:root {
  --ink: #172d40;
  --muted: #586f80;
  --line: #dce5eb;
  --paper: #fff;
  --canvas: #f3f6f8;
  --nav: #142f44;
  --blue: #16679b;
  --blue-soft: #e9f3fa;
  --orange: #c16c20;
  --green: #27734c;
  --red: #b33438;
  --radius: 14px;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--canvas);
  font-size: 14px;
  line-height: 1.55;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
input,
select,
textarea {
  font: inherit;
}
button {
  cursor: pointer;
}
a {
  color: var(--blue);
}
button:focus-visible,
a:focus-visible {
  outline: 3px solid #7dc1e9;
  outline-offset: 3px;
}
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid #8cc4e4;
  outline-offset: 1px;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.shell {
  display: grid;
  grid-template-columns: 244px minmax(0, 1fr);
  min-height: 100vh;
}
.sidebar {
  background: var(--nav);
  color: #f4f8fa;
  padding: 30px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 0 10px 32px;
}
.brandmark {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: #f1a75b;
  color: var(--nav);
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: -1px;
  font-size: 20px;
}
.brand strong {
  font-size: 18px;
  letter-spacing: -0.4px;
  display: block;
}
.brand small {
  color: #adbfca;
  font-size: 11px;
  letter-spacing: 1.3px;
  text-transform: uppercase;
}
.nav-label {
  color: #9fb5c5;
  font-size: 11px;
  letter-spacing: 1.6px;
  padding: 5px 12px 12px;
}
.nav {
  display: grid;
  gap: 5px;
}
.nav a {
  color: #d5e3ec;
  text-decoration: none;
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: 9px;
  align-items: center;
  font-size: 13px;
}
.nav .number {
  font-size: 11px;
  opacity: 0.55;
  width: 20px;
}
.nav a:hover {
  background: #234358;
}
.nav a.active {
  background: #e9f3fa;
  color: #13364d;
  font-weight: 650;
}
.sidebar-bottom {
  margin-top: auto;
  padding: 24px 12px 0;
  border-top: 1px solid #375164;
  color: #b3c5d0;
  font-size: 12px;
}
.sidebar-bottom strong {
  color: #eef5f8;
  display: block;
  margin-bottom: 4px;
}
.main {
  min-width: 0;
}
.topbar {
  height: 76px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 0 34px;
}
.breadcrumb {
  font-size: 12px;
  color: var(--muted);
}
.breadcrumb strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
}
.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.save-status {
  font-size: 12px;
  color: var(--green);
  margin-right: 8px;
}
.save-status.failed {
  color: var(--red);
}
.content {
  padding: 32px 34px 55px;
  max-width: 1640px;
  margin: auto;
}
.page-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
}
.eyebrow {
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 700;
  margin-bottom: 5px;
}
h1 {
  font-size: 30px;
  line-height: 1.2;
  letter-spacing: -0.7px;
  margin: 0 0 9px;
}
h2 {
  font-size: 18px;
  letter-spacing: -0.25px;
  margin: 0 0 8px;
}
h3 {
  font-size: 14px;
  margin: 0 0 8px;
}
p {
  margin: 0 0 12px;
}
.subtle {
  color: var(--muted);
  font-size: 13px;
}
.tag {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--blue-soft);
  color: var(--blue);
  display: inline-block;
}
.tag.warn {
  background: #fff2e3;
  color: #875114;
}
.tag.good {
  background: #e7f3eb;
  color: var(--green);
}
.tag.error {
  background: #fbeaea;
  color: var(--red);
}
.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 23px;
  margin-bottom: 20px;
  box-shadow: 0 3px 14px #162d4203;
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 19px;
}
.card-head p {
  margin: 0;
}
.kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.kpi {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 21px;
}
.kpi-label {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 7px;
}
.kpi-value {
  font-size: 25px;
  font-weight: 650;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}
.kpi-value small {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
}
.kpi-note {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}
.btn {
  border: 1px solid #cddbe4;
  background: white;
  color: var(--ink);
  padding: 9px 13px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover {
  border-color: var(--blue);
  background: var(--blue-soft);
}
.btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: white;
}
.btn.primary:hover {
  background: #12537d;
}
.btn.danger {
  color: var(--red);
}
.btn.small {
  padding: 5px 9px;
  font-size: 11px;
}
.btn.flat {
  border: 0;
  background: transparent;
}
.button-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 15px;
}
.fields.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.fields.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.field {
  display: block;
  min-width: 0;
}
.field span.label {
  display: block;
  font-size: 12px;
  font-weight: 650;
  margin-bottom: 6px;
  color: #344f62;
}
.field input,
.field select,
.field textarea {
  display: block;
  width: 100%;
  min-height: 41px;
  border: 1px solid #cddbe4;
