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diff --git a/extension.ini b/extension.ini
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+# Datenstrom Yellow extension settings
+
+Extension: LBS
+Version: 0.9.0
+Description: LBS ist das offizielle louis-bar-syndrom.info Theme.
+Developer: Simon Pipe
+Tag: theme
+Download: https://git.thepipes.ch/simon/yellow-lbs/archive/main.zip
+Documentation: https://git.thepipes.ch/simon/yellow-lbs
+DocumentationLanguage: de
+Published: 2026-09-28 14:50:00
+Status: available
+system/workers/lbs.php: lbs.php, create, update
+system/themes/lbs.css: lbs.css, create, update, careful
+system/themes/lbs.png: lbs.png, create, careful
+system/themes/lbs-opensans-bold.woff: aarau-opensans-bold.woff, create
+system/themes/lbs-opensans-light.woff: aarau-opensans-light.woff, create, update
+system/themes/lbs-opensans-regular.woff: aarau-opensans-regular.woff, create
+system/themes/lbs-lora-bold.woff: lbs-lora-bold.woff, create, update
+system/themes/lbs-lora-regular.woff: lbs-lora-regular.woff, create, update
+media/site/apple-touch-icon.png: apple-touch-icon.png, create, update, careful
+media/site/favicon.png: favicon.png, create, update, careful
+media/site/lbs-share.png: lbs-share.png, create, update, careful
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diff --git a/lbs.css b/lbs.css
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+++ b/lbs.css
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+/*
+ * louis-bar-syndrom.info
+ * Theme: Warm Editorial
+ *
+ * Designed as a visual replacement/override for the Yellow-CMS Stockholm theme.
+ * Existing navigation, content and URLs are intentionally left untouched.
+ *
+ * The stylesheet works with the existing Yellow-CMS classes, including:
+ * .page, .header, .navigation, .content, .footer, .important,
+ * .left, .center, .right, .rounded, .form-control and .btn.
+ */
+
+:root {
+    /* Warm, calm palette */
+    --bg: #fbfaf6;
+    --surface: #ffffff;
+    --surface-soft: #f1f5f2;
+    --important-bg: #edf5f4;
+    --heading: #234b50;
+    --text: #334347;
+    --muted: #667477;
+    --code: #566366;
+    --code-bg: #f1f3f2;
+    --entry: #667477;
+
+    /* Accessible teal accent */
+    --link: #176f78;
+    --link-active: #1f7f88;
+    --accent: #2f7f82;
+    --accent-soft: #dceceb;
+
+    --blockquote-accent: #6e9b94;
+    --important-accent: #2f7f82;
+    --separator: #d9e1de;
+    --border: #c5d0cd;
+
+    --shadow-soft: 0 8px 30px rgba(35, 75, 80, 0.07);
+    --radius: 14px;
+    --radius-image: 22px;
+
+    --font: "Open Sans", Helvetica, Arial, sans-serif;
+    --heading-font: "Lora", Georgia, serif;
+    --monospace-font: Consolas, Menlo, Courier, monospace;
+}
+
+@font-face {
+    font-family: "Open Sans";
+    font-style: normal;
+    font-weight: 300;
+    font-display: swap;
+    src: url(lbs-opensans-light.woff) format("woff");
+}
+
+@font-face {
+    font-family: "Open Sans";
+    font-style: normal;
+    font-weight: 400;
+    font-display: swap;
+    src: url(lbs-opensans-regular.woff) format("woff");
+}
+
+@font-face {
+    font-family: "Open Sans";
+    font-style: normal;
+    font-weight: 700;
+    font-display: swap;
+    src: url(lbs-opensans-bold.woff) format("woff");
+}
+
+@font-face {
+    font-family: "Lora";
+    font-style: normal;
+    font-weight: 400;
+    font-display: swap;
+    src: url(lbs-lora-regular.woff) format("woff");
+}
+
+@font-face {
+    font-family: "Lora";
+    font-style: normal;
+    font-weight: 700;
+    font-display: swap;
+    src: url(lbs-lora-bold.woff) format("woff");
+}
+
