:root {
  --rot: #CC0000;
  --rot-dark: #990000;
  --schwarz: #1a1a1a;
  --grau: #666;
  --hellgrau: #f0f0f0;
  --bg: #f8f8f8;
  --card: #fff;
  --gruen-0: #1b5e20;
  --gruen-1: #2e7d32;
  --gruen-2: #66bb6a;
  --gruen-3: #a5d6a7;
  --gruen-4: #e8f5e9;
  --gelb: #fff9c4;
  --rot-belegt: #ffcdd2;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg); color: #333; min-height: 100vh;
}

.header {
  background: linear-gradient(135deg, var(--schwarz), #333);
  color: #fff; padding: 16px 0; position: relative; overflow: hidden;
}
.header::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px; background: var(--rot);
}
.header-inner { max-width: 1100px; margin: 0 auto; padding: 0 16px; display: flex; align-items: center; gap: 16px; }
.header-text h1 { font-size: 1.3em; }
.header-text p { opacity: .75; font-size: .85em; }

.nav {
  background: var(--card); border-bottom: 1px solid #ddd; position: sticky; top: 0; z-index: 10;
}
.nav-inner { max-width: 1100px; margin: 0 auto; display: flex; }
.nav a, .nav span {
  padding: 12px 20px; text-decoration: none; color: var(--grau); font-size: 13px;
  font-weight: 600; border-bottom: 3px solid transparent; transition: .2s; cursor: pointer;
}
.nav a:hover, .nav span:hover { color: var(--schwarz); }
.nav a.active, .nav span.active { color: var(--rot); border-bottom-color: var(--rot); }

.container { max-width: 1100px; margin: 0 auto; padding: 16px; }

.section {
  background: var(--card); border-radius: 12px; padding: 20px; margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}
.section h2 {
  font-size: 1.05em; margin-bottom: 16px; color: var(--schwarz);
  display: flex; align-items: center; gap: 8px;
  border-bottom: 2px solid var(--hellgrau); padding-bottom: 10px;
}

/* Ampelfarben für Belegungsgrad */
.beleg-0 { background: var(--gruen-0); color: #fff; }
.beleg-1 { background: var(--gruen-1); color: #fff; }
.beleg-2 { background: var(--gruen-2); color: #fff; }
.beleg-3 { background: var(--gruen-3); color: #333; }
.beleg-4 { background: var(--gruen-4); color: #333; }

/* Wochen-Ampel Grid */
.week-grid {
  display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px;
}
.week-day {
  border-radius: 10px; padding: 14px 8px; text-align: center; min-height: 90px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  transition: transform .15s; cursor: default;
}
.week-day:hover { transform: translateY(-2px); }
.week-day .day-name { font-size: 12px; font-weight: 700; text-transform: uppercase; opacity: .9; }
.week-day .day-date { font-size: 22px; font-weight: 800; margin: 4px 0; }
.week-day .day-status { font-size: 11px; font-weight: 600; }
.week-day .day-info { font-size: 10px; opacity: .8; margin-top: 2px; }
.week-day.today { box-shadow: 0 0 0 3px var(--rot); }

/* 30-Min-Raster */
.grid-30 {
  width: 100%; border-collapse: collapse; font-size: 13px;
}
.grid-30 th {
  background: var(--schwarz); color: #fff; padding: 8px 6px;
  font-size: 11px; font-weight: 600; text-align: center;
  position: sticky; top: 48px; z-index: 2;
}
.grid-30 th:first-child { border-radius: 8px 0 0 0; }
.grid-30 th:last-child { border-radius: 0 8px 0 0; }
.grid-30 td {
  border: 1px solid #eee; padding: 2px 4px; text-align: center;
  font-size: 12px; height: 32px; vertical-align: middle;
}
.grid-30 .time-cell {
  font-weight: 600; font-size: 11px; color: var(--grau);
  background: #fafafa; white-space: nowrap; width: 60px;
}
.grid-30 .slot-free { background: #e8f5e9; color: #2e7d32; font-size: 10px; }
.grid-30 .slot-team {
  font-weight: 600; font-size: 11px; padding: 2px 4px; border-radius: 4px;
  color: #fff;
}
.grid-30 .slot-occupied { font-size: 10px; color: var(--grau); }
.grid-30 tr:hover td { background: #fafafa; }

/* Belegungs-Ampel in der Grid-Spalte */
.ampel-cell { font-size: 11px; font-weight: 600; }

/* Buttons */
.btn {
  padding: 8px 20px; border: 2px solid var(--rot); border-radius: 20px;
  background: #fff; color: var(--rot); font-size: 13px; font-weight: 700;
  cursor: pointer; transition: all .2s; text-decoration: none; display: inline-block;
}
.btn:hover { background: var(--rot); color: #fff; }
.btn-sm { padding: 4px 12px; font-size: 11px; }
.btn-primary { background: var(--rot); color: #fff; }
.btn-primary:hover { background: var(--rot-dark); }

