:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1d2330;
  --muted: #6b7280;
  --border: #e3e6eb;
  --primary: #1f8f5f;
  --primary-hover: #187650;
  --danger: #b42318;
  --warn-bg: #fff4d6;
  --warn-text: #7a5600;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
header h1 { font-size: 18px; margin: 0; }
header nav { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
header a { color: var(--muted); text-decoration: none; }
header a:hover { color: var(--text); }

main { max-width: 1000px; margin: 0 auto; padding: 24px; }
.muted { color: var(--muted); }

/* Anmelde-/Einladungskarte */
.karte {
  max-width: 380px;
  margin: 10vh auto 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.karte h1 { font-size: 20px; margin: 0 0 4px; }
.karte p { margin: 0 0 18px; }

label { display: block; font-weight: 600; margin: 12px 0 4px; font-size: 14px; }
input, select {
  width: 100%;
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

button {
  font: inherit;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}
button:hover { background: #f0f2f5; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
button.primary:hover { background: var(--primary-hover); }
button.voll { width: 100%; margin-top: 18px; }
button.klein { padding: 4px 9px; font-size: 13px; }

.meldung { margin-top: 12px; color: var(--danger); font-size: 14px; }
.meldung.ok { color: var(--primary); }

/* Dashboard-Kacheln */
.kacheln { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.kachel {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  color: inherit;
  text-decoration: none;
  transition: border-color .15s, box-shadow .15s;
}
.kachel:hover { border-color: var(--primary); box-shadow: 0 2px 10px rgba(0, 0, 0, .06); }
.kachel h2 { font-size: 16px; margin: 0 0 6px; }
.kachel p { margin: 0; color: var(--muted); font-size: 14px; }

/* Verwaltung */
section { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; margin-bottom: 20px; }
section h2 { font-size: 16px; margin: 0 0 12px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); vertical-align: middle; font-size: 14px; }
th { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
td input, td select { padding: 5px 8px; font-size: 14px; }
td.aktionen { white-space: nowrap; text-align: right; }
.formzeile { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 8px; align-items: end; }
.formzeile label { margin: 0 0 4px; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 4px; font-size: 12px; font-weight: 600; background: #eef0f3; color: var(--muted); }
.tag.gruen { background: #e8f5ee; color: var(--primary); }
.tag.gelb { background: var(--warn-bg); color: var(--warn-text); }
.linkbox { margin-top: 10px; padding: 10px; background: var(--warn-bg); border-radius: 8px; font-size: 14px; word-break: break-all; }

@media (max-width: 700px) {
  main, header { padding-left: 16px; padding-right: 16px; }
  table, thead, tbody, tr, td { display: block; }
  thead { display: none; }
  tr { border-bottom: 1px solid var(--border); padding: 8px 0; }
  td { border: 0; padding: 3px 0; }
  td.aktionen { text-align: left; }
}