/* Stundenplan-only enhancements (scoped, no redesign). */

body.timetable-page .timetable-week-grid {
  overflow: auto; /* Enables sticky headers/rail and "Now" scrolling */
}

/* Stronger scanability: subtle alternating hour bands + clearer separators */
body.timetable-page .timeline-rail {
  background: repeating-linear-gradient(
    to bottom,
    color-mix(in srgb, var(--surface-subtle-bg) 88%, transparent) 0,
    color-mix(in srgb, var(--surface-subtle-bg) 88%, transparent) 1px,
    transparent 1px,
    transparent var(--timeline-hour-height)
  );
}

body.timetable-page .timeline-day {
  border-left: 1px solid color-mix(in srgb, var(--border-strong) 92%, transparent);
  background-color: var(--surface-strong);
  background-image:
    repeating-linear-gradient(
      to bottom,
      color-mix(in srgb, var(--surface-soft) 22%, transparent) 0,
      color-mix(in srgb, var(--surface-soft) 22%, transparent) var(--timeline-hour-height),
      transparent var(--timeline-hour-height),
      transparent calc(var(--timeline-hour-height) + var(--timeline-hour-height))
    ),
    repeating-linear-gradient(
      to bottom,
      color-mix(in srgb, var(--border-strong) 92%, transparent) 0,
      color-mix(in srgb, var(--border-strong) 92%, transparent) 1px,
      transparent 1px,
      transparent calc(var(--timeline-hour-height) / 2 - 1px),
      color-mix(in srgb, var(--border-subtle) 88%, transparent) calc(var(--timeline-hour-height) / 2),
      color-mix(in srgb, var(--border-subtle) 88%, transparent) calc(var(--timeline-hour-height) / 2 + 1px),
      transparent calc(var(--timeline-hour-height) / 2 + 1px),
      transparent var(--timeline-hour-height)
    );
}

/* Sticky weekday header row + sticky time column */
body.timetable-page .timeline-cols-head {
  position: sticky;
  top: 0;
  z-index: 5;
}

body.timetable-page .timeline-rail-head {
  position: sticky;
  top: 0;
  left: 0;
  z-index: 6;
}

body.timetable-page .timeline-rail {
  position: sticky;
  left: 0;
  z-index: 4;
  background-color: color-mix(in srgb, var(--surface-strong) 80%, transparent);
  backdrop-filter: blur(6px);
}

/* Today column header highlight */
body.timetable-page .timeline-day-head.tt-today {
  background: var(--accent-soft);
  box-shadow: inset 0 -2px 0 color-mix(in srgb, var(--accent) 45%, transparent);
}

/* Today column highlight (entire column) */
body.timetable-page .timeline-day.tt-today-col {
  background-color: color-mix(in srgb, var(--accent) 6%, var(--surface-strong));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
}

/* Hover highlight */
body.timetable-page .timeline-day.tt-hover-col {
  background-color: color-mix(in srgb, var(--surface-soft) 60%, transparent);
}

body.timetable-page .tt-hover-row {
  position: absolute;
  left: 0;
  right: 0;
  height: 28px;
  transform: translateY(-50%);
  pointer-events: none;
  background: color-mix(in srgb, var(--surface-soft) 40%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--border-strong) 60%, transparent);
  border-radius: 12px;
  z-index: 2;
  opacity: 0;
}

body.timetable-page .tt-hover-row.is-visible {
  opacity: 1;
}

/* Selection + drag previews */
body.timetable-page .tt-select-preview,
body.timetable-page .tt-drag-preview {
  position: absolute;
  left: 6px;
  right: 6px;
  border-radius: 14px;
  border: 2px solid color-mix(in srgb, var(--accent) 45%, transparent);
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  pointer-events: none;
  z-index: 3;
}

body.timetable-page .tt-drag-preview {
  border-color: color-mix(in srgb, var(--border-strong) 80%, transparent);
  background: color-mix(in srgb, var(--surface-soft) 40%, transparent);
}

