WIP on master

wwwroot/css/README.md

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+# CSS Build Process
+
+Dette projekt bruger PostCSS til at kompilere moderne nested CSS til browser-kompatibel CSS.
+
+## Mappestruktur
+
+```
+wwwroot/css/
+├── src/                          # Source CSS filer med nesting
+│   ├── calendar-base-css.css
+│   ├── calendar-layout-css.css
+│   └── ...
+├── calendar-base-css.css         # Compiled CSS (genereret automatisk)
+├── calendar-layout-css.css       # Compiled CSS (genereret automatisk)
+└── ...
+```
+
+## Workflow
+
+### Development
+
+1. **Rediger CSS i `src/` mappen**
+   - Brug moderne CSS nesting
+   - Skriv nested selectors med `&`
+   - Brug CSS custom properties
+
+2. **Build CSS**
+   ```bash
+   npm run css:build
+   ```
+
+3. **Watch mode (auto-rebuild)**
+   ```bash
+   npm run css:watch
+   ```
+
+### Production
+
+```bash
+npm run css:build:prod
+```
+
+Dette vil:
+- Kompilere nested CSS
+- Tilføje vendor prefixes (autoprefixer)
+- Minificere CSS (cssnano)
+- Fjerne comments
+
+## CSS Nesting Eksempel
+
+### Source (src/calendar-layout-css.css)
+
+```css
+swp-allday-container {
+  display: grid;
+  
+  swp-allday-event {
+    height: 22px;
+    padding: 2px 4px;
+    
+    &[data-type="meeting"] {
+      background: var(--color-event-meeting);
+      
+      &.highlight {
+        background: var(--color-event-meeting-hl);
+      }
+    }
+    
+    &:hover {
+      opacity: 0.9;
+    }
+    
+    swp-event-title {
+      font-size: 12px;
+    }
+  }
+}
+```
+
+### Compiled (calendar-layout-css.css)
+
+```css
+swp-allday-container {
+  display: grid;
+}
+
+swp-allday-container swp-allday-event {
+  height: 22px;
+  padding: 2px 4px;
+}
+
+swp-allday-container swp-allday-event[data-type="meeting"] {
+  background: var(--color-event-meeting);
+}
+
+swp-allday-container swp-allday-event[data-type="meeting"].highlight {
+  background: var(--color-event-meeting-hl);
+}
+
+swp-allday-container swp-allday-event:hover {
+  opacity: 0.9;
+}
+
+swp-allday-container swp-allday-event swp-event-title {
+  font-size: 12px;
+}
+```
+
+## Fordele ved CSS Nesting
+
+1. **Mindre gentagelse** - Ingen behov for at gentage parent selectors
+2. **Bedre læsbarhed** - Strukturen matcher DOM hierarkiet
+3. **Lettere vedligeholdelse** - Relaterede styles er grupperet
+4. **Mindre CSS** - Færre bytes i source filer
+5. **Bedre organisation** - Logisk gruppering af styles
+
+## PostCSS Plugins
+
+- **postcss-nesting**: Konverterer nested CSS til flat CSS
+- **autoprefixer**: Tilføjer vendor prefixes automatisk
+- **cssnano**: Minificerer CSS i production mode
+
+## Vigtige Noter
+
+⚠️ **Rediger ALDRIG de compiled CSS filer direkte!**
+- Alle ændringer skal laves i `src/` mappen
+- De compiled filer bliver overskrevet ved hver build
+
+⚠️ **Husk at køre build før commit**
+- Sørg for at både source og compiled filer er opdateret
+- Kør `npm run css:build` før du committer
+
+## Browser Support
+
+PostCSS sikrer kompatibilitet med:
+- Chrome/Edge (sidste 2 versioner)
+- Firefox (sidste 2 versioner)
+- Safari (sidste 2 versioner)
+
+## Troubleshooting
+
+### CSS ændringer vises ikke
+
+1. Tjek at du har kørt `npm run css:build`
+2. Tjek at du redigerer filer i `src/` mappen
+3. Hard refresh browseren (Ctrl+Shift+R)
+
+### Build fejl
+
+1. Tjek CSS syntax i source filerne
+2. Sørg for at alle `{` har matchende `}`
+3. Tjek at nesting er korrekt formateret

wwwroot/css/src/calendar-layout-css.css

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+/* styles/layout.css - POC Structure Implementation with CSS Nesting */
+
+/* Calendar wrapper container - full viewport */
+.calendar-wrapper {
+  width: 100vw;
