/* Scriptura v3 — platform layer: viewport, touch, safe areas, sheets and floating chrome */

/* =====================================================================
   BASELINE
   ===================================================================== */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  /* Keep the native bounce, drop pull-to-refresh */
  overscroll-behavior-y: contain;
  scroll-padding-top: calc(var(--bar-h) + var(--bar-gap) + env(safe-area-inset-top, 0px) + 16px);
  scroll-padding-bottom: calc(var(--tabbar-h) + 40px);
}

/* Lock the page behind an open sheet */
html.has-sheet { overflow: hidden; }

*, *::before, *::after { box-sizing: border-box; }

button, a, label, [role="button"], [role="tab"], [role="radio"] {
  touch-action: manipulation;
}

/* Controls are not content: no text selection or long-press callout */
button, label.btn, [role="tab"], [role="radio"], .tab-bar, .chip, .sheet-grip, .verse-toolbar {
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

/* iOS zooms into any field under 16px */
input, textarea, select { font-size: 16px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

/* Press feedback on pointer-down, for touch and mouse alike */
.pressable {
  transition:
    transform var(--dur-fast) var(--ease-out),
    background-color var(--dur-fast) ease,
    color var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    box-shadow var(--dur-fast) ease;
}
.pressable:active:not(:disabled) { transform: scale(0.97); }

/* =====================================================================
   SHEETS (plain layers, no <dialog>: bottom sheet on phones, centred panel above 768px)
   ===================================================================== */
/* One full-screen layer holds the scrim and the sheets; the open sheet sits at its foot as an ordinary block,
   so nothing depends on the browser's dialog handling (which misbehaves in iOS Safari) */
.sheet-layer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: var(--z-sheet);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overscroll-behavior: contain;
}
.sheet-layer[hidden] { display: none; }
.sheet-scrim {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(28, 22, 12, 0.36);
  background: var(--scrim, rgba(28, 22, 12, 0.36));
  opacity: 0;
  transition: opacity var(--dur-slow) ease;
  touch-action: none;
}
.sheet-layer.is-open .sheet-scrim { opacity: 1; }

.sheet {
  --sheet-pad: 20px;
  position: relative;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-height: calc(100% - env(safe-area-inset-top, 0px) - 24px);
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  background: var(--raised);
  color: var(--ink);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  outline: none;
  transform: translateY(100%);
  transition: transform var(--dur-slow) var(--ease-sheet);
}
.sheet[hidden] { display: none; }
.sheet.is-open { transform: translateY(0); }
.sheet.is-dragging { transition: none; }
.sheet--tall { height: min(88%, 860px); }

.sheet-grip { flex-shrink: 0; touch-action: none; }
.sheet-handle {
  width: 38px;
  height: 5px;
  margin: 8px auto 0;
  border-radius: 3px;
  background: var(--line-strong);
}
.sheet-head {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 56px;
  padding: 0 8px 0 var(--sheet-pad);
}
.sheet-head:has(.picker-back:not(.hidden)) { padding-left: 6px; }
.sheet-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-text);
  font-size: 21px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.sheet-head--compose {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  padding: 0 12px;
}
.sheet-head--compose .sheet-title { flex: none; text-align: center; }
.sheet-head--compose .text-btn:first-child { justify-self: start; }
.sheet-head--compose .text-btn:last-child { justify-self: end; }

.sheet-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 6px var(--sheet-pad) calc(var(--sheet-pad) + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 768px) {
  .sheet-layer { justify-content: center; align-items: center; padding: 32px 24px; }
  .sheet {
    --sheet-pad: 24px;
    width: min(580px, 100%);
    max-height: min(780px, 100%);
    border-radius: var(--r-xl);
    opacity: 0;
    transform: translateY(14px) scale(0.98);
    transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
  }
  .sheet--tall { height: min(780px, 100%); }
  .sheet.is-open { opacity: 1; transform: none; }
  .sheet-handle { display: none; }
  .sheet-head { min-height: 64px; padding-top: 4px; }
  .sheet-body { padding-bottom: var(--sheet-pad); }
}

/* =====================================================================
   FLOATING TAB BAR (phones and tablets)
   ===================================================================== */
.tab-bar {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
  z-index: var(--z-tabbar);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(400px, calc(100vw - 24px));
  height: var(--tabbar-h);
  padding: 6px;
  border-radius: var(--r-pill);
  background: var(--glass);
  -webkit-backdrop-filter: saturate(1.6) blur(22px);
  backdrop-filter: saturate(1.6) blur(22px);
  box-shadow: var(--shadow-md), inset 0 0 0 1px var(--glass-edge), 0 0 0 1px var(--line);
  transform: translateX(-50%);
  transition: transform var(--dur-slow) var(--ease-out);
}
.tab {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  min-width: 0;
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--ink-3);
  font: 600 11px/1 var(--font-ui);
  letter-spacing: 0.01em;
}
.tab .icon { width: 23px; height: 23px; }
.tab.is-active { color: var(--accent-ink); }
.tab.is-active .icon { fill: currentColor; fill-opacity: 0.16; }
.tab-indicator {
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: calc((100% - 12px) / 4);
  border-radius: var(--r-pill);
  background: var(--accent);
  box-shadow: 0 8px 18px -8px var(--accent-line), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  transform: translateX(calc(var(--tab-index, 0) * 100%));
  transition: transform var(--dur-slow) var(--ease-spring);
}

