Improve the mobile view of hackorum - we now have a burger menue, a single column that automatically adjusts the size and the topic list, that looks and fits

Signed-off-by: Kai Wagner <kai.wagner@percona.com>

Author: ImTheKai

app/assets/stylesheets/base/root.css

@@ -79,3 +79,71 @@ body.sidebar-collapsed .page-layout.with-sidebar > main.container {
 .page-layout.with-sidebar > main.container {
   grid-area: main;
 }
+
+.layout-sidebar-overlay {
+  display: none;
+}
+
+@media (max-width: 900px) {
+  .container {
+    padding: 0 var(--spacing-4);
+  }
+
+  .page-layout.with-sidebar {
+    grid-template-columns: minmax(0, 1fr);
+    grid-template-areas: "main";
+  }
+
+  body.sidebar-collapsed .page-layout.with-sidebar {
+    grid-template-columns: minmax(0, 1fr);
+  }
+
+  .page-layout.with-sidebar .layout-sidebar {
+    position: fixed;
+    top: var(--nav-height);
+    left: 0;
+    height: calc(100vh - var(--nav-height));
+    width: min(84vw, 360px);
+    max-width: 360px;
+    transform: translateX(-110%);
+    transition: transform var(--transition-normal);
+    z-index: 200;
+    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
+  }
+
+  body.mobile-sidebar-open .page-layout.with-sidebar .layout-sidebar {
+    transform: translateX(0);
+  }
+
+  body.sidebar-collapsed .page-layout.with-sidebar .layout-sidebar {
+    visibility: visible;
+    pointer-events: auto;
+  }
+
+  .page-layout.with-sidebar .layout-sidebar-resizer {
+    display: none;
+  }
+
+  .layout-sidebar-overlay {
+    display: block;
+    position: fixed;
+    top: var(--nav-height);
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(15, 23, 42, 0.45);
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity var(--transition-normal);
+    z-index: 150;
+  }
+
+  body.mobile-sidebar-open .layout-sidebar-overlay {
+    opacity: 1;
+    pointer-events: auto;
+  }
+
+  body.mobile-sidebar-open {
+    overflow: hidden;
+  }
+}

app/assets/stylesheets/components/navigation.css

@@ -21,6 +21,35 @@
   gap: var(--spacing-4);
 }
 
+.nav-burger {
+  display: none;
+  align-items: center;
+  justify-content: center;
+  width: 44px;
+  height: 44px;
+  border-radius: 999px;
+  border: var(--border-width) solid var(--color-border);
+  background: var(--color-bg-card);
+  cursor: pointer;
+  box-shadow: var(--shadow-sm);
+  gap: 6px;
+  transition: background-color var(--transition-fast), transform var(--transition-fast);
+}
+
+.nav-burger:hover {
+  background: var(--color-bg-hover);
+  transform: scale(1.03);
+}
+
+.nav-burger-bar {
+  width: 18px;
+  height: 2px;
+  background: var(--color-text-secondary);
+  border-radius: 999px;
+  display: block;
+  transition: transform var(--transition-fast), opacity var(--transition-fast);
+}
+
 .nav-brand {
   display: flex;
   align-items: center;
@@ -130,3 +159,94 @@
     background: var(--color-bg-hover);
   }
 }
+
+.mobile-nav-panel,
+.mobile-nav-overlay {
+  display: none;
+}
+
+@media (max-width: 900px) {
+  .nav-container {
+    padding: 0 var(--spacing-4);
+  }
+
+  .tagline {
+    display: none;
+  }
+
+  .nav-links,
+  .nav-right {
+    display: none;
+  }
+
+  .nav-burger {
+    display: inline-flex;
+  }
+
+  body.mobile-sidebar-open .nav-burger-bar:nth-child(1) {
+    transform: translateY(6px) rotate(45deg);
+  }
+
+  body.mobile-sidebar-open .nav-burger-bar:nth-child(2) {
+    opacity: 0;
+  }
+
+  body.mobile-sidebar-open .nav-burger-bar:nth-child(3) {
+    transform: translateY(-6px) rotate(-45deg);
+  }
+
+  .mobile-nav-panel {
+    display: block;
+    position: fixed;
+    top: var(--nav-height);
+    left: 0;
+    width: min(84vw, 360px);
+    height: calc(100vh - var(--nav-height));
+    background: var(--color-bg-card);
+    transform: translateX(-110%);
+    transition: transform var(--transition-normal);
+    z-index: 200;
+    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.18);
+    padding: var(--spacing-4);
+    overflow-y: auto;
+  }
+
+  body.mobile-sidebar-open .mobile-nav-panel {
+    transform: translateX(0);
+  }
+
+  .mobile-nav-panel .mobile-nav-links {
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-3);
+  }
+
+  .mobile-nav-panel .nav-link {
+    width: 100%;
+    justify-content: space-between;
+  }
+
+  .mobile-nav-panel .nav-user {
+    display: block;
+    padding: 0 var(--spacing-2);
+  }
+
+  .mobile-nav-overlay {
+    display: block;
+    position: fixed;
+    top: var(--nav-height);
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(15, 23, 42, 0.45);
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity var(--transition-normal);
+    z-index: 150;
+  }
+
+  body.mobile-sidebar-open .mobile-nav-overlay {
+    opacity: 1;
+    pointer-events: auto;
+  }
+}

