/* ── Page Title ── */

    /* ── Mode Toggle ── */
    .mode-bar {
      display: flex;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: var(--card);
      overflow: hidden;
      align-self: flex-start;
    }

    .mode-btn {
      font-size: 12px;
      font-weight: 500;
      letter-spacing: 0.06em;
      padding: 0 28px;
      height: 44px;
      border: none;
      background: transparent;
      color: var(--ink-light);
      cursor: pointer;
      transition: all 0.15s;
      border-right: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .mode-btn:last-child { border-right: none; }

    .mode-btn.active {
      background: var(--blue);
      color: #fff;
    }

    .mode-badge {
      font-size: 10px;
      font-weight: 700;
      background: var(--blue-mid);
      color: var(--blue);
      padding: 2px 6px;
      border-radius: 3px;
      letter-spacing: 0;
    }

    .mode-btn.active .mode-badge {
      background: rgba(255,255,255,0.18);
      color: #fff;
    }

    .drop-zone.drag-over .drop-icon {
      transform: translateY(-4px);
    }

    /* ── Quality Bar (PNG→JPG only) ── */
    .quality-bar {
      display: flex;
      align-items: center;
      border: 1px solid var(--border);
      background: var(--card);
      overflow: hidden;
    }

    .quality-label {
      font-size: 10px;
      letter-spacing: 0.2em;
      color: var(--ink-light);
      text-transform: uppercase;
      padding: 0 16px;
      height: 44px;
      display: flex;
      align-items: center;
      border-right: 1px solid var(--border);
      flex-shrink: 0;
      white-space: nowrap;
    }

    .quality-slider-wrap {
      flex: 1;
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 0 20px;
    }

    .quality-value {
      font-size: 18px;
      font-weight: 400;
      color: var(--ink);
      min-width: 40px;
      text-align: right;
    }

    .quality-desc {
      font-size: 11px;
      color: var(--ink-light);
      font-weight: 300;
      border-left: 1px solid var(--border);
      padding: 0 16px;
      height: 44px;
      display: flex;
      align-items: center;
      min-width: 120px;
    }

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

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

    .preview-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 16px;
      border-bottom: 1px solid var(--border);
      background: var(--bg);
    }

    .preview-header-left {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .preview-format-badge {
      font-size: 10px;
      letter-spacing: 0.15em;
      padding: 3px 8px;
      font-weight: 400;
    }

    .badge-png {
      background: #E8F0FE;
      color: #3060C0;
    }

    .badge-jpg {
      background: #FFF3E0;
      color: var(--blue);
    }

    .badge-output {
      background: var(--blue);
      color: #fff;
    }

    .preview-label {
      font-size: 10px;
      letter-spacing: 0.15em;
      color: var(--ink-light);
      text-transform: uppercase;
    }

    .preview-meta {
      font-size: 10px;
      color: var(--ink-light);
      letter-spacing: 0.05em;
    }

    .preview-img-wrap {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 280px;
      padding: 20px;
      background: repeating-conic-gradient(#E8EAED 0% 25%, var(--bg) 0% 50%) 0 0 / 16px 16px;
      position: relative;
    }

    .preview-img-wrap img {
      max-width: 100%;
      max-height: 320px;
      object-fit: contain;
      display: block;
      box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    }

    .preview-empty {
      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: 0.1em;
      width: 100%;
    }

    .preview-empty-icon { font-size: 32px; opacity: 0.4; }

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

    .size-info {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .size-num {
      font-size: 14px;
      color: var(--ink);
    }

    .size-diff {
      font-size: 10px;
      padding: 2px 7px;
    }

    .size-diff.smaller { background: #E8F5E9; color: var(--green); }
    .size-diff.larger  { background: #FFF3E0; color: var(--blue); }

    /* ── Action Bar ── */

    .convert-btn {
      font-size: 12px;
      letter-spacing: 0.15em;
      background: var(--blue);
      color: #fff;
      border: none;
      border-radius: 8px;
      height: 48px;
      padding: 0 28px;
      cursor: pointer;
      transition: background 0.15s, transform 0.1s;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .convert-btn:hover { background: var(--blue-hover); }
    .convert-btn:active { transform: scale(0.98); }
    .convert-btn:disabled { opacity: 0.4; cursor: not-allowed; }
    .convert-btn:disabled:hover { background: var(--blue); }

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

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

    /* spinner */

    .converting .btn-text { display: none; }

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

    /* ── Footer ── */

    /* Animations */
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(8px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* Responsive */
    /* ── Preview height alignment fix ── */
    .preview-area {
      align-items: stretch;
    }
    .preview-panel {
      min-width: 0;
    }
    .preview-img-wrap {
      height: 360px;
      min-height: 360px;
      flex: 0 0 360px;
      overflow: hidden;
    }
    .preview-img-wrap img {
      max-height: 100%;
    }
    .preview-footer {
      min-height: 64px;
      box-sizing: border-box;
    }
    @media (max-width: 900px) {
      .preview-img-wrap {
        height: 320px;
        min-height: 320px;
        flex-basis: 320px;
      }
    }

/* ============================================================
   Responsive fix: image-converter
   Keeps the PNG/JPG converter usable on smartphone screens.
   ============================================================ */
@media (max-width: 700px) {
  .mode-bar {
    width: 100%;
    align-self: stretch;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
  }

  .mode-btn {
    width: 100%;
    min-width: 0;
    height: auto;
    min-height: 44px;
    padding: 10px 8px;
    justify-content: center;
    gap: 6px;
    white-space: normal;
    text-align: center;
  }

  .quality-bar {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
  }

  .quality-label,
  .quality-desc {
    width: 100%;
    min-width: 0;
    height: auto;
    min-height: 38px;
    padding: 10px 14px;
    border-right: none;
    border-left: none;
    white-space: normal;
  }

  .quality-label {
    border-bottom: 1px solid var(--border);
  }

  .quality-desc {
    border-top: 1px solid var(--border);
  }

  .quality-slider-wrap {
    width: 100%;
    min-width: 0;
    padding: 14px;
    gap: 12px;
  }

  .quality-slider-wrap input[type="range"] {
    flex: 1 1 auto;
    min-width: 0;
  }

  .quality-value {
    min-width: 34px;
    text-align: right;
  }

  .info-strip {
    flex-direction: column;
    overflow: visible;
  }

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

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

  .info-val {
    overflow-wrap: anywhere;
  }

  .preview-area {
    display: grid;
    grid-template-columns: 1fr !important;
    align-items: stretch;
    overflow: hidden;
  }

  .preview-panel {
    min-width: 0;
  }

  .preview-header,
  .preview-footer {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 8px;
  }

  .preview-img-wrap {
    height: auto;
    min-height: 240px;
    flex: 0 0 auto;
    padding: 14px;
  }

  .preview-img-wrap img {
    max-height: 260px;
  }

  .size-info {
    flex-wrap: wrap;
  }

  .action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .action-bar .convert-btn,
  .action-bar .download-btn,
  .action-bar .reset-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 430px) {
  .mode-bar {
    grid-template-columns: 1fr;
  }

  .mode-btn {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .mode-btn:last-child {
    border-bottom: none;
  }
}