:root {
  --paper: #f7f4ef;
  --surface: #ffffff;
  --ink: #1d2526;
  --muted: #687475;
  --line: #d9d2c8;
  --green: #1f6f5b;
  --green-dark: #174f42;
  --blue: #315a7c;
  --red: #9f3b36;
  --amber: #8b6423;
  --shadow: 0 18px 45px rgba(32, 34, 30, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(180deg, rgba(49, 90, 124, 0.10), transparent 320px),
    var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

.topbar,
main {
  width: min(1320px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0 22px;
}

.topbar h1,
.section-title h2 {
  margin: 0;
  letter-spacing: 0;
}

.topbar h1 {
  max-width: 880px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.08;
  font-weight: 740;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.topbar__note,
.summary-item,
.locked-row {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.topbar__note {
  min-width: 170px;
  padding: 14px 16px;
  border-radius: 8px;
}

.topbar__note span,
.summary-item span,
.locked-row span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.topbar__note strong,
.summary-item strong,
.locked-row strong {
  display: block;
  margin-top: 4px;
  font-size: 22px;
  line-height: 1.2;
}

.topbar__link {
  display: inline-block;
  margin-top: 10px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.topbar__link:hover {
  text-decoration: underline;
}

main {
  padding-bottom: 130px;
}

.method-band,
.base-grid,
.scenario,
.results {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.method-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--line);
}

.method-band > div {
  min-height: 116px;
  padding: 20px 22px;
  background: #fbfaf7;
}

.method-band strong {
  display: block;
  margin-bottom: 8px;
  color: var(--green-dark);
  font-size: 18px;
}

.method-band p,
.notice p {
  margin: 0;
  color: var(--muted);
}

.base-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
  padding: 24px;
  border-radius: 8px;
}

.section-title {
  grid-column: 1 / -1;
}

.section-title h2 {
  font-size: 24px;
  line-height: 1.18;
}

.section-title p {
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 920px;
  font-size: 14px;
}

label {
  display: grid;
  gap: 8px;
  min-width: 0;
}

label span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.field-note {
  color: var(--muted);
  font-size: 12px;
}

.field-caption {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 10px;
}

.help-toggle {
  width: 22px;
  min-width: 22px;
  min-height: 22px;
  height: 22px;
  display: inline-grid;
  place-items: center;
  margin: 0;
  border: 1px solid #b8c3d1;
  border-radius: 999px;
  background: #f4f7fb;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  line-height: 1;
  padding: 0;
}

.help-toggle:hover {
  background: #eaf0f8;
}

.help-toggle[aria-expanded="true"] {
  background: #dbe8f8;
  border-color: #8ba8c9;
}

.field-help {
  margin-top: 8px;
  border-left: 3px solid rgba(49, 90, 124, 0.4);
  background: #f4f8fd;
  color: #4f5f6f;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.45;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid #c9c3ba;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}

input[readonly] {
  background: #f7f5f1;
}

select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--green-dark) 50%),
    linear-gradient(135deg, var(--green-dark) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 20px,
    calc(100% - 12px) 20px;
  background-size: 6px 6px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

input:focus,
select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(31, 111, 91, 0.15);
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 22px;
}

.scenario {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-content: start;
  gap: 12px 16px;
  padding: 20px;
  border-radius: 8px;
}

.scenario--forecast {
  display: none;
}

.scenario > .section-title,
.scenario > .locked-row,
.scenario > .factor-section,
.scenario > .change-drawer {
  grid-column: 1 / -1;
}

.change-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 0 auto;
  color: var(--blue);
  font-size: 13px;
  font-weight: 650;
  white-space: nowrap;
}

.change-toggle input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--green);
}

.change-drawer {
  overflow: hidden;
  max-height: 340px;
  border-left: 3px solid rgba(31, 111, 91, 0.38);
  margin-top: -2px;
  margin-bottom: 6px;
  padding: 8px 0 0 12px;
  transition: max-height 0.18s ease, opacity 0.18s ease;
  opacity: 1;
}

.change-drawer[hidden] {
  display: block !important;
  max-height: 0;
  opacity: 0;
  margin: 0;
  padding-top: 0;
  border-left-color: transparent;
  pointer-events: none;
}

.factor-section {
  display: grid;
  gap: 8px;
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.factor-section h3 {
  margin: 0;
  color: var(--green-dark);
  font-size: 17px;
  line-height: 1.25;
}

.factor-section__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.factor-toggle {
  min-height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--blue);
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 650;
}

.factor-toggle:hover {
  background: #f4f7fb;
}

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

.factor-section[data-collapsed="yes"] .factor-grid {
  display: none;
}

[hidden] {
  display: none !important;
}

.locked-row {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 6px;
}

.locked-row strong {
  min-height: 26px;
  overflow-wrap: anywhere;
  font-size: 18px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

button {
  min-height: 48px;
  border: 0;
  border-radius: 6px;
  background: var(--green);
  color: #fff;
  padding: 12px 18px;
  font-weight: 750;
  cursor: pointer;
}

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

button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--green-dark);
}

button.secondary:hover {
  background: #f2eee7;
}

.results {
  margin-top: 22px;
  padding: 24px;
  border-radius: 8px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.summary-item {
  min-height: 102px;
  padding: 16px;
  border-radius: 8px;
}

.summary-item strong {
  overflow-wrap: anywhere;
}

.summary-item.is-positive strong {
  color: var(--red);
}

.summary-item.is-negative strong {
  color: var(--green-dark);
}

.results-footer__item.is-positive strong {
  color: var(--red);
}

.results-footer__item.is-negative strong {
  color: var(--green-dark);
}

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

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #eee8de;
  color: #344041;
  font-size: 14px;
}

td:first-child {
  color: var(--muted);
  font-weight: 650;
}

tr:last-child td {
  border-bottom: 0;
}

.notice {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.notice p {
  border-left: 4px solid var(--green);
  background: #f4f7f2;
  padding: 12px 14px;
  border-radius: 6px;
}

.notice p.warning {
  border-left-color: var(--amber);
  background: #fff7e8;
  color: #5f4519;
}

.notice p.danger {
  border-left-color: var(--red);
  background: #fff0ef;
  color: #6f2d29;
}

.results-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 45;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid var(--line);
  background: var(--line);
  box-shadow: 0 -8px 22px rgba(26, 31, 36, 0.14);
}

.results-footer__item {
  min-height: 68px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 10px 12px;
  background: #fff;
}

.results-footer__item span {
  color: var(--muted);
  font-size: 12px;
}

.results-footer__item strong {
  color: var(--ink);
  font-size: 16px;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

@media (max-width: 980px) {
  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .base-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scenario-grid,
  .summary-grid,
  .method-band {
    grid-template-columns: 1fr;
  }

  .scenario,
  .factor-grid,
  .results-footer {
    grid-template-columns: 1fr;
  }

  .results-footer {
    max-height: 46vh;
    overflow: auto;
  }
}

@media (max-width: 640px) {
  .topbar,
  main {
    width: min(100% - 24px, 1320px);
  }

  .topbar {
    padding-top: 24px;
  }

  .topbar h1 {
    font-size: 28px;
  }

  .base-grid,
  .scenario,
  .results {
    padding: 18px;
  }

  .base-grid {
    grid-template-columns: 1fr;
  }

  .factor-grid {
    grid-template-columns: 1fr;
  }

  .actions {
    display: grid;
  }

  button {
    width: 100%;
  }
}