:root {
  --color-primary: #1a1a1a;
  --color-accent: #e63946;
  --color-bg: #ffffff;
  --color-bg-soft: #f7f7f8;
  --color-bg-input: #ffffff;
  --color-border: #e5e5e8;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b70;
  --color-success: #2a9d5c;
  --color-warning: #c98a1a;
  --color-danger: #d1453b;
  --color-success-bg: #eaf7ef;
  --color-warning-bg: #fbf1de;
  --color-danger-bg: #fdeceb;
  --color-info: #2563a8;
  --color-info-bg: #eef4fb;
  --on-accent: #ffffff;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --max-width: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="dark"] {
  --color-bg: #14161a;
  --color-bg-soft: #1d2025;
  --color-bg-input: #1a1d22;
  --color-border: #2c3038;
  --color-text: #eef0f2;
  --color-text-muted: #9aa0a8;
  --color-success: #4bc384;
  --color-warning: #e0a53f;
  --color-danger: #f0736a;
  --color-success-bg: #163325;
  --color-warning-bg: #3a2c12;
  --color-danger-bg: #3a1c1a;
  --color-info: #7cb0e8;
  --color-info-bg: #17293d;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

html { color-scheme: light; }
html[data-theme="dark"] { color-scheme: dark; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.15s ease, color 0.15s ease;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; margin: 0 0 0.5em; letter-spacing: -0.01em; }
h1 { font-size: 1.9rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header / Nav ---------- */

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
}
.brand img { height: 32px; width: auto; display: block; }

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  color: var(--color-text);
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--color-accent); }
.theme-toggle .icon-dark { display: none; }
[data-theme="dark"] .theme-toggle .icon-light { display: none; }
[data-theme="dark"] .theme-toggle .icon-dark { display: inline; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.main-nav a { color: var(--color-text); font-weight: 500; font-size: 0.95rem; }
.main-nav a:hover { color: var(--color-accent); text-decoration: none; }
.main-nav .admin-link { color: var(--color-accent); }

.nav-toggle { display: none; }

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0.4rem 0.6rem;
    font-size: 1.1rem;
    cursor: pointer;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    padding-bottom: 0.75rem;
    gap: 0.75rem;
  }
  .main-nav.open { display: flex; }
}

/* ---------- Layout helpers ---------- */

.page { padding: 2rem 0 4rem; }
.stack { display: flex; flex-direction: column; gap: 1rem; }
.row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }
.row.between { justify-content: space-between; }
.muted { color: var(--color-text-muted); }
.text-small { font-size: 0.85rem; }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  box-shadow: var(--shadow);
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

/* ---------- Buttons & forms ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-soft);
  color: var(--color-text);
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { text-decoration: none; border-color: var(--color-accent); }
.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: var(--on-accent); }
.btn-primary:hover { opacity: 0.92; }
.btn-danger { background: var(--color-bg); border-color: var(--color-danger); color: var(--color-danger); }
.btn-small { padding: 0.3rem 0.65rem; font-size: 0.82rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

form.inline { display: inline; }

label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 0.3rem; }
input[type="text"], input[type="email"], input[type="password"], input[type="number"],
input[type="datetime-local"], input[type="date"], input[type="color"], input[type="file"],
select, textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-bg-input);
  color: var(--color-text);
}
textarea { min-height: 120px; resize: vertical; }
.form-group { margin-bottom: 1rem; }
.form-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.form-row .form-group { flex: 1 1 200px; }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; font-weight: 500; }
.help-text { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 0.25rem; }

/* ---------- Alerts / badges ---------- */

.alert { padding: 0.75rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: 0.9rem; border: 1px solid transparent; }
.alert-error { background: var(--color-danger-bg); color: var(--color-danger); }
.alert-success { background: var(--color-success-bg); color: var(--color-success); }
.alert-info { background: var(--color-info-bg); color: var(--color-info); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}
.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-bg); color: var(--color-danger); }
.badge-muted { background: var(--color-bg-soft); color: var(--color-text-muted); }

/* ---------- Table ---------- */

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

/* ---------- Sitzplan (Teilnehmeransicht + Editor teilen sich .edit-cell, siehe unten) ---------- */

.legend { display: flex; gap: 1rem; flex-wrap: wrap; font-size: 0.82rem; margin-bottom: 0.5rem; }
.legend-item { display: flex; align-items: center; gap: 0.4rem; }
.legend-swatch { width: 14px; height: 14px; border-radius: 4px; border: 1px solid var(--color-border); }

/* ---------- Sitzplan-Editor ---------- */

.tool-btn.active { background: var(--color-accent); border-color: var(--color-accent); color: var(--on-accent); }

.editor-grid-wrap { overflow: auto; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 1rem; background: var(--color-bg-soft); }
.editor-grid {
  display: grid;
  gap: 3px;
  width: max-content;
  user-select: none;
  -webkit-user-select: none;
}
.edit-cell {
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.55rem;
  font-weight: 700;
  font-family: inherit;
  color: var(--color-text-muted);
  cursor: pointer;
  overflow: hidden;
  white-space: nowrap;
  touch-action: none;
  padding: 0;
  margin: 0;
  appearance: none;
  -webkit-appearance: none;
}
.edit-cell.seat { background: var(--color-bg-soft); border-color: var(--color-accent); color: var(--color-text); }
.edit-cell.seat.occupied { background: var(--color-warning-bg); border-style: dashed; color: var(--color-warning); }
.edit-cell.info { background: var(--color-info-bg); color: var(--color-info); font-size: 0.5rem; }
.edit-cell:hover { outline: 2px solid var(--color-accent); outline-offset: -2px; }

/* ---------- Photo gallery ---------- */

.photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 0.75rem;
}
.photo-grid figure { margin: 0; position: relative; }
.photo-grid img { width: 100%; height: 160px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--color-border); }
.photo-grid figcaption { display: flex; justify-content: flex-end; margin-top: 0.3rem; }

/* ---------- Misc ---------- */

.stat-row { display: flex; gap: 1rem; flex-wrap: wrap; }
.stat-tile { flex: 1 1 140px; background: var(--color-bg-soft); border-radius: var(--radius); padding: 1rem; text-align: center; }
.stat-tile .value { font-size: 1.6rem; font-weight: 700; }
.stat-tile .label { font-size: 0.8rem; color: var(--color-text-muted); }

footer.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
  padding: 1.5rem 0;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}
footer.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }

.auth-shell {
  max-width: 420px;
  margin: 3rem auto;
  padding: 0 1.25rem;
}
.auth-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}
.auth-logo img {
  max-height: 180px;
  max-width: 100%;
  width: auto;
  object-fit: contain;
}
.auth-shell h1 { text-align: center; }