:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --border: #2d3a4f;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --bad: #f07178;
  --radius: 12px;
  --font: "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: radial-gradient(ellipse at top, #1a2740 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.login-wrap { width: 100%; max-width: 400px; }
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}
.login-card h1 { font-size: 1.5rem; margin-bottom: 0.25rem; }
.sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}
input {
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #121a26;
  color: var(--text);
  font: inherit;
}
input:focus { outline: 2px solid rgba(59, 130, 246, 0.45); border-color: var(--accent); }
.btn {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.btn:disabled { opacity: 0.6; cursor: wait; }
.error { color: var(--bad); font-size: 0.85rem; margin: 0.5rem 0; }
.hidden { display: none; }