+/* ---------- Reset / base ---------- */
+
+html,
+body,
+div,
+form,
+pre,
+span,
+tr,
+th,
+td,
+img {
+    margin: 0;
+    padding: 0;
+    border: 0;
+    vertical-align: baseline;
+}
+
+html {
+    min-height: 100%;
+    background: var(--bg);
+}
+
+body {
+    position: relative;
+    min-height: 100vh;
+    margin: 0;
+    background:
+        radial-gradient(900px 520px at 4% 8%, rgba(220, 236, 235, 0.62), transparent 68%),
+        radial-gradient(760px 460px at 96% 22%, rgba(241, 226, 207, 0.58), transparent 66%),
+        radial-gradient(900px 560px at 70% 100%, rgba(226, 237, 231, 0.42), transparent 70%),
+        var(--bg);
+    color: var(--text);
+    font-family: var(--font);
+    font-size: 1rem;
+    font-weight: 400;
+    line-height: 1.68;
+    -webkit-font-smoothing: antialiased;
+    text-rendering: optimizeLegibility;
+}
+
+/* Very subtle organic background shapes.
+ * They sit behind the page content and keep the large white areas
+ * from feeling empty without becoming a decorative wallpaper.
+ */
+body::before,
+body::after {
+    content: "";
+    position: fixed;
+    z-index: 0;
+    pointer-events: none;
+    border-radius: 50%;
+    filter: blur(2px);
+}
+
+body::before {
+    width: 34rem;
+    height: 34rem;
+    top: -19rem;
+    left: -15rem;
+    background: rgba(220, 236, 235, 0.34);
+}
+
+body::after {
+    width: 30rem;
+    height: 30rem;
+    right: -14rem;
+    bottom: -16rem;
+    background: rgba(241, 226, 207, 0.30);
+}
+
+.page {
+    position: relative;
+    z-index: 1;
+    width: min(1120px, calc(100% - 48px));
+    margin: 0 auto;
+}
+
+/* ---------- Typography ---------- */
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+    color: var(--heading);
+    font-family: var(--heading-font);
+    font-weight: 400;
+    line-height: 1.2;
+    letter-spacing: -0.015em;
+}
+
+h1 {
+    font-size: clamp(2.15rem, 4vw, 3.35rem);
+    letter-spacing: -0.025em;
+}
+
+h2 {
+    margin-top: 2.25em;
+    font-size: clamp(1.65rem, 3vw, 2.25rem);
+}
+
+h3 {
+    margin-top: 1.8em;
+    font-size: 1.45rem;
+}
+
+strong {
+    font-weight: 700;
+    color: #263b3e;
+}
+
+a {
+    color: var(--link);
+    text-decoration-thickness: 1px;
+    text-underline-offset: 0.14em;
+    transition: color 150ms ease, text-decoration-color 150ms ease;
+}
+
+a:hover,
+a:focus {
+    color: var(--link-active);
+}
+
+a:focus-visible,
+button:focus-visible,
+input:focus-visible,
+textarea:focus-visible {
+    outline: 3px solid rgba(31, 127, 136, 0.3);
+    outline-offset: 3px;
+}
+
+/* ---------- Header ---------- */
+
+.header {
+    margin: 0;
+    padding: 30px 0 24px;
+    border-bottom: 1px solid var(--separator);
+}
+
+.header::after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+.header .sitename {
+    display: block;
+    float: left;
+}
+
+.header .sitename h1 {
+    margin: 0;
+    font-family: var(--font);
+    font-size: 1.05rem;
+    font-weight: 700;
+    line-height: 1.4;
+    letter-spacing: 0.045em;
+}
+
+.header .sitename h1 a {
+    color: var(--heading);
+    padding: 0;
+    border: 0;
+    text-decoration: none;
+}
+
+.header .sitename h1 a:hover {
+    color: var(--link-active);
+}
+
+.header .sitename p {
+    margin: 0;
+    color: var(--muted);
+}
+
+/* ---------- Site logo ---------- */
+
+.sitename-logo {
+    display: inline-block;
+    width: 33px;
+    height: 33px;
+    margin-right: 0.55rem;
+    vertical-align: -10px;
+
+    background-image: url("lbs.png");
+    background-repeat: no-repeat;
+    background-position: center;
+    background-size: contain;
+}
+
+/* ---------- Navigation ---------- */
