/* ── Classroom Detail Panel ────────────────────────────────────────── */

/* Sits inside .body-container at the same level as .tab-content divs.
   Hidden by default (via the [hidden] attribute); shown as a flex column
   that fills the remaining space when the detail-open class is on body. */

#classroom-detail-overlay:not([hidden]) {
  display: flex;
  flex-direction: column;
  flex: 1;
  background: var(--background-color);

  /* Fallback fade-in for browsers without View Transitions */
  opacity: 0;
  transition: opacity 0.22s ease;
  will-change: opacity;
}

#classroom-detail-overlay.visible {
  opacity: 1;
}

/* Hide tab contents and footer while the detail panel is open */
body.detail-open .tab-content {
  visibility: hidden;
  position: absolute;
  opacity: 0;
  pointer-events: none;
  height: 0;
  overflow: hidden;
}

body.detail-open .footer {
  visibility: hidden;
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* Disable background animations while the detail panel is open to save CPU/GPU */
body.detail-open .tab-content,
body.detail-open .tab-content * {
  animation: none !important;
  transition: none !important;
}

/* ── Hero photo ─────────────────────────────────────────────────── */

.detail-photo-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: color-mix(in srgb, var(--text-color-primary) 5%, transparent);
  animation: detail-skeleton-pulse 1.4s ease-in-out infinite;

  align-self: center;
  flex-shrink: 0;

  transition: box-shadow 0.4s ease, background-color 0.4s ease;
}

/* Mobile "Hero Header" style */
@media (max-width: 599px) {
  .detail-photo-container {
    width: 100%;
    /* Stabilize height: no longer just a byproduct of width. */
    aspect-ratio: auto;
    height: 38vh;
    min-height: 280px;
    border-radius: 0;
    
    /* Pull it up to sit exactly behind the entire header.
       We subtract the 1rem padding of .body-container and the full header height. */
    margin-top: calc(-1 * var(--header-height, 80px) - 1rem);
    
    box-shadow: none;
  }
}

/* Desktop "Card" style */
@media (min-width: 600px) {
  .detail-photo-container {
    width: 92%;
    max-width: 720px;
    aspect-ratio: 16 / 9;
    border-radius: 1.5rem;
    margin-top: 0.5rem;
    box-shadow: var(--shadow);
  }
}

.detail-photo-container.loaded {
  animation: none;
  background: var(--background-color-secondary);
}

@media (max-width: 599px) {
  .detail-photo-container.loaded {
    background: var(--background-color);
  }
}

@media (min-width: 600px) {
  .detail-photo-container.loaded {
    box-shadow: var(--shadow);
  }
}

.detail-photo {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  opacity: 0;
  transform: scale(1.05);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (max-width: 599px) {
  .detail-photo {
    /* Use a mask to fade out the image itself at the bottom to avoid "line" artifacts
       between the image and the background blur layer. */
    mask-image: linear-gradient(to bottom, black 70%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 70%, transparent 100%);
  }
}

.detail-photo.loaded {
  opacity: 1;
  /* scale(1.001) keeps the image fractionally larger than its overflow:hidden
     container at all times — including the final frame — so Safari never
     recalculates the overflow clip and the repaint flicker doesn't occur. */
  transform: scale(1.001);
}

.detail-photo-gradient {
  position: absolute;
  inset: 0;
  opacity: 0;
  /* Use a faster transition than the image (0.6s) to ensure the blur/gradient 
     is already established or feels immediate as the image fades in. */
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.detail-photo.loaded + .detail-photo-gradient {
  opacity: 1;
}

@media (max-width: 599px) {
  .detail-photo-gradient {
    /* Gradient Blur: a more sophisticated approach using a taller, fixed-height 
       area and a smoother mask to ensure the blur feels substantial on all screens. */
    top: auto;
    height: 180px; /* Consistent blur height regardless of image height */
    