  border-radius: 7px;
  background: #fff;
  padding: 8px 11px;
  color: var(--ink);
}
.field textarea {
  resize: vertical;
}
.field small {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
}
.field.full {
  grid-column: 1/-1;
}
.field input.invalid {
  border-color: var(--red);
}
.divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 20px 0;
}
.workspace {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 20px;
}
.room-panel {
  padding: 16px;
  align-self: start;
}
.room-list {
  display: grid;
  gap: 6px;
  max-height: 690px;
  overflow: auto;
}
.room-btn {
  text-align: left;
  width: 100%;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  padding: 10px 12px;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.room-btn:hover {
  background: var(--canvas);
}
.room-btn.active {
  background: var(--blue-soft);
  border-color: #a9cce1;
}
.room-btn strong {
  font-size: 13px;
}
.room-btn small {
  display: block;
  font-size: 11px;
  color: var(--muted);
}
.room-btn .watts {
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--muted);
}
.group-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 12px 12px 3px;
}
.assignment {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 17px;
  margin-top: 15px;
}
.assignment-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 13px;
}
.results-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 9px;
  margin-top: 14px;
  background: var(--paper);
  border-radius: 7px;
  border: 1px solid var(--line);
  padding: 12px;
}
.results-strip span {
  font-size: 10px;
  color: var(--muted);
  display: block;
}
.results-strip strong {
  font-size: 17px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.results-strip em {
  font-size: 11px;
  font-style: normal;
  font-weight: 400;
}
.notice {
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 12px;
  border-left: 3px solid #79a7c5;
  background: #edf4f9;
  color: #34586e;
  margin: 12px 0;
}
.notice.warn {
  background: #fff5e8;
  border-color: #d79c50;
  color: #805019;
}
.notice.error {
  background: #fbeeee;
  border-color: #c65b5e;
  color: #9e3639;
}
.notice.good {
  background: #edf7f0;
  border-color: #55a675;
  color: #306748;
}
.notice ul {
  padding-left: 18px;
  margin: 4px 0;
}
.empty {
  padding: 24px;
  text-align: center;
  border: 1px dashed #c1d3df;
  border-radius: 10px;
  color: var(--muted);
  font-size: 13px;
  background: #fbfcfd;
}
.table-wrap {
  overflow-x: auto;
}
table {
  border-collapse: collapse;
  width: 100%;
  font-size: 12px;
}
th {
  background: #f3f7fa;
  color: #526c7e;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 650;
  padding: 11px 10px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
td {
  padding: 11px 10px;
  border-bottom: 1px solid #e8eef2;
  vertical-align: top;
}
td.num,
th.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
td .subtle {
  font-size: 10px;
}
tbody tr:hover {
  background: #fafcfe;
}
.two-column {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 20px;
}
.metric-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.metric-main .result {
  background: #f0f6fa;
  border-radius: 10px;
  padding: 18px;
}
.result label {
  color: var(--muted);
  font-size: 11px;
}
.result strong {
  display: block;
  font-size: 27px;
  letter-spacing: -0.4px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.result small {
  font-size: 12px;
  color: var(--muted);
}
.data-editor {
  position: relative;
}
.db-search {
  max-width: 350px;
}
.check-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 17px;
}
.check-label input {
  width: 17px;
  height: 17px;
}
.trace-step {
  margin: 0 0 17px;
  break-inside: avoid;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 18px 20px;
  background: #fff;
}
.step-top {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}
.step-num {
  display: grid;
  place-items: center;
  width: 27px;
  height: 27px;
  border-radius: 7px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}
.step-top h2 {
  margin: 0;
  font-size: 16px;
}
.equation {
  font-family: Cambria, "Times New Roman", serif;
  font-size: 19px;
  padding: 12px 15px;
  background: #f7f9fb;
  border-radius: 7px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}
.substitution {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: #34566b;
  margin-top: 10px;
  overflow-wrap: anywhere;
}
.definition-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 15px;
  font-size: 12px;
}
.definition-grid dt {
  color: var(--muted);
}
.definition-grid dd {
  margin: 0;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.prose {
  max-width: 960px;
}
.prose p,
.prose li {
  font-size: 13px;
}
.prose li {
  margin-bottom: 7px;
}
.prose ul,
.prose ol {
  padding-left: 22px;
}
.source-entry {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.source-entry p {
  margin: 5px 0;
}
.storage-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.storage-actions .card {
