:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #1f2937;
  --muted: #475569;
  --primary: #2563eb;
  --primary-dark: #1e3a8a;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --amber: #f59e0b;
  --amber-bg: #fef3c7;
  --red: #ef4444;
  --red-bg: #fee2e2;
  --slate: #64748b;
  --slate-bg: #f1f5f9;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 22px 60px;
}

h1 {
  color: #0f172a;
  border-bottom: 3px solid var(--primary);
  padding-bottom: 10px;
  margin-bottom: 8px;
}

h1 a { color: inherit; text-decoration: none; }

.meta {
  color: var(--muted);
  font-size: 0.95em;
  margin-bottom: 30px;
}

a { color: var(--primary); }

.intro {
  background: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 16px 20px;
  margin-bottom: 30px;
  border-radius: 4px;
}

.intro h2 { margin-top: 0; color: var(--primary-dark); font-size: 1.05em; }
.intro ul { margin: 8px 0 0; padding-left: 22px; }
.intro li { margin-bottom: 4px; }

.deadline-banner {
  background: var(--amber-bg);
  border: 1px solid var(--amber);
  color: #78350f;
  padding: 10px 16px;
  border-radius: 6px;
  margin-bottom: 22px;
  font-size: 0.95em;
}

.deadline-banner.past {
  background: var(--red-bg);
  border-color: var(--red);
  color: #7f1d1d;
}

.back-link { margin: 0 0 6px; }
.back-link a {
  text-decoration: none;
  font-size: 0.9em;
  color: var(--muted);
}

.strong-meta {
  font-size: 1em;
  color: #0f172a;
  font-weight: 600;
}

.login-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
  gap: 20px;
  align-items: end;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 20px;
  margin-bottom: 28px;
}

.login-panel h2 {
  color: var(--primary-dark);
  font-size: 1.05em;
  margin: 0 0 4px;
}

.login-panel p { margin: 0; color: var(--muted); }

.login-form label { margin-bottom: 6px; }

.login-row {
  display: flex;
  gap: 8px;
}

.login-row input {
  text-transform: uppercase;
  font-size: 1.1em;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.slim-error { margin: 10px 0 0; padding: 8px 10px; }

/* Themen-Übersicht (öffentlich) */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.topic-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: inherit;
  min-height: 100%;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.topic-card:hover,
.topic-card:focus-visible {
  border-color: #93c5fd;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
  outline: none;
  transform: translateY(-1px);
}

.topic-card .nr {
  font-size: 0.8em;
  color: var(--muted);
  letter-spacing: 0.5px;
}

.topic-card .titel {
  font-weight: 600;
  color: var(--primary-dark);
  font-size: 1em;
  line-height: 1.3;
}

.topic-card-summary {
  color: var(--muted);
  font-size: 0.9em;
  margin: 0;
}

.topic-card .schwerpunkte { margin-top: auto; }

.card-cta {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9em;
  margin-top: 4px;
}

.schwerpunkt {
  display: inline-block;
  background: var(--green-bg);
  color: #14532d;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.78em;
  margin-right: 4px;
  margin-top: 4px;
}

.topic-card-img {
  width: 100%;
  height: 110px;
  object-fit: cover;
  border-radius: 6px;
  background: #f1f5f9;
  border: 1px solid var(--border);
}

/* Themen-Detail */
.topic-detail {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px 26px;
  margin-bottom: 22px;
}

.topic-detail h2 {
  margin-top: 0;
  color: var(--primary-dark);
  font-size: 1.3em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.topic-detail h3 {
  color: #334155;
  font-size: 1em;
  margin-top: 18px;
  margin-bottom: 6px;
}

.topic-detail-img {
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  background: #f8fafc;
}

.workflow-section {
  background: #eef6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 18px 20px 2px;
  margin-bottom: 22px;
}

.workflow-section h2 {
  color: var(--primary-dark);
  font-size: 1.15em;
  margin: 0 0 14px;
}

.workflow-section .card {
  box-shadow: none;
}

.muted-card {
  background: #f8fafc;
  color: var(--muted);
}

.quellen {
  background: var(--amber-bg);
  border-left: 3px solid var(--amber);
  padding: 8px 12px;
  margin-top: 8px;
  border-radius: 3px;
  font-size: 0.95em;
}

