/* 사진 인스타 그리드 분할 전용 스타일 */

nav { max-width: 980px; }
main { max-width: 980px; }

.dropzone {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 2.2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  margin-bottom: 1rem;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.drag-over {
  border-color: var(--primary);
  background-color: rgba(102, 126, 234, 0.04);
  outline: none;
}
.dz-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-sub);
}
.dz-icon { font-size: 2.2rem; }
.dz-line { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.dz-sub { font-size: 0.82rem; }

/* 설정 바 */
.config-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 0.85rem;
}
.cfg-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-right: 0.2rem;
}
.modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}
.mode-btn {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
  font-variant-numeric: tabular-nums;
}
.mode-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.mode-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-clear {
  margin-left: auto;
  padding: 0.4rem 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.btn-clear:hover {
  border-color: var(--text-sub);
  color: var(--text);
}

/* 미리보기 */
.preview-wrap {
  margin-bottom: 1rem;
}
.preview-stage {
  background: repeating-conic-gradient(#e5e7eb 0% 25%, #f9fafb 0% 50%) 50% / 24px 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview-frame {
  position: relative;
  max-width: 100%;
  max-height: 60vh;
  width: 600px;
  background: #000;
  overflow: hidden;
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
}
#preview-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 격자 오버레이 */
.grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.grid-line {
  position: absolute;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
}
.grid-line.h { left: 0; right: 0; height: 2px; transform: translateY(-1px); }
.grid-line.v { top: 0; bottom: 0; width: 2px; transform: translateX(-1px); }

.grid-num {
  position: absolute;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 0.3rem 0.45rem;
}
.grid-num span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 0.4rem;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  border-radius: 999px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

.preview-info {
  margin-top: 0.6rem;
  padding: 0.5rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-sub);
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  text-align: center;
}

/* 셀 카드 */
.cells-wrap {
  margin-bottom: 1rem;
}
.hint {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: #b45309;
  padding: 0.6rem 0.95rem;
  border-radius: 9px;
  font-size: 0.85rem;
  margin-bottom: 0.85rem;
}
.hint b {
  color: #92400e;
  font-weight: 800;
}

.cells-grid {
  display: grid;
  gap: 0.5rem;
}
.cell-card {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
}
.cell-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.cell-num {
  position: absolute;
  top: 6px;
  left: 6px;
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
.cell-dl {
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid var(--border);
  transition: background 0.15s, color 0.15s;
}
.cell-dl:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 다운로드 액션 */
.result-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}
.btn-primary {
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 700;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  border-radius: 9px;
  cursor: pointer;
  transition: filter 0.15s;
  font-family: inherit;
}
.btn-primary:hover {
  filter: brightness(1.08);
}

@media (max-width: 600px) {
  .preview-frame { width: 100%; }
  .btn-clear { margin-left: 0; width: 100%; }
}