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    
    /* Smoother fade-out for the blur itself. */
    mask-image: linear-gradient(to top, 
      black 0%, 
      black 20%, 
      rgba(0, 0, 0, 0.5) 60%, 
      transparent 100%
    );
    -webkit-mask-image: linear-gradient(to top, 
      black 0%, 
      black 20%, 
      rgba(0, 0, 0, 0.5) 60%, 
      transparent 100%
    );

    /* Blend into the background color with a matching gradient. */
    background: linear-gradient(to top, 
      var(--background-color) 0%, 
      color-mix(in srgb, var(--background-color) 80%, transparent) 30%,
      transparent 100%
    );
  }
}

/* ── Header ─────────────────────────────────────────────────────── */

/* Back button lives in .header-nav-row, pinned to the left while tabbar stays centered */
#detail-back-btn {
  position: absolute;
  left: 1rem;
  z-index: 10; /* Ensure it stays above the immersive photo */
}

#detail-back-btn[hidden] {
  display: none;
}

.detail-header {
  padding: 1.25rem 1.25rem 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  align-items: flex-start; /* Mobile default */
}

.detail-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  width: 100%;
  gap: 1rem;
}

@media (min-width: 600px) {
  .detail-title-row {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: auto;
  }
}

.detail-status-wrapper {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

@media (min-width: 600px) {
  .detail-status-wrapper {
    align-items: center;
  }
}

.detail-status-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-color-secondary);
  opacity: 0.65;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.1rem;
}

.detail-title-row .classroom-status-txt {
  font-size: 0.95rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.85;
}

@media (min-width: 600px) {
  .detail-header {
    align-items: center; /* Desktop centered */
  }
}

@media (max-width: 599px) {
  .detail-header {
    padding-top: 1rem;
    gap: 0;
    position: relative;
    z-index: 2; /* Stay above the blur layer */
  }

  .detail-title-row {
    align-items: last baseline;
  }

  /* Pull header up to overlay the blurred hero only when the photo container is present.
     This also handles the photo-load-error case: once the container is removed from the DOM
     the negative margin is lifted and the header reflows into its natural position. */
  #classroom-detail-overlay:has(.detail-photo-container) .detail-header {
    margin-top: -6rem;
  }

  .detail-title {
    /* Align perfectly with the floating back button */
    padding-top: 0.25rem;
  }
}

.detail-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-color-primary);
  cursor: pointer;
  user-select: none;
}

.detail-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

.detail-stat {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-color-secondary);
}

.detail-stat .material-symbols-outlined {
  font-size: 1.1rem !important;
  color: var(--text-color-accent);
}

.detail-back-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.125rem;
  padding: 0.375rem 0.875rem 0.375rem 0.5rem;
  border-radius: 999px;
  border: none;
  
  /* Use a more opaque, theme-aware background with strong blur to ensure contrast over images */
  background: color-mix(in srgb, var(--background-color-secondary) 82%, transparent);
  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, 0.35),
    inset -1px -1px 0 rgba(255, 255, 255, 0.1),
    var(--shadow);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  
  color: var(--text-color-primary);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
  
  /* Ensure the button and its content adapt their internal rendering to the theme */
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  .detail-back-btn {
    /* Slightly less opaque in dark mode to feel more "glassy" but still legible */
    background: color-mix(in srgb, var(--background-color-secondary) 72%, transparent);
    box-shadow:
      inset 1px 1px 0 rgba(255, 255, 255, 0.08),
      inset -1px -1px 0 rgba(255, 255, 255, 0.03),
      var(--shadow);
  }
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .detail-back-btn {
    background: color-mix(in srgb, var(--background-color-secondary) 95%, black);
  }

  @media (prefers-color-scheme: dark) {
    .detail-back-btn {
      background: color-mix(in srgb, var(--background-color-secondary) 95%, white);
    }
  }
}

.detail-back-btn:hover {
  background: color-mix(in srgb, var(--text-color-primary) 18%, transparent);
}

.detail-back-btn:active {
  transform: scale(0.95);
}

.detail-back-btn .material-symbols-outlined {
  font-size: 1.25rem;
  margin-left: -0.125rem;
}

