:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #111827;
  --muted: #667085;
  --line: #d9e0e7;
  --blue: #2563eb;
  --green: #138a5b;
  --green-soft: #e7f7ef;
  --red: #c24141;
  --red-soft: #fff0f0;
  --amber: #b76b00;
  --amber-soft: #fff7df;
  --shadow: 0 18px 50px rgba(20, 30, 45, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 36px;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 30px;
  line-height: 1.15;
}

h2 {
  font-size: 18px;
  line-height: 1.2;
}

.market-chip {
  min-width: 130px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #eef3f9;
  color: #314154;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 0.8fr);
  gap: 16px;
  align-items: start;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

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

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

label,
.direction-group {
  display: grid;
  gap: 7px;
}

label span,
legend {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
  transition:
    border-color 140ms ease,
    box-shadow 140ms ease;
}

input:focus,
select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.segmented {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  min-height: 46px;
  padding: 3px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  background: #eef2f7;
}

.segment {
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #475467;
  font-weight: 800;
}

.segment.active {
  background: #ffffff;
  color: var(--blue);
  box-shadow: 0 1px 8px rgba(20, 30, 45, 0.12);
}

.action-row {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.primary-button,
.secondary-button,
.ghost-button {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 9px 14px;
  font-weight: 800;
  white-space: nowrap;
}

.primary-button {
  flex: 1;
  background: var(--blue);
  color: #ffffff;
}

.secondary-button {
  background: #e9eef5;
  color: #243247;
  border-color: #d1d9e3;
}

.ghost-button {
  background: #ffffff;
  color: #314154;
  border-color: var(--line);
}

.ghost-button.danger {
  color: var(--red);
}

.quote-panel {
  min-height: 100%;
}

.quote-price {
  margin: 10px 0 18px;
  font-size: 38px;
  font-weight: 900;
  line-height: 1.05;
}

.metric-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

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

.metric-list dt,
.stat-card span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.metric-list dd {
  margin: 0;
  font-weight: 800;
}

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

.decision-panel {
  grid-column: 1 / -1;
  display: grid;
  gap: 14px;
  border-left: 6px solid var(--amber);
}

.decision-panel.ok {
  border-left-color: var(--green);
}

.decision-panel.no {
  border-left-color: var(--red);
}

.decision-panel h2 {
  font-size: 28px;
}

.stat-card {
  min-height: 82px;
  display: grid;
  align-content: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfe;
}

.stat-card strong {
  font-size: 22px;
}

.reason-list,
.warning-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.reason-list li,
.warning-list li,
.suggestion-box {
  border-radius: 8px;
  padding: 10px 12px;
  line-height: 1.45;
}

.reason-list li {
  background: var(--green-soft);
  color: #0d5f40;
}

.decision-panel.no .reason-list li {
  background: var(--red-soft);
  color: #8a2d2d;
}

.warning-list li,
.suggestion-box {
  background: var(--amber-soft);
  color: #704400;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

th,
td {
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

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

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

.history-panel {
  grid-column: 1 / -1;
}

.button-pair {
  display: flex;
  gap: 8px;
}

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

.history-item {
  display: grid;
  grid-template-columns: 150px 1fr 110px 110px 110px;
  gap: 10px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #fbfcfe;
  font-size: 14px;
}

.history-item strong {
  font-size: 15px;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  border-radius: 8px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 900;
}

.badge.ok {
  background: var(--green-soft);
  color: var(--green);
}

.badge.no {
  background: var(--red-soft);
  color: var(--red);
}

.positive {
  color: var(--green);
}

.negative {
  color: var(--red);
}

[hidden] {
  display: none !important;
}

@media (max-width: 900px) {
  .app-shell {
    width: min(100% - 22px, 720px);
    padding-top: 16px;
  }

  .topbar,
  .workspace,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
    align-items: start;
  }

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

  .decision-stats,
  .metric-list div {
    grid-template-columns: 1fr;
  }

  .history-item {
    grid-template-columns: 1fr 1fr;
  }

  .action-row {
    position: sticky;
    bottom: 0;
    margin: 18px -18px -18px;
    padding: 12px 18px;
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(10px);
  }

  h1 {
    font-size: 26px;
  }
}

@media (max-width: 520px) {
  .panel {
    padding: 14px;
  }

  .panel-heading,
  .button-pair {
    align-items: stretch;
    flex-direction: column;
  }

  .quote-price {
    font-size: 32px;
  }

  .primary-button,
  .secondary-button,
  .ghost-button {
    width: 100%;
  }

  .history-item {
    grid-template-columns: 1fr;
  }
}