:root {
  --bg: #eef3f8;
  --card: #ffffff;
  --text: #18212d;
  --muted: #5c6b7a;
  --primary: #0c4f93;
  --primary-dark: #082f57;
  --ink: #071d33;
  --brand-blue: #0b5baa;
  --danger: #b42318;
  --success: #067647;
  --border: #d7dee8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background:
    radial-gradient(circle at 8% 0%, rgba(11, 91, 170, 0.13), transparent 28rem),
    linear-gradient(180deg, #f7fbff 0%, var(--bg) 46%, #f8fafc 100%);
  color: var(--text);
}

.site-header {
  background:
    linear-gradient(135deg, rgba(7, 29, 51, 0.98), rgba(8, 47, 87, 0.96)),
    radial-gradient(circle at 18% 30%, rgba(35, 117, 205, 0.38), transparent 28rem);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 18px 44px rgba(7, 29, 51, 0.16);
  color: #fff;
}

.site-header-inner {
  align-items: center;
  display: flex;
  gap: 1.2rem;
  justify-content: space-between;
  margin: 0 auto;
  min-height: 78px;
  width: min(1180px, 92vw);
}

.brand {
  align-items: center;
  color: #fff;
  display: inline-flex;
  gap: 0.85rem;
  text-decoration: none;
}

.brand:hover {
  color: #fff;
}

.brand-mark {
  align-items: center;
  background: #fff;
  border: 8px solid rgba(11, 91, 170, 0.62);
  border-radius: 50%;
  color: var(--primary-dark);
  display: inline-flex;
  font-size: 0.82rem;
  font-weight: 900;
  height: 48px;
  justify-content: center;
  letter-spacing: 0.04em;
  width: 48px;
}

.brand strong {
  display: block;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand small {
  color: #c8d8ea;
  display: block;
  font-size: 0.78rem;
  margin-top: 0.1rem;
}

.site-nav {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: flex-end;
}

.site-nav a {
  border: 1px solid transparent;
  border-radius: 999px;
  color: #dbeafe;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.48rem 0.75rem;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.container {
  width: min(1120px, 92vw);
  margin: 2rem auto;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 14px 34px rgba(7, 29, 51, 0.06);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.collapsible-card {
  padding-top: 0;
}

.collapsible-card:not([open]) {
  padding-bottom: 0;
}

.collapsible-card-summary {
  align-items: center;
  cursor: pointer;
  display: flex;
  gap: 0.8rem;
  justify-content: space-between;
  list-style: none;
  margin: 0 -1.25rem;
  padding: 1.25rem;
}

.collapsible-card-summary::-webkit-details-marker {
  display: none;
}

.collapsible-card-summary:hover {
  color: var(--primary);
}

.collapsible-card-title {
  color: var(--text);
  font-size: 1.5rem;
  font-weight: 700;
}

.collapsible-card-indicator {
  border-bottom: 2px solid currentColor;
  border-right: 2px solid currentColor;
  color: var(--primary);
  height: 0.65rem;
  transform: rotate(45deg);
  transition: transform 0.18s ease;
  width: 0.65rem;
}

.collapsible-card[open] .collapsible-card-indicator {
  transform: rotate(225deg);
}

h1,
h2,
h3 {
  margin-top: 0;
}

.row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.col {
  flex: 1 1 360px;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.4rem;
}

input,
select,
button,
textarea {
  font: inherit;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="datetime-local"],
select,
input[type="file"],
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  margin-bottom: 0.9rem;
  background: #fff;
}

.password-field {
  align-items: stretch;
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.password-field input {
  flex: 1 1 auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 0.03em;
  margin-bottom: 0;
  min-width: 0;
}

.password-field .btn {
  flex: 0 0 auto;
}

button,
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 0.62rem 1rem;
  background: var(--primary);
  color: white;
  cursor: pointer;
  text-decoration: none;
}

