:root{--blue-zone:#5B8DEE;--blue-zone-light:#E8F1FD;--green-zone:#34A853;--green-zone-light:#E6F4EA;--yellow-zone:#FBBC04;--yellow-zone-light:#FEF7E0;--red-zone:#EA4335;--red-zone-light:#FCE8E6;--ocean-deep:#0D1B2A;--ocean-dark:#1B263B;--ocean-medium:#415A77;--ocean-light:#778DA9;--ocean-foam:#E0E1DD;--ocean-sand:#F5F5F0;--seafoam:#4ECDC4;--pearl:#F8F9FA;--font-display:'Playfair Display',Georgia,serif;--font-body:'Source Sans Pro',-apple-system,BlinkMacSystemFont,sans-serif;--font-mono:'JetBrains Mono','Consolas',monospace;--space-xs:0.25rem;--space-sm:0.5rem;--space-md:1rem;--space-lg:1.5rem;--space-xl:2rem;--space-2xl:3rem;--space-3xl:4rem;--radius-md:8px;--radius-lg:12px;--radius-xl:20px;--radius-full:9999px;--shadow-lg:0 10px 25px rgba(0,0,0,0.1);--transition-fast:150ms ease;--transition-base:250ms ease;}
    *,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
    html{font-size:16px;scroll-behavior:smooth;}
    body{font-family:var(--font-body);font-size:1.0625rem;line-height:1.7;color:var(--ocean-dark);background:var(--ocean-sand);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}
    h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;color:var(--ocean-deep);}
    h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-top:var(--space-3xl);margin-bottom:var(--space-lg);}
    h3{font-size:clamp(1.25rem,2.2vw,1.6rem);margin-top:var(--space-2xl);margin-bottom:var(--space-md);}
    h4{font-size:1.1rem;margin-top:var(--space-lg);margin-bottom:var(--space-sm);font-family:var(--font-body);font-weight:600;}
    p{margin-bottom:var(--space-md);}
    a{color:var(--blue-zone);text-decoration:none;}

    h2[id],h3[id],h4[id]{scroll-margin-top:var(--space-xl);}

    .skip-link{position:absolute;top:-40px;left:0;background:var(--ocean-deep);color:white;padding:var(--space-md) var(--space-lg);z-index:10000;text-decoration:none;font-weight:600;border-radius:0 0 var(--radius-md) 0;transition:top var(--transition-fast);}
    .skip-link:focus{top:0;outline:3px solid var(--seafoam);outline-offset:2px;}
    .visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

    .nav-sidebar{position:fixed;top:0;left:0;width:280px;height:100vh;background:linear-gradient(180deg,var(--ocean-deep) 0%,var(--ocean-dark) 100%);overflow-y:auto;z-index:1000;padding:var(--space-xl);transform:translateX(0);transition:transform var(--transition-base);}
    .nav-sidebar.open{transform:translateX(0);}
    .nav-logo{display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-2xl);padding-bottom:var(--space-lg);border-bottom:1px solid rgba(255,255,255,0.1);}
    .nav-logo-icon{width:48px;height:48px;background:linear-gradient(135deg,var(--blue-zone) 0%,var(--seafoam) 100%);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:1.5rem;}
    .nav-logo-text{color:white;font-family:var(--font-display);font-size:1.125rem;font-weight:600;line-height:1.2;}
    .nav-logo-text span{display:block;font-size:0.75rem;font-family:var(--font-body);font-weight:400;opacity:0.7;margin-top:2px;}
    .nav-section{margin-bottom:var(--space-xl);}
    .nav-section-title{font-size:0.6875rem;font-weight:600;text-transform:uppercase;letter-spacing:0.1em;color:var(--ocean-light);margin-bottom:var(--space-sm);padding-left:var(--space-sm);}
    .nav-section--priority{background:rgba(78,205,196,0.1);margin:0 calc(-1 * var(--space-md));padding:var(--space-sm) var(--space-md);border-left:3px solid var(--seafoam);}
    .nav-list{list-style:none;}
    .nav-link{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);color:var(--ocean-foam);font-size:0.9375rem;border-radius:var(--radius-md);}
    .nav-link:hover{background:rgba(255,255,255,0.1);color:white;}
    .nav-link.active{background:rgba(255,255,255,0.15);color:white;font-weight:700;}
    .nav-link-icon{width:20px;text-align:center;opacity:0.8;}
    .nav-sublist{list-style:none;margin-left:var(--space-xl);margin-top:var(--space-xs);}
    .nav-sublink{display:block;padding:var(--space-xs) var(--space-sm);color:var(--ocean-light);font-size:0.875rem;border-radius:6px;}
    .nav-sublink:hover{color:white;background:rgba(255,255,255,0.05);}
    .nav-sublink.active{color:white;background:rgba(255,255,255,0.08);font-weight:700;}
    .nav-badge{font-size:0.625rem;padding:2px 6px;border-radius:var(--radius-full);margin-left:auto;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;}
    .nav-badge--essential{background:var(--seafoam);color:var(--ocean-deep);}
    .nav-link--highlight{background:rgba(78,205,196,0.15);}

