:root{--ink:#172233;--muted:#657184;--line:#d8e1ec;--blue:#2457d6;--dark:#173b9e;--green:#13845a;--red:#bd394a;--gold:#d18b00;--purple:#7556d8}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 8% 0,#dfe9ff,transparent 28rem),radial-gradient(circle at 95% 20%,#fff0bf,transparent 25rem),#f4f7fb;color:var(--ink);font-family:Inter,system-ui,-apple-system,"Segoe UI",sans-serif}button,input,textarea{font:inherit}.hf{width:min(1180px,calc(100% - 28px));margin:auto;padding:28px 0 55px}
.hf-hero{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.hf-kicker{margin:0 0 7px;color:var(--blue);font-size:.75rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.hf-hero h1{margin:0;font-size:clamp(2.2rem,5vw,3.8rem);letter-spacing:-.055em;line-height:1}.hf-hero p{max-width:690px;margin:12px 0 0;color:var(--muted);line-height:1.55}.hf-score{min-width:155px;padding:14px 18px;border:1px solid var(--line);border-radius:16px;background:#ffffffdb;box-shadow:0 12px 35px #17223312;text-align:center}.hf-score strong,.hf-score span{display:block}.hf-score strong{font-size:1.3rem}.hf-score span{color:var(--muted);font-size:.8rem}
.hf-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:20px;align-items:start}.hf-path,.hf-card{border:1px solid var(--line);background:#fffffff2;box-shadow:0 14px 45px #17223313}.hf-path{position:sticky;top:18px;padding:12px;border-radius:20px}.hf-nav{display:grid;gap:7px}.hf-level{display:grid;grid-template-columns:34px 1fr auto;gap:9px;align-items:center;width:100%;padding:9px;border:0;border-radius:12px;background:transparent;color:var(--ink);cursor:pointer;text-align:left}.hf-level:hover:not(:disabled){background:#edf3ff}.hf-level.active{background:#e5eeff;color:var(--dark)}.hf-level:disabled{cursor:not-allowed;opacity:.45}.hf-num{display:grid;width:34px;height:34px;place-items:center;border:1px solid var(--line);border-radius:50%;background:#fff;font-weight:800}.hf-level.done .hf-num{border-color:var(--green);background:var(--green);color:#fff}.hf-label{font-size:.87rem;font-weight:750;line-height:1.2}.hf-stars{color:var(--gold);font-size:.72rem;white-space:nowrap}.hf-reset{width:100%;margin-top:9px;padding:8px;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:.78rem}
.hf-card{min-height:610px;padding:clamp(20px,4vw,38px);border-radius:24px}.hf-step{color:var(--blue);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.hf-card h2{margin:8px 0 0;font-size:clamp(1.55rem,4vw,2.35rem);letter-spacing:-.035em}.hf-lead{max-width:760px;margin:10px 0 23px;color:var(--muted);font-size:1.02rem;line-height:1.65}.hf-info{margin:18px 0;padding:14px 16px;border-left:4px solid var(--blue);border-radius:8px;background:#edf4ff;line-height:1.55}
.hf-word{display:flex;flex-wrap:wrap;gap:7px;margin:22px 0}.hf-letter{display:grid;width:48px;height:54px;place-items:center;border:2px solid #b9cae8;border-radius:11px;background:#fff;color:var(--dark);font-size:1.4rem;font-weight:900;box-shadow:0 5px 0 #dbe5f5}.hf-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:12px;max-width:620px}.hf-field{padding:14px;border:1px solid var(--line);border-radius:13px;background:#fafcff}.hf-field label{display:block;margin-bottom:7px;font-weight:800}.hf-field input,.hf-code,.hf-long,.hf-custom{width:100%;border:1px solid #aebfd5;border-radius:9px;background:#fff;color:var(--ink)}.hf-field input{padding:9px;text-align:center}.hf-code{max-width:135px;padding:9px 11px;font-family:monospace}.hf-long{padding:12px 14px;font-family:monospace;letter-spacing:.08em}.hf-custom{min-height:96px;padding:13px;resize:vertical}
.hf-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:23px}.hf-btn{padding:11px 17px;border:1px solid var(--blue);border-radius:10px;background:var(--blue);color:#fff;cursor:pointer;font-weight:800}.hf-btn:hover{background:var(--dark)}.hf-btn.alt{background:#fff;color:var(--blue)}.hf-feedback{min-height:25px;margin:16px 0 0;font-weight:750}.hf-feedback.good{color:var(--green)}.hf-feedback.bad{color:var(--red)}.hf-feedback.hint{color:#865900}
