/**
 * Middle Pane: Rock-Solid CSS Grid Timetable Styling - Subtle Neumorphism
 * 
 * Direct 1:1 Unified Grid Architecture:
 * - Row 1: Header (40px)
 * - Rows 2, 3, 4: Periods 1, 2, 3 (minmax(80px, 1fr) on PC, stretched to screen bottom)
 * - Row 5: Lunch Break (38px)
 * - Rows 6, 7, 8, 9: Periods 4, 5, 6, 7 (minmax(80px, 1fr) on PC, stretched to screen bottom)
 * 
 * Every normal period row has identical height.
 * Left time blocks and right day cells share the exact same row, guaranteeing perfect alignment.
 * Super periods (*4, *5, *7) are displayed by physical size expansion.
 * Top bar padding and sizes streamlined so credits count never wraps to 2 lines.
 */

.calendar-top-bar {
  padding: 8px 14px;
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-shrink: 0;
}

.term-selector {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.term-chip {
  padding: 5px 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface-variant);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--neumorph-flat);
  transition: var(--transition-smooth);
  white-space: nowrap;
}

.term-chip:hover {
  background-color: var(--md-sys-color-surface);
  box-shadow: var(--neumorph-hover);
}

.term-chip.active {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-color: var(--md-sys-color-primary);
  box-shadow: var(--neumorph-raised);
}

/* Grayscale Credit Meter - Soft Sunken Recess, Never Wraps to 2 Lines */
.credit-stats-bar {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.grayscale-credit-meter {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--md-sys-color-on-surface-variant);
  background-color: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  box-shadow: var(--neumorph-inset);
  white-space: nowrap;
  flex-shrink: 0;
}

.grayscale-credit-meter strong {
  color: var(--md-sys-color-on-surface);
}

.grayscale-credit-meter .sep {
  opacity: 0.35;
}

.calendar-actions {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
}

.calendar-actions .m3-button {
  padding: 5px 12px;
  font-size: 11.5px;
  white-space: nowrap;
}

/* Scroll View: Flex Column so Grid Stretches to Bottom on PC */
.timetable-scroll-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: auto;
  background-color: var(--md-sys-color-background);
  padding-bottom: 28px; /* Space for super period 7 and comfortable scrolling */
}

/* Unified Grid Table: 7 Columns (Time + Mon..Sat), 9 Rows (Header + P1..P3 + Lunch + P4..P7)
   On PC, minmax(80px, 1fr) stretches the rows proportionally to fill screen bottom */
.timetable-grid-table {
  flex: 1;
  min-height: 638px;
  display: grid;
  grid-template-columns: 104px repeat(6, minmax(110px, 1fr));
  grid-template-rows: 40px repeat(3, minmax(80px, 1fr)) 38px repeat(4, minmax(80px, 1fr));
  min-width: 824px;
  background-color: var(--md-sys-color-surface);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  box-sizing: border-box;
}

/* Sticky Header Cells */
.grid-header-cell {
  background-color: var(--md-sys-color-surface);
  border-bottom: 2px solid var(--md-sys-color-outline-variant);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  position: sticky;
  top: 0;
  z-index: 20;
}

.time-header {
  color: var(--md-sys-color-outline);
  left: 0;
  z-index: 30; /* Corner cell stays pinned on both axes */
}

.day-header .sub-kanji {
  font-size: var(--font-size-xs);
  color: var(--md-sys-color-outline);
  font-weight: 400;
  margin-left: 2px;
}

/* Time Block Cells (Column 1, Rows 2-9) */
.time-block-cell {
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 4px 6px;
  text-align: center;
  box-sizing: border-box;
  position: sticky;
  left: 0;
  z-index: 15;
}

.time-block-cell.lunch-time-block {
  background-color: var(--color-lunch-bg);
}

.p-num {
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--md-sys-color-primary);
  line-height: 1.2;
}

.p-time {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.2;
}

/* Timetable Cells (Day Columns 2-7, Rows 2-9) */
.timetable-cell {
  position: relative;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface);
  box-sizing: border-box;
  overflow: visible; /* Allows super periods to expand across adjacent boundaries */
  transition: background-color 0.15s ease;
}

.timetable-cell.cell-drop-active {
  background-color: rgba(39, 39, 42, 0.08);
}

[data-theme="dark"] .timetable-cell.cell-drop-active {
  background-color: rgba(244, 244, 245, 0.09);
}

/* Lunch Cells */
.timetable-cell.lunch-cell {
  background-color: var(--color-lunch-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.lunch-label {
  font-size: 11px;
  font-weight: 500;
  color: var(--md-sys-color-outline);
  font-style: italic;
  opacity: 0.7;
}

/* Cell Cards Wrapper */
.cell-cards-wrapper {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  gap: 4px;
  padding: 2px;
  box-sizing: border-box;
  overflow: visible;
}

