:root {
  --bg: #0e141b;
  --panel: #172029;
  --line: #2a3a49;
  --text: #d7e0ea;
  --muted: #7d8b9a;
  --accent: #1a9fff;
  --red: #ef5350;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Segoe UI", system-ui, sans-serif;
}

.wrap {
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.brand {
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 1px;
  color: var(--accent);
  text-align: center;
}

.sub {
  margin: -6px 0 8px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label span {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  font: inherit;
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

.btn {
  margin-top: 4px;
  border: none;
  border-radius: 8px;
  padding: 11px 14px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.55;
  cursor: default;
}

.err {
  min-height: 18px;
  margin: 0;
  color: var(--red);
  font-size: 13px;
}