+
+.navigation {
+    display: block;
+    float: right;
+}
+
+.navigation ul {
+    display: flex;
+    align-items: center;
+    gap: 0.35rem;
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+.navigation li {
+    display: block;
+}
+
+.navigation a {
+    display: block;
+    position: relative;
+    padding: 0.25rem 0.55rem 0.55rem;
+    margin: 0;
+    color: var(--text);
+    border: 0;
+    text-decoration: none;
+    line-height: 1.4;
+}
+
+.navigation a::after {
+    content: "";
+    position: absolute;
+    left: 0.55rem;
+    right: 0.55rem;
+    bottom: 0;
+    height: 2px;
+    background: var(--accent);
+    transform: scaleX(0);
+    transform-origin: center;
+    transition: transform 150ms ease;
+}
+
+.navigation a:hover,
+.navigation a:focus {
+    color: var(--heading);
+}
+
+.navigation a:hover::after,
+.navigation a:focus::after,
+.navigation li a.active::after {
+    transform: scaleX(1);
+}
+
+.navigation li a.active {
+    color: var(--heading);
+    border: 0;
+}
+
+/* ---------- Main content ---------- */
+
+.content {
+    padding: 20px 0 70px;
+}
+
+.content h1 {
+    margin: 0 0 1.15em;
+}
+
+.content h1 a {
+    color: var(--heading);
+}
+
+.content h1 a:hover {
+    color: var(--heading);
+    text-decoration: none;
+}
+
+.content p {
+    max-width: none;
+    margin: 0 0 1.15em;
+}
+
+.content ul,
+.content ol {
+    margin-top: 0.6em;
+    margin-bottom: 1.5em;
+}
+
+.content li + li {
+    margin-top: 0.18em;
+}
+
+.content img {
+    max-width: 100%;
+    height: auto;
+}
+
+/* Existing image positioning from Yellow-CMS */
+.content .left,
+.content .right {
+    max-width: 44%;
+    margin-bottom: 1.5rem;
+}
+
+.content .left {
+    margin-right: 2.5rem;
+}
+
+.content .right {
+    margin-left: 2.5rem;
+}
+
+/* Make the existing decorative page images feel intentional */
+.content img.rounded,
+.content .rounded img,
+.content .right.rounded,
+.content .left.rounded {
+    border-radius: var(--radius-image);
+}
+
+.content .right img,
+.content .left img {
+    border-radius: var(--radius-image);
+}
+
+/* A subtle organic frame without forcing a new HTML structure */
+.content .right img {
+    box-shadow: var(--shadow-soft);
+}
+
+/* ---------- Tables / code ---------- */
+
+.content table {
+    width: 100%;
+    border-spacing: 0;
+    border-collapse: collapse;
+    margin: 1.5rem 0;
+}
+
+.content th,
+.content td {
+    padding: 0.65rem 0.8rem;
+    text-align: left;
+    border-bottom: 1px solid var(--separator);
+}
+
+.content th {
+    color: var(--heading);
+    font-weight: 700;
+}
+
+.content code,
+.content pre {
+    font-family: var(--monospace-font);
+}
+
+.content code {
+    padding: 0.15em 0.4em;
+    background: #eef1ef;
+    color: var(--code);
+    border-radius: 5px;
+}
+
+.content pre {
+    padding: 1rem 1.2rem;
+    overflow: auto;
+    line-height: 1.5;
+    background: #f1f3f1;
+    color: var(--code);
+    border: 1px solid var(--separator);
+    border-radius: var(--radius);
+}
+
+.content pre > code {
+    padding: 0;
+    background: transparent;
+    border: 0;
+}
+
+/* ---------- Quotes / information boxes ---------- */
+
+.content blockquote {
+    margin: 2rem 0;
+    padding: 0.25rem 0 0.25rem 1.25rem;
+    color: var(--heading);
+    font-weight: 600;
+    border-left: 4px solid var(--blockquote-accent);
+}
+
+.content .important {
+    margin: 2rem 0;
+    padding: 1.15rem 1.4rem;
+    background: var(--important-bg);
+    border: 0;
+    border-left: 4px solid var(--important-accent);
+    border-radius: 0 var(--radius) var(--radius) 0;
