:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: rgba(18, 25, 45, 0.92);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #eef2ff;
  --muted: #9ca9c9;
  --primary: #6ea8fe;
  --danger: #ff7b7b;
  --ok: #7fffb2;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1b2750 0%, #0b1020 55%, #060912 100%);
  color: var(--text);
}
.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.auth-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}
.auth-logo {
  font-size: 42px;
  margin-bottom: 10px;
}
.auth-card h1 {
  margin: 0 0 8px;
  font-size: 28px;
}
.auth-subtitle {
  margin: 0 0 24px;
  color: var(--muted);
}
.auth-form {
  display: grid;
  gap: 16px;
}
.auth-form label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}
.auth-form input {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(9, 13, 24, 0.9);
  color: var(--text);
  border-radius: 12px;
  padding: 13px 14px;
  font-size: 15px;
}
.auth-form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(110, 168, 254, 0.15);
}
.auth-form button {
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, #4f8cff, #7a5cff);
  color: white;
  font-size: 15px;
  font-weight: 700;
  padding: 13px 16px;
  cursor: pointer;
}
.auth-form button:disabled {
  opacity: 0.7;
  cursor: wait;
}
.auth-message {
  margin-top: 16px;
  min-height: 22px;
  font-size: 14px;
  color: var(--muted);
}
.auth-message.error { color: var(--danger); }
.auth-message.success { color: var(--ok); }