/* ════════════════════════════════════════
       SYZ ROD ENDS CALCULATOR DESIGN SYSTEM
       ════════════════════════════════════════ */
        .szr-calc-page {
      --bg-page: #FFFFFF;
      --bg-alt: #F4F7FA;
      --bg-subtle: #EEF2F6;
      --bg-dark: #1C2B3A;

      --brand-red: #C0392B;
      --brand-red-dark: #9B2D23;
      --brand-red-light: #FBEAE7;
      --brand-red-border: #F0C4BC;

      --text-main: #1C2B3A;
      --text-body: #2D3E50;
      --text-muted: #607080;
      --text-faint: #93A3B3;

      --accent-green: #059669;
      --accent-green-bg: #ECFDF5;
      --accent-amber: #D97706;
      --accent-amber-bg: #FFFBEB;
      --accent-blue: #1A6FA8;
      --accent-blue-bg: #E8F2F9;

      --border-color: #D0DCE8;
      --border-dark: #B8C8D8;

      --font-heading: 'Barlow Condensed', -apple-system, sans-serif;
      --font-body: 'Inter', -apple-system, sans-serif;
      --font-mono: 'DM Mono', monospace;

      --radius-sm: 4px;
      --radius-md: 6px;
      --radius-lg: 12px;
      --radius-xl: 16px;

      --shadow-card: 0 4px 16px rgba(28, 43, 58, 0.08);
      --shadow-hover: 0 10px 30px rgba(28, 43, 58, 0.14);
    }

    .szr-calc-page * { box-sizing: border-box; margin: 0; padding: 0; }
    .szr-calc-page { background-color: var(--bg-page); color: var(--text-body); font-family: var(--font-body); line-height: 1.7; -webkit-font-smoothing: antialiased; }
    .szr-calc-page a { color: inherit; text-decoration: none; transition: all 0.2s ease; }
    .szr-calc-page sup, .szr-calc-page sub { font-size: 68%; }

    .szr-calc-page .btn-primary {
      background: var(--brand-red); color: #FFFFFF; font-family: var(--font-heading);
      font-size: 13.5px; font-weight: 700; padding: 10px 20px; border-radius: var(--radius-md);
      border: none; cursor: pointer; transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px;
    }
    .szr-calc-page .btn-primary:hover { background: var(--brand-red-dark); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(178, 50, 46, 0.3); }
    .szr-calc-page .btn-secondary {
      background: #FFFFFF; color: var(--text-main); font-family: var(--font-heading);
      font-size: 13px; font-weight: 700; padding: 9px 16px; border-radius: var(--radius-md);
      border: 1px solid var(--border-dark); cursor: pointer; transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px;
    }
    .szr-calc-page .btn-secondary:hover { border-color: var(--text-main); }

    /* Hero Banner */
    .szr-calc-page .calc-hero {
      background: var(--bg-alt); border-bottom: 1px solid var(--border-color);
      padding: 60px 40px 50px 40px;
    }
    .szr-calc-page .hero-container { max-width: 1400px; margin: 0 auto; }

    .szr-calc-page .breadcrumb-row {
      font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
      margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
    }
    .szr-calc-page .badge-pill {
      font-family: var(--font-mono); font-size: 11px; font-weight: 700;
      background: var(--brand-red-light); color: var(--brand-red);
      border: 1px solid var(--brand-red-border); padding: 3px 10px; border-radius: 20px;
      display: inline-flex; align-items: center; gap: 6px; margin-bottom: 16px;
    }
    .szr-calc-page .badge-pulse { width: 6px; height: 6px; background: var(--brand-red); border-radius: 50%; }

    .szr-calc-page .hero-h1 {
      font-family: var(--font-heading); font-size: clamp(2.2rem, 5vw, 3.2rem);
      font-weight: 900; color: var(--text-main); line-height: 1.15;
      letter-spacing: -0.8px; margin-bottom: 16px; max-width: 960px;
    }
    .szr-calc-page .hero-lead {
      font-size: 16.5px; color: var(--text-muted); max-width: 860px;
      line-height: 1.65; margin-bottom: 20px;
    }

    .szr-calc-page .disclaimer-banner {
      background: var(--accent-amber-bg); border: 1px solid #FDE7C4; border-left: 4px solid var(--accent-amber);
      border-radius: var(--radius-md); padding: 14px 18px; margin-bottom: 28px;
      font-size: 13.5px; color: #7C4A03; max-width: 960px; display: flex; gap: 10px; align-items: flex-start;
    }
    .szr-calc-page .disclaimer-banner strong { color: #5C3800; }

