/* ==========================================================
   tool.css — 도구 페이지 공통
   로드 대상: barcode-generator.html, qr-generator.html
   base.css + landing.css 이후에 로드
   ========================================================== */

/* ===== TOOL SECTION ===== */
/* 기본값 = 모바일 */
.tool-section {
    background: var(--gray-100);
    padding: 48px 16px;
  }
  
  .tool-card {
    background: var(--white);
    border-radius: 16px;
    padding: 24px 18px;
    max-width: 680px;
    margin: 0 auto;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  }
  
  .tool-field {
    margin-bottom: 20px;
  }
  
  .tool-label {
    display: block;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 8px;
    font-size: 0.95rem;
  }
  
  .tool-input {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
    color: var(--text);
    transition: border-color 0.2s;
  }
  
  .tool-input:focus {
    outline: none;
    border-color: var(--navy);
  }
  
  .tool-textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
    color: var(--text);
    resize: vertical;
    min-height: 100px;
    transition: border-color 0.2s;
  }
  
  .tool-textarea:focus {
    outline: none;
    border-color: var(--navy);
  }
  
  .tool-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 1rem;
    color: var(--text);
    background: var(--white);
    cursor: pointer;
    transition: border-color 0.2s;
  }
  
  .tool-select:focus {
    outline: none;
    border-color: var(--navy);
  }
  
  .tool-hint {
    font-size: 0.82rem;
    color: var(--gray-600);
    margin-top: 6px;
    line-height: 1.5;
  }
  
  .tool-error {
    font-size: 0.9rem;
    color: #c0392b;
    margin-top: 12px;
    padding: 10px 14px;
    background: #fdf2f2;
    border-radius: 6px;
    border-left: 3px solid #c0392b;
  }
  
  .tool-btn-row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }
  
  /* 네이비 아웃라인 버튼 */
  .btn-outline-navy {
    background: transparent;
    color: var(--navy);
    border: 2px solid var(--navy);
  }
  
  .btn-outline-navy:hover {
    background: var(--navy);
    color: var(--white);
  }
  
  /* ===== 미리보기 영역 ===== */
  .barcode-preview {
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: 10px;
    padding: 24px;
    flex-direction: column;
    gap: 12px;
  }
  
  .preview-placeholder {
    color: var(--gray-600);
    font-size: 0.9rem;
    text-align: center;
    line-height: 1.6;
  }
  
  .barcode-preview svg,
  .barcode-preview canvas {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
  }
  
  /* ===== QR 타입 선택 탭 ===== */
  .qr-type-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 20px;
  }
  
  /* 기본값 = 모바일 */
  .qr-type-btn {
    padding: 7px 12px;
    border: 2px solid var(--gray-200);
    border-radius: 20px;
    background: var(--white);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--gray-600);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
  }
  
  .qr-type-btn:hover {
    border-color: var(--navy);
    color: var(--navy);
  }
  
  .qr-type-btn.active {
    border-color: var(--navy);
    background: var(--navy);
    color: var(--white);
  }
  
  /* ===== QR 옵션 행 ===== */
  .qr-options-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 20px;
  }
  
  /* 기본값 = 모바일: 전체 너비 */
  .qr-option-group {
    flex: 1;
    min-width: 100%;
  }
  
  /* 색상 선택 */
  .color-row {
    display: flex;
    align-items: center;
    gap: 10px;
  }
  
  .color-picker-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .color-picker-wrap input[type="color"] {
    width: 40px;
    height: 40px;
    border: 2px solid var(--gray-200);
    border-radius: 6px;
    padding: 2px;
    cursor: pointer;
    background: none;
  }
  
  .color-picker-label {
    font-size: 0.82rem;
    color: var(--gray-600);
  }
  
  /* 크기 선택 */
  .size-btn-group {
    display: flex;
    gap: 6px;
  }
  
  .size-btn {
    flex: 1;
    padding: 8px 4px;
    border: 2px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--gray-600);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
  }
  
  .size-btn:hover {
    border-color: var(--navy);
    color: var(--navy);
  }
  
  .size-btn.active {
    border-color: var(--navy);
    background: var(--navy);
    color: var(--white);
  }
  
  /* ===== WiFi 전용 필드 ===== */
  .wifi-fields {
    display: grid;
    gap: 14px;
  }
  
  .wifi-security-row {
    display: flex;
    gap: 6px;
  }
  
  .wifi-security-btn {
    flex: 1;
    padding: 9px 4px;
    border: 2px solid var(--gray-200);
    border-radius: 6px;
    background: var(--white);
    font-family: 'Noto Sans KR', sans-serif;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--gray-600);
    cursor: pointer;
    text-align: center;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
  }
  
  .wifi-security-btn.active {
    border-color: var(--navy);
    background: var(--navy);
    color: var(--white);
  }
  
  /* ===== 구분선 ===== */
  .tool-divider {
    border: none;
    border-top: 1px solid var(--gray-200);
    margin: 20px 0;
  }
  
  /* ===== 활용 사례 섹션 ===== */
  .tool-use-section {
    background: var(--white);
  }
  
  /* 기본값 = 모바일: 1열 */
  .tool-use-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .tool-use-card {
    background: var(--gray-100);
    border-radius: 12px;
    padding: 28px 20px;
    text-align: center;
  }
  
  .tool-use-icon {
    font-size: 2.2rem;
    margin-bottom: 12px;
  }
  
  .tool-use-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 6px;
  }
  
  .tool-use-card p {
    font-size: 0.85rem;
    color: var(--gray-600);
    line-height: 1.6;
    word-break: keep-all;
  }
  
  /* ===== 소프트 CTA 섹션 ===== */
  .tool-cta-section {
    background: var(--gray-100);
    text-align: center;
  }
  
  .tool-cta-section .section-title {
    margin-bottom: 16px;
  }
  
  /* 기본값 = 모바일: column */
  .tool-cta-btns {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    justify-content: center;
    margin-top: 28px;
  }
  
  .tool-cta-btns .btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }
  
  /* ===== DESKTOP — TOOL ===== */
  @media (min-width: 481px) {
    .qr-type-tabs {
      gap: 8px;
    }
  
    .qr-type-btn {
      padding: 8px 16px;
      font-size: 0.88rem;
    }
  }
  
  @media (min-width: 769px) {
    .tool-section {
      padding: 80px 24px;
    }
  
    .tool-card {
      padding: 40px;
    }
  
    .qr-options-row {
      gap: 20px;
    }
  
    .qr-option-group {
      min-width: 140px;
    }
  
    .tool-use-grid {
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
  
    .tool-cta-btns {
      flex-direction: row;
      align-items: center;
    }
  
    .tool-cta-btns .btn {
      width: auto;
      max-width: none;
    }
  
    .wifi-security-row {
      gap: 10px;
    }
  }