:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #666666;
  --color-border: #e0e0e0;
  --color-primary: #0a7d34;
  --color-primary-contrast: #ffffff;
  --color-error-bg: #fdecea;
  --color-error-text: #611a15;
  --color-success-bg: #eaf7ee;
  --color-success-text: #0a4020;
  --color-map-placeholder: #eeeeee;
  --map-tile-filter: none;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* Dark mode: system preference (unless explicitly overridden to light via
   the header toggle, which sets data-theme="light") ... */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #121212;
    --color-text: #e8e8e8;
    --color-muted: #a3a3a3;
    --color-border: #3a3a3a;
    --color-primary: #4fd67a;
    --color-primary-contrast: #0a2313;
    --color-error-bg: #3b1a17;
    --color-error-text: #ffb4a8;
    --color-success-bg: #123a20;
    --color-success-text: #8fe0ac;
    --color-map-placeholder: #2a2a2a;
    --map-tile-filter: invert(92%) hue-rotate(180deg) brightness(0.95) contrast(0.9);
  }
}

/* ... or the explicit toggle, which wins either direction regardless of
   system preference. */
:root[data-theme="dark"] {
  --color-bg: #121212;
  --color-text: #e8e8e8;
  --color-muted: #a3a3a3;
  --color-border: #3a3a3a;
  --color-primary: #4fd67a;
  --color-primary-contrast: #0a2313;
  --color-error-bg: #3b1a17;
  --color-error-text: #ffb4a8;
  --color-success-bg: #123a20;
  --color-success-text: #8fe0ac;
  --color-map-placeholder: #2a2a2a;
  --map-tile-filter: invert(92%) hue-rotate(180deg) brightness(0.95) contrast(0.9);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.4;
}

a {
  color: var(--color-primary);
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 1rem;
}

h1 {
  font-size: 1.4rem;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--color-muted);
  margin-top: 0;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.site-header .brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.site-header nav a,
.link-button {
  text-decoration: none;
  color: var(--color-primary);
  font: inherit;
}

.link-button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.inline-form {
  display: inline;
}

.lang-toggle {
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.8rem;
}

.theme-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.theme-toggle__option {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.5rem;
  font-size: 0.85rem;
  text-decoration: none;
  opacity: 0.4;
}

.theme-toggle__option--active {
  opacity: 1;
  background: var(--color-border);
}

.site-footer {
  max-width: 640px;
  margin: 2rem auto 1rem;
  padding: 0 1rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.map-wrap {
  position: relative;
  margin: 1rem 0;
}

.map {
  height: 260px;
  border-radius: 8px;
  background: var(--color-map-placeholder);
}

/* OpenStreetMap only serves light tiles; approximate a dark map with a
   filter rather than a whole second raster tile provider. */
.map .leaflet-tile-pane {
  filter: var(--map-tile-filter);
}

.map-recenter-button {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  z-index: 500;
  width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-primary);
  cursor: pointer;
}

.map-hint {
  margin: 0 0 1rem;
  color: var(--color-muted);
  font-size: 0.8rem;
}

.notice {
  color: var(--color-muted);
}

.station-list,
.station-picker-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.station-card {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem;
}

.no-price {
  color: var(--color-muted);
  font-size: 0.85rem;
  font-style: italic;
  margin: 0.5rem 0 0;
}

.station-card__head {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
}

.station-card__brand,
.station-card__permit {
  display: block;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.price-list {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.price-list li {
  display: flex;
  gap: 0.35rem;
}

.fuel-label {
  color: var(--color-muted);
}

.price-source-label {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-muted);
}

.price-list--official {
  margin-top: 0.15rem;
}

.price-list--official .price {
  color: var(--color-muted);
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1rem 0;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
}

input,
select,
button {
  font: inherit;
  padding: 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}

fieldset {
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.6rem;
}

button[type="submit"],
.button {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border: none;
  padding: 0.6rem 1rem;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: inline-block;
}

button[type="submit"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.button--secondary {
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.station-picker-list {
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.station-picker-list label {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.5rem;
}

.create-station-fields {
  margin-top: 0.5rem;
  padding-left: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hint {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0;
}

.error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
  padding: 0.6rem;
  border-radius: 6px;
}

.success-message {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  padding: 0.6rem;
  border-radius: 6px;
}