diff --git a/web/13/labor/13_aufgaben.md b/web/13/labor/13_aufgaben.md
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+# Übungsblatt 13
+
+*Für das gesamte Übungsblatt ist keine Abgabe erforderlich.*
+
+## 1. Übung zu Responsive Design: Media Queries
+
+**Frage:** Welche *Media Query* trifft auf welches Gerät zu?
+
+a. Smartphone: 320 x 480px
+
+
+
+b. Smartphone quer gehalten: 960 x 640px
+
+
+
+c. PC-Bildschirm: 1600 x 900px mit Browserfenster: 800 x 500px
+
+
+
+d. Tablet quer gehalten: 2048 x 1539px
+
+
+
+1.
+```css
+@media screen
+```
+
+2.
+```css
+@media screen and (max-width: 800px)
+```
+
+3.
+```css
+@media screen and (orientation: portrait)
+```
+
+4.
+```css
+@media screen and (min-device-width: 900px)
+```
+
+5.
+```css
+@media screen and (min-width: 900px)
+```
+
+6.
+```css
+@media print and (min-width: 30cm)
+```
+
+7.
+```css
+@media screen and (max-device-height: 1400px)
+```
+
+## 2. Übung zu Barrierefreiheit
+
+
+**Aufgabenstellung**: Gegen welche WCAG-Erfolgskriterien verstößt folgendes Web-Kontaktformular?
+
+
+
diff --git a/web/13/labor/demos/01_Lieblingsbuecher.html b/web/13/labor/demos/01_Lieblingsbuecher.html
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+
+
+
+
+
+
+ Meine Lieblingsbücher
+
+
+
+
+
+

+
+
+
+
+
+
Lieblingsbücher
+
+
+
+
Monster
+
+ Nele Neuhaus
+
+ ca. 560
+
+
+
+
+
+
+
+
+
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diff --git a/web/13/labor/demos/01_styles_Lieblingsbuecher.css b/web/13/labor/demos/01_styles_Lieblingsbuecher.css
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+body {
+ margin: 0;
+ padding: 0;
+}
+
+#logo-container {
+ background-color: cadetblue;
+ width: 10%;
+ height: 10%;
+ position: absolute;
+ top: 0%;
+ left: 0%;
+
+ display: flex;
+ align-items: center;
+ justify-content: center;
+}
+
+#logo-container img {
+ display: block;
+ height: 100%;
+ margin: auto;
+}
+
+#navbar-container {
+ background-color: rgb(155, 207, 209);
+ width: 90%;
+ height: 10%;
+ position: absolute;
+ top: 0%;
+ left: 10%;
+}
+
+#navbar-container a,
+#navbar-container a:visited {
+ float: left;
+ width: 20%;
+ height: 100%;
+
+ display: flex;
+ justify-content: center;
+ align-items: center;
+
+ text-decoration: none;
+ color: rgb(4, 60, 116);
+}
+
+#navbar-container a:hover {
+ background-color: rgb(225, 236, 236);
+}
+
+.content-container {
+ background-color: rgb(229, 228, 222);
+ width: 100%;
+ height: 90%;
+ position: absolute;
+ top: 10%;
+ left: 0%;
+ text-align: center;
+}
+
+.buch-element {
+ float: left;
+ background-color: rgb(210, 194, 168);
+ height: 150px;
+ width: 18%;
+ padding: 1.5em 0;
+ margin: 10px 1% 10px 1%;
+}
+
+@media screen and (max-width: 700px) {
+
+ #logo-container img {
+ max-width: 100%;
+ height: auto;
+ }
+
+ #navbar-container a,
+ #navbar-container a:visited {
+ font-size: 0.7em;
+ }
+
+ .buch-element {
+ float: none;
+ width: 98%;
+ position: static;
+ font-size: 0.9em;
+ }
+}
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diff --git a/web/13/labor/demos/02_ellipsis.html b/web/13/labor/demos/02_ellipsis.html
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+
+
+
+
+
+
+ Beispielseite
+
+
+
+
+ Dies ist ein sehr langer Text, der abgeschnitten wird.
+
+
+
+
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diff --git a/web/13/labor/demos/02_styles_ellipsis.css b/web/13/labor/demos/02_styles_ellipsis.css
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+.ellipsis {
+ width: 160px;
+ white-space: nowrap;
+ overflow: hidden;
+ text-overflow: ellipsis;
+ border: 1px solid #999;
+}
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diff --git a/web/13/labor/demos/03_namedtags_screenreader.html b/web/13/labor/demos/03_namedtags_screenreader.html
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+
+
+
+
+
+ Named Tags: Beispielseite
+
+
+
+
+
+ Willkommen auf unserer barrierefreien Seite mit Named Tags
+
+ Unsere Angebote
+ Hier findest du eine Übersicht unserer Dienstleistungen.
+
+
+
+
+
+
+
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diff --git a/web/13/labor/demos/04_aria.html b/web/13/labor/demos/04_aria.html
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+
+
+
+
+
+
+ Beispielseite
+
+
+
+
+
+
+ Ohne ARIA absenden
+
+
+
+
+ Mit ARIA absenden
+
+
+
+
+
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diff --git a/web/13/labor/demos/04_styles_aria.css b/web/13/labor/demos/04_styles_aria.css
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+.custom-button {
+ float: left;
+ background-color: #0078D4;
+ color: white;
+ padding: 0.6em 1.2em;
+ font-size: 1rem;
+ border-radius: 6px;
+ cursor: pointer;
+ margin: 0px 5px;
+}
+
+.custom-button:hover,
+.custom-button:focus {
+ background-color: #005A9E;
+ outline: 2px solid #005A9E;
+ outline-offset: 2px;
+}
+
+.custom-button:active {
+ background-color: #004578;
+}
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diff --git a/web/13/labor/demos/05_styles_voiceover.css b/web/13/labor/demos/05_styles_voiceover.css
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+body {
+ font-family: Arial, sans-serif;
+ line-height: 1.6;
+ padding: 2rem;
+}
+
+header,
+nav,
+main,
+footer {
+ margin-bottom: 2rem;
+}
+
+nav a {
+ margin-right: 1rem;
+ text-decoration: underline;
+ color: #0055aa;
+}
+
+button {
+ padding: 0.5rem 1rem;
+ font-size: 1rem;
+ background-color: #0055aa;
+ color: white;
+ border: none;
+ border-radius: 4px;
+}
+
+button:focus {
+ outline: 3px solid #ffaa00;
+}
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diff --git a/web/13/labor/demos/05_voiceover.html b/web/13/labor/demos/05_voiceover.html
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+
+
+
+
+
+
+
+ Screen Reader Demo
+
+
+
+
+
+
+
+
+
+ Demo starten
+ Drücken Sie den folgenden Button, um eine Beispielaktion auszuführen:
+
+
+
+
+ Tipps zur Bedienung
+
+ - VoiceOver aktivieren: Einstellungen → Bedienungshilfen → VoiceOver
+ - Navigation mit Wischgesten oder Tastatur
+ - Elemente werden vorgelesen, wenn sie fokussiert sind
+
+
+
+
+ Beispielbild mit barrierefreiem Alternativtext
+
+
+
+ Schlafende Katze auf einem gemütlichen Bett.
+
+
+
+
+
+
+
+
+
+
+
+
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