:root {
  color-scheme: dark;
  --page: #070a11;
  --panel: #101522;
  --line: #2a3346;
  --text: #eef0ff;
  --muted: #979fbe;
  --purple: #7858ff;
  --purple-bright: #8268ff;
  --warning: #f3aa27;
  --danger: #ff7277;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--page);
}

body {
  min-height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at 50% -25%, rgba(120, 88, 255, .1), transparent 44%),
    var(--page);
  color: var(--text);
  font: 500 16px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.lg-card {
  width: min(100%, 520px);
  padding: 34px 36px 30px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(16, 21, 34, .98);
  box-shadow: 0 24px 80px rgba(0, 0, 0, .42);
}

.lg-brand {
  margin: 0;
  font-size: clamp(30px, 5vw, 38px);
  line-height: 1.12;
  font-weight: 850;
  letter-spacing: -.025em;
}

.lg-brand span {
  color: var(--purple-bright);
}

.lg-sub {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.45;
}

.lg-safe {
  margin: 24px 0;
  padding: 11px 14px;
  border: 1px solid rgba(243, 170, 39, .46);
  border-radius: 12px;
  background: rgba(243, 170, 39, .09);
  color: var(--warning);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .075em;
  text-align: center;
}

.lg-intro {
  display: grid;
  gap: 7px;
  margin-bottom: 22px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(7, 10, 18, .78);
  color: #cdd2e9;
  font-size: 15px;
  line-height: 1.55;
}

.lg-intro strong {
  color: var(--text);
  font-size: 16px;
}

.lg-intro span {
  color: var(--muted);
}

.lg-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  width: 100%;
  min-height: 56px;
  padding: 13px 20px;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--purple), var(--purple-bright));
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(120, 88, 255, .2);
}

.lg-submit:hover {
  filter: brightness(1.06);
}

.lg-submit:focus-visible {
  outline: 3px solid #b8a9ff;
  outline-offset: 3px;
}

.lg-submit:disabled {
  cursor: progress;
  opacity: .68;
}

.lg-submit span {
  font-size: 21px;
  line-height: 1;
}

.lg-err {
  min-height: 1.5em;
  margin-top: 10px;
  color: var(--danger);
  font-size: 13px;
  text-align: center;
}

.lg-alt {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  text-align: center;
}

@media (max-width: 560px) {
  body {
    place-items: start center;
    padding: 14px;
  }

  .lg-card {
    padding: 28px 20px 24px;
    border-radius: 19px;
  }

  .lg-brand {
    font-size: 31px;
  }

  .lg-safe {
    margin: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}