:root {
  --bg: #000;
  --panel: #121212;
  --elevated: #1f1f1f;
  --text: #fff;
  --subdued: #b3b3b3;
  --accent: #4dabf7;
  --error: #ff8787;
  --font: 'Figtree', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 32px 16px;
  background: radial-gradient(ellipse at top, #0d2a4a 0%, var(--bg) 60%);
  color: var(--text);
  font: 16px/1.5 var(--font);
}

.card {
  width: 100%;
  max-width: 440px;
  background: var(--panel);
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  box-shadow: 0 24px 60px rgb(0 0 0 / 0.5);
}

.logo {
  display: block;
  margin: 0 auto 12px;
}

h1 {
  margin: 0;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 8px 0 28px;
  color: var(--subdued);
}

.unlock {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

input {
  flex: 1;
  min-width: 0;
  height: 48px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid #ffffff2a;
  background: var(--elevated);
  color: var(--text);
  font: inherit;
}

input:focus-visible,
button:focus-visible,
.download:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button,
.download {
  height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #000;
  font: 700 16px var(--font);
  cursor: pointer;
  transition: transform 0.1s, filter 0.15s;
}

button:hover,
.download:hover {
  transform: scale(1.03);
  filter: brightness(1.08);
}

.download {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.details {
  margin: 12px 0 24px;
  color: var(--subdued);
  font-size: 14px;
}

.steps {
  margin: 0;
  padding: 16px 16px 16px 36px;
  background: var(--elevated);
  border-radius: 12px;
  text-align: left;
  font-size: 14px;
  color: var(--subdued);
}

.steps li + li {
  margin-top: 8px;
}

.steps strong {
  color: var(--text);
}

.error {
  color: var(--error);
  font-size: 14px;
}

footer {
  color: #7a7a7a;
  font-size: 13px;
  text-align: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

@media (max-width: 480px) {
  .card {
    padding: 32px 20px;
  }

  .unlock {
    flex-direction: column;
  }
}