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

.btn.secondary {
  background: #e8eef5;
  color: #1b2b3a;
}

.btn.secondary:hover {
  background: #dbe7f2;
}

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

.btn.danger:hover,
button.danger:hover {
  background: #8f1b13;
}

.btn.certificate-download {
  background: linear-gradient(135deg, #087443, #0f9f6e);
  box-shadow: 0 12px 24px rgba(6, 118, 71, 0.22);
  font-weight: 800;
  padding: 0.85rem 1.2rem;
}

.btn.certificate-download:hover {
  background: linear-gradient(135deg, #065f46, #0b7d59);
}

.btn.certificate-download.small {
  box-shadow: none;
  margin-top: 0.45rem;
  padding: 0.62rem 0.9rem;
}

.alert {
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  margin-bottom: 1rem;
}

.alert.info {
  background: #eaf2ff;
  color: #1849a9;
  border: 1px solid #bfd7ff;
}

.alert.error {
  background: #fee4e2;
  color: #912018;
  border: 1px solid #fecdca;
}

.alert.success {
  background: #dcfae6;
  color: #065f46;
  border: 1px solid #abefc6;
}

table {
  width: 100%;
  border-collapse: collapse;
}

.audit-table {
  table-layout: fixed;
}

th,
td {
  padding: 0.65rem 0.55rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.sort-button {
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 800;
  padding: 0;
  text-align: left;
}

.sort-button:hover {
  background: transparent;
  color: var(--primary);
}

.sort-button::after {
  color: var(--muted);
  content: " ↕";
  font-size: 0.8em;
}

.sort-button[aria-sort="ascending"]::after {
  content: " ↑";
}

.sort-button[aria-sort="descending"]::after {
  content: " ↓";
}

.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 700;
}

.badge.offen {
  background: #eaf2ff;
  color: #1849a9;
}

.badge.abgeschlossen {
  background: #def7ec;
  color: #067647;
}

.muted {
  color: var(--muted);
}

code {
  background: #eef2f7;
  padding: 0.15rem 0.3rem;
  border-radius: 4px;
}

.nowrap {
  white-space: nowrap;
}

.user-agent {
  font-size: 0.85rem;
  overflow-wrap: anywhere;
}

.audit-note {
  border-top: 1px solid var(--border);
  margin: 1rem 0 0;
  padding-top: 0.85rem;
}

.canvas-wrap {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  overflow: auto;
  max-height: 76vh;
  text-align: center;
}

#pdf-canvas {
  max-width: 100%;
  height: auto;
}

.toolbar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 0.7rem;
}

.split-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
}

.course-file-header {
  align-items: center;
}

.metric {
  align-items: baseline;
  background: #eef6ff;
  border: 1px solid #c9ddf4;
  border-radius: 14px;
  display: flex;
  gap: 0.7rem;
  padding: 1rem;
}

.metric strong {
  color: var(--primary);
  font-size: 2.4rem;
}

.certificate-meta {
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 14px;
  display: grid;
  gap: 0.55rem 1rem;
  grid-template-columns: max-content 1fr;
  margin: 1rem 0;
  padding: 1rem;
}

.certificate-meta dt {
  color: var(--muted);
  font-weight: 800;
}

.certificate-meta dd {
  margin: 0;
}

.action-cell {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.action-cell form {
  margin: 0;
}

.checkbox-list {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 0 0 1rem;
  padding: 0.9rem;
}

.checkbox-list legend {
  font-weight: 700;
  padding: 0 0.35rem;
}

.checkbox-list label {
  align-items: flex-start;
  display: flex;
  gap: 0.55rem;
  font-weight: 500;
  margin: 0.45rem 0;
}

.checkbox-list input {
  margin-top: 0.2rem;
}

.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.reading-editor-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  margin: 1rem 0;
}

