/* ──────────────────────────────────────────────────────────────────────────
 * App layout — Pawfectly Yours
 *
 * Top-level structure:
 *   .editor-shell
 *     .ph-header                     (top, full width — defined in Header.css)
 *     .editor-body                   (flex row)
 *       .canvas-area                 (flex: 1)
 *         .canvas-area__stage        (the Konva canvas frame, fills space)
 *         .canvas-area__bottom-bar   (absolute, pinned to bottom)
 *           .canvas-area__toolbar    (left of the bar; desktop, when selected)
 *           .canvas-area__right-stack  (right cluster, stacked vertically)
 *             .canvas-area__history  (undo/redo pill, on top)
 *             .canvas-area__zoom     (zoom+snap pill, below)
 *       .right-panel-wrap            (fixed width, desktop only)
 *
 * On mobile the right panel becomes a bottom-sheet modal, the element
 * toolbar is pinned to the TOP of the canvas area (via .mobile-toolbar-wrap,
 * NOT via .canvas-area__bottom-bar), .canvas-area__bottom-bar flips to
 * static positioning to flow below the stage with the history + zoom
 * pills centered, and a FAB toggles the sheet.
 * ────────────────────────────────────────────────────────────────────────── */

.editor-shell {
  /* Definite viewport height — see the #root comment in index.css for
   * why this is `height` and not `min-height`. Removed the prior
   * `flex: 1` because with #root now `height: 100vh`, editor-shell
   * being its only child means a height-of-100vh matches naturally;
   * `flex: 1` + `min-height: 100vh` together used to coexist as
   * "grow to fill #root, but at least 100vh," which let the box stretch
   * past 100vh when content pushed for more. */
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  overflow: hidden;
}

.editor-body {
  flex: 1;
  display: flex;
  align-items: stretch;
  gap: 0.75rem;
  padding: 0 0.75rem 0.75rem;
  min-height: 0;
  overflow: hidden;
}

/* ── Canvas area ─────────────────────────────────────────────────────────── */

.canvas-area {
  position: relative;
  flex: 1;
  display: flex;
  align-items: stretch;
  justify-content: center;
  min-width: 0;
  min-height: 0;
}

.canvas-area__stage {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  min-width: 0;
}

/* Element toolbar + zoom/snap controls sit inside a shared bottom bar
 * (.canvas-area__bottom-bar) that's pinned to the bottom of canvas-area.
 * Bundling them into a single absolute-positioned flex row — instead
 * of having each one independently `position: absolute` — means they
 * can't collide as the canvas-area narrows: the previous implementation
 * had the toolbar at left:1rem and zoom at right:1rem, and once
 * canvas-area dipped below ~880px (toolbar 380 + zoom ~150 + gaps) they
 * overlapped. The bar's flex layout keeps them spaced cleanly and on a
 * single horizontal line until the narrow-screen media query flips
 * them to stacked.
 *
 * pointer-events trick: the bar visually spans the full canvas width,
 * but the user must be able to click through the empty middle to drag
 * elements near the bottom of the canvas. Setting `pointer-events: none`
 * on the bar and re-enabling it on the toolbar / zoom children gives us
 * that pass-through. */
.canvas-area__bottom-bar {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 10;
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  pointer-events: none;
}

.canvas-area__toolbar {
  width: min(100%, 380px);
  pointer-events: auto;
}

/* History pill (undo/redo) and zoom pill share a vertical stack
 * wrapper on the right side of the bottom bar, with history sitting
 * ABOVE zoom. The previous layout had them side-by-side in a single
 * flex row — which read as "undo/redo is a secondary affordance
 * attached to zoom". Stacking gives undo/redo its own visual weight
 * (the more important of the two for editing flow) and is the
 * standard hierarchy used by Figma / Sketch / Adobe Express.
 *
 * `margin-left: auto` lives on the stack wrapper, not the children,
 * so the whole cluster gets pushed to the right edge whether the
 * left-side toolbar is present or not. `align-items: flex-end`
 * keeps both pills right-aligned within the column even if they
 * differ in width (history is 2 buttons, zoom is 4 — zoom is
 * naturally wider). The narrow-screen and mobile breakpoints below
 * flatten this back to a row to avoid eating extra vertical space
 * when the bar is already in column mode.
 *
 * pointer-events: none on the wrapper, auto on the children — same
 * pass-through pattern as the parent bottom bar. The wrapper has no
 * pixels of its own; the pills inside accept the clicks. */
.canvas-area__right-stack {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-left: auto;
  align-items: flex-end;
  pointer-events: none;
}

