:root {
  color-scheme: light;
  --ink: #1d2630;
  --muted: #62717f;
  --line: #dbe3e8;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --blue: #1d5f96;
  --green: #17735a;
  --gold: #a66f00;
  --highlight: #fff0a6;
  --focus: #194f82;
  --shadow: 0 18px 50px rgba(29, 38, 48, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: #eef3f5;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.45;
}

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

button {
  cursor: pointer;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 86px;
  padding: 18px 24px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.topbar h1,
.viewer-toolbar h2,
.answer-heading h2,
.panel-section h2 {
  margin: 0;
  line-height: 1.15;
}

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

.eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.source-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.source-strip a,
.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  color: var(--ink);
  font-size: 13px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(230px, 300px) minmax(420px, 1fr) minmax(300px, 380px);
  gap: 16px;
  padding: 16px;
}

.library-panel,
.viewer-panel,
.assistant-panel {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.library-panel,
.assistant-panel {
  align-self: start;
}

.panel-section,
.ask-box,
.answer-panel,
.disclaimer {
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.panel-section:last-child,
.disclaimer {
  border-bottom: 0;
}

.field-label,
.rates-toolbar label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.search-input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
}

.search-input,
select {
  min-height: 40px;
  padding: 8px 10px;
}

textarea {
  min-height: 90px;
  resize: vertical;
  padding: 10px;
}

.search-input:focus,
textarea:focus,
select:focus,
button:focus-visible {
  outline: 3px solid rgba(25, 79, 130, 0.22);
  outline-offset: 2px;
}

.filter-toggle {
  width: 100%;
  min-height: 36px;
  margin-top: 8px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  color: var(--ink);
  font-weight: 700;
  text-align: center;
}

.filter-toggle[aria-pressed="true"] {
  border-color: var(--green);
  background: #e8f5f0;
  color: #0f4f3d;
}

.award-results {
  display: grid;
  gap: 8px;
  margin-top: 12px;
  max-height: 470px;
  overflow-y: auto;
  padding-right: 4px;
}

.award-result {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: 6px;
  background: #fff;
  text-align: left;
}

.award-result strong {
  display: block;
  margin-bottom: 4px;
}

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

.meta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  margin-top: 12px;
  font-size: 14px;
}

.meta-grid span {
  color: var(--muted);
}

.meta-grid strong {
  margin-bottom: 8px;
}

.soft-button,
.primary-button,
.action-row button,
.tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  color: var(--ink);
  font-weight: 700;
}

.soft-button {
  width: 100%;
  margin-top: 8px;
}

.link-button {
  text-decoration: none;
}

.link-button:hover {
  text-decoration: none;
  border-color: var(--blue);
}

.primary-button {
  width: 100%;
  margin-top: 10px;
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.viewer-panel {
  overflow: hidden;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.viewer-toolbar h2 {
  font-size: 20px;
}

.tabs {
  display: inline-grid;
  grid-auto-flow: column;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.tab {
  min-height: 34px;
  border-color: transparent;
  background: transparent;
  font-size: 13px;
}

.tab.is-active {
  background: #fff;
  border-color: var(--line);
}

.viewer-content,
.official-view,
.rates-view,
.pay-guide-view {
  height: calc(100vh - 140px);
  min-height: 620px;
  overflow: auto;
  background: #fbfcfd;
}

.official-view iframe,
.pay-guide-view iframe {
  display: block;
  width: 100%;
  height: calc(100% - 42px);
  min-height: 578px;
  border: 0;
  background: #fff;
}

.frame-note {
  margin: 0;
  padding: 10px 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.clause-card {
  margin: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.clause-card.is-highlighted {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 240, 166, 0.8);
}

.clause-card h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.clause-card p {
  margin: 8px 0;
}

.clause-card mark {
  padding: 1px 3px;
  border-radius: 3px;
  background: var(--highlight);
}

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

.clause-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 18px;
}

.primary-link-button,
.soft-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.primary-link-button {
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #fff;
}

.soft-link-button {
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
}

.rates-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(150px, 190px);
  gap: 10px;
  align-items: end;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.rates-toolbar label {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.rates-toolbar .primary-button {
  margin-top: 0;
}

.rate-output {
  padding: 16px;
}

.rate-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
}

.rate-table th,
.rate-table td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.rate-table th {
  background: var(--soft);
}

.api-note {
  margin: 0 0 12px;
  color: var(--muted);
}

.action-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.action-row button {
  min-height: 42px;
  padding: 7px 8px;
  font-size: 13px;
}

.answer-body {
  color: var(--ink);
}

.answer-body p {
  margin: 0 0 10px;
}

.answer-body ul,
.answer-body ol {
  margin: 8px 0 0;
  padding-left: 20px;
}

.answer-body li + li {
  margin-top: 5px;
}

.disclaimer {
  background: #fff8e5;
  color: #4c3900;
  font-size: 13px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(360px, calc(100vw - 36px));
  padding: 12px 14px;
  border-radius: 8px;
  background: #1d2630;
  color: #fff;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: minmax(220px, 280px) minmax(420px, 1fr);
  }

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

  .viewer-content,
  .official-view,
  .rates-view,
  .pay-guide-view {
    height: 680px;
  }
}

@media (max-width: 820px) {
  .topbar,
  .viewer-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .source-strip {
    justify-content: flex-start;
  }

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

  .viewer-content,
  .official-view,
  .rates-view,
  .pay-guide-view {
    height: auto;
    min-height: 0;
    max-height: none;
  }

  .official-view iframe,
  .pay-guide-view iframe {
    min-height: 620px;
  }

  .rates-toolbar,
  .action-row {
    grid-template-columns: 1fr;
  }

  .tabs {
    width: 100%;
  }

  .tab {
    width: 100%;
  }
}