:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #07111f;
  color: #edf6ff;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 20%, rgba(18, 151, 192, .22), transparent 38%),
    radial-gradient(circle at 85% 80%, rgba(25, 83, 143, .2), transparent 40%),
    #07111f;
}

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

.login-card {
  width: min(100%, 430px);
  padding: 36px;
  border: 1px solid rgba(120, 194, 223, .2);
  border-radius: 22px;
  background: rgba(9, 24, 41, .94);
  box-shadow: 0 28px 80px rgba(0, 0, 0, .36);
}

.brand-logo {
  display: block;
  width: min(100%, 260px);
  height: 118px;
  margin: -14px auto 2px;
  object-fit: contain;
  filter: drop-shadow(0 10px 26px rgba(23, 167, 204, .2));
}

.heading { margin: 24px 0 28px; }
.heading h1 { margin: 4px 0 8px; font-size: 30px; }
.heading p { margin: 0; color: #9bb1c7; line-height: 1.5; }
.heading .eyebrow { color: #4cc8e7; font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }

form { display: grid; gap: 10px; }
label { margin-top: 7px; color: #c6d5e3; font-size: 13px; font-weight: 700; }
input {
  width: 100%;
  border: 1px solid #27425d;
  border-radius: 10px;
  padding: 13px 14px;
  background: #0b1b2d;
  color: #fff;
  outline: none;
}
input:focus { border-color: #28b6d8; box-shadow: 0 0 0 3px rgba(40, 182, 216, .12); }
button {
  margin-top: 14px;
  border: 0;
  border-radius: 10px;
  padding: 13px 16px;
  background: linear-gradient(135deg, #20b5d7, #08779f);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}
button:disabled { opacity: .55; cursor: wait; }
.error { margin: 7px 0 0; color: #ff9b9b; font-size: 13px; }
.hint { margin: 0; color: #8099b0; font-size: 12px; }
.notice {
  margin-bottom: 10px;
  border: 1px solid rgba(255, 194, 89, .35);
  border-radius: 10px;
  padding: 12px;
  background: rgba(255, 179, 46, .09);
  color: #ffd78e;
  font-size: 13px;
  line-height: 1.45;
}

@media (max-width: 520px) {
  .login-shell { padding: 14px; }
  .login-card { padding: 26px 22px; }
}