*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#050a18;--s1:#0c1425;--s2:#131d33;
  --line:#1e2d48;--line-h:#2a3d5c;
  --tx:#c0c8d8;--tx2:#6b7a94;--hi:#f0f4fa;
  --blue:#3b82f6;--blue-h:#2563eb;
  --ok:#22c55e;--ok-bg:rgba(34,197,94,.08);
  --warn:#eab308;--warn-bg:rgba(234,179,8,.08);
  --err:#ef4444;--err-bg:rgba(239,68,68,.08);
  --ff:'Noto Sans SC',system-ui,sans-serif;
  --fm:'JetBrains Mono',ui-monospace,monospace;
  --r:14px;
}
html{font-size:17px;-webkit-font-smoothing:antialiased}
body{font-family:var(--ff);background:var(--bg);color:var(--tx);line-height:1.65;min-height:100dvh;display:flex;flex-direction:column}

/* ── Wrap ── */
.wrap{max-width:1080px;width:100%;margin:0 auto;padding-left:40px;padding-right:40px}

/* ── Topbar ── */
.topbar{position:sticky;top:0;z-index:100;background:rgba(5,10,24,.78);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.topbar>.wrap{height:72px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;cursor:pointer}
.brand-img{width:44px;height:44px;border-radius:12px;object-fit:contain}
.brand-txt{font-size:1.4rem;font-weight:900;color:var(--hi);letter-spacing:-.02em}
.brand-txt b{color:var(--blue);font-weight:900}
.tab-bar{display:flex;gap:4px;background:var(--s1);padding:4px;border-radius:12px}
.tab{padding:10px 24px;font-size:.95rem;font-weight:500;color:var(--tx2);text-decoration:none;border-radius:10px;transition:color .2s,background .2s;cursor:pointer}
.tab:hover{color:var(--tx)}
.tab.is-on{color:var(--hi);background:var(--s2)}

/* ── Hero ── */
.hero{padding:64px 0 24px;text-align:center}
.hero h1{font-size:clamp(2.2rem,5.5vw,3.6rem);font-weight:900;color:var(--hi);letter-spacing:-.05em;line-height:1.1}
.hero p{color:var(--tx2);font-size:1.15rem;margin-top:16px;font-weight:400;line-height:1.7}

/* ── Full-width images ── */
.full-img{width:100%;border-radius:16px;display:block;object-fit:cover}
.hero-banner{max-height:280px;margin-bottom:32px;opacity:.8}
.flow-img{max-height:160px;margin-top:48px;opacity:.85}
.about-banner{max-height:240px;margin-bottom:36px;opacity:.7}

/* ── Card ── */
.card{background:var(--s1);border:1px solid var(--line);border-radius:18px;padding:44px 48px;margin-bottom:28px}
.sec-title{font-size:1.1rem;font-weight:700;color:var(--hi);margin-bottom:8px;letter-spacing:-.01em}
.sec-desc{color:var(--tx2);font-size:.95rem;margin-bottom:28px}
.mt48{margin-top:48px}

/* ── Form ── */
.lbl{display:block;font-size:.95rem;font-weight:600;color:var(--tx);margin:24px 0 10px}
.lbl:first-of-type{margin-top:0}
.inp{
  width:100%;padding:20px 24px;
  background:var(--s2);border:1.5px solid var(--line);border-radius:var(--r);
  color:var(--hi);font-size:1.1rem;font-family:var(--fm);
  outline:none;transition:border-color .2s,box-shadow .2s;
}
.inp::placeholder{color:var(--tx2);opacity:.45}
.inp:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(59,130,246,.1)}

/* ── Model row ── */
.model-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-bottom:40px}
.mc{padding:28px 30px;border:1.5px solid var(--line);border-radius:16px;cursor:pointer;position:relative;transition:all .2s}
.mc:hover{border-color:var(--line-h)}
.mc.on{border-color:var(--blue);background:rgba(59,130,246,.04);box-shadow:0 0 0 1px var(--blue)}
.mc .mc-n{font-size:1.2rem;font-weight:700;color:var(--hi)}
.mc .mc-id{font-size:.85rem;color:var(--tx2);margin-top:5px;font-family:var(--fm)}
.mc .mc-ck{position:absolute;top:16px;right:16px;width:28px;height:28px;border-radius:50%;background:var(--blue);color:#fff;display:none;align-items:center;justify-content:center;font-size:15px;font-weight:700}
.mc.on .mc-ck{display:flex}

/* ── Foot row ── */
.foot-row{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.safe-note{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--tx2);line-height:1.5}
.safe-note svg{color:var(--ok);opacity:.55;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:20px 52px;background:var(--blue);color:#fff;border:none;border-radius:var(--r);
  font-size:1.15rem;font-weight:700;font-family:var(--ff);cursor:pointer;
  transition:background .15s,transform .1s;white-space:nowrap;
}
.btn:hover{background:var(--blue-h)}
.btn:active{transform:scale(.98)}
.btn:disabled{background:var(--s2);color:var(--tx2);cursor:not-allowed;transform:none}
.btn svg{transition:transform .15s}
.btn:hover svg{transform:translateX(3px)}