.reading-editor-grid label {
  color: var(--muted);
  font-weight: 700;
}

.reading-editor-grid input {
  margin-top: 0.35rem;
}

.check-row {
  align-items: flex-start;
  display: flex;
  gap: 0.55rem;
  font-weight: 700;
  margin: 0.75rem 0;
}

.check-row input {
  margin-top: 0.2rem;
}

.progress {
  font-weight: 600;
}

.certificate-panel {
  align-items: center;
  background:
    radial-gradient(circle at 12% 20%, rgba(255, 255, 255, 0.45), transparent 28%),
    linear-gradient(135deg, #e7fff4, #f4fbff 48%, #fffdf3);
  border: 1px solid #91e7bf;
  border-radius: 18px;
  box-shadow: 0 18px 42px rgba(6, 118, 71, 0.12);
  display: none;
  gap: 1rem;
  margin: 1rem 0;
  padding: 1.2rem;
}

.certificate-panel.is-visible {
  display: flex;
}

.certificate-panel-icon {
  align-items: center;
  background: #067647;
  border: 6px solid #c7f9dc;
  border-radius: 50%;
  color: #fff;
  display: flex;
  flex: 0 0 auto;
  font-size: 1.7rem;
  font-weight: 900;
  height: 64px;
  justify-content: center;
  width: 64px;
}

.certificate-panel-copy {
  flex: 1 1 auto;
}

.certificate-panel-copy h2 {
  margin: 0.15rem 0 0.35rem;
}

.certificate-panel-copy p {
  margin: 0;
}

.eyebrow {
  color: var(--success);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.dashboard-certificate {
  background: #ecfdf3;
  border: 1px solid #abefc6;
  border-radius: 12px;
  color: #065f46;
  padding: 0.75rem;
}

.reading-times {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem;
}

.reading-times summary {
  color: var(--primary-dark);
  cursor: pointer;
  font-weight: 800;
}

.reading-times-grid {
  display: grid;
  gap: 0.35rem 0.8rem;
  grid-template-columns: auto auto;
  margin-top: 0.65rem;
}

.reading-times-grid span {
  color: var(--muted);
}

.reading-times-grid strong {
  font-variant-numeric: tabular-nums;
}

.centered {
  max-width: 560px;
  margin: 8vh auto;
}

.verify-hero {
  background: linear-gradient(135deg, #0f5cab, #08345f);
  color: #fff;
  border-radius: 18px;
  padding: 2rem;
  margin-bottom: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.verify-hero h1 {
  font-size: clamp(2rem, 5vw, 3.7rem);
  margin: 0.4rem 0;
}

.verify-hero p {
  max-width: 680px;
  margin-bottom: 0;
  color: #dbeafe;
}

.verify-seal {
  width: 96px;
  height: 96px;
  border: 3px solid rgba(255, 255, 255, 0.75);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  font-weight: 800;
  flex: 0 0 auto;
}

.verify-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 1rem;
}

.verify-facts {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 0.7rem 1rem;
  margin: 0;
}

.verify-facts dt {
  color: var(--muted);
  font-weight: 700;
}

.verify-facts dd {
  margin: 0;
}

.topic-list {
  margin: 0;
  padding-left: 1.2rem;
}

.topic-list li {
  margin-bottom: 0.5rem;
}

@media (max-width: 780px) {
  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.9rem 0;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .container {
    width: 95vw;
  }

  th,
  td {
    font-size: 0.9rem;
  }

  .verify-hero {
    align-items: flex-start;
    flex-direction: column;
  }

  .verify-grid,
  .verify-facts {
    grid-template-columns: 1fr;
  }

  .split-header {
    flex-direction: column;
  }

  .action-cell {
    align-items: flex-start;
    flex-direction: column;
  }

  .password-field {
    flex-direction: column;
  }

  .certificate-panel {
    align-items: flex-start;
    flex-direction: column;
  }

  .certificate-panel .btn {
    text-align: center;
    width: 100%;
  }
}