:root{
  --bg:#f4f6fb;--card:#ffffff;--fg:#0b1220;--muted:#5b6578;--line:#e4e8f0;
  --acc:#0a58ff;--acc-weak:#e8efff;--ok:#1f9d55;--warn:#d97706;--bad:#dc2626;
  --radius:18px;--shadow:0 10px 30px rgba(16,24,40,.08);
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0e1117;--card:#161b24;--fg:#eef2f8;--muted:#98a3b5;--line:#273040;
        --acc:#4d8dff;--acc-weak:#1b2a47;--shadow:0 10px 30px rgba(0,0,0,.4)}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html{height:100%;-webkit-text-size-adjust:100%}
body{margin:0;min-height:100dvh;background:var(--bg);color:var(--fg);
  font:17px/1.45 -apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Inter,sans-serif}
.app{max-width:640px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column;
  padding:0 16px;padding-top:max(12px,env(safe-area-inset-top));padding-bottom:max(16px,env(safe-area-inset-bottom))}
.top{display:flex;align-items:center;justify-content:space-between;padding:10px 2px 14px}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:700;font-size:17px}
.logo{width:30px;height:30px;border-radius:9px;background:var(--acc);color:#fff;display:grid;place-items:center;font-weight:800}
.stepnum{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.main{flex:1;display:flex;flex-direction:column}
.foot{font-size:12.5px;color:var(--muted);padding:22px 2px 6px;line-height:1.4}
.foot a{color:inherit}

.progress{height:4px;background:var(--line);border-radius:4px;overflow:hidden;margin:0 0 16px}
.bar{height:100%;background:var(--acc);border-radius:4px;transition:width .5s ease}

.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 20px;animation:in .3s ease}
@keyframes in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.hero{padding:10px 2px}
.eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);font-weight:700}
h1{font-size:30px;line-height:1.15;letter-spacing:-.02em;margin:10px 0 12px}
.lead{color:var(--muted);margin:0 0 20px;font-size:17px}
.cta{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.facts{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.facts li{background:var(--card);border-radius:14px;padding:12px 14px;font-size:15px;box-shadow:var(--shadow)}

.q{font-size:23px;line-height:1.25;letter-spacing:-.01em;margin:0 0 8px}
.help{color:var(--muted);font-size:15px;margin:0 0 16px}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;border:1.5px solid var(--line);border-radius:14px;padding:13px 14px;cursor:pointer;
  background:transparent;transition:border-color .15s,background .15s;user-select:none}
.opt input{position:absolute;opacity:0;pointer-events:none}
.opt .mark{flex:none;width:22px;height:22px;border-radius:50%;border:2px solid var(--line);margin-top:2px;position:relative}
.opt.multi .mark{border-radius:7px}
.opt .txt{flex:1;min-width:0}
.opt .lbl{font-weight:600;font-size:16.5px}
.opt .hint{color:var(--muted);font-size:13.5px;margin-top:2px}
.opt.on{border-color:var(--acc);background:var(--acc-weak)}
.opt.on .mark{border-color:var(--acc);background:var(--acc)}
.opt.on .mark:after{content:"";position:absolute;left:7px;top:3px;width:5px;height:10px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}
.other{margin-top:10px}
input[type=text],input[type=number],textarea{width:100%;font:inherit;color:var(--fg);background:var(--bg);border:1.5px solid var(--line);
  border-radius:14px;padding:13px 14px;font-size:16px;outline:none}
input:focus,textarea:focus{border-color:var(--acc)}
textarea{min-height:120px;resize:vertical}
.details{margin-top:16px;border-top:1px solid var(--line);padding-top:12px;font-size:15px;color:var(--muted)}
.details summary{cursor:pointer;color:var(--acc);font-weight:600;list-style:none}
.details summary::-webkit-details-marker{display:none}
.details p{margin:8px 0 0}
.err{margin-top:12px;color:var(--bad);font-size:14.5px}

.actions{position:sticky;bottom:0;display:flex;gap:10px;padding:14px 0 0;margin-top:14px;
  background:linear-gradient(180deg,transparent,var(--bg) 35%)}
.btn{appearance:none;border:0;border-radius:14px;padding:15px 18px;font:inherit;font-weight:700;font-size:16.5px;cursor:pointer;
  text-align:center;text-decoration:none;display:inline-block;min-height:50px;transition:transform .08s,opacity .15s}
.btn:active{transform:scale(.98)}
.btn.primary{background:var(--acc);color:#fff;flex:1}
.btn.ghost{background:var(--card);color:var(--fg);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn.small{padding:8px 14px;min-height:0;font-size:14px}
.btn[disabled]{opacity:.5;cursor:default}

.loading{display:flex;flex-direction:column;align-items:center;gap:16px;padding:36px 8px;color:var(--muted);text-align:center}
.spinner{width:34px;height:34px;border-radius:50%;border:3px solid var(--line);border-top-color:var(--acc);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* результат */
.r-head{font-size:24px;line-height:1.2;margin:0 0 10px;letter-spacing:-.01em}
.r-sum{color:var(--muted);margin:0 0 18px;font-size:15.5px}
.route{border:1.5px solid var(--line);border-radius:16px;padding:16px;margin:0 0 12px}
.route .rt{display:flex;align-items:center;justify-content:space-between;gap:10px}
.route h3{margin:0;font-size:19px}
.badge{font-size:12px;font-weight:700;padding:5px 9px;border-radius:999px;white-space:nowrap}
.b-recommended{background:#e6f6ec;color:var(--ok)}.b-possible{background:#fff4e0;color:var(--warn)}
.b-weak{background:var(--line);color:var(--muted)}.b-not_eligible{background:#fde8e8;color:var(--bad)}
@media (prefers-color-scheme:dark){.b-recommended{background:#12331f}.b-possible{background:#3a2a0d}.b-not_eligible{background:#3d1515}}
.fit{height:6px;background:var(--line);border-radius:6px;margin:10px 0 12px;overflow:hidden}
.fit i{display:block;height:100%;background:var(--acc)}
.route p{margin:0 0 10px;font-size:15px}
.kv{display:grid;grid-template-columns:1fr;gap:6px;margin:10px 0;font-size:14.5px}
.kv div{display:flex;gap:8px}.kv b{flex:none;color:var(--muted);font-weight:600;min-width:112px}
.route h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:14px 0 6px}
.route ul{margin:0;padding-left:20px;font-size:14.5px}.route li{margin:3px 0}
.flags{border-radius:16px;padding:14px 16px;margin:16px 0;background:#fff4e0;color:#7c3e00}
@media (prefers-color-scheme:dark){.flags{background:#3a2a0d;color:#ffd79a}}
.flags h4,.block h4{margin:0 0 8px;font-size:15px}
.flags ul,.block ul{margin:0;padding-left:20px;font-size:14.5px}
.block{margin:16px 0}
.answers{font-size:13.5px;color:var(--muted)}
.answers summary{cursor:pointer;font-weight:600}
.answers dl{margin:8px 0 0}.answers dt{font-weight:600;margin-top:6px}.answers dd{margin:0}

.prose h2{margin:0 0 10px;font-size:24px}.prose h3{font-size:17px;margin:18px 0 6px}.prose p,.prose li{font-size:15.5px}

@media (min-width:700px){h1{font-size:38px}.q{font-size:26px}.kv{grid-template-columns:1fr 1fr}}
@media print{
  body{background:#fff;color:#000}.app{max-width:none;padding:0}.top,.foot,.noprint,.actions{display:none!important}
  .card{box-shadow:none;padding:0}.route{break-inside:avoid}
}