/* App shell, grid, containers, responsive */

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--sp-4);
  min-height: 100dvh;
}

/* Header */
.header {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  margin-bottom: var(--sp-4);
  box-shadow: var(--shadow-sm);
  border-top: 4px solid;
  border-image: linear-gradient(90deg, #4A8ED9, #B5A878, #FFE633, #FFB8CF, #8B5C3A, #D8E2F0, #2D6B1E, #DBB08A) 1;
}

.header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.header__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.header__week-label {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text);
  min-width: 180px;
  text-align: center;
}

/* Progress */
.progress {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.progress__info {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.progress__label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.progress__pct {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--blue);
}

.progress__track {
  height: 6px;
  background: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__fill {
  height: 100%;
  background: linear-gradient(90deg, #4A8ED9, #2D6B1E, #D4B830);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 400ms var(--ease);
}

.progress__fill--done {
  background: linear-gradient(90deg, #2D6B1E, #4A8ED9, #D4B830);
}

/* Filters */
.filters {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}

/* Weekly grid */
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--sp-3);
  align-items: start;
}

/* Day column */
.day-col {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.day-col--weekend {
  background: var(--weekend-bg);
}

.day-col--today .day-col__header {
  background: var(--blue);
  color: #fff;
}

.day-col__header {
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

/* Per-day colored headers */
.day-col:nth-child(1) .day-col__header { background: #D8E2F0; color: #2C4A6E; } /* Mon - lavender */
.day-col:nth-child(2) .day-col__header { background: #E0D9C0; color: #5C4A1E; } /* Tue - olive */
.day-col:nth-child(3) .day-col__header { background: #FFF3B0; color: #6B5A10; } /* Wed - yellow */
.day-col:nth-child(4) .day-col__header { background: #FFD9E6; color: #7A3045; } /* Thu - pink */
.day-col:nth-child(5) .day-col__header { background: #F0DCC4; color: #6B3E1F; } /* Fri - peach */
.day-col:nth-child(6) .day-col__header { background: #D6EACD; color: #2D5A1E; } /* Sat - green */
.day-col:nth-child(7) .day-col__header { background: #E0D3C0; color: #5C3A1E; } /* Sun - brown */

.day-col__header .day-label__full {
  display: inline;
}

.day-col__header .day-label__short {
  display: none;
}

.day-col__body {
  padding: var(--sp-2);
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.day-col__empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: var(--text-xs);
  padding: var(--sp-6) var(--sp-2);
}

/* Mobile collapse toggle */
.day-col__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  padding: var(--sp-1);
  line-height: 1;
  transition: transform var(--duration) var(--ease);
}

.day-col__toggle--collapsed {
  transform: rotate(-90deg);
}

/* ── Month grid ─────────────────────────── */
.grid--month {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.month-grid__header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: linear-gradient(90deg, #D8E2F0, #E0D9C0, #FFF3B0, #FFD9E6, #F0DCC4, #D6EACD, #E0D3C0);
  border-bottom: 1px solid var(--border);
}

.month-grid__dow {
  padding: var(--sp-3) var(--sp-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.month-grid__row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 1px solid var(--border-light);
}

.month-cell {
  min-height: 110px;
  padding: var(--sp-3);
  cursor: pointer;
  transition: background var(--duration) var(--ease);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.month-cell:last-child {
  border-right: none;
}

.month-cell:hover {
  background: var(--blue-light);
}

.month-cell--today {
  background: #D8E2F0;
}

.month-cell--today .month-cell__date {
  background: var(--blue);
  color: #fff;
  border-radius: 2px;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.month-cell--weekend {
  background: var(--weekend-bg);
}

.month-cell--weekend:hover {
  background: #D0CABC;
}

.month-cell--outside {
  opacity: 0.35;
}

.month-cell--expanded {
  background: var(--blue-light);
  box-shadow: inset 0 -2px 0 var(--blue);
}

.month-cell--dragover {
  background: var(--blue-light);
  outline: 2px dashed var(--blue);
  outline-offset: -2px;
}

.month-cell__date {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--text);
  line-height: 1;
}

.month-cell__tasks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  align-items: center;
  margin-top: auto;
}

.month-cell__more {
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
}

/* Expanded day detail */
.month-detail {
  padding: var(--sp-5) var(--sp-6);
  background: var(--bg);
  border-bottom: 1px solid var(--border-light);
  animation: monthDetailIn 200ms var(--ease);
}

@keyframes monthDetailIn {
  from {
    opacity: 0;
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
  }
  to {
    opacity: 1;
    max-height: 500px;
  }
}

.month-detail__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-3);
}

.month-detail__date {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--text);
}

.month-detail__count {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.month-detail__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

/* Responsive */
@media (max-width: 1100px) {
  .day-col__header .day-label__full {
    display: none;
  }
  .day-col__header .day-label__short {
    display: inline;
  }
}

@media (max-width: 768px) {
  .app {
    padding: var(--sp-2);
  }

  .grid:not(.grid--month) {
    grid-template-columns: 1fr;
    gap: var(--sp-2);
  }

  .day-col {
    min-height: unset;
  }

  .day-col__header {
    cursor: pointer;
  }

  .day-col__toggle {
    display: block;
  }

  .day-col__body--collapsed {
    display: none;
  }

  .day-col__header .day-label__full {
    display: inline;
  }

  .day-col__header .day-label__short {
    display: none;
  }

  /* Compact header */
  .header {
    padding: var(--sp-3);
    margin-bottom: var(--sp-2);
  }

  .header__top {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--sp-2);
    margin-bottom: var(--sp-2);
  }

  .header__title {
    font-size: var(--text-base);
  }

  .header__nav {
    gap: var(--sp-1);
    flex-wrap: wrap;
  }

  .header__week-label {
    min-width: unset;
    font-size: var(--text-xs);
  }

  /* Smaller nav buttons on mobile */
  .header__nav .btn--icon {
    width: 28px;
    height: 28px;
  }

  .header__nav .btn--icon svg {
    width: 16px;
    height: 16px;
  }

  .header__nav .btn--small {
    padding: 2px var(--sp-2);
    font-size: 0.65rem;
  }

  .header__nav .sticker-book-btn,
  .header__nav .ai-planner-btn {
    padding: 2px var(--sp-2);
    font-size: var(--text-xs);
  }

  .header__nav .view-toggle__btn {
    padding: 2px var(--sp-2);
    font-size: 0.65rem;
  }

  /* Compact progress */
  .progress {
    gap: var(--sp-1);
  }

  .progress__track {
    height: 4px;
  }

  /* Compact filters */
  .filters {
    margin-bottom: var(--sp-2);
    gap: var(--sp-1);
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .filters::-webkit-scrollbar {
    display: none;
  }

  .filter-pill {
    white-space: nowrap;
    flex-shrink: 0;
    padding: 2px var(--sp-2);
    font-size: var(--text-xs);
  }

  /* Month grid mobile */
  .month-cell {
    min-height: 56px;
    padding: var(--sp-1);
  }

  .month-cell__date {
    font-size: var(--text-xs);
  }

  .month-cell--today .month-cell__date {
    width: 20px;
    height: 20px;
    border-radius: 2px;
  }

  .month-detail {
    padding: var(--sp-3);
  }
}