/*
 * gra の低コストUX改善（2026-09-19）。
 * 既存のデザイントークンを優先して使い、テーマ・コントラスト方針を壊さない。
 * main.js/style.css を大きく触らずに独立して導入できるよう public 側に置く。
 */

.gra-reading-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-top: 0.8rem;
}

.gra-reading-progress {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-pill, 999px);
  background: var(--surface-muted, rgba(127, 127, 127, 0.12));
  box-shadow: inset 0 0 0 1px var(--hairline, rgba(127, 127, 127, 0.25));
  color: var(--muted, #666);
  font-size: 0.86rem;
  line-height: 1.35;
}

.gra-reading-resume,
.gra-admin-tool-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.5rem 0.9rem;
  border: 0;
  border-radius: var(--radius-pill, 999px);
  background: var(--surface, #fff);
  color: var(--fg, #171717);
  box-shadow: inset 0 0 0 1px var(--hairline, #bbb);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
}

.gra-reading-resume:hover,
.gra-admin-tool-button:hover {
  background: var(--surface-muted, #f1f1f1);
}

.gra-reading-resume:focus-visible,
.gra-admin-tool-button:focus-visible {
  outline: none;
  box-shadow: var(--ring, 0 0 0 3px rgba(0, 122, 255, 0.35));
}

.gra-reading-resume:active,
.gra-admin-tool-button:active {
  transform: translateY(1px);
}

.gra-reading-resume[hidden] {
  display: none;
}

/*
 * 長い画像記事で「今どこか」「1枚前/次」「記事先頭」を片手で操作する固定ナビ。
 * 既存のcmd-barは右側にあるため、左下へ分離して競合を避ける。画像が無い画面では
 * ux-enhancements.js 側がDOM自体を外すので、公開画面全体へ常駐はしない。
 */
.gra-reading-nav {
  position: fixed;
  z-index: 54;
  left: max(0.75rem, env(safe-area-inset-left));
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  min-height: 48px;
  padding: 0.25rem;
  border-radius: var(--radius-pill, 999px);
  background: var(--surface, #fff);
  background: color-mix(in srgb, var(--surface, #fff) 92%, transparent);
  color: var(--fg, #171717);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.16), inset 0 0 0 1px var(--hairline, rgba(127, 127, 127, 0.24));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.gra-reading-nav-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 1.55rem;
  line-height: 1;
  cursor: pointer;
  touch-action: manipulation;
}

.gra-reading-nav-button:hover:not(:disabled) {
  background: var(--surface-muted, rgba(127, 127, 127, 0.12));
}

.gra-reading-nav-button:focus-visible {
  outline: none;
  box-shadow: var(--ring, 0 0 0 3px rgba(0, 122, 255, 0.35));
}

.gra-reading-nav-button:disabled {
  cursor: default;
  opacity: 0.32;
}

.gra-reading-nav-status {
  min-width: 3.8rem;
  padding: 0 0.3rem;
  text-align: center;
  color: var(--muted, #666);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.gra-reading-nav-top {
  font-size: 1.2rem;
}

.gra-admin-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0.75rem 0 1rem;
  padding: 0.7rem;
  border-radius: var(--radius-lg, 12px);
  background: var(--surface-muted, rgba(127, 127, 127, 0.08));
  box-shadow: inset 0 0 0 1px var(--hairline, rgba(127, 127, 127, 0.22));
}

.gra-admin-tools-label {
  margin-right: 0.15rem;
  color: var(--muted, #666);
  font-size: 0.82rem;
  font-weight: 600;
}

.gra-admin-tool-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  transform: none;
}

.gra-admin-tool-status {
  flex-basis: 100%;
  min-height: 1.2em;
  color: var(--muted, #666);
  font-size: 0.8rem;
}

.gra-footer-guide-link {
  white-space: nowrap;
}

@media (max-width: 600px) {
  .gra-reading-tools,
  .gra-admin-tools {
    gap: 0.45rem;
  }

  .gra-reading-progress,
  .gra-reading-resume,
  .gra-admin-tool-button {
    min-height: 44px;
  }

  .gra-admin-tools-label {
    flex-basis: 100%;
  }

  .gra-reading-nav {
    left: max(0.5rem, env(safe-area-inset-left));
    bottom: max(0.5rem, env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .gra-reading-resume:active,
  .gra-admin-tool-button:active {
    transform: none;
  }
}