:root {
  --tg-bg: #17212b;
  --tg-secondary-bg: #1c2733;
  --tg-text: #f5f5f5;
  --tg-hint: #8a97a3;
  --tg-link: #62bcf9;
  --tg-button: #4e9de0;
  --tg-button-text: #ffffff;
  --tg-border: #2b3945;
  --green: #4cd964;
  --yellow: #f5c542;
  --red: #ff5b5b;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  background: var(--tg-bg);
  color: var(--tg-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  padding-bottom: 90px;
}

.app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  position: sticky;
  top: 0;
  background: var(--tg-bg);
  z-index: 10;
  border-bottom: 1px solid var(--tg-border);
}

.app-bar h1 {
  font-size: 18px;
  margin: 0;
}

.app-bar .back-btn {
  background: none;
  border: none;
  color: var(--tg-link);
  font-size: 15px;
  padding: 4px 0;
}

.tabs {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
}

.tab {
  flex: 1;
  text-align: center;
  padding: 8px;
  border-radius: 10px;
  background: var(--tg-secondary-bg);
  color: var(--tg-hint);
  cursor: pointer;
  font-size: 14px;
}

.tab.active {
  background: var(--tg-button);
  color: var(--tg-button-text);
}

.screen {
  display: none;
  padding: 12px 16px;
}

.screen.active {
  display: block;
}

.empty-state {
  text-align: center;
  color: var(--tg-hint);
  padding: 48px 16px;
  font-size: 14px;
}

.tracker-card {
  background: var(--tg-secondary-bg);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 10px;
}

.tracker-card.paused {
  opacity: 0.55;
}

.tracker-route {
  font-size: 17px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.tracker-dates {
  color: var(--tg-hint);
  font-size: 13px;
  margin-top: 2px;
}

.tracker-price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.tracker-price {
  font-size: 20px;
  font-weight: 700;
}

.badge {
  font-size: 12px;
  border-radius: 8px;
  padding: 3px 8px;
  white-space: nowrap;
}

.badge-cheap { background: rgba(76, 217, 100, 0.15); color: var(--green); }
.badge-normal { background: rgba(245, 197, 66, 0.15); color: var(--yellow); }
.badge-expensive { background: rgba(255, 91, 91, 0.15); color: var(--red); }

.tracker-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.btn {
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  font-size: 13px;
  background: var(--tg-border);
  color: var(--tg-text);
  cursor: pointer;
  flex: 1;
}

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

.fab {
  position: fixed;
  right: 20px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--tg-button);
  color: var(--tg-button-text);
  font-size: 28px;
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  cursor: pointer;
}

.field {
  margin-bottom: 16px;
  position: relative;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--tg-hint);
  margin-bottom: 6px;
}

.field input, .field select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--tg-border);
  background: var(--tg-secondary-bg);
  color: var(--tg-text);
  font-size: 15px;
}

.origin-dest-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.origin-dest-row .field {
  flex: 1;
}

.swap-btn {
  background: var(--tg-secondary-bg);
  border: 1px solid var(--tg-border);
  color: var(--tg-text);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  font-size: 16px;
  cursor: pointer;
  margin-bottom: 16px;
}

.autocomplete-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--tg-secondary-bg);
  border: 1px solid var(--tg-border);
  border-radius: 10px;
  margin-top: 4px;
  max-height: 200px;
  overflow-y: auto;
  z-index: 20;
  display: none;
}

.autocomplete-list.open {
  display: block;
}

.autocomplete-item {
  padding: 10px 12px;
  cursor: pointer;
  font-size: 14px;
}

.autocomplete-item:hover, .autocomplete-item.highlighted {
  background: var(--tg-border);
}

.segmented {
  display: flex;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--tg-border);
}

.segmented button {
  flex: 1;
  padding: 9px;
  background: var(--tg-secondary-bg);
  color: var(--tg-hint);
  border: none;
  font-size: 13px;
  cursor: pointer;
}

.segmented button.active {
  background: var(--tg-button);
  color: var(--tg-button-text);
}

.date-range-row {
  display: flex;
  gap: 8px;
}

.date-range-row .field {
  flex: 1;
}

.benchmark-block {
  background: var(--tg-secondary-bg);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 16px;
  display: none;
}

.benchmark-block.visible {
  display: block;
}

.benchmark-block .title {
  font-size: 13px;
  color: var(--tg-hint);
  margin-bottom: 8px;
}

.benchmark-block .range {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.benchmark-block .sub {
  font-size: 12px;
  color: var(--tg-hint);
}

.benchmark-hist {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 40px;
  margin-top: 10px;
}

.benchmark-hist .bar {
  flex: 1;
  background: var(--tg-button);
  border-radius: 2px 2px 0 0;
  min-height: 3px;
}

.collapsible summary {
  cursor: pointer;
  padding: 10px 0;
  color: var(--tg-link);
  font-size: 14px;
  list-style: none;
}

.collapsible summary::-webkit-details-marker {
  display: none;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
}

.checkbox-row .hint {
  font-size: 12px;
  color: var(--tg-hint);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--tg-secondary-bg);
  border: 1px solid var(--tg-border);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.toast.visible {
  opacity: 1;
}