:root {
  --bg: #f5f7fa;
  --panel: #ffffff;
  --ink: #1c2430;
  --muted: #657286;
  --line: #dce3eb;
  --teal: #16836f;
  --blue: #2563eb;
  --red: #c2413b;
  --amber: #b7791f;
  --soft: #eef6f3;
  --shadow: 0 14px 34px rgba(28, 36, 48, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

button,
input,
textarea,
select {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  padding: 24px 18px;
  background: #18212f;
  color: #f8fafc;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 22px;
}

.mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 8px;
  background: var(--teal);
  font-weight: 800;
}

.brand span {
  display: block;
  margin-top: 3px;
  color: #b8c5d6;
  font-size: 12px;
}

.primary,
.secondary {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
}

.primary {
  color: #fff;
  background: var(--teal);
}

.secondary {
  color: var(--teal);
  background: #e7f3ef;
}

.small {
  padding: 8px 11px;
  font-size: 13px;
}

.full {
  width: 100%;
}

.side-nav {
  display: grid;
  gap: 8px;
  margin: 18px 0;
}

.side-nav-item {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px 12px;
  color: #dce7f3;
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
}

.side-nav-item.active {
  border-color: #5ee0c4;
  color: #fff;
  background: rgba(22, 131, 111, 0.3);
}

.baseline-box {
  display: grid;
  gap: 7px;
  margin-bottom: 16px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.baseline-box label {
  color: #b8c5d6;
  font-size: 12px;
}

.baseline-box select {
  width: 100%;
  border: 0;
  border-radius: 8px;
  padding: 9px 10px;
  color: var(--ink);
}

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

.scenario-card {
  display: grid;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
}

.scenario-card.active {
  border-color: #5ee0c4;
  background: rgba(22, 131, 111, 0.28);
}

.scenario-item {
  width: 100%;
  text-align: left;
  border: 0;
  padding: 0;
  color: #e8eef6;
  background: transparent;
  cursor: pointer;
}

.scenario-item span {
  display: block;
  margin-top: 4px;
  color: #b8c5d6;
  font-size: 12px;
}

.scenario-badge {
  display: inline-block;
  margin-top: 7px;
  border-radius: 999px;
  padding: 3px 7px;
  color: #082f28;
  background: #8ee8d3;
  font-size: 11px;
  font-weight: 800;
}

.compare-toggle {
  display: flex;
  gap: 7px;
  align-items: center;
  color: #dce7f3;
  font-size: 12px;
}

.compare-toggle input {
  accent-color: #5ee0c4;
}

.main {
  padding: 26px;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

.topbar {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.topbar p {
  margin: 0 0 6px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.topbar h1 {
  margin: 0;
  font-size: 30px;
  letter-spacing: 0;
}

.title-editor {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.title-input {
  width: min(560px, 68vw);
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--ink);
  background: transparent;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0;
}

.title-input:focus {
  border-color: var(--line);
  outline: 0;
  background: #fff;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.compare-panel {
  margin-bottom: 16px;
}

.compare-picker-panel {
  margin-bottom: 16px;
}

.compare-picker {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 10px;
}

.compare-pick {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfe;
}

.compare-pick input {
  margin-top: 3px;
  accent-color: var(--teal);
}

.compare-pick strong,
.compare-pick span {
  display: block;
}

.compare-pick span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.compare-card {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfc;
}

.compare-card.current {
  border-color: var(--teal);
  box-shadow: inset 0 0 0 1px rgba(22, 131, 111, 0.18);
}

.compare-card h3 {
  margin: 0;
  font-size: 17px;
}

.compare-card small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
}

.compare-metrics {
  display: grid;
  gap: 8px;
}

.compare-metric {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

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

.compare-metric strong {
  text-align: right;
}

.compare-empty {
  color: var(--muted);
  padding: 8px 0;
}

.metric {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.metric span {
  color: var(--muted);
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 25px;
}

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

.metric-delta {
  display: inline-flex;
  margin-top: 9px;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 800;
  background: #edf2f7;
}

.metric-delta.up {
  color: #0f6b56;
  background: #e0f5ef;
}

.metric-delta.down {
  color: #9b2c2c;
  background: #fbe7e5;
}

.grid {
  display: grid;
  grid-template-columns: minmax(360px, 1.15fr) minmax(320px, 0.85fr);
  gap: 16px;
}

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

.panel.wide {
  grid-column: span 1;
}

.panel-head {
  display: flex;
  gap: 10px;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 14px;
}

.panel h2 {
  margin: 0;
  font-size: 18px;
}

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

.control {
  display: grid;
  gap: 9px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.control:first-child {
  border-top: 0;
}

.control-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}

.control-label span:last-child {
  color: var(--teal);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.range-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

.assumption-note {
  width: 100%;
  min-height: 62px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  color: var(--ink);
  background: #fbfcfe;
}

.assumption-note:focus {
  border-color: var(--teal);
  outline: 0;
}

.output-list,
.audit-list {
  display: grid;
  gap: 10px;
}

.output-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px;
  border-radius: 8px;
  background: var(--soft);
}

.output-item span,
.audit-item span {
  color: var(--muted);
  font-size: 12px;
}

.output-item strong {
  font-size: 18px;
}

.table-wrap {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 11px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
}

.audit-item {
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.audit-item strong {
  display: block;
  margin-bottom: 3px;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  max-width: 360px;
  padding: 12px 14px;
  border-radius: 8px;
  color: #fff;
  background: #18212f;
  opacity: 0;
  transform: translateY(10px);
  transition: 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

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

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