:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #17212b;
  --muted: #637181;
  --line: #d8e0e8;
  --brand: #214e6f;
  --brand-strong: #143248;
  --accent: #c96b3c;
  --good: #1f7a4d;
  --warn: #b66a00;
  --bad: #b73737;
  --shadow: 0 10px 28px rgba(23, 33, 43, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  background: var(--brand-strong);
  color: #ffffff;
  padding: 16px 28px;
}

.is-disabled {
  display: none;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 230px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 800;
}

.brand strong,
.brand span {
  display: block;
}

.brand span {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.9rem;
}

.nav-tabs {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  overflow-x: auto;
}

.nav-button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
  cursor: pointer;
  padding: 10px 14px;
  white-space: nowrap;
}

.nav-button:hover,
.nav-button.active {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.main-content {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.45rem;
}

h3 {
  font-size: 1rem;
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(130px, 1fr));
  gap: 10px;
  width: min(560px, 100%);
}

.summary-strip div,
.finance-summary div,
.metric-list div,
.status-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 14px;
}

.summary-strip span,
.finance-summary span,
.metric-list span,
.status-box span,
.panel-title-row span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.summary-strip strong,
.finance-summary strong,
.metric-list strong,
.status-box strong {
  display: block;
  margin-top: 5px;
  font-size: 1.04rem;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.content-grid {
  display: grid;
  gap: 18px;
}

.two-columns {
  grid-template-columns: minmax(320px, 0.9fr) minmax(420px, 1.1fr);
}

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 18px;
  align-items: start;
}

.calculator-main {
  display: grid;
  gap: 18px;
}

.calculator-summary {
  position: sticky;
  top: 96px;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 18px;
}

.form-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-content: start;
}

.compact-form {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  padding: 9px 10px;
}

input:focus,
select:focus {
  border-color: var(--brand);
  outline: 3px solid rgba(33, 78, 111, 0.12);
}

.span-2 {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
}

.primary-button,
.secondary-button {
  min-height: 40px;
  border-radius: 8px;
  cursor: pointer;
  padding: 9px 14px;
  font-weight: 700;
}

.primary-button {
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #ffffff;
}

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

.icon-button {
  display: grid;
  width: 40px;
  min-height: 40px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  font-weight: 700;
}

.panel-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-title-row span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.82rem;
}

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

.cost-header,
.cost-row {
  display: grid;
  gap: 8px;
  align-items: center;
}

.variable-list .cost-header,
.variable-list .cost-row {
  grid-template-columns: minmax(180px, 1fr) 150px 140px 40px;
}

.fixed-list .cost-header,
.fixed-list .cost-row {
  grid-template-columns: minmax(220px, 1fr) 160px 40px;
}

.cost-header {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
}

.cost-row {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  padding: 8px;
}

.total-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef3f6;
  padding: 14px;
}

.total-card span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.total-card strong {
  display: block;
  margin-top: 5px;
  font-size: 1.04rem;
}

.table-wrap {
  max-width: 100%;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: middle;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.row-actions {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.small-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
  padding: 6px 9px;
}

.result-panel {
  display: grid;
  gap: 14px;
}

.status-box {
  border-left: 5px solid var(--brand);
}

.status-box.good {
  border-left-color: var(--good);
}

.status-box.warn {
  border-left-color: var(--warn);
}

.status-box.bad {
  border-left-color: var(--bad);
}

.metric-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

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

.dre-list div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

.dre-list span {
  color: var(--muted);
  font-size: 0.88rem;
}

.dre-list strong {
  white-space: nowrap;
}

.dre-list .dre-result {
  margin-top: 4px;
  border-top: 2px solid var(--brand);
  border-bottom: 0;
  padding-top: 12px;
}

.dre-list .dre-result span,
.dre-list .dre-result strong {
  color: var(--ink);
  font-weight: 800;
}

.summary-separator {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-align: center;
  text-transform: uppercase;
}

.summary-separator::before,
.summary-separator::after {
  content: "";
  flex: 1;
  border-top: 1px dashed var(--line);
}

.finance-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

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

@media (max-width: 1100px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .calculator-summary {
    position: static;
  }
}

@media (max-width: 980px) {
  .app-header {
    display: grid;
    padding: 16px 18px;
  }

  .nav-tabs {
    justify-content: flex-start;
  }

  .topbar,
  .section-header {
    display: grid;
  }

  .summary-strip,
  .two-columns,
  .finance-summary,
  .compact-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .main-content {
    padding: 18px;
  }

  .form-panel,
  .metric-list,
  .variable-list .cost-header,
  .variable-list .cost-row,
  .fixed-list .cost-header,
  .fixed-list .cost-row {
    grid-template-columns: 1fr;
  }

  .cost-header {
    display: none;
  }

  .span-2 {
    grid-column: auto;
  }
}