.hf-pool{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}.hf-node{min-width:82px;padding:13px 16px;border:2px solid #b9c7d8;border-radius:14px;background:#fff;color:var(--ink);cursor:pointer;box-shadow:0 5px 0 #e1e7ef}.hf-node.sel{border-color:var(--purple);background:#f0ebff;box-shadow:0 5px 0 #cfc1fb}.hf-node strong,.hf-node span{display:block}.hf-node strong{font-size:1.2rem}.hf-node span{margin-top:3px;color:var(--muted);font-size:.78rem}
.hf-treebox{overflow-x:auto;margin:24px 0;padding:24px 10px;border:1px dashed #aebfd5;border-radius:16px;background:#f9fbfe}.hf-tree,.hf-tree ul{display:flex;justify-content:center;position:relative;margin:0;padding:18px 0 0;list-style:none}.hf-tree>ul{padding-top:0}.hf-tree li{position:relative;padding:25px 7px 0;text-align:center}.hf-tree li:before,.hf-tree li:after{content:"";position:absolute;top:0;width:50%;height:25px;border-top:2px solid #8ba0bb}.hf-tree li:before{right:50%}.hf-tree li:after{left:50%;border-left:2px solid #8ba0bb}.hf-tree li:only-child:before,.hf-tree li:only-child:after{display:none}.hf-tree li:only-child{padding-top:0}.hf-tree li:first-child:before,.hf-tree li:last-child:after{border:0}.hf-tree li:last-child:before{border-right:2px solid #8ba0bb;border-radius:0 8px 0 0}.hf-tree li:first-child:after{border-radius:8px 0 0}.hf-tree ul ul:before{content:"";position:absolute;top:0;left:50%;height:18px;border-left:2px solid #8ba0bb}.hf-tree-node{display:inline-grid;min-width:58px;min-height:46px;place-items:center;padding:7px 10px;border:2px solid var(--blue);border-radius:11px;background:#fff;color:var(--dark);box-shadow:0 4px 0 #dce6fb;font-weight:900}.hf-tree-node.leaf{border-color:var(--green);color:#08623f}.hf-edge{position:absolute;top:25px;left:50%;z-index:2;padding:1px 4px;border-radius:5px;background:#fff;color:var(--muted);font:12px monospace}
.hf-forest-heading{margin-top:32px}.hf-forest-heading h3{margin:5px 0 4px;font-size:1.2rem}.hf-forest-heading p{margin:0;color:var(--muted);line-height:1.5}.hf-forestbox{padding:28px 20px}.hf-forest{display:flex;min-width:max-content;gap:38px;align-items:flex-start;justify-content:center}.hf-forest>.hf-tree{flex:0 0 auto}
.hf-table{width:100%;max-width:730px;border-collapse:collapse}.hf-table th,.hf-table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}.hf-table th{color:var(--muted);font-size:.76rem;text-transform:uppercase}.hf-mono{font-family:monospace}.hf-bits{overflow-wrap:anywhere;margin:14px 0;padding:16px;border-radius:12px;background:#172233;color:#aeeaff;font:1.05rem/1.7 monospace;letter-spacing:.08em}.hf-bars{display:grid;gap:8px;margin:20px 0}.hf-bar{display:grid;grid-template-columns:34px minmax(100px,1fr) 42px;gap:9px;align-items:center}.hf-track{height:13px;overflow:hidden;border-radius:99px;background:#e6ecf3}.hf-fill{height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--blue),#56b7df)}.hf-metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(145px,1fr));gap:10px;margin:20px 0}.hf-metric{padding:15px;border-radius:12px;background:#f1f5fa}.hf-metric span,.hf-metric strong{display:block}.hf-metric span{color:var(--muted);font-size:.78rem}.hf-metric strong{margin-top:4px;font-size:1.35rem}.hf-win{padding:22px;border:2px solid #8bd7b7;border-radius:18px;background:#eafaf3;text-align:center}.hf-win b{font-size:1.1rem}.hf-big{font-size:3rem}
@media(max-width:820px){.hf-hero{align-items:flex-start;flex-direction:column}.hf-score{align-self:stretch}.hf-layout{grid-template-columns:1fr}.hf-path{position:static;overflow-x:auto}.hf-nav{display:flex;min-width:max-content}.hf-level{width:165px}.hf-reset{width:auto}.hf-card{min-height:0}}
@media(prefers-reduced-motion:no-preference){.hf-btn,.hf-node,.hf-level{transition:.16s ease}}