:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #e3e6ea;
  --text: #1b1f24;
  --muted: #6b7280;
  --accent: #f6821f;         /* Cloudflare orange */
  --accent-ink: #ffffff;
  --danger: #c0362c;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --card: #171b21;
    --border: #2a2f37;
    --text: #e8eaed;
    --muted: #9aa3af;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 12px 30px rgba(0,0,0,.35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 40px;
}

.hero { text-align: center; margin-bottom: 28px; }
.hero h1 {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  letter-spacing: -0.02em;
}
.scissors { color: var(--accent); }
.tagline { margin: 0 auto; max-width: 46ch; color: var(--muted); }

/* Dropzone */
.dropzone {
  background: var(--card);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 44px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s ease, background .15s ease, transform .05s ease;
  box-shadow: var(--shadow);
}
.dropzone:hover { border-color: var(--accent); }
.dropzone:focus-visible { outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent); outline-offset: 2px; }
.dropzone.drag { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--card)); }
.dz-icon { color: var(--accent); }
.dz-title { margin: 12px 0 4px; font-weight: 600; }
.dz-title span { font-weight: 400; color: var(--muted); }
.dz-hint { margin: 0; font-size: .875rem; color: var(--muted); }
.dz-hint kbd {
  font: inherit;
  font-size: .8em;
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg);
  color: var(--text);
}

/* Result */
.result { margin-top: 24px; }
.panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 620px) { .panels { grid-template-columns: 1fr; } }

.panel { margin: 0; }
.panel figcaption {
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin-bottom: 8px;
}
.stage {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  background: var(--card);
}
.stage img { max-width: 100%; max-height: 100%; display: block; }

.checker {
  background-image:
    linear-gradient(45deg, #c9ced6 25%, transparent 25%),
    linear-gradient(-45deg, #c9ced6 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #c9ced6 75%),
    linear-gradient(-45deg, transparent 75%, #c9ced6 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
}
@media (prefers-color-scheme: dark) {
  .checker {
    background-image:
      linear-gradient(45deg, #333a44 25%, transparent 25%),
      linear-gradient(-45deg, #333a44 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #333a44 75%),
      linear-gradient(-45deg, transparent 75%, #333a44 75%);
  }
}

/* Lasso overlay */
.sel-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  overscroll-behavior: contain;
  cursor: crosshair;
  z-index: 5;
}
#beforeStage.selecting { cursor: crosshair; }
#beforeStage img {
  user-select: none;
  -webkit-user-drag: none;
}
.sel-caption {
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 6;
  margin: 0;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.62);
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .01em;
  pointer-events: none;
}
.selbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
}
.selbar .hint { flex: 1 1 240px; margin: 0; color: var(--muted); font-size: .9rem; }

/* Spinner */
.spinner { position: absolute; inset: 0; display: grid; place-items: center; }
.spinner span {
  width: 34px; height: 34px;
  border: 3px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Actions */
.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 10px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform .05s ease, background .15s ease, border-color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn.ghost:hover { border-color: var(--accent); }
.webp-toggle { color: var(--muted); font-size: .9rem; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }

/* Error */
.error {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--danger) 12%, var(--card));
  border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent);
  color: var(--danger);
  font-size: .93rem;
}

.foot {
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 18px;
  text-align: center;
  color: var(--muted);
  font-size: .82rem;
}
.foot strong { color: var(--text); font-weight: 600; }