:root {
  --bg: #06080c;
  --s1: rgba(13, 17, 24, 0.9);
  --line: rgba(255, 255, 255, 0.08);
  --line2: rgba(255, 255, 255, 0.14);
  --t1: #edf1f6;
  --t2: #a0a9b6;
  --t3: #6c7584;
  --acc: #86dcff;
  --err: #f37f7f;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html,
body {
  height: 100%;
}
body {
  background: radial-gradient(ellipse at 50% 30%, #0d1622 0%, var(--bg) 60%);
  color: var(--t1);
  font-family:
    Inter,
    system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
main {
  width: min(360px, 100%);
  padding: 32px 28px 28px;
  background: var(--s1);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}
.mark {
  width: 36px;
  height: 36px;
  stroke: var(--acc);
  fill: none;
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 18px;
}
h1 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.sub {
  color: var(--t2);
  font-size: 14px;
  margin: 6px 0 22px;
}
form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 13px;
  color: var(--t2);
}
input {
  height: 44px;
  padding: 0 13px;
  border-radius: 10px;
  border: 1px solid var(--line2);
  background: rgba(0, 0, 0, 0.25);
  color: var(--t1);
  font: inherit;
  font-size: 15px;
  outline: none;
  transition: border-color 0.15s;
}
input:focus {
  border-color: rgba(134, 220, 255, 0.55);
}
button {
  height: 44px;
  margin-top: 6px;
  border: 0;
  border-radius: 10px;
  background: var(--t1);
  color: #0a0d12;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
button:hover {
  background: #fff;
}
button:disabled {
  opacity: 0.5;
}
.err {
  color: var(--err);
  font-size: 13px;
}
[hidden] {
  display: none !important;
}