:root {
  --bg: #0b0e11;
  --panel: #12161c;
  --panel-2: #1a2029;
  --line: #232b36;
  --text: #e8edf2;
  --muted: #93a1af;
  --accent: #2dd4bf;
  --accent-ink: #04231e;
  --danger: #f87171;
  --radius: 12px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
}

img { max-width: 100%; }
button { font: inherit; cursor: pointer; }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

/* Nav */
.nav { border-bottom: 1px solid var(--line); }
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.brand-mark { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 24px; }
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.nav-links a:hover { color: var(--text); }

/* Hero */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 24px 32px;
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: start;
}
.hero-copy h1 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  font-weight: 700;
}
.hero-sub {
  color: var(--muted);
  font-size: 17px;
  margin: 0 0 20px;
  max-width: 38ch;
}
.engine-line {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 12px;
  display: inline-block;
}
.engine-line strong { color: var(--accent); font-weight: 600; }

/* Tool */
.tool {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.dropzone {
  border: 1.5px dashed #34404e;
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  color: var(--muted);
  transition: border-color 0.2s, background-color 0.2s;
}
.dropzone:hover, .dropzone:focus-visible, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(45, 212, 191, 0.05);
  outline: none;
}
.dropzone:active { transform: scale(0.995); }
.dz-icon { width: 34px; height: 34px; color: var(--accent); }
.dz-title { color: var(--text); font-weight: 550; margin: 10px 0 4px; }
.dz-hint { font-size: 13px; margin: 0; }

.controls {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 14px 2px 2px;
  flex-wrap: wrap;
}
.control { display: flex; align-items: center; gap: 10px; }
.control-right { margin-left: auto; gap: 8px; }
.control-label { font-size: 13px; color: var(--muted); }

.seg {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.seg-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 6px 16px;
  font-size: 14px;
  font-weight: 550;
}
.seg-btn.active {
  background: var(--accent);
  color: var(--accent-ink);
}

.print-controls {
  border-top: 1px solid var(--line);
  margin-top: 12px;
  padding-top: 14px;
  gap: 14px;
}
.print-controls[hidden] { display: none; }
.num-input {
  width: 76px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.num-input:focus { outline: none; border-color: var(--accent); }
.num-input.attention { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.18); }
.num-input-wide { width: 68px; }
.unit { font-size: 13px; color: var(--muted); }
.lock-icon { width: 18px; height: 18px; color: var(--muted); flex-shrink: 0; }
.print-hint {
  flex-basis: 100%;
  font-size: 12.5px;
  color: var(--muted);
}

select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-size: 14px;
}

.btn {
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: #46e0cc; }
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}
.btn-ghost:hover { color: var(--text); border-color: #34404e; }

/* Model status */
.model-status { padding: 12px 2px 2px; }
.model-status-text { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.bar {
  height: 6px;
  background: var(--panel-2);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.15s ease;
}

/* Queue */
.queue { list-style: none; margin: 0; padding: 0; }
.queue-item {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 2px;
  border-top: 1px solid var(--line);
  margin-top: 12px;
}
.queue:empty { display: none; }
.q-thumb {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--panel-2);
}
.q-name {
  font-size: 14px;
  font-weight: 550;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 40ch;
}
.q-meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}
.q-meta.error { color: var(--danger); }
.q-bar { margin-top: 8px; max-width: 340px; }
.q-actions { display: flex; gap: 8px; align-items: center; }
.q-actions .btn { padding: 6px 12px; font-size: 13px; }
.q-remove {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 18px;
  line-height: 1;
  padding: 4px 6px;
}
.q-remove:hover { color: var(--danger); }

/* Viewer */
.viewer-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
.viewer-title {
  font-size: 20px;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
}
.viewer {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
.viewer-stage {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  user-select: none;
  touch-action: none;
  background:
    repeating-conic-gradient(#161b22 0% 25%, #10141a 0% 50%) 0 0 / 24px 24px;
}
.viewer-stage img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
}
.before-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.before-wrap img {
  width: 100%;
  height: 100%;
  image-rendering: auto;
}
.divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  cursor: ew-resize;
}
.divider:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.divider-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: flex;
  align-items: center;
  justify-content: center;
}
.divider-handle svg { width: 18px; height: 18px; }
.tag {
  position: absolute;
  top: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(11, 14, 17, 0.75);
  color: var(--text);
}
.tag-before { left: 10px; }
.tag-after { right: 10px; }
.viewer-meta {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  color: var(--muted);
  padding-top: 12px;
}

/* Info */
.info {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 64px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.info h2 {
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 12px;
}
.info p {
  color: var(--muted);
  font-size: 15px;
  max-width: 58ch;
  margin: 0 0 12px;
}

/* Footer */
.footer {
  border-top: 1px solid var(--line);
  max-width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}
.footer a { color: var(--muted); }
.footer a:hover { color: var(--text); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 28px; padding-top: 36px; }
  .info { grid-template-columns: 1fr; gap: 28px; }
  .queue-item { grid-template-columns: 44px 1fr; }
  .q-actions { grid-column: 1 / -1; justify-content: flex-end; }
  .q-thumb { width: 44px; height: 44px; }
  .nav-links { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}