:root{--bg:#f6f7fb;--panel:#fff;--ink:#172033;--muted:#69758d;--brand:#6557ff;--brand2:#18b6a7;--danger:#e04f5f;--line:#e4e8f1;--shadow:0 20px 60px rgba(23,32,51,.10)}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(circle at top left,#ebe9ff,transparent 32rem),var(--bg);color:var(--ink)}.app-shell{width:min(1180px,94vw);margin:auto;padding:32px 0}.hero{text-align:center;margin-bottom:22px}.eyebrow{color:var(--brand);font-weight:800;text-transform:uppercase;letter-spacing:.12em}.hero h1{font-size:clamp(2rem,5vw,4.2rem);line-height:1;margin:0}.hero p{color:var(--muted);font-size:1.08rem}.panel{background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:22px}.dropzone{border:2px dashed #bfc7dc;border-radius:22px;padding:34px;text-align:center;background:#fbfcff;transition:.2s;cursor:pointer}.dropzone.dragover,.dropzone:focus{border-color:var(--brand);background:#f0efff;outline:none}.drop-icon{font-size:42px;color:var(--brand)}.button,.preset{border:0;border-radius:999px;background:#eef1f7;color:var(--ink);padding:12px 18px;font-weight:800;cursor:pointer;transition:.2s}.button:hover,.preset:hover{transform:translateY(-1px)}.button:disabled{opacity:.45;cursor:not-allowed;transform:none}.primary{background:linear-gradient(135deg,var(--brand),#8a5cff);color:#fff}.danger{background:#fff0f2;color:var(--danger)}.message{margin-top:12px;color:var(--danger);font-weight:700}.controls-panel{margin-top:18px}.preset-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}.preset.active{background:#e9e7ff;color:var(--brand)}.controls-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.controls-grid label{display:grid;gap:8px;color:var(--muted);font-weight:700}.controls-grid input[type=range]{width:100%;accent-color:var(--brand)}.check{align-content:end;grid-template-columns:auto 1fr!important;color:var(--ink)!important}.toolbar{margin:18px 0;display:flex;gap:12px;align-items:center;flex-wrap:wrap}.color-label{margin-left:auto;font-weight:800;color:var(--muted);display:flex;align-items:center;gap:8px}.color-label input{width:46px;height:38px;border:0;background:transparent}.loader{padding:16px;text-align:center;font-weight:800;color:var(--brand)}.loader span{display:inline-block;width:16px;height:16px;border:3px solid #d8d4ff;border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}.comparison{display:grid;grid-template-columns:1fr 1fr;gap:18px}.preview-card h2{margin-top:0}.preview-box{min-height:420px;border-radius:18px;border:1px solid var(--line);background:linear-gradient(45deg,#fafafa 25%,transparent 25%),linear-gradient(-45deg,#fafafa 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#fafafa 75%),linear-gradient(-45deg,transparent 75%,#fafafa 75%);background-size:24px 24px;background-position:0 0,0 12px,12px -12px,-12px 0;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}.preview-box img,.preview-box svg{max-width:100%;max-height:70vh;display:block}.empty{color:var(--muted)}.coloring-region{cursor:pointer;transition:fill .12s}.coloring-region:hover{filter:drop-shadow(0 0 4px rgba(101,87,255,.7))}@media(max-width:860px){.controls-grid,.comparison{grid-template-columns:1fr}.toolbar{align-items:stretch}.toolbar .button{flex:1 1 42%}.color-label{margin-left:0}.preview-box{min-height:300px}.dropzone{padding:24px 14px}}
.control-group{display:flex;flex-direction:column;gap:6px}
.control-header{display:flex;justify-content:space-between;align-items:center;font-weight:700;color:var(--muted);font-size:.95rem}
.control-value{background:var(--brand);color:#fff;padding:2px 8px;border-radius:8px;font-size:.85rem;font-weight:800;min-width:32px;text-align:center}
.slider-container{display:flex;flex-direction:column;gap:2px}
.slider-limits{display:flex;justify-content:space-between;font-size:.75rem;color:#8c98ad;font-weight:600;margin-top:-2px}

.zoom-controls{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:14px;background:#f8f9fc;padding:6px;border-radius:12px;border:1px solid var(--line);width:fit-content;margin-left:auto;margin-right:auto;box-shadow:0 2px 8px rgba(23,32,51,.04)}
.zoom-btn{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:8px;border:1px solid transparent;background:transparent;color:var(--muted);cursor:pointer;transition:all .15s;padding:0;user-select:none}
.zoom-btn:hover:not(:disabled){background:rgba(101,87,255,.08);color:var(--brand)}
.zoom-btn:active:not(:disabled){background:rgba(101,87,255,.15);color:var(--brand)}
.zoom-btn:disabled{opacity:.35;cursor:not-allowed}
.zoom-percentage{font-size:.9rem;font-weight:700;color:var(--ink);min-width:54px;text-align:center;user-select:none}
.zoom-btn.font-btn{font-family:Inter,system-ui,-apple-system,sans-serif;font-weight:800;font-size:.85rem}
.sync-container{display:flex;justify-content:center;margin-top:18px;margin-bottom:-6px}
.zoom-wrapper{position:absolute;left:0;top:0;transform-origin:0 0;will-change:transform}
.zoom-transition{transition:transform .18s cubic-bezier(0.2, 0.8, 0.2, 1)}