/* ── Progress ── */
.prog-row{display:flex;align-items:center;gap:14px;margin-bottom:18px;font-size:1.05rem;font-weight:500}
.prog-dot{width:12px;height:12px;border-radius:50%;background:var(--blue);animation:blink 1.4s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.2}}
.prog-track{height:6px;background:var(--s2);border-radius:4px;overflow:hidden}
.prog-fill{height:100%;width:0;background:linear-gradient(90deg,var(--blue),#60a5fa);border-radius:4px;transition:width .5s cubic-bezier(.4,0,.2,1)}

/* ── Result grid ── */
.result-grid{display:grid;grid-template-columns:280px 1fr;gap:40px;margin-bottom:32px;align-items:start}
.score-side{display:flex;flex-direction:column;align-items:center;padding-top:12px}
.ring-wrap{position:relative;width:240px;height:240px}
.ring-svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--s2);stroke-width:12}
.ring-fg{fill:none;stroke:var(--ok);stroke-width:12;stroke-linecap:round;transition:stroke-dashoffset 1.3s cubic-bezier(.4,0,.2,1)}
.ring-fg.warn{stroke:var(--warn)}.ring-fg.fail{stroke:var(--err)}
.ring-inner{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.r-val{font-size:4.2rem;font-weight:900;color:var(--hi);letter-spacing:-.06em;line-height:1}
.r-tag{font-size:1.05rem;font-weight:700;color:var(--ok);margin-top:8px}
.r-tag.warn{color:var(--warn)}.r-tag.fail{color:var(--err)}
.det-id{font-size:.85rem;color:var(--tx2);font-family:var(--fm);margin-top:16px}

.checks-side{background:var(--s1);border:1px solid var(--line);border-radius:18px;padding:36px 40px}
.ck{display:flex;justify-content:space-between;align-items:center;padding:20px 0;border-bottom:1px solid var(--line)}
.ck:last-child{border-bottom:none}
.ck-l{display:flex;align-items:center;gap:16px}
.ck-i{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex-shrink:0}
.ck-i.ok{background:var(--ok-bg);color:var(--ok)}
.ck-i.no{background:var(--err-bg);color:var(--err)}
.ck-n{font-size:1.1rem;font-weight:500;color:var(--tx)}
.ck-s{font-size:.95rem;font-weight:700}
.ck-s.ok{color:var(--ok)}.ck-s.no{color:var(--err)}

/* ── Metrics ── */
.met-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.met{background:var(--s1);border:1px solid var(--line);border-radius:16px;padding:32px;text-align:center}
.met-l{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--tx2)}
.met-v{font-size:2.2rem;font-weight:900;color:var(--hi);margin-top:10px;font-family:var(--fm);letter-spacing:-.03em}
.met-u{font-size:.82rem;color:var(--tx2);font-weight:400;margin-left:3px}

/* ── History ── */
.hr{display:flex;justify-content:space-between;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);cursor:pointer;transition:opacity .15s}
.hr:last-child{border-bottom:none}
.hr:hover{opacity:.6}
.hr-l{display:flex;align-items:center;gap:16px}
.hr-id{font-weight:700;color:var(--hi);font-size:1.1rem}
.hr-m{font-size:.88rem;color:var(--tx2);font-family:var(--fm)}
.hr-t{font-size:.78rem;color:var(--tx2);opacity:.6}
.hr-s{font-weight:900;font-size:1.4rem;font-family:var(--fm)}
.hr-s.ok{color:var(--ok)}.hr-s.warn{color:var(--warn)}.hr-s.no{color:var(--err)}
.empty{text-align:center;color:var(--tx2);padding:56px 0;font-size:1.05rem}

/* ── About ── */
.about-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.about-cols p{color:var(--tx);line-height:1.85;font-size:1rem}
.about-cols strong{color:var(--hi)}
.card-badge{width:80px;height:80px;margin-bottom:16px;border-radius:14px}

/* ── Footer ── */
.foot{border-top:1px solid var(--line);padding:32px 40px;display:flex;align-items:center;justify-content:center;gap:14px;font-size:.9rem;color:var(--tx2)}
.foot-logo{width:28px;height:28px;border-radius:8px;opacity:.55}

/* ── Anim ── */
@keyframes up{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.card,.result-grid,.met-row,.about-cols,.hero{animation:up .55s cubic-bezier(.4,0,.2,1) both}
.result-grid{animation-delay:.06s}.met-row{animation-delay:.14s}

/* ── Responsive ── */
@media(max-width:768px){
  .wrap{padding-left:20px;padding-right:20px}
  .topbar>.wrap{height:64px}
  .card{padding:32px 28px}
  .result-grid{grid-template-columns:1fr}
  .score-side{padding:0 0 20px}
  .met-row{grid-template-columns:repeat(2,1fr)}
  .foot-row{flex-direction:column;align-items:stretch}
  .btn{width:100%;justify-content:center}
  .model-row{grid-template-columns:1fr}
  .about-cols{grid-template-columns:1fr}
  .hero h1{font-size:2rem}
}
@media(max-width:480px){
  .tab{padding:8px 16px;font-size:.85rem}
  .brand-img{width:36px;height:36px}
  .brand-txt{font-size:1.2rem}
}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}