/* ─── Sheet Area ─────────────────────────────── */
.sheet-area {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow-x: auto;
  overflow-y: hidden;
}

/* Column header row */
.col-headers {
  display: flex;
  border-bottom: 1px solid var(--header-border);
  background: var(--header-bg);
  flex-shrink: 0;
}
.ch-corner {
  width: var(--row-num-w);
  flex-shrink: 0;
  height: 20px;
  border-right: 1px solid var(--header-border);
  background: var(--header-bg);
}
.ch-cell {
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-chrome);
  font-size: 11px;
  color: var(--header-text);
  border-right: 1px solid var(--header-border);
  letter-spacing: 0.05em;
  font-weight: 500;
  overflow: hidden;
}
.ch-cell.col-a { width: var(--col-a-w); }
.ch-cell.col-b { width: var(--col-b-w); }
.ch-cell.col-c { width: var(--col-c-w); }
.ch-cell.col-d { width: var(--col-d-w); }
.ch-cell.col-e { flex: 1; }

/* Sheet body */
.sheet-body {
  flex: 1;
  overflow-y: auto;
  background-color: var(--cell-bg);
  /* Empty-cell grid: horizontal rows + vertical column dividers */
  background-image:
    repeating-linear-gradient(
      to bottom,
      transparent calc(var(--row-height) - 1px),
      #d0d0d0 calc(var(--row-height) - 1px),
      #d0d0d0 var(--row-height)
    ),
    linear-gradient(
      to right,
      transparent 41px, #d0d0d0 41px 42px,
      transparent 42px 151px, #d0d0d0 151px 152px,
      transparent 152px 431px, #d0d0d0 431px 432px,
      transparent 432px 527px, #d0d0d0 527px 528px,
      transparent 528px 867px, #d0d0d0 867px 868px,
      transparent 868px
    );
}

/* Subheader row (A / B / C / D labels) */
.subheader-row {
  display: flex;
  border-bottom: 2px solid #b0b0b0;
  background: #fafafa;
}
.sh-num {
  width: var(--row-num-w);
  flex-shrink: 0;
  height: var(--row-height);
  border-right: 1px solid var(--cell-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-chrome);
  font-size: 10.5px;
  color: var(--header-text);
  background: var(--header-bg);
}
/* Riley: darker subheader labels so they read as column labels, not placeholders */
.sh-cell {
  height: var(--row-height);
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-right: 1px solid var(--cell-border);
  font-family: var(--font-chrome);
  font-size: 11px;
  color: #555;
  letter-spacing: 0.04em;
  font-weight: 600;
  text-transform: uppercase;
}
.sh-cell.col-a { width: var(--col-a-w); }
.sh-cell.col-b { width: var(--col-b-w); }
.sh-cell.col-c { width: var(--col-c-w); }
.sh-cell.col-d { width: var(--col-d-w); }
.sh-cell.col-e { flex: 1; }

/* Data rows */
.data-row {
  display: flex;
  border-bottom: 1px solid var(--cell-border);
  cursor: pointer;
  transition: background-color 0.3s ease;
  align-items: stretch;
  min-height: var(--row-height);
  background-color: var(--cell-bg);
}
/* Chase: animate only newly added rows */
@keyframes rowSlideIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.data-row.row-new { animation: rowSlideIn 0.25s ease forwards; }
@keyframes rowFadeOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(10px); }
}
.data-row.row-removing { animation: rowFadeOut 0.18s ease forwards; pointer-events: none; }

/* Delete button */
.delete-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: #bbb;
  font-size: 13px;
  line-height: 1;
  padding: 4px 6px;
  border-radius: 2px;
}
.delete-btn:hover { color: #c0392b; background: #fff0f0; }
.data-row:hover .row-num {
  background: #e8e8e8;
}
.data-row.selected .row-num {
  background: #b8d4f5;
  color: #1973c4;
  font-weight: 700;
}
.data-row.selected {
  outline: 2px solid var(--cell-selected-border);
  outline-offset: -1px;
  z-index: 2;
  position: relative;
}

.row-num {
  width: var(--row-num-w);
  flex-shrink: 0;
  min-height: var(--row-height);
  border-right: 1px solid var(--cell-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-chrome);
  font-size: 11px;
  color: var(--header-text);
  background: var(--header-bg);
  transition: background 0.15s;
}