  margin: 0;
}
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  background: var(--nav);
  color: #fff;
  border-radius: 10px;
  padding: 13px 22px;
  box-shadow: 0 8px 30px #0003;
  max-width: 90%;
  font-size: 13px;
}
.toast.error {
  background: #9f3337;
}
.modal {
  border: 0;
  border-radius: 16px;
  padding: 28px;
  max-width: 520px;
  width: calc(100% - 40px);
  box-shadow: 0 20px 70px #0003;
  color: var(--ink);
}
.modal::backdrop {
  background: #142f4466;
  backdrop-filter: blur(2px);
}
.modal p {
  font-size: 13px;
  margin: 12px 0 20px;
}
.modal .button-row {
  justify-content: flex-end;
}
.footer {
  font-size: 11px;
  color: var(--muted);
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.tab-controls {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}
.file-input {
  display: none;
}
details summary {
  cursor: pointer;
  font-size: 12px;
  color: var(--muted);
  padding-top: 7px;
}
details .notice {
  margin-bottom: 0;
}
.page {
  display: none;
}
.page.active {
  display: block;
}
.print-only {
  display: none;
}
.chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.loading {
  padding: 60px;
  color: var(--muted);
}
@media (max-width: 1180px) {
  .shell {
    grid-template-columns: 210px minmax(0, 1fr);
  }
  .sidebar {
    padding: 25px 12px;
  }
  .content {
    padding: 25px;
  }
  .topbar {
    padding: 0 25px;
  }
  .workspace {
    grid-template-columns: 220px minmax(0, 1fr);
  }
  .fields.four {
    grid-template-columns: repeat(2, 1fr);
  }
  .two-column {
    grid-template-columns: 1fr;
  }
  .results-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 860px) {
  .shell {
    display: block;
  }
  .sidebar {
    height: auto;
    position: relative;
    padding: 16px;
  }
  .brand {
    padding: 0 0 16px;
  }
  .nav-label,
  .sidebar-bottom {
    display: none;
  }
  .nav {
    display: flex;
    overflow: auto;
    gap: 4px;
  }
  .nav a {
    white-space: nowrap;
    padding: 9px 11px;
  }
  .nav .number {
    display: none;
  }
  .topbar {
    height: auto;
    min-height: 70px;
    padding: 12px 20px;
  }
  .content {
    padding: 22px 20px;
  }
  .workspace {
    grid-template-columns: 1fr;
  }
  .room-panel {
    padding: 14px;
  }
  .room-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    max-height: 230px;
  }
  .group-label {
    grid-column: 1/-1;
    padding-top: 7px;
  }
  .kpis {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-heading h1 {
    font-size: 26px;
  }
  .definition-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 540px) {
  .content {
    padding: 19px 13px;
  }
  .topbar {
    padding: 12px 13px;
    align-items: flex-start;
  }
  .breadcrumb {
    display: none;
  }
  .top-actions {
    gap: 6px;
  }
  .save-status {
    width: 100%;
  }
  .page-heading {
    display: block;
  }
  .page-heading .button-row {
    margin-top: 13px;
  }
  .card {
    padding: 17px;
  }
  .fields,
  .fields.four,
  .fields.two {
    grid-template-columns: 1fr;
  }
  .kpis {
    gap: 8px;
  }
  .kpi {
    padding: 14px;
  }
  .kpi-value {
    font-size: 23px;
  }
  .room-list {
    grid-template-columns: repeat(2, 1fr);
  }
  .room-btn {
    padding: 8px;
  }
  .metric-main,
  .storage-actions {
    grid-template-columns: 1fr;
  }
  .definition-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer {
    display: block;
  }
  .equation {
    font-size: 16px;
  }
}
@media print {
  @page {
    size: A4 landscape;
    margin: 13mm;
  }
  body {
    background: white;
    font-size: 11px;
  }
  .shell {
    display: block;
  }
  .sidebar,
  .topbar,
  .no-print,
  .footer,
  .toast,
  .modal {
    display: none !important;
  }
  .content {
    padding: 0;
    max-width: none;
  }
  .page {
    display: none !important;
  }
  .page.active {
    display: block !important;
  }
  .card {
    box-shadow: none;
    margin-bottom: 12px;
    border-color: #aaa;
    padding: 12px;
    break-inside: avoid;
  }
  .room-panel,
  .room-editor,
  .project-settings {
    display: none;
  }
  .workspace {
    display: none;
  }
  .kpis {
    gap: 9px;
    margin-bottom: 12px;
  }
  .kpi {
    padding: 9px;
    border-color: #aaa;
  }
  .kpi-value {
    font-size: 19px;
  }
  .page-heading {
    margin-bottom: 14px;
  }
  h1 {
    font-size: 22px;
  }
  .table-wrap {
    overflow: visible;
  }
  table {
    font-size: 9px;
  }
  th {
    font-size: 8px;
    padding: 6px 4px;
  }
  td {
    padding: 6px 4px;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  .print-only {
    display: block;
  }
  .trace-step {
    break-inside: avoid;
    padding: 12px;
  }
  .two-column {
    display: block;
  }
  .notice {
    font-size: 10px;
  }
  .page[data-page="trace"] {
    max-width: 850px;
  }
  .page[data-page="trace"] .trace-step {
    margin-bottom: 10px;
  }
  .equation {
    font-size: 17px;
  }
  .source-entry {
    break-inside: avoid;
  }
}