.canvas-area__history {
  pointer-events: auto;
}

.canvas-area__zoom {
  pointer-events: auto;
}

/* ── Right panel ─────────────────────────────────────────────────────────── */

.right-panel-wrap {
  width: var(--right-panel-width);
  flex-shrink: 0;
  background: var(--brand-cream);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* ── Export toast ────────────────────────────────────────────────────────── */
/* Floats above the canvas in the top-left corner so it doesn't compete with
 * the toolbar (bottom-left) or zoom controls (bottom-right). */

.export-toast-wrap {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 12;
  pointer-events: none;
  /* When the canvas hint is shown it occupies top-left too; the hint hides
   * itself once an element is selected, and the export toast only appears
   * during/after a save action — they rarely overlap visually. */
}

.export-toast {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  pointer-events: auto;
  /* Shared keyframe in index.css — see S13 utility section. */
  animation: fade-up-in 0.18s ease-out;
}

.export-toast--progress {
  border-color: var(--brand-pink);
  color: var(--brand-pink-strong);
}

.export-toast--success {
  border-color: #bbf7d0;
  background: #f0fdf4;
  color: #15803d;
}

.export-toast--error {
  border-color: #fecaca;
  background: #fef2f2;
  color: #b91c1c;
}

.export-toast__link {
  color: inherit;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.export-toast__close {
  background: transparent;
  border: none;
  font-size: 14px;
  cursor: pointer;
  color: inherit;
  padding: 0 0 0 0.25rem;
  line-height: 1;
}

/* ── App-wide toast (replaces alert() calls) ─────────────────────────────── */
/* Centered at the top of the canvas area, distinct from the export-toast
 * which sits in the top-left. Auto-dismisses after a few seconds; the user
 * can also dismiss manually with the close button. Three kinds matching
 * the export-toast color language so the warning vocabulary stays
 * consistent: success = green, error = red, info = brand pink. */

.app-toast-wrap {
  position: absolute;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 13;
  pointer-events: none;
  max-width: calc(100% - 2rem);
}

.app-toast {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  pointer-events: auto;
  animation: app-toast-in 0.18s ease-out;
  max-width: 100%;
}

.app-toast > span {
  /* Wrap long messages (e.g. the share-fallback URL toast) instead of
   * letting them stretch the toast off-screen. */
  word-break: break-word;
  overflow-wrap: anywhere;
}

@keyframes app-toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(-4px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.app-toast--success { border-color: #bbf7d0; background: #f0fdf4; color: #15803d; }
.app-toast--error   { border-color: #fecaca; background: #fef2f2; color: #b91c1c; }
.app-toast--info    { border-color: var(--brand-pink); background: var(--brand-pink-soft); color: var(--brand-pink-strong); }

.app-toast__close {
  background: transparent;
  border: none;
  font-size: 14px;
  cursor: pointer;
  color: inherit;
  padding: 0 0 0 0.25rem;
  line-height: 1;
}

@media (max-width: 768px) {
  .app-toast-wrap {
    top: calc(var(--header-height-mobile) + 0.6rem);
    width: calc(100% - 1rem);
  }
  .app-toast {
    width: 100%;
    justify-content: center;
  }
}

/* ── FAB (mobile only) ───────────────────────────────────────────────────── */

.app-fab {
  position: fixed;
  right: 1rem;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  z-index: 700;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  border: none;
  background: var(--brand-pink);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 22px -6px rgba(236, 72, 153, 0.6), 0 4px 8px rgba(0, 0, 0, 0.1);
  transition: transform 0.12s ease, background 0.12s ease;
}

