* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  background: #0f1115;
  color: #f0f0f0;
}

.site-header {
  text-align: center;
  padding: 32px 16px 16px;
}

.site-header h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.subtitle {
  color: #aaa;
  max-width: 600px;
  margin: 0 auto;
  font-size: 0.95rem;
  line-height: 1.5;
}

.container {
  max-width: 660px;
  margin: 0 auto;
  padding: 16px;
}

/* 탭 */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid #2a2d36;
  padding-bottom: 0;
}

.tab {
  padding: 10px 14px;
  border-radius: 8px 8px 0 0;
  border: none;
  background: transparent;
  color: #888;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  white-space: nowrap;
}

.tab:hover { color: #ccc; background: #1a1d24; }
.tab.active { color: #6c8eff; border-bottom-color: #6c8eff; background: transparent; }

/* 패널 */
.panel { display: none; }
.panel.active { display: block; }

.panel-desc {
  color: #aaa;
  font-size: 0.9rem;
  margin: 0 0 16px;
}

.caution {
  font-size: 0.85rem;
  color: #e0b84b;
  background: #2a2200;
  border: 1px solid #5a4a00;
  border-radius: 8px;
  padding: 10px 14px;
  margin: 0 0 16px;
}

/* 업로드 영역 */
.upload-area {
  border: 2px dashed #444;
  border-radius: 12px;
  padding: 40px 16px;
  text-align: center;
  cursor: pointer;
  position: relative;
  transition: border-color 0.2s;
}

.upload-area:hover,
.upload-area.drag-over { border-color: #6c8eff; }

.upload-area input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.upload-area p { margin: 0; color: #aaa; font-size: 0.95rem; pointer-events: none; }

/* 파일 목록 */
.file-list {
  list-style: none;
  padding: 0;
  margin: 12px 0;
}

.file-list li {
  padding: 6px 10px;
  background: #1a1d24;
  border-radius: 6px;
  margin-bottom: 4px;
  font-size: 0.85rem;
  color: #ccc;
  display: flex;
  justify-content: space-between;
}

.file-name {
  font-size: 0.85rem;
  color: #6c8eff;
  margin: 8px 0;
  word-break: break-all;
}

/* 옵션 */
.scale-label, .range-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  color: #ccc;
  margin: 12px 0;
}

select {
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #444;
  background: #1a1d24;
  color: #fff;
  font-size: 0.9rem;
}

input[type="text"] {
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid #444;
  background: #1a1d24;
  color: #fff;
  font-size: 0.9rem;
  width: 100%;
}

.split-options { margin-bottom: 4px; }
.page-info { font-size: 0.85rem; color: #aaa; margin: 0 0 8px; }

.hint {
  font-size: 0.78rem;
  color: #e0b84b;
}

/* 버튼 */
button {
  margin-top: 12px;
  padding: 12px 20px;
  border-radius: 8px;
  border: none;
  background: #6c8eff;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
}

button:hover { background: #5577e0; }
button:disabled { background: #333; color: #666; cursor: not-allowed; }

/* 진행률 */
.progress-wrap {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

progress {
  flex: 1;
  height: 8px;
  border-radius: 4px;
}

/* 결과 */
.result { margin-top: 20px; }

.download-btn {
  display: block;
  text-align: center;
  padding: 12px 20px;
  background: #3ddc84;
  color: #06250f;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
}

.download-btn:hover { background: #2cc070; }

.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.img-grid a { display: block; }
.img-grid img {
  width: 100%;
  border-radius: 6px;
  border: 1px solid #333;
  display: block;
}
.img-grid span {
  display: block;
  font-size: 0.75rem;
  color: #888;
  text-align: center;
  margin-top: 2px;
}

.multi-links { display: flex; flex-direction: column; gap: 8px; }

.site-footer {
  text-align: center;
  padding: 24px 16px 40px;
  color: #777;
  font-size: 0.8rem;
}

.site-footer a { color: #9ab2ff; }
.site-footer nav { margin-bottom: 8px; }