/* Immersive reading: chrome slides away while scrolling down */
body.chrome-hidden .tab-bar,
body.has-verse-toolbar .tab-bar {
  transform: translate(-50%, calc(100% + 24px + env(safe-area-inset-bottom, 0px)));
}

/* =====================================================================
   VERSE TOOLBAR
   ===================================================================== */
.verse-toolbar {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + 12px);
  z-index: var(--z-toolbar);
  width: min(460px, calc(100vw - 16px));
  padding: 8px 8px 6px;
  border-radius: 26px;
  background: var(--raised);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--line), var(--inner-light);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 24px);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out), visibility 0s linear var(--dur-base);
}
.verse-toolbar.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
  transition-delay: 0s;
}
.vt-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 4px 10px 10px;
  border-bottom: 1px solid var(--line);
}
.vt-ref {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font: 600 14.5px var(--font-ui);
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.hl-palette { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }
.hl-swatch {
  position: relative;
  width: 30px;
  height: 30px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--sw, transparent);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
  transition: transform var(--dur-fast) var(--ease-spring);
}
.hl-swatch[data-color="gold"] { --sw: var(--sw-gold); }
.hl-swatch[data-color="rose"] { --sw: var(--sw-rose); }
.hl-swatch[data-color="emerald"] { --sw: var(--sw-emerald); }
.hl-swatch[data-color="sky"] { --sw: var(--sw-sky); }
.hl-swatch[data-color="amethyst"] { --sw: var(--sw-amethyst); }
.hl-swatch::before { content: ''; position: absolute; inset: -4px; }
.hl-swatch[aria-pressed="true"]::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--sw);
}
.hl-clear {
  display: grid;
  place-items: center;
  color: var(--ink-3);
  box-shadow: inset 0 0 0 1.5px var(--line-strong);
}
.vt-actions { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); padding-top: 6px; }
.vt-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  min-width: 0;
  padding: 9px 0 7px;
  border: 0;
  border-radius: 14px;
  background: transparent;
  color: var(--ink-2);
  font: 600 11.5px/1 var(--font-ui);
  position: relative;
}
.vt-btn:disabled { opacity: 0.4; }
.vt-badge {
  position: absolute;
  top: 3px;
  left: calc(50% + 6px);
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--accent-ink);
  font: 700 10.5px/18px var(--font-ui);
  font-variant-numeric: tabular-nums;
  text-align: center;
  box-shadow: 0 0 0 2px var(--raised);
}
.vt-badge[hidden] { display: none; }
.vt-btn span { max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vt-btn .icon { width: 22px; height: 22px; }
.vt-btn[aria-pressed="true"] { color: var(--accent); }
.vt-btn[aria-pressed="true"] .icon { fill: currentColor; fill-opacity: 0.18; }

/* =====================================================================
   BACK TO THE VERSE A CROSS-REFERENCE TRAIL STARTED FROM
   ===================================================================== */
.xref-return {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + var(--tabbar-h) + 24px);
  z-index: var(--z-toolbar);
  display: flex;
  align-items: center;
  padding: 4px;
  border-radius: var(--r-pill);
  background: var(--ink);
  color: var(--canvas);
  box-shadow: var(--shadow-lg);
  transform: translateX(-50%);
  animation: pill-in var(--dur-base) var(--ease-out);
}
.xref-return[hidden],
body:not([data-view="reader"]) .xref-return,
.has-verse-toolbar .xref-return { display: none; }
.xref-back, .xref-dismiss {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  color: inherit;
  font: 600 14px var(--font-ui);
  white-space: nowrap;
}
.xref-back { padding: 0 14px 0 10px; }
.xref-dismiss { justify-content: center; width: 40px; opacity: 0.7; }
@keyframes pill-in {
  from { opacity: 0; transform: translate(-50%, 12px); }
}