.app-fab:hover {
  background: var(--brand-pink-strong);
}

.app-fab:active {
  transform: scale(0.94);
}

/* ── Mobile element toolbar wrapper ──────────────────────────────────────── */

.mobile-toolbar-wrap {
  position: fixed;
  left: 50%;
  top: calc(var(--header-height-mobile) + 0.5rem);
  transform: translateX(-50%);
  z-index: 600;
  width: calc(100vw - 1.5rem);
  max-width: 380px;
  pointer-events: auto;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

/* Tablet — narrower right panel */
@media (max-width: 1100px) {
  .right-panel-wrap {
    width: var(--right-panel-width-md);
  }
}

/* Below the tablet breakpoint where the right panel might crowd the canvas:
 * keep the bottom bar pinned to the bottom of canvas-area (still snapped
 * to the screen bottom), but flip it to column direction so the toolbar
 * and zoom stack instead of competing for horizontal room. The toolbar's
 * 380px max width plus the zoom widget plus gaps adds up to roughly 540px;
 * canvas-area drops below that around 880px viewport width once the right
 * panel takes its share, which is what this breakpoint catches. */
@media (max-width: 900px) and (min-width: 769px) {
  .canvas-area__bottom-bar {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
  }
  .canvas-area__toolbar {
    width: 100%;
    max-width: 380px;
  }
  /* Flatten the right-stack to a horizontal row at this breakpoint.
   * The parent bar is already column-direction, so a vertically-
   * stacked right-stack inside that would push the bottom bar tall
   * enough to compete with the canvas for vertical space. A row
   * keeps history + zoom on the same line, centered along with the
   * toolbar that sits above them. margin-left: auto becomes a no-op
   * in column-direction so we reset it for clarity. */
  .canvas-area__right-stack {
    flex-direction: row;
    align-items: center;
    margin-left: 0;
  }
  .canvas-area__history,
  .canvas-area__zoom {
    margin-left: 0;
  }
}

/* Mobile — bottom sheet handles the right panel */
@media (max-width: 768px) {
  .editor-body {
    padding: 0 0.5rem 0.5rem;
    gap: 0.5rem;
  }

  .canvas-area {
    flex-direction: column;
  }

  .canvas-area__stage {
    flex: 1;
  }

  /* Mobile bottom bar — pulled out of absolute positioning so it
   * participates in canvas-area's flex column. Sits below the stage,
   * centered horizontally, with the bottom margin clearing the FAB.
   * History + zoom pills sit side-by-side, centered as a pair.
   * Reset the pointer-events:none / margin-left:auto from the desktop
   * defaults so clicks land normally and centering works. */
  .canvas-area__bottom-bar {
    position: static;
    align-self: center;
    margin-bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px));
    margin-top: 0.4rem;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    pointer-events: auto;
  }

  /* Element toolbar is rendered via .mobile-toolbar-wrap on mobile,
   * not via the bottom bar. */
  .canvas-area__toolbar {
    display: none;
  }

  /* Same flatten as the 900px breakpoint above — mobile bottom bar
   * is a horizontal row, so the right-stack inside follows suit
   * rather than stacking vertically. */
  .canvas-area__right-stack {
    flex-direction: row;
    align-items: center;
    margin-left: 0;
  }

  .canvas-area__history,
  .canvas-area__zoom {
    margin-left: 0;
  }

  .export-toast-wrap {
    left: 0.5rem;
    right: 0.5rem;
    top: calc(var(--header-height-mobile) + 0.6rem);
  }

  .export-toast {
    width: 100%;
    justify-content: center;
  }
}

/* Tighten on tiny screens */
@media (max-width: 480px) {
  .editor-body {
    padding: 0 0.4rem 0.4rem;
  }

  .app-fab {
    width: 52px;
    height: 52px;
  }
}
