@charset "UTF-8";

@font-face {
  font-family: Inter;
  src: url("assets/Inter/Inter-VariableFont_opsz,wght.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: Inter;
  src: url("assets/Inter/Inter-Italic-VariableFont_opsz,wght.ttf") format("truetype");
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}

:root {
  --toolbar-height: 3.5rem;
  --viewer: #525659;
  --toolbar: #323639;
  --toolbar-text: #f1f3f4;
  --paper: #fff;
  --ink: #111827;
  --text: #374151;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #0f766e;
  --accent-soft: #e8f6f4;
  --accent-bright: #5eead4;
  --cover: #0b1a1f;
  --warn: #c2410c;
  --warn-bar: #ea580c;
  --warn-soft: #fff4ec;
  --neutral-soft: #f3f4f6;
  --highlight: rgb(94 234 212 / 45%);
  --code-bg: #f6f7f9;
  --font: Inter, system-ui, "Noto Sans", "Segoe UI", Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "DejaVu Sans Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: calc(var(--toolbar-height) + 1rem);
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--viewer);
  color: var(--text);
  font-family: var(--font);
  font-size: 10.5pt;
  line-height: 1.6;
}

/* Werkzeugleiste */

.toolbar {
  position: sticky;
  top: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  height: var(--toolbar-height);
  padding: 0 1rem;
  background-color: var(--toolbar);
  color: var(--toolbar-text);
  font-family: system-ui, "Segoe UI", Roboto, sans-serif;
  font-size: 0.875rem;
  box-shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 2px 6px rgb(0 0 0 / 15%);
}

.toolbar-title {
  margin: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.toolbar-controls {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.toolbar-actions {
  justify-self: end;
}

.toolbar-field {
  padding: 0.25rem;
  border: none;
  border-radius: 2px;
  background-color: rgb(0 0 0 / 50%);
  color: inherit;
  font: inherit;
  text-align: center;
}

.page-input {
  width: 2.5rem;
}

.zoom-label {
  min-width: 3.25rem;
}

.toolbar-divider {
  width: 1px;
  height: 1.25rem;
  margin: 0 0.75rem;
  background-color: rgb(255 255 255 / 20%);
}

.toolbar-button {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: none;
  color: inherit;
  cursor: pointer;
}

.toolbar-button:hover {
  background-color: rgb(255 255 255 / 10%);
}

.toolbar-button:focus-visible,
.page-input:focus-visible {
  outline: 2px solid #8ab4f8;
  outline-offset: 1px;
}

.toolbar-button svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Seiten */

main {
  display: flex;
  flex-direction: column;
  align-items: safe center;
  gap: 1rem;
  padding: 1rem;
  counter-reset: sheet abbildung;
}

.sheet {
  position: relative;
  flex-shrink: 0;
  width: 210mm;
  min-height: 297mm;
  padding: 28mm 18mm 24mm;
  background-color: var(--paper);
  box-shadow: 0 0 4px rgb(0 0 0 / 50%);
  zoom: var(--zoom, 1);
  counter-increment: sheet;
  hyphens: auto;
  print-color-adjust: exact;
}

.sheet > :first-child {
  margin-top: 0;
}

.sheet-header {
  position: absolute;
  top: 12mm;
  right: 18mm;
  left: 18mm;
  display: flex;
  gap: 0.75em;
  color: var(--muted);
  font-size: 8pt;
}

.sheet-header-id {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.sheet:not(.cover)::after {
  content: counter(sheet);
  position: absolute;
  right: 18mm;
  bottom: 12mm;
  color: var(--muted);
  font-size: 8pt;
  font-variant-numeric: tabular-nums;
}

/* Deckblatt */

.cover {
  display: flex;
  flex-direction: column;
  padding: 0;
}

.cover-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 190mm;
  padding: 24mm;
  overflow: hidden;
  background-color: var(--cover);
  background-image: radial-gradient(130mm 130mm at 100% 0, rgb(45 212 191 / 28%), transparent 70%);
}

