:root{--bg:#0e1116;--panel:#161b22;--panel2:#1c2230;--ink:#e6edf3;--dim:#9aa7b4;--line:#2a3038;
--accent:#7cc4ff;--accent2:#4b9fe1;--ok:#5ec98b;--warn:#e5b567;--bad:#e57373;--radius:10px}
[data-theme=light]{--bg:#f7f8fa;--panel:#fff;--panel2:#f0f3f7;--ink:#131820;--dim:#5a6673;--line:#dde3ea;
--accent:#1668b8;--accent2:#0f4f8f;--ok:#1f8a4c;--warn:#8a6210;--bad:#b23b3b}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);
font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent)}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;
padding:10px 18px;border-bottom:1px solid var(--line);background:var(--panel);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-size:14px}
.backlink{text-decoration:none}
.sep{color:var(--dim)}
.topactions{display:flex;align-items:center;gap:8px}
.credits{font-size:13px;color:var(--dim)}
.topup{font-size:13px}
button{font:inherit;cursor:pointer;border-radius:8px;border:1px solid var(--line);
background:var(--panel2);color:var(--ink);padding:7px 13px}
button:hover{border-color:var(--accent2)}
button:disabled{opacity:.5;cursor:not-allowed}
.primary{background:var(--accent);border-color:var(--accent);color:#06121f;font-weight:600}
[data-theme=light] .primary{color:#fff}
.ghost{background:transparent}
main{max-width:820px;margin:0 auto;padding:22px 18px 60px}
h1{font-size:24px;margin:6px 0 12px;letter-spacing:-.01em}
h2{font-size:16px;margin:0}
.ask textarea{width:100%;min-height:84px;resize:vertical;padding:12px 13px;border-radius:var(--radius);
border:1px solid var(--line);background:var(--panel);color:var(--ink);font:inherit}
.ask textarea:focus{outline:2px solid var(--accent2);outline-offset:1px}
.askrow{display:flex;align-items:center;gap:10px;margin-top:10px;flex-wrap:wrap}
.hint{color:var(--dim);font-size:13px}
.preflight{font-size:13px;margin:10px 0 0;padding:8px 11px;border-radius:8px;
border:1px solid var(--line);background:var(--panel2)}
.zone{margin-top:26px;border:1px solid var(--line);border-radius:var(--radius);
background:var(--panel);padding:15px 16px}
.zonehead{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
.meta{color:var(--dim);font-size:12.5px}
.reading{margin:0 0 10px;font-size:15px}
.feas{margin:0 0 12px;padding:9px 12px;border-radius:8px;font-size:13.5px;
border:1px solid var(--line);background:var(--panel2)}
.feas.bad{border-color:var(--bad)}
.steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.step{border:1px solid var(--line);border-radius:9px;padding:10px 12px;background:var(--panel2)}
.step.off{opacity:.45}
.stephead{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.stagechip{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--dim);
border:1px solid var(--line);border-radius:999px;padding:1px 8px}
.stepname{font-weight:600}
.stepwhy{color:var(--dim);font-size:13.5px;margin:5px 0 0}
.stepskill{font-size:12px;color:var(--dim);margin-top:4px}
.stepacts{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.stepacts button{padding:4px 9px;font-size:12.5px}
.side{margin-top:12px;font-size:13.5px}
.side h3{font-size:13px;margin:0 0 5px;color:var(--dim);text-transform:uppercase;letter-spacing:.05em}
.side ul{margin:0;padding-left:18px}
.confirmrow{display:flex;align-items:center;gap:10px;margin-top:14px;flex-wrap:wrap}
.stages{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;font-size:13.5px}
.stages li{color:var(--dim)}
.stages li.done{color:var(--ok)}
.stages li.active{color:var(--ink);font-weight:600}
.headline{font-size:17px;margin:0 0 10px;font-weight:600}
.recovery{font-size:13px;color:var(--warn);margin:0 0 10px}
.rstep{border-top:1px solid var(--line);padding:12px 0}
.rstep h3{font-size:15px;margin:0 0 3px}
.rstep .what{color:var(--dim);font-size:13.5px;margin:0 0 8px}
.rstep .body{white-space:pre-wrap;font-size:14px}
.exports{display:flex;gap:8px;margin-top:14px;flex-wrap:wrap}
.calcgrid{display:grid;grid-template-columns:1fr 130px;gap:8px 12px;align-items:center;font-size:13.5px}
.calcgrid input,.calcgrid select{padding:6px 8px;border-radius:7px;border:1px solid var(--line);
background:var(--panel2);color:var(--ink);font:inherit;width:100%}
.calcout{margin:12px 0 0;padding:10px 12px;border-radius:8px;background:var(--panel2);
border:1px solid var(--line);font-size:13.5px}
.calcout.bad{border-color:var(--bad)}
.history{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:7px}
.history li{display:flex;justify-content:space-between;gap:10px;align-items:center;
border:1px solid var(--line);border-radius:8px;padding:8px 11px;font-size:13.5px}
footer{border-top:1px solid var(--line);padding:18px;color:var(--dim);font-size:12.5px;
max-width:820px;margin:0 auto}
footer p{margin:0 0 6px}
.hidden{display:none}
@media(max-width:560px){.calcgrid{grid-template-columns:1fr}main{padding:16px 13px 50px}h1{font-size:21px}}
.snip{background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:11px 13px;
overflow-x:auto;font-size:12.5px;line-height:1.5;margin:0 0 10px}
.snip code{white-space:pre;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
table.errs{border-collapse:collapse;width:100%;font-size:13px;margin-top:8px}
table.errs th,table.errs td{border:1px solid var(--line);padding:6px 9px;text-align:left;vertical-align:top}
table.errs th{background:var(--panel2)}
ul.side{margin:0;padding-left:18px;font-size:13.5px}
#lang{padding:6px 8px;border-radius:7px;border:1px solid var(--line);background:var(--panel2);
color:var(--ink);font:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.93em}