* { margin: 0; padding: 0; box-sizing: border-box; }

  :root {
    --bg_sag: #ffffff;
    --surface_sag: #f5f5f5;
    --border_sag: #e0e0e0;
    --text_primary_sag: #111111;
    --text_secondary_sag: #555555;
    --text_muted_sag: #999999;
    --accent_sag: #111111;
    --accent_light_sag: #f0f0f0;
    --error_sag: #cc0000;
    --radius_sag: 8px;
    --font_sag: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  }

  body {
    font-family: var(--font_sag);
    background: var(--bg_sag);
    color: var(--text_primary_sag);
    min-height: 100vh;
  }

  /* ── Header ── */
  .header_sag {
    border-bottom: 1.5px solid var(--border_sag);
    padding: 24px 48px;
    display: flex;
    align-items: center;
    gap: 14px;
  }

  .header_icon_sag {
    width: 32px; height: 32px;
    flex-shrink: 0;
  }

  .header_title_sag {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text_primary_sag);
  }

  /* ── Main layout ── */
  .main_sag {
    max-width: 900px;
    margin: 0 auto;
    padding: 48px 24px 100px;
  }

  /* ── Input section ── */
  .input_section_sag {
    margin-bottom: 48px;
  }

  .label_sag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--text_secondary_sag);
    margin-bottom: 12px;
  }

  .label_icon_sag { width: 14px; height: 14px; }

  .textarea_sag {
    width: 100%;
    min-height: 140px;
    padding: 16px 18px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text_primary_sag);
    background: var(--bg_sag);
    border: 1.5px solid var(--border_sag);
    border-radius: var(--radius_sag);
    resize: vertical;
    outline: none;
    transition: border-color 0.15s;
  }

  .textarea_sag::placeholder { color: var(--text_muted_sag); }

  .textarea_sag:focus { border-color: var(--accent_sag); }

  .input_footer_sag {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
  }

  .hint_sag {
    font-size: 12px;
    color: var(--text_muted_sag);
  }

  /* ── Buttons ── */
  .btn_primary_sag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--accent_sag);
    color: #ffffff;
    border: none;
    border-radius: var(--radius_sag);
    font-family: var(--font_sag);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
  }

  .btn_primary_sag:hover { opacity: 0.82; }

  .btn_secondary_sag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg_sag);
    color: var(--text_primary_sag);
    border: 1.5px solid var(--border_sag);
    border-radius: var(--radius_sag);
    font-family: var(--font_sag);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
  }

  .btn_secondary_sag:hover { background: var(--accent_light_sag); }

  .btn_icon_sag { width: 16px; height: 16px; }

  /* ── Toolbar ── */
  .toolbar_sag {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border_sag);
  }

  .toolbar_count_sag {
    font-size: 13px;
    color: var(--text_secondary_sag);
  }

  .toolbar_count_sag strong {
    color: var(--text_primary_sag);
    font-weight: 700;
  }

  .toolbar_actions_sag { display: flex; gap: 10px; }

  /* ── QR Grid ── */
  .grid_sag {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 24px;
  }

  .qr_card_sag {
    border: 1.5px solid var(--border_sag);
    border-radius: var(--radius_sag);
    overflow: hidden;
    background: var(--bg_sag);
    transition: border-color 0.15s;
  }

  .qr_card_sag:hover { border-color: var(--accent_sag); }

  .qr_img_wrap_sag {
    padding: 18px 18px 14px;
    display: flex;
    justify-content: center;
    background: #ffffff;
  }

  .qr_img_wrap_sag canvas,
  .qr_img_wrap_sag img {
    display: block;
    width: 120px !important;
    height: 120px !important;
  }

  .qr_footer_sag {
    padding: 10px 14px 12px;
    border-top: 1px solid var(--border_sag);
    background: var(--surface_sag);
  }

  .qr_code_label_sag {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    font-weight: 700;
    color: var(--text_primary_sag);
    text-align: center;
    word-break: break-all;
    line-height: 1.4;
  }

  /* ── Empty / error states ── */
  .empty_sag {
    text-align: center;
    padding: 60px 20px;
    color: var(--text_muted_sag);
  }

  .empty_icon_sag {
    width: 48px; height: 48px;
    margin: 0 auto 16px;
    opacity: 0.35;
  }

  .empty_title_sag {
    font-size: 15px;
    font-weight: 600;
    color: var(--text_secondary_sag);
    margin-bottom: 6px;
  }

  .empty_desc_sag { font-size: 13px; }

  .error_banner_sag {
    background: #fff5f5;
    border: 1px solid #ffc0c0;
    color: var(--error_sag);
    border-radius: var(--radius_sag);
    padding: 12px 16px;
    font-size: 13px;
    margin-bottom: 20px;
    display: none;
  }

  /* ── Print ── */
  @media print {
    .header_sag, .input_section_sag, .toolbar_sag { display: none; }
    .qr_card_sag { border: 1px solid #ccc; break-inside: avoid; }
    .grid_sag { gap: 16px; }
  }

  /* ── Responsive ── */
  @media (max-width: 600px) {
    .header_sag { padding: 16px 20px; }
    .header_sub_sag { display: none; }
    .main_sag { padding: 28px 16px 60px; }
    .grid_sag { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; }
  }
  .qr_footer_sag {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
  }

  .qr_dl_btn_sag {
    flex-shrink: 0;
    width: 26px; height: 26px;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg_sag);
    border: 1px solid var(--border_sag);
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.15s;
  }

  .qr_dl_btn_sag:hover { background: var(--accent_light_sag); }
  .qr_dl_btn_sag svg { width: 14px; height: 14px; }

  .footer_sag {
    border-top: 1px solid var(--border_sag);
    padding: 20px 48px;
    text-align: center;
    font-size: 12px;
    color: var(--text_muted_sag);
    letter-spacing: 0.2px;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--bg_sag);
  }

  .file_drop_sag {
  margin-top: 12px;
  border: 1.5px dashed var(--border_sag);
  border-radius: var(--radius_sag);
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  text-align: center;
}

.file_drop_sag:hover {
  border-color: var(--accent_sag);
  background: var(--accent_light_sag);
}

.file_drop_sag.dragover_sag {
  border-color: var(--accent_sag);
  background: var(--accent_light_sag);
}

.file_drop_sag svg {
  width: 22px; height: 22px;
  margin-bottom: 2px;
}

.file_drop_sag span {
  font-size: 13px;
  color: var(--text_secondary_sag);
}

.file_drop_sag small {
  font-size: 11px;
  color: var(--text_muted_sag);
}