/* ── Content ─────────────────────────────────────────────────────── */

.detail-content {
  width: 100%;
  padding: 1rem 1.25rem 4rem;
  max-width: 680px;
  margin: 0 auto;
  text-align: left;
}

.detail-subtitle {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: left;
}

@media (max-width: 599px) {
  .detail-subtitle {
    margin-bottom: 0.25rem;
  }

  .detail-stats {
    margin-top: 0;
  }
}

@media (min-width: 600px) {
  .detail-subtitle {
    text-align: center;
    margin-bottom: 2rem;
  }
}

/* ── Section ─────────────────────────────────────────────────────── */

.detail-section {
  margin-bottom: 2rem;
}

.detail-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-color-secondary);
  margin: 0 0 0.75rem;
}

.detail-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.detail-section-header .detail-section-title {
  margin-bottom: 0;
}

.detail-schedule-legend {
  display: flex;
  gap: 0.75rem;
}

.detail-schedule-legend-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.detail-schedule-legend-box {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 2px;
  background: var(--accent-gradient);
  border: 1px solid color-mix(in srgb, var(--text-color-accent) 20%, black);
  opacity: 0.85;
}

@media (prefers-color-scheme: dark) {
  .detail-schedule-legend-box {
    border-color: color-mix(in srgb, var(--text-color-accent) 20%, white);
  }
}

.detail-schedule-legend-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-color-secondary);
  opacity: 0.8;
}

/* ── Features ─────────────────────────────────────────────────────── */

.detail-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.detail-feature-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.4rem 0.875rem 0.4rem 0.625rem;
  background: var(--background-color-secondary);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-color-primary);
  box-shadow: var(--shadow);
}

.detail-feature-chip .material-symbols-outlined {
  font-size: 1.1rem;
  color: var(--text-color-accent);
}

.detail-no-features {
  font-size: 0.875rem;
  margin: 0;
}

/* ── Weekly Schedule ─────────────────────────────────────────────── */

/* Desktop: create space on the left for the today indicator */
@media (min-width: 600px) {
  .detail-schedule-inner {
    padding-left: 4.5rem;
  }
}

.detail-schedule-grid {
  position: relative;
  display: flex;
  flex-direction: row;
  gap: 0.875rem;
  align-items: center;
  margin-bottom: 0.25rem;
}

/* Left pill: vertical date picker clone */
.detail-schedule-labels-pill {
  flex-shrink: 0;
  width: 3.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.75rem;

  background-color: var(--background-color-secondary);
  border-radius: 999px;
  padding: 0.75rem 0.5rem;

  box-shadow:
    inset 1px 1px 0 rgba(255, 255, 255, 0.3),
    inset -1px -1px rgba(255, 255, 255, 0.1),
    var(--shadow);
}

/* Override date-element-container sizing to fit the vertical pill */
.detail-schedule-labels-pill .date-element-container {
  aspect-ratio: unset;
  width: 100%;
  height: 2.625rem; /* match bar height */
}

.detail-schedule-label-cell--today .date-day-of-week,
.detail-schedule-label-cell--today .date-number {
  color: var(--text-color-accent);
  font-weight: bold;
  opacity: 1;
}

/* Desktop Today indicator — floats to the left of the labels pill, points right */
.detail-desktop-today-indicator {
  display: none; /* shown only on desktop via media query below */
}

@media (min-width: 600px) {
  .detail-desktop-today-indicator {
    display: block;
    position: absolute;
    right: calc(100% + 8px); /* 8px gap between indicator and pill */

    background: var(--text-color-accent);
    color: white;
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 800;
    white-space: nowrap;
    cursor: default;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--text-color-accent) 40%, transparent);

    opacity: 0;
    animation: detail-today-indicator-appear 0.55s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards;

    will-change: transform, opacity;
    transition: scale 0.15s ease;
  }

  .detail-desktop-today-indicator::after {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: var(--text-color-accent);
  }

