@import url('./fonts/fonts.css');
:root{--paper:#f7f5ef;--ink:#292b29;--muted:#73756f;--line:#dedfd6;--purple:#6c4bc3;--purple-light:#eee8fc;--green:#426450;--green-light:#e8eee3;--orange:#bd662d;--orange-light:#fae7d7;--mono:'DM Mono',monospace;--sans:'DM Sans',sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px}button,input,textarea{font:inherit}button,a,input,textarea,[tabindex]{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--purple);outline-offset:4px}button{transition:background .15s,transform .15s}button:active:not(:disabled){transform:translateY(1px)}.masthead,main,footer{max-width:1220px;margin:auto}.masthead{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px;color:var(--ink);font-size:12px;font-weight:700;letter-spacing:1.7px;text-decoration:none}.brand-icon{width:37px;height:37px;background:var(--purple);border-radius:9px;color:white;display:flex;align-items:center;justify-content:center;font-family:Georgia,serif;font-size:28px;position:relative}.brand-icon span{font-family:var(--sans);font-size:15px;position:absolute;right:3px;top:0}.edition{font:11px var(--mono);letter-spacing:1px;color:var(--muted)}.edition span{margin:0 12px;color:#b6b7ad}.intro{padding:59px 0 48px;display:flex;justify-content:space-between;gap:35px;align-items:center}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.9px;color:var(--purple);margin:0 0 19px}h1{font-family:'Libre Caslon Display',Georgia,serif;font-weight:400;font-size:66px;line-height:1.05;letter-spacing:-2px;margin:0 0 20px}h1 em{font-weight:400;color:var(--purple)}.lede{max-width:570px;font-size:15px;line-height:1.8;color:var(--muted);margin:0}.intro-art{min-width:230px;display:flex;position:relative;align-items:center;justify-content:center;padding-bottom:24px;transform:rotate(-6deg);gap:8px}.intro-art>span{background:var(--green-light);border:1px solid #ced7c9;border-radius:10px;font:40px var(--mono);padding:12px 18px;box-shadow:0 5px 0 #dde2d7}.intro-art .art-key{font-size:18px;background:var(--orange-light);color:var(--orange);padding:10px;border-color:#e3c7b2;box-shadow:0 4px 0 #ebd8c7;position:absolute;left:60px;top:-30px;transform:rotate(12deg)}.intro-art .art-arrow{background:none;border:none;box-shadow:none;padding:0 8px;font-size:28px;color:var(--muted)}.intro-art .art-result{color:var(--purple);background:var(--purple-light);border-color:#d3c7ed;box-shadow:0 5px 0 #ded5ed;transform:rotate(12deg)}.intro-art small{position:absolute;bottom:-7px;font:9px var(--mono);letter-spacing:1px;color:var(--muted);transform:rotate(6deg)}section.workspace,section.explorer{margin-bottom:35px;border:1px solid var(--line);border-radius:14px;background:#fffefa;overflow:hidden}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 26px;border-bottom:1px solid var(--line)}h2{font-size:16px;margin:0;font-weight:600;display:flex;align-items:center;gap:13px}.number{font:11px var(--mono);color:var(--muted);border:1px solid var(--line);border-radius:50%;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center}.mode-switch{background:#eeeee7;padding:4px;border-radius:7px;display:flex}.mode-switch button{border:0;background:transparent;color:var(--muted);padding:7px 18px;font-size:12px;font-weight:600;border-radius:4px}.mode-switch .selected{background:white;color:var(--ink);box-shadow:0 1px 4px #00000012}.editor-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:26px}.label-line{display:flex;justify-content:space-between;align-items:center;min-height:26px;gap:10px}label,.label-line>span{font-size:10px;letter-spacing:1.3px;font-weight:700}.text-button{border:0;background:transparent;color:var(--purple);font-size:11px;padding:4px 0}.inputs textarea{width:100%;height:84px;resize:vertical;border:1px solid var(--line);border-radius:7px;padding:15px;font:19px/1.6 var(--mono);color:var(--ink);background:#fff;margin-top:7px}.inputs textarea:focus,.inputs input:focus{outline:2px solid #bba8e7;outline-offset:1px}.help{font-size:11px;line-height:1.6;color:var(--muted);margin:8px 0 