:root {
  --bg: #07161b;
  --panel: #0d2230;
  --line: rgba(143, 195, 214, 0.2);
  --text: #f1f7f8;
  --muted: #9bb0ba;
  --accent: #55e5aa;
  --danger: #ff9c83;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(24, 142, 134, 0.24), transparent 34rem),
    linear-gradient(145deg, #061318 0%, #0a1f2b 56%, #071117 100%);
}

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

.auth-card {
  width: min(100%, 440px);
  padding: 38px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(155deg, rgba(17, 45, 57, 0.96), rgba(8, 25, 35, 0.98));
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}

.auth-brand {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #041913;
  background: linear-gradient(135deg, var(--accent), #8af0dc);
  font: 700 25px/1 "Space Grotesk", sans-serif;
}

.eyebrow {
  margin: 22px 0 8px;
  color: #88a3ae;
  font: 500 12px/1.4 "Space Grotesk", sans-serif;
  letter-spacing: 0.16em;
}

h1 {
  margin: 0;
  font: 700 clamp(29px, 7vw, 38px)/1.08 "Space Grotesk", sans-serif;
}

.auth-copy,
.auth-note {
  color: var(--muted);
  line-height: 1.55;
}

.auth-copy { margin: 15px 0 24px; }
.auth-note { margin: 22px 0 0; font-size: 13px; }

.auth-error {
  margin: 0 0 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 156, 131, 0.35);
  border-radius: 12px;
  color: var(--danger);
  background: rgba(135, 46, 34, 0.2);
}

form { display: grid; gap: 10px; }
label { margin-top: 7px; font-weight: 600; }

input {
  width: 100%;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  background: rgba(2, 15, 22, 0.72);
  font: inherit;
  outline: none;
}

input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(85, 229, 170, 0.12);
}

button {
  margin-top: 14px;
  padding: 14px 18px;
  border: 0;
  border-radius: 12px;
  color: #041913;
  background: var(--accent);
  font: 700 16px/1 "Space Grotesk", sans-serif;
  cursor: pointer;
}

button:hover { filter: brightness(1.06); }

@media (max-width: 520px) {
  .auth-shell { align-items: start; padding: 16px; }
  .auth-card { margin-top: 7vh; padding: 28px 22px; border-radius: 20px; }
}