body {
  font-family: Times, "Times New Roman", serif;
  max-width: 760px;
  margin: 2em auto;
  padding: 0 1em;
  background: #fff;
  color: #000;
}

header {
  margin-bottom: 1.5em;
}

h1 {
  font-size: 1.8em;
  margin-bottom: 0.1em;
}

.lede {
  margin-top: 0;
  color: #333;
  font-style: italic;
}

table {
  border-collapse: collapse;
  width: 100%;
}

th, td {
  border: 1px solid #000;
  padding: 4px 8px;
  text-align: left;
}

input, button, select {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 1em;
}

button {
  padding: 6px 14px;
  cursor: pointer;
  background: #fff;
  border: 1px solid #000;
}

button:hover {
  background: #f0f0f0;
}

#findBtn {
  background: #000;
  color: #fff;
  font-weight: bold;
}

#findBtn:hover {
  background: #333;
}

#openAllBtn {
  background: #fffacd;
}

.error {
  color: #a00;
}

.status {
  font-style: italic;
  margin: 1em 0;
  color: #060;
}

h2 {
  font-size: 1.2em;
  margin-top: 1.8em;
  border-bottom: 1px solid #000;
  padding-bottom: 2px;
}

h3 {
  font-size: 1em;
  margin-top: 1.2em;
  margin-bottom: 0.3em;
}

ul {
  margin-top: 0.3em;
  padding-left: 1.4em;
}

li { margin-bottom: 0.4em; }

.hint {
  font-size: 0.9em;
  color: #555;
  margin-top: 1em;
}

.callout {
  border: 2px solid #000;
  background: #ffffd0;
  padding: 0.8em 1em;
  margin: 1em 0;
}

table { margin-bottom: 0.5em; }
table a { font-weight: bold; }

/* Form layout */
.airports {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.5em;
  align-items: end;
  margin: 0.5em 0;
}

.combobox-field label {
  display: block;
  font-size: 0.9em;
  margin-bottom: 0.2em;
  color: #333;
}

#swapBtn {
  font-size: 1.2em;
  padding: 4px 10px;
  margin-bottom: 1px;
}

.dates {
  display: flex;
  gap: 1.5em;
  margin: 0.8em 0 0.2em 0;
  flex-wrap: wrap;
}

.dates p {
  margin: 0;
}

.dates label {
  display: flex;
  flex-direction: column;
  font-size: 0.9em;
  color: #333;
  gap: 0.2em;
}

.dates-hint {
  margin-top: 0.4em;
  margin-bottom: 1em;
}

.actions {
  display: flex;
  gap: 0.6em;
  margin: 1em 0 0.5em 0;
  flex-wrap: wrap;
}

.currency-toggle {
  font-size: 0.9em;
  color: #333;
  margin: 0.5em 0 1em 0;
}

.currency-toggle label {
  margin-right: 0.8em;
}

.alt-origins-checks {
  margin-top: 0.5em;
}

.alt-origins-title {
  margin: 0.6em 0 0.3em 0;
  font-size: 0.95em;
  color: #333;
}

.alt-origins-checks p {
  margin: 0.2em 0;
}

/* Combobox */
.combobox {
  position: relative;
}

.combobox input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid #000;
  background: #fff;
  box-sizing: border-box;
}

.combobox-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  z-index: 20;
  margin: 0;
  padding: 0;
  list-style: none;
  background: #fff;
  border: 1px solid #000;
  border-top: none;
  max-height: 280px;
  overflow-y: auto;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.combobox-list li {
  padding: 5px 10px;
  cursor: pointer;
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 0.95em;
}

.combobox-list li.active,
.combobox-list li:hover {
  background: #ffffd0;
}

.combobox-list li mark {
  background: #ffe066;
  color: inherit;
  padding: 0;
}

.combobox-empty {
  color: #888;
  font-style: italic;
  cursor: default !important;
}

/* Details / collapsibles */
details {
  margin: 0.8em 0;
  border-left: 3px solid #ccc;
  padding-left: 0.8em;
}

details[open] {
  border-left-color: #000;
}

details > summary {
  cursor: pointer;
  padding: 0.2em 0;
  font-size: 1em;
  list-style: revert;
}

details > summary:hover {
  color: #333;
}

@media (max-width: 600px) {
  body {
    margin: 1em auto;
  }
  .airports {
    grid-template-columns: 1fr;
  }
  #swapBtn {
    justify-self: center;
    margin: 0.2em 0;
    transform: rotate(90deg);
  }
}