.cell-cards-wrapper.multi-cards {
  gap: 3px;
}

/* Course Card Base - Subtle Tactile Neumorphic Lift */
.calendar-card {
  flex: 1;
  min-width: 0;
  height: 100%;
  position: relative;
  border-radius: var(--radius-xs);
  background-color: var(--card-bg-normal);
  border: 1px solid var(--card-border-normal);
  border-left: 3px solid var(--card-accent-normal);
  box-shadow: var(--neumorph-card);
  cursor: pointer;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  overflow: hidden;
  z-index: 5;
}

.calendar-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--neumorph-hover);
  filter: brightness(0.99);
  z-index: 12;
}

/* Super Period Base */
.calendar-card.card-super,
.calendar-card.card-super-p4,
.calendar-card.card-super-p5,
.calendar-card.card-super-p7 {
  background-color: var(--card-bg-normal);
  border-color: var(--card-border-normal);
  border-left: 3px solid var(--card-accent-super);
  box-shadow: var(--neumorph-raised);
}

/* Physical Size Expansions for Super Periods (Proportional) */
/* Super Period 4 (13:20 - 15:15): starts 32px up in Lunch row, ends at bottom of Period 4 */
.calendar-card.card-super-p4 {
  margin-top: -32px;
  height: calc(100% + 32px);
  z-index: 10;
}

/* Super Period 5 (15:25 - 17:20): starts at Period 5, extends 45% down into Period 6 */
.calendar-card.card-super-p5 {
  align-self: flex-start;
  height: 145%;
  z-index: 10;
}

/* Super Period 7 (18:15 - 20:10): starts at Period 7, extends 45% down past Period 7 */
.calendar-card.card-super-p7 {
  align-self: flex-start;
  height: 145%;
  z-index: 10;
}

/* PE Activity Card */
.calendar-card.card-pe {
  background-color: var(--card-bg-normal);
  border-color: var(--card-border-normal);
  border-left: 3px solid var(--card-accent-pe);
  box-shadow: var(--neumorph-card);
}

/* Conflict Card */
.calendar-card.card-conflict {
  background-color: var(--card-bg-normal);
  border: 1px dashed var(--card-border-conflict);
  border-left: 3px solid var(--card-border-conflict);
}

/* Card Content Layout */
.card-content {
  padding: 5px 7px;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-sizing: border-box;
}

.card-header-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
}

.card-header-line .code {
  font-size: 11px;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: 6px;
  padding: 1px 5px;
  box-shadow: var(--neumorph-flat);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
  display: inline-block;
  max-width: calc(100% - 24px);
}

.btn-card-del {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--md-sys-color-outline);
  line-height: 1;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-xs);
  transition: var(--transition-smooth);
}

.btn-card-del:hover {
  color: var(--md-sys-color-on-surface);
  background-color: rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .btn-card-del:hover {
  background-color: rgba(255, 255, 255, 0.12);
}

.card-title-line {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  line-height: 1.25;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  margin: 1px 0;
  word-break: break-word;
}

/* Super cards have more vertical height, allowing up to 4 lines */
.card-super-p4 .card-title-line,
.card-super-p5 .card-title-line,
.card-super-p7 .card-title-line,
.card-super .card-title-line {
  -webkit-line-clamp: 4;
}

.card-footer-line {
  display: flex;
  align-items: center;
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

.card-footer-line .prof {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.card-header-line .badge-custom {
  font-size: 9px;
  font-weight: 700;
  text-transform: uppercase;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary, #ffffff);
  padding: 1px 4px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.3px;
  margin-left: auto;
  margin-right: 4px;
}

.ela-unplaced-banner {
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11.5px;
  color: var(--md-sys-color-on-surface-variant);
  flex-shrink: 0;
}

.ela-unplaced-chip {
  background-color: var(--md-sys-color-surface);
  border: 1px dashed var(--md-sys-color-primary);
  color: var(--md-sys-color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 11px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.ela-unplaced-chip:hover {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary, #ffffff);
}

/* =========================================================
 * Mobile Mode Timetable Styles (STRICTLY <= 768px)
 * Fixed 80px rows for natural touch scrolling, no screen-stretching
 * ========================================================= */
@media (max-width: 768px) {
  .calendar-top-bar {
    padding: 6px 10px;
    gap: 6px;
    flex-wrap: wrap;
  }

  .term-chip {
    padding: 4px 10px;
    font-size: 11px;
  }

  .grayscale-credit-meter {
    padding: 4px 10px;
    font-size: 10.5px;
    gap: 5px;
  }

  .calendar-actions .m3-button {
    padding: 4px 8px;
    font-size: 11px;
  }

  .timetable-scroll-container {
    display: block;
    padding-bottom: 20px;
  }

  .timetable-grid-table {
    flex: none;
    min-height: auto;
    grid-template-rows: 40px repeat(3, 80px) 38px repeat(4, 80px);
    min-width: 660px;
    grid-template-columns: 84px repeat(6, minmax(92px, 1fr));
  }

  .time-block-cell {
    padding: 2px 4px;
  }

  .time-block-cell .p-time {
    font-size: 10px;
  }
}

@media (max-width: 480px) {
  .grayscale-credit-meter .sep {
    display: none;
  }
}