:root {
  --bg: #090b10;
  --panel: #10141c;
  --card: #161c27;
  --line: #263044;
  --text: #eef3fb;
  --muted: #8b96a8;
  --accent: #5b9dff;
  --focus: 0 0 0 3px rgba(91, 157, 255, 0.35);
}
* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  height: 100%;
  background:
    radial-gradient(
      900px 420px at 50% -10%,
      rgba(91, 157, 255, 0.1),
      transparent 55%
    ),
    var(--bg);
  color: var(--text);
  font:
    14px/1.45 "Segoe UI",
    ui-sans-serif,
    system-ui,
    sans-serif;
  color-scheme: dark;
}
body {
  display: grid;
  place-items: center;
  padding: 24px;
}
form {
  width: min(380px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--line);
}
h1 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.03em;
  font-weight: 650;
}
.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 12px;
}
label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 12px;
  font: inherit;
}
input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus);
}
button {
  margin-top: 16px;
  width: 100%;
  background: var(--accent);
  border: 0;
  border-radius: 10px;
  color: #fff;
  padding: 11px 12px;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}
button:hover:not(:disabled) {
  filter: brightness(1.06);
}
button:disabled {
  opacity: 0.6;
  cursor: default;
}
.err {
  display: none;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #3a1422;
  border: 1px solid rgba(243, 18, 96, 0.35);
  color: #ffb4c0;
}