/* Navigation */
.week-nav {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px;
}
.week-nav button {
  padding: 6px 14px; border: 1px solid #ddd; border-radius: 6px;
  background: #fff; cursor: pointer; font-size: 13px; font-weight: 600;
}
.week-nav button:hover { background: #f0f0f0; }
.week-nav span { font-weight: 600; font-size: 14px; }
.week-nav .today-btn { margin-left: auto; }

/* Admin Formular */
.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; color: var(--grau); margin-bottom: 4px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 8px 12px; border: 1px solid #ddd; border-radius: 8px;
  font-size: 14px; font-family: inherit;
}
.form-group input:focus, .form-group select:focus { outline: none; border-color: var(--rot); }
.form-row { display: flex; gap: 12px; }
.form-row .form-group { flex: 1; }

/* Quarter-Buttons */
.quarter-btns { display: flex; gap: 8px; }
.quarter-btn {
  padding: 8px 16px; border: 2px solid #ddd; border-radius: 8px;
  background: #fff; cursor: pointer; font-size: 13px; font-weight: 600;
  transition: all .15s; user-select: none;
}
.quarter-btn.active { border-color: var(--rot); background: #fff5f5; color: var(--rot); }

/* Admin Feld-Ansicht */
.field-view {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 16px 0;
}
.field-quarter {
  border: 2px solid #ddd; border-radius: 10px; padding: 12px;
  min-height: 80px; position: relative;
}
.field-quarter h4 { font-size: 12px; color: var(--grau); margin-bottom: 6px; }
.field-quarter .slot-tag {
  display: inline-block; padding: 4px 10px; border-radius: 6px;
  font-size: 12px; font-weight: 600; color: #fff; margin: 2px;
}

/* Session-Liste */
.session-item {
  display: flex; align-items: center; gap: 12px; padding: 10px 0;
  border-bottom: 1px solid #eee; font-size: 13px;
}
.session-item:last-child { border-bottom: none; }
.session-item .team-badge {
  display: inline-block; padding: 2px 10px; border-radius: 10px;
  font-size: 12px; font-weight: 600; color: #fff;
}
.session-actions { margin-left: auto; display: flex; gap: 6px; }
.session-actions button {
  padding: 4px 10px; border: 1px solid #ddd; border-radius: 6px;
  background: #fff; cursor: pointer; font-size: 11px;
}
.session-actions button:hover { background: #f0f0f0; }
.session-actions .del-btn { color: var(--rot); border-color: var(--rot); }

/* Login-Overlay */
.login-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,.6); display: flex; align-items: center;
  justify-content: center; z-index: 100; overflow-y: auto;
}
.login-box {
  background: var(--card); border-radius: 12px; padding: 32px;
  max-width: 360px; width: 90%; box-shadow: 0 8px 32px rgba(0,0,0,.3);
  margin: 20px auto;
}
.login-box h2 { margin-bottom: 16px; }
.login-box input { width: 100%; padding: 10px 14px; border: 1px solid #ddd;
  border-radius: 8px; font-size: 16px; margin-bottom: 12px; }
.login-box .error { color: var(--rot); font-size: 13px; margin-bottom: 8px; display: none; }

/* Toast */
.toast {
  position: fixed; bottom: 20px; right: 20px; padding: 12px 24px;
  border-radius: 8px; color: #fff; font-weight: 600; font-size: 13px;
  z-index: 200; display: none; box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
.toast.success { background: #2e7d32; }
.toast.error { background: #c62828; }

/* Responsive */
@media (max-width: 768px) {
  .nav a, .nav span { padding: 10px 8px; font-size: 11px; }
  .login-box { padding: 20px 16px; }
  .week-nav { gap: 6px; }
  .week-nav button { padding: 5px 10px; font-size: 12px; }
  .week-nav .today-btn { margin-left: 0; }
  .week-nav span { font-size: 12px; }
  .week-grid { grid-template-columns: repeat(7, 1fr); gap: 4px; }
  .week-day { padding: 10px 4px; min-height: 70px; }
  .week-day .day-date { font-size: 16px; }
  .grid-30 { font-size: 11px; }
  .grid-30 td { font-size: 10px; height: 28px; padding: 1px 2px; }
  .grid-30 .time-cell { width: 45px; font-size: 10px; }
  .form-row { flex-direction: column; gap: 0; }
  .field-view { grid-template-columns: 1fr; }
}
/* Sub-Navigation (einheitlich) */
.subnav { background: var(--card); border-bottom: 1px solid #ddd; }
.subnav-inner { max-width: 1100px; margin: 0 auto; display: flex; padding: 8px 16px; gap: 8px; flex-wrap: wrap; }
.subnav-inner button { padding: 8px 20px; border: 2px solid #ddd; border-radius: 20px; background: #fff; color: var(--grau); font-size: 13px; font-weight: 700; cursor: pointer; transition: all .2s; white-space: nowrap; }
.subnav-inner button.active { border-color: var(--rot); background: #fff5f5; color: var(--rot); }
.subnav-inner button:hover { border-color: var(--rot); }
@media (max-width: 768px) {
  .subnav-inner { padding: 6px 8px; gap: 4px; }
  .subnav-inner button { padding: 6px 12px; font-size: 11px; }
}