Calendar/wwwroot/css/calendar-layout-css.css

/* styles/layout.css */

/* Main calendar container */
swp-calendar {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--color-background);
  position: relative;
}

/* 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 (following POC structure) */
swp-calendar-container {
  flex: 1;
  display: grid;
  grid-template-columns: 60px 1fr;
  grid-template-rows: 1fr;
  overflow: hidden;
  position: relative;
}

/* Time axis (fixed, left side) */
swp-time-axis {
  grid-column: 1;
  grid-row: 1;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  position: sticky;
  left: 0;
  z-index: 4;
  padding-top: 80px; /* Match header height */
  overflow-y: hidden; /* Hide scrollbar but allow programmatic scrolling */
  overflow-x: hidden;
}

/* Week container for sliding */
swp-week-container {
  grid-column: 2;
  display: grid;
  grid-template-rows: auto 1fr;
  position: relative;
  width: 100%;
  transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Week header (inside week container) */
swp-week-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 3;
  height: 80px; /* Fixed height */
}

/* Scrollable content */
swp-scrollable-content {
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
  position: relative;
  flex: 1;
  min-height: 0; /* Important for flex children to shrink */
  max-height: calc(100vh - 80px - 80px); /* Subtract nav height and week-header height */
}

swp-week-container.slide-out-left {
  transform: translateX(-100%);
}

swp-week-container.slide-out-right {
  transform: translateX(100%);
}

swp-week-container.slide-in-left {
  transform: translateX(-100%);
}

swp-week-container.slide-in-right {
  transform: translateX(100%);
}

swp-hour-marker {
  height: var(--hour-height);
  padding: 8px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  position: relative;
  
  /* Hour line extending into calendar */
  &::after {
    content: '';
    position: absolute;
    top: 0;
    left: 100%;
    width: 100vw;
    height: 1px;
    background: var(--color-grid-line);
    pointer-events: none;
  }
}

/* Day header styling (inside week-header) */

swp-day-header {
  padding: 12px;
  text-align: center;
  border-right: 1px solid var(--color-grid-line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

swp-day-header:last-child {
  border-right: none;
}

swp-day-name {
  display: block;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

swp-day-date {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 4px;
}

swp-day-header[data-today="true"] swp-day-date {
  color: var(--color-primary);
  background: rgba(33, 150, 243, 0.1);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 4px auto 0;
}

/* All-day events container */
swp-allday-container {
  position: sticky;
  top: 0;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  min-height: 0;
  z-index: 2;
  
  &:not(:empty) {
    padding: 8px 0;
  }
}

/* Time grid */
swp-time-grid {
  position: relative;
  height: calc(24 * var(--hour-height));
}

swp-time-grid::before {
  content: '';
  position: absolute;
  top: calc((var(--work-start-hour) - var(--day-start-hour)) * var(--hour-height));
  height: calc((var(--work-end-hour) - var(--work-start-hour)) * var(--hour-height));
  left: 0;
  right: 0;
  background: var(--color-work-hours);
  pointer-events: none;
}

/* Grid lines */
swp-grid-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-grid);
  background-image:
    /* Hour lines (stronger) */
    repeating-linear-gradient(
      to bottom,
      transparent,
      transparent calc(var(--hour-height) - 1px),
      var(--color-grid-line) calc(var(--hour-height) - 1px),
      var(--color-grid-line) var(--hour-height)
    ),
    /* Quarter hour lines (lighter) */
    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)
    );
}

/* Ensure grid lines are visible during transitions */
swp-week-container swp-grid-lines {
  opacity: 1;
  visibility: visible;
}

/* Grid lines should remain visible even during animations */
swp-week-container.slide-out-left swp-grid-lines,
swp-week-container.slide-out-right swp-grid-lines,
swp-week-container.slide-in-left swp-grid-lines,
swp-week-container.slide-in-right swp-grid-lines {
  opacity: 1;
  visibility: visible;
}

/* Day columns */
swp-day-columns {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}

swp-day-column {
  position: relative;
  border-right: 1px solid var(--color-grid-line);
}

swp-day-column:last-child {
  border-right: none;
}

swp-events-layer {
  position: absolute;
  inset: 0;
}

/* Current time indicator */
swp-current-time-indicator {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-current-time);
  pointer-events: none;
  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);
  }
  
  /* Position based on current time */
  top: calc(var(--current-minutes) * var(--minute-height));
}