    .nav-search{position:relative;padding:0 var(--space-md);margin-bottom:var(--space-md);}
    .nav-search-input{width:100%;padding:var(--space-sm) var(--space-md);border:1px solid var(--ocean-medium);border-radius:var(--radius-md);background:var(--ocean-dark);color:var(--ocean-foam);font-size:0.875rem;}
    .nav-search-input::placeholder{color:var(--ocean-light);}
    .nav-search-results{position:absolute;top:100%;left:var(--space-md);right:var(--space-md);background:var(--ocean-deep);border-radius:var(--radius-md);max-height:300px;overflow-y:auto;display:none;z-index:1000;box-shadow:var(--shadow-lg);}
    .nav-search-results.active{display:block;}
    .nav-search-result{padding:var(--space-sm) var(--space-md);border-bottom:1px solid var(--ocean-dark);cursor:pointer;}
    .nav-search-result:hover{background:var(--ocean-medium);}
    .nav-search-result-title{font-weight:600;color:var(--pearl);font-size:0.875rem;}
    .nav-search-result-section{font-size:0.75rem;color:var(--ocean-light);}

    .nav-progress{margin-top:auto;padding-top:var(--space-xl);border-top:1px solid rgba(255,255,255,0.1);}
    .nav-progress-label{font-size:0.75rem;color:var(--ocean-light);margin-bottom:var(--space-sm);}
    .nav-progress-bar{height:4px;background:rgba(255,255,255,0.1);border-radius:var(--radius-full);overflow:hidden;}
    .nav-progress-fill{height:100%;background:linear-gradient(90deg,var(--blue-zone) 0%,var(--green-zone) 50%,var(--seafoam) 100%);border-radius:var(--radius-full);transition:width 400ms ease;}

    .main-content{margin-left:280px;min-height:100vh;transition:margin-left var(--transition-base);}
    .cover{position:relative;min-height:60vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--ocean-deep) 0%,var(--ocean-dark) 50%,var(--ocean-medium) 100%);overflow:hidden;}
    .cover-content{position:relative;z-index:1;text-align:center;padding:var(--space-3xl);max-width:900px;}
    .cover-badge{display:inline-flex;align-items:center;gap:var(--space-sm);background:rgba(255,255,255,0.1);backdrop-filter:blur(10px);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-full);font-size:0.875rem;font-weight:600;color:var(--seafoam);margin-bottom:var(--space-xl);border:1px solid rgba(255,255,255,0.1);}
    .cover-title{color:white;margin-bottom:var(--space-lg);}
    .cover-subtitle{font-family:var(--font-display);font-size:clamp(1.1rem,2.2vw,1.6rem);font-weight:400;font-style:italic;color:var(--ocean-foam);margin-bottom:var(--space-xl);opacity:0.9;}
    .cover-description{font-size:1.05rem;color:var(--ocean-light);max-width:700px;margin:0 auto;line-height:1.8;}
    .container{max-width:1100px;margin:0 auto;padding:0 var(--space-xl);}
    .section{padding:var(--space-3xl) 0;}
    .section--light{background:white;}

    .doc-rule{border:0;border-top:1px solid var(--ocean-foam);margin:var(--space-lg) 0;}
    .toc-list{margin:var(--space-md) 0 0;padding-left:1.2rem;}
    .toc-list li{margin:0.4rem 0;}
    .toc-list a{font-weight:600;}

    ul{padding-left:1.2rem;margin:0.75rem 0 1.25rem;}
    li{margin:0.35rem 0;}

    .callout{border:1px solid var(--ocean-foam);border-left:4px solid var(--seafoam);background:linear-gradient(135deg, #ffffff 0%, var(--ocean-sand) 100%);border-radius:var(--radius-lg);padding:var(--space-lg);margin:var(--space-lg) 0;}
    .callout-title{font-weight:700;color:var(--ocean-deep);margin-bottom:0.35rem;}
    .callout-body{color:var(--ocean-dark);}
    .callout--tip{border-left-color:var(--green-zone);}

    .keyline{display:flex;flex-wrap:wrap;gap:0.4rem;align-items:baseline;padding:0.6rem 0;border-bottom:1px dashed var(--ocean-foam);}
    .keyline-label{font-weight:700;color:var(--ocean-medium);font-family:var(--font-mono);font-size:0.9rem;}
    .keyline-value{color:var(--ocean-dark);}

