*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#05051a;
  --card:#0d0d2b;
  --card-border:rgba(56,189,248,.15);
  --accent:#38bdf8;
  --green:#22c55e;
  --red:#ef4444;
  --text:#e2e8f0;
  --muted:#64748b;
  --radius:16px;
}

body{background:var(--bg);color:var(--text);font-family:'Barlow',sans-serif;min-height:100vh;overflow-x:hidden}

/* Aurora */
.aurora{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.18;animation:drift 18s ease-in-out infinite alternate}
.b1{width:600px;height:600px;background:radial-gradient(#38bdf8,#6366f1);top:-200px;left:-100px;animation-duration:20s}
.b2{width:500px;height:500px;background:radial-gradient(#a855f7,#ec4899);bottom:-200px;right:-100px;animation-duration:25s}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(40px,30px) scale(1.1)}}

.page{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:1.5rem 1rem 3rem}

.back-btn{align-self:flex-start;color:var(--accent);font-size:.9rem;font-weight:600;text-decoration:none;margin-bottom:1.5rem;opacity:.8;transition:opacity .2s}
.back-btn:hover{opacity:1}

.card{background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:2rem 1.5rem;width:100%;max-width:480px;box-shadow:0 8px 40px rgba(0,0,0,.4)}

.card-eyebrow{font-family:'Barlow Condensed',sans-serif;font-size:.85rem;font-weight:700;letter-spacing:.12em;color:var(--accent);text-transform:uppercase;margin-bottom:.5rem}
.card-title{font-family:'Barlow Condensed',sans-serif;font-size:2rem;font-weight:800;color:#fff;margin-bottom:.5rem}
.card-sub{font-size:.9rem;color:var(--muted);line-height:1.5;margin-bottom:1.75rem}

.form-group{margin-bottom:1.25rem}
.fld-lbl{display:block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:.5rem}
.fld-inp{width:100%;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:10px;color:#fff;font-size:1rem;font-family:'Barlow',sans-serif;padding:.7rem 1rem;outline:none;transition:border-color .2s}
.fld-inp:focus{border-color:var(--accent)}

/* Platform picker */
.plat-pick{position:relative}
.plat-sel{display:flex;align-items:center;gap:.6rem;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:10px;padding:.7rem 1rem;cursor:pointer;transition:border-color .2s;min-height:46px}
.plat-sel:hover,.plat-sel.open{border-color:var(--accent)}
.plat-sel-img{width:28px;height:20px;object-fit:contain;display:none}
.plat-sel-img.vis{display:block}
.plat-sel-txt{flex:1;font-size:.95rem;color:var(--muted)}
.plat-sel-txt.chosen{color:#fff;font-weight:600}
.plat-arrow{color:var(--muted);font-size:.75rem;transition:transform .2s}
.plat-sel.open .plat-arrow{transform:rotate(180deg)}
.plat-drop{display:none;position:absolute;top:calc(100% + 6px);left:0;right:0;background:#12123a;border:1px solid var(--card-border);border-radius:12px;max-height:220px;overflow-y:auto;z-index:100;box-shadow:0 8px 32px rgba(0,0,0,.5)}
.plat-drop.open{display:block}
.plat-opt{display:flex;align-items:center;gap:.7rem;padding:.6rem 1rem;cursor:pointer;transition:background .15s}
.plat-opt:hover{background:rgba(56,189,248,.08)}
.plat-opt img{width:32px;height:22px;object-fit:contain}
.plat-opt-name{font-size:.9rem;font-weight:600}

.btn-check{width:100%;background:linear-gradient(135deg,#0ea5e9,#6366f1);color:#fff;border:none;border-radius:12px;padding:.85rem;font-size:1rem;font-weight:700;font-family:'Barlow Condensed',sans-serif;letter-spacing:.05em;cursor:pointer;transition:opacity .2s,transform .1s;margin-top:.25rem}
.btn-check:hover{opacity:.9}
.btn-check:active{transform:scale(.98)}
.btn-check:disabled{opacity:.5;cursor:not-allowed}

/* Result */
#result{margin-top:1.5rem}
.res-card{border-radius:12px;padding:1.25rem 1.5rem;text-align:center}
.res-card.ok{background:rgba(34,197,94,.1);border:1px solid rgba(34,197,94,.3)}
.res-card.zero{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.3)}
.res-card.notfound{background:rgba(100,116,139,.1);border:1px solid rgba(100,116,139,.3)}
.res-num{font-family:'Barlow Condensed',sans-serif;font-size:3.5rem;font-weight:900;line-height:1}
.res-num.ok{color:var(--green)}
.res-num.zero{color:var(--red)}
.res-lbl{font-size:.9rem;margin-top:.4rem;color:var(--muted)}
.res-detail{margin-top:.75rem;font-size:.82rem;color:var(--muted);line-height:1.5}
.res-err{color:var(--red);font-size:.9rem;text-align:center;padding:.75rem}

.loading{text-align:center;color:var(--muted);font-size:.9rem;padding:1rem;animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:.5}50%{opacity:1}}