:root{
  /* Paleta clara profesional */
  --bg-main: #f4f6f8;
  --bg-gradient-1: #eef2f6;
  --bg-gradient-2: #f8fafc;

  --card-bg: #ffffff;
  --border: #e5e7eb;

  --text: #111827;
  --muted: #6b7280;

  /* Botón celeste + gris cemento */
  --btn1:#6b93a6;
  --btn2:#5a6b75;
  --btnHover1:#7aa6bb;
  --btnHover2:#657783;
}

*{
  box-sizing: border-box;
}

body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg-main);
}

/* Corrige text-muted de Bootstrap */
.text-muted{
  color: var(--muted) !important;
}

.login-bg{
  min-height: 100vh;
  display:flex;
  align-items:center;
  padding: 32px 0;
  background:
    radial-gradient(900px 500px at 10% 10%, var(--bg-gradient-1) 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 80%, var(--bg-gradient-2) 0%, transparent 60%),
    var(--bg-main);
}

.login-card{
  border-radius: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

.brand-badge{
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  background: #f1f5f9;
  border: 1px solid var(--border);
  font-size: 1.4rem;
  color: #334155;
}

.brand-title{
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
}

.brand-subtitle{
  font-size: .95rem;
  color: var(--muted);
}

.form-label{
  font-weight: 600;
  color: #374151;
}

.form-control{
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 12px 14px;
  background: #ffffff;
  color: var(--text);
}

.form-control::placeholder{
  color: #9ca3af;
}

.form-control:focus{
  border-color: #94a3b8;
  box-shadow: 0 0 0 .2rem rgba(148,163,184,.25);
}

.btn-login{
  border-radius: 12px;
  border: none;
  background: linear-gradient(135deg, var(--btn1), var(--btn2));
  color: #ffffff;
  font-weight: 700;
  letter-spacing: .3px;
  padding: 12px;
  transition: all .15s ease;
}

.btn-login:hover{
  background: linear-gradient(135deg, var(--btnHover1), var(--btnHover2));
}

.tiny-note{
  color: var(--muted);
  font-size: .85rem;
}