    .check-list{list-style:none;padding-left:0;}
    .check-item{display:flex;gap:0.6rem;align-items:flex-start;padding:0.35rem 0;}
    .check-item input[type="checkbox"]{width:18px;height:18px;margin-top:0.15rem;accent-color:var(--green-zone);}
    .check-text{flex:1;}

    .intro-card{background:linear-gradient(135deg, #ffffff 0%, var(--blue-zone-light) 100%);border:1px solid var(--ocean-foam);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:var(--space-2xl);margin:0 0 var(--space-2xl);}
    .intro-card{scroll-margin-top:var(--space-xl);}
    .intro-badge{display:inline-flex;align-items:center;gap:0.4rem;background:rgba(91,141,238,0.15);color:var(--blue-zone);border:1px solid rgba(91,141,238,0.25);padding:0.25rem 0.75rem;border-radius:var(--radius-full);font-weight:700;font-size:0.8rem;letter-spacing:0.02em;}
    .intro-title{margin-top:0.75rem;margin-bottom:0.25rem;}
    .intro-subtitle{font-family:var(--font-display);font-style:italic;color:var(--ocean-medium);font-size:1.2rem;margin-bottom:0.75rem;}
    .intro-tagline{color:var(--ocean-dark);margin-bottom:1rem;}
    .intro-meta{display:flex;flex-wrap:wrap;gap:0.5rem;margin:0.75rem 0 1.25rem;}
    .intro-meta-item{font-family:var(--font-mono);font-size:0.85rem;background:rgba(255,255,255,0.7);border:1px solid var(--ocean-foam);padding:0.25rem 0.6rem;border-radius:var(--radius-md);color:var(--ocean-medium);}
    .intro-highlights{list-style:none;padding-left:0;margin:0;display:grid;gap:0.5rem;}
    .intro-highlights li{display:flex;gap:0.6rem;align-items:flex-start;padding:0.35rem 0;}
    .intro-highlights li::before{content:'✓';display:flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--green-zone-light);color:var(--green-zone);font-weight:800;flex-shrink:0;margin-top:0.1rem;}

    .back-to-top{display:inline-flex;align-items:center;gap:0.35rem;margin:0.25rem 0 var(--space-xl);font-size:0.9rem;color:var(--ocean-medium);text-decoration:none;}
    .back-to-top:hover{color:var(--blue-zone);}
    .back-to-top::before{content:'↑';font-weight:700;}

    @media (max-width:1024px){
      .nav-sidebar{transform:translateX(-100%);}
      .nav-sidebar.open{transform:translateX(0);}
      .main-content{margin-left:0;}
      .nav-toggle{display:flex;position:fixed;top:var(--space-md);left:var(--space-md);z-index:1001;background:var(--ocean-deep);color:white;border:none;border-radius:var(--radius-md);width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-lg);}
    }
    @media (min-width:1025px){.nav-toggle{display:none;}}

    @media print{
      /* Hide navigation/UI */
      .nav-sidebar,.nav-toggle,.nav-search,.nav-progress,.back-to-top{display:none !important;}

      /* Layout + color */
      .main-content{margin-left:0 !important;}
      body{font-size:11pt;line-height:1.35;background:white !important;color:#000 !important;}
      a{color:#000 !important;text-decoration:underline;}

      /* Page break control */
      #table-of-contents{break-after:page;page-break-after:always;}
      /* Force a clean start for the guide content */
      #content h2[id^="section-1-"]{break-before:page;page-break-before:always;}

      /* Cover shouldn't waste a page */
      .cover{min-height:auto !important;background:white !important;}
      .cover-content{padding:1rem !important;max-width:none !important;}
      .cover-badge{display:none !important;}
      .cover-title{color:#000 !important;margin:0 0 0.25rem 0 !important;}
      .cover-subtitle{color:#000 !important;margin:0 0 0.5rem 0 !important;}
      .cover-description{display:none !important;}

      /* Reduce vertical whitespace */
      .section{padding:0.75rem 0 !important;}
      h2{margin-top:1rem !important;margin-bottom:0.5rem !important;font-size:16pt !important;}
      h3{margin-top:0.9rem !important;margin-bottom:0.4rem !important;font-size:13pt !important;}
      h4{margin-top:0.7rem !important;margin-bottom:0.35rem !important;font-size:11pt !important;}
      p{margin-bottom:0.4rem !important;}
      ul{margin:0.35rem 0 0.6rem !important;}

      /* Reduce orphan headings (keeps headings with following content when possible) */
      h2,h3,h4{break-after:avoid;page-break-after:avoid;}

      /* Strip decorative effects */
      .intro-card,.callout{box-shadow:none !important;background:white !important;}
      .intro-card{border:1px solid #ccc !important;}
      .callout{border:1px solid #ccc !important;border-left:4px solid #666 !important;}

      /* Help prevent awkward breaks */
      .intro-card,.callout{break-inside:avoid;page-break-inside:avoid;}
    }