/* Quality slider */
    .quality-wrap {
      display: flex;
      align-items: center;
      gap: 14px;
      flex: 1;
      min-width: 200px;
    }

    .quality-num {
      font-size: 24px;
      font-weight: 400;
      color: var(--ink);
      min-width: 36px;
      text-align: right;
      line-height: 1;
    }
    .quality-grade {
      font-size: 11px;
      color: var(--ink-light);
      font-weight: 300;
      min-width: 96px;
    }

    /* Format selector */
    .format-btns {
      display: flex;
      gap: 0;
    }
    .fmt-btn:first-child { margin-left: 0; }
    .fmt-btn:hover:not(.active) { border-color: var(--blue); color: var(--blue); }

    /* Resize toggle */
    .resize-wrap { display: flex; align-items: center; gap: 10px; }

    .resize-inputs {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .dim-input {
      font-size: 12px;
      width: 70px;
      height: 32px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--ink);
      text-align: center;
      outline: none;
      padding: 0 6px;
      transition: border-color 0.15s;
    }
    .dim-input:focus { border-color: var(--ink); }
    .dim-input:disabled { opacity: 0.35; cursor: not-allowed; }

    .dim-sep {
      font-size: 12px;
      color: var(--ink-light);
    }

    .toggle-checkbox {
      appearance: none;
      width: 32px;
      height: 18px;
      background: var(--rule);
      border-radius: 9px;
      cursor: pointer;
      position: relative;
      transition: background 0.2s;
      flex-shrink: 0;
    }
    .toggle-checkbox::after {
      content: '';
      position: absolute;
      width: 12px;
      height: 12px;
      background: white;
      border-radius: 50%;
      top: 3px;
      left: 3px;
      transition: left 0.2s;
    }
    .toggle-checkbox:checked { background: var(--blue); }
    .toggle-checkbox:checked::after { left: 17px; }

    .toggle-label {
      font-size: 12px;
      font-weight: 300;
      color: var(--ink);
      cursor: pointer;
    }

    /* ── Info Strip ── */
    .info-strip {
      display: flex;
      border: 1px solid var(--border);
      background: var(--card);
      overflow: hidden;
    }

    /* ── Preview Layout ── */
    .preview-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1px;
      background: var(--rule);
      border: 1px solid var(--border);
    }

    .preview-pane {
      background: var(--card);
      display: flex;
      flex-direction: column;
    }

    .pane-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 16px;
      border-bottom: 1px solid var(--border);
      background: var(--bg);
    }
    .pane-title {
      font-size: 10px;
      letter-spacing: 0.2em;
      color: var(--ink-light);
      text-transform: uppercase;
    }
    .pane-meta {
      font-size: 10px;
      color: var(--ink-light);
    }

    .pane-img-area {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 300px;
      padding: 20px;
      background: repeating-conic-gradient(#E8EAED 0% 25%, var(--bg) 0% 50%) 0 0 / 16px 16px;
      position: relative;
      overflow: hidden;
    }

    .pane-img-area img {
      max-width: 100%;
      max-height: 360px;
      object-fit: contain;
      display: block;
      box-shadow: 0 4px 24px rgba(0,0,0,0.14);
    }

    /* Slider comparison overlay for the right pane */
    .compare-hint {
      position: absolute;
      bottom: 12px;
      right: 12px;
      font-size: 9px;
      letter-spacing: 0.1em;
      color: rgba(255,255,255,0.8);
      background: rgba(0,0,0,0.4);
      padding: 3px 8px;
      pointer-events: none;
    }

    .pane-footer {
      padding: 12px 16px;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .reduction-badge {
      font-size: 11px;
      font-weight: 400;
      padding: 3px 10px;
      letter-spacing: 0.05em;
    }
    .reduction-badge.good { background: var(--green-bg); color: var(--green); }
    .reduction-badge.warn { background: #FEF3C7; color: #92400E; }

    /* ── Saving summary ── */
    .saving-strip {
      display: flex;
      align-items: stretch;
      border: 1px solid var(--border);
      background: var(--card);
    }

