/* 사진 콜라주 만들기 전용 스타일 */

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

.dropzone {
  background: var(--surface);
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 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; }

/* 썸네일 바 */
.thumbs-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 0.85rem;
}

.bar-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
  white-space: nowrap;
}

.thumbs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  flex: 1;
}

.thumb {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
}
.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.thumb-num {
  position: absolute;
  top: 2px;
  left: 2px;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.05rem 0.3rem;
  border-radius: 999px;
  pointer-events: none;
}
.thumb-x {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  font-size: 0.7rem;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: background 0.15s;
}
.thumb-x:hover {
  background: var(--error);
}

.btn-clear {
  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;
}
.btn-clear:hover {
  border-color: var(--error);
  color: var(--error);
}

/* 설정 바 */
.config-bar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 0.95rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1rem;
}

.cfg-block {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cfg-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
}

/* 레이아웃 그리드 */
.layout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.45rem;
}

.layout-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.45rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.layout-btn:hover {
  border-color: var(--primary);
}
.layout-btn.active {
  border-color: var(--primary);
  background: rgba(102, 126, 234, 0.1);
}

.layout-mini {
  display: grid;
  width: 38px;
  height: 38px;
  gap: 2px;
}
.layout-mini-cell {
  background: var(--text-sub);
  border-radius: 2px;
  opacity: 0.55;
}
.layout-btn.active .layout-mini-cell {
  background: var(--primary);
  opacity: 1;
}

.layout-label {
  font-size: 0.72rem;
  color: var(--text-sub);
  font-weight: 600;
}
.layout-btn.active .layout-label {
  color: var(--primary);
}

/* 사이즈 행 */
.size-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.size-btn {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--bg);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.size-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.size-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 색상·간격·반경 */
.cfg-row {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 0.85rem;
  align-items: end;
}

.cfg-cell {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.cfg-cell input[type="color"] {
  width: 50px;
  height: 32px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
}

.cfg-cell input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

/* 미리보기 */
.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;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

#preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
}

/* 다운로드 */
.result-actions {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.btn-primary {
  padding: 0.7rem 1.4rem;
  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) {
  .cfg-row { grid-template-columns: 1fr; }
  .layout-grid { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .layout-mini { width: 32px; height: 32px; }
  .layout-label { font-size: 0.68rem; }
  .preview-stage { padding: 0.5rem; }
}