/* ============================================================
   Hifzhelper — "Surahs in my Heart" screen (V3.46.0)

   V3.47.0: canvas replaced by the runtime-built #sihSvg vector scene.
   Layout, confirmed in chat:
   - Large screens: image takes up to 75% of the screen with the
     controls in a fully-expanded panel on the LEFT-hand side.
   - Mobile: controls roll up — a slim always-visible toolbar
     (colour swatch, solid/gradient toggle, undo, zoom-to-fit,
     menu), with the colour picker and the remaining actions each
     opening as a bottom sheet over the lower canvas. Tapping the
     canvas (or the sheet's chevron) rolls them back down.
   Breakpoint: 768px, matching the app-wide unification (V3.44).
   ============================================================ */

/* The screen keeps the standard container look; the layout inside is
   its own thing (canvas viewport + controls), so no .screen-content
   width cap — same standing-exception category as Juz Tracker. */
#screen-sih .sih-header-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: #FFFFFF;
  border-radius: var(--radius-md, 8px);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
}
#screen-sih .sih-header-row h2 { margin: 0; flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sih-layout {
  position: relative;   /* the mobile sheets anchor to this */
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sih-viewport {
  position: relative;
  overflow: hidden;
  background: #FFFFFF;
  border-radius: var(--radius-md, 8px);
  touch-action: none;        /* all pan/zoom/tap handled in JS */
  height: calc(100dvh - var(--auth-band-height, 56px) - 190px);
  min-height: 320px;
}
#sihSvg {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 0 0;
  /* Base CSS size matches the old canvas box so the fit/zoom math is
     unchanged; JS re-lays the SVG out at the committed zoom scale so
     the vector art stays crisp at rest at every zoom level. */
  width: 1191px;
  height: 1684px;
  display: block;
}

/* Transient surah chip (V3.47.0, confirmed in chat): appears over the
   canvas after each fill, names the surah, fades out. */
.sih-chip {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  background: var(--palette-evergreen, #344C3D);
  color: #FFFFFF;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.95rem;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}
.sih-chip.show { opacity: 1; }

/* ---------------- controls panel ---------------- */

.sih-panel { display: flex; flex-direction: column; gap: var(--space-sm); }

.sih-sec {
  background: #FFFFFF;
  border-radius: var(--radius-md, 8px);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sih-sheet-head {
  display: none;             /* mobile-sheet furniture; hidden on desktop */
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
}
.sih-sheet-close {
  border: none; background: none; padding: 4px; cursor: pointer;
  color: inherit; line-height: 0;
}
.sih-sheet-close svg { width: 22px; height: 22px; }

.sih-mode-toggle { display: flex; gap: 0; border: 1px solid var(--color-table-border); border-radius: var(--radius-md, 8px); overflow: hidden; width: max-content; }
.sih-mode-toggle button {
  border: none; background: #FFFFFF; padding: 6px 14px; cursor: pointer;
  font: inherit; font-size: 0.9rem;
}
.sih-mode-toggle button.active { background: var(--palette-sage, #829672); color: #FFFFFF; }

.sih-swatch-row { display: flex; gap: var(--space-sm); align-items: center; }
.sih-swatch {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--color-table-border);
  cursor: pointer;
  padding: 0;
}
.sih-swatch.active { border-color: var(--palette-evergreen, #344C3D); box-shadow: 0 0 0 2px rgba(52, 76, 61, 0.25); }

#sihWheel {
  width: 220px; height: 220px;
  align-self: center;
  touch-action: none;
  cursor: crosshair;
}
#sihLightness {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 14px;
  border-radius: 7px;
  border: 1px solid var(--color-table-border);
  outline: none;
}
#sihLightness::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 2px solid var(--palette-evergreen, #344C3D);
  cursor: pointer;
}
#sihLightness::-moz-range-thumb {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #FFFFFF;
  border: 2px solid var(--palette-evergreen, #344C3D);
  cursor: pointer;
}

.sih-sec-actions button, .sih-sec-view button { width: 100%; }
.sih-sec-view { flex-direction: row; }
.sih-sec-view button {
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.sih-sec-view button svg { width: 18px; height: 18px; }

/* ---------------- mobile toolbar + sheets (below 768px) ------------- */

.sih-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: #FFFFFF;
  border-radius: var(--radius-md, 8px);
  padding: var(--space-sm);
}
.sih-toolbar .sih-toolbar-btn {
  border: 1px solid var(--color-table-border);
  background: #FFFFFF;
  border-radius: var(--radius-md, 8px);
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; padding: 0; line-height: 0;
}
.sih-toolbar .sih-toolbar-btn svg { width: 20px; height: 20px; }
.sih-toolbar .sih-toolbar-btn:disabled { opacity: 0.4; }
.sih-toolbar .sih-mode-toggle { margin-left: auto; }
.sih-toolbar-swatch { flex: none; }

.sih-eraser-hint {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted, #6B6B6B);
  text-align: center;
}

@media (max-width: 767px){
  .sih-panel { display: contents; }   /* sections position themselves */
  .sih-sec-view { display: none; }    /* undo/zoom-fit live in the toolbar */
  /* Three-way mode toggle in the compact toolbar (V3.48.0 added Eraser):
     tighter padding/font than the panel's roomier version so it still
     fits alongside the swatch, undo, zoom-fit, and menu buttons. */
  .sih-toolbar .sih-mode-toggle button { padding: 6px 8px; font-size: 0.78rem; }
  .sih-sec-colour, .sih-sec-actions {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 60;
    border-radius: var(--radius-md, 8px) var(--radius-md, 8px) 0 0;
    box-shadow: 0 -4px 18px rgba(0, 0, 0, 0.25);
    transform: translateY(105%);
    transition: transform 0.25s ease;
    max-height: 70dvh;
    overflow-y: auto;
    padding-bottom: calc(var(--space-md) + env(safe-area-inset-bottom, 0px));
  }
  .sih-sec-colour.open, .sih-sec-actions.open { transform: translateY(0); }
  .sih-sheet-head { display: flex; }
  /* the sheet has its own mode toggle context — the toolbar's stays */
}

@media (min-width: 768px){
  .sih-toolbar { display: none; }
  .sih-layout {
    display: grid;
    /* controls ~25% capped, image column takes the rest (up to 75%) */
    grid-template-columns: minmax(230px, 25%) 1fr;
    align-items: start;
  }
  .sih-viewport {
    height: calc(100dvh - var(--auth-band-height, 56px) - 150px);
    min-height: 420px;
  }
}