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1.25rem;background:#f4f4f4;border-radius:6px;font-family:monospace;font-size:12px;line-height:2.2}.section-divider{border:0;height:1px;background:#e2e8f0;margin:2rem 0}.flex-wrap-gap{display:flex;gap:1rem;flex-wrap:wrap;margin:1rem 0}.info-card{background:#fff;padding:12px;border-radius:6px;border:1px solid #e2e8f0}.content-image{max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.1)}.mono{font-family:monospace}.hidden{display:none}.mb-2{margin-bottom:2rem}.mt-1{margin-top:1.25rem}.mt-xs{margin-top:.75rem}.badge{display:inline-block;font-size:11px;border-radius:4px;padding:2px 8px;font-weight:600}.badge-orange{background:#fff3e0;color:var(--orange);border:1px solid var(--orange);margin-left:8px}.license-header{display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem}.license-figure{max-width:20%;margin-right:5pt;flex-shrink:0}.license-header p{font-size:14px;color:#555;margin:0}.highlight-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px, 1fr));gap:1rem;margin:1.25rem 0}.highlight-grid .highlight{margin:0;height:100%;box-sizing:border-box}.krypto-components-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px, 1fr));gap:1rem;margin:1.25rem 0}.component-card{background:#fff;border:1px solid #e2e8f0;border-left:4px solid var(--blue);border-radius:var(--radius);padding:1rem;box-shadow:var(--shadow);display:flex;flex-direction:column}.component-card h5{margin:0 0 .5rem;font-size:15px;color:var(--navy);font-weight:700}.component-card p{margin:0 !important;font-size:13.5px;line-height:1.5;color:#334155}.attack-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px, 1fr));gap:1.25rem;margin:1.5rem 0}.attack-card{background:var(--gray-light);border:1px solid #e2e8f0;border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;transition:transform .2s ease,box-shadow .2s ease}.attack-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,42,74,.12)}.attack-image-wrapper{background:#fff;border-radius:var(--radius);padding:.5rem;width:100%;max-width:180px;height:110px;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;border:1px solid #e2e8f0}.attack-image-wrapper img{max-width:100%;max-height:100%;object-fit:contain;display:block}.attack-content{width:100%;text-align:left}.attack-card h5{margin:0 0 .5rem;font-size:16px;color:var(--navy);font-weight:700;border-bottom:2px solid #e2e8f0;padding-bottom:.25rem}.attack-card p{margin:0 !important;font-size:13.5px;line-height:1.5;color:#334155}.frequency-analysis-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px, 1fr));gap:1.5rem;margin:1.5rem 0}.frequency-card{background:#f4f5f7;border:1px solid #e2e8f0;border-radius:8px;padding:1rem;text-align:center;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease}.frequency-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,42,74,.12)}.frequency-card img{max-width:100%;height:auto;border-radius:8px;border:1px solid #e2e8f0;margin-bottom:.75rem;cursor:pointer}.frequency-card figcaption{font-size:13px;color:#64748b;font-style:italic;margin-top:.5rem}.secret-message-card{background:#fff;border:1px solid #e2e8f0;border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow);margin:1.5rem 0;display:flex;flex-direction:column;align-items:center;gap:1.25rem}.secret-message-image{max-width:100%;width:100%;max-width:400px;border-radius:var(--radius);border:1px solid #e2e8f0;box-shadow:0 2px 6px rgba(26,42,74,.06)}.secret-message-image figcaption{margin-top:.75rem;text-align:center;font-size:13px;color:#64748b;font-style:italic}.cipher-text-box{background:#f8f9fa;border:2px solid var(--navy);border-radius:var(--radius);padding:1.5rem;font-family:'Courier New',monospace;font-size:14px;line-height:1.8;text-align:center;color:var(--navy);letter-spacing:.05em;width:100%;max-width:500px;margin:1rem auto !important;overflow-x:auto}.cipher-text-box .line{margin:.5rem 0}.comm-diagram{display:flex;align-items:center;justify-content:center;padding:1.25rem;background:var(--gray-light);border-radius:var(--radius-lg);margin:1.25rem 0;flex-wrap:wrap;gap:.5rem}.comm-node{background:var(--orange);color:#fff;border-radius:50%;width:75px;height:75px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;text-align:center;box-shadow:var(--shadow);flex-shrink:0}.comm-arrow{flex:1;min-width:120px;max-width:260px;display:flex;flex-direction:column;align-items:center;gap:4px}.comm-arrow-label{background:var(--navy);color:#fff;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600;text-align:center;width:100%}.comm-arrow-line{width:100%;height:3px;background:var(--navy);position:relative}.comm-arrow-line:after{content:'▶';position:absolute;right:-1px;top:50%;transform:translateY(-50%);color:var(--navy);font-size:12px}:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:3px}:focus:not(:focus-visible){outline:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--blue);outline-offset:3px}@media (max-width:900px){.sidebar-left{transform:translateX(-100%)}#sidebar-collapse-btn{left:0 !important}.main-content{max-width:100%;padding:1.5rem 1.25rem;border-radius:0;box-shadow:none}.site-container{margin:0 auto;padding:0}.main-menu{justify-content:flex-start;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.main-menu::-webkit-scrollbar{display:none}.main-menu a{white-space:nowrap;padding:13px 16px}.main-menu .sub-menu,.dropdown{display:none !important}.breadcrumbs-container{padding:0 12px}.gsg-tabs{overflow-x:auto;flex-wrap:nowrap}.gsg-tab-btn{white-space:nowrap;padding:10px 14px;font-size:14px}}.wide-embed{position:relative;left:50%;transform:translateX(-50%);width:min(980px, calc(100vw - 40px));margin-bottom:2rem}.wide-embed iframe{width:100%;border:none;border-radius:var(--radius);display:block;min-height:100vh}@media (max-width:900px){.wide-embed{width:calc(100vw - 24px)}}.vigenere-sidebar,.image-viewer-sidebar{position:fixed;right:0;top:0;width:560px;height:100vh;background:#fff;box-shadow:-4px 0 20px rgba(0,0,0,.18);z-index:var(--z-modal);display:flex;flex-direction:column;border-left:4px solid var(--blue);transform:translateX(100%);transition:transform .35s cubic-bezier(.4,0,.2,1)}.vigenere-sidebar.is-open,.image-viewer-sidebar.is-open{transform:translateX(0)}.panel-header{padding:14px 18px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;gap:12px}.panel-header-title{font-size:15px;font-weight:700;margin:0;line-height:1.3;display:flex;align-items:center;gap:8px}.panel-header-close{background:rgba(255,255,255,.2);border:none;color:#fff;font-size:18px;width:34px;height:34px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .2s;flex-shrink:0;line-height:1}.panel-header-close:hover{background:rgba(255,255,255,.38)}.panel-info-bar{padding:10px 16px;flex-shrink:0;background:var(--gray-light);border-bottom:1px solid rgba(0,0,0,.07)}.panel-info-bar p{font-size:12px;color:var(--text-secondary);margin:0 0 6px}.panel-info-bar p:last-child{margin-bottom:0}.panel-info-indicator{padding:7px 10px;background:#fff;border-left:4px solid var(--orange);border-radius:4px;font-size:12px;color:var(--text-primary)}.panel-content,.sidebar-scroll-content{overflow:auto;flex:1;padding:16px}.panel-image-figure{margin:0;display:flex;flex-direction:column;align-items:center;gap:12px}.panel-image{width:100%;height:auto;border-radius:var(--radius);box-shadow:0 4px 16px rgba(0,0,0,.12);cursor:pointer;transition:transform .2s ease,box-shadow .2s ease;display:block}.panel-image:hover{transform:scale(1.015);box-shadow:0 6px 20px rgba(0,0,0,.18)}.panel-image-caption{text-align:center;font-size:.875rem;color:var(--text-secondary);font-style:italic;line-height:1.5;width:100%}.panel-hint{margin-top:16px;padding:10px 14px;background:var(--blue-light);border-radius:var(--radius);border-left:3px solid var(--blue);font-size:.85rem;color:#0c3a5c}.image-viewer-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.88);z-index:calc(var(--z-modal) + 10);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease}.image-viewer-modal.is-open{opacity:1;visibility:visible}.image-viewer-modal-content{position:relative;max-width:90vw;max-height:90vh;display:flex;flex-direction:column;align-items:center;animation:zoomIn .3s cubic-bezier(.4,0,.2,1)}@keyframes zoomIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.image-viewer-modal-img{max-width:100%;max-height:calc(90vh - 60px);width:auto;height:auto;border-radius:var(--radius);box-shadow:0 10px 40px rgba(0,0,0,.4)}.image-viewer-modal-close{position:absolute;top:-45px;right:0;background:rgba(255,255,255,.2);border:none;color:#fff;font-size:26px;cursor:pointer;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:background-color .2s}.image-viewer-modal-close:hover{background:rgba(255,255,255,.35)}.image-viewer-modal-caption{margin-top:1.25rem;color:rgba(255,255,255,.85);text-align:center;font-size:.9rem;font-style:italic}@media (max-width:720px){.vigenere-sidebar,.image-viewer-sidebar{width:100%;top:auto;bottom:0;height:75vh;border-left:none;border-top:4px solid var(--blue);transform:translateY(100%)}.vigenere-sidebar.is-open,.image-viewer-sidebar.is-open{transform:translateY(0)}}