:root {
  --bg: #0a0b0d;
  --surface: #14161a;
  --line: #2a2d33;
  --ink: #f4f4f0;
  --ink-2: #a4a8b0;
  --accent: #ff7733;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  font:
    15px/1.6 Inter,
    system-ui,
    sans-serif;
  background:
    radial-gradient(
      700px 400px at 90% 10%,
      rgba(255, 119, 51, 0.12),
      transparent 60%
    ),
    var(--bg);
  color: var(--ink);
  display: grid;
  place-items: center;
  padding: 32px 24px;
}
.card {
  max-width: 620px;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px 36px;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.6);
}
h1 {
  font-size: 26px;
  font-weight: 600;
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}
.subtitle {
  color: var(--ink-2);
  font-size: 14px;
  margin: 0 0 24px;
}
h2 {
  font-size: 17px;
  font-weight: 600;
  margin: 22px 0 8px;
  color: var(--ink);
}
p,
ul {
  color: var(--ink-2);
  font-size: 14px;
  margin: 0 0 12px;
}
ul {
  padding-left: 20px;
}
li {
  margin-bottom: 6px;
}
.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 28px;
  height: 46px;
  background: var(--accent);
  color: #0c0d0f;
  text-decoration: none;
  border-radius: 10px;
  font:
    600 14px Inter,
    sans-serif;
  transition: background-color 0.15s;
}
.btn-back:hover {
  background: #ffa066;
}