:root{
  --bg:#0b0d10;
  --panel:#12151b;
  --border:rgba(255,255,255,.08);

  --text:#e5e7eb;
  --muted:#9aa1aa;

  --accent:#38bdf8;
  --accentDim:#1e3a5f;

  --ok:#22c55e;
  --warn:#f59e0b;
  --err:#dc2626;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:var(--bg);
  color:var(--text);
}

.hidden{display:none !important}

.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:18px 28px;
  border-bottom:1px solid var(--border);
  background:rgba(11,13,16,.6);
  backdrop-filter: blur(8px);
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
}

.logo{
  width:40px; height:40px;
  border-radius:10px;
  display:grid; place-items:center;
  font-weight:800;
  background:var(--accentDim);
  color:#e0f2fe;
}

.brand-name{font-weight:800; letter-spacing:.2px}
.brand-sub{font-size:13px; color:var(--muted)}

.session{
  display:flex;
  gap:10px;
  align-items:center;
}

.container{
  max-width:860px;
  margin:0 auto;
  padding:52px 20px 60px;
}

.hero h1{
  margin:0 0 12px;
  font-size:40px;
  font-weight:800;
  letter-spacing:.2px;
}

.subtitle{
  margin:0;
  color:var(--muted);
  max-width:70ch;
  line-height:1.65;
}

.panel{
  margin-top:28px;
  padding:22px;
  border-radius:14px;
  background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01)), var(--panel);
  border:1px solid var(--border);
}

.panel h2{
  margin:0 0 12px;
  font-size:16px;
  font-weight:700;
  letter-spacing:.2px;
}

label{
  display:block;
  margin:0 0 8px;
  color:var(--muted);
  font-size:13px;
}

.input{
  width:100%;
  padding:14px 16px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#0f1218;
  color:var(--text);
  margin:0 0 14px;
}

.input:focus{
  outline:none;
  border-color:rgba(56,189,248,.6);
}

.row{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  align-items:center;
}

.btn{
  padding:13px 16px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#0f172a;
  color:var(--text);
  font-weight:650;
  cursor:pointer;
  transition: background .15s ease, border-color .15s ease, transform .02s ease;
  user-select:none;
}

.btn:hover{border-color:rgba(56,189,248,.25)}
.btn:active{transform:translateY(1px)}

.btn.primary{
  background:#0f172a;
}

.btn.accent{
  background:var(--accentDim);
  border-color:rgba(56,189,248,.22);
  color:#e0f2fe;
}

.pill{
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.02);
  font-size:13px;
  color:var(--text);
}

.hint{
  margin:10px 0 0;
  font-size:13px;
  color:var(--muted);
  line-height:1.5;
}

.notice{
  margin-top:12px;
  padding:12px 12px;
  border-radius:10px;
  border:1px solid rgba(56,189,248,.14);
  background:rgba(30,58,95,.22);
  color:#cfefff;
  font-size:12.5px;
  line-height:1.5;
}

.footer{
  text-align:center;
  padding:22px 16px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:13px;
}

.footer .future{
  margin:8px auto 0;
  max-width:88ch;
  font-size:12px;
  color:var(--muted);
}