:root {
  --bg: #0b0e13;
  --panel: #141923;
  --line: #2e3950;
  --text: #e7ecf5;
  --muted: #8b97ad;
  --accent: #c8f04a;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 80% 0%, rgba(90, 162, 255, .08), transparent 60%),
    radial-gradient(700px 400px at 0% 100%, rgba(200, 240, 74, .07), transparent 60%),
    var(--bg);
  font-family: 'Archivo', sans-serif;
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  width: min(100%, 430px);
  padding: 34px;
  border: 1px solid #232b3b;
  border-radius: 14px;
  background: rgba(20, 25, 35, .96);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .4);
}
.brand { display: flex; align-items: center; gap: 11px; margin-bottom: 42px; }
.brand-mark {
  width: 38px; height: 38px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 10px; background: #10141c;
}
.brand-mark span {
  width: 16px; height: 16px; display: block; position: relative;
  border: 3px solid var(--accent); border-radius: 50%;
}
.brand-mark span::after {
  content: ''; position: absolute; inset: 3px; border-radius: 50%; background: var(--accent);
}
.brand-text { font-size: 17px; font-weight: 500; line-height: 1.1; }
.brand-text b { font-weight: 800; }
.brand-text small {
  display: block; margin-top: 4px; color: #5b6678;
  font: 500 9px 'IBM Plex Mono', monospace; letter-spacing: 1.7px; text-transform: uppercase;
}
.intro { margin-bottom: 26px; }
.eyebrow {
  margin: 0 0 10px; color: var(--accent);
  font: 500 10px 'IBM Plex Mono', monospace; letter-spacing: 2px;
}
h1 { margin: 0 0 9px; font-size: 29px; letter-spacing: -.5px; }
.intro > p:last-child { margin: 0; color: var(--muted); line-height: 1.55; }
label { display: block; margin-bottom: 17px; }
label span { display: block; margin-bottom: 7px; color: var(--muted); font-size: 12px; font-weight: 600; }
input {
  width: 100%; padding: 12px 13px; color: var(--text); background: #10141c;
  border: 1px solid var(--line); border-radius: 8px; font: 14px 'Archivo', sans-serif;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(200, 240, 74, .1); }
button {
  width: 100%; margin-top: 7px; padding: 12px; border: 0; border-radius: 8px;
  color: #11150a; background: var(--accent); font: 700 14px 'Archivo', sans-serif; cursor: pointer;
}
button:hover { background: #d6fa62; }
.error {
  margin-bottom: 18px; padding: 11px 12px; border: 1px solid rgba(255, 77, 109, .35);
  border-radius: 8px; color: #ff8197; background: rgba(255, 77, 109, .1); font-size: 13px;
}
@media (max-width: 520px) {
  .login-card { padding: 27px 22px; }
}