:root{--bg:#0a1428;--panel:#111e3a;--line:#1f3157;--text:#e6edf8;--muted:#8fa3c4;--blue:#3b82f6;--cyan:#22d3ee;--shadow:0 6px 20px rgba(0,0,0,.35)}
:root[data-theme=light]{--bg:#f1f5fb;--panel:#fff;--line:#d6deec;--text:#0f1b33;--muted:#53627f;--blue:#1d4ed8;--cyan:#0e7490;--shadow:0 4px 14px rgba(15,27,51,.1)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif;display:flex;min-height:100vh}
a{color:var(--cyan)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.sidebar{width:240px;flex:none;background:var(--panel);border-right:1px solid var(--line);padding:24px 16px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:20px}
.brand{font-size:1.4rem;font-weight:700;color:var(--cyan)}
nav{display:flex;flex-direction:column;gap:4px;flex:1}
nav a{padding:10px 12px;border-radius:10px;color:var(--text);text-decoration:none;transition:background .2s}
nav a:hover{background:var(--line)}
nav a.active{background:var(--blue);color:#fff}
main{flex:1;padding:32px;max-width:1100px;min-width:0}
h1{margin:0 0 4px;font-size:2rem}h2{margin:0 0 12px;font-size:1.15rem}
.muted{color:var(--muted)}.small{font-size:.85rem}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:16px 0}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:16px;margin:16px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px}
section>.card{margin:16px 0}.grid2>.card,.grid3>.card{margin:0}
.wide{grid-column:1/-1}
.big{font-size:2.2rem;color:var(--cyan)}
.bar{height:14px;background:var(--line);border-radius:99px;overflow:hidden}
#barFill{height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .5s}
.btn{background:var(--blue);color:#fff;border:0;border-radius:10px;padding:10px 16px;font:inherit;cursor:pointer;transition:filter .2s;align-self:flex-start}
.btn:hover{filter:brightness(1.15)}.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn.done{background:#15803d}
label{display:flex;flex-direction:column;gap:4px;font-size:.9rem;color:var(--muted)}
label.chk{flex-direction:row;align-items:center;gap:8px}
input,textarea{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:10px;font:inherit}
textarea{resize:vertical;font-family:ui-monospace,Consolas,monospace}
.out{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:10px;margin:0;font-family:ui-monospace,Consolas,monospace;word-break:break-all;white-space:pre-wrap;min-height:2.6em}
.err{color:#f87171;margin:0;min-height:1.2em}
.ok{color:#4ade80}.bad{color:#f87171}
.badge{align-self:flex-start;font-size:.75rem;padding:2px 10px;border-radius:99px;border:1px solid var(--cyan);color:var(--cyan)}
.plain{list-style:none;margin:0;padding:0}.plain li{padding:4px 0;border-bottom:1px solid var(--line)}
.steps li{margin-bottom:10px}
code{background:var(--bg);padding:2px 6px;border-radius:6px;font-size:.9em}
details{border-top:1px solid var(--line);padding:8px 0}summary{cursor:pointer;font-weight:600}
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.flow span{background:var(--bg);border:1px solid var(--cyan);border-radius:12px;padding:12px 16px}
.flow i{font-style:normal;color:var(--cyan);font-size:1.4rem}
.menu-btn{display:none}
@media(max-width:800px){
 body{flex-direction:column}
 .menu-btn{display:block;position:sticky;top:0;z-index:20;background:var(--panel);color:var(--text);border:0;border-bottom:1px solid var(--line);padding:14px;font:inherit;text-align:left}
 .sidebar{display:none;width:100%;height:auto;position:static}
 .sidebar.open{display:flex}
 main{padding:20px 16px}
 .grid2{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}