+  height: 100vh;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  box-sizing: border-box;
+  overflow: hidden;
+}
+
+/* Main calendar container - full height */
+swp-calendar {
+  display: grid;
+  grid-template-rows: auto 1fr;
+  height: 100vh;
+  width: 100%;
+  background: var(--color-background);
+  position: relative;
+  overflow: hidden;
+  
+  /* Fit to width mode - disable horizontal scroll */
+  &[data-fit-to-width="true"] swp-scrollable-content {
+    overflow-x: hidden;
+  }
+}
+
+/* Navigation bar layout */
+swp-calendar-nav {
+  display: grid;
+  grid-template-columns: auto 1fr auto auto;
+  align-items: center;
+  gap: 20px;
+  padding: 12px 16px;
+  background: var(--color-background);
+  border-bottom: 1px solid var(--color-border);
+  box-shadow: var(--shadow-sm);
+}
+
+/* Calendar container grid - POC structure */
+swp-calendar-container {
+  display: grid;
+  grid-template-columns: 60px 1fr;
+  grid-template-rows: auto 1fr;
+  height: 100%;
+  overflow: hidden;
+  position: relative;
+  
+  /* Week navigation animations */
+  &.week-transition {
+    transition: opacity 300ms ease;
+    
+    &-out {
+      opacity: 0.5;
+    }
+  }
+}
+
+/* Header spacer for time axis alignment */
+swp-header-spacer {
+  grid-column: 1;
+  grid-row: 1;
+  height: calc(var(--header-height) + var(--all-day-row-height));
+  background: var(--color-surface);
+  border-right: 1px solid var(--color-border);
+  border-bottom: 1px solid var(--color-border);
+  z-index: 5;
+  position: relative;
+}
+
+/* All-day chevron button */
+.allday-chevron {
+  position: absolute;
+  bottom: 2px;
+  left: 50%;
+  transform: translateX(-50%);
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 4px 8px;
+  color: #666;
+  transition: transform 0.3s ease, color 0.2s ease;
+  border-radius: 4px;
+  
+  &:hover {
+    color: #000;
+    background-color: rgba(0, 0, 0, 0.05);
+  }
+  
+  &.collapsed {
+    transform: translateX(-50%) rotate(0deg);
+  }
+  
+  &.expanded {
+    transform: translateX(-50%) rotate(180deg);
+  }
+  
+  svg {
+    display: block;
+    width: 12px;
+    height: 8px;
+  }
+}
+
+/* Week container for sliding */
+swp-grid-container {
+  grid-column: 2;
+  grid-row: 1 / 3;
+  display: grid;
+  grid-template-rows: auto 1fr;
+  position: relative;
+  width: 100%;
+  transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1);
+  overflow: hidden;
+}
+
+/* Time axis */
+swp-time-axis {
+  grid-column: 1;
+  grid-row: 2;
+  background: var(--color-surface);
+  border-right: 1px solid var(--color-border);
+  position: relative;
+  left: 0;
+  z-index: 3;
+  width: 60px;
+  overflow: hidden;
+  height: 100%;
+}
+
+/* Time axis content that scrolls */
+swp-time-axis-content {
+  display: flex;
+  flex-direction: column;
+  position: relative;
+}
+
+swp-hour-marker {
+  height: var(--hour-height);
+  padding: 0 8px 8px 15px;
+  font-size: 0.75rem;
+  color: var(--color-text-secondary);
+  display: flex;
+  align-items: flex-start;
+  position: relative;
+  
+  &::before {
+    content: '';
+    position: absolute;
+    top: -1px;
+    left: 50px;
+    width: calc(100vw - 60px);
+    height: 1px;
+    background: var(--color-hour-line);
+    z-index: 2;
+  }
+}
+
+/* Week header - dynamic height based on content */
+swp-calendar-header {
+  display: grid;
+  grid-template-columns: repeat(var(--grid-columns, 7), minmax(var(--day-column-min-width), 1fr));
+  grid-template-rows: var(--header-height) auto;
+  min-width: calc(var(--grid-columns, 7) * var(--day-column-min-width));
+  background: var(--color-surface);
+  position: sticky;
+  top: 0;
+  z-index: 3;
+  height: calc(var(--header-height) + var(--all-day-row-height));
