:root{
  --bg:#edf4f7; --card:#ffffff; --ink:#123347; --muted:#536d7b; --line:#d4e2e9;
  --brand:#176b87; --brand2:#176b87; --ok:#0da678; --bad:#e5484d; --warn:#e8930c;
  --radius:18px;
}
@media (prefers-color-scheme: dark){
  :root{--bg:#101014; --card:#1b1b22; --ink:#f2f2f7; --muted:#9a9aa8; --line:#2c2c38}
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;}
.wrap{max-width:520px;margin:0 auto;padding:28px 18px 40px}
.brand{text-align:center;margin-bottom:20px}
.logo{width:54px;height:54px;margin:0 auto 10px;border-radius:16px;display:grid;place-items:center;
  font-size:26px;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2));
  box-shadow:0 8px 24px rgba(23,107,135,.16)}
.brand h1{font-size:22px;margin:0 0 8px;letter-spacing:.02em}
.sub{color:var(--muted);font-size:13.5px;line-height:1.65;margin:0}
.steps{display:flex;gap:0;list-style:none;margin:0 0 18px;padding:0}
.steps li{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;color:var(--muted);font-size:12px;position:relative}
.steps li i{width:26px;height:26px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-style:normal;font-size:13px;background:var(--card);z-index:1}
.steps li::before{content:"";position:absolute;top:13px;left:-50%;width:100%;height:2px;background:var(--line)}
.steps li:first-child::before{display:none}
.steps li.on{color:var(--ink);font-weight:600}
.steps li.on i{border-color:var(--brand);background:var(--brand);color:#fff}
.steps li.done{color:var(--ok)}
.steps li.done i{border-color:var(--ok);background:var(--ok);color:#fff}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 20px;box-shadow:0 10px 30px rgba(20,16,60,.06)}
.card.center{text-align:center}
.field{display:block;margin-bottom:16px;text-align:left}
.field span{display:block;font-size:13px;font-weight:600;margin-bottom:7px}
.field input{width:100%;padding:13px 14px;font-size:16px;border:1.5px solid var(--line);border-radius:12px;
  background:transparent;color:var(--ink);outline:none;transition:border-color .15s}
.field input:focus{border-color:var(--brand)}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.04em;text-transform:uppercase}
button{font:inherit;cursor:pointer;border:0;border-radius:12px}
.primary{width:100%;padding:14px;font-size:16px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 8px 20px rgba(23,107,135,.14)}
.primary:disabled{opacity:.55;cursor:wait}
.ghost{width:100%;padding:11px;margin-top:10px;font-size:14px;color:var(--brand);background:transparent;border:1.5px solid var(--line)}
.err{color:var(--bad);font-size:13.5px;line-height:1.6;margin:0 0 12px}
.hint{color:var(--muted);font-size:12.5px;line-height:1.65;margin:14px 0 0}
.muted{color:var(--muted);font-size:14.5px;line-height:1.7}
.spinner{width:44px;height:44px;margin:4px auto 14px;border-radius:50%;
  border:4px solid var(--line);border-top-color:var(--brand);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.queue{display:flex;gap:10px;margin:18px 0 6px}
.queue>div{flex:1;border:1px solid var(--line);border-radius:12px;padding:10px 4px}
.queue b{display:block;font-size:19px}
.queue span{font-size:12px;color:var(--muted)}
.bar{height:8px;border-radius:99px;background:var(--line);overflow:hidden;margin:16px 0 4px}
.bar i{display:block;height:100%;width:12%;border-radius:99px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:width .6s ease}
.big-icon{width:62px;height:62px;margin:2px auto 12px;border-radius:50%;display:grid;place-items:center;font-size:30px;color:#fff}
.big-icon.ok{background:var(--ok)}
.big-icon.bad{background:var(--bad)}
.big-icon.warn{background:var(--warn)}
.foot{text-align:center;color:var(--muted);font-size:12.5px;line-height:1.7;margin-top:22px}
h2{font-size:19px;margin:0 0 8px}

[hidden]{display:none!important}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

#availability{margin:0 0 18px;padding:12px 14px;border-radius:10px;background:var(--bg);color:var(--ink)}
button:focus-visible{outline:3px solid var(--brand);outline-offset:3px}