/* Now line */
body.timetable-page .tt-now-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 999px;
  background: color-mix(in srgb, #ef4444 78%, var(--ink));
  box-shadow:
    0 0 0 4px rgba(239, 68, 68, 0.12),
    0 10px 24px rgba(239, 68, 68, 0.10);
  animation: tt-now-pulse 2.8s ease-in-out infinite;
  z-index: 4;
  pointer-events: none;
}

body.timetable-page .tt-now-line::after {
  content: "";
  position: absolute;
  left: -4px;
  top: 50%;
  width: 10px;
  height: 10px;
  transform: translateY(-50%);
  border-radius: 999px;
  background: rgba(239, 68, 68, 0.92);
  box-shadow: 0 0 0 5px rgba(239, 68, 68, 0.14);
}

body.timetable-page .tt-now-label {
  position: absolute;
  left: 8px;
  transform: translateY(-50%);
  font-size: 0.75rem;
  font-weight: 800;
  color: color-mix(in srgb, #991b1b 85%, var(--ink));
  z-index: 5;
  pointer-events: none;
  background: color-mix(in srgb, var(--surface-strong) 80%, transparent);
  border: 1px solid color-mix(in srgb, #ef4444 30%, var(--border-strong));
  border-radius: 999px;
  padding: 2px 8px;
}

@keyframes tt-now-pulse {
  0% {
    box-shadow:
      0 0 0 4px rgba(239, 68, 68, 0.10),
      0 10px 24px rgba(239, 68, 68, 0.08);
  }
  50% {
    box-shadow:
      0 0 0 6px rgba(239, 68, 68, 0.16),
      0 12px 28px rgba(239, 68, 68, 0.12);
  }
  100% {
    box-shadow:
      0 0 0 4px rgba(239, 68, 68, 0.10),
      0 10px 24px rgba(239, 68, 68, 0.08);
  }
}

@media (prefers-reduced-motion: reduce) {
  body.timetable-page .tt-now-line {
    animation: none;
  }
}

/* On phone/iPad day paging, keep absolute overlays aligned with the visible day. */
@media (max-width: 1024px) {
  body.timetable-page .tt-now-line {
    transform: translate3d(calc(var(--tt-day, 0) * 100%), 0, 0);
    transition: transform 0.22s ease;
  }

  body.timetable-page .tt-hover-row {
    transform: translate3d(calc(var(--tt-day, 0) * 100%), -50%, 0);
    transition: transform 0.22s ease;
  }
}

/* Tabs + actions clarity */
body.timetable-page .timetable-tab {
  position: relative;
}

body.timetable-page .timetable-tab-active::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 75%, transparent);
}

body.timetable-page .timetable-new-tab-btn {
  min-width: 0;
  font-weight: 900;
  letter-spacing: 0.01em;
}

body.timetable-page .tab-icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  font-size: 18px;
}

body.timetable-page .header-menu-toggle {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  font-size: 18px;
}

/* Global empty state overlay (shown only when a timetable has zero lessons) */
body.timetable-page .tt-empty-overlay {
  grid-column: 2;
  grid-row: 2;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 18px;
  pointer-events: none;
  z-index: 3;
}

body.timetable-page .tt-empty-card {
  max-width: 520px;
  width: min(520px, 94%);
  padding: 14px 16px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--surface-strong) 82%, transparent);
  border: 1px solid color-mix(in srgb, var(--border-strong) 75%, transparent);
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.10);
  color: var(--ink);
  font-weight: 800;
  line-height: 1.5;
  text-align: center;
}

/* Add/Edit modal duration chips */
body.timetable-page .tt-duration-chips {
  margin-top: 10px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 12px;
}

body.timetable-page .tt-duration-label {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--ink-muted);
}

body.timetable-page .tt-duration-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

body.timetable-page .tt-duration-chip {
  border: 1px solid var(--border-strong);
  background: var(--surface-strong);
  color: var(--accent-ink);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.12s ease;
}

body.timetable-page .tt-duration-chip:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border-strong));
  transform: translateY(-0.5px);
}

body.timetable-page .tt-duration-chip.is-active {
  background: color-mix(in srgb, var(--accent) 16%, var(--surface-strong));
  border-color: color-mix(in srgb, var(--accent) 70%, var(--border-strong));
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

