*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0}:root{--bg: #0a0c0f;--surface: #111418;--surface2: #181c22;--border: #252b35;--border-glow: #2d5eff;--accent: #2d5eff;--accent2: #ff3d6b;--text: #e8eaf0;--text-dim: #6b7280;--text-dimmer: #3d4450;--mono: "JetBrains Mono", monospace;--display: "Syne", sans-serif;--radius: 6px;--transition: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:var(--mono);min-height:100vh;-webkit-font-smoothing:antialiased}#root{min-height:100vh}.bg-grid{position:fixed;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(45,94,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(45,94,255,.04) 1px,transparent 1px);background-size:48px 48px;pointer-events:none;z-index:0}.app{position:relative;z-index:1;max-width:1100px;margin:0 auto;padding:48px 24px 64px;display:flex;flex-direction:column;gap:32px}.header{text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px}.header-tag{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.3em;color:var(--accent);border:1px solid var(--accent);padding:4px 16px;border-radius:2px;text-transform:uppercase}.title{font-family:var(--display);font-size:clamp(56px,10vw,96px);font-weight:800;letter-spacing:-.02em;line-height:1;color:var(--text)}.title-accent{color:var(--accent);position:relative}.title-accent:after{content:"";position:absolute;bottom:4px;left:0;right:0;height:4px;background:var(--accent2);border-radius:2px}.subtitle{font-size:14px;color:var(--text-dim);letter-spacing:.08em}.panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;display:flex;flex-direction:column;gap:28px}.selector-row{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}.selector-group{display:flex;gap:8px}.selector-btn{font-family:var(--display);font-size:16px;font-weight:700;letter-spacing:.04em;padding:12px 28px;border:2px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-dim);cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:10px}.btn-icon{font-size:18px;opacity:.6}.selector-btn:hover{border-color:var(--accent);color:var(--text)}.selector-btn.active{border-color:var(--accent);background:#2d5eff1f;color:var(--text)}.direction-toggle{display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.dir-btn{font-family:var(--mono);font-size:13px;font-weight:600;padding:10px 20px;border:none;background:transparent;color:var(--text-dim);cursor:pointer;transition:all var(--transition);letter-spacing:.02em}.dir-btn:hover{color:var(--text)}.dir-btn.active{background:var(--accent2);color:#fff}.algo-info{background:var(--surface2);border-left:3px solid var(--accent);padding:14px 18px;border-radius:0 var(--radius) var(--radius) 0;font-size:13px;color:var(--text-dim);line-height:1.6}.algo-info strong{color:var(--text);font-weight:600}.algo-info em{color:var(--accent);font-style:normal}.params-row{display:flex;align-items:center;gap:16px}.param-label{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--text-dim);letter-spacing:.05em;text-transform:uppercase;font-weight:600}.shift-control{display:flex;align-items:center;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.shift-btn{width:38px;height:42px;border:none;background:var(--surface2);color:var(--text);font-size:18px;cursor:pointer;transition:background var(--transition);font-family:var(--mono)}.shift-btn:hover{background:var(--border)}.shift-input{width:72px;height:42px;border:none;border-left:1px solid var(--border);border-right:1px solid var(--border);background:var(--surface);color:var(--text);font-family:var(--mono);font-size:18px;font-weight:600;text-align:center;outline:none}.shift-input::-webkit-inner-spin-button,.shift-input::-webkit-outer-spin-button{opacity:0}.key-input{font-family:var(--mono);font-size:16px;font-weight:600;padding:10px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface2);color:var(--accent2);outline:none;width:240px;letter-spacing:.2em;text-transform:uppercase;transition:border-color