:root {
  --bg: #121212;
  --card: #1e1e1e;
  --text: #e0e0e0;
  --accent: #00bcd4;
  --border: #333;
  --danger: #ff5252;
  --ok: #4caf50;
  --chart-az: #00bcd4;
  --chart-lop: #ffca28;
  --chart-grid: #3a3a3a;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 16px;
  display: flex;
  justify-content: center;
}
.app-container {
  width: 100%;
  max-width: 520px;
}
.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
h1 {
  font-size: 1.3rem;
  color: var(--accent);
  margin: 0;
}
.btn-clear-all {
  background: transparent;
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  font-weight: bold;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 1.05rem;
  font-weight: bold;
  color: var(--accent);
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
}
.sub-title {
  font-size: 0.9rem;
  font-weight: bold;
  color: #aaa;
  margin: 12px 0 6px 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-group {
  margin-bottom: 12px;
}
label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 4px;
  color: #aaa;
}
.input-row {
  display: flex;
  gap: 6px;
  align-items: center;
  min-width: 0;
}

/* Section 2 Sightings Layout */
.sighting-item {
  margin-bottom: 8px;
}
.sighting-side-label {
  width: 16px;
  flex-shrink: 0;
  font-size: 0.85rem;
  color: #aaa;
  font-weight: bold;
  text-align: center;
}

.s-deg {
  min-width: 42px;
  flex: 1;
}

.s-min {
  min-width: 48px;
  flex: 1;
}

/* Inline layout for Section 1 Date, Celestial Body & Name */
.body-inline-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
}
.body-inline-col {
  flex: 1;
}

/* Section 3 Almanac Grid with Side Labels */
.almanac-table {
  background: #181818;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #2a2a2a;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.almanac-header-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 8px;
  align-items: flex-end;
}

.almanac-data-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 8px;
  align-items: center;
}

.almanac-row-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.almanac-inputs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  min-width: 0;
}

.side-label {
  color: #aaa;
  font-weight: bold;
  font-size: 0.85rem;
}

.col-header-box {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.col-header-box .col-time {
  font-size: 0.75rem;
  font-weight: bold;
  color: var(--accent);
  text-transform: uppercase;
}

.col-header-box .col-sub {
  font-size: 0.75rem;
  color: #aaa;
}

.almanac-col-border {
  border-right: 1px dashed var(--border);
  padding-right: 8px;
  min-width: 0;
}

/* All three almanac input boxes (Deg / Min / N-S) share equal, flexible
   width with no hard minimums, so a 3-box Declination row fits in the same
   column width as a 2-box GHA row -- which is also what keeps the Base|Next
   divider aligned vertically across the header, GHA, and Declination blocks
   (they all share the same .almanac-inputs-grid 1fr/1fr definition; forcing
   any one row's content wider than its 1fr share is what breaks alignment). */
.deg-box,
.min-box {
  flex: 1;
  min-width: 0;
  text-align: center;
  padding: 8px 2px;
  font-size: 0.92rem;
}

.select-compact {
  flex: 1;
  min-width: 0;
  width: auto !important;
  padding: 8px 0;
  text-align: center;
  font-size: 0.92rem;
}

/* Tighter gap specifically for 3-box rows (Deg / Min / N-S), since they have
   one more element competing for the same column width as a 2-box GHA row. */
.input-row-3 {
  gap: 4px;
}


input, select {
  background: #2a2a2a;
  border: 1px solid var(--border);
  color: #fff;
  padding: 8px;
  border-radius: 4px;
  font-size: 1rem;
  width: 100%;
  box-sizing: border-box;
  -webkit-appearance: none;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type=number] {
  -moz-appearance: textfield;
  appearance: textfield;
}
select {
  width: 110px;
}
.time-box {
  width: 36px;
  text-align: center;
  padding: 8px 2px;
}
.btn-add {
  background: transparent;
  border: 1px dashed var(--accent);
  color: var(--accent);
  padding: 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  width: 100%;
  margin-top: 6px;
}
.btn-del {
  background: var(--danger);
  color: #fff;
  border: none;
  padding: 8px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  flex-shrink: 0;
}
.btn-calc {
  width: 100%;
  background: var(--accent);
  color: #000;
  font-weight: bold;
  border: none;
  padding: 12px;
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  margin-top: 12px;
}
.btn-secondary {
  width: 100%;
  background: transparent;
  color: var(--accent);
  font-weight: bold;
  border: 1px solid var(--accent);
  padding: 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 8px;
}
.summary-box {
  background: #252525;
  padding: 10px;
  border-radius: 6px;
  border-left: 3px solid var(--accent);
  margin-top: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
}
.results {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}
.res-box {
  background: #252525;
  padding: 12px;
  border-radius: 6px;
  border-left: 3px solid var(--accent);
}
.res-label {
  font-size: 0.75rem;
  color: #888;
  text-transform: uppercase;
}
.res-value {
  font-size: 1.1rem;
  font-weight: bold;
  margin-top: 4px;
}
.input-error {
  border: 2px solid var(--danger) !important;
  background-color: rgba(255, 82, 82, 0.1) !important;
}
.error-msg {
  color: var(--danger);
  font-size: 0.75rem;
  margin-top: 4px;
  display: none;
  font-weight: bold;
}