.cell {
  min-height: var(--row-height);
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-right: 1px solid var(--cell-border);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.cell.col-a {
  width: var(--col-a-w);
  font-family: var(--font-chrome);
  font-size: 11.5px;
  color: #777;
}
.cell.col-b {
  width: var(--col-b-w);
  font-family: var(--font-cell);
  font-size: 13px;
  color: #1a1a1a;
  letter-spacing: -0.01em;
  white-space: normal;
  word-break: break-word;
  text-overflow: unset;
  align-items: flex-start;
  padding-top: 7px;
  padding-bottom: 7px;
  line-height: 1.5;
}
.cell.col-c {
  width: var(--col-c-w);
  font-family: var(--font-chrome);
  font-size: 11.5px;
  justify-content: center;
}
.cell.col-d {
  width: var(--col-d-w);
  font-family: var(--font-cell);
  font-size: 12.5px;
  color: #444;
  font-style: italic;
  letter-spacing: -0.01em;
  white-space: normal;
  word-break: break-word;
  text-overflow: unset;
  align-items: flex-start;
  padding-top: 7px;
  padding-bottom: 7px;
  line-height: 1.5;
}
.cell.col-e { flex: 1; }

/* Emotion badge colors */
.emotion-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 2px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
}
.emo-joy      { background: #fef3c7; color: #92400e; }
.emo-sad      { background: #e0f2fe; color: #075985; }
.emo-stress   { background: #ffe4e6; color: #9f1239; }
.emo-anxiety  { background: #ede9fe; color: #5b21b6; }
.emo-tired    { background: #f3f4f6; color: #374151; }
.emo-calm     { background: #dcfce7; color: #14532d; }

/* Row tints */
.tint-joy      { background-color: var(--tint-joy); }
.tint-sad      { background-color: var(--tint-sad); }
.tint-stress   { background-color: var(--tint-stress); }
.tint-anxiety  { background-color: var(--tint-anxiety); }
.tint-tired    { background-color: var(--tint-tired); }
.tint-calm     { background-color: var(--tint-calm); }

/* Loading skeleton */
@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-bar {
  display: block;
  border-radius: 2px;
  background: linear-gradient(90deg, #ebebeb 25%, #f5f5f5 50%, #ebebeb 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
.skeleton-bar.badge { width: 52px; height: 20px; }
.skeleton-bar.line  { width: 85%; height: 13px; margin-top: 1px; }

/* ─── Empty State Hint ───────────────────────── */
.empty-state-hint {
  padding: 14px 16px 10px;
  font-family: var(--font-ui);
  font-size: 12px;
  color: #888;
  border-bottom: 1px dashed #e0e0e0;
}
.empty-state-hint kbd {
  background: #f0f0f0;
  border: 1px solid #ccc;
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 11px;
  font-family: var(--font-chrome);
}

/* ─── Error Toast ────────────────────────────── */
.error-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #2d2d2d;
  color: #fff;
  font-family: var(--font-ui);
  font-size: 12.5px;
  padding: 10px 20px;
  border-radius: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 9999;
  border-left: 3px solid #c0392b;
  max-width: 420px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.error-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.toast-retry {
  flex-shrink: 0;
  background: none;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  font-family: var(--font-ui);
  font-size: 11.5px;
  padding: 3px 8px;
  border-radius: 3px;
  cursor: pointer;
}
.toast-retry:hover { background: rgba(255,255,255,0.15); }

/* ─── Emotion Filter ─────────────────────────── */
.filter-header {
  position: relative;
  cursor: pointer;
  justify-content: center;
  gap: 4px;
  user-select: none;
}
.filter-header:hover { background: #e8e8e8; }
.filter-icon {
  font-size: 10px;
  color: #999;
  line-height: 1;
  transition: color 0.15s;
}
.filter-header.active .filter-icon {
  color: var(--ribbon-bg); /* green */
}
.filter-header.active {
  background: #e8f5ee;
}

.filter-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 110px;
  background: #fff;
  border: 1px solid var(--chrome-border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 100;
  border-radius: 2px;
  padding: 3px 0;
}
.filter-dropdown.open { display: block; }

.filter-option {
  padding: 5px 12px;
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--chrome-text);
  cursor: pointer;
  white-space: nowrap;
}
.filter-option:hover { background: #f0f0f0; }
.filter-option.selected {
  color: var(--ribbon-bg);
  font-weight: 600;
}

/* ─── Tab Content ────────────────────────────── */
.tab-content { display: none; flex: 1; min-height: 0; flex-direction: column; }
.tab-content.active { display: flex; }