var(--transition)}.key-input:focus{border-color:var(--accent2)}.key-input::placeholder{color:var(--text-dimmer);letter-spacing:.05em;text-transform:none}.io-columns{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:stretch}.io-box{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color var(--transition)}.io-box:focus-within{border-color:var(--accent)}.io-box.output{border-color:var(--border)}.io-header{display:flex;justify-content:space-between;align-items:center;padding:10px 16px;background:var(--surface2);border-bottom:1px solid var(--border)}.io-label{font-size:11px;font-weight:700;letter-spacing:.2em;color:var(--text-dim)}.clear-btn,.copy-btn{font-family:var(--mono);font-size:12px;font-weight:600;padding:4px 12px;border:1px solid var(--border);border-radius:4px;background:transparent;color:var(--text-dim);cursor:pointer;transition:all var(--transition)}.clear-btn:hover:not(:disabled){border-color:var(--accent2);color:var(--accent2)}.copy-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.clear-btn:disabled,.copy-btn:disabled{opacity:.3;cursor:default}.io-textarea{flex:1;min-height:180px;padding:16px;background:var(--surface);border:none;color:var(--text);font-family:var(--mono);font-size:14px;line-height:1.7;resize:none;outline:none}.io-textarea::placeholder{color:var(--text-dimmer)}.io-result{flex:1;min-height:180px;padding:16px;background:#2d5eff0a;font-family:var(--mono);font-size:14px;line-height:1.7;color:var(--accent);word-break:break-all;white-space:pre-wrap}.placeholder{color:var(--text-dimmer);font-style:italic}.io-footer{padding:8px 16px;background:var(--surface2);border-top:1px solid var(--border)}.char-count{font-size:11px;color:var(--text-dimmer)}.arrow-col{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:0 20px}.arrow-label{font-size:9px;font-weight:700;letter-spacing:.2em;color:var(--text-dimmer);writing-mode:horizontal-tb}.arrow{font-size:28px;color:var(--accent);line-height:1}.cipher-badge{font-family:var(--mono);font-size:12px;font-weight:600;padding:4px 10px;background:#2d5eff26;border:1px solid var(--accent);border-radius:4px;color:var(--accent);max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:center}.alphabet-vis{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.alph-row{display:flex;overflow-x:auto;padding:16px;gap:4px;background:var(--surface2);scrollbar-width:thin;scrollbar-color:var(--border) transparent}.alph-cell{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:30px}.alph-orig{font-size:11px;font-weight:600;color:var(--text-dim)}.alph-shifted{font-size:13px;font-weight:700;color:var(--accent);background:#2d5eff1f;width:26px;height:26px;display:flex;align-items:center;justify-content:center;border-radius:4px}.alph-legend{display:flex;gap:20px;padding:10px 16px;background:var(--surface);border-top:1px solid var(--border)}.leg-orig{font-size:12px;color:var(--text-dim)}.leg-shifted{font-size:12px;color:var(--accent)}.key-vis{border:1px solid rgba(255,61,107,.3);border-radius:var(--radius);overflow:hidden}.key-vis-label{font-size:11px;font-weight:700;letter-spacing:.2em;color:var(--text-dim);padding:10px 16px;background:var(--surface2);border-bottom:1px solid rgba(255,61,107,.2);text-transform:uppercase}.key-chars{display:flex;gap:8px;padding:16px;background:var(--surface2);overflow-x:auto;flex-wrap:wrap}.key-char-cell{display:flex;flex-direction:column;align-items:center;gap:4px}.kc-letter{font-size:18px;font-weight:700;color:var(--accent2);width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:#ff3d6b1a;border:1px solid rgba(255,61,107,.3);border-radius:6px}.kc-shift{font-size:10px;color:var(--text-dimmer)}.footer{text-align:center;font-size:12px;color:var(--text-dimmer);letter-spacing:.05em;padding:16px}@media (max-width: 768px){.io-columns{grid-template-columns:1fr}.arrow-col{flex-direction:row;padding:8px 0}.arrow{transform:rotate(90deg)}.selector-row{flex-direction:column;align-items:flex-start}.panel{padding:20px 16px}}
