* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background: #fff;
  color: #000;
  font-family: 'Courier New', Courier, monospace;
  padding: 20px;
}
/* Widen container to accommodate long timezone names and timeline */
.container {
  max-width: 900px;
  margin: 40px auto;
  border: 4px solid #000;
  padding: 20px;
}
header {
  border-bottom: 4px solid #000;
  margin-bottom: 20px;
  padding-bottom: 10px;
}
header h1 {
  font-size: 2rem;
  margin: 0;
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header p {
  font-size: 1rem;
}
label {
  display: block;
  margin-bottom: 10px;
  font-weight: bold;
}
input[type="text"],
button {
  width: 100%;
  border: 4px solid #000;
  padding: 10px;
  font-size: 1rem;
  background: transparent;
  color: #000;
  font-family: inherit;
}
/* Ensure autocomplete dropdown positions correctly */
.input-section,
.timezone-section {
  position: relative;
  margin-bottom: 20px;
}
button {
  margin-top: 10px;
  cursor: pointer;
}
button:hover {
  background: #000;
  color: #fff;
}
.reset-btn {
  margin-top: 10px;
  border: 4px solid #000;
  background: transparent;
  color: #000;
  font-family: inherit;
}
.theme-toggle-btn {
  width: auto;
  margin-left: 10px;
  border: 2px solid #000;
  padding: 2px 6px;
  font-size: 0.8rem;
  background: transparent;
  color: #000;
  font-family: inherit;
}
.tz-note {
  margin-top: 5px;
  font-size: 0.9rem;
}
.results-section {
  margin-top: 20px;
  border-top: 4px solid #000;
  padding-top: 10px;
}
body.dark .results-section {
  border-color: #fff;
}
.result-item {
  margin-bottom: 20px;
}
.result-item h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}
.result-item p {
  padding: 10px;
  border: 4px solid #000;
  background: #fff;
}
/* Copy button styling */
.copy-btn {
  display: inline-block;
  margin-top: 5px;
  width: auto;
  padding: 5px 10px;
  border: 4px solid #000;
  background: transparent;
  color: #000;
  font-size: 0.9rem;
  cursor: pointer;
  font-family: inherit;
}
.copy-btn:hover {
  background: #000;
  color: #fff;
}
.autocomplete-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  border: 4px solid #000;
  background: #fff;
  max-height: 200px;
  overflow-y: auto;
  z-index: 1000;
}
.autocomplete-item {
  padding: 8px;
  white-space: nowrap;
}
.autocomplete-item:hover,
.autocomplete-item.selected {
  background: #000;
  color: #fff;
}
/* Timezone tag list */
.timezone-list {
  margin-top: 5px;
  display: flex;
  flex-wrap: wrap;
}
/* Format selection buttons */
.format-section {
  margin: 20px 0;
}
.format-section label {
  display: block;
  font-weight: bold;
  margin-bottom: 8px;
}
.format-section fieldset {
  border: none;
  padding: 0;
  margin: 0;
}
.format-section legend {
  display: block;
  font-weight: bold;
  margin-bottom: 8px;
  font-family: 'Courier New', Courier, monospace;
  color: #000;
}
.fmt-btn {
  border: 4px solid #000;
  background: transparent;
  color: #000;
  padding: 6px 12px;
  margin-right: 6px;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
}
.fmt-btn:hover,
.fmt-btn.selected {
  background: #000;
  color: #fff;
}
/* Convert button distinct style */
button.convert-btn {
  background: #000;
  color: #fff;
  border: 4px solid #000;
}
button.convert-btn:hover {
  background: transparent;
  color: #000;
}
.tz-tag {
  display: inline-block;
  border: 4px solid #000;
  padding: 6px 10px;
  margin: 2px;
  font-family: inherit;
  font-size: 0.9rem;
  background: transparent;
  cursor: pointer;
}
.tz-tag:hover {
  background: #000 !important;
  color: #fff !important;
}
/* Conversion results list spacing */
.conversion-list .result-item {
  margin-top: 15px;
}
/* Screen reader only text */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 600px) {
  .container {
    margin: 20px;
    padding: 15px;
  }
  header h1 {
    font-size: 1.5rem;
  }
}

/* Timeline visualization */
.timeline {
  margin-top: 20px;
  margin-bottom: 50px;
}
.timeline-row {
  display: flex;
  align-items: center;
  /* Increase spacing so hour labels don’t overlap next row */
  margin-bottom: 24px;
}
.tz-label {
  width: 200px;
  font-weight: bold;
  margin-right: 8px;
}
.timeline-hours {
  display: flex;
}
.hour-block {
  width: 20px;
  height: 40px;
  border-left: 2px solid #000;
  position: relative;
}
body.dark .hour-block {
  border-left: 2px solid #fff;
}
.hour-block:first-child {
  border-left: none;
}
.hour-block::after {
  content: attr(data-hour);
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
}
.result-value {
  display: flex;
  align-items: stretch;
  gap: 10px;
  margin-top: 6px;
}
/* Ensure result text fills space and button matches height */
.result-value p {
  flex: 1;
  margin: 0;
}
.result-value .copy-btn {
  flex: 0 0 auto;
  margin-top: 0;
  /* Match the height of the text box by stretching and applying same vertical padding */
  align-self: stretch;
  padding: 10px;
  border: 4px solid #000;
  line-height: 1;
}

/* Dark mode styles */
body.dark {
  background: #000;
  color: #fff;
}
body.dark .container,
body.dark header {
  border-color: #fff;
}
body.dark input[type="text"],
body.dark button,
body.dark .reset-btn,
body.dark .theme-toggle-btn,
body.dark .fmt-btn,
body.dark .tz-tag,
body.dark .copy-btn,
body.dark .autocomplete-dropdown,
body.dark .result-item p {
  background: #333;
  color: #fff;
  border-color: #fff;
}
body.dark button:hover,
body.dark .fmt-btn:hover,
body.dark .fmt-btn.selected,
body.dark .reset-btn:hover,
body.dark .tz-tag:hover,
body.dark .copy-btn:hover,
body.dark .theme-toggle-btn:hover,
body.dark .autocomplete-item:hover,
body.dark .autocomplete-item.selected {
  background: #fff;
  color: #000;
}
body.dark button.convert-btn {
  background: #fff;
  color: #000;
}
body.dark button.convert-btn:hover {
  background: #333;
  color: #fff;
}