.cover-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-radial-gradient(circle at 100% 0, transparent 0 13mm, rgb(94 234 212 / 22%) 13mm 13.25mm);
  mask-image: radial-gradient(circle at 100% 0, #000 20%, transparent 70%);
}

.cover-hero::after {
  content: "";
  order: -1;
  width: 14mm;
  height: 1.2mm;
  margin-bottom: 8mm;
  background-color: var(--accent-bright);
}

.title {
  position: relative;
  margin: 0;
  color: #fff;
  font-size: 44pt;
  font-weight: 750;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

.--title-start {
  color: var(--accent-bright);
}

.cover-meta {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 10mm;
  padding: 14mm 24mm;
}

.cover-meta > div {
  padding-top: 3mm;
  border-top: 0.75pt solid var(--ink);
}

.title2-sub,
.title3-sub {
  margin: 0 0 1.5mm;
  color: var(--muted);
  font-size: 7.5pt;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.title2,
.title3 {
  margin: 0;
  color: var(--ink);
  font-size: 12pt;
  font-weight: 600;
  line-height: 1.35;
}

/* Inhalt */

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.2;
}

h1 {
  margin: 0 0 14pt;
  font-size: 26pt;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h1[data-lesson]::before {
  content: attr(data-lesson);
  display: block;
  width: fit-content;
  margin-bottom: 8pt;
  padding: 2pt 7pt;
  border-radius: 999px;
  background-color: var(--accent-soft);
  color: var(--accent);
  font-size: 8.5pt;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

h2 {
  margin: 20pt 0 6pt;
  font-size: 14pt;
  font-weight: 650;
  letter-spacing: -0.01em;
}

h3 {
  margin: 14pt 0 4pt;
  font-size: 11pt;
  font-weight: 600;
}

p,
ul,
ol,
table,
blockquote {
  margin: 0 0 9pt;
}

ul,
ol {
  padding-left: 14pt;
}

li + li {
  margin-top: 2pt;
}

li::marker {
  color: var(--accent);
}

strong {
  color: var(--ink);
  font-weight: 600;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 9.5pt;
}

th,
td {
  padding: 5pt 8pt 5pt 0;
  text-align: left;
  vertical-align: top;
}

th {
  border-bottom: 1pt solid var(--ink);
  color: var(--ink);
  font-weight: 600;
}

td {
  border-bottom: 0.5pt solid var(--line);
}

blockquote {
  padding-left: 12pt;
  border-left: 1.5pt solid var(--line);
  color: var(--muted);
  font-style: italic;
}

blockquote > :last-child {
  margin-bottom: 0;
}

mark {
  padding: 0 1pt;
  background: linear-gradient(transparent 40%, var(--highlight) 40%);
  color: inherit;
  box-decoration-break: clone;
}

b {
  color: var(--accent);
}

:not(pre) > code {
  padding: 0.5pt 3pt;
  border-radius: 3pt;
  background-color: var(--code-bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* Kästen: Merksatz, Beispiel, Achtung, Zusammenfassung */

.merksatz,
.beispiel,
.achtung,
.zusammenfassung {
  position: relative;
  margin: 12pt 0;
  padding: 10pt 14pt;
  border-radius: 4pt;
  break-inside: avoid;
}

:is(.merksatz, .beispiel, .achtung, .zusammenfassung) > :last-child {
  margin-bottom: 0;
}

:is(.beispiel, .achtung, .zusammenfassung)::before {
  content: var(--label);
  display: block;
  margin-bottom: 4pt;
  color: var(--label-color);
  font-size: 7.5pt;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

:is(.beispiel, .achtung, .zusammenfassung)[data-titel]::before {
  content: attr(data-titel);
}

.merksatz {
  border-left: 3pt solid var(--accent);
  border-radius: 0 4pt 4pt 0;
  background-color: var(--accent-soft);
  color: var(--ink);
  font-weight: 500;
}

