:root {
  --bg: #0b0d10;
  --fg: #e9edf2;
  --muted: #a7b0bb;
  --card: #12161c;
  --line: #1f2630;
  --focus: #5aa7ff;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(1200px 800px at 20% 10%, #141b24 0%, var(--bg) 55%);
  color: var(--fg);
}

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

.card {
  width: min(720px, 100%);
  background: rgba(18, 22, 28, 0.85);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}

.brand {
  letter-spacing: 0.2em;
  font-weight: 700;
  font-size: 12px;
  color: var(--muted);
}

h1 {
  margin: 10px 0 12px;
  font-size: clamp(22px, 4vw, 34px);
}

.lead {
  color: var(--muted);
  line-height: 1.55;
}

.tag {
  margin-top: 6px;
}

.sep {
  border: none;
  border-top: 1px solid var(--line);
  margin: 18px 0;
}

.form label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

input {
  flex: 1 1 220px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0f1318;
  color: var(--fg);
  padding: 0 12px;
}

button {
  height: 44px;
  padding: 0 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #141b24;
  color: var(--fg);
  font-weight: 600;
}

.hint {
  margin-top: 10px;
  font-size: 12px;
  color: var(--muted);
}

.mini {
  margin-top: 16px;
  font-size: 12px;
  color: var(--muted);
}