/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

/* Fondo global oscuro */
body {
  margin: 0;
  background: #0d0d0d;   /* color uniforme */
  color: #eee;
}

/* Header */
header {
  background: #000;
  color: #fff;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
  border-bottom: 6px solid #007bff; /* línea azul pipeline */
}
header .logo img {
  max-height: 70px;
}
header nav a {
  color: #fff;
  margin-left: 20px;
  text-decoration: none;
  font-weight: bold;
}
header nav .demo-btn {
  background: #007bff;
  padding: 6px 12px;
  border-radius: 4px;
  color: #fff;
}

/* Landing dividido en 2 columnas */
.landing {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: calc(100vh - 80px); /* ocupa toda la pantalla menos el header */
  padding: 40px;
  background: #0d0d0d;       /* mismo color que el body */
}
.landing .izquierda {
  flex: 1;
  text-align: center;
}
/* Columna derecha con mockup */
.landing .derecha {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}
.landing h1 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #ffd700; /* dorado */
}

/* Botón login Google */
.login-btn {
  display: inline-block;
  background: #007bff;
  color: #fff !important;
  padding: 12px 20px;
  border-radius: 6px;
  text-decoration: none !important;
  font-weight: bold;
  margin-bottom: 20px;
}
.login-btn:hover {
  background: #0056b3;
}

/* QR */
.qr img {
  max-width: 180px;
  margin-top: 10px;
}

/* Imagen mockup */
.mockup {
  max-width: 100%;        /* ocupa todo el ancho disponible */
  max-height: 80vh;       /* nunca más alto que la pantalla */
  height: auto;           /* mantiene proporción */
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.4);
}
/* Footer */
footer {
  background: #1f2937;
  color: #fff;
  text-align: center;
  padding: 15px;
  margin-top: 0;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 2000;
}
.modal-content {
  background: #1f2937;
  color: #fff;
  margin: 10% auto;
  padding: 20px;
  width: 400px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}
.modal-content h2 {
  margin-bottom: 15px;
  color: #ffd700; /* dorado */
}
.modal-content input {
  width: 90%;
  padding: 10px;
  margin: 8px 0;
  border-radius: 4px;
  border: none;
}
.modal-content button {
  padding: 10px 15px;
  margin: 5px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
.modal-content button[type="submit"] {
  background: #007bff;
  color: #fff;
}
.modal-content .close-btn {
  background: #dc3545;
  color: #fff;
}