+  overflow-y: scroll;
+  overflow-x: hidden;
+  
+  /* WebKit browsers - hide scrollbar but keep space */
+  &::-webkit-scrollbar {
+    width: 17px;
+    background: transparent;
+  }
+  
+  &::-webkit-scrollbar-thumb {
+    background: transparent;
+  }
+  
+  &::-webkit-scrollbar-track {
+    background: transparent;
+  }
+  
+  /* All-day events container */
+  swp-allday-container {
+    grid-column: 1 / -1;
+    grid-row: 2;
+    display: grid;
+    grid-template-columns: repeat(var(--grid-columns, 7), minmax(var(--day-column-min-width), 1fr));
+    grid-auto-rows: var(--single-row-height);
+    gap: 2px 0px;
+    align-items: center;
+    overflow: hidden;
+  }
+}
+
+/* Day headers */
+swp-day-header {
+  grid-row: 1;
+  text-align: center;
+  border-right: 1px solid var(--color-grid-line);
+  border-bottom: 1px solid var(--color-grid-line);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding-top: 3px;
+  
+  &:last-child {
+    border-right: none;
+  }
+  
+  &[data-today="true"] {
+    background: rgba(33, 150, 243, 0.1);
+    
+    swp-day-name {
+      color: var(--color-primary);
+      font-weight: 600;
+    }
+    
+    swp-day-date {
+      color: var(--color-primary);
+    }
+  }
+}
+
+swp-day-name {
+  display: block;
+  font-weight: 500;
+  font-size: 12px;
+  color: var(--color-text-secondary);
+  letter-spacing: 0.1em;
+}
+
+swp-day-date {
+  display: block;
+  font-size: 30px;
+  margin-top: 4px;
+}
+
+/* Resource header styling */
+swp-resource-header {
+  padding: 12px;
+  text-align: center;
+  border-right: 1px solid var(--color-grid-line);
+  border-bottom: 1px solid var(--color-grid-line);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  background: var(--color-surface);
+  
+  &:last-child {
+    border-right: none;
+  }
+}
+
+swp-resource-avatar {
+  display: block;
+  width: 40px;
+  height: 40px;
+  border-radius: 50%;
+  overflow: hidden;
+  margin-bottom: 8px;
+  background: var(--color-border);
+  
+  img {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+  }
+}
+
+swp-resource-name {
+  display: block;
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--color-text);
+  text-align: center;
+}
+
+/* Ghost columns for mouseenter events */
+swp-allday-column {
+  position: relative;
+  opacity: 0;
+  background: transparent;
+  z-index: 1;
+  height: 100%;
+}
+
+/* All-day events - MASSIVELY OPTIMIZED with nesting */
+swp-allday-container {
+  swp-allday-event {
+    height: 22px !important;
+    position: relative !important;
+    width: auto !important;
+    left: auto !important;
+    right: auto !important;
+    top: auto !important;
+    margin: 1px;
+    padding: 2px 4px;
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    background: hsl(208, 100%, 50%);
+    display: flex;
+    z-index: 2;
+    align-items: center;
+    justify-content: flex-start;
+    color: #fff;
+    font-size: 0.75rem;
+    border-radius: 3px;
+    
+    /* Event type colors - normal state */
+    &[data-type="meeting"] {
+      background: var(--color-event-meeting);
+      color: var(--color-text);
+    }
+    
+    &[data-type="meal"] {
+      background: var(--color-event-meal);
+      color: var(--color-text);
+    }
+    
+    &[data-type="work"] {
+      background: var(--color-event-work);
+      color: var(--color-text);
+    }
+    
+    &[data-type="milestone"] {
+      background: var(--color-event-milestone);
+      color: var(--color-text);
+    }
+    
+    &[data-type="personal"] {
+      background: var(--color-event-personal);
+      color: var(--color-text);
+    }
+    
+    &[data-type="deadline"] {
+      background: var(--color-event-milestone);
+      color: var(--color-text);
+    }
