.planner-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.planner-header h2 {
  font-weight: 900;
  margin-bottom: 4px;
}

.planner-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(220px, 1fr));
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.planner-row::-webkit-scrollbar {
  height: 8px;
}

.planner-row::-webkit-scrollbar-thumb {
  background: rgba(100, 116, 139, 0.18);
  border-radius: 999px;
}

.session-tile {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, #ffffff 0%, #fcfdff 100%);
  padding: 16px;
  min-height: 248px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  scroll-snap-align: start;
  box-shadow: var(--shadow-xs);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast),
    background var(--transition-fast);
}

.session-tile.current {
  border-color: rgba(5, 150, 105, 0.22);
  background: linear-gradient(180deg, #ffffff 0%, #f7fefb 100%);
  box-shadow:
    0 0 0 5px rgba(209, 250, 229, 0.72),
    0 18px 40px rgba(5, 150, 105, 0.12);
  transform: translateY(-2px);
}

.session-tile.completed {
  border-color: rgba(22, 163, 74, 0.16);
  background: linear-gradient(180deg, #ffffff 0%, #f6fdf8 100%);
}

.session-tile.locked {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  opacity: 0.88;
}

.tile-title {
  font-weight: 900;
  margin: 4px 0;
  letter-spacing: -0.02em;
}

.tile-meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.checkmark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--line);
  font-size: 16px;
  font-weight: 900;
  margin-right: 8px;
  flex: 0 0 auto;
  color: var(--muted);
  background: #ffffff;
}

.checkmark.done {
  border-color: var(--success);
  color: var(--success);
  background: #ffffff;
}

.history-chip {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
  background: #f8fafc;
  border-radius: 999px;
  padding: 6px 10px;
  border: 1px solid var(--line);
}

.planner-scroll-note {
  display: none;
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
}

@media (max-width: 960px) {
  .planner-row {
    grid-template-columns: repeat(4, minmax(252px, 82vw));
    gap: 12px;
    padding-bottom: 10px;
  }

  .planner-scroll-note {
    display: block;
  }
}

@media (max-width: 640px) {
  .planner-row {
    grid-template-columns: repeat(4, minmax(260px, 88vw));
    gap: 10px;
  }

  .session-tile {
    min-height: 224px;
  }
}