mono); font-weight: 600; margin: 0; }
h1 { font-size: 28px; letter-spacing: -0.02em; }
h2 { font-size: 18px; }
h3 { font-size: 15px; color: var(--accent-2); margin: 18px 0 8px; }

.kicker {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: var(--bg);
}
.login-card {
  width: min(420px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 36px 32px 28px;
}
.login-card .lead { color: var(--muted); margin: 10px 0 24px; }
.login-card label, .fields label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 12px;
}
input[type="text"], input[type="password"], input[type="number"] {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 10px 12px;
  font: 15px/1.2 var(--sans);
  width: 100%;
}
input:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
button {
  background: var(--accent);
  color: #1a120c;
  border: 0;
  padding: 11px 16px;
  font: 600 14px var(--sans);
  cursor: pointer;
  width: 100%;
}
button.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
button:disabled { opacity: 0.55; cursor: wait; }
.form-error { color: var(--bad); margin: 0 0 12px; }
.captcha-img {
  display: block;
  width: 200px;
  height: 70px;
  margin: 0 auto 14px;
  border: 1px solid var(--line);
  background: #f3f6fa;
}
.captcha-refresh {
  margin: 14px 0 0;
  text-align: center;
  font-size: 12px;
}
.captcha-refresh a { color: var(--muted); }
.hint { color: var(--muted); font-size: 12px; margin: 16px 0 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 20px 28px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}
.topbar-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}
.topbar-session {
  display: flex;
  gap: 14px;
  align-items: center;
}
.topbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}
.topbar-meta a { color: var(--accent-2); }
.topbar-meta button,
.topbar-meta a.ghost {
  width: auto;
  padding: 6px 12px;
  text-decoration: none;
  display: inline-block;
}

.layout {
  display: grid;
  grid-template-columns: minmax(320px, 400px) 1fr;
  min-height: calc(100vh - 88px);
}
.panel {
  border-right: 1px solid var(--line);
  background: var(--bg-2);
  padding: 18px 18px 28px;
}
.panel-head p { color: var(--muted); font-size: 13px; margin: 8px 0 16px; }
.inputs { max-height: calc(100vh - 88px); overflow: auto; }
.group { border-top: 1px solid var(--line); padding: 8px 0; }
.group summary { cursor: pointer; font-weight: 600; color: var(--accent-2); list-style: none; }
.group summary::-webkit-details-marker { display: none; }
.group-hint { color: var(--muted); font-size: 12px; margin: 6px 0 10px; }
.fields { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 10px; }
.fields label { margin: 0; }
.fields em { font-style: normal; color: var(--accent); font-size: 11px; }
.actions { display: grid; gap: 8px; margin-top: 16px; }
.report-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 8px;
}
.export-actions { display: flex; gap: 8px; flex-shrink: 0; }
.export-actions button {
  width: auto;
  min-width: 88px;
  padding: 8px 14px;
}

.results { padding: 22px 28px 48px; overflow: auto; }
.idle { color: var(--muted); max-width: 52ch; }
.kpi-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 8px 0 22px;
}
.kpi {
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 14px 14px 12px;
}
.kpi b { display: block; font-family: var(--mono); font-size: 26px; color: var(--accent-2); }
.kpi span { color: var(--muted); font-size: 12px; }
.kpi.drill-open { border-color: var(--accent); }
.kpi[data-drill] { cursor: pointer; }
.kpi[data-drill]:hover { border-color: var(--accent); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 22px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { border-bottom: 1px solid var(--line); padding: 6px 8px; text-align: right; }
th:first-child, td:first-child { text-align: left; }
th { color: var(--muted); font-weight: 500; }
.chart-box { height: 280px; background: var(--panel); border: 1px solid var(--line); padding: 18px 12px 8px; }
.note { color: var(--muted); font-size: 12px; margin-top: 6px; }
.status-ok { color: var(--ok); }
.status-bad { color: var(--bad); }
.hint-drill { color: var(--muted); font-size: 12px; margin: 0 0 10px; }
table.drill-table tr.drill-row { cursor: pointer; }
table.drill-table tr.drill-row:hover td { background: #2a241c; }
table.drill-table tr.drill-row.is-open td { background: #2e261c; }
table.drill-table tr.drill-detail td {
  text-align: left;
  background: #1c1814;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
table.drill-table tr.drill-detail ul { margin: 6px 0 0 18px; }
.kpi-detail {
  grid-column: 1 / -1;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 10px 14px;
  color: var(--muted);
  font-size: 13px;
}
.help-dialog {
  width: min(720px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  padding: 0;
}
.help-dialog::backdrop { background: rgba(10, 8, 6, 0.65); }
.help-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}
.help-head button { width: auto; }
.help-body { padding: 8px 20px 24px; overflow: auto; max-height: calc(100vh - 140px); }
.help-body h3 { margin-top: 18px; }
.help-body p, .help-body li { color: var(--ink); }
.help-body ul, .help-body ol { padding-left: 20px; }
.help-body li { margin: 6px 0; }