+    
+    /* Dragging state */
+    &.dragging {
+      opacity: 1;
+    }
+    
+    /* Highlight state for all event types */
+    &.highlight {
+      &[data-type="meeting"] {
+        background: var(--color-event-meeting-hl) !important;
+      }
+      
+      &[data-type="meal"] {
+        background: var(--color-event-meal-hl) !important;
+      }
+      
+      &[data-type="work"] {
+        background: var(--color-event-work-hl) !important;
+      }
+      
+      &[data-type="milestone"] {
+        background: var(--color-event-milestone-hl) !important;
+      }
+      
+      &[data-type="personal"] {
+        background: var(--color-event-personal-hl) !important;
+      }
+      
+      &[data-type="deadline"] {
+        background: var(--color-event-milestone-hl) !important;
+      }
+    }
+    
+    /* Overflow indicator styling */
+    &.max-event-indicator {
+      background: #e0e0e0 !important;
+      color: #666 !important;
+      border: 1px dashed #999 !important;
+      cursor: pointer !important;
+      text-align: center !important;
+      font-style: italic;
+      opacity: 0.8;
+      justify-content: center;
+      
+      &:hover {
+        background: #d0d0d0 !important;
+        color: #333 !important;
+        opacity: 1;
+      }
+      
+      span {
+        display: block;
+        width: 100%;
+        text-align: center;
+        font-size: 11px;
+        font-weight: normal;
+      }
+    }
+    
+    &.max-event-overflow-show {
+      opacity: 1;
+      transition: opacity 0.3s ease-in-out;
+    }
+    
+    &.max-event-overflow-hide {
+      opacity: 0;
+      transition: opacity 0.3s ease-in-out;
+    }
+    
+    /* Child elements - no classes needed! */
+    swp-event-time {
+      display: none;
+    }
+    
+    swp-event-title {
+      display: block;
+      font-size: 12px;
+      line-height: 18px;
+    }
+    
+    &.transitioning {
+      transition: grid-area 200ms ease-out, grid-row 200ms ease-out, grid-column 200ms ease-out;
+    }
+  }
+}
+
+/* Scrollable content */
+swp-scrollable-content {
+  overflow-y: auto;
+  overflow-x: auto;
+  scroll-behavior: smooth;
+  position: relative;
+  display: grid;
+  top: -1px;
+  
+  /* Style native scrollbars for Webkit browsers */
+  &::-webkit-scrollbar {
+    width: var(--scrollbar-width, 12px);
+    height: var(--scrollbar-width, 12px);
+  }
+  
+  &::-webkit-scrollbar-track {
+    background: var(--scrollbar-track-color, #f0f0f0);
+  }
+  
+  &::-webkit-scrollbar-thumb {
+    background: var(--scrollbar-color, #666);
+    border-radius: var(--scrollbar-border-radius, 6px);
+    
+    &:hover {
+      background: var(--scrollbar-hover-color, #333);
+    }
+  }
+  
+  /* Style native scrollbars for Firefox */
+  scrollbar-width: auto;
+  scrollbar-color: var(--scrollbar-color, #666) var(--scrollbar-track-color, #f0f0f0);
+}
+
+/* Time grid */
+swp-time-grid {
+  position: relative;
+  height: calc((var(--day-end-hour) - var(--day-start-hour)) * var(--hour-height));
+  
+  /* Global work hours overlay - disabled */
+  &::before {
+    content: '';
+    position: absolute;
+    top: 0;
+    height: 0;
+    left: 0;
+    right: 0;
+    background: transparent;
+    min-width: calc(var(--grid-columns, 7) * var(--day-column-min-width));
+    display: none;
+  }
+  
+  /* Add hour lines as background */
+  &::after {
+    content: '';
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    min-width: calc(var(--grid-columns, 7) * var(--day-column-min-width));
+    background-image: repeating-linear-gradient(to bottom,
+        transparent,
+        transparent calc(var(--hour-height) - 1px),
+        var(--color-hour-line) calc(var(--hour-height) - 1px),