  .detail-desktop-today-indicator.hidden {
    display: none;
  }
}

@media (min-width: 600px) and (prefers-color-scheme: dark) {
  .detail-desktop-today-indicator {
    background: #28a745;
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.4);
  }
  .detail-desktop-today-indicator::after {
    border-left-color: #28a745;
  }
}

@keyframes detail-today-indicator-appear {
  0% {
    opacity: 0;
    transform: translateX(-10px) scale(0.75);
    filter: blur(4px);
  }
  100% {
    opacity: 1;
    transform: translateX(0) scale(1);
    filter: blur(0);
  }
}

/* Right column: grid lines + bar rows */
.detail-schedule-bars {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Vertical grid lines container */
.detail-schedule-grid-lines {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  pointer-events: none;
  z-index: 0;
}

.detail-schedule-grid-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos);
  width: 1px;
  background: color-mix(in srgb, var(--text-color-primary) 8%, transparent);
}

.detail-schedule-row {
  position: relative;
  z-index: 1;
}

.detail-schedule-row--today .detail-schedule-bar {
  background: color-mix(in srgb, var(--text-color-accent) 4%, transparent);
  border-color: color-mix(in srgb, var(--text-color-accent) 25%, transparent);
}

.detail-schedule-bar-wrapper {
  position: relative;
}

.detail-schedule-bar {
  position: relative;
  height: 2.625rem;
  background: color-mix(in srgb, var(--text-color-primary) 5%, transparent);
  border-radius: 0.5rem;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--text-color-primary) 10%, transparent);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.detail-schedule-block {
  position: absolute;
  top: 3px;
  bottom: 3px;
  /* Increased side gaps for better separation between consecutive blocks */
  left: calc(var(--block-start) + 2px);
  width: calc(var(--block-size) - 4px);
  border-radius: 4px;
  background: var(--accent-gradient);
  opacity: 0.85;
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
  border: 1px solid color-mix(in srgb, var(--text-color-accent) 20%, black);
}

@media (prefers-color-scheme: dark) {
  .detail-schedule-block {
    border-color: color-mix(in srgb, var(--text-color-accent) 20%, white);
  }
}

.detail-schedule--hide-sundays .detail-schedule-row--sunday,
.detail-schedule--hide-sundays .detail-schedule-label-cell--sunday {
  display: none;
}

.detail-schedule-row--sunday .detail-schedule-bar {
  background: color-mix(in srgb, #e53935 8%, transparent);
  border-color: color-mix(in srgb, #e53935 15%, transparent);
}

.detail-schedule-ticks .timeline-time-indicator--now {
  position: absolute;
  top: 1px;
  left: var(--pos);
  transform: translateX(-50%);
  z-index: 10;
  background: #2196F3;
  color: white;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 800;
  box-shadow: 0 2px 8px rgba(33, 150, 243, 0.4);
}

/* Arrow for the now indicator at the top */
.detail-schedule-ticks .timeline-time-indicator--now::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: #2196F3;
}

.detail-schedule-bar-wrapper .timeline-time-indicator--now {
  display: none;
}

.detail-schedule-now-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--pos);
  width: 2px;
  transform: translateX(-50%);
  background: #2196F3;
  pointer-events: none;
  z-index: 4;
}

.detail-schedule-now-line::before,
.detail-schedule-now-line::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 6px;
  height: 6px;
  background: inherit;
  border-radius: 50%;
  transform: translateX(-50%);
}

.detail-schedule-now-line::before { top: -3px; }
.detail-schedule-now-line::after { bottom: -3px; }

.detail-schedule-bar-wrapper .timeline-hover-cursor {
  position: absolute;
  top: 0;
  transform: translateX(-50%) translateY(calc(-100% - 8px));

  background: var(--background-color);
  color: var(--text-color-primary);
  border: 1px solid color-mix(in srgb, var(--text-color-primary) 18%, transparent);
  border-radius: 0.5rem;
  padding: 3px 8px;
  font-size: 0.72rem;
  font-weight: bold;
  white-space: nowrap;
  box-shadow: var(--shadow);

  pointer-events: none;
  user-select: none;
  z-index: 10;
}

/* Border triangle (1px larger, in border color, sits behind the fill triangle) */
.detail-schedule-bar-wrapper .timeline-hover-cursor::before {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: color-mix(in srgb, var(--text-color-primary) 18%, transparent);
}