+    box-shadow: none;
+}
+
+.content .important strong {
+    color: var(--heading);
+}
+
+/* ---------- Lists used by the wiki / Beiträge ---------- */
+
+.content .toc,
+.content .wikipages ul,
+.content .wikitags ul,
+.content .wikilinks ul {
+    padding: 0;
+    list-style: none;
+}
+
+.content .wikipages ul,
+.content .wikitags ul,
+.content .wikilinks ul {
+    column-width: 30em;
+    column-gap: 3rem;
+}
+
+.content .wikipages li,
+.content .wikitags li,
+.content .wikilinks li {
+    break-inside: avoid;
+    margin-bottom: 0.65rem;
+}
+
+.content .pagination,
+.content .previousnext {
+    margin: 2.5rem 0 0;
+    padding-top: 1.25rem;
+    border-top: 1px solid var(--separator);
+}
+
+/* ---------- Forms ---------- */
+
+.content form {
+    margin: 1.5rem 0;
+}
+
+.form-control {
+    box-sizing: border-box;
+    min-width: 7em;
+    padding: 0.65rem 0.8rem;
+    background: var(--surface);
+    color: var(--text);
+    border: 1px solid var(--border);
+    border-radius: 9px;
+    font: inherit;
+    line-height: 1.4;
+    box-shadow: 0 1px 2px rgba(35, 75, 80, 0.03);
+}
+
+.form-control:focus {
+    border-color: var(--accent);
+}
+
+textarea.form-control {
+    min-height: 10rem;
+    resize: vertical;
+}
+
+.btn {
+    box-sizing: border-box;
+    min-width: 7em;
+    padding: 0.65rem 1.2rem;
+    background: var(--accent);
+    color: #fff;
+    border: 1px solid var(--accent);
+    border-radius: 999px;
+    font: inherit;
+    font-weight: 700;
+    line-height: 1.35;
+    text-align: center;
+    text-decoration: none;
+    cursor: pointer;
+    transition: transform 150ms ease, background-color 150ms ease;
+}
+
+.btn:hover,
+.btn:focus,
+.btn:active {
+    color: #fff;
+    background: var(--link-active);
+    border-color: var(--link-active);
+    text-decoration: none;
+}
+
+.btn:hover {
+    transform: translateY(-1px);
+}
+
+.btn:active {
+    transform: translateY(0);
+}
+
+/* ---------- Footer ---------- */
+
+.footer {
+    margin: 0;
+    padding: 24px 0 38px;
+    color: var(--muted);
+    border-top: 1px solid var(--separator);
+    text-align: right;
+    font-size: 0.88rem;
+    background: transparent;
+    position: relative;
+}
+
+.footer::before {
+    content: "";
+    position: absolute;
+    left: 50%;
+    width: 100vw;
+    top: 0;
+    bottom: 0;
+    transform: translateX(-50%);
+    background: rgba(251, 250, 246, 0.35);
+    z-index: -1;
+}
+
+.footer .siteinfo a {
+    color: var(--entry);
+}
+
+.footer .siteinfo a:hover {
+    color: var(--entry);
+}
+
+/* ---------- Embedded content ---------- */
+
+.content .flexible {
+    position: relative;
+    padding-top: 0;
+    padding-bottom: 56.25%;
+}
+
+.content .flexible iframe {
+    position: absolute;
+    inset: 0;
+    width: 100%;
+    height: 100%;
+}
+
+/* ---------- Responsive: tablet ---------- */
+
+@media screen and (max-width: 62em) {
+    .page {
+        width: min(100% - 36px, 900px);
+    }
+
+    .header {
+        padding-top: 24px;
+    }
+
+    .content {
+        padding-top: 18px;
+    }
+
+    .content .left,
+    .content .right {
+        max-width: 40%;
+    }
+}
+
+/* ---------- Responsive: phone ---------- */
+
+@media screen and (max-width: 44em) {
+    body {
+        font-size: 1rem;
+        line-height: 1.65;
+    }
+
+    .page {
+        width: calc(100% - 28px);
+    }
+
+    .header {
+        padding: 18px 0 16px;
+    }
+
+    .header .sitename {
+        float: none;
+    }
+
+    .header .sitename h1 {
+        font-size: 1rem;
+    }
+
+    /*
+     * The existing navigation becomes a clean, wrapping row.