.hinweise {
  background: var(--slate-bg);
  border-left: 3px solid var(--slate);
  padding: 8px 12px;
  margin-top: 8px;
  border-radius: 3px;
  font-size: 0.95em;
}

.requirements-panel {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 18px 0;
}

.requirements-panel h3 { margin-top: 0; }

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.requirements-grid ul {
  margin: 6px 0 0;
  padding-left: 18px;
}

.requirements-grid li { margin-bottom: 4px; }

.task-list {
  display: grid;
  gap: 10px;
  margin: 10px 0 14px;
}

.task-card {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: #ffffff;
}

.task-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9em;
}

.task-content p { margin: 0; }

.task-hint {
  margin-top: 8px;
  padding: 8px 10px;
  border-left: 3px solid var(--amber);
  background: var(--amber-bg);
  border-radius: 4px;
  font-size: 0.92em;
}

/* Forms */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 18px;
}

.card h3 { margin-top: 0; color: var(--primary-dark); }

.form-row { margin-bottom: 14px; }

label {
  display: block;
  font-weight: 600;
  font-size: 0.9em;
  margin-bottom: 4px;
  color: #334155;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="file"],
textarea,
select {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 5px;
  padding: 8px 10px;
  font-size: 1em;
  font-family: inherit;
  background: #fff;
}

textarea { min-height: 100px; resize: vertical; }

.btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 5px;
  padding: 10px 18px;
  font-size: 1em;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

.btn:hover { background: var(--primary-dark); }

.btn.secondary {
  background: white;
  color: var(--text);
  border: 1px solid #cbd5e1;
}

.btn.secondary:hover { background: #f1f5f9; }

.btn.danger { background: var(--red); }

.code-pill {
  display: inline-block;
  background: #0f172a;
  color: #ffffff;
  border-radius: 6px;
  padding: 4px 9px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 1.05em;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.small-code { font-size: 0.9em; }

.qr-code-pill { margin-top: 8px; }

.compact-card p { margin-bottom: 0; }

.notice {
  background: var(--green-bg);
  border-left: 3px solid var(--green);
  padding: 10px 14px;
  border-radius: 4px;
  margin-bottom: 16px;
  font-size: 0.95em;
}

.error {
  background: var(--red-bg);
  border-left: 3px solid var(--red);
  padding: 10px 14px;
  border-radius: 4px;
  margin-bottom: 16px;
  font-size: 0.95em;
  color: #7f1d1d;
}

/* Status-Badges */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.85em;
  font-weight: 600;
  color: white;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95em;
  background: var(--card);
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

th { background: #e2e8f0; font-weight: 600; }
tr:hover td { background: #f8fafc; }

td a { color: var(--primary); text-decoration: none; font-weight: 500; }
td a:hover { text-decoration: underline; }

/* QR-Übersicht */
.qr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
}

.qr-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  text-align: center;
}

.qr-card img {
  width: 100%;
  height: auto;
  background: white;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.qr-card .titel {
  font-size: 0.85em;
  margin-top: 8px;
  color: #334155;
  min-height: 2.4em;
}

footer {
  margin-top: 50px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.85em;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 600px) {
  .container { padding: 16px 12px 40px; }
  .topic-detail { padding: 16px 18px; }
  .workflow-section { padding: 14px 14px 1px; }
  .card { padding: 16px 18px; }
  h1 { font-size: 1.45em; }
  .login-panel { grid-template-columns: 1fr; gap: 14px; }
  .login-row { flex-direction: column; }
  .login-row .btn { width: 100%; text-align: center; }
  .topic-grid { grid-template-columns: 1fr; gap: 12px; }
  .topic-card { padding: 14px; }
  .topic-card-img { height: 96px; }
  .requirements-grid { grid-template-columns: 1fr; gap: 12px; }
  .task-card { grid-template-columns: 30px minmax(0, 1fr); gap: 10px; }
  .task-number { width: 26px; height: 26px; }
}