:root {
  color-scheme: dark;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #070a12;
  color: #f4f6fb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 15%, rgba(116, 95, 255, 0.22), transparent 34rem),
    radial-gradient(circle at 80% 80%, rgba(0, 204, 170, 0.12), transparent 28rem),
    #070a12;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: min(440px, 100%);
  padding: 38px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 24px;
  background: rgba(16, 20, 33, .92);
  box-shadow: 0 32px 90px rgba(0,0,0,.45);
}

.auth-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  font-weight: 800;
  letter-spacing: .08em;
  background: linear-gradient(135deg, #7d6cff, #35d2c4);
  color: white;
}

.eyebrow { margin: 24px 0 6px; color: #9ca7bf; text-transform: uppercase; letter-spacing: .14em; font-size: 12px; }
h1 { margin: 0; font-size: 28px; }
.intro { margin: 10px 0 28px; color: #aeb7ca; }
form { display: grid; gap: 18px; }
label { display: grid; gap: 8px; color: #c9d0df; font-size: 14px; }
input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 11px;
  background: #0b0f1a;
  color: #fff;
  font: inherit;
}
input:focus { outline: 2px solid #7767ff; border-color: transparent; }
button {
  margin-top: 4px;
  padding: 13px 16px;
  border: 0;
  border-radius: 11px;
  background: linear-gradient(135deg, #7767ff, #4a9cff);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button:disabled { opacity: .55; cursor: wait; }
.status { min-height: 22px; margin-top: 16px; color: #ff9d9d; font-size: 14px; }