    .saving-big {
      padding: 20px 28px;
      background: var(--blue);
      color: var(--bg);
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 2px;
      flex-shrink: 0;
    }
    .saving-big-label {
      font-size: 9px;
      letter-spacing: 0.2em;
      color: rgba(255,255,255,0.45);
      text-transform: uppercase;
    }
    .saving-big-num {
      font-size: 40px;
      font-weight: 400;
      letter-spacing: -0.02em;
      color: white;
      line-height: 1;
    }
    .saving-big-unit {
      font-size: 11px;
      color: rgba(255,255,255,0.5);
      letter-spacing: 0.1em;
    }

    .saving-details {
      display: flex;
      flex: 1;
      align-items: stretch;
    }
    .saving-detail-item {
      flex: 1;
      padding: 16px 20px;
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 3px;
    }
    .saving-detail-item:last-child { border-right: none; }
    .saving-detail-key {
      font-size: 9px;
      letter-spacing: 0.2em;
      color: var(--ink-light);
      text-transform: uppercase;
    }
    .saving-detail-val {
      font-size: 18px;
      color: var(--ink);
    }

    /* ── Action Bar ── */

    .compress-btn {
      font-size: 12px;
      letter-spacing: 0.15em;
      background: var(--blue);
      color: var(--bg);
      border: none;
      height: 48px;
      padding: 0 32px;
      cursor: pointer;
      transition: background 0.15s, transform 0.1s;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compress-btn:hover { background: var(--blue); }
    .compress-btn:active { transform: scale(0.98); }
    .compress-btn:disabled { opacity: 0.4; cursor: not-allowed; }
    .compress-btn:disabled:hover { background: var(--blue); }

    .download-btn.hidden { display: none; }

    .reset-btn.hidden { display: none; }

    /* Spinner */

    /* Placeholder state */
    .pane-placeholder {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      color: var(--ink-xlight);
      font-size: 12px;
      font-weight: 300;
      letter-spacing: 0.08em;
      width: 100%;
    }
    .pane-placeholder-icon { font-size: 28px; opacity: 0.35; }

    /* PNG warning note */
    .png-warning {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      background: #EFF6FF;
      border: 1px solid #BFDBFE;
      border-left: 3px solid var(--blue);
      border-radius: 6px;
      padding: 12px 16px;
    }
    .png-warning-icon { font-size: 15px; flex-shrink: 0; margin-top: 1px; line-height: 1.5; }
    .png-warning-body { display: flex; flex-direction: column; gap: 3px; }
    .png-warning-title {
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 0.15em;
      color: var(--blue);
      text-transform: uppercase;
    }
    .png-warning-text {
      font-size: 12.5px;
      color: var(--ink-mid);
      font-weight: 400;
      line-height: 1.75;
    }
    .png-warning-text strong { font-weight: 700; color: var(--ink); }

    /* Fade animation */

    /* Footer */

    /* Responsive */

/* ============================================================
   English layout fix for Image Compressor
   Keep the compressor aligned with the common tool design while
   preventing long English labels from breaking the control bar.
   ============================================================ */
html[lang="en"] #controlsBar {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) auto auto;
  align-items: stretch;
  flex-wrap: nowrap;
}

html[lang="en"] #controlsBar .ctrl-section {
  flex: initial;
  flex-shrink: initial;
  min-width: 0;
  padding: 14px 20px;
  gap: 12px;
  border-bottom: none;
}

html[lang="en"] #controlsBar .ctrl-quality {
  grid-column: 1;
  display: flex;
  align-items: center;
}

html[lang="en"] #controlsBar .ctrl-format {
  grid-column: 2;
  display: flex;
  align-items: center;
}

html[lang="en"] #controlsBar .ctrl-resize {
  grid-column: 3;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  border-right: none;
}

html[lang="en"] #controlsBar .ctrl-label {
  min-width: auto;
  white-space: nowrap;
  overflow-wrap: normal;
}

html[lang="en"] #controlsBar .quality-wrap {
  flex: 1 1 auto;
  min-width: 140px;
}

html[lang="en"] #controlsBar #qualitySlider {
  width: 100%;
  min-width: 120px;
}

html[lang="en"] #controlsBar .quality-grade {
  min-width: auto;
  white-space: nowrap;
}

html[lang="en"] #controlsBar .format-btns,
html[lang="en"] #controlsBar .resize-inputs {
  flex-wrap: nowrap;
}

