:root {
  --bg: #0f1117;
  --card: #1a1d27;
  --border: #2a2e3d;
  --text: #e4e6ee;
  --muted: #8b90a3;
  --accent: #6c9ef8;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  --nav-w: 240px;
}

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
  position: relative;
}

.brand-badge {
  position: absolute;
  top: 1.4rem;
  right: 1.6rem;
  text-align: right;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.55;
}

.brand-badge #changelog-link {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.68rem;
  color: var(--muted);
}

.brand-badge #changelog-link:hover {
  color: var(--accent);
}

.brand-badge .brand-name {
  display: block;
  color: var(--text);
  font-weight: 600;
}

.brand-badge em {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}

.brand-badge #brand-version {
  font-family: var(--mono);
  font-size: 0.72rem;
}

@media (max-width: 700px) {
  .brand-badge {
    position: static;
    display: block;
    margin-bottom: 1rem;
  }
}

h1 {
  font-size: 2rem;
  letter-spacing: -0.02em;
}

.subtitle {
  color: var(--muted);
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

.header-actions {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
}

#pdf-btn {
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-size: 0.9rem;
  cursor: pointer;
}

#pdf-btn {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

#pdf-btn:hover {
  filter: brightness(1.1);
}

main {
  flex: 1;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

.card-group {
  margin-bottom: 2rem;
}

.group-heading {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
  padding-bottom: 0.45rem;
  margin-bottom: 0.95rem;
  border-bottom: 2px solid var(--accent);
  cursor: pointer;
  scroll-margin-top: 12px;
  display: flex;
  align-items: baseline;
}

.group-heading::after {
  content: "#";
  margin-left: 0.5em;
  opacity: 0;
  color: var(--muted);
  font-weight: normal;
  transition: opacity 0.15s;
}

.group-heading:hover::after,
.group-heading:focus-visible::after {
  opacity: 1;
}

.group-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.card h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
}

.card table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.card td {
  padding: 0.45rem 1rem;
  vertical-align: top;
  word-break: break-word;
}

.card td:first-child {
  color: var(--muted);
  white-space: nowrap;
  width: 40%;
}

.card td:last-child {
  font-family: var(--mono);
}

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1.5rem;
}

.card-info {
  font-family: var(--mono);
  width: 1.2rem;
  height: 1.2rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-style: italic;
  font-size: 0.75rem;
  line-height: 1;
  cursor: help;
  margin-left: 0.45rem;
  vertical-align: middle;
}

.card-info:hover {
  color: var(--text);
  border-color: var(--muted);
}

.card-info-pop {
  margin-top: 0.5rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: rgba(108, 158, 248, 0.07);
  color: #c9cfdd;
  font-size: 0.82rem;
}

.card-note {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 0.25rem 1rem 0.9rem;
}

.card-note + .card-note {
  padding-top: 0;
}

.note-key {
  font-weight: 600;
  letter-spacing: 0.02em;
}

.preview-img {
  display: block;
  width: calc(100% - 2rem);
  margin: 0.25rem 1rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
}

#geo-btn {
  background: #e05d44;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-size: 0.9rem;
  cursor: pointer;
  margin: 0.25rem 1rem 1rem;
}

#geo-btn:disabled {
  opacity: 0.6;
  cursor: wait;
}

.geo-card table:not([hidden]) {
  margin-bottom: 1rem;
}

.osm-link {
  display: inline-block;
  margin: 0 1rem 1rem;
  color: var(--accent);
  font-size: 0.85rem;
}

.card.geo-card {
  grid-column: 1 / -1;
}

.geo-body {
  display: grid;
  grid-template-columns: 1fr 1fr 1.3fr;
  gap: 0.5rem 1.25rem;
  padding: 0.25rem 1rem 0.5rem;
}

@media (max-width: 760px) {
  .geo-body {
    grid-template-columns: 1fr;
  }
}

.geo-col-map {
  display: flex;
  flex-direction: column;
}

.geo-col .card-note {
  padding: 0.25rem 0 0.75rem;
}

.geo-col .osm-link {
  margin: 0;
}

.geo-map-btn {
  margin: 0 0 1rem;
  align-self: flex-start;
}

.geo-map {
  display: block;
  width: 100%;
  height: 280px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.card.webrtc-card td {
  display: block;
  width: auto;
  padding: 0.22rem 1rem;
  font-size: 0.78rem;
  white-space: normal;
  word-break: break-word;
}

.card.webrtc-card td:first-child {
  font-family: var(--mono);
  margin-top: 0.35rem;
}

