:root {
      --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
      --font-body: 'Inter', system-ui, -apple-system, sans-serif;
      --color-brand-blue: #2453ff;
      --color-brand-hover: #1b42db;
      --color-brand-navy: #102746;
      --color-text-main: #0f172a;
      --color-text-muted: #64748b;
      --color-border: #e2e8f0;
      --color-bg-subtle: #f8fafc;
      --color-card-bg: #ffffff;
    }

    * { box-sizing: border-box; }

    body {
      margin: 0;
      font-family: var(--font-body);
      background-color: #ffffff;
      color: var(--color-text-main);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
    }

    /* Workspace Hero Container (123apps 1:1 Inspiration) */
    .tool-workspace-hero {
      text-align: center;
      padding: 40px 20px 24px;
      background: #ffffff;
      max-width: 900px;
      margin: 0 auto;
      width: 100%;
    }

    .tool-breadcrumb {
      font-size: 13px;
      font-weight: 600;
      color: var(--color-text-muted);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .tool-breadcrumb a {
      color: var(--color-text-muted);
      text-decoration: none;
    }

    .tool-breadcrumb a:hover {
      color: var(--color-brand-blue);
    }

    .tool-title {
      font-family: var(--font-display);
      font-size: clamp(28px, 4.5vw, 44px);
      font-weight: 800;
      color: var(--color-text-main);
      letter-spacing: -0.04em;
      margin: 0 0 12px;
      line-height: 1.15;
    }

    .tool-desc {
      font-size: clamp(14px, 2vw, 16px);
      font-weight: 500;
      color: var(--color-text-muted);
      margin: 0 auto 32px;
      max-width: 660px;
      line-height: 1.5;
    }

    /* Primary Workspace Card */
    .tool-workspace-card {
      max-width: 820px;
      margin: 0 auto 60px;
      width: 100%;
      background: var(--color-card-bg);
      border: 1.5px solid var(--color-border);
      border-radius: 20px;
      padding: 32px;
      box-shadow: 0 12px 36px rgba(15, 23, 42, 0.05);
    }

    /* 123apps-Style Upload Dropzone */
    .tools-dropzone {
      border: 2px dashed #cbd5e1;
      border-radius: 16px;
      padding: 56px 24px;
      text-align: center;
      background: var(--color-bg-subtle);
      cursor: pointer;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      outline: none;
    }

    .tools-dropzone:hover, .tools-dropzone:focus-visible {
      border-color: var(--color-brand-blue);
      background: #eff6ff;
    }

    .tools-dropzone-btn {
      background: var(--color-brand-blue);
      color: #ffffff;
      font-family: var(--font-display);
      font-size: 16px;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 10px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
      box-shadow: 0 4px 14px rgba(36, 83, 255, 0.25);
    }

    .tools-dropzone-sub {
      font-size: 14px;
      font-weight: 500;
      color: var(--color-text-muted);
    }

    .tools-dropzone-badges {
      display: flex;
      gap: 12px;
      margin-top: 18px;
      flex-wrap: wrap;
      justify-content: center;
    }

    .badge-pill {
      font-size: 12px;
      font-weight: 600;
      color: #475569;
      background: #e2e8f0;
      padding: 4px 10px;
      border-radius: 20px;
    }

    /* Active Conversion Workspace */
    .conversion-panel {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

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

    .panel-filename {
      font-family: var(--font-display);
      font-size: 16px;
      font-weight: 700;
      color: var(--color-text-main);
      margin: 0;
    }

    .specs-badge {
      font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
      font-size: 12px;
      font-weight: 600;
      background: #f1f5f9;
      color: #334155;
      padding: 4px 10px;
      border-radius: 6px;
      border: 1px solid var(--color-border);
    }

    /* Live Preview Stage */
    .preview-stage {
      min-height: 280px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      border: 1px solid var(--color-border);
      border-radius: 12px;
      padding: 16px;
      position: relative;
    }

    /* Options & Background Selector */
    .settings-row {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .setting-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      text-align: left;
    }

    .setting-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--color-text-main);
    }

    .setting-select {
      font-family: var(--font-body);
      font-size: 14px;
      font-weight: 500;
      padding: 8px 14px;
      border: 1.5px solid var(--color-border);
      border-radius: 8px;
      background: #ffffff;
      color: var(--color-text-main);
      outline: none;
      min-width: 220px;
    }

    .setting-select:focus {
      border-color: var(--color-brand-blue);
    }

    /* Progress Bar */
    .progress-box {
      background: #f8fafc;
      border: 1px solid var(--color-border);
      border-radius: 12px;
      padding: 16px 20px;
    }

    .status-msg {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--color-text-main);
      margin: 0 0 10px;
      text-align: center;
    }

    .progress-track {
      width: 100%;
      height: 10px;
      background: #e2e8f0;
      border-radius: 6px;
      overflow: hidden;
    }

    .progress-fill {
      height: 100%;
      width: 0%;
      background: var(--color-brand-blue);
      border-radius: 6px;
    }

