:root{--background:#eef4f3;--foreground:#23212a;--panel:#fff;--panel-soft:#f7faf9;--line:#d8e0dd;--line-strong:#bccac6;--muted:#626b73;--teal:#0f766e;--teal-dark:#0b4f4a;--amber:#b45309;--wine:#8f2547;--ink:#23212a;--shadow:0 20px 55px #23292d1a}*{box-sizing:border-box}html{min-height:100%}body{background:linear-gradient(90deg, #0f766e1a, transparent 42%), linear-gradient(180deg, #8f254714, transparent 360px), var(--background);min-height:100%;color:var(--foreground);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{border:1px solid var(--line);min-height:44px;color:var(--ink);cursor:pointer;background:#fff;border-radius:8px;transition:transform .16s,border-color .16s,background .16s,box-shadow .16s}button:hover:not(:disabled){border-color:var(--teal);transform:translateY(-1px);box-shadow:0 10px 20px #0f766e1f}button:disabled{cursor:not-allowed;opacity:.52}textarea,input{border:1px solid var(--line);width:100%;color:var(--foreground);background:#fbfcfc;border-radius:8px;outline:none}textarea:focus,input:focus{border-color:var(--teal);box-shadow:0 0 0 4px #0f766e1f}textarea{resize:vertical;min-height:142px;padding:14px;line-height:1.55}input{height:42px;padding:0 12px}table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:12px 10px}th{color:var(--muted);text-transform:uppercase;font-size:.74rem}td{font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.86rem}td small,td em{color:var(--muted);margin-top:4px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.76rem;font-style:normal;display:block}td code,.guide-card code,.explain-panel code{color:var(--teal-dark);background:#e8f5f2;border-radius:6px;padding:2px 6px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.82rem;display:inline-block}.app-shell{gap:18px;width:min(1680px,100% - 40px);margin:0 auto;padding:24px 0 38px;display:grid}.hero-panel,.panel,.side-card,.explain-panel{box-shadow:var(--shadow);background:#fffffff5;border:1px solid #d8e0ddf2;border-radius:8px}.hero-panel{padding:24px}.panel,.side-card,.explain-panel{padding:18px}.titlebar{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px;margin-bottom:18px;display:grid}.eyebrow{color:var(--teal);letter-spacing:0;text-transform:uppercase;margin:0 0 7px;font-size:.74rem;font-weight:850}h1,h2,h3{color:var(--ink);letter-spacing:0;margin:0}h1{font-size:clamp(2rem,3vw,3.05rem);line-height:1.02}h2{font-size:1.16rem}h3{font-size:1rem}.hero-copy,.plain-help,.key-help,.side-card p,.explain-panel p{color:var(--muted);margin:9px 0 0;line-height:1.55}.hero-copy{max-width:860px;font-size:1rem}.rsa-badge{border:2px solid var(--teal);background:radial-gradient(circle,#fff 0 37%,#0000 38%),conic-gradient(from 20deg,#0f766e,#b45309,#8f2547,#0f766e);border-radius:50%;place-items:center;width:86px;height:86px;display:grid;box-shadow:inset 0 0 0 10px #ffffffd1}.rsa-badge strong{color:var(--ink);font-size:1.05rem}.rsa-badge span{color:var(--amber);text-transform:uppercase;font-size:.68rem;font-weight:900}.mode-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.mode-cards button{text-align:left;gap:6px;min-height:104px;padding:16px;display:grid}.mode-cards button strong{color:var(--ink);font-size:1.12rem}.mode-cards button span{color:var(--muted)}.mode-cards button small{color:var(--teal-dark);overflow-wrap:anywhere;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.78rem}.mode-cards button.active{border-color:var(--teal);background:linear-gradient(#effaf7,#fff);box-shadow:inset 0 0 0 2px #0f766e24}.workspace-grid{grid-template-columns:minmax(280px,340px) minmax(420px,1fr) minmax(280px,340px);align-items:start;gap:18px;display:grid}.left-rail,.right-rail,.main-work{gap:18px;display:grid}.left-rail,.right-rail{max-height:calc(100vh - 32px);padding-bottom:2px;position:sticky;top:16px;overflow:auto}.section-heading{grid-template-columns:auto 1fr;align-items:start;gap:12px;margin-bottom:14px;display:grid}.section-heading.compact{margin-bottom:12px}.guide-card span,.section-heading>span{background:var(--teal);color:#fff;border-radius:50%;place-items:center;width:30px;height:30px;font-weight:900;display:grid}.key-panel,.cipher-panel,.guide-panel{gap:14px;display:grid}.key-story{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.key-story div{border-left:4px solid var(--teal);background:#f8faf9;border-radius:8px;padding:11px}.key-story div:nth-child(2n){border-left-color:var(--amber)}.key-story strong,.key-story span{display:block}.key-story strong{color:var(--ink);font-size:.9rem}.key-story span{color:var(--muted);margin-top:5px;line-height:1.42}.key-inputs,.key-results{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.key-inputs button{grid-column:span 2}.compact-field,.field,.inline-key-field{gap:8px;display:grid}.compact-field span,.field span,.inline-key-field span{color:var(--muted);font-size:.84rem;font-weight:760}.compact-field small,.inline-key-field small{color:var(--muted);font-size:.74rem;line-height:1.35}.formula-strip{border:1px solid var(--line);background:#fbfcfc;border-radius:8px;gap:8px;padding:12px;display:grid}.formula-strip span{overflow-wrap:anywhere;color:var(--ink);font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.78rem}.key-status,.hint,.status{min-height:24px;color:var(--amber);margin:0;font-weight:780}.status.ok{color:var(--teal)}.guide-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;display:grid}.guide-card{border:1px solid var(--line);background:#fbfcfc;border-radius:8px;grid-template-columns:auto 1fr;gap:8px 