*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-0: #08080a;
  --bg-1: #0e0e12;
  --bg-2: #151519;
  --bg-3: #1c1c22;
  --bg-4: #25252d;
  --border: #2a2a34;
  --border-hover: #3a3a48;
  --text-0: #f0ece4;
  --text-1: #b8b4aa;
  --text-2: #78756c;
  --accent: #e07a2f;
  --accent-dim: #e07a2f33;
  --accent-hover: #f08a3f;
  --red: #d44;
  --green: #5a8;
  --font-mono: 'JetBrains Mono', monospace;
  --font-sans: 'Plus Jakarta Sans', sans-serif;
  --radius: 8px;
  --radius-sm: 5px;
}

html, body {
  height: 100%;
  background: var(--bg-0);
  color: var(--text-0);
  font-family: var(--font-sans);
  font-size: 14px;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* Layout */
.app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-1);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  color: var(--bg-0);
}

.logo-text {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.5px;
}

.logo-text span {
  color: var(--text-2);
  font-weight: 400;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-3);
  color: var(--text-1);
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn:hover { border-color: var(--border-hover); color: var(--text-0); background: var(--bg-4); }
.btn:active { transform: scale(0.97); }

.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-0);
  font-weight: 600;
}
.btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--bg-0); }
.btn-accent:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

.btn-icon {
  padding: 6px 8px;
  font-size: 16px;
  line-height: 1;
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
}
.btn-ghost:hover { background: var(--bg-3); border-color: transparent; }

.btn-danger { color: var(--red); }
.btn-danger:hover { background: #d4432218; border-color: #d4432244; color: var(--red); }

/* Main content */
.main {
  display: flex;
  overflow: hidden;
}

/* Panel shared */
.panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 180px;
}

.panel:last-child { flex: 1; }

/* Panel resize handles */
.panel-resize-handle {
  width: 5px;
  flex-shrink: 0;
  background: var(--border);
  cursor: col-resize;
  position: relative;
  transition: background 0.15s;
}

.panel-resize-handle:hover,
.panel-resize-handle.active {
  background: var(--accent);
}

.panel-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  background: var(--bg-1);
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-2);
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  background: var(--bg-0);
}

/* Images panel */
.drop-zone {
  margin: 12px;
  padding: 32px 16px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.drop-zone-icon {
  font-size: 28px;
  margin-bottom: 8px;
  opacity: 0.5;
}

.drop-zone-text {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

.drop-zone-text strong {
  color: var(--accent);
}

.image-count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
}

.image-list {
  padding: 4px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.image-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.1s;
}

.image-item:hover { background: var(--bg-3); }
.image-item.selected { background: var(--accent-dim); }

.image-thumb {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
  background: var(--bg-3);
}

.image-info {
  flex: 1;
  min-width: 0;
}

.image-name {
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.image-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-2);
  margin-top: 2px;
}

.image-remove {
  opacity: 0;
  background: none;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  font-size: 16px;
  padding: 2px;
  transition: all 0.1s;
}
.image-item:hover .image-remove { opacity: 1; }
.image-remove:hover { color: var(--red); }

/* Pipeline panel */
.pipeline-panel .panel-body {
  background: var(--bg-1);
}

.pipeline-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  text-align: center;
  color: var(--text-2);
  gap: 12px;
  height: 100%;
}

.pipeline-empty-icon {
  font-size: 32px;
  opacity: 0.3;
}

.pipeline-steps {
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pipeline-step {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s;
}

.pipeline-step:hover { border-color: var(--border-hover); }
.pipeline-step.dragging { opacity: 0.5; border-style: dashed; }
.pipeline-step.drag-target { border-color: var(--accent); border-style: dashed; }

.step-header {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  gap: 8px;
  user-select: none;
}

.step-grip {
  color: var(--text-2);
  font-size: 14px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  cursor: grab;
  padding: 4px 2px;
  border-radius: 3px;
  transition: color 0.15s, background 0.15s;
}

.step-grip:hover {
  color: var(--text-0);
  background: var(--bg-4);
}

.step-grip:active { cursor: grabbing; }

.step-number {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-dim);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
}

.step-name {
  flex: 1;
  font-size: 13px;
  font-weight: 600;
}

.step-toggle {
  background: none;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  padding: 2px;
  font-size: 14px;
  transition: transform 0.2s;
}
.step-toggle.open { transform: rotate(180deg); }

.step-remove {
  background: none;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  padding: 2px;
  font-size: 14px;
  transition: color 0.1s;
}
.step-remove:hover { color: var(--red); }

.step-config {
  padding: 0 12px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.step-config.collapsed { display: none; }

/* Form controls */
.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-row {
  display: flex;
  gap: 8px;
  align-items: end;
}

.field-row .field { flex: 1; }

label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-2);
}

input[type="text"],
input[type="number"],
select {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 10px;
  background: var(--bg-0);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-0);
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

input:focus, select:focus { border-color: var(--accent); }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-4);
  border-radius: 2px;
  outline: none;
  margin: 6px 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg-0);
}

input[type="color"] {
  -webkit-appearance: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 30px;
  padding: 2px;
  background: var(--bg-0);
  cursor: pointer;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 3px; }