@media(max-width:860px){
  .zoom-btn{width:44px;height:44px}
  .zoom-controls{padding:8px;gap:8px}
  .sync-container{margin-top:12px;margin-bottom:6px}
}

/* Tabs styling */
.tabs-container {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  justify-content: center;
}
.tab-btn {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 12px 28px;
  font-weight: 800;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(23,32,51,.03);
}
.tab-btn:hover {
  color: var(--brand);
  border-color: var(--brand);
  transform: translateY(-1px);
}
.tab-btn.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  box-shadow: 0 8px 24px rgba(101,87,255,.25);
}

/* Visibility toggles based on active tab */
.app-shell.tab-single-active .mode-batch {
  display: none !important;
}
.app-shell.tab-batch-active .mode-single {
  display: none !important;
}

/* Batch input field for prefix */
.batch-naming-container {
  margin-bottom: 20px;
}
.batch-naming-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.batch-naming-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: opacity 0.2s ease;
}
.batch-naming-group.disabled {
  opacity: 0.55;
  pointer-events: none;
}
.check.disabled {
  opacity: 0.45;
  pointer-events: none;
}
.batch-naming-label {
  font-weight: 800;
  color: var(--muted);
  font-size: 0.95rem;
}
.input-text {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  background: #fbfbfc;
  transition: all 0.15s ease;
}
.input-text:focus {
  outline: none;
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(101,87,255,.1);
}

/* Batch list panel & table styles */
.batch-list-panel {
  margin-top: 18px;
}
.batch-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 12px;
}
.batch-table th, .batch-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
.batch-table th {
  background: #fdfdfe;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.9rem;
}
.batch-table tbody tr {
  transition: background 0.15s ease;
}
.batch-table tbody tr:hover:not(.empty-row) {
  background: rgba(246, 247, 251, 0.5);
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 99px;
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.status-badge.pending {
  background: #f0f2f6;
  color: var(--muted);
}
.status-badge.processing {
  background: rgba(101, 87, 255, 0.08);
  color: var(--brand);
}
.status-badge.processing::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border: 2px solid rgba(101, 87, 255, 0.3);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
.status-badge.completed {
  background: rgba(24, 182, 167, 0.08);
  color: var(--brand2);
}
.status-badge.error {
  background: rgba(224, 79, 95, 0.08);
  color: var(--danger);
  max-width: 250px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Table Responsive wrapper */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
}
.batch-progress-container {
  display: flex;
  align-items: center;
  padding: 16px;
  background: rgba(101, 87, 255, 0.03);
  border: 1px dashed var(--line);
  border-radius: 16px;
}
.batch-progress-bar-wrapper {
  background: #eef1f7;
  border-radius: 99px;
  height: 12px;
  flex: 1;
  overflow: hidden;
  position: relative;
  margin-right: 12px;
}
.batch-progress-bar {
  width: 0%;
  background: linear-gradient(135deg, var(--brand), #8a5cff);
  height: 100%;
  transition: width 0.3s ease;
}
.batch-progress-percent {
  font-weight: 800;
  color: var(--brand);
  min-width: 40px;
  text-align: right;
}

/* Action button in table */
.batch-btn-download {
  padding: 6px 14px;
  font-size: 0.85rem;
  background: var(--brand);
  color: white;
  border: none;
  font-weight: 800;
  border-radius: 8px;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}
.batch-btn-download:hover {
  background: #5042e5;
  transform: translateY(-1px);
}
.batch-btn-download:disabled, .batch-btn-download.disabled {
  opacity: 0.4;
  pointer-events: none;
  background: #eef1f7;
  color: var(--muted);
  transform: none;
  cursor: not-allowed;
}

@media(max-width: 860px) {
  .tabs-container {
    flex-direction: column;
    gap: 8px;
  }
  .tab-btn {
    width: 100%;
    padding: 12px;
  }
  .batch-naming-grid {
    grid-template-columns: 1fr;
  }
  .batch-table th, .batch-table td {
    padding: 10px 12px;
  }
  .status-badge.error {
    max-width: 140px;
  }
}

/* Language switcher styling */
.header-toolbar {
  display: flex;
  justify-content: flex-end;
  width: 100%;
  margin-bottom: -16px;
  padding: 0 16px;
}
.language-switcher-container {
  display: inline-block;
}
.language-select {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(23,32,51,.04);
  font-family: inherit;
  font-size: 0.9rem;
  outline: none;
  transition: all 0.2s ease;
}
.language-select:hover {
  border-color: var(--brand);
  box-shadow: 0 4px 16px rgba(101,87,255,.12);
}
@media(max-width: 860px) {
  .header-toolbar {
    justify-content: center;
    margin-bottom: 8px;
  }
}