:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --border: #2a2f3a;
  --text: #e8eaf0;
  --muted: #9aa3b2;
  --accent: #6c8cff;
  --accent-h: #839dff;
  --danger: #ff7a72;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(1200px 600px at 50% -10%, #1c2230 0%, var(--bg) 60%);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.card {
  width: 360px;
  max-width: calc(100vw - 32px);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, .45);
}
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.logo {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #9a6cff);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700; color: #fff;
}
h1 { margin: 0; font-size: 20px; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
label { display: block; margin: 14px 0 6px; font-size: 13px; color: var(--muted); }
input {
  width: 100%; padding: 10px 12px;
  background: #12151c; color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; outline: none;
}
input:focus { border-color: var(--accent); }
button {
  width: 100%; margin-top: 20px; padding: 11px;
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  font-size: 15px; font-weight: 600; cursor: pointer;
}
button:hover { background: var(--accent-h); }
button:disabled { opacity: .6; cursor: default; }
.error { color: var(--danger); font-size: 13px; margin: 12px 0 0; }
.foot { margin: 18px 0 0; color: var(--muted); font-size: 12px; text-align: center; }