/* ─── Stats Dashboard ───────────────────────── */
.stats-container {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
  background: var(--cell-bg);
}
.stats-header {
  font-family: var(--font-chrome);
  font-size: 13px;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 4px;
}
.stats-note {
  font-family: var(--font-chrome);
  font-size: 11px;
  color: #999;
  margin-bottom: 16px;
}
.stats-empty {
  padding: 32px 0;
  text-align: center;
  font-family: var(--font-ui);
  font-size: 13px;
  color: #aaa;
  line-height: 2;
}
.stats-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.stats-label {
  width: 80px;
  font-family: var(--font-chrome);
  font-size: 11.5px;
  color: #555;
  flex-shrink: 0;
}
.stats-bar-area {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}
.stats-bar-wrap {
  flex: 1;
  height: 14px;
  background: #f0f0f0;
  border-radius: 2px;
  overflow: hidden;
}
.stats-bar-fill {
  height: 100%;
  background: var(--ribbon-bg);
  border-radius: 2px;
  transition: width 0.4s ease;
}
.stats-pct {
  font-family: var(--font-chrome);
  font-size: 12px;
  font-weight: 600;
  color: var(--ribbon-bg);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}
.stats-insufficient {
  font-family: var(--font-chrome);
  font-size: 11px;
  color: #bbb;
  font-style: italic;
}
.stats-count {
  font-family: var(--font-chrome);
  font-size: 11px;
  color: #888;
  width: 80px;
  text-align: right;
  flex-shrink: 0;
}

/* ─── Feedback Buttons ───────────────────────── */
.feedback-mobile { display: none; }

.feedback-pair {
  display: flex;
  gap: 4px;
  align-items: center;
}

.feedback-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 3px;
  border-radius: 3px;
  color: #bbb;
  line-height: 0;
  transition: color 0.12s, background 0.12s;
}
.feedback-btn:hover { color: #666; background: #f0f0f0; }
.feedback-btn.selected-pos { color: #217346; background: #e8f5ee; }
.feedback-btn.selected-neg { color: #c0392b; background: #fff0f0; }
.feedback-btn.dim { color: #ddd; }
.feedback-btn.dim:hover { color: #999; background: #f5f5f5; }

/* ─── Emotion Edit (배지 클릭) ───────────────── */
.cell.col-c:has(.emotion-badge) { cursor: pointer; }
.cell.col-c:has(.emotion-badge):hover .emotion-badge { opacity: 0.75; }
.emotion-select-edit {
  max-width: 88px;
  border: 1px solid var(--cell-selected-border);
  border-radius: 2px;
  font-size: 11px;
  font-family: var(--font-ui);
  padding: 2px 4px;
  background: #fff;
  color: var(--chrome-text);
  outline: 2px solid var(--cell-selected-border);
  cursor: pointer;
}

/* ─── Date Tag (모바일에서만 표시) ────────────── */
.cell-date-tag { display: none; }

/* ─── Mobile Chat Layout (≤767px) ────────────── */
@media (max-width: 767px) {
  /* 컬럼 헤더: 유지하되 col-a/d/e 숨김 */
  .ch-corner { width: 30px; }
  .ch-cell.col-a, .ch-cell.col-d, .ch-cell.col-e { display: none; }
  .ch-cell.col-b { flex: 1; }
  .ch-cell.col-c { width: 72px; }

  .subheader-row { display: none; }

  /* 행: 수평 구조 유지 */
  .data-row { min-height: unset; }
  .row-num { width: 30px; font-size: 10px; }

  /* 숨길 컬럼 */
  .cell.col-a, .cell.col-d, .cell.col-e { display: none; }

  /* col-b: 채팅 버블처럼 */
  .cell.col-b {
    flex: 1;
    flex-direction: column;
    align-items: flex-start;
    min-height: 44px;
    padding: 7px 10px;
    font-size: 13px;
    white-space: normal;
    word-break: break-word;
    text-overflow: unset;
    line-height: 1.55;
    overflow: visible;
    border-right: 1px solid var(--cell-border);
  }

  /* col-c: 감정 배지 + 피드백 버튼 수직 배치 */
  .cell.col-c {
    width: 72px;
    flex-shrink: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    overflow: visible;
    padding: 6px 4px;
  }

  /* 날짜 태그 표시 */
  .cell-date-tag {
    display: block;
    font-size: 10px;
    color: #aaa;
    font-family: var(--font-chrome);
    margin-top: 4px;
    line-height: 1;
  }

  /* 삭제 버튼: col-e 숨김으로 자동 제거 */
  .delete-btn { display: none; }

  /* 피드백 버튼: col-c 안에 감정 배지 아래 */
  .feedback-mobile {
    display: flex;
    gap: 4px;
  }
  .feedback-mobile .feedback-btn {
    width: 26px;
    height: 26px;
    padding: 5px;
  }
}