:root {
  color-scheme: light dark;
  --color-bg: #f7f6f3;
  --color-surface: #ffffff;
  --color-text: #1f2124;
  --color-muted: #6b6f76;
  --color-border: #e2e0db;
  --color-primary: #5b3aa0;
  --color-primary-contrast: #ffffff;
  --color-danger: #b3261e;
  --color-success: #1e6b3a;
  --radius: 10px;

  /* Kategoriale Palette für die Stadt-Farbcodierung im Kalender (validiert:
     adjacent CVD ΔE 9.1, normal-vision ΔE 19.6, beides über dem Zielwert). */
  --city-color-1: #2a78d6;
  --city-color-2: #eb6834;
  --city-color-3: #1baf7a;
  --city-color-4: #eda100;
  --city-color-5: #e87ba4;
  --city-color-6: #008300;
  --city-color-7: #4a3aa7;
  --city-color-8: #e34948;
  --city-color-other: #898781;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #17181a;
    --color-surface: #212226;
    --color-text: #ecebe9;
    --color-muted: #a0a3a8;
    --color-border: #34363a;
    --color-primary: #a889e0;
    --color-primary-contrast: #17181a;
    --color-danger: #ff8983;
    --color-success: #7bd8a0;

    --city-color-1: #3987e5;
    --city-color-2: #d95926;
    --city-color-3: #199e70;
    --city-color-4: #c98500;
    --city-color-5: #d55181;
    --city-color-6: #008300;
    --city-color-7: #9085e9;
    --city-color-8: #e66767;
    --city-color-other: #898781;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-decoration: none;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-header nav a {
  color: var(--color-text);
  text-decoration: none;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-narrow {
  max-width: 480px;
}

.page-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

h1 {
  margin: 0 0 0.25rem;
}

.filter-form {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.filter-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.filter-fields > div {
  flex: 1 1 180px;
}

.filter-fields label {
  margin-top: 0;
}

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

section {
  margin-bottom: 2rem;
}

label {
  display: block;
  margin: 0.9rem 0 0.3rem;
  font-weight: 600;
  font-size: 0.9rem;
}

input[type="text"],
input[type="password"],
input[type="date"],
input[type="number"],
select {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400;
}

.checkbox input {
  width: auto;
}

.radio-group {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.75rem;
}

.radio {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 400;
}

.radio input {
  width: auto;
}

.field-hint {
  font-size: 0.8rem;
  margin: 0.4rem 0 0;
}

button,
.button {
  display: inline-block;
  margin-top: 1.25rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: 6px;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

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

.button-danger,
.link-button-danger {
  background: transparent;
  color: var(--color-danger);
}

.button-danger {
  border: 1px solid var(--color-danger);
}

.danger-form {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.link-button {
  background: none;
  border: none;
  color: var(--color-text);
  text-decoration: underline;
  padding: 0;
  margin: 0;
  cursor: pointer;
  font: inherit;
}

.inline-form {
  display: inline;
}

.field-error {
  color: var(--color-danger);
  font-size: 0.85rem;
  margin: 0.25rem 0 0;
}

.flash {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.flash-success {
  background: color-mix(in srgb, var(--color-success) 15%, transparent);
  color: var(--color-success);
}

.flash-error {
  background: color-mix(in srgb, var(--color-danger) 15%, transparent);
  color: var(--color-danger);
}

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

.event-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.event-card a {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1rem 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

.event-list-past {
  opacity: 0.75;
}

.participation-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.4rem;
}

.badge {
  background: color-mix(in srgb, var(--color-primary) 15%, transparent);
  color: var(--color-primary);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-muted {
  background: color-mix(in srgb, var(--color-muted) 20%, transparent);
  color: var(--color-muted);
}

.participation-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.participation-actions a {
  color: var(--color-text);
}

/* Monatskalender */

.calendar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.calendar-nav h2 {
  margin: 0;
  font-size: 1.1rem;
  min-width: 10ch;
  text-align: center;
}

.calendar-nav-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.calendar-weekday {
  background: var(--color-bg);
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-align: center;
  padding: 0.4rem 0;
}

.calendar-day {
  background: var(--color-surface);
  min-height: 5.5rem;
  padding: 0.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.calendar-day-out {
  background: var(--color-bg);
  opacity: 0.55;
}

.calendar-day-number {
  font-size: 0.8rem;
  color: var(--color-muted);
  align-self: flex-end;
}

.calendar-day-today .calendar-day-number {
  color: var(--color-primary-contrast);
  background: var(--color-primary);
  border-radius: 999px;
  width: 1.4rem;
  height: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: flex-end;
}

.calendar-event {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  line-height: 1.3;
  padding: 0.1rem 0.2rem;
  border-radius: 4px;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
}

.calendar-event:hover {
  background: var(--color-bg);
}

.calendar-event-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.calendar-event-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .calendar-day {
    min-height: 3.5rem;
  }

  .calendar-weekday {
    font-size: 0.65rem;
  }
}

.city-color-1 { background: var(--city-color-1); }
.city-color-2 { background: var(--city-color-2); }
.city-color-3 { background: var(--city-color-3); }
.city-color-4 { background: var(--city-color-4); }
.city-color-5 { background: var(--city-color-5); }
.city-color-6 { background: var(--city-color-6); }
.city-color-7 { background: var(--city-color-7); }
.city-color-8 { background: var(--city-color-8); }
.city-color-0 { background: var(--city-color-other); }

.calendar-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.25rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.calendar-legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.calendar-legend-swatch {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 3px;
  flex-shrink: 0;
}