:root {
  --navy: #2B4A8C;
  --medium-blue: #3D5FA0;
  --purple: #7B5BB6;
  --bg: #f4f6fb;
  --text: #1c2536;
  --border: #dbe1ee;
}

* { box-sizing: border-box; }

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

.pantalla-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.tarjeta-login {
  background: #fff;
  border-radius: 16px;
  padding: 32px 28px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 8px 30px rgba(43, 74, 140, 0.12);
}

.tarjeta-login h1 {
  color: var(--navy);
  font-size: 1.4rem;
  margin: 0 0 4px;
}

.tarjeta-login p {
  color: #64708a;
  font-size: 0.9rem;
  margin: 0 0 24px;
}

.campo {
  margin-bottom: 16px;
}

.campo label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 6px;
  color: #3a4560;
}

.campo input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
}

.campo input:focus {
  outline: none;
  border-color: var(--medium-blue);
}

.boton-primario {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: var(--navy);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

.boton-primario:hover { background: var(--medium-blue); }
.boton-primario:disabled { opacity: 0.6; cursor: default; }

.error-login {
  color: #b3261e;
  font-size: 0.85rem;
  margin-top: 12px;
  min-height: 1.2em;
}

.barra-superior {
  background: var(--navy);
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.barra-superior h1 { font-size: 1.1rem; margin: 0; }

.contenedor-vacio {
  padding: 40px 20px;
  text-align: center;
  color: #64708a;
}