.usno-status {
  font-size: 0.8rem;
  margin-top: 6px;
  min-height: 1.1em;
  line-height: 1.4;
}
.usno-status.loading {
  color: var(--accent);
}
.usno-status.ok {
  color: var(--ok);
}
.usno-status.error {
  color: var(--danger);
  font-weight: bold;
}
@keyframes autofillFlash {
  0% { background-color: rgba(76, 175, 80, 0.35); }
  100% { background-color: #2a2a2a; }
}
.autofilled-flash {
  animation: autofillFlash 1.2s ease-out;
}

/* --- Offline Almanac Cache --- */
.cache-blurb {
  font-size: 0.8rem;
  color: #aaa;
  margin: 0 0 12px 0;
  line-height: 1.45;
}
.cache-progress {
  font-size: 0.8rem;
  margin-top: 6px;
  min-height: 1.1em;
  line-height: 1.4;
}
.cache-progress.loading {
  color: var(--accent);
}
.cache-progress.ok {
  color: var(--ok);
}
.cache-progress.error {
  color: var(--danger);
  font-weight: bold;
}
.cache-summary-text {
  font-size: 0.8rem;
  color: #888;
  margin: 10px 0;
  line-height: 1.5;
}
.btn-danger-outline {
  border-color: var(--danger);
  color: var(--danger);
}

/* --- <details>/<summary> collapsible section (Offline Almanac Cache) --- */
details > summary.cache-summary-toggle {
  cursor: pointer;
  list-style: none;
  margin-bottom: 0;
  border-bottom: none;
  padding-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
details > summary.cache-summary-toggle::-webkit-details-marker {
  display: none;
}
details > summary.cache-summary-toggle::after {
  content: '\25BE';
  font-size: 0.8rem;
  color: #888;
  transition: transform 0.15s ease;
  margin-left: 8px;
}
details[open] > summary.cache-summary-toggle::after {
  transform: rotate(180deg);
}
details > summary.cache-summary-toggle {
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  margin-bottom: 12px;
}
details:not([open]) > summary.cache-summary-toggle {
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 0;
}

/* --- Searchable combo (Star Name autocomplete) --- */
.combo-wrap {
  position: relative;
}
.combo-list {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: 2px;
  background: #2a2a2a;
  border: 1px solid var(--border);
  border-radius: 4px;
  max-height: 220px;
  overflow-y: auto;
  z-index: 20;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
}
.combo-item {
  padding: 9px 12px;
  font-size: 0.9rem;
  cursor: pointer;
  border-bottom: 1px solid #333;
}
.combo-item:last-child {
  border-bottom: none;
}
.combo-item:hover,
.combo-item.active {
  background: var(--accent);
  color: #000;
}

/* --- Chart / Plot --- */
.chart-wrap {
  display: flex;
  justify-content: center;
}
.chart-svg {
  width: 100%;
  max-width: 340px;
  height: auto;
}
.chart-compass-label {
  font-size: 11px;
  fill: #888;
}
.chart-point-label {
  font-size: 12px;
  fill: var(--text);
  font-weight: bold;
}
.chart-az-label {
  font-size: 11px;
  fill: var(--chart-az);
  font-weight: bold;
}
.chart-legend {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
  font-size: 0.8rem;
  color: #aaa;
}
.chart-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.chart-swatch {
  display: inline-block;
  width: 18px;
  height: 0;
  border-top-width: 2.5px;
  border-top-style: solid;
}
.chart-swatch.az {
  border-top-color: var(--chart-az);
  border-top-style: dashed;
}
.chart-swatch.lop {
  border-top-color: var(--chart-lop);
}
.chart-caption {
  text-align: center;
  font-size: 0.8rem;
  color: #888;
  margin-top: 10px;
  line-height: 1.5;
}

/* --- Section 4: Save / Export / Saved Sightings --- */
.file-import-label {
  display: block;
  text-align: center;
  background: transparent;
  color: var(--accent);
  font-weight: bold;
  border: 1px solid var(--accent);
  padding: 10px;
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  margin-top: 8px;
}
.file-import-label input[type=file] {
  display: none;
}
.saved-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.saved-item {
  background: #252525;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.saved-item-info {
  font-size: 0.85rem;
  line-height: 1.3;
}
.saved-item-info .saved-item-title {
  font-weight: bold;
  color: var(--text);
}
.saved-item-info .saved-item-meta {
  color: #888;
  font-size: 0.75rem;
}
.saved-item-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}
.btn-mini {
  border: none;
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 0.75rem;
  font-weight: bold;
  cursor: pointer;
}
.btn-mini-load {
  background: var(--accent);
  color: #000;
}
.btn-mini-del {
  background: var(--danger);
  color: #fff;
}
.empty-note {
  font-size: 0.8rem;
  color: #888;
  font-style: italic;
  margin-top: 8px;
}
.toast {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #2a2a2a;
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}
.toast.show {
  opacity: 1;
}
.toast.error {
  border-color: var(--danger);
}