/* Fill triangle (covers the border triangle except the bottom tip) */
.detail-schedule-bar-wrapper .timeline-hover-cursor::after {
  content: '';
  position: absolute;
  top: calc(100% - 1px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--background-color);
}

.detail-schedule-bar .timeline-hover-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
  background: color-mix(in srgb, var(--text-color-primary) 35%, transparent);
  pointer-events: none;
  z-index: 5;
}

.detail-schedule-ticks {
  position: relative;
  height: 3rem;
  /* Matched to labels pill width (3.75rem) + gap (0.875rem) */
  margin-left: calc(3.75rem + 0.875rem);
  margin-bottom: 0.15rem;
  overflow: visible;
}

.detail-schedule-tick {
  position: absolute;
  bottom: 0;
  left: var(--pos);
  transform: translateX(-50%);
  pointer-events: none;
}


.detail-schedule-tick--quarter {
  opacity: 0.4;
  font-size: 0.5rem;
}

.detail-schedule-tick span {
  font-size: 0.6rem;
  color: var(--text-color-secondary);
  font-weight: 600;
}

/* ── Vertical layout (mobile) ────────────────────────────────────── */

/* Day selector and now-bar-line: mobile-only */
.detail-schedule-day-selector,
.timeline-now-bar-line {
  display: none;
}

@media (max-width: 599px) {
  .detail-schedule-day-selector,
  .timeline-now-bar-line {
    display: block;
  }

  .detail-schedule-ticks .timeline-time-indicator--now,
  .detail-schedule-now-line {
    display: none;
  }

  /* Override date-picker-container defaults for this context */
  .detail-schedule-picker {
    margin-top: 0;
    margin-bottom: 0; /* gap handled by container */
    margin-left: auto;
    margin-right: auto;
    max-width: 90% !important; /* Force it to stay within parent's 90% as in Available tab */
    
    /* align-self: center (from date-picker.css) works here because the parent is a flexbox */
    align-self: center;
    opacity: 1 !important; /* date-picker-container starts at 0 until JS fires */
  }

  .detail-schedule-day-selector {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    overflow: visible;
    position: relative;
    padding-top: 2rem; /* room for the today indicator pill above the picker */
  }

  .detail-today-indicator {
    position: absolute;
    transform: translateX(-50%);

    background: var(--text-color-accent);
    color: white;
    border-radius: 999px;
    padding: 2px 10px;
    font-size: 0.72rem;
    font-weight: 800;
    white-space: nowrap;
    cursor: pointer;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--text-color-accent) 40%, transparent);
    transform-origin: bottom center;

    opacity: 0;
    animation: today-indicator-appear 0.65s linear 0.35s forwards;

    will-change: transform, scale;
    transition: scale 0.15s ease, background-color 0.2s ease;
  }

  .detail-today-indicator::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--text-color-accent);
  }

  .detail-today-indicator.hidden {
    display: none;
  }

  .detail-today-indicator:hover {
    scale: 1.05;
    background: color-mix(in srgb, var(--text-color-accent) 85%, black);
  }

  /* Container: column — selector on top, then time axis + bar below */
  #detail-schedule-container {
    --schedule-bar-height: clamp(240px, 48svh, 480px);
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  /* Inner row: time axis on the left, single day bar fills the rest */
  .detail-schedule-inner {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    justify-content: center;
    gap: 0.625rem;
    overflow: visible; /* clip was silently cutting off bar edges on narrow screens */
  }

  @media (max-width: 600px) {
    .detail-schedule-inner {
      width: 15rem;
      align-self: center;
      padding-right: 3.5rem;
    }
  }

