/* One-page app layout: fixed image pane on the left, scrolling steps on the right. */

/* Grainy gradients: soft sand, sage and teal glows under a film-grain texture. Kept faint. */
:root {
  --viewer-bg:
    var(--grain-soft),
    radial-gradient(55% 60% at 4% 70%, rgba(92, 160, 145, 0.42), transparent 72%),
    radial-gradient(55% 50% at 60% 0%, rgba(214, 190, 128, 0.55), transparent 72%),
    radial-gradient(45% 45% at 70% 70%, rgba(190, 195, 140, 0.40), transparent 72%),
    radial-gradient(45% 55% at 100% 100%, rgba(36, 64, 59, 0.28), transparent 72%),
    #dfded6;
  --header-bg:
    var(--grain),
    radial-gradient(70% 120% at 0% 0%, rgba(214, 190, 128, 0.50), transparent 70%),
    radial-gradient(55% 110% at 100% 10%, rgba(92, 160, 145, 0.32), transparent 70%),
    var(--surface);
}

html, body { height: 100%; }
body { overflow: hidden; }

.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 400px);
  height: 100vh;
  height: 100dvh;
}

/* Left: image pane. Never scrolls. */
.viewer {
  position: relative;
  overflow: hidden;
  background: var(--viewer-bg);
  min-height: 0;
  display: flex;
  flex-direction: column;
}
/* The image area; the controls bar sits below it. */
.stage {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
}
.viewer canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.viewer canvas[hidden] { display: none; }
#view { cursor: crosshair; touch-action: none; }
#view.is-pan { cursor: grab; }
#view.is-grabbing { cursor: grabbing; }

/* Image pane controls (ruler), in a strip below the image. */
.viewer-bar {
  flex: 0 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  padding: 0.5rem 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
}
.viewer-bar[hidden], .viewer-bar [hidden] { display: none; }
.zoom { font-weight: 400; gap: 0.25rem; }
.link-button {
  min-height: 2rem;
  padding: 0.15rem 0.4rem;
  border: 0;
  background: transparent;
  color: var(--accent-strong);
  cursor: pointer;
  font-weight: 600;
  border-radius: 999px;
}
.link-button:hover:not(:disabled) { background: rgba(29, 38, 36, 0.06); }
.link-button:disabled { color: var(--muted); opacity: 0.5; cursor: default; }
.viewer-bar-item { display: flex; align-items: center; gap: 0.4rem; font-weight: 600; }
.segmented {
  display: inline-flex;
  gap: 2px;
  padding: 2px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface-raised);
  font-weight: 400;
}
.segmented button {
  min-width: 2.5rem;
  min-height: 1.9rem;
  padding: 0.1rem 0.7rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s;
}
.segmented button:hover:not(:disabled) { background: rgba(29, 38, 36, 0.07); }
.segmented button:disabled { color: var(--muted); opacity: 0.45; cursor: not-allowed; }
.segmented button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--accent);
  font-weight: 600;
}
.viewer-bar-hint { color: var(--muted); padding-right: 0.35rem; }

.drop-zone {
  position: absolute;
  inset: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  border: 1.5px dashed var(--border-strong);
  border-radius: 18px;
  background: transparent;
  cursor: pointer;
  text-align: center;
  padding: 1rem;
  transition: border-color 0.15s, background-color 0.15s;
}
.drop-zone:hover, .drop-zone:focus-visible { border-color: var(--text); background: rgba(250, 250, 247, 0.3); }
.drop-zone[hidden] { display: none; }
.drop-title { font-family: var(--font-display); font-size: 1.3rem; font-weight: 600; }

.drop-overlay {
  position: absolute;
  inset: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1.5px dashed var(--text);
  border-radius: 18px;
  background: rgba(214, 190, 128, 0.40);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  pointer-events: none;
}
.drop-overlay[hidden] { display: none; }

/* Right: steps. Scrolls on its own. */
.steps {
  overflow-y: auto;
  background: var(--surface);
  border-left: 1px solid var(--border);
  min-height: 0;
}
.steps-header {
  padding: 1.6rem 1.25rem 1.25rem;
  background: var(--header-bg);
}
.steps-header h1 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}
.steps-header p { margin: 0; font-size: 0.9rem; color: #4f514a; }

.step {
  padding: 1rem 1.25rem 1.25rem;
  border-top: 1px solid var(--border);
}
.step h2 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
}
.step p { margin: 0 0 0.75rem; }
.step p:last-child { margin-bottom: 0; }
.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--ink);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
}
.step.is-pending .step-no { background: var(--border-strong); color: var(--surface); }
.step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.hint { font-size: 0.875rem; color: var(--muted); }
.hint.is-error { color: var(--danger); }
.step.is-pending h2, .step.is-pending .check { color: var(--muted); }

.check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.25rem;
  margin-bottom: 0.25rem;
  cursor: pointer;
}
.check input { width: 1.1rem; height: 1.1rem; margin: 0; accent-color: var(--accent-strong); }
.check:has(input:disabled) { cursor: default; }
.check.is-disabled { color: var(--muted); }

/* Adjust step: rotate and flip side by side, wrapping on narrow panes. */
.adjust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.5rem;
}
.adjust-row .segmented { align-self: flex-start; }

.scale-fields { margin: 0.25rem 0 0.75rem; }
.scale-fields[hidden] { display: none; }
.size-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.size-row .times { padding-bottom: 0.45rem; color: var(--muted); }
.size-row input[type="number"] { width: 6.5rem; }

.advanced summary {
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--muted);
  padding: 0.25rem 0;
  width: fit-content;
}
.advanced summary:hover { color: var(--text); }
.advanced[open] summary { margin-bottom: 0.5rem; }
.advanced input[type="number"] { width: 8rem; }

.export-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.export-row select { min-height: 2.5rem; }

.viewer.is-busy::after {
  content: "Working…";
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 0.9rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
}

/* Mobile: image on top at a fixed height, steps scroll below. */
@media (max-width: 760px) {
  .app {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 50vh minmax(0, 1fr);
    grid-template-rows: 50dvh minmax(0, 1fr);
  }
  .viewer-bar { padding: 0.35rem 12px; gap: 0.35rem 0.6rem; }
  .viewer-bar-hint { display: none; }
  .steps { border-left: 0; border-top: 1px solid var(--border); }
  .steps-header, .step { padding-left: 16px; padding-right: 16px; }
}