:root{color-scheme:dark;--bg:#0b1017;--panel:#131b25;--inset:#0d141e;--line:#2a3747;--text:#f4f2eb;--muted:#b3bdc9;--gold:#f1c474;--green:#78dda6;--mono:ui-monospace,'Cascadia Mono',Consolas,monospace}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 85% 12%,#1a2431 0,transparent 44%),var(--bg);color:var(--text);font:16px/1.55 system-ui,sans-serif}a{color:var(--gold);text-decoration:none}a:hover{text-decoration:underline}button,select,input,textarea{font:inherit}button,select,input,textarea{color:inherit}button,select{cursor:pointer}button:disabled{cursor:default;opacity:.46}button,select,textarea,.speed{border:1px solid var(--line);background:var(--inset);border-radius:8px}button{padding:9px 14px;font-weight:650}button:hover:not(:disabled){border-color:var(--gold)}:focus-visible{outline:2px solid var(--gold);outline-offset:3px}button[hidden],div[hidden],p[hidden]{display:none!important}.wrap{max-width:1140px;margin:auto;padding-inline:24px}.skip{position:absolute;top:-5rem}.skip:focus{top:8px;left:8px;z-index:2;background:var(--inset);padding:8px}.bar{background:#0b1017de;border-bottom:1px solid var(--line)}.head,.brand,.footer{display:flex;align-items:center;justify-content:space-between}.head{min-height:76px}.brand{color:var(--text);justify-content:flex-start;gap:12px;font-size:15px;font-weight:800;letter-spacing:.08em}.brand img{object-fit:contain}.brand small{display:block;font:10px var(--mono);color:var(--muted);letter-spacing:.14em;margin-top:3px}.back{font-size:13px}.hero{position:relative;display:flex;align-items:center;justify-content:space-between;gap:30px;padding:40px 0 30px}.eyebrow{margin:0 0 7px;font:700 12px/1.4 var(--mono);letter-spacing:.13em;color:var(--gold)}.led{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--green);margin-right:5px;box-shadow:0 0 10px #78dda655}h1,h2,p{margin-top:0}h1{font-size:clamp(42px,7vw,76px);line-height:1.04;letter-spacing:-.065em;margin-bottom:12px}h1 em{font-style:normal;color:var(--gold)}.intro{max-width:520px;color:var(--muted);margin-bottom:16px}.hero-meta{display:flex;gap:8px;flex-wrap:wrap}.hero-meta span{font:700 11px var(--mono);letter-spacing:.04em;border:1px solid var(--line);border-radius:4px;padding:6px 8px;color:var(--muted)}.hero-wave{width:36%;max-width:360px;opacity:.85}.tabs{display:flex;gap:8px;margin-bottom:12px}.tabs button{flex:1;text-align:left;color:var(--muted);min-height:49px;padding:8px 14px}.tabs button b{font:700 12px var(--mono);color:var(--gold);margin-right:6px}.tabs [aria-selected=true]{background:#30271e;color:var(--text);border-color:#9e7840;box-shadow:inset 0 -2px var(--gold)}.station{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:14px;align-items:start}.panel{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:23px;min-width:0}h2{font-size:26px;letter-spacing:-.035em;line-height:1.18;margin-bottom:7px}.sub,.setting p,.reference p,.drill-hint{color:var(--muted);font-size:14px}.mode-options,.koch-option{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.mode-options{margin:16px 0}.mode-options label,.copy-head label,.setting label{font-size:14px;font-weight:700}.mode-options select,.setting select{padding:6px 9px;max-width:100%}.drill-hint{width:100%;margin:0}.monitor{background:var(--inset);padding:11px 13px;border-radius:8px;border:1px solid var(--line)}.monitor-head,.copy-head,.form-actions,.setting label,.scale{display:flex;justify-content:space-between;gap:8px;align-items:center}.monitor-head{font:700 11px var(--mono);letter-spacing:.07em;color:var(--green)}.monitor .led{background:#667587;box-shadow:none}.monitor .led.on{background:var(--green);box-shadow:0 0 10px #78dda688}progress{display:block;width:100%;height:5px;margin-top:9px;accent-color:var(--green)}.actions{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 19px}.primary{background:var(--gold);color:#20180a;border-color:var(--gold)}.primary:hover:not(:disabled){background:#ffda96}.copy-head{margin-bottom:6px}.copy-head output,.scale{color:var(--muted);font:11px var(--mono)}textarea{width:100%;padding:10px 12px;font-family:var(--mono);resize:vertical;min-height:94px}textarea::placeholder{color:#9eabb9}.form-actions{justify-content:flex-start;flex-wrap:wrap;margin-top:6px}.form-actions button:first-child{color:var(--green)}.result{margin-top:14px;background:var(--inset);border:1px solid var(--line);padding:12px;border-radius:8px;overflow-wrap:anywhere}.result p{margin:0 0 8px}.result p:last-child{margin-bottom:0}.result code{font:14px/1.8 var(--mono);color:var(--gold);white-space:pre-wrap}.result mark{color:#160d08;background:#ffb5a5;border-radius:3px}.result .score{font-weight:750;color:var(--green)}.config h2{font-size:22px}.setting{margin-top:13px;border-top:1px solid var(--line);padding-top:12px}.setting p{margin:6px 0 0;font-size:12px}.setting output{font:700 12px var(--mono);color:var(--gold)}.speed{display:flex;align-items:center;gap:6px;margin:7px 0 2px}.speed button{padding:4px 10px;border-color:transparent;border-radius:6px}.speed input{min-width:0;flex:1;width:3rem;text-align:right;border:0;background:transparent;font:700 20px var(--mono);appearance:textfield}.speed input::-webkit-inner-spin-button,.speed input::-webkit-outer-spin-button{appearance:none}.speed span{font:11px var(--mono);color:var(--muted)}input[type=range]{width:100%;margin:9px 0 4px;accent-color:var(--gold)}.setting select{width:100%;margin-top:6px}.test{width:100%;margin-top:13px}.reference{margin-top:13px;padding:13px 18px;border:1px solid var(--line);border-radius:9px;background:#111923}.reference summary{cursor:pointer;font-weight:700}.reference p{margin:9px 0}.alphabet{display:grid;grid-template-columns:repeat(auto-fit,minmax(77px,1fr));gap:6px}.alphabet button{font:700 14px var(--mono);padding:8px 4px}.alphabet span{display:block;color:var(--gold)}.footer{padding-block:19px 24px;color:var(--muted);font:12px var(--mono);gap:10px}.footer strong{color:var(--gold)}@media(max-width:760px){.station{grid-template-columns:minmax(0,1fr) 230px}.panel{padding:16px}.wrap{padding-inline:16px}.hero-wave{width:27%}}@media(max-width:620px){.station{grid-template-columns:1fr}.hero{padding-block:28px 23px}.hero-wave{display:none}.tabs{gap:4px}.tabs button{font-size:12px;padding:7px 5px;text-align:center}.tabs button b{display:block;margin:0 auto 2px;font-size:10px}.head{min-height:62px}.brand{font-size:12px;gap:6px}.brand small{font-size:8px}.brand img{width:38px;height:38px}.back{font-size:11px}.actions button,.form-actions button{font-size:14px;padding:8px 10px}.footer{font-size:10px}}@media(prefers-reduced-motion:no-preference){button,a{transition:background-color .12s,border-color .12s}}