    /* Action Buttons */
    .action-buttons-wrap {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn-action {
      font-family: var(--font-display);
      font-size: 15px;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: 10px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      border: none;
    }

    .btn-convert {
      background: var(--color-brand-blue);
      color: #ffffff;
    }

    .btn-convert:hover {
      background: var(--color-brand-hover);
    }

    .btn-cancel {
      background: #f1f5f9;
      color: #334155;
      border: 1px solid var(--color-border);
    }

    .btn-cancel:hover {
      background: #e2e8f0;
      color: #0f172a;
    }

    .btn-download {
      background: #16a34a;
      color: #ffffff;
    }

    .btn-download:hover {
      background: #15803d;
    }

    /* Guide & FAQ Sections (123apps Layout Pattern) */
    .tool-guide-wrap {
      max-width: 860px;
      margin: 0 auto 80px;
      width: 100%;
      padding: 0 20px;
    }

    .guide-section-title {
      font-family: var(--font-display);
      font-size: 24px;
      font-weight: 800;
      color: var(--color-text-main);
      text-align: center;
      margin: 0 0 36px;
      letter-spacing: -0.03em;
    }

    /* Steps Grid */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(1, 1fr);
      gap: 20px;
      margin-bottom: 60px;
    }

    @media (min-width: 640px) {
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .step-card {
      background: var(--color-bg-subtle);
      border: 1px solid var(--color-border);
      border-radius: 12px;
      padding: 20px;
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: #d6fd70;
      color: #0f172a;
      font-family: var(--font-display);
      font-weight: 800;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .step-content h4 {
      font-family: var(--font-display);
      font-size: 15px;
      font-weight: 700;
      margin: 0 0 6px;
    }

    .step-content p {
      font-size: 13px;
      line-height: 1.5;
      color: var(--color-text-muted);
      margin: 0;
    }

    /* Feature Pillars */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(1, 1fr);
      gap: 18px;
      margin-bottom: 60px;
    }

    @media (min-width: 768px) {
      .features-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .feature-card {
      border: 1px solid var(--color-border);
      border-radius: 12px;
      padding: 24px;
      background: #ffffff;
    }

    .feature-card h4 {
      font-family: var(--font-display);
      font-size: 15px;
      font-weight: 700;
      margin: 0 0 8px;
    }

    .feature-card p {
      font-size: 13px;
      line-height: 1.5;
      color: var(--color-text-muted);
      margin: 0;
    }

    /* FAQ Cards */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      border: 1px solid var(--color-border);
      border-radius: 10px;
      padding: 18px 20px;
      background: #ffffff;
    }

    .faq-question {
      font-family: var(--font-display);
      font-size: 15px;
      font-weight: 700;
      color: var(--color-text-main);
      margin: 0 0 8px;
    }

    .faq-answer {
      font-size: 13.5px;
      line-height: 1.5;
      color: var(--color-text-muted);
      margin: 0;
    }

    /* Zero Animation Rule */
    *, *::before, *::after {
      animation: none !important;
      transition: none !important;
    }
  
/* ==============================================================================
 * Comprehensive SEO Content & Discovery Framework
 * ============================================================================== */
.tool-guide-section {
  max-width: 900px;
  margin: 40px auto 0;
  padding: 0 20px;
  width: 100%;
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 20px;
}
.guide-step {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  position: relative;
}
.step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #2453ff;
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}
.step-title {
  font-family: var(--font-display, inherit);
  font-weight: 700;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 6px;
}
.step-desc {
  font-size: 12.5px;
  line-height: 1.5;
  color: #64748b;
}

.tool-specs-section {
  max-width: 900px;
  margin: 36px auto 0;
  padding: 0 20px;
  width: 100%;
}
.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.specs-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 18px 20px;
}
.specs-icon {
  font-size: 22px;
  margin-bottom: 8px;
}
.specs-title {
  font-family: var(--font-display, inherit);
  font-weight: 700;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 6px;
}
.specs-desc {
  font-size: 12.5px;
  line-height: 1.5;
  color: #64748b;
}

.tool-faq-section {
  max-width: 900px;
  margin: 40px auto 0;
  padding: 0 20px;
  width: 100%;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px 20px;
}
.faq-q {
  font-family: var(--font-display, inherit);
  font-weight: 700;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 6px;
}
.faq-a {
  font-size: 13px;
  line-height: 1.55;
  color: #475569;
}

.related-tools-section {
  max-width: 900px;
  margin: 44px auto 60px;
  padding: 0 20px;
  width: 100%;
}
.related-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin-top: 16px;
}
.related-tool-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.related-tool-card:hover {
  border-color: #2453ff;
  transform: translateY(-2px);
}
.related-tool-name {
  font-family: var(--font-display, inherit);
  font-weight: 700;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 6px;
}
.related-tool-desc {
  font-size: 12px;
  line-height: 1.45;
  color: #64748b;
}