10px;min-height:126px;padding:14px;display:grid}.guide-card strong{color:var(--ink);align-self:center;font-size:.94rem}.guide-card p{color:var(--muted);grid-column:1/-1;margin:0;line-height:1.45}.actions{grid-template-columns:minmax(140px,1.2fr) repeat(3,minmax(100px,.7fr));gap:10px;display:grid}.actions .primary{border-color:var(--teal-dark);background:var(--teal);color:#fff;font-weight:850}.output-field textarea{min-height:116px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.92rem}.delivered-keys,.private-key-request{border:1px solid var(--line);background:var(--panel-soft);border-radius:8px;gap:12px;padding:14px;display:grid}.private-key-request{background:#fffaf2;border-color:#b4530957}.private-key-request p{color:var(--muted);margin:8px 0 0;line-height:1.45}.key-ticket-grid,.private-key-inputs{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.key-ticket-grid>div{border-left:4px solid var(--teal);background:#fff;border-radius:8px;gap:6px;padding:12px;display:grid}.key-ticket-grid>div:nth-child(2){border-left-color:var(--amber)}.key-ticket-grid strong{color:var(--ink)}.key-ticket-grid span{color:var(--teal-dark);font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.88rem}.key-ticket-grid small{color:var(--muted);line-height:1.35}.explain-panel{gap:14px;display:grid}.explain-panel ol{color:var(--muted);gap:8px;margin:0;padding-left:20px;line-height:1.5;display:grid}.mini-flow{grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;display:grid}.mini-flow span{border:1px solid var(--line);min-height:48px;color:var(--ink);text-align:center;overflow-wrap:anywhere;background:#fbfcfc;border-radius:8px;padding:12px 10px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;position:relative}.mini-flow span:not(:last-child):after{z-index:1;background:var(--teal);content:"";width:14px;height:1px;position:absolute;top:50%;right:-9px}.explain-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;display:grid}.explain-grid>div{border:1px solid var(--line);background:var(--panel-soft);border-radius:8px;padding:13px}.explain-grid strong{color:var(--ink)}.binary-list{gap:5px;margin-top:10px;display:grid}.binary-list span{color:var(--muted);background:#fff;border-radius:6px;padding:6px 8px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.76rem}.trace-section{overflow:hidden}.trace-wrap{border-top:1px solid var(--line);overflow-x:auto}.empty-trace{border-top:1px solid var(--line);color:var(--muted);gap:6px;padding:22px 0;display:grid}.empty-trace strong{color:var(--ink)}.metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.metric{border-left:4px solid var(--teal);background:#f8faf9;border-radius:8px;min-height:76px;padding:11px}.metric:nth-child(2n){border-color:var(--amber)}.metric span{color:var(--muted);text-transform:uppercase;font-size:.7rem;font-weight:850;display:block}.metric strong{overflow-wrap:anywhere;color:var(--ink);margin-top:8px;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.78rem;display:block}.prime-current{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:12px;display:grid}.prime-current span{color:var(--teal-dark);text-align:center;background:#effaf7;border-radius:8px;padding:8px;font-weight:800}.prime-list{grid-template-columns:repeat(4,minmax(0,1fr));gap:7px;margin-top:12px;display:grid}.prime-list span{min-height:36px;color:var(--ink);background:#fff;border:1px solid #dbe6e3;border-radius:8px;place-items:center;font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.82rem;display:grid}.alphabet-table{grid-template-columns:repeat(5,minmax(0,1fr));gap:6px;max-height:330px;margin-top:12px;display:grid;overflow:auto}.alphabet-table span{background:#fff;border:1px solid #dbe6e3;border-radius:7px;gap:2px;min-height:48px;padding:7px;display:grid}.alphabet-table strong{color:var(--teal-dark);font-family:SFMono-Regular,Consolas,Liberation Mono,ui-monospace,monospace;font-size:.76rem}.alphabet-table em{color:var(--ink);overflow-wrap:anywhere;font-style:normal;font-weight:760}.champion-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:6px;max-height:260px;margin-top:12px;display:grid;overflow:auto}.champion-grid span{color:var(--teal-dark);background:#edf7f5;border-radius:7px;padding:8px;font-size:.8rem;font-weight:760}.champion-grid span:nth-child(2n){color:var(--amber);background:#fff3e7}.notice{color:var(--wine);background:#8f25470f;border-color:#8f25473d;gap:7px;display:grid}.notice span{color:#6b2637;line-height:1.5}@media (max-width:1120px){.workspace-grid{grid-template-columns:minmax(280px,340px) minmax(0,1fr)}.right-rail{grid-column:1/-1;grid-template-columns:repeat(2,minmax(0,1fr));max-height:none;position:static;overflow:visible}.metrics-card,.notice,.alphabet-guide,.champion-guide{grid-column:span 1}}@media (max-width:980px){.workspace-grid{grid-template-columns:1fr}.left-rail{max-height:none;position:static;overflow:visible}.right-rail{grid-template-columns:1fr}.guide-grid,.explain-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:680px){.app-shell{width:min(100% - 20px,1680px);padding:18px 0 30px}.hero-panel,.panel,.side-card,.explain-panel{padding:16px}.titlebar{grid-template-columns:1fr}.rsa-badge{display:none}.mode-cards,.guide-grid,.key-story,.key-inputs,.key-results,.key-ticket-grid,.private-key-inputs,.actions,.metrics,.prime-current,.prime-list,.alphabet-table,.champion-grid,.explain-grid,.mini-flow{grid-template-columns:1fr}.key-inputs button,.actions .primary{grid-column:auto}.mini-flow span:not(:last-child):after{display:none}}