  /* Time axis */
  .detail-schedule-ticks {
    flex-shrink: 0;
    width: 3.5rem;
    height: var(--schedule-bar-height);
    margin-top: 0;
    margin-left: 0;
    margin-bottom: 0;
    overflow: visible;
  }

  .detail-schedule-tick span {
    font-size: 0.7rem;
  }

  .detail-schedule-tick {
    left: auto;
    right: 0;
    bottom: auto;
    top: var(--pos);
    transform: translateY(-50%);
    text-align: right;
  }

  /* Now indicator: outside the bar, to the right, arrow pointing left */
  .detail-schedule-bar-wrapper .timeline-time-indicator--now {
    display: block;
    left: calc(100% + 0.5rem);
    right: auto;
    top: var(--pos);
    transform: translateY(-50%);
    transform-origin: left center;
    background: #2196F3;
    color: white;
    box-shadow: 0 2px 8px rgba(33, 150, 243, 0.4);
    animation: now-indicator-appear-mobile 0.65s linear 0.35s forwards;
  }

  /* Arrow points left toward the bar */
  .detail-schedule-bar-wrapper .timeline-time-indicator--now::after {
    top: 50%;
    right: 95%;
    left: auto;
    border-top-color: transparent;
    border-right-color: #2196F3;
    transform: translateY(-50%);
  }

  @keyframes now-indicator-appear-mobile {
    0% {
      opacity: 0;
      transform: translateX(-40px) translateY(-50%) scale(0, 0);
      filter: blur(16px);
      animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
    }
    25% {
      opacity: 1;
      transform: translateX(0) translateY(-50%) scale(0.85, 0.25);
      filter: blur(2px);
      animation-timing-function: cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    75% {
      transform: translateX(0) translateY(-50%) scale(1.06, 1.08);
      filter: blur(0);
      animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
    }
    100% {
      opacity: 1;
      transform: translateX(0) translateY(-50%) scale(1, 1);
      filter: blur(0);
    }
  }

  /* Grid: fills all remaining space after the ticks column */
  .detail-schedule-grid {
    flex: 1;
    flex-direction: row;
    gap: 0;
    min-width: 0;
    max-width: 18rem;
  }

  .detail-schedule-grid-lines {
    left: 0;
  }

  .detail-schedule-now-line {
    display: none;
  }

  /* All day rows hidden on mobile; only .selected is shown */
  .detail-schedule-row {
    display: none;
    flex-direction: column;
    align-items: stretch;
    flex: 1;
    gap: 0;
  }

  .detail-schedule-row.selected {
    display: flex;
    animation: detail-row-fade-in 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  .detail-schedule-row.selected .detail-schedule-block {
    animation: detail-block-appear 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
    animation-delay: calc(var(--idx) * 0.04s + 0.1s);
  }

  @keyframes detail-row-fade-in {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes detail-block-appear {
    from {
      opacity: 0;
      transform: scaleX(0.85) scaleY(0.85);
      filter: blur(4px);
    }
    to {
      opacity: 0.85;
      transform: scaleX(1) scaleY(1);
      filter: blur(0);
    }
  }

  /* Labels pill redundant on mobile — chip selector shows the current day */
  .detail-schedule-labels-pill {
    display: none;
  }

  .detail-schedule-bar-wrapper {
    flex: 1;
  }

  /* Vertical bar */
  .detail-schedule-bar {
    height: var(--schedule-bar-height);
    width: 100%;
    border-radius: 0.75rem;
  }

  /* Blocks: vertical positioning using the CSS vars */
  .detail-schedule-block {
    /* Increased gaps for better separation between consecutive blocks on mobile */
    top: calc(var(--block-start) + 2px);
    height: calc(var(--block-size) - 4px);
    left: 3px;
    right: 3px;
    width: auto;
    bottom: auto;
    border-radius: 6px;
  }