+     * This avoids tiny desktop navigation on phones.
+     */
+    .navigation {
+        float: none;
+        margin-top: 0.8rem;
+    }
+
+    .navigation ul {
+        flex-wrap: wrap;
+        gap: 0.1rem 0.15rem;
+    }
+
+    .navigation a {
+        padding: 0.3rem 0.42rem 0.45rem;
+        font-size: 0.92rem;
+    }
+
+    .navigation a::after {
+        left: 0.42rem;
+        right: 0.42rem;
+    }
+
+    .content {
+        padding: 16px 0 48px;
+    }
+
+    .content h1 {
+        margin-bottom: 1rem;
+        font-size: 2.15rem;
+    }
+
+    .content h2 {
+        margin-top: 2rem;
+        font-size: 1.7rem;
+    }
+
+    .content h3 {
+        font-size: 1.3rem;
+    }
+
+    /*
+     * Decorative page images stack above/below the text instead of
+     * leaving a narrow text column beside them.
+     */
+    .content .left,
+    .content .right {
+        float: none;
+        display: block;
+        width: 100%;
+        max-width: 100%;
+        margin: 0 0 1.5rem;
+    }
+
+    .content .right img,
+    .content .left img {
+        display: block;
+        width: 100%;
+        max-height: 320px;
+        object-fit: cover;
+        border-radius: 18px;
+    }
+
+    .content .important {
+        margin: 1.5rem 0;
+        padding: 1rem 1.05rem;
+    }
+
+    .content .wikipages ul,
+    .content .wikitags ul,
+    .content .wikilinks ul {
+        column-count: 1;
+        column-width: auto;
+    }
+
+    .content table {
+        display: block;
+        overflow-x: auto;
+        -webkit-overflow-scrolling: touch;
+    }
+
+    .form-control {
+        width: 100%;
+        max-width: 100%;
+    }
+
+    .btn {
+        width: auto;
+        min-height: 44px;
+        padding-inline: 1.25rem;
+    }
+
+    .footer {
+        padding-bottom: 28px;
+    }
+}
+
+/* ---------- Very small phones ---------- */
+
+@media screen and (max-width: 24em) {
+    .page {
+        width: calc(100% - 22px);
+    }
+
+    .navigation a {
+        font-size: 0.86rem;
+    }
+
+    .content h1 {
+        font-size: 1.95rem;
+    }
+}
+
+/* ---------- Reduced motion ---------- */
+
+@media (prefers-reduced-motion: reduce) {
+    *,
+    *::before,
+    *::after {
+        scroll-behavior: auto !important;
+        transition: none !important;
+    }
+}
+
+/* ---------- Print ---------- */
+
+@media print {
+    html,
+    body {
+        background: #fff;
+    }
+
+    .page {
+        width: auto;
+        max-width: none;
+    }
+
+    .header {
+        border-bottom: 0;
+    }
+
+    .footer {
+        border-top: 1px solid #ccc;
+    }
+}
+
+
+/* ---------- LBS Hero images from Markdown ---------- */
+
+.main h1 + p img,
+.entry-title + .entry-content > p:first-child img {
+    float: right;
+    width: 500px;
+    max-width: 50%;
+    height: auto;
+    margin: 0.2rem 0 2rem 3.5rem;
+    border-radius: var(--radius-image);
+    filter: drop-shadow(0 12px 24px rgba(35, 75, 80, 0.08));
+}
+
+.content .main::after {
+    content: "";
+    display: table;
+    clear: both;