.range-value {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  min-width: 36px;
  text-align: right;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toggle-switch {
  position: relative;
  width: 36px;
  height: 20px;
  cursor: pointer;
}

.toggle-switch input { display: none; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-4);
  border-radius: 10px;
  transition: background 0.2s;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-2);
  top: 3px;
  left: 3px;
  transition: all 0.2s;
}

.toggle-switch input:checked + .toggle-slider { background: var(--accent); }
.toggle-switch input:checked + .toggle-slider::after { left: 19px; background: var(--bg-0); }

.seg-control {
  display: flex;
  background: var(--bg-0);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}

.seg-btn {
  flex: 1;
  padding: 5px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  background: transparent;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.seg-btn:not(:last-child) { border-right: 1px solid var(--border); }
.seg-btn.active { background: var(--accent-dim); color: var(--accent); }
.seg-btn:hover:not(.active) { color: var(--text-0); }

/* Add step area */
.add-step-area {
  border-top: 1px solid var(--border);
  background: var(--bg-1);
  max-height: 240px;
  overflow-y: auto;
}

.step-group {
  border-bottom: 1px solid var(--border);
}

.step-group:last-child { border-bottom: none; }

.step-group-header {
  display: flex;
  align-items: center;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-2);
  background: var(--bg-0);
  position: sticky;
  top: 0;
  z-index: 1;
}

.step-group-items {
  display: flex;
  flex-wrap: wrap;
  padding: 6px 8px;
  gap: 3px;
}

.add-step-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 9px;
  background: var(--bg-2);
  border: 1px solid transparent;
  border-radius: 20px;
  color: var(--text-1);
  font-size: 11px;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.add-step-btn:hover {
  border-color: var(--accent);
  color: var(--text-0);
  background: var(--accent-dim);
}

.add-step-btn .icon { font-size: 11px; }

/* Preview panel */
.preview-panel .panel-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--bg-0);
  position: relative;
}

.preview-empty {
  color: var(--text-2);
  text-align: center;
  font-size: 13px;
  line-height: 1.6;
}

.preview-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.preview-image-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-2);
  background-image:
    linear-gradient(45deg, var(--bg-3) 25%, transparent 25%),
    linear-gradient(-45deg, var(--bg-3) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--bg-3) 75%),
    linear-gradient(-45deg, transparent 75%, var(--bg-3) 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
  position: relative;
  min-height: 0;
}

.preview-image-wrap img, .preview-image-wrap canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.preview-tabs {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.preview-tab {
  flex: 1;
  padding: 6px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.15s;
}

.preview-tab.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.preview-info {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-2);
  flex-shrink: 0;
}

.preview-badge {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 3px;
}

/* Compare view */
.compare-wrap {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  cursor: col-resize;
}

.compare-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.compare-layer canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.compare-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  z-index: 10;
  pointer-events: none;
}

.compare-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-0);
  box-shadow: 0 2px 8px #0006;
}

.compare-divider::after {
  content: '◂ ▸';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10px;
  color: var(--bg-0);
  font-weight: 700;
  letter-spacing: -1px;
  z-index: 1;
  pointer-events: none;
}

.compare-label {
  position: absolute;
  top: 10px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 4px;
  z-index: 5;
  pointer-events: none;
}

.compare-label-original {
  left: 10px;
  background: var(--bg-0);
  color: var(--text-2);
  border: 1px solid var(--border);
}

.compare-label-processed {
  right: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent);
}

/* Footer */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-top: 1px solid var(--border);
  background: var(--bg-1);
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-stat {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-2);
}

.footer-stat strong {
  color: var(--text-0);
}

.footer-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Progress overlay */
.progress-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: #000a;
  z-index: 100;
  align-items: center;
  justify-content: center;
}

.progress-overlay.active { display: flex; }

.progress-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 40px;
  text-align: center;
  min-width: 320px;
}

.progress-title {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 16px;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: var(--bg-4);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.3s;
  width: 0%;
}

.progress-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-2);
}

/* Presets dropdown */
.presets-dropdown {
  position: relative;
}

.presets-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 4px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 220px;
  z-index: 50;
  box-shadow: 0 8px 24px #0008;
  overflow: hidden;
}

.presets-menu.open { display: block; }

.presets-menu-header {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
}

.preset-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 13px;
}

.preset-item:hover { background: var(--bg-3); }

.preset-delete {
  background: none;
  border: none;
  color: var(--text-2);
  cursor: pointer;
  font-size: 14px;
  padding: 0 2px;
  opacity: 0;
}
.preset-item:hover .preset-delete { opacity: 1; }
.preset-delete:hover { color: var(--red); }

.presets-menu-footer {
  padding: 8px 12px;
  border-top: 1px solid var(--border);
}

.save-preset-row {
  display: flex;
  gap: 4px;
}

.save-preset-row input {
  flex: 1;
  font-size: 12px;
  padding: 5px 8px;
}

.no-presets {
  padding: 16px 12px;
  text-align: center;
  color: var(--text-2);
  font-size: 12px;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.pipeline-step { animation: fadeIn 0.2s ease; }

/* Responsive helpers */
.hidden { display: none !important; }

/* Web components — transparent to layout */
batch-range-slider,
batch-segmented-control,
batch-toggle-switch,
batch-step-item { display: contents; }