a.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 11px 16px;
  font: 600 14px var(--sans);
  text-align: center;
}
.reactant-table input, .reactant-table select {
  width: 100%;
}
.reactant-table .rm {
  width: auto;
  padding: 6px 8px;
  font-size: 12px;
}
.phase-checks { display: grid; gap: 8px; margin: 8px 0 12px; }
.phase-checks label {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
}
.phase-checks input { width: auto; }
.add-row { display: grid; grid-template-columns: 1fr 72px 72px auto; gap: 6px; margin-top: 8px; }
.add-row button { width: auto; padding: 8px 10px; }
.preset-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 12px; }
.preset-row button { width: auto; padding: 6px 10px; font-size: 12px; }
.cond-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.fs-badge { color: var(--muted); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }

.mode-tabs {
  display: flex;
  gap: 0;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
}
.mode-tab {
  width: auto;
  background: transparent;
  color: var(--muted);
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 12px 18px;
  font: 600 13px var(--sans);
  cursor: pointer;
}
.mode-tab:hover { color: var(--ink); }
.mode-tab.is-active {
  color: var(--accent-2);
  border-bottom-color: var(--accent);
  background: var(--panel);
}

@media (max-width: 980px) {
  .topbar {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 12px;
  }
  .topbar-meta { width: 100%; }
  .layout { grid-template-columns: 1fr; }
  .panel { border-right: 0; border-bottom: 1px solid var(--line); max-height: none; }
  .kpi-row, .grid-2, .fields, .cond-grid, .add-row { grid-template-columns: 1fr; }
}

/* Исходная химия: окна материалов и подбор % */
.chem-editor { margin-top: 8px; }
.chem-family { margin: 4px 0 16px; }
.chem-family-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0 6px;
}
.chem-fam { margin: 0; color: var(--accent-2); font-size: 13px; }
.chem-family-head .chem-add { width: auto; padding: 4px 10px; font-size: 12px; }
.chem-sum { color: var(--muted); font-size: 12px; }
.chem-cards { display: flex; flex-direction: column; gap: 8px; }
.chem-card { border: 1px solid var(--line); background: var(--panel); padding: 8px 10px; }
.chem-card.chem-extra { border-color: var(--accent); }
.chem-card-head { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.chem-card-head .chem-name {
  flex: 1 1 140px;
  min-width: 120px;
  width: auto;
  padding: 6px 8px;
  font-size: 13px;
  font-weight: 600;
}
.chem-share-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}
.chem-card-head input.chem-share { width: 84px; padding: 6px 8px; font-size: 13px; }
.chem-card-head .chem-toggle,
.chem-card-head .chem-del { width: auto; padding: 6px 10px; font-size: 12px; }
.chem-card-head .chem-del { color: var(--bad); }
.chem-fields {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 6px 8px;
  margin-top: 10px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}
.chem-field { display: flex; flex-direction: column; gap: 3px; color: var(--muted); font-size: 11px; }
.chem-field input { padding: 5px 6px; font-size: 12px; }
.solve-editor { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.target-row { display: grid; grid-template-columns: 1fr 88px 58px 30px; gap: 6px; align-items: center; margin-bottom: 6px; }
.target-row select,
.target-row input { padding: 6px; font-size: 13px; }
.target-row .t-del { width: 30px; padding: 4px; }
.vary-list { display: flex; flex-wrap: wrap; gap: 10px; }
.vary { display: flex; align-items: center; gap: 4px; font-size: 13px; color: var(--muted); }