app/assets/stylesheets/components/sidebar.css

@@ -45,6 +45,16 @@
   }
 }
 
+@media (max-width: 900px) {
+  .sidebar {
+    position: static;
+    top: auto;
+    max-height: none;
+    height: 100%;
+    padding-right: 0;
+  }
+}
+
 .sidebar-section {
   margin-bottom: var(--spacing-8);
 }
@@ -268,3 +278,29 @@
 .sidebar .commitfest-committers li + li {
   margin-top: var(--spacing-1);
 }
+
+.mobile-sidebar-nav {
+  display: none;
+}
+
+@media (max-width: 900px) {
+  .mobile-sidebar-nav {
+    display: block;
+  }
+
+  .mobile-sidebar-nav .mobile-nav-links {
+    display: flex;
+    flex-direction: column;
+    gap: var(--spacing-3);
+  }
+
+  .mobile-sidebar-nav .nav-link {
+    width: 100%;
+    justify-content: space-between;
+  }
+
+  .mobile-sidebar-nav .nav-user {
+    display: block;
+    padding: 0 var(--spacing-2);
+  }
+}

app/assets/stylesheets/components/topics.css

@@ -202,6 +202,120 @@ a.topic-icon {
   }
 }
 
+@media (max-width: 900px) {
+  .topics-table {
+    & table {
+      display: block;
+    }
+
+    & thead {
+      display: none;
+    }
+
+    & tbody {
+      display: block;
+    }
+
+    & tr {
+      display: grid;
+      gap: var(--spacing-2);
+      padding: var(--spacing-3);
+      border: var(--border-width) solid var(--color-border);
+      border-radius: var(--border-radius-lg);
+      background: var(--color-bg-card);
+      margin-bottom: var(--spacing-3);
+    }
+
+    & td {
+      display: flex;
+      flex-direction: column;
+      gap: var(--spacing-1);
+      padding: 0;
+      border-bottom: none;
+    }
+
+    & td::before {
+      content: attr(data-label);
+      font-size: var(--font-size-xs);
+      text-transform: uppercase;
+      letter-spacing: 0.04em;
+      color: var(--color-text-muted);
+    }
+
+    & td.topic-title::before {
+      display: none;
+    }
+
+    & td.topic-activity::before {
+      display: none;
+    }
+
+    & td.topic-participants {
+      display: none;
+    }
+
+    & .topic-participants {
+      text-align: left;
+    }
+
+    & .topic-replies,
+    & .topic-activity,
+    & .topic-participants {
+      width: auto;
+    }
+  }
+
+  .topic-row {
+    align-items: center;
+  }
+
+  .topics-table td.topic-title {
+    display: flex;
+    flex-direction: row;
+    align-items: center;
+    gap: var(--spacing-2);
+  }
+
+  .topic-icon {
+    padding: 2px;
+    margin-right: 0;
+  }
+
+  .topic-icon-badge {
+    min-width: 16px;
+    height: 16px;
+    font-size: 10px;
+  }
+
+  .topic-link {
+    font-size: var(--font-size-base);
+    line-height: var(--line-height-normal);
+    flex: 1 1 auto;
+    min-width: 0;
+  }
+
+  .topics-table td.topic-activity {
+    align-items: flex-end;
+  }
+
+  .activity-info {
+    flex-direction: row;
+    justify-content: space-between;
+    text-align: left;
+    gap: var(--spacing-2);
+    width: 100%;
+  }
+
+  .activity-replies,
+  .activity-time {
+    font-size: var(--font-size-2xs);
+  }
+
+  .activity-time {
+    text-align: right;
+  }
+}
+
 .activity-star {
   background-color: var(--color-bg-activity-team);
   .topic-icon-badge {