20px}.key-line{display:flex;align-items:center;gap:20px}.key-line>div{flex:1}.key-line label{display:block;margin-bottom:8px}.key-line input{width:100%;padding:11px 14px;border:1px solid #e1d4c7;background:#fffaf4;border-radius:7px;font:17px var(--mono);color:var(--orange);text-transform:uppercase}.key-icon{font-size:47px;color:#b79777;padding-top:13px}.inputs .help:last-of-type{margin-bottom:0}.result-panel{background:var(--purple-light);border:1px solid #ddd3f0;border-radius:9px;padding:18px 23px;display:flex;flex-direction:column;min-width:0}.result-panel .label-line{color:var(--purple)}.copy-button{font-size:11px;color:var(--purple);border:1px solid #cabbe7;background:#ffffff55;border-radius:5px;padding:7px 10px}#result{display:block;white-space:pre-wrap;overflow-wrap:anywhere;font:27px/1.65 var(--mono);color:var(--purple);margin:27px 0;max-height:220px;overflow:auto;min-height:80px}.result-bottom{display:flex;align-items:center;gap:7px;margin-top:auto;padding-top:15px;border-top:1px solid #daceed;font-size:10px;color:#75648f}.status-dot{width:5px;height:5px;background:var(--purple);border-radius:50%}#letter-count{margin-left:auto;white-space:nowrap}.error{color:#a22d25;font-size:12px}.section-hint{font-size:11px;color:var(--muted)}.alignment-wrap{padding:24px 26px 10px;display:flex;gap:14px}.row-labels{display:flex;flex-direction:column;flex-shrink:0;gap:6px;width:100px;padding-top:0}.row-labels span{height:37px;display:flex;align-items:center;font:9px var(--mono);letter-spacing:.5px;color:var(--muted)}.alignment{display:flex;gap:5px;overflow:auto;padding:0 3px 10px;flex:1;min-width:0;scrollbar-width:thin}.letter-column{padding:0;border:1px solid transparent;background:none;border-radius:5px;display:flex;flex-direction:column;gap:5px;min-width:36px;flex-shrink:0}.letter-column span{width:34px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:4px;font:15px var(--mono)}.letter-column .plain{background:var(--green-light);color:var(--green)}.letter-column .key{background:var(--orange-light);color:var(--orange)}.letter-column .cipher{background:var(--purple-light);color:var(--purple)}.letter-column.active{outline:2px solid var(--purple);outline-offset:1px}.letter-column.active .cipher{background:var(--purple);color:#fff}.letter-column.punctuation{min-width:20px}.punctuation span{width:20px;color:#a1a397}.step-toolbar{display:flex;justify-content:space-between;align-items:center;padding:0 26px 18px;gap:15px;border-bottom:1px solid var(--line)}#step-count{font:11px var(--mono);color:var(--muted)}.step-controls{display:flex;gap:6px}.step-controls button{border:1px solid var(--line);border-radius:5px;background:#fffefa;padding:7px 12px;font-size:12px}#play{min-width:115px}.detail-grid{display:grid;grid-template-columns:.8fr 1.2fr}.explanation{padding:32px 28px;border-right:1px solid var(--line)}.explanation .eyebrow{color:var(--muted);font-size:9px}.letter-equation{display:flex;gap:14px;align-items:center;margin:28px 0 30px}.letter-equation>div{text-align:center;flex:1}.big-letter{height:75px;display:flex;align-items:center;justify-content:center;border-radius:8px;font:39px var(--mono)}.input-color{background:var(--green-light);color:var(--green)}.key-color{background:var(--orange-light);color:var(--orange)}.output-color{background:var(--purple-light);color:var(--purple)}.letter-equation small{display:block;margin-top:9px;font:9px var(--mono);color:var(--muted)}.letter-equation>span{color:#92958b;padding-bottom:19px;font-size:20px}.explanation h3{font-size:23px;font-weight:500;letter-spacing:-.5px;margin:0 0 12px}.explanation-copy{color:var(--muted);font-size:13px;line-height:1.85;min-height:70px}.math-box{padding:17px;background:#f2f2eb;border:1px solid #e5e5dc;border-radius:6px;margin:22px 0}.math-box code{display:block;font:14px var(--mono);line-height:1.6}.math-box>span{display:block;font-size:10px;color:var(--muted);margin-top:8px}.table-instruction{font-size:12px;line-height:1.8;color:var(--muted)}.table-panel{padding:25px;min-width:0}.table-heading{display:flex;justify-content:space-between;align-items:center;gap:12px}.table-heading