* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #4472C4;
  --primary-hover: #3461a8;
  --danger: #c0392b;
  --danger-hover: #a93226;
  --bg: #f5f6fa;
  --card: #fff;
  --border: #dde1e7;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --radius: 8px;
}

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

/* Header */
.header {
  background: var(--primary);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.header h1 { font-size: 20px; font-weight: 600; }

/* Layout */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card h2 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

/* Monat/Jahr Auswahl */
.month-select {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.month-select label {
  font-size: 14px;
  font-weight: 500;
}
.month-select select,
.month-select input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background .15s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* Tabelle */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th {
  font-weight: 600;
  font-size: 12px;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: .3px;
}
tr.selected { background: #e8f0fe; }
tr:hover { background: #f8f9fa; }
td.center, th.center { text-align: center; }

/* Checkbox in Tabelle */
.row-check { width: 18px; height: 18px; cursor: pointer; }

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-overlay.active { display: flex; }
#login-overlay { background: var(--bg); }
.modal {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  width: 380px;
  max-width: 90vw;
  box-shadow: 0 8px 30px rgba(0,0,0,.18);
}
.modal h3 {
  font-size: 16px;
  margin-bottom: 16px;
}
.modal .form-group {
  margin-bottom: 14px;
}
.modal label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 4px;
}
.modal input,
.modal select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
}
.modal .btn-group {
  margin-top: 18px;
  justify-content: flex-end;
}

/* Status */
.status-bar {
  font-size: 13px;
  color: var(--text-light);
  padding: 8px 0;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 16px;
}
.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: var(--text-light);
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Responsive */
@media (max-width: 600px) {
  .container { padding: 12px; }
  .card { padding: 14px; }
  .month-select { gap: 8px; }
}