+}
+
+/* ---------- Wiki article images centered ---------- */
+
+.entry-content p img {
+    float: none;
+    display: block;
+    width: auto;
+    max-width: 100%;
+    height: auto;
+    margin: 1.5rem auto 2rem;
+}
+
+/* Mobile */
+@media screen and (max-width: 44em) {
+
+    .content .main > p:first-of-type img,
+    .content .main > img:first-of-type {
+        float: none;
+        display: block;
+        width: min(100%, 360px);
+        max-width: 100%;
+        margin: 0 auto 2rem;
+    }
+
+}
+
+
+/* ---------- Migrated from lbs-erweiterung.css ---------- */
+
+/* Desktop sitename refinement */
+@media screen and (min-width: 48.01em) {
+    .header .sitename h1 a {
+        letter-spacing: 2px;
+        font-weight: 500;
+        padding-left: 0;
+        border-bottom: none;
+    }
+}
+
+/* Entry metadata */
+.entry-meta {
+    color: var(--entry);
+    font-style: italic;
+}
+
+/* Blockquotes */
+.content blockquote {
+    font-weight: normal;
+}
+
+/* Wiki lists */
+.content .wikipages ul li,
+.content .wikitags ul li,
+.content .wikilinks ul li {
+    break-inside: avoid-column;
+    display: inline-block;
+    width: 100%;
+    margin-bottom: 0.2em;
+}
+
+/* General content images */
+.content img {
+    max-width: 100%;
+    height: auto;
+    display: block;
+    border-radius: var(--radius-image);
+}
+
+/* Automatic image captions */
+.content p:has(img) {
+    font-style: italic;
+    font-size: 0.9em;
+    color: var(--muted);
+    text-align: center;
+    line-height: 1.3;
+    margin-top: 1.5em;
+    margin-bottom: 1.5em;
+}
+
+.content p:has(img) img {
+    font-style: normal;
+}
+
+
+/* Mobile navigation refinement */
+@media screen and (max-width: 48em) {
+
+    .header .sitename {
+        float: none;
+        width: 100%;
+        text-align: center;
+    }
+
+    .navigation {
+        float: none;
+        width: 100%;
+        text-align: center;
+    }
+
+    .navigation li {
+        display: inline-block;
+    }
+
+}
diff --git a/lbs.php b/lbs.php
new file mode 100644
index 0000000..4ec1398
--- /dev/null
+++ b/lbs.php
@@ -0,0 +1,22 @@
+<?php
+// LBS extension, https://git.thepipes.ch/simon/yellow-lbs
+
+class YellowLBS {
+    const VERSION = "0.9.0";
+    public $yellow;         // access to API
+    
+    // Handle initialisation
+    public function onLoad($yellow) {
+        $this->yellow = $yellow;
+    }
+    
+    // Handle update
+    public function onUpdate($action) {
+        $fileName = $this->yellow->system->get("coreExtensionDirectory").$this->yellow->system->get("coreSystemFile");
+        if ($action=="install") {
+            $this->yellow->system->save($fileName, array("theme" => "lb"));
+        } elseif ($action=="uninstall" && $this->yellow->system->get("theme")=="lbs") {
+            $this->yellow->system->save($fileName, array("theme" => $this->yellow->system->getDifferent("theme")));
+        }
+    }
+}
diff --git a/lbs.png b/lbs.png
new file mode 100644
index 0000000..69c382d
Binary files /dev/null and b/lbs.png differ