h3{font-size:14px;font-weight:500;margin:0}.table-heading>span{font:9px var(--mono);color:var(--muted)}.table-axis{text-align:center;font:9px var(--mono);letter-spacing:1px;color:var(--green);padding:20px 0 8px}.table-scroll{overflow:auto;scrollbar-width:thin}#square{border-collapse:separate;border-spacing:1px;width:100%;min-width:470px;table-layout:fixed;font:9px var(--mono);text-align:center}#square td,#square th{padding:0;height:17px;font-weight:400;border-radius:2px}#square th{color:var(--green);background:var(--green-light)}#square th:first-child{color:var(--orange);background:var(--orange-light)}#square td{color:#979a91;background:#f7f7f1}#square td.column-highlight{background:#e0e9da;color:var(--green)}#square td.row-highlight{background:#f6dfcc;color:#a15b28}#square th.column-highlight{background:var(--green);color:#fff}#square th.row-highlight{background:var(--orange);color:#fff}#square td.intersection{background:var(--purple);color:#fff;font-weight:500;outline:2px solid var(--purple);position:relative;z-index:1}.legend{display:flex;gap:14px;justify-content:center;margin-top:17px;font-size:9px;color:var(--muted)}.legend span{display:flex;align-items:center;gap:5px}.legend i{display:inline-block;width:7px;height:7px;border-radius:2px}.input-dot{background:var(--green)}.key-dot{background:var(--orange)}.output-dot{background:var(--purple)}.how-it-works{margin:45px 0 50px}.how-it-works .section-heading{padding:0 0 20px}.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;padding-top:27px}.note-number{font:9px var(--mono);color:var(--purple);letter-spacing:1px}.notes h3{font-size:16px;font-weight:500;margin:14px 0 10px}.notes p{font-size:12px;line-height:1.9;color:var(--muted)}.notes code{display:block;font:12px/1.8 var(--mono);color:var(--green);padding-top:6px}.notes .historical-note{font-size:11px;border-left:2px solid #c9b7e5;padding-left:12px}footer{display:flex;justify-content:space-between;gap:25px;align-items:center;border-top:1px solid var(--line);padding:24px 0 35px;color:var(--muted);font-size:10px}.brand-small{font-size:9px;font-weight:700;letter-spacing:1.4px;color:var(--ink)}footer a{color:var(--muted);text-decoration:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(min-width:1450px){.masthead,main,footer{max-width:1220px}}@media(max-width:1300px){.masthead,main,footer{margin-left:40px;margin-right:40px}}@media(max-width:1000px){h1{font-size:54px}.intro-art{min-width:190px;transform:scale(.85) rotate(-6deg)}.detail-grid{grid-template-columns:1fr 1.25fr}.explanation{padding:25px 20px}.table-panel{padding:25px 18px}.big-letter{height:65px}.letter-equation{gap:8px}.legend{gap:8px}.section-hint{font-size:10px}}@media(max-width:760px){.masthead,main,footer{margin-left:20px;margin-right:20px}.masthead{height:75px}.intro{padding:40px 0 30px}.intro-art{display:none}h1{font-size:49px;max-width:420px}.lede{font-size:14px}.editor-grid{grid-template-columns:1fr;gap:22px;padding:20px}.section-heading{padding:17px 20px}h2{font-size:14px;gap:8px}.section-hint{display:none}.mode-switch button{padding:6px 10px;font-size:11px}.detail-grid{grid-template-columns:1fr}.explanation{border-right:0;border-bottom:1px solid var(--line);padding:25px}.letter-equation{max-width:340px;margin:20px 0}.explanation-copy{min-height:0}.table-panel{padding:25px 20px}.table-scroll{padding:2px}.alignment-wrap{padding:20px 18px 10px;gap:7px}.row-labels{width:80px}.row-labels span{font-size:8px}.step-toolbar{padding:0 20px 18px}.notes{grid-template-columns:1fr;gap:24px}.notes article{border-bottom:1px solid var(--line);padding-bottom:22px}.notes article:last-child{border:0;padding-bottom:0}.notes h3{margin-top:10px}.notes p{font-size:13px;margin-bottom:8px}.how-it-works{margin-top:35px;margin-bottom:30px}footer{flex-wrap:wrap;justify-content:flex-start;gap:15px}footer>span:nth-child(2){width:100%;order:3}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}