* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: #0d0d12;
  color: #ececf2;
  font: 15px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: grid; place-items: center;
}
.card {
  width: min(360px, calc(100vw - 32px));
  display: flex; flex-direction: column; gap: 14px;
  background: #16161e; border: 1px solid #272734; border-radius: 16px; padding: 28px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; margin-bottom: 6px; }
.logo img { width: 30px; height: 30px; }
input {
  height: 44px; border-radius: 10px; border: 1px solid #2e2e3d; background: #0f0f15;
  color: #fff; padding: 0 14px; font-size: 15px; outline: none;
}
input:focus { border-color: #8b6cff; }
button {
  height: 44px; border: 0; border-radius: 10px; background: #8b6cff; color: #fff;
  font-weight: 600; font-size: 15px; cursor: pointer;
}
button:hover { background: #9a7fff; }
.err { color: #ff7d93; min-height: 18px; font-size: 14px; }