.beispiel {
  --label: "Beispiel";
  --label-color: var(--muted);
  background-color: var(--neutral-soft);
}

.achtung {
  --label: "Achtung";
  --label-color: var(--warn);
  border-left: 3pt solid var(--warn-bar);
  border-radius: 0 4pt 4pt 0;
  background-color: var(--warn-soft);
  color: var(--ink);
}

.zusammenfassung {
  --label: "Das Wichtigste in Kürze";
  --label-color: var(--accent);
  padding: 12pt 16pt;
  border: 1pt solid var(--accent);
  border-radius: 6pt;
}

/* Prüfungsrelevant */

.pruefung::after {
  content: "Prüfung";
  display: inline-block;
  margin-left: 6pt;
  padding: 1pt 5pt;
  border-radius: 999px;
  background-color: var(--ink);
  color: #fff;
  font-size: 6.5pt;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.5;
  text-transform: uppercase;
  vertical-align: 0.25em;
}

:is(.merksatz, .beispiel, .achtung, .zusammenfassung).pruefung::after {
  position: absolute;
  top: 9pt;
  right: 10pt;
  margin: 0;
}

/* Begriff */

.begriff {
  display: grid;
  grid-template-columns: 40mm 1fr;
  column-gap: 12pt;
  margin: 0;
  padding: 7pt 0;
  border-top: 0.5pt solid var(--line);
  break-inside: avoid;
}

.begriff:not(:has(+ .begriff)) {
  margin-bottom: 9pt;
  border-bottom: 0.5pt solid var(--line);
}

.begriff dfn {
  color: var(--ink);
  font-style: normal;
  font-weight: 600;
}

.begriff > :not(dfn) {
  grid-column: 2;
  margin: 0;
}

.begriff > :not(dfn) + :not(dfn) {
  margin-top: 4pt;
}

/* Offene Frage */

.frage {
  position: relative;
  padding-left: 18pt;
  color: var(--ink);
  font-weight: 500;
}

.frage::before {
  content: "";
  position: absolute;
  top: 0.35em;
  left: 0;
  width: 9pt;
  height: 9pt;
  border: 1pt solid var(--accent);
  border-radius: 2pt;
}

.frage.beantwortet {
  color: var(--muted);
  font-weight: 400;
}

.frage.beantwortet::before {
  background: var(--accent) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.5l2.5 2.5 4.5-5' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 8pt no-repeat;
}

/* Gegenüberstellung */

.vergleich {
  display: grid;
  grid-auto-columns: 1fr;
  grid-auto-flow: column;
  gap: 10pt;
  margin: 12pt 0;
  break-inside: avoid;
}

.vergleich > div {
  padding: 10pt 12pt;
  border: 0.75pt solid var(--line);
  border-radius: 6pt;
}

.vergleich > div > :last-child {
  margin-bottom: 0;
}

.vergleich h4 {
  margin: 0 0 6pt;
  padding-bottom: 5pt;
  border-bottom: 0.75pt solid var(--line);
  color: var(--ink);
  font-size: 10.5pt;
  font-weight: 600;
}

.pro-contra > div:first-child h4 {
  color: var(--accent);
}

.pro-contra > div:last-child h4 {
  color: var(--warn);
}

.pro-contra > div:first-child li::marker {
  content: "+  ";
  color: var(--accent);
  font-weight: 700;
}

.pro-contra > div:last-child li::marker {
  content: "–  ";
  color: var(--warn);
  font-weight: 700;
}

/* Ablauf */

.ablauf {
  margin: 12pt 0;
  padding: 0;
  list-style: none;
  counter-reset: schritt;
  break-inside: avoid;
}

.ablauf > li {
  position: relative;
  margin: 0;
  padding: 0 0 12pt 26pt;
  counter-increment: schritt;
}