/* =====================================================================
   TOASTS
   ===================================================================== */
.toast-stack {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom, 0px) + var(--tabbar-h) + 24px);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: max-content;
  max-width: calc(100vw - 32px);
  transform: translateX(-50%);
  pointer-events: none;
}
.scriptura-toast {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 44px;
  max-width: 100%;
  padding: 10px 18px;
  border-radius: 14px;
  background: var(--ink);
  color: var(--canvas);
  font: 500 14.5px/1.35 var(--font-ui);
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(10px) scale(0.98);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.scriptura-toast.is-visible { opacity: 1; transform: none; }
.scriptura-toast.has-action { padding-right: 8px; }
.toast-action {
  flex-shrink: 0;
  min-height: 34px;
  padding: 0 10px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--toast-accent);
  font: 650 14px var(--font-ui);
}

/* =====================================================================
   BREAKPOINTS
   ===================================================================== */
@media (max-width: 1023px) {
  body.chrome-hidden .top-bar { transform: translateY(calc(-100% - 20px)); }
}

@media (min-width: 1024px) {
  .tab-bar { display: none; }
  .verse-toolbar, .toast-stack, .xref-return { left: calc(50% + var(--rail-w) / 2); }
  .xref-return { bottom: 28px; }
  .verse-toolbar { bottom: 24px; }
  .toast-stack { bottom: 28px; }
}

/* Very small phones: six labelled actions don't fit in one row, so use two */
@media (max-width: 359px) {
  .hl-palette { gap: 4px; }
  .hl-swatch { width: 26px; height: 26px; }
  .vt-actions { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* =====================================================================
   HOVER — only where a precise pointer can hover, so taps never stick
   ===================================================================== */
@media (hover: hover) and (pointer: fine) {
  .xref-item:hover .xref-ref { text-decoration: underline; text-underline-offset: 3px; }
  .xref-back:hover, .xref-dismiss:hover { background: color-mix(in srgb, var(--canvas) 14%, transparent); }
  .btn-primary:hover { background: color-mix(in srgb, var(--accent) 86%, var(--ink)); }
  .btn-secondary:hover { background: var(--surface); }
  .btn-quiet:hover { background: var(--surface); color: var(--ink); }
  .icon-btn:hover { background: var(--surface); color: var(--ink); }
  .icon-btn[aria-pressed="true"]:hover { background: var(--accent-soft); color: var(--accent); }
  .text-btn:hover { color: var(--ink); }
  .text-btn--strong:hover { color: color-mix(in srgb, var(--accent) 80%, var(--ink)); }
  .text-link:hover { text-decoration-color: var(--accent); }
  .chip:hover, .color-chip:hover, .card-style:hover { border-color: var(--ink-3); color: var(--ink); }
  .chip.is-active:hover, .color-chip[aria-pressed="true"]:hover { color: var(--canvas); }
  .segment:hover { color: var(--ink); }
  .rail-link:hover { background: color-mix(in srgb, var(--raised) 70%, transparent); color: var(--ink); }
  .rail-brand:hover, .passage-link:hover { background: color-mix(in srgb, var(--raised) 70%, transparent); }
  .location-btn:hover { background: var(--surface); }
  .verse:hover .verse-ink { text-decoration-color: var(--line-strong); }
  .verse.is-selected:hover .verse-ink { text-decoration-color: var(--accent); }
  .cn-btn:hover, .book-btn:hover, .ch-btn:hover { background: color-mix(in srgb, var(--surface) 72%, var(--line-strong)); }
  .book-btn.is-current:hover { background: var(--accent-soft); }
  .ch-btn.is-current:hover { background: var(--accent); }
  .suggest:hover { background: var(--raised); }
  .result:hover .result-text, .result:hover .result-title, .offline-item:hover .oi-title, .lib-open:hover .lib-text { color: var(--ink); }
  .plan-open:hover .pd-title { color: var(--accent); }
  .plan-check:hover::before { box-shadow: inset 0 0 0 1.5px var(--accent); }
  .vt-btn:hover { background: var(--surface); color: var(--ink); }
  .vt-btn[aria-pressed="true"]:hover { color: var(--accent); }
  .hl-swatch:hover { transform: scale(1.1); }
  .tab:hover { color: var(--ink-2); }
  .tab.is-active:hover { color: var(--accent-ink); }
  .btn:hover .btn-orb, .goto-result:hover .btn-orb { transform: translate(2px, -1px) scale(1.06); }
  .lib-remove:hover { color: var(--rubric); background: color-mix(in srgb, var(--rubric) 10%, transparent); }
  .goto-result:hover { background: color-mix(in srgb, var(--accent) 88%, var(--ink)); }
  .theme-btn:hover .theme-swatch { box-shadow: 0 0 0 2px var(--raised), 0 0 0 4px var(--line-strong); }
  .theme-btn[aria-checked="true"]:hover .theme-swatch { box-shadow: 0 0 0 2px var(--raised), 0 0 0 4px var(--accent); }
  .mem-blank:hover { border-bottom-color: var(--accent); }
}

/* =====================================================================
   REDUCED MOTION
   ===================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
  .pressable:active:not(:disabled) { transform: none; }
}