  /* Grid lines on mobile: horizontal */
  .detail-schedule-grid-line {
    left: 0;
    right: 0;
    top: var(--pos);
    bottom: auto;
    width: auto;
    height: 1px;
  }

  /* Hide Sunday chips when hide-sundays is active */
  .detail-schedule--hide-sundays .detail-schedule-day--sunday {
    display: none;
  }

  /* Hover cursor: floats to the right of the bar, vertically centred on the mouse */
  .detail-schedule-bar-wrapper .timeline-hover-cursor {
    left: calc(100% + 0.5rem);
    top: 0; /* overridden by JS */
    right: auto;
    transform: translateY(-50%);
  }

  /* No downward arrow — cursor is beside the bar, not above it */
  .detail-schedule-bar-wrapper .timeline-hover-cursor::before,
  .detail-schedule-bar-wrapper .timeline-hover-cursor::after {
    display: none;
  }

  /* Hover line: horizontal sweep across the bar */
  .detail-schedule-bar .timeline-hover-line {
    top: 0; /* overridden by JS */
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 2px;
    transform: translateY(-50%);
  }

  /* Now indicator line inside today's bar */
  .timeline-now-bar-line {
    position: absolute;
    left: 3px;
    right: 3px;
    top: var(--pos);
    height: 2px;
    background: #2196F3;
    transform: translateY(-50%);
    z-index: 4;
    pointer-events: none;
  }

  .timeline-now-bar-line::before,
  .timeline-now-bar-line::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 6px;
    height: 6px;
    background: inherit;
    border-radius: 50%;
    transform: translateY(-50%);
  }
  .timeline-now-bar-line::before { left: -3px; }
  .timeline-now-bar-line::after { right: -3px; }
}

/* ── Skeleton loading ─────────────────────────────────────────────── */

.detail-schedule-loading {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.detail-schedule-skeleton {
  height: 1.625rem;
  background: color-mix(in srgb, var(--text-color-primary) 8%, transparent);
  border-radius: 0.4rem;
  animation: detail-skeleton-pulse 1.4s ease-in-out infinite;
}

.detail-schedule-skeleton:nth-child(odd) {
  animation-delay: 0.1s;
}

@keyframes detail-skeleton-pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.8; }
}

/* ── Tabbar hidden state (when detail overlay is open) ───────────── */
/* Uses !important to override the animation-fill-mode: forwards from .slide-in-top */

.tabbar.detail-open {
  opacity: 0 !important;
  pointer-events: none !important;
}

/* ── View Transition animation overrides ──────────────────────────── */

@supports (view-transition-name: none) {
  /* Suppress the CSS opacity fallback transition when VT is available */
  #classroom-detail-overlay {
    transition: none;
  }

  /* Shared element: tabbar shrinks and morphs into the back button (and reverses on close) */
  ::view-transition-group(classroom-nav) {
    animation-duration: 0.42s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  }

  ::view-transition-old(classroom-nav) {
    animation-duration: 0.2s;
    animation-timing-function: ease-out;
  }

  ::view-transition-new(classroom-nav) {
    animation-duration: 0.35s;
    animation-timing-function: ease-in;
    animation-delay: 0.1s;
  }

  /* Shared element: classroom name morphs card → overlay title */
  ::view-transition-group(classroom-detail-name) {
    animation-duration: 0.35s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* With fit-content on both elements the boxes are near-identical in size,
     so the group is essentially a position-only morph with minimal scaling. */
  ::view-transition-old(classroom-detail-name),
  ::view-transition-new(classroom-detail-name) {
    animation-duration: 0.35s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* Root cross-fade (for everything else: background, tabbar, etc.) */
  ::view-transition-old(root),
  ::view-transition-new(root) {
    animation-duration: 0.25s;
  }
}

@media (max-width: 599px) and (prefers-color-scheme: dark) {
  .detail-today-indicator {
    background: #28a745;
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.4);
  }
  .detail-today-indicator::after {
    border-top-color: #28a745;
  }
  .detail-today-indicator:hover {
    background: #218838;
  }
}