    .szr-calc-page .calc-nav-tabs {
      display: flex; flex-wrap: wrap; gap: 10px;
      border-top: 1px solid var(--border-color); padding-top: 24px;
    }
    .szr-calc-page .tab-btn {
      font-family: var(--font-heading); font-size: 13.5px; font-weight: 700;
      padding: 10px 20px; border-radius: var(--radius-md); border: 1px solid var(--border-color);
      background: #FFFFFF; color: var(--text-main); cursor: pointer; transition: all 0.2s;
      display: flex; align-items: center; gap: 8px;
    }
    .szr-calc-page .tab-btn:hover { border-color: var(--text-main); }
    .szr-calc-page .tab-btn.active {
      background: var(--text-main); color: #FFFFFF; border-color: var(--text-main);
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }
    .szr-calc-page .tab-btn.active .tab-icon { color: #FF6567; }

    /* Main Calculator Studio */
    .szr-calc-page .studio-wrap { max-width: 1400px; margin: 50px auto 100px auto; padding: 0 40px; }

    .szr-calc-page .calc-module-pane { display: none; }
    .szr-calc-page .calc-module-pane.active { display: block; animation: fadeIn 0.25s ease-in-out; }
    @keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

    .szr-calc-page .calc-card-grid {
      display: grid; grid-template-columns: 1fr; gap: 40px;
      background: #FFFFFF; border: 1px solid var(--border-color);
      border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow-card);
    }
    @media (min-width: 1024px) { .szr-calc-page .calc-card-grid { grid-template-columns: 1.1fr 1fr; } }

    .szr-calc-page .module-header { margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--border-color); }
    .szr-calc-page .module-tag { font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: var(--brand-red); text-transform: uppercase; letter-spacing: 0.3px; }
    .szr-calc-page .module-h2 { font-family: var(--font-heading); font-size: 24px; font-weight: 800; color: var(--text-main); margin-top: 4px; }
    .szr-calc-page .module-p { font-size: 14px; color: var(--text-muted); margin-top: 4px; }

    /* Form Fields */
    .szr-calc-page .form-group { margin-bottom: 20px; }
    .szr-calc-page .field-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 6px; gap: 10px; }
    .szr-calc-page .field-title { font-family: var(--font-heading); font-size: 13.5px; font-weight: 700; color: var(--text-main); }
    .szr-calc-page .field-unit { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-muted); white-space: nowrap; }
    .szr-calc-page .field-input, .szr-calc-page .field-select {
      width: 100%; height: 44px; background: var(--bg-alt); border: 1px solid var(--border-color);
      border-radius: var(--radius-md); padding: 0 14px; font-family: var(--font-mono); font-size: 14px;
      color: var(--text-main); transition: border-color 0.2s;
    }
    .szr-calc-page .field-input:focus, .szr-calc-page .field-select:focus { outline: none; border-color: var(--brand-red); background: #FFFFFF; }
    .szr-calc-page .field-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
    .szr-calc-page .field-row { display: grid; grid-template-columns: 1fr 110px; gap: 10px; }
    .szr-calc-page .field-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
    .szr-calc-page .coord-group-label { font-family: var(--font-heading); font-size: 12.5px; font-weight: 700; color: var(--text-main); text-transform: uppercase; letter-spacing: 0.3px; margin: 18px 0 10px 0; padding-top: 14px; border-top: 1px solid var(--border-color); }
    .szr-calc-page .coord-group-label:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
    .szr-calc-page .example-btn-row { margin-bottom: 20px; }

    /* Results Output Box */
    .szr-calc-page .results-pane {
      background: var(--bg-alt); border: 1px solid var(--border-color);
      border-radius: var(--radius-lg); padding: 32px; display: flex; flex-direction: column; justify-content: space-between;
    }
    .szr-calc-page .res-top-tag { font-family: var(--font-mono); font-size: 11.5px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
    .szr-calc-page .res-hero-val {
      font-family: var(--font-heading); font-size: clamp(36px, 5.5vw, 52px); font-weight: 900;
      color: var(--brand-red); line-height: 1.05; margin: 12px 0 4px 0;
    }
    .szr-calc-page .res-secondary-val { font-family: var(--font-mono); font-size: 14px; color: var(--text-body); margin-bottom: 14px; }
    .szr-calc-page .res-status-note { font-size: 13.5px; font-weight: 600; color: var(--text-main); margin-bottom: 20px; display: flex; align-items: flex-start; gap: 8px; }

    /* Dynamic SVG Preview Box */
    .szr-calc-page .dynamic-svg-box {
      background: #FFFFFF; border: 1px solid var(--border-color);
      border-radius: var(--radius-md); padding: 16px; text-align: center; margin: 16px 0;
    }