/* Lesson modal UX improvements */
body.timetable-page .tt-lesson-summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--border-strong) 55%, transparent);
  background: color-mix(in srgb, var(--surface-strong) 82%, transparent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7), 0 10px 22px rgba(15, 23, 42, 0.08);
}

body.timetable-page .tt-lesson-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  margin-top: 6px;
  flex: 0 0 auto;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.14);
}

body.timetable-page .tt-lesson-summary-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

body.timetable-page .tt-lesson-summary-main {
  font-weight: 900;
  color: var(--accent-ink);
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

body.timetable-page .tt-lesson-summary-meta {
  font-size: 0.82rem;
  color: var(--ink-muted);
}

body.timetable-page .tt-day-picker > label {
  display: block;
  font-weight: 600;
  color: var(--ink);
}

body.timetable-page .tt-day-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

body.timetable-page .tt-day-chip {
  border: 1px solid var(--border-strong);
  background: var(--surface-strong);
  color: var(--accent-ink);
  border-radius: 999px;
  padding: 8px 10px;
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, transform 0.12s ease;
  min-width: 48px;
  text-align: center;
}

body.timetable-page .tt-day-chip:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border-strong));
  transform: translateY(-0.5px);
}

body.timetable-page .tt-day-chip.is-active {
  background: color-mix(in srgb, var(--accent) 16%, var(--surface-strong));
  border-color: color-mix(in srgb, var(--accent) 70%, var(--border-strong));
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

body.timetable-page .tt-lesson-advanced {
  border: 1px solid color-mix(in srgb, var(--border-strong) 55%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, #ffffff 70%, transparent);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

body.timetable-page .tt-lesson-advanced > summary {
  cursor: pointer;
  padding: 10px 12px;
  font-weight: 900;
  color: var(--accent-ink);
  background: color-mix(in srgb, var(--surface-soft) 78%, #ffffff);
  list-style: none;
}

body.timetable-page .tt-lesson-advanced > summary::-webkit-details-marker {
  display: none;
}

body.timetable-page .tt-lesson-advanced > summary::after {
  content: "▾";
  float: right;
  opacity: 0.8;
}

body.timetable-page .tt-lesson-advanced[open] > summary::after {
  content: "▴";
}

body.timetable-page .tt-lesson-advanced-body {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

body.timetable-page .tt-color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

body.timetable-page .tt-color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--border-strong) 65%, transparent);
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

body.timetable-page .tt-color-swatch.is-active {
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border-strong));
}

/* Lesson drag affordances */
body.timetable-page .timeline-lesson-block {
  cursor: grab;
  user-select: none;
}

/* Lesson card polish */
body.timetable-page .timeline-lesson-block {
  border-radius: 14px;
  padding: 10px 12px 12px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 14px 30px rgba(15, 23, 42, 0.10);
  border-width: 1px;
}

body.timetable-page .timeline-lesson-block::before {
  display: none;
}

body.timetable-page .timeline-lesson-block:hover {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    0 18px 42px rgba(15, 23, 42, 0.14);
}

body.timetable-page .timeline-lesson-block.is-dragging {
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.55),
    0 20px 46px rgba(15, 23, 42, 0.18);
}

body.timetable-page .timeline-lesson-block .timetable-slot-title {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding-right: 42px;
  font-weight: 900;
  font-size: 0.95rem;
  line-height: 1.2;
  white-space: normal;
  overflow: hidden;
}

body.timetable-page .timeline-lesson-block .timetable-slot-title-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--lesson-color);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.6);
  margin-top: 2px;
  flex: 0 0 auto;
}

body.timetable-page .timeline-lesson-block .timetable-slot-title-text {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  word-break: break-word;
}

body.timetable-page .timeline-lesson-block .timetable-slot-meta {
  font-size: 0.82rem;
  color: color-mix(in srgb, var(--ink) 55%, transparent);
}

body.timetable-page .timeline-lesson-block .timetable-slot-notes {
  font-size: 0.82rem;
  line-height: 1.35;
  background: color-mix(in srgb, #ffffff 55%, transparent);
  border-color: color-mix(in srgb, var(--border-strong) 70%, transparent);
}

body.timetable-page .timetable-slot-actions {
  top: 6px;
  right: 6px;
}

body.timetable-page .timetable-slot-menu-toggle {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  font-size: 16px;
}

body.timetable-page .timetable-slot-menu {
  min-width: 190px;
}

body.timetable-page .timeline-lesson-block.is-dragging {
  cursor: grabbing;
  opacity: 0.92;
}

body.timetable-page .tt-resize-handle {
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 6px;
  height: 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 20%, transparent);
  cursor: ns-resize;
}

/* Conflict marker */
body.timetable-page .timeline-lesson-block.tt-conflict {
  box-shadow:
    inset 0 0 0 2px color-mix(in srgb, #ef4444 70%, transparent),
    0 12px 24px rgba(15, 23, 42, 0.08);
}