:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #dfe2e6;
  --text: #1f2933;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --danger: #dc2626;
  --warn-bg: #fef3c7;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }

.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
  background: var(--card); padding: 2rem 2.5rem; border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.08); width: 320px; display: flex; flex-direction: column; gap: .75rem;
}
.login-card h1 { margin: 0; font-size: 1.3rem; }
.login-card .subtitle { margin: 0 0 .5rem; color: var(--muted); font-size: .9rem; }
.login-card label { display: flex; flex-direction: column; font-size: .85rem; gap: .25rem; }
.login-card input { padding: .5rem; border: 1px solid var(--border); border-radius: 6px; font-size: .95rem; }
.login-card button { margin-top: .5rem; padding: .6rem; border: none; border-radius: 6px; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }
.login-card button:hover { background: var(--accent-dark); }
.error { color: var(--danger); font-size: .85rem; margin: 0; }

.app-header {
  display: flex; align-items: center; gap: 1.5rem; padding: .75rem 1.5rem;
  background: var(--card); border-bottom: 1px solid var(--border);
}
.app-header h1 { font-size: 1.1rem; margin: 0; }
#main-nav { display: flex; gap: .5rem; flex: 1; }
.nav-btn {
  border: 1px solid transparent; background: none; padding: .5rem .9rem; border-radius: 6px;
  cursor: pointer; font-size: .9rem; color: var(--muted);
}
.nav-btn.active, .nav-btn:hover { background: #eef2ff; color: var(--accent-dark); }
.header-user { display: flex; align-items: center; gap: .75rem; font-size: .85rem; color: var(--muted); }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; font-size: .85rem; padding: 0; }

#app-content { padding: 1.5rem; max-width: 1100px; margin: 0 auto; }
section { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }
h2 { margin-top: 0; }
.hint { color: var(--muted); font-size: .85rem; }

.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; margin-top: .75rem; }
.data-table th, .data-table td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-weight: 600; }
.data-table tr.changeover td { border-top: 2px dashed var(--danger); }
.data-table tr.allergen-free { background: #f0fdf4; }

.entity-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: .75rem 1.25rem; }
.entity-form label { display: flex; flex-direction: column; font-size: .85rem; gap: .25rem; }
.entity-form label.full { grid-column: 1 / -1; }
.entity-form input, .entity-form select { padding: .45rem; border: 1px solid var(--border); border-radius: 6px; font-size: .9rem; }
.entity-form button { grid-column: 1 / -1; justify-self: start; padding: .55rem 1.2rem; border: none; border-radius: 6px; background: var(--accent); color: #fff; font-weight: 600; cursor: pointer; }
.entity-form button:hover { background: var(--accent-dark); }
.form-msg { grid-column: 1 / -1; margin: 0; font-size: .85rem; }
.form-msg.error { color: var(--danger); }
.form-msg.success { color: #16a34a; }

.stammdaten-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; background: none; border: none; padding: 0; }
.stammdaten-grid > div { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.25rem; }
.inline-form { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: .75rem; }
.inline-form.stacked { flex-direction: column; }
.inline-form input { flex: 1; padding: .4rem; border: 1px solid var(--border); border-radius: 6px; min-width: 0; }
.inline-form button { border: none; background: var(--accent); color: #fff; border-radius: 6px; padding: .4rem .75rem; cursor: pointer; }
.checkbox-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .25rem .75rem; font-size: .8rem; margin: .25rem 0; }
.checkbox-grid label { display: flex; align-items: center; gap: .35rem; font-weight: normal; }
.entity-list { list-style: none; padding: 0; margin: 0; font-size: .85rem; display: flex; flex-direction: column; gap: .35rem; }
.entity-list li { display: flex; justify-content: space-between; gap: .5rem; border-bottom: 1px solid var(--border); padding-bottom: .35rem; }
.entity-list .badge { display: inline-block; background: var(--warn-bg); border-radius: 4px; padding: 0 .35rem; font-size: .72rem; margin-left: .25rem; }