    /* Formula Explanation Box */
    .szr-calc-page .formula-dock {
      background: #FFFFFF; border: 1px solid var(--border-color);
      border-radius: var(--radius-md); padding: 16px 20px; font-size: 12.5px; color: var(--text-muted);
      border-left: 4px solid var(--brand-red); margin-bottom: 14px;
    }
    .szr-calc-page .formula-dock strong { font-family: var(--font-heading); color: var(--text-main); display: block; margin-bottom: 4px; }
    .szr-calc-page .formula-dock .fd-row { margin: 8px 0; }
    .szr-calc-page .formula-dock .fd-label { font-family: var(--font-heading); font-weight: 700; color: var(--text-main); font-size: 11.5px; text-transform: uppercase; display: block; margin-bottom: 2px; }
    .szr-calc-page .formula-code { font-family: var(--font-mono); color: var(--text-main); font-size: 14px; display: block; margin: 4px 0; }
    .szr-calc-page .verify-note { background: var(--accent-green-bg); border: 1px solid #B7EBD0; border-radius: var(--radius-md); padding: 12px 16px; font-size: 12.5px; color: #065F35; margin-top: 10px; }
    .szr-calc-page .verify-note strong { color: #043D22; }

    .szr-calc-page details.assumptions-block { background: #FFFFFF; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 4px 20px; font-size: 12.5px; color: var(--text-muted); }
    .szr-calc-page details.assumptions-block summary { cursor: pointer; padding: 12px 0; font-family: var(--font-heading); font-weight: 700; color: var(--text-main); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.3px; }
    .szr-calc-page details.assumptions-block ul { padding: 0 0 14px 18px; }
    .szr-calc-page details.assumptions-block li { margin-bottom: 6px; }

    .szr-calc-page .ref-table-wrap { overflow-x: auto; margin-top: 12px; }
    .szr-calc-page table.ref-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 12px; }
    .szr-calc-page table.ref-table th, .szr-calc-page table.ref-table td { border: 1px solid var(--border-color); padding: 7px 10px; text-align: left; white-space: nowrap; }
    .szr-calc-page table.ref-table th { background: var(--bg-alt); font-family: var(--font-heading); font-size: 11px; text-transform: uppercase; color: var(--text-muted); }
    .szr-calc-page table.ref-table td.hl { color: var(--brand-red); font-weight: 700; }

    .szr-calc-page .mode-toggle { display: inline-flex; border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; margin-bottom: 20px; }
    .szr-calc-page .mode-toggle button { font-family: var(--font-heading); font-size: 12.5px; font-weight: 700; padding: 9px 16px; background: #FFFFFF; border: none; cursor: pointer; color: var(--text-muted); }
    .szr-calc-page .mode-toggle button.active { background: var(--text-main); color: #FFFFFF; }
    .szr-calc-page .advanced-only { display: none; }
    .szr-calc-page .advanced-only.show { display: block; }
    .szr-calc-page .basic-only.hide { display: none; }

    .szr-calc-page .compare-row { display: flex; gap: 12px; margin-top: 14px; }
    .szr-calc-page .compare-box { flex: 1; background: #FFFFFF; border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 12px 14px; }
    .szr-calc-page .compare-box.recommended { border-color: var(--brand-red); background: var(--brand-red-light); }
    .szr-calc-page .compare-box .cb-label { font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; color: var(--text-muted); }
    .szr-calc-page .compare-box .cb-val { font-family: var(--font-heading); font-size: 20px; font-weight: 800; color: var(--text-main); margin-top: 2px; }
    .szr-calc-page .compare-box.recommended .cb-val { color: var(--brand-red); }

    /* Engineering Review CTA */
    .szr-calc-page .review-cta-section {
      max-width: 1400px; margin: 0 auto 100px auto; padding: 0 40px;
    }
    .szr-calc-page .review-cta-card {
      background: var(--bg-dark); border-radius: var(--radius-xl); padding: 44px; color: #FFFFFF;
      display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 24px;
    }
    .szr-calc-page .review-cta-card h3 { font-family: var(--font-heading); font-size: 22px; font-weight: 800; margin-bottom: 8px; }
    .szr-calc-page .review-cta-card p { font-size: 14px; color: #B0B0B0; max-width: 560px; }
    .szr-calc-page .review-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .szr-calc-page .btn-white { background: #FFFFFF; color: var(--text-main); }
    .szr-calc-page .btn-white:hover { background: #F0F0F0; }
    .szr-calc-page .btn-outline-white { background: transparent; color: #FFFFFF; border: 1px solid #444444; }
    .szr-calc-page .btn-outline-white:hover { border-color: #FFFFFF; }

  

    /* standalone single-tool page: hero text should align with the card content edges below it, not the outer studio-wrap bounds */
    .szr-calc-page .hero-container { padding: 0 40px; }