html[lang="en"] #controlsBar .fmt-btn {
  white-space: nowrap;
  overflow-wrap: normal;
}

html[lang="en"] #controlsBar .dim-input {
  flex: 0 0 70px;
}

@media (max-width: 1040px) {
  html[lang="en"] #controlsBar {
    grid-template-columns: 1fr 1fr;
  }

  html[lang="en"] #controlsBar .ctrl-quality {
    grid-column: 1 / -1;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  html[lang="en"] #controlsBar .ctrl-format {
    grid-column: 1;
  }

  html[lang="en"] #controlsBar .ctrl-resize {
    grid-column: 2;
  }
}

@media (max-width: 700px) {
  html[lang="en"] #controlsBar {
    grid-template-columns: 1fr;
  }

  html[lang="en"] #controlsBar .ctrl-quality,
  html[lang="en"] #controlsBar .ctrl-format,
  html[lang="en"] #controlsBar .ctrl-resize {
    grid-column: 1;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  html[lang="en"] #controlsBar .ctrl-resize {
    border-bottom: none;
  }

  html[lang="en"] #controlsBar .format-btns {
    flex-wrap: wrap;
    gap: 4px;
  }

  html[lang="en"] #controlsBar .fmt-btn {
    flex: 1 1 auto;
  }
}

/* ============================================================
   Responsive fix: image-compress
   Applies to both Japanese and English pages.
   ============================================================ */
@media (max-width: 700px) {
  #controlsBar {
    display: grid;
    grid-template-columns: 1fr;
    align-items: stretch;
    overflow: visible;
  }

  #controlsBar .ctrl-section,
  #controlsBar .ctrl-quality,
  #controlsBar .ctrl-format,
  #controlsBar .ctrl-resize {
    grid-column: 1;
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
  }

  #controlsBar .ctrl-section:last-child,
  #controlsBar .ctrl-resize {
    border-bottom: none;
  }

  #controlsBar .quality-wrap,
  #controlsBar .resize-wrap,
  #controlsBar .resize-inputs,
  #controlsBar .format-btns {
    width: 100%;
    min-width: 0;
    flex-wrap: wrap;
  }

  #controlsBar #qualitySlider {
    flex: 1 1 auto;
    min-width: 0;
  }

  #controlsBar .quality-grade,
  #controlsBar .ctrl-label,
  #controlsBar .fmt-btn {
    white-space: normal;
  }

  .preview-wrapper {
    grid-template-columns: 1fr !important;
  }

  .pane-header,
  .pane-footer {
    flex-wrap: wrap;
    gap: 8px;
  }

  .pane-img-area {
    min-height: 220px;
    padding: 14px;
  }

  .pane-img-area img {
    max-height: 260px;
  }

  .saving-strip,
  .saving-details {
    flex-direction: column;
  }

  .saving-detail-item {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .saving-detail-item:last-child {
    border-bottom: none;
  }
}


/* ── Image compression learning content ── */
.compression-learn {
  scroll-margin-top: 90px;
}
.compression-learn h3 {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
}
.compression-learn a {
  color: var(--blue);
  font-weight: 500;
  text-underline-offset: 3px;
}
.compression-format-grid,
.compression-use-grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}
.compression-format-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.compression-use-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.compression-format-card,
.compression-use-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
}
.compression-format-card p,
.compression-use-card p {
  margin: 0;
}
.compression-tip {
  margin-top: 14px;
  padding: 14px 16px;
  border-left: 3px solid var(--blue);
  background: var(--blue-light);
  color: var(--ink-mid);
  font-size: 13px;
  line-height: 1.8;
}
.compression-steps,
.compression-check-list {
  margin: 12px 0 0;
  padding-left: 1.35em;
}
.compression-steps li + li,
.compression-check-list li + li {
  margin-top: 10px;
}
.compression-faq-item {
  padding: 18px 0;
  border-top: 1px solid var(--border);
}
.compression-faq-item:last-child {
  border-bottom: 1px solid var(--border);
}
.compression-faq-item p {
  margin: 0;
}

@media (max-width: 800px) {
  .compression-format-grid,
  .compression-use-grid {
    grid-template-columns: 1fr;
  }
}