+        var(--color-hour-line) var(--hour-height));
+    z-index: 1;
+  }
+}
+
+/* Grid lines */
+swp-grid-lines {
+  position: absolute;
+  top: 0px;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  min-width: calc(var(--grid-columns, 7) * var(--day-column-min-width));
+  z-index: var(--z-grid);
+  background-image: repeating-linear-gradient(to bottom,
+      transparent,
+      transparent calc(var(--hour-height) / 4 - 1px),
+      var(--color-grid-line-light) calc(var(--hour-height) / 4 - 1px),
+      var(--color-grid-line-light) calc(var(--hour-height) / 4));
+}
+
+/* Day columns */
+swp-day-columns {
+  position: absolute;
+  inset: 0;
+  display: grid;
+  grid-template-columns: repeat(var(--grid-columns, 7), minmax(var(--day-column-min-width), 1fr));
+  min-width: calc(var(--grid-columns, 7) * var(--day-column-min-width));
+  
+  swp-event {
+    /* Placeholder for event styles from calendar-events-css.css */
+  }
+}
+
+/* Day column with work hours */
+swp-day-column {
+  position: relative;
+  border-right: 1px solid var(--color-grid-line);
+  min-width: var(--day-column-min-width);
+  background: var(--color-event-grid);
+  
+  &:last-child {
+    border-right: none;
+  }
+  
+  /* Per-column non-work hours overlays */
+  &::before,
+  &::after {
+    content: '';
+    position: absolute;
+    left: 0;
+    right: 0;
+    background: var(--color-non-work-hours);
+    z-index: 2;
+    opacity: 0.3;
+  }
+  
+  &::before {
+    top: 0;
+    height: var(--before-work-height, 0px);
+  }
+  
+  &::after {
+    top: var(--after-work-top, 100%);
+    bottom: 0;
+  }
+  
+  /* Full day overlay when day is off */
+  &[data-work-hours="off"] {
+    background: var(--color-non-work-hours);
+    
+    &::before,
+    &::after {
+      display: none;
+    }
+  }
+}
+
+/* Resource column styling */
+swp-resource-column {
+  position: relative;
+  border-right: 1px solid var(--color-grid-line);
+  min-width: var(--day-column-min-width);
+  background: var(--color-event-grid);
+  
+  &:last-child {
+    border-right: none;
+  }
+}
+
+swp-events-layer {
+  position: absolute;
+  inset: 0;
+  display: block;
+  z-index: var(--z-event);
+}
+
+/* Current time indicator */
+swp-current-time-indicator {
+  position: absolute;
+  left: 0;
+  right: 0;
+  height: 2px;
+  background: var(--color-current-time);
+  z-index: var(--z-current-time);
+  
+  /* Time label */
+  &::before {
+    content: attr(data-time);
+    position: absolute;
+    left: -55px;
+    top: -10px;
+    background: var(--color-current-time);
+    color: white;
+    padding: 2px 6px;
+    font-size: 0.75rem;
+    border-radius: 3px;
+    white-space: nowrap;
+  }
+  
+  /* Animated dot */
+  &::after {
+    content: '';
+    position: absolute;
+    right: -4px;
+    top: -4px;
+    width: 10px;
+    height: 10px;
+    background: var(--color-current-time);
+    border-radius: 50%;
+    box-shadow: 0 0 0 2px rgba(255, 0, 0, 0.3);
+  }
+}

wwwroot/css/src/test-nesting.css

@@ -0,0 +1,26 @@
+/* Test file for CSS nesting */
+
+.test-container {
+  display: flex;
+  padding: 20px;
+  
+  .test-child {
+    color: blue;
+    
+    &:hover {
+      color: red;
+    }
+    
+    &.active {
+      font-weight: bold;
+    }
+  }
+  
+  .test-nested {
+    margin: 10px;
+    
+    .deep-nested {
+      font-size: 14px;
+    }
+  }
+}

wwwroot/css/test-nesting.css

@@ -0,0 +1 @@
+.test-container{display:flex;padding:20px}.test-container .test-child{color:blue}:is(.test-container .test-child):hover{color:red}.active:is(.test-container .test-child){font-weight:700}.test-container .test-nested{margin:10px}:is(.test-container .test-nested) .deep-nested{font-size:14px}