:root {
  color-scheme: dark;
  --bg: #07110f;
  --panel: #0d1a17;
  --line: rgba(255,255,255,.09);
  --text: #effaf6;
  --muted: #91aaa2;
  --accent: #66e6ba;
  --danger: #ff8e8e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0%, rgba(102,230,186,.16), transparent 32rem),
    linear-gradient(180deg, #07110f, #040908 75%);
}
.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}
.login-card {
  width: min(100%, 410px);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 30px;
  background: linear-gradient(145deg, rgba(17,35,31,.97), rgba(9,21,18,.97));
  box-shadow: 0 28px 90px rgba(0,0,0,.35);
}
.brand-mark {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: rgba(102,230,186,.11);
  color: var(--accent);
  font-weight: 900;
  font-size: 1.35rem;
}
.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .16em;
}
h1 {
  margin: 0;
  font-size: 2.6rem;
  letter-spacing: -.045em;
}
.subtitle {
  margin: 8px 0 24px;
  color: var(--muted);
}
.error {
  margin-bottom: 18px;
  border: 1px solid rgba(255,142,142,.28);
  background: rgba(255,142,142,.08);
  color: var(--danger);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: .84rem;
  line-height: 1.4;
}
.hidden { display: none; }
form {
  display: grid;
  gap: 16px;
}
label span {
  display: block;
  margin-bottom: 7px;
  font-size: .78rem;
  color: var(--muted);
}
input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: rgba(0,0,0,.2);
  color: var(--text);
  padding: 13px 14px;
  font: inherit;
  outline: none;
}
input:focus {
  border-color: rgba(102,230,186,.55);
  box-shadow: 0 0 0 3px rgba(102,230,186,.08);
}
button {
  margin-top: 4px;
  border: 0;
  border-radius: 13px;
  padding: 13px 16px;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
  background: var(--accent);
  color: #06231a;
}
.foot {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: .72rem;
  text-align: center;
}