.card.webrtc-card td:last-child {
  color: var(--muted);
  padding-top: 0;
}

.card.webrtc-card tr:last-child td:first-child {
  margin-top: 0.5rem;
}

.card td a {
  color: var(--accent);
  text-decoration: underline dotted;
}

.card td a:hover {
  text-decoration-style: solid;
}

#netlog {
  width: calc(100% - 2rem);
  max-width: 1100px;
  margin: 0 auto 1rem;
  background: #07090d;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  font-family: var(--mono);
}

.netlog-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.72rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  background: #10131b;
}

.netlog-prompt {
  color: #3fae5a;
  font-weight: 700;
}

.netlog-lines {
  padding: 0.6rem 0.9rem;
  max-height: 170px;
  overflow-y: auto;
  font-size: 0.75rem;
  line-height: 1.65;
  color: #a6adbb;
}

.netlog-line .t { color: #565c6c; margin-right: 0.6em; }
.netlog-line .k { margin-right: 0.55em; font-weight: 700; font-size: 0.68rem; letter-spacing: 0.05em; }
.netlog-line.ext .k { color: var(--accent); }
.netlog-line.int .k { color: #3fae5a; }
.netlog-line.warn { color: #d9a428; }
.netlog-line.warn .k { color: #d9a428; }
.netlog-line.muted-line { color: #565c6c; font-style: italic; }

#card-nav {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--nav-w);
  background: #12141d;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 1.1rem 0 2rem;
  z-index: 40;
}

.nav-brand {
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0 1.1rem 0.9rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.7rem;
}

.nav-brand em {
  font-style: normal;
  color: var(--accent);
  font-weight: 500;
}

#nav-groups .nav-start {
  display: block;
  padding: 0.85rem 1.1rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

#nav-groups .nav-start:hover {
  background: rgba(108, 158, 248, 0.08);
  color: var(--accent);
}

.nav-group-head {
  display: flex;
  align-items: center;
}

.nav-group-label,
#nav-groups a.nav-group-label {
  display: block;
  flex: 1;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-size: 0.62rem;
  color: var(--muted);
  padding: 0.9rem 0 0.3rem 1.1rem;
  text-decoration: none;
  border-left: none;
}

#nav-groups a.nav-group-label:hover {
  background: transparent;
  color: var(--text);
}

.nav-caret {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.72rem;
  line-height: 1;
  padding: 0.6rem 0.95rem 0.3rem;
  transition: transform 0.15s ease;
}

.nav-caret:hover { color: var(--text); }

.nav-caret.open {
  transform: rotate(90deg);
}

.nav-items { display: none; }

.nav-group.open .nav-items { display: block; }

#nav-groups a {
  display: block;
  padding: 0.34rem 1.1rem;
  font-size: 0.78rem;
  color: #b9bfd0;
  text-decoration: none;
  border-left: 2px solid transparent;
}

#nav-groups a:hover {
  color: var(--text);
  background: rgba(108, 158, 248, 0.08);
}

#nav-groups a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(108, 158, 248, 0.1);
}

#nav-burger {
  display: none;
  position: fixed;
  top: 0.8rem;
  left: 0.8rem;
  z-index: 60;
  width: 42px;
  height: 38px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

#nav-burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-open #nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open #nav-burger span:nth-child(2) { opacity: 0; }
.nav-open #nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

#nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: 35;
}

@media (min-width: 1101px) {
  header,
  main,
  #netlog,
  footer {
    margin-left: var(--nav-w);
  }
}

@media (max-width: 1100px) {
  #nav-burger {
    display: flex;
  }

  #card-nav {
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    box-shadow: 6px 0 24px rgba(0, 0, 0, 0.4);
  }

  .nav-open #card-nav {
    transform: translateX(0);
  }

  .nav-open #nav-backdrop {
    display: block;
  }

  header {
    padding-top: 3.6rem;
  }
}

.card {
  scroll-margin-top: 14px;
}

.card-action-btn {
  font-family: var(--mono);
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 0.45rem 0.9rem;
  font-size: 0.78rem;
  cursor: pointer;
  margin-top: 0.7rem;
}

.card-action-btn:hover { filter: brightness(1.12); }

.card-action-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

@media print {
  .card-info,
  .card-info-pop {
    display: none !important;
  }

  :root {
    --bg: #fff;
    --card: #fff;
    --border: #bbb;
    --text: #111;
    --muted: #555;
    --accent: #333;
  }

  body {
    background: #fff;
  }

  header {
    padding: 0.5rem 1rem;
  }

  .header-actions,
  #geo-btn,
  .osm-link,
  .geo-map-btn,
  .brand-badge,
  #netlog,
  #card-nav,
  #nav-burger,
  #nav-backdrop {
    display: none !important;
  }

  main {
    max-width: none;
    padding: 0.5rem;
  }

  .group-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
  }

  .card {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .preview-img {
    max-width: 220px;
  }

  footer::after {
    content: " – Aufzeichnung erstellt über datainfo.yourdata.education";
  }
}