.ablauf > li:last-child {
  padding-bottom: 0;
}

.ablauf > li::before {
  content: counter(schritt);
  position: absolute;
  top: 0.5pt;
  left: 0;
  display: grid;
  place-items: center;
  width: 16pt;
  height: 16pt;
  border-radius: 50%;
  background-color: var(--accent);
  color: #fff;
  font-size: 8pt;
  font-weight: 700;
}

.ablauf > li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 19pt;
  bottom: 3pt;
  left: 7.5pt;
  width: 1pt;
  background-color: var(--accent-bright);
}

.ablauf strong {
  display: block;
}

/* Abbildung */

figure {
  margin: 14pt 0;
  counter-increment: abbildung;
  break-inside: avoid;
}

figure img {
  display: block;
  max-width: 100%;
  margin: 0 auto;
}

figcaption {
  margin-top: 6pt;
  color: var(--muted);
  font-size: 9pt;
  text-align: center;
}

figcaption::before {
  content: "Abbildung " counter(abbildung) ": ";
  color: var(--ink);
  font-weight: 600;
}

/* Inhaltsverzeichnis */

.toc-list {
  --toc-number-width: 50pt;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc-entry a {
  display: flex;
  align-items: baseline;
  gap: 8pt;
  color: inherit;
  text-decoration: none;
}

.toc-entry a:hover .toc-text {
  color: var(--accent);
}

.toc-group {
  margin: 20pt 0 2pt;
  color: var(--muted);
  font-size: 7.5pt;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.toc-level-1 {
  margin-top: 6pt;
  padding-top: 6pt;
  border-top: 0.5pt solid var(--line);
  color: var(--ink);
  font-weight: 500;
}

.toc-level-2 {
  margin-top: 2pt;
  padding-left: calc(var(--toc-number-width) + 8pt);
  color: var(--muted);
  font-size: 9.5pt;
}

.toc-number {
  flex-shrink: 0;
  min-width: var(--toc-number-width);
  color: var(--accent);
  font-size: 9pt;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.toc-text {
  flex: 1;
}

.toc-page {
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* Glossar und offene Fragen */

.glossar-buchstabe {
  margin: 14pt 0 4pt;
  color: var(--accent);
  font-size: 13pt;
  font-weight: 700;
}

.glossar .begriff {
  grid-template-columns: 40mm 1fr auto;
}

.glossar .glossar-seite {
  grid-column: 3;
  grid-row: 1;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  transform: translateX(6mm);
}

.glossar dfn a {
  color: inherit;
  text-decoration: none;
}

.leer {
  color: var(--muted);
  font-style: italic;
}

/* Übersicht der Formatierungen */

.vorlage {
  margin-bottom: 16pt;
  break-inside: avoid;
}

.vorlage h2 {
  margin-top: 0;
}

.vorlage-beispiel {
  padding: 10pt 12pt;
  border: 0.75pt solid var(--line);
  border-radius: 6pt 6pt 0 0;
}

.vorlage-beispiel > :first-child {
  margin-top: 0;
}

.vorlage-beispiel > :last-child {
  margin-bottom: 0;
}

.vorlage-code {
  margin: 0;
  padding: 8pt 12pt;
  border: 0.75pt solid var(--line);
  border-top: none;
  border-radius: 0 0 6pt 6pt;
  background-color: var(--code-bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 7pt;
  line-height: 1.45;
  white-space: pre-wrap;
  hyphens: none;
}

@media (max-width: 40rem) {
  .toolbar-title {
    visibility: hidden;
  }

  .toolbar-divider {
    margin: 0 0.25rem;
  }
}

@page {
  size: A4;
  margin: 0;
}

@media print {
  .toolbar {
    display: none;
  }

  body {
    background: none;
  }

  main {
    display: block;
    padding: 0;
  }

  .sheet {
    box-shadow: none;
    zoom: 1;
